/*
- * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * All rights reserved.
+ * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
*
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
*
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
*
- * 3. Neither the name of the Institute nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
*/
+#define KRB5_DEPRECATED
+
#include "krb5_locl.h"
-RCSID("$Id: crypto.c,v 1.128 2005/07/20 07:22:43 lha Exp $");
+#include <pkinit_asn1.h>
-#undef CRYPTO_DEBUG
-#ifdef CRYPTO_DEBUG
-static void krb5_crypto_debug(krb5_context, int, size_t, krb5_keyblock*);
+#ifndef HEIMDAL_SMALLER
+#define DES3_OLD_ENCTYPE 1
#endif
-
struct key_data {
krb5_keyblock *key;
krb5_data *schedule;
struct key_data key;
int num_key_usage;
struct key_usage *key_usage;
- void *params;
};
-#define kcrypto_oid_enc(n) { sizeof(n)/sizeof(n[0]), n }
-
#define CRYPTO_ETYPE(C) ((C)->et->type)
/* bits for `flags' below */
#define F_PSEUDO 16 /* not a real protocol type */
#define F_SPECIAL 32 /* backwards */
#define F_DISABLED 64 /* enctype/checksum disabled */
-#define F_PADCMS 128 /* padding done like in CMS */
struct salt_type {
krb5_salttype type;
const char *name;
- krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data,
+ krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data,
krb5_salt, krb5_data, krb5_keyblock*);
};
const char *name;
size_t bits;
size_t size;
- size_t minsize;
size_t schedule_size;
-#if 0
- krb5_enctype best_etype;
-#endif
void (*random_key)(krb5_context, krb5_keyblock*);
- void (*schedule)(krb5_context, struct key_data *, const void *);
+ void (*schedule)(krb5_context, struct key_type *, struct key_data *);
struct salt_type *string_to_key;
void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t);
- krb5_error_code (*get_params)(krb5_context, const krb5_data *,
- void **, krb5_data *);
- krb5_error_code (*set_params)(krb5_context, const void *,
- const krb5_data *, krb5_data *);
+ void (*cleanup)(krb5_context, struct key_data *);
+ const EVP_CIPHER *(*evp)(void);
};
struct checksum_type {
size_t blocksize;
size_t checksumsize;
unsigned flags;
- void (*checksum)(krb5_context context,
- struct key_data *key,
- const void *buf, size_t len,
- unsigned usage,
- Checksum *csum);
+ krb5_enctype (*checksum)(krb5_context context,
+ struct key_data *key,
+ const void *buf, size_t len,
+ unsigned usage,
+ Checksum *csum);
krb5_error_code (*verify)(krb5_context context,
struct key_data *key,
const void *buf, size_t len,
struct encryption_type {
krb5_enctype type;
const char *name;
- heim_oid *oid;
size_t blocksize;
size_t padsize;
size_t confoundersize;
krb5_boolean encryptp,
int usage,
void *ivec);
+ size_t prf_length;
+ krb5_error_code (*prf)(krb5_context,
+ krb5_crypto, const krb5_data *, krb5_data *);
};
#define ENCRYPTION_USAGE(U) (((U) << 8) | 0xAA)
static struct checksum_type *_find_checksum(krb5_cksumtype type);
static struct encryption_type *_find_enctype(krb5_enctype type);
-static struct key_type *_find_keytype(krb5_keytype type);
-static krb5_error_code _get_derived_key(krb5_context, krb5_crypto,
+static krb5_error_code _get_derived_key(krb5_context, krb5_crypto,
unsigned, struct key_data**);
static struct key_data *_new_derived_key(krb5_crypto crypto, unsigned usage);
static krb5_error_code derive_key(krb5_context context,
const void *constant,
size_t len);
static krb5_error_code hmac(krb5_context context,
- struct checksum_type *cm,
- const void *data,
- size_t len,
+ struct checksum_type *cm,
+ const void *data,
+ size_t len,
unsigned usage,
struct key_data *keyblock,
Checksum *result);
-static void free_key_data(krb5_context context, struct key_data *key);
+static void free_key_data(krb5_context,
+ struct key_data *,
+ struct encryption_type *);
+static void free_key_schedule(krb5_context,
+ struct key_data *,
+ struct encryption_type *);
static krb5_error_code usage2arcfour (krb5_context, unsigned *);
static void xor (DES_cblock *, const unsigned char *);
* *
************************************************************/
-static HEIMDAL_MUTEX crypto_mutex = HEIMDAL_MUTEX_INITIALIZER;
+struct evp_schedule {
+ EVP_CIPHER_CTX ectx;
+ EVP_CIPHER_CTX dctx;
+};
+static HEIMDAL_MUTEX crypto_mutex = HEIMDAL_MUTEX_INITIALIZER;
+
+#ifdef HEIM_WEAK_CRYPTO
static void
krb5_DES_random_key(krb5_context context,
- krb5_keyblock *key)
+ krb5_keyblock *key)
{
DES_cblock *k = key->keyvalue.data;
do {
}
static void
-krb5_DES_schedule(krb5_context context,
- struct key_data *key,
- const void *params)
-{
- DES_set_key(key->key->keyvalue.data, key->schedule->data);
-}
-
-static void
-DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
-{
- DES_key_schedule schedule;
- int i;
- int reverse = 0;
- unsigned char *p;
-
- unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
- 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
- memset(key, 0, 8);
-
- p = (unsigned char*)key;
- for (i = 0; i < length; i++) {
- unsigned char tmp = data[i];
- if (!reverse)
- *p++ ^= (tmp << 1);
- else
- *--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
- if((i % 8) == 7)
- reverse = !reverse;
- }
- DES_set_odd_parity(key);
- if(DES_is_weak_key(key))
- (*key)[7] ^= 0xF0;
- DES_set_key(key, &schedule);
- DES_cbc_cksum((void*)data, key, length, &schedule, key);
- memset(&schedule, 0, sizeof(schedule));
- DES_set_odd_parity(key);
- if(DES_is_weak_key(key))
- (*key)[7] ^= 0xF0;
-}
-
-static krb5_error_code
-krb5_DES_string_to_key(krb5_context context,
- krb5_enctype enctype,
- krb5_data password,
- krb5_salt salt,
- krb5_data opaque,
- krb5_keyblock *key)
+krb5_DES_schedule_old(krb5_context context,
+ struct key_type *kt,
+ struct key_data *key)
{
- unsigned char *s;
- size_t len;
- DES_cblock tmp;
-
- len = password.length + salt.saltvalue.length;
- s = malloc(len);
- if(len > 0 && s == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
- return ENOMEM;
- }
- memcpy(s, password.data, password.length);
- memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
- DES_string_to_key_int(s, len, &tmp);
- key->keytype = enctype;
- krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
- memset(&tmp, 0, sizeof(tmp));
- memset(s, 0, len);
- free(s);
- return 0;
+ DES_set_key_unchecked(key->key->keyvalue.data, key->schedule->data);
}
#ifdef ENABLE_AFS_STRING_TO_KEY
/* This defines the Andrew string_to_key function. It accepts a password
- * string as input and converts its via a one-way encryption algorithm to a DES
+ * string as input and converts it via a one-way encryption algorithm to a DES
* encryption key. It is compatible with the original Andrew authentication
* service password database.
*/
*/
static void
krb5_DES_AFS3_CMU_string_to_key (krb5_data pw,
- krb5_data cell,
- DES_cblock *key)
+ krb5_data cell,
+ DES_cblock *key)
{
char password[8+1]; /* crypt is limited to 8 chars anyway */
int i;
-
+
for(i = 0; i < 8; i++) {
char c = ((i < pw.length) ? ((char*)pw.data)[i] : 0) ^
- ((i < cell.length) ?
- tolower(((unsigned char*)cell.data)[i]) : 0);
+ ((i < cell.length) ?
+ tolower(((unsigned char*)cell.data)[i]) : 0);
password[i] = c ? c : 'X';
}
password[8] = '\0';
*/
static void
krb5_DES_AFS3_Transarc_string_to_key (krb5_data pw,
- krb5_data cell,
- DES_cblock *key)
+ krb5_data cell,
+ DES_cblock *key)
{
DES_key_schedule schedule;
DES_cblock temp_key;
memcpy(&ivec, "kerberos", 8);
memcpy(&temp_key, "kerberos", 8);
DES_set_odd_parity (&temp_key);
- DES_set_key (&temp_key, &schedule);
+ DES_set_key_unchecked (&temp_key, &schedule);
DES_cbc_cksum ((void*)password, &ivec, passlen, &schedule, &ivec);
memcpy(&temp_key, &ivec, 8);
DES_set_odd_parity (&temp_key);
- DES_set_key (&temp_key, &schedule);
+ DES_set_key_unchecked (&temp_key, &schedule);
DES_cbc_cksum ((void*)password, key, passlen, &schedule, &ivec);
memset(&schedule, 0, sizeof(schedule));
memset(&temp_key, 0, sizeof(temp_key));
}
#endif /* ENABLE_AFS_STRING_TO_KEY */
+static void
+DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
+{
+ DES_key_schedule schedule;
+ int i;
+ int reverse = 0;
+ unsigned char *p;
+
+ unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
+ 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
+ memset(key, 0, 8);
+
+ p = (unsigned char*)key;
+ for (i = 0; i < length; i++) {
+ unsigned char tmp = data[i];
+ if (!reverse)
+ *p++ ^= (tmp << 1);
+ else
+ *--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
+ if((i % 8) == 7)
+ reverse = !reverse;
+ }
+ DES_set_odd_parity(key);
+ if(DES_is_weak_key(key))
+ (*key)[7] ^= 0xF0;
+ DES_set_key_unchecked(key, &schedule);
+ DES_cbc_cksum((void*)data, key, length, &schedule, key);
+ memset(&schedule, 0, sizeof(schedule));
+ DES_set_odd_parity(key);
+ if(DES_is_weak_key(key))
+ (*key)[7] ^= 0xF0;
+}
+
+static krb5_error_code
+krb5_DES_string_to_key(krb5_context context,
+ krb5_enctype enctype,
+ krb5_data password,
+ krb5_salt salt,
+ krb5_data opaque,
+ krb5_keyblock *key)
+{
+ unsigned char *s;
+ size_t len;
+ DES_cblock tmp;
+
+#ifdef ENABLE_AFS_STRING_TO_KEY
+ if (opaque.length == 1) {
+ unsigned long v;
+ _krb5_get_int(opaque.data, &v, 1);
+ if (v == 1)
+ return DES_AFS3_string_to_key(context, enctype, password,
+ salt, opaque, key);
+ }
+#endif
+
+ len = password.length + salt.saltvalue.length;
+ s = malloc(len);
+ if(len > 0 && s == NULL) {
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+ memcpy(s, password.data, password.length);
+ memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
+ DES_string_to_key_int(s, len, &tmp);
+ key->keytype = enctype;
+ krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
+ memset(&tmp, 0, sizeof(tmp));
+ memset(s, 0, len);
+ free(s);
+ return 0;
+}
+
static void
krb5_DES_random_to_key(krb5_context context,
krb5_keyblock *key,
if(DES_is_weak_key(k))
xor(k, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
}
+#endif
/*
*
DES_is_weak_key(&k[2]));
}
-static void
-DES3_schedule(krb5_context context,
- struct key_data *key,
- const void *params)
-{
- DES_cblock *k = key->key->keyvalue.data;
- DES_key_schedule *s = key->schedule->data;
- DES_set_key(&k[0], &s[0]);
- DES_set_key(&k[1], &s[1]);
- DES_set_key(&k[2], &s[2]);
-}
-
/*
* A = A xor B. A & B are 8 bytes.
*/
a[7] ^= b[7];
}
+#ifdef DES3_OLD_ENCTYPE
static krb5_error_code
DES3_string_to_key(krb5_context context,
krb5_enctype enctype,
size_t len;
unsigned char tmp[24];
DES_cblock keys[3];
-
+ krb5_error_code ret;
+
len = password.length + salt.saltvalue.length;
str = malloc(len);
if(len != 0 && str == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
memcpy(str, password.data, password.length);
DES_key_schedule s[3];
int i;
- _krb5_n_fold(str, len, tmp, 24);
+ ret = _krb5_n_fold(str, len, tmp, 24);
+ if (ret) {
+ memset(str, 0, len);
+ free(str);
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ return ret;
+ }
for(i = 0; i < 3; i++){
memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
DES_set_odd_parity(keys + i);
if(DES_is_weak_key(keys + i))
xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
- DES_set_key(keys + i, &s[i]);
+ DES_set_key_unchecked(keys + i, &s[i]);
}
memset(&ivec, 0, sizeof(ivec));
DES_ede3_cbc_encrypt(tmp,
- tmp, sizeof(tmp),
+ tmp, sizeof(tmp),
&s[0], &s[1], &s[2], &ivec, DES_ENCRYPT);
memset(s, 0, sizeof(s));
memset(&ivec, 0, sizeof(ivec));
free(str);
return 0;
}
+#endif
static krb5_error_code
DES3_string_to_key_derived(krb5_context context,
s = malloc(len);
if(len != 0 && s == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
memcpy(s, password.data, password.length);
DES_set_odd_parity(&k[i]);
if(DES_is_weak_key(&k[i]))
xor(&k[i], (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
- }
+ }
}
/*
* ARCFOUR
*/
-static void
-ARCFOUR_schedule(krb5_context context,
- struct key_data *kd,
- const void *params)
-{
- RC4_set_key (kd->schedule->data,
- kd->key->keyvalue.length, kd->key->keyvalue.data);
-}
-
static krb5_error_code
ARCFOUR_string_to_key(krb5_context context,
- krb5_enctype enctype,
- krb5_data password,
- krb5_salt salt,
- krb5_data opaque,
- krb5_keyblock *key)
+ krb5_enctype enctype,
+ krb5_data password,
+ krb5_salt salt,
+ krb5_data opaque,
+ krb5_keyblock *key)
{
- char *s, *p;
- size_t len;
- int i;
- MD4_CTX m;
+ krb5_error_code ret;
+ uint16_t *s = NULL;
+ size_t len, i;
+ EVP_MD_CTX *m;
- len = 2 * password.length;
- s = malloc (len);
- if (len != 0 && s == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
- return ENOMEM;
+ m = EVP_MD_CTX_create();
+ if (m == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ goto out;
}
- for (p = s, i = 0; i < password.length; ++i) {
- *p++ = ((char *)password.data)[i];
- *p++ = 0;
- }
- MD4_Init (&m);
- MD4_Update (&m, s, len);
- key->keytype = enctype;
- krb5_data_alloc (&key->keyvalue, 16);
- MD4_Final (key->keyvalue.data, &m);
- memset (s, 0, len);
- free (s);
- return 0;
-}
-
-/*
- * AES
- */
-
-/* iter is really 1 based, so iter == 0 will be 1 iteration */
-krb5_error_code KRB5_LIB_FUNCTION
-_krb5_PKCS5_PBKDF2(krb5_context context, krb5_cksumtype cktype,
- krb5_data password, krb5_salt salt, u_int32_t iter,
- krb5_keytype type, krb5_keyblock *key)
-{
- struct checksum_type *c = _find_checksum(cktype);
- struct key_type *kt;
- size_t datalen, leftofkey;
- krb5_error_code ret;
- u_int32_t keypart;
- struct key_data ksign;
- krb5_keyblock kb;
- Checksum result;
- char *data, *tmpcksum;
- int i, j;
- char *p;
-
- if (c == NULL) {
- krb5_set_error_string(context, "checksum %d not supported", cktype);
- return KRB5_PROG_KEYTYPE_NOSUPP;
- }
+ EVP_DigestInit_ex(m, EVP_md4(), NULL);
- kt = _find_keytype(type);
- if (kt == NULL) {
- krb5_set_error_string(context, "key type %d not supported", type);
- return KRB5_PROG_KEYTYPE_NOSUPP;
- }
-
- key->keytype = type;
- ret = krb5_data_alloc (&key->keyvalue, kt->bits / 8);
+ ret = wind_utf8ucs2_length(password.data, &len);
if (ret) {
- krb5_set_error_string(context, "malloc: out of memory");
- return ret;
+ krb5_set_error_message (context, ret,
+ N_("Password not an UCS2 string", ""));
+ goto out;
}
- ret = krb5_data_alloc (&result.checksum, c->checksumsize);
- if (ret) {
- krb5_set_error_string(context, "malloc: out of memory");
- krb5_data_free (&key->keyvalue);
- return ret;
+ s = malloc (len * sizeof(s[0]));
+ if (len != 0 && s == NULL) {
+ krb5_set_error_message (context, ENOMEM,
+ N_("malloc: out of memory", ""));
+ ret = ENOMEM;
+ goto out;
}
- tmpcksum = malloc(c->checksumsize);
- if (tmpcksum == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
- krb5_data_free (&key->keyvalue);
- krb5_data_free (&result.checksum);
- return ENOMEM;
+ ret = wind_utf8ucs2(password.data, s, &len);
+ if (ret) {
+ krb5_set_error_message (context, ret,
+ N_("Password not an UCS2 string", ""));
+ goto out;
}
- datalen = salt.saltvalue.length + 4;
- data = malloc(datalen);
- if (data == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
- free(tmpcksum);
- krb5_data_free (&key->keyvalue);
- krb5_data_free (&result.checksum);
- return ENOMEM;
+ /* LE encoding */
+ for (i = 0; i < len; i++) {
+ unsigned char p;
+ p = (s[i] & 0xff);
+ EVP_DigestUpdate (m, &p, 1);
+ p = (s[i] >> 8) & 0xff;
+ EVP_DigestUpdate (m, &p, 1);
}
- kb.keyvalue = password;
- ksign.key = &kb;
-
- memcpy(data, salt.saltvalue.data, salt.saltvalue.length);
-
- keypart = 1;
- leftofkey = key->keyvalue.length;
- p = key->keyvalue.data;
-
- while (leftofkey) {
- int len;
-
- if (leftofkey > c->checksumsize)
- len = c->checksumsize;
- else
- len = leftofkey;
-
- _krb5_put_int(data + datalen - 4, keypart, 4);
-
- ret = hmac(context, c, data, datalen, 0, &ksign, &result);
- if (ret)
- krb5_abortx(context, "hmac failed");
- memcpy(p, result.checksum.data, len);
- memcpy(tmpcksum, result.checksum.data, result.checksum.length);
- for (i = 0; i < iter; i++) {
- ret = hmac(context, c, tmpcksum, result.checksum.length,
- 0, &ksign, &result);
- if (ret)
- krb5_abortx(context, "hmac failed");
- memcpy(tmpcksum, result.checksum.data, result.checksum.length);
- for (j = 0; j < len; j++)
- p[j] ^= tmpcksum[j];
- }
-
- p += len;
- leftofkey -= len;
- keypart++;
+ key->keytype = enctype;
+ ret = krb5_data_alloc (&key->keyvalue, 16);
+ if (ret) {
+ krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
+ goto out;
}
+ EVP_DigestFinal_ex (m, key->keyvalue.data, NULL);
- free(data);
- free(tmpcksum);
- krb5_data_free (&result.checksum);
-
- return 0;
+ out:
+ EVP_MD_CTX_destroy(m);
+ if (s)
+ memset (s, 0, len);
+ free (s);
+ return ret;
}
+/*
+ * AES
+ */
+
int _krb5_AES_string_to_default_iterator = 4096;
static krb5_error_code
krb5_keyblock *key)
{
krb5_error_code ret;
- u_int32_t iter;
+ uint32_t iter;
struct encryption_type *et;
struct key_data kd;
if (opaque.length == 0)
- iter = _krb5_AES_string_to_default_iterator - 1;
+ iter = _krb5_AES_string_to_default_iterator;
else if (opaque.length == 4) {
unsigned long v;
_krb5_get_int(opaque.data, &v, 4);
- iter = ((u_int32_t)v) - 1;
+ iter = ((uint32_t)v);
} else
return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
-
et = _find_enctype(enctype);
if (et == NULL)
return KRB5_PROG_KEYTYPE_NOSUPP;
- ret = _krb5_PKCS5_PBKDF2(context, CKSUMTYPE_SHA1, password, salt,
- iter, enctype, key);
- if (ret)
+ kd.schedule = NULL;
+ ALLOC(kd.key, 1);
+ if(kd.key == NULL) {
+ krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+ kd.key->keytype = enctype;
+ ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
+ if (ret) {
+ krb5_set_error_message (context, ret, N_("malloc: out of memory", ""));
return ret;
+ }
- ret = krb5_copy_keyblock(context, key, &kd.key);
- kd.schedule = NULL;
+ ret = PKCS5_PBKDF2_HMAC_SHA1(password.data, password.length,
+ salt.saltvalue.data, salt.saltvalue.length,
+ iter,
+ et->keytype->size, kd.key->keyvalue.data);
+ if (ret != 1) {
+ free_key_data(context, &kd, et);
+ krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
+ "Error calculating s2k");
+ return KRB5_PROG_KEYTYPE_NOSUPP;
+ }
ret = derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
- krb5_free_keyblock_contents(context, key);
- if (ret == 0) {
+ if (ret == 0)
ret = krb5_copy_keyblock_contents(context, kd.key, key);
- free_key_data(context, &kd);
- }
+ free_key_data(context, &kd, et);
return ret;
}
-struct krb5_aes_schedule {
- AES_KEY ekey;
- AES_KEY dkey;
-};
-
static void
-AES_schedule(krb5_context context,
- struct key_data *kd,
- const void *params)
+evp_schedule(krb5_context context, struct key_type *kt, struct key_data *kd)
{
- struct krb5_aes_schedule *key = kd->schedule->data;
- int bits = kd->key->keyvalue.length * 8;
+ struct evp_schedule *key = kd->schedule->data;
+ const EVP_CIPHER *c = (*kt->evp)();
- memset(key, 0, sizeof(*key));
- AES_set_encrypt_key(kd->key->keyvalue.data, bits, &key->ekey);
- AES_set_decrypt_key(kd->key->keyvalue.data, bits, &key->dkey);
+ EVP_CIPHER_CTX_init(&key->ectx);
+ EVP_CIPHER_CTX_init(&key->dctx);
+
+ EVP_CipherInit_ex(&key->ectx, c, NULL, kd->key->keyvalue.data, NULL, 1);
+ EVP_CipherInit_ex(&key->dctx, c, NULL, kd->key->keyvalue.data, NULL, 0);
+}
+
+static void
+evp_cleanup(krb5_context context, struct key_data *kd)
+{
+ struct evp_schedule *key = kd->schedule->data;
+ EVP_CIPHER_CTX_cleanup(&key->ectx);
+ EVP_CIPHER_CTX_cleanup(&key->dctx);
}
/*
- * RC2
+ *
*/
-struct _RC2_params {
- int maximum_effective_key;
+#ifdef HEIM_WEAK_CRYPTO
+static struct salt_type des_salt[] = {
+ {
+ KRB5_PW_SALT,
+ "pw-salt",
+ krb5_DES_string_to_key
+ },
+#ifdef ENABLE_AFS_STRING_TO_KEY
+ {
+ KRB5_AFS3_SALT,
+ "afs3-salt",
+ DES_AFS3_string_to_key
+ },
+#endif
+ { 0 }
};
-
-static krb5_error_code
-rc2_get_params(krb5_context context,
- const krb5_data *data,
- void **params,
- krb5_data *ivec)
-{
- RC2CBCParameter rc2params;
- struct _RC2_params *p;
- krb5_error_code ret;
- size_t size;
-
- ret = decode_RC2CBCParameter(data->data, data->length, &rc2params, &size);
- if (ret) {
- krb5_set_error_string(context, "Can't decode RC2 parameters");
- return ret;
- }
- p = malloc(sizeof(*p));
- if (p == NULL) {
- free_RC2CBCParameter(&rc2params);
- krb5_set_error_string(context, "malloc - out of memory");
- return ENOMEM;
- }
- /* XXX */
- switch(rc2params.rc2ParameterVersion) {
- case 160:
- p->maximum_effective_key = 40;
- break;
- case 120:
- p->maximum_effective_key = 64;
- break;
- case 58:
- p->maximum_effective_key = 128;
- break;
-
- }
- if (ivec)
- ret = copy_octet_string(&rc2params.iv, ivec);
- free_RC2CBCParameter(&rc2params);
- *params = p;
-
- return ret;
-}
-
-static krb5_error_code
-rc2_set_params(krb5_context context,
- const void *params,
- const krb5_data *ivec,
- krb5_data *data)
-{
- RC2CBCParameter rc2params;
- const struct _RC2_params *p = params;
- int maximum_effective_key = 128;
- krb5_error_code ret;
- size_t size;
-
- memset(&rc2params, 0, sizeof(rc2params));
-
- if (p)
- maximum_effective_key = p->maximum_effective_key;
-
- /* XXX */
- switch(maximum_effective_key) {
- case 40:
- rc2params.rc2ParameterVersion = 160;
- break;
- case 64:
- rc2params.rc2ParameterVersion = 120;
- break;
- case 128:
- rc2params.rc2ParameterVersion = 58;
- break;
- }
- ret = copy_octet_string(ivec, &rc2params.iv);
- if (ret)
- return ret;
-
- ASN1_MALLOC_ENCODE(RC2CBCParameter, data->data, data->length,
- &rc2params, &size, ret);
- if (ret == 0 && size != data->length)
- krb5_abortx(context, "Internal asn1 encoder failure");
- free_RC2CBCParameter(&rc2params);
-
- return ret;
-}
-
-static void
-rc2_schedule(krb5_context context,
- struct key_data *kd,
- const void *params)
-{
- const struct _RC2_params *p = params;
- int maximum_effective_key = 128;
- if (p)
- maximum_effective_key = p->maximum_effective_key;
- RC2_set_key (kd->schedule->data,
- kd->key->keyvalue.length,
- kd->key->keyvalue.data,
- maximum_effective_key);
-}
-
-
-/*
- *
- */
-
-static struct salt_type des_salt[] = {
- {
- KRB5_PW_SALT,
- "pw-salt",
- krb5_DES_string_to_key
- },
-#ifdef ENABLE_AFS_STRING_TO_KEY
- {
- KRB5_AFS3_SALT,
- "afs3-salt",
- DES_AFS3_string_to_key
- },
#endif
- { 0 }
-};
+#ifdef DES3_OLD_ENCTYPE
static struct salt_type des3_salt[] = {
{
KRB5_PW_SALT,
},
{ 0 }
};
+#endif
static struct salt_type des3_salt_derived[] = {
{
0,
0,
0,
- 0,
NULL,
NULL,
NULL
};
-static struct key_type keytype_des = {
+#ifdef HEIM_WEAK_CRYPTO
+static struct key_type keytype_des_old = {
KEYTYPE_DES,
- "des",
+ "des-old",
56,
- sizeof(DES_cblock),
- sizeof(DES_cblock),
+ 8,
sizeof(DES_key_schedule),
krb5_DES_random_key,
- krb5_DES_schedule,
+ krb5_DES_schedule_old,
des_salt,
krb5_DES_random_to_key
};
+static struct key_type keytype_des = {
+ KEYTYPE_DES,
+ "des",
+ 56,
+ 8,
+ sizeof(struct evp_schedule),
+ krb5_DES_random_key,
+ evp_schedule,
+ des_salt,
+ krb5_DES_random_to_key,
+ evp_cleanup,
+ EVP_des_cbc
+};
+#endif /* HEIM_WEAK_CRYPTO */
+
+#ifdef DES3_OLD_ENCTYPE
static struct key_type keytype_des3 = {
KEYTYPE_DES3,
"des3",
168,
- 3 * sizeof(DES_cblock),
- 3 * sizeof(DES_cblock),
- 3 * sizeof(DES_key_schedule),
+ 24,
+ sizeof(struct evp_schedule),
DES3_random_key,
- DES3_schedule,
+ evp_schedule,
des3_salt,
- DES3_random_to_key
+ DES3_random_to_key,
+ evp_cleanup,
+ EVP_des_ede3_cbc
};
+#endif
static struct key_type keytype_des3_derived = {
KEYTYPE_DES3,
"des3",
168,
- 3 * sizeof(DES_cblock),
- 3 * sizeof(DES_cblock),
- 3 * sizeof(DES_key_schedule),
+ 24,
+ sizeof(struct evp_schedule),
DES3_random_key,
- DES3_schedule,
+ evp_schedule,
des3_salt_derived,
- DES3_random_to_key
+ DES3_random_to_key,
+ evp_cleanup,
+ EVP_des_ede3_cbc
};
static struct key_type keytype_aes128 = {
"aes-128",
128,
16,
- 16,
- sizeof(struct krb5_aes_schedule),
+ sizeof(struct evp_schedule),
NULL,
- AES_schedule,
- AES_salt
-};
-
-static struct key_type keytype_aes192 = {
- KEYTYPE_AES192,
- "aes-192",
- 192,
- 24,
- 24,
- sizeof(struct krb5_aes_schedule),
+ evp_schedule,
+ AES_salt,
NULL,
- AES_schedule,
- AES_salt
+ evp_cleanup,
+ EVP_aes_128_cbc
};
static struct key_type keytype_aes256 = {
"aes-256",
256,
32,
- 32,
- sizeof(struct krb5_aes_schedule),
+ sizeof(struct evp_schedule),
+ NULL,
+ evp_schedule,
+ AES_salt,
NULL,
- AES_schedule,
- AES_salt
+ evp_cleanup,
+ EVP_aes_256_cbc
};
static struct key_type keytype_arcfour = {
"arcfour",
128,
16,
- 16,
- sizeof(RC4_KEY),
- NULL,
- ARCFOUR_schedule,
- arcfour_salt
-};
-
-static struct key_type keytype_rc2 = {
- KEYTYPE_RC2,
- "rc2",
- 128,
- 16,
- 1,
- sizeof(RC2_KEY),
+ sizeof(struct evp_schedule),
NULL,
- rc2_schedule,
- NULL, /* XXX salt */
+ evp_schedule,
+ arcfour_salt,
NULL,
- rc2_get_params,
- rc2_set_params
-};
-
-static struct key_type *keytypes[] = {
- &keytype_null,
- &keytype_des,
- &keytype_des3_derived,
- &keytype_des3,
- &keytype_aes128,
- &keytype_aes192,
- &keytype_aes256,
- &keytype_rc2,
- &keytype_arcfour
+ evp_cleanup,
+ EVP_rc4
};
-static int num_keytypes = sizeof(keytypes) / sizeof(keytypes[0]);
-
-static struct key_type *
-_find_keytype(krb5_keytype type)
-{
- int i;
- for(i = 0; i < num_keytypes; i++)
- if(keytypes[i]->type == type)
- return keytypes[i];
- return NULL;
-}
-
-
krb5_error_code KRB5_LIB_FUNCTION
krb5_salttype_to_string (krb5_context context,
krb5_enctype etype,
e = _find_enctype (etype);
if (e == NULL) {
- krb5_set_error_string(context, "encryption type %d not supported",
- etype);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ "encryption type %d not supported",
+ etype);
return KRB5_PROG_ETYPE_NOSUPP;
}
for (st = e->keytype->string_to_key; st && st->type; st++) {
if (st->type == stype) {
*string = strdup (st->name);
if (*string == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message (context, ENOMEM,
+ N_("malloc: out of memory", ""));
return ENOMEM;
}
return 0;
}
}
- krb5_set_error_string(context, "salttype %d not supported", stype);
+ krb5_set_error_message (context, HEIM_ERR_SALTTYPE_NOSUPP,
+ "salttype %d not supported", stype);
return HEIM_ERR_SALTTYPE_NOSUPP;
}
e = _find_enctype (etype);
if (e == NULL) {
- krb5_set_error_string(context, "encryption type %d not supported",
- etype);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
return KRB5_PROG_ETYPE_NOSUPP;
}
for (st = e->keytype->string_to_key; st && st->type; st++) {
return 0;
}
}
- krb5_set_error_string(context, "salttype %s not supported", string);
+ krb5_set_error_message(context, HEIM_ERR_SALTTYPE_NOSUPP,
+ N_("salttype %s not supported", ""), string);
return HEIM_ERR_SALTTYPE_NOSUPP;
}
int i;
krb5_error_code ret;
char *p;
-
+
salt->salttype = KRB5_PW_SALT;
len = strlen(principal->realm);
for (i = 0; i < principal->name.name_string.len; ++i)
}
krb5_error_code KRB5_LIB_FUNCTION
-krb5_free_salt(krb5_context context,
+krb5_free_salt(krb5_context context,
krb5_salt salt)
{
krb5_data_free(&salt.saltvalue);
{
krb5_data opaque;
krb5_data_zero(&opaque);
- return krb5_string_to_key_data_salt_opaque(context, enctype, password,
+ return krb5_string_to_key_data_salt_opaque(context, enctype, password,
salt, opaque, key);
}
struct encryption_type *et =_find_enctype(enctype);
struct salt_type *st;
if(et == NULL) {
- krb5_set_error_string(context, "encryption type %d not supported",
- enctype);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ enctype);
return KRB5_PROG_ETYPE_NOSUPP;
}
- for(st = et->keytype->string_to_key; st && st->type; st++)
+ for(st = et->keytype->string_to_key; st && st->type; st++)
if(st->type == salt.salttype)
- return (*st->string_to_key)(context, enctype, password,
+ return (*st->string_to_key)(context, enctype, password,
salt, opaque, key);
- krb5_set_error_string(context, "salt type %d not supported",
- salt.salttype);
+ krb5_set_error_message(context, HEIM_ERR_SALTTYPE_NOSUPP,
+ N_("salt type %d not supported", ""),
+ salt.salttype);
return HEIM_ERR_SALTTYPE_NOSUPP;
}
krb5_data pw;
pw.data = rk_UNCONST(password);
pw.length = strlen(password);
- return krb5_string_to_key_data_salt_opaque(context, enctype,
+ return krb5_string_to_key_data_salt_opaque(context, enctype,
pw, salt, opaque, key);
}
krb5_error_code KRB5_LIB_FUNCTION
-krb5_keytype_to_string(krb5_context context,
- krb5_keytype keytype,
- char **string)
+krb5_enctype_keysize(krb5_context context,
+ krb5_enctype type,
+ size_t *keysize)
{
- struct key_type *kt = _find_keytype(keytype);
- if(kt == NULL) {
- krb5_set_error_string(context, "key type %d not supported", keytype);
- return KRB5_PROG_KEYTYPE_NOSUPP;
- }
- *string = strdup(kt->name);
- if(*string == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
- return ENOMEM;
+ struct encryption_type *et = _find_enctype(type);
+ if(et == NULL) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ type);
+ return KRB5_PROG_ETYPE_NOSUPP;
}
+ *keysize = et->keytype->size;
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
-krb5_string_to_keytype(krb5_context context,
- const char *string,
- krb5_keytype *keytype)
-{
- int i;
- for(i = 0; i < num_keytypes; i++)
- if(strcasecmp(keytypes[i]->name, string) == 0){
- *keytype = keytypes[i]->type;
- return 0;
- }
- krb5_set_error_string(context, "key type %s not supported", string);
- return KRB5_PROG_KEYTYPE_NOSUPP;
-}
-
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_enctype_keysize(krb5_context context,
+krb5_enctype_keybits(krb5_context context,
krb5_enctype type,
- size_t *keysize)
+ size_t *keybits)
{
struct encryption_type *et = _find_enctype(type);
if(et == NULL) {
- krb5_set_error_string(context, "encryption type %d not supported",
- type);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ "encryption type %d not supported",
+ type);
return KRB5_PROG_ETYPE_NOSUPP;
}
- *keysize = et->keytype->size;
+ *keybits = et->keytype->bits;
return 0;
}
krb5_error_code ret;
struct encryption_type *et = _find_enctype(type);
if(et == NULL) {
- krb5_set_error_string(context, "encryption type %d not supported",
- type);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ type);
return KRB5_PROG_ETYPE_NOSUPP;
}
ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
- if(ret)
+ if(ret)
return ret;
key->keytype = type;
if(et->keytype->random_key)
(*et->keytype->random_key)(context, key);
else
- krb5_generate_random_block(key->keyvalue.data,
+ krb5_generate_random_block(key->keyvalue.data,
key->keyvalue.length);
return 0;
}
static krb5_error_code
_key_schedule(krb5_context context,
- struct key_data *key,
- const void *params)
+ struct key_data *key)
{
krb5_error_code ret;
struct encryption_type *et = _find_enctype(key->key->keytype);
- struct key_type *kt = et->keytype;
+ struct key_type *kt;
+
+ if (et == NULL) {
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ key->key->keytype);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+
+ kt = et->keytype;
if(kt->schedule == NULL)
return 0;
return 0;
ALLOC(key->schedule, 1);
if(key->schedule == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
ret = krb5_data_alloc(key->schedule, kt->schedule_size);
key->schedule = NULL;
return ret;
}
- (*kt->schedule)(context, key, params);
+ (*kt->schedule)(context, kt, key);
return 0;
}
* *
************************************************************/
-static void
+static krb5_error_code
NONE_checksum(krb5_context context,
struct key_data *key,
const void *data,
unsigned usage,
Checksum *C)
{
+ return 0;
}
-static void
+#if defined(DES3_OLD_ENCTYPE) || defined(HEIM_WEAK_CRYPTO)
+
+static krb5_error_code
+des_checksum(krb5_context context,
+ const EVP_MD *evp_md,
+ struct key_data *key,
+ const void *data,
+ size_t len,
+ Checksum *cksum)
+{
+ struct evp_schedule *ctx = key->schedule->data;
+ EVP_MD_CTX *m;
+ DES_cblock ivec;
+ unsigned char *p = cksum->checksum.data;
+
+ krb5_generate_random_block(p, 8);
+
+ m = EVP_MD_CTX_create();
+ if (m == NULL) {
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ EVP_DigestInit_ex(m, evp_md, NULL);
+ EVP_DigestUpdate(m, p, 8);
+ EVP_DigestUpdate(m, data, len);
+ EVP_DigestFinal_ex (m, p + 8, NULL);
+ EVP_MD_CTX_destroy(m);
+ memset (&ivec, 0, sizeof(ivec));
+ EVP_CipherInit_ex(&ctx->ectx, NULL, NULL, NULL, (void *)&ivec, -1);
+ EVP_Cipher(&ctx->ectx, p, p, 24);
+
+ return 0;
+}
+
+static krb5_error_code
+des_verify(krb5_context context,
+ const EVP_MD *evp_md,
+ struct key_data *key,
+ const void *data,
+ size_t len,
+ Checksum *C)
+{
+ struct evp_schedule *ctx = key->schedule->data;
+ EVP_MD_CTX *m;
+ unsigned char tmp[24];
+ unsigned char res[16];
+ DES_cblock ivec;
+ krb5_error_code ret = 0;
+
+ m = EVP_MD_CTX_create();
+ if (m == NULL) {
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ memset(&ivec, 0, sizeof(ivec));
+ EVP_CipherInit_ex(&ctx->dctx, NULL, NULL, NULL, (void *)&ivec, -1);
+ EVP_Cipher(&ctx->dctx, tmp, C->checksum.data, 24);
+
+ EVP_DigestInit_ex(m, evp_md, NULL);
+ EVP_DigestUpdate(m, tmp, 8); /* confounder */
+ EVP_DigestUpdate(m, data, len);
+ EVP_DigestFinal_ex (m, res, NULL);
+ EVP_MD_CTX_destroy(m);
+ if(ct_memcmp(res, tmp + 8, sizeof(res)) != 0) {
+ krb5_clear_error_message (context);
+ ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ }
+ memset(tmp, 0, sizeof(tmp));
+ memset(res, 0, sizeof(res));
+ return ret;
+}
+
+#endif
+
+#ifdef HEIM_WEAK_CRYPTO
+
+static krb5_error_code
CRC32_checksum(krb5_context context,
struct key_data *key,
const void *data,
unsigned usage,
Checksum *C)
{
- u_int32_t crc;
+ uint32_t crc;
unsigned char *r = C->checksum.data;
_krb5_crc_init_table ();
crc = _krb5_crc_update (data, len, 0);
r[1] = (crc >> 8) & 0xff;
r[2] = (crc >> 16) & 0xff;
r[3] = (crc >> 24) & 0xff;
+ return 0;
}
-static void
+static krb5_error_code
RSA_MD4_checksum(krb5_context context,
struct key_data *key,
const void *data,
unsigned usage,
Checksum *C)
{
- MD4_CTX m;
-
- MD4_Init (&m);
- MD4_Update (&m, data, len);
- MD4_Final (C->checksum.data, &m);
+ if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md4(), NULL) != 1)
+ krb5_abortx(context, "md4 checksum failed");
+ return 0;
}
-static void
-RSA_MD4_DES_checksum(krb5_context context,
+static krb5_error_code
+RSA_MD4_DES_checksum(krb5_context context,
struct key_data *key,
- const void *data,
- size_t len,
+ const void *data,
+ size_t len,
unsigned usage,
Checksum *cksum)
{
- MD4_CTX md4;
- DES_cblock ivec;
- unsigned char *p = cksum->checksum.data;
-
- krb5_generate_random_block(p, 8);
- MD4_Init (&md4);
- MD4_Update (&md4, p, 8);
- MD4_Update (&md4, data, len);
- MD4_Final (p + 8, &md4);
- memset (&ivec, 0, sizeof(ivec));
- DES_cbc_encrypt(p,
- p,
- 24,
- key->schedule->data,
- &ivec,
- DES_ENCRYPT);
+ return des_checksum(context, EVP_md4(), key, data, len, cksum);
}
static krb5_error_code
unsigned usage,
Checksum *C)
{
- MD4_CTX md4;
- unsigned char tmp[24];
- unsigned char res[16];
- DES_cblock ivec;
- krb5_error_code ret = 0;
-
- memset(&ivec, 0, sizeof(ivec));
- DES_cbc_encrypt(C->checksum.data,
- (void*)tmp,
- C->checksum.length,
- key->schedule->data,
- &ivec,
- DES_DECRYPT);
- MD4_Init (&md4);
- MD4_Update (&md4, tmp, 8); /* confounder */
- MD4_Update (&md4, data, len);
- MD4_Final (res, &md4);
- if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
- krb5_clear_error_string (context);
- ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
- }
- memset(tmp, 0, sizeof(tmp));
- memset(res, 0, sizeof(res));
- return ret;
-}
-
-static void
-RSA_MD5_checksum(krb5_context context,
- struct key_data *key,
- const void *data,
- size_t len,
- unsigned usage,
- Checksum *C)
-{
- MD5_CTX m;
-
- MD5_Init (&m);
- MD5_Update(&m, data, len);
- MD5_Final (C->checksum.data, &m);
+ return des_verify(context, EVP_md5(), key, data, len, C);
}
-static void
+static krb5_error_code
RSA_MD5_DES_checksum(krb5_context context,
struct key_data *key,
const void *data,
unsigned usage,
Checksum *C)
{
- MD5_CTX md5;
- DES_cblock ivec;
- unsigned char *p = C->checksum.data;
-
- krb5_generate_random_block(p, 8);
- MD5_Init (&md5);
- MD5_Update (&md5, p, 8);
- MD5_Update (&md5, data, len);
- MD5_Final (p + 8, &md5);
- memset (&ivec, 0, sizeof(ivec));
- DES_cbc_encrypt(p,
- p,
- 24,
- key->schedule->data,
- &ivec,
- DES_ENCRYPT);
+ return des_checksum(context, EVP_md5(), key, data, len, C);
}
static krb5_error_code
unsigned usage,
Checksum *C)
{
- MD5_CTX md5;
- unsigned char tmp[24];
- unsigned char res[16];
- DES_cblock ivec;
- DES_key_schedule *sched = key->schedule->data;
- krb5_error_code ret = 0;
-
- memset(&ivec, 0, sizeof(ivec));
- DES_cbc_encrypt(C->checksum.data,
- (void*)tmp,
- C->checksum.length,
- &sched[0],
- &ivec,
- DES_DECRYPT);
- MD5_Init (&md5);
- MD5_Update (&md5, tmp, 8); /* confounder */
- MD5_Update (&md5, data, len);
- MD5_Final (res, &md5);
- if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
- krb5_clear_error_string (context);
- ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
- }
- memset(tmp, 0, sizeof(tmp));
- memset(res, 0, sizeof(res));
- return ret;
+ return des_verify(context, EVP_md5(), key, data, len, C);
}
-static void
+#endif /* HEIM_WEAK_CRYPTO */
+
+#ifdef DES3_OLD_ENCTYPE
+static krb5_error_code
RSA_MD5_DES3_checksum(krb5_context context,
struct key_data *key,
const void *data,
unsigned usage,
Checksum *C)
{
- MD5_CTX md5;
- DES_cblock ivec;
- unsigned char *p = C->checksum.data;
- DES_key_schedule *sched = key->schedule->data;
-
- krb5_generate_random_block(p, 8);
- MD5_Init (&md5);
- MD5_Update (&md5, p, 8);
- MD5_Update (&md5, data, len);
- MD5_Final (p + 8, &md5);
- memset (&ivec, 0, sizeof(ivec));
- DES_ede3_cbc_encrypt(p,
- p,
- 24,
- &sched[0], &sched[1], &sched[2],
- &ivec,
- DES_ENCRYPT);
+ return des_checksum(context, EVP_md5(), key, data, len, C);
}
static krb5_error_code
unsigned usage,
Checksum *C)
{
- MD5_CTX md5;
- unsigned char tmp[24];
- unsigned char res[16];
- DES_cblock ivec;
- DES_key_schedule *sched = key->schedule->data;
- krb5_error_code ret = 0;
+ return des_verify(context, EVP_md5(), key, data, len, C);
+}
+#endif
- memset(&ivec, 0, sizeof(ivec));
- DES_ede3_cbc_encrypt(C->checksum.data,
- (void*)tmp,
- C->checksum.length,
- &sched[0], &sched[1], &sched[2],
- &ivec,
- DES_DECRYPT);
- MD5_Init (&md5);
- MD5_Update (&md5, tmp, 8); /* confounder */
- MD5_Update (&md5, data, len);
- MD5_Final (res, &md5);
- if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
- krb5_clear_error_string (context);
- ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
- }
- memset(tmp, 0, sizeof(tmp));
- memset(res, 0, sizeof(res));
- return ret;
-}
-
-static void
+static krb5_error_code
SHA1_checksum(krb5_context context,
struct key_data *key,
const void *data,
unsigned usage,
Checksum *C)
{
- SHA_CTX m;
-
- SHA1_Init(&m);
- SHA1_Update(&m, data, len);
- SHA1_Final(C->checksum.data, &m);
+ if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_sha1(), NULL) != 1)
+ krb5_abortx(context, "sha1 checksum failed");
+ return 0;
}
/* HMAC according to RFC2104 */
static krb5_error_code
hmac(krb5_context context,
- struct checksum_type *cm,
- const void *data,
- size_t len,
+ struct checksum_type *cm,
+ const void *data,
+ size_t len,
unsigned usage,
struct key_data *keyblock,
Checksum *result)
unsigned char *key;
size_t key_len;
int i;
-
+
ipad = malloc(cm->blocksize + len);
if (ipad == NULL)
return ENOMEM;
memset(opad, 0x5c, cm->blocksize);
if(keyblock->key->keyvalue.length > cm->blocksize){
- (*cm->checksum)(context,
- keyblock,
- keyblock->key->keyvalue.data,
- keyblock->key->keyvalue.length,
+ (*cm->checksum)(context,
+ keyblock,
+ keyblock->key->keyvalue.data,
+ keyblock->key->keyvalue.length,
usage,
result);
key = result->checksum.data;
memcpy(ipad + cm->blocksize, data, len);
(*cm->checksum)(context, keyblock, ipad, cm->blocksize + len,
usage, result);
- memcpy(opad + cm->blocksize, result->checksum.data,
+ memcpy(opad + cm->blocksize, result->checksum.data,
result->checksum.length);
- (*cm->checksum)(context, keyblock, opad,
+ (*cm->checksum)(context, keyblock, opad,
cm->blocksize + cm->checksumsize, usage, result);
memset(ipad, 0, cm->blocksize + len);
free(ipad);
krb5_cksumtype cktype,
const void *data,
size_t len,
- unsigned usage,
+ unsigned usage,
krb5_keyblock *key,
Checksum *result)
{
krb5_error_code ret;
if (c == NULL) {
- krb5_set_error_string (context, "checksum type %d not supported",
- cktype);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ cktype);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
krb5_free_data(context, kd.schedule);
return ret;
- }
+}
-static void
+static krb5_error_code
SP_HMAC_SHA1_checksum(krb5_context context,
- struct key_data *key,
- const void *data,
- size_t len,
+ struct key_data *key,
+ const void *data,
+ size_t len,
unsigned usage,
Checksum *result)
{
if (ret)
krb5_abortx(context, "hmac failed");
memcpy(result->checksum.data, res.checksum.data, result->checksum.length);
+ return 0;
}
/*
* checksum according to section 5. of draft-brezak-win2k-krb-rc4-hmac-03.txt
*/
-static void
+static krb5_error_code
HMAC_MD5_checksum(krb5_context context,
struct key_data *key,
const void *data,
unsigned usage,
Checksum *result)
{
- MD5_CTX md5;
+ EVP_MD_CTX *m;
struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
const char signature[] = "signaturekey";
Checksum ksign_c;
unsigned char ksign_c_data[16];
krb5_error_code ret;
+ m = EVP_MD_CTX_create();
+ if (m == NULL) {
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
ksign_c.checksum.length = sizeof(ksign_c_data);
ksign_c.checksum.data = ksign_c_data;
ret = hmac(context, c, signature, sizeof(signature), 0, key, &ksign_c);
- if (ret)
- krb5_abortx(context, "hmac failed");
+ if (ret) {
+ EVP_MD_CTX_destroy(m);
+ return ret;
+ }
ksign.key = &kb;
kb.keyvalue = ksign_c.checksum;
- MD5_Init (&md5);
- t[0] = (usage >> 0) & 0xFF;
- t[1] = (usage >> 8) & 0xFF;
- t[2] = (usage >> 16) & 0xFF;
- t[3] = (usage >> 24) & 0xFF;
- MD5_Update (&md5, t, 4);
- MD5_Update (&md5, data, len);
- MD5_Final (tmp, &md5);
- ret = hmac(context, c, tmp, sizeof(tmp), 0, &ksign, result);
- if (ret)
- krb5_abortx(context, "hmac failed");
-}
-
-/*
- * same as previous but being used while encrypting.
- */
-
-static void
-HMAC_MD5_checksum_enc(krb5_context context,
- struct key_data *key,
- const void *data,
- size_t len,
- unsigned usage,
- Checksum *result)
-{
- struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
- Checksum ksign_c;
- struct key_data ksign;
- krb5_keyblock kb;
- unsigned char t[4];
- unsigned char ksign_c_data[16];
- krb5_error_code ret;
-
+ EVP_DigestInit_ex(m, EVP_md5(), NULL);
t[0] = (usage >> 0) & 0xFF;
t[1] = (usage >> 8) & 0xFF;
t[2] = (usage >> 16) & 0xFF;
t[3] = (usage >> 24) & 0xFF;
+ EVP_DigestUpdate(m, t, 4);
+ EVP_DigestUpdate(m, data, len);
+ EVP_DigestFinal_ex (m, tmp, NULL);
+ EVP_MD_CTX_destroy(m);
- ksign_c.checksum.length = sizeof(ksign_c_data);
- ksign_c.checksum.data = ksign_c_data;
- ret = hmac(context, c, t, sizeof(t), 0, key, &ksign_c);
- if (ret)
- krb5_abortx(context, "hmac failed");
- ksign.key = &kb;
- kb.keyvalue = ksign_c.checksum;
- ret = hmac(context, c, data, len, 0, &ksign, result);
+ ret = hmac(context, c, tmp, sizeof(tmp), 0, &ksign, result);
if (ret)
- krb5_abortx(context, "hmac failed");
+ return ret;
+ return 0;
}
static struct checksum_type checksum_none = {
- CKSUMTYPE_NONE,
- "none",
- 1,
- 0,
+ CKSUMTYPE_NONE,
+ "none",
+ 1,
+ 0,
0,
- NONE_checksum,
+ NONE_checksum,
NULL
};
+#ifdef HEIM_WEAK_CRYPTO
static struct checksum_type checksum_crc32 = {
CKSUMTYPE_CRC32,
"crc32",
RSA_MD4_DES_checksum,
RSA_MD4_DES_verify
};
-#if 0
-static struct checksum_type checksum_des_mac = {
- CKSUMTYPE_DES_MAC,
- "des-mac",
- 0,
- 0,
- 0,
- DES_MAC_checksum
-};
-static struct checksum_type checksum_des_mac_k = {
- CKSUMTYPE_DES_MAC_K,
- "des-mac-k",
- 0,
- 0,
- 0,
- DES_MAC_K_checksum
-};
-static struct checksum_type checksum_rsa_md4_des_k = {
- CKSUMTYPE_RSA_MD4_DES_K,
- "rsa-md4-des-k",
- 0,
- 0,
- 0,
- RSA_MD4_DES_K_checksum,
- RSA_MD4_DES_K_verify
+static struct checksum_type checksum_rsa_md5_des = {
+ CKSUMTYPE_RSA_MD5_DES,
+ "rsa-md5-des",
+ 64,
+ 24,
+ F_KEYED | F_CPROOF | F_VARIANT,
+ RSA_MD5_DES_checksum,
+ RSA_MD5_DES_verify
};
-#endif
+#endif /* HEIM_WEAK_CRYPTO */
+
+static krb5_error_code
+RSA_MD5_checksum(krb5_context context,
+ struct key_data *key,
+ const void *data,
+ size_t len,
+ unsigned usage,
+ Checksum *C)
+{
+ if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md5(), NULL) != 1)
+ krb5_abortx(context, "md5 checksum failed");
+ return 0;
+}
+
static struct checksum_type checksum_rsa_md5 = {
CKSUMTYPE_RSA_MD5,
"rsa-md5",
RSA_MD5_checksum,
NULL
};
-static struct checksum_type checksum_rsa_md5_des = {
- CKSUMTYPE_RSA_MD5_DES,
- "rsa-md5-des",
- 64,
- 24,
- F_KEYED | F_CPROOF | F_VARIANT,
- RSA_MD5_DES_checksum,
- RSA_MD5_DES_verify
-};
+
+#ifdef DES3_OLD_ENCTYPE
static struct checksum_type checksum_rsa_md5_des3 = {
CKSUMTYPE_RSA_MD5_DES3,
"rsa-md5-des3",
RSA_MD5_DES3_checksum,
RSA_MD5_DES3_verify
};
+#endif
static struct checksum_type checksum_sha1 = {
CKSUMTYPE_SHA1,
"sha1",
NULL
};
-static struct checksum_type checksum_hmac_md5_enc = {
- CKSUMTYPE_HMAC_MD5_ENC,
- "hmac-md5-enc",
- 64,
- 16,
- F_KEYED | F_CPROOF | F_PSEUDO,
- HMAC_MD5_checksum_enc,
- NULL
-};
-
static struct checksum_type *checksum_types[] = {
&checksum_none,
+#ifdef HEIM_WEAK_CRYPTO
&checksum_crc32,
&checksum_rsa_md4,
&checksum_rsa_md4_des,
-#if 0
- &checksum_des_mac,
- &checksum_des_mac_k,
- &checksum_rsa_md4_des_k,
-#endif
- &checksum_rsa_md5,
&checksum_rsa_md5_des,
+#endif
+#ifdef DES3_OLD_ENCTYPE
&checksum_rsa_md5_des3,
+#endif
+ &checksum_rsa_md5,
&checksum_sha1,
&checksum_hmac_sha1_des3,
&checksum_hmac_sha1_aes128,
&checksum_hmac_sha1_aes256,
- &checksum_hmac_md5,
- &checksum_hmac_md5_enc
+ &checksum_hmac_md5
};
static int num_checksums = sizeof(checksum_types) / sizeof(checksum_types[0]);
}
static krb5_error_code
-get_checksum_key(krb5_context context,
+get_checksum_key(krb5_context context,
krb5_crypto crypto,
unsigned usage, /* not krb5_key_usage */
- struct checksum_type *ct,
+ struct checksum_type *ct,
struct key_data **key)
{
krb5_error_code ret = 0;
*key = _new_derived_key(crypto, 0xff/* KRB5_KU_RFC1510_VARIANT */);
if(*key == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
ret = krb5_copy_keyblock(context, crypto->key.key, &(*key)->key);
- if(ret)
+ if(ret)
return ret;
for(i = 0; i < (*key)->key->keyvalue.length; i++)
((unsigned char*)(*key)->key->keyvalue.data)[i] ^= 0xF0;
} else {
- *key = &crypto->key;
+ *key = &crypto->key;
}
if(ret == 0)
- ret = _key_schedule(context, *key, crypto->params);
+ ret = _key_schedule(context, *key);
return ret;
}
krb5_error_code ret;
struct key_data *dkey;
int keyed_checksum;
-
+
if (ct->flags & F_DISABLED) {
- krb5_clear_error_string (context);
+ krb5_clear_error_message (context);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
keyed_checksum = (ct->flags & F_KEYED) != 0;
if(keyed_checksum && crypto == NULL) {
- krb5_clear_error_string (context);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("Checksum type %s is keyed but no "
+ "crypto context (key) was passed in", ""),
+ ct->name);
return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
}
if(keyed_checksum) {
} else
dkey = NULL;
result->cksumtype = ct->type;
- krb5_data_alloc(&result->checksum, ct->checksumsize);
- (*ct->checksum)(context, dkey, data, len, usage, result);
- return 0;
+ ret = krb5_data_alloc(&result->checksum, ct->checksumsize);
+ if (ret)
+ return (ret);
+ return (*ct->checksum)(context, dkey, data, len, usage, result);
}
static int
}
if(ct == NULL) {
- krb5_set_error_string (context, "checksum type %d not supported",
- type);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ type);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
ct = _find_checksum(cksum->cksumtype);
if (ct == NULL || (ct->flags & F_DISABLED)) {
- krb5_set_error_string (context, "checksum type %d not supported",
- cksum->cksumtype);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ cksum->cksumtype);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
if(ct->checksumsize != cksum->checksum.length) {
- krb5_clear_error_string (context);
+ krb5_clear_error_message (context);
return KRB5KRB_AP_ERR_BAD_INTEGRITY; /* XXX */
}
keyed_checksum = (ct->flags & F_KEYED) != 0;
- if(keyed_checksum && crypto == NULL) {
- krb5_clear_error_string (context);
- return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
- }
- if(keyed_checksum)
+ if(keyed_checksum) {
+ struct checksum_type *kct;
+ if (crypto == NULL) {
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("Checksum type %s is keyed but no "
+ "crypto context (key) was passed in", ""),
+ ct->name);
+ return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
+ }
+ kct = crypto->et->keyed_checksum;
+ if (kct != NULL && kct->type != ct->type) {
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("Checksum type %s is keyed, but "
+ "the key type %s passed didnt have that checksum "
+ "type as the keyed type", ""),
+ ct->name, crypto->et->name);
+ return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
+ }
+
ret = get_checksum_key(context, crypto, usage, ct, &dkey);
- else
+ if (ret)
+ return ret;
+ } else
dkey = NULL;
if(ct->verify)
return (*ct->verify)(context, dkey, data, len, usage, cksum);
if (ret)
return ret;
- (*ct->checksum)(context, dkey, data, len, usage, &c);
+ ret = (*ct->checksum)(context, dkey, data, len, usage, &c);
+ if (ret) {
+ krb5_data_free(&c.checksum);
+ return ret;
+ }
- if(c.checksum.length != cksum->checksum.length ||
- memcmp(c.checksum.data, cksum->checksum.data, c.checksum.length)) {
- krb5_clear_error_string (context);
+ if(c.checksum.length != cksum->checksum.length ||
+ ct_memcmp(c.checksum.data, cksum->checksum.data, c.checksum.length)) {
+ krb5_clear_error_message (context);
ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
} else {
ret = 0;
krb5_error_code KRB5_LIB_FUNCTION
krb5_verify_checksum(krb5_context context,
krb5_crypto crypto,
- krb5_key_usage usage,
+ krb5_key_usage usage,
void *data,
size_t len,
Checksum *cksum)
ct = _find_checksum(cksum->cksumtype);
if(ct == NULL) {
- krb5_set_error_string (context, "checksum type %d not supported",
- cksum->cksumtype);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ cksum->cksumtype);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
krb5_cksumtype *type)
{
struct checksum_type *ct = NULL;
-
+
if (crypto != NULL) {
ct = crypto->et->keyed_checksum;
if (ct == NULL)
ct = crypto->et->checksum;
}
-
+
if (ct == NULL) {
- krb5_set_error_string (context, "checksum type not found");
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type not found", ""));
return KRB5_PROG_SUMTYPE_NOSUPP;
- }
+ }
*type = ct->type;
-
- return 0;
+
+ return 0;
}
{
struct checksum_type *ct = _find_checksum(type);
if(ct == NULL) {
- krb5_set_error_string (context, "checksum type %d not supported",
- type);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ type);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
*size = ct->checksumsize;
struct checksum_type *ct = _find_checksum(type);
if(ct == NULL) {
if (context)
- krb5_set_error_string (context, "checksum type %d not supported",
- type);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ type);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
return ct->flags & F_KEYED;
struct checksum_type *ct = _find_checksum(type);
if(ct == NULL) {
if (context)
- krb5_set_error_string (context, "checksum type %d not supported",
- type);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ type);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
return ct->flags & F_CPROOF;
struct checksum_type *ct = _find_checksum(type);
if(ct == NULL) {
if (context)
- krb5_set_error_string (context, "checksum type %d not supported",
- type);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ type);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
ct->flags |= F_DISABLED;
static krb5_error_code
NULL_encrypt(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
+ struct key_data *key,
+ void *data,
+ size_t len,
krb5_boolean encryptp,
int usage,
void *ivec)
}
static krb5_error_code
-DES_CBC_encrypt_null_ivec(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
+evp_encrypt(krb5_context context,
+ struct key_data *key,
+ void *data,
+ size_t len,
+ krb5_boolean encryptp,
+ int usage,
+ void *ivec)
+{
+ struct evp_schedule *ctx = key->schedule->data;
+ EVP_CIPHER_CTX *c;
+ c = encryptp ? &ctx->ectx : &ctx->dctx;
+ if (ivec == NULL) {
+ /* alloca ? */
+ size_t len = EVP_CIPHER_CTX_iv_length(c);
+ void *loiv = malloc(len);
+ if (loiv == NULL) {
+ krb5_clear_error_message(context);
+ return ENOMEM;
+ }
+ memset(loiv, 0, len);
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, loiv, -1);
+ free(loiv);
+ } else
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, ivec, -1);
+ EVP_Cipher(c, data, data, len);
+ return 0;
+}
+
+static const char zero_ivec[EVP_MAX_BLOCK_LENGTH] = { 0 };
+
+static krb5_error_code
+evp_encrypt_cts(krb5_context context,
+ struct key_data *key,
+ void *data,
+ size_t len,
+ krb5_boolean encryptp,
+ int usage,
+ void *ivec)
+{
+ size_t i, blocksize;
+ struct evp_schedule *ctx = key->schedule->data;
+ char tmp[EVP_MAX_BLOCK_LENGTH], ivec2[EVP_MAX_BLOCK_LENGTH];
+ EVP_CIPHER_CTX *c;
+ unsigned char *p;
+
+ c = encryptp ? &ctx->ectx : &ctx->dctx;
+
+ blocksize = EVP_CIPHER_CTX_block_size(c);
+
+ if (len < blocksize) {
+ krb5_set_error_message(context, EINVAL,
+ "message block too short");
+ return EINVAL;
+ } else if (len == blocksize) {
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
+ EVP_Cipher(c, data, data, len);
+ return 0;
+ }
+
+ if (ivec)
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, ivec, -1);
+ else
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
+
+ if (encryptp) {
+
+ p = data;
+ i = ((len - 1) / blocksize) * blocksize;
+ EVP_Cipher(c, p, p, i);
+ p += i - blocksize;
+ len -= i;
+ memcpy(ivec2, p, blocksize);
+
+ for (i = 0; i < len; i++)
+ tmp[i] = p[i + blocksize] ^ ivec2[i];
+ for (; i < blocksize; i++)
+ tmp[i] = 0 ^ ivec2[i];
+
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
+ EVP_Cipher(c, p, tmp, blocksize);
+
+ memcpy(p + blocksize, ivec2, len);
+ if (ivec)
+ memcpy(ivec, p, blocksize);
+ } else {
+ char tmp2[EVP_MAX_BLOCK_LENGTH], tmp3[EVP_MAX_BLOCK_LENGTH];
+
+ p = data;
+ if (len > blocksize * 2) {
+ /* remove last two blocks and round up, decrypt this with cbc, then do cts dance */
+ i = ((((len - blocksize * 2) + blocksize - 1) / blocksize) * blocksize);
+ memcpy(ivec2, p + i - blocksize, blocksize);
+ EVP_Cipher(c, p, p, i);
+ p += i;
+ len -= i + blocksize;
+ } else {
+ if (ivec)
+ memcpy(ivec2, ivec, blocksize);
+ else
+ memcpy(ivec2, zero_ivec, blocksize);
+ len -= blocksize;
+ }
+
+ memcpy(tmp, p, blocksize);
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
+ EVP_Cipher(c, tmp2, p, blocksize);
+
+ memcpy(tmp3, p + blocksize, len);
+ memcpy(tmp3 + len, tmp2 + len, blocksize - len); /* xor 0 */
+
+ for (i = 0; i < len; i++)
+ p[i + blocksize] = tmp2[i] ^ tmp3[i];
+
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
+ EVP_Cipher(c, p, tmp3, blocksize);
+
+ for (i = 0; i < blocksize; i++)
+ p[i] ^= ivec2[i];
+ if (ivec)
+ memcpy(ivec, tmp, blocksize);
+ }
+ return 0;
+}
+
+#ifdef HEIM_WEAK_CRYPTO
+static krb5_error_code
+evp_des_encrypt_null_ivec(krb5_context context,
+ struct key_data *key,
+ void *data,
+ size_t len,
krb5_boolean encryptp,
int usage,
void *ignore_ivec)
{
+ struct evp_schedule *ctx = key->schedule->data;
+ EVP_CIPHER_CTX *c;
DES_cblock ivec;
- DES_key_schedule *s = key->schedule->data;
memset(&ivec, 0, sizeof(ivec));
- DES_cbc_encrypt(data, data, len, s, &ivec, encryptp);
+ c = encryptp ? &ctx->ectx : &ctx->dctx;
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
+ EVP_Cipher(c, data, data, len);
return 0;
}
static krb5_error_code
-DES_CBC_encrypt_key_ivec(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
+evp_des_encrypt_key_ivec(krb5_context context,
+ struct key_data *key,
+ void *data,
+ size_t len,
krb5_boolean encryptp,
int usage,
void *ignore_ivec)
{
+ struct evp_schedule *ctx = key->schedule->data;
+ EVP_CIPHER_CTX *c;
DES_cblock ivec;
- DES_key_schedule *s = key->schedule->data;
memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
- DES_cbc_encrypt(data, data, len, s, &ivec, encryptp);
- return 0;
-}
-
-static krb5_error_code
-DES3_CBC_encrypt(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
- krb5_boolean encryptp,
- int usage,
- void *ivec)
-{
- DES_cblock local_ivec;
- DES_key_schedule *s = key->schedule->data;
- if(ivec == NULL) {
- ivec = &local_ivec;
- memset(local_ivec, 0, sizeof(local_ivec));
- }
- DES_ede3_cbc_encrypt(data, data, len, &s[0], &s[1], &s[2], ivec, encryptp);
+ c = encryptp ? &ctx->ectx : &ctx->dctx;
+ EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
+ EVP_Cipher(c, data, data, len);
return 0;
}
static krb5_error_code
DES_CFB64_encrypt_null_ivec(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
+ struct key_data *key,
+ void *data,
+ size_t len,
krb5_boolean encryptp,
int usage,
void *ignore_ivec)
static krb5_error_code
DES_PCBC_encrypt_key_ivec(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
+ struct key_data *key,
+ void *data,
+ size_t len,
krb5_boolean encryptp,
int usage,
void *ignore_ivec)
DES_pcbc_encrypt(data, data, len, s, &ivec, encryptp);
return 0;
}
+#endif
/*
- * AES draft-raeburn-krb-rijndael-krb-02
+ * section 6 of draft-brezak-win2k-krb-rc4-hmac-03
+ *
+ * warning: not for small children
*/
-void KRB5_LIB_FUNCTION
-_krb5_aes_cts_encrypt(const unsigned char *in, unsigned char *out,
- size_t len, const void *aes_key,
- unsigned char *ivec, const int encryptp)
+static krb5_error_code
+ARCFOUR_subencrypt(krb5_context context,
+ struct key_data *key,
+ void *data,
+ size_t len,
+ unsigned usage,
+ void *ivec)
{
- unsigned char tmp[AES_BLOCK_SIZE];
- const AES_KEY *key = aes_key; /* XXX remove this when we always have AES */
- int i;
+ EVP_CIPHER_CTX ctx;
+ struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
+ Checksum k1_c, k2_c, k3_c, cksum;
+ struct key_data ke;
+ krb5_keyblock kb;
+ unsigned char t[4];
+ unsigned char *cdata = data;
+ unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
+ krb5_error_code ret;
- /*
- * In the framework of kerberos, the length can never be shorter
- * then at least one blocksize.
- */
+ t[0] = (usage >> 0) & 0xFF;
+ t[1] = (usage >> 8) & 0xFF;
+ t[2] = (usage >> 16) & 0xFF;
+ t[3] = (usage >> 24) & 0xFF;
- if (encryptp) {
+ k1_c.checksum.length = sizeof(k1_c_data);
+ k1_c.checksum.data = k1_c_data;
- while(len > AES_BLOCK_SIZE) {
- for (i = 0; i < AES_BLOCK_SIZE; i++)
- tmp[i] = in[i] ^ ivec[i];
- AES_encrypt(tmp, out, key);
- memcpy(ivec, out, AES_BLOCK_SIZE);
- len -= AES_BLOCK_SIZE;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
+ ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
+ if (ret)
+ krb5_abortx(context, "hmac failed");
- for (i = 0; i < len; i++)
- tmp[i] = in[i] ^ ivec[i];
- for (; i < AES_BLOCK_SIZE; i++)
- tmp[i] = 0 ^ ivec[i];
+ memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
- AES_encrypt(tmp, out - AES_BLOCK_SIZE, key);
+ k2_c.checksum.length = sizeof(k2_c_data);
+ k2_c.checksum.data = k2_c_data;
- memcpy(out, ivec, len);
- memcpy(ivec, out - AES_BLOCK_SIZE, AES_BLOCK_SIZE);
+ ke.key = &kb;
+ kb.keyvalue = k2_c.checksum;
- } else {
- unsigned char tmp2[AES_BLOCK_SIZE];
- unsigned char tmp3[AES_BLOCK_SIZE];
-
- while(len > AES_BLOCK_SIZE * 2) {
- memcpy(tmp, in, AES_BLOCK_SIZE);
- AES_decrypt(in, out, key);
- for (i = 0; i < AES_BLOCK_SIZE; i++)
- out[i] ^= ivec[i];
- memcpy(ivec, tmp, AES_BLOCK_SIZE);
- len -= AES_BLOCK_SIZE;
- in += AES_BLOCK_SIZE;
- out += AES_BLOCK_SIZE;
- }
+ cksum.checksum.length = 16;
+ cksum.checksum.data = data;
- len -= AES_BLOCK_SIZE;
+ ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
+ if (ret)
+ krb5_abortx(context, "hmac failed");
- memcpy(tmp, in, AES_BLOCK_SIZE); /* save last iv */
- AES_decrypt(in, tmp2, key);
+ ke.key = &kb;
+ kb.keyvalue = k1_c.checksum;
- memcpy(tmp3, in + AES_BLOCK_SIZE, len);
- memcpy(tmp3 + len, tmp2 + len, AES_BLOCK_SIZE - len); /* xor 0 */
+ k3_c.checksum.length = sizeof(k3_c_data);
+ k3_c.checksum.data = k3_c_data;
- for (i = 0; i < len; i++)
- out[i + AES_BLOCK_SIZE] = tmp2[i] ^ tmp3[i];
+ ret = hmac(NULL, c, data, 16, 0, &ke, &k3_c);
+ if (ret)
+ krb5_abortx(context, "hmac failed");
- AES_decrypt(tmp3, out, key);
- for (i = 0; i < AES_BLOCK_SIZE; i++)
- out[i] ^= ivec[i];
- memcpy(ivec, tmp, AES_BLOCK_SIZE);
- }
-}
-
-static krb5_error_code
-AES_CTS_encrypt(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
- krb5_boolean encryptp,
- int usage,
- void *ivec)
-{
- struct krb5_aes_schedule *aeskey = key->schedule->data;
- char local_ivec[AES_BLOCK_SIZE];
- AES_KEY *k;
-
- if (encryptp)
- k = &aeskey->ekey;
- else
- k = &aeskey->dkey;
-
- if (len < AES_BLOCK_SIZE)
- krb5_abortx(context, "invalid use of AES_CTS_encrypt");
- if (len == AES_BLOCK_SIZE) {
- if (encryptp)
- AES_encrypt(data, data, k);
- else
- AES_decrypt(data, data, k);
- } else {
- if(ivec == NULL) {
- memset(local_ivec, 0, sizeof(local_ivec));
- ivec = local_ivec;
- }
- _krb5_aes_cts_encrypt(data, data, len, k, ivec, encryptp);
- }
-
- return 0;
-}
-
-static krb5_error_code
-AES_CBC_encrypt(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
- krb5_boolean encryptp,
- int usage,
- void *ivec)
-{
- struct krb5_aes_schedule *aeskey = key->schedule->data;
- char local_ivec[AES_BLOCK_SIZE];
- AES_KEY *k;
-
- if (encryptp)
- k = &aeskey->ekey;
- else
- k = &aeskey->dkey;
-
- if(ivec == NULL) {
- ivec = &local_ivec;
- memset(local_ivec, 0, sizeof(local_ivec));
- }
- AES_cbc_encrypt(data, data, len, k, ivec, encryptp);
- return 0;
-}
-
-/*
- * RC2
- */
-
-static krb5_error_code
-RC2_CBC_encrypt(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
- krb5_boolean encryptp,
- int usage,
- void *ivec)
-{
- unsigned char local_ivec[8];
- RC2_KEY *s = key->schedule->data;
- if(ivec == NULL) {
- ivec = &local_ivec;
- memset(local_ivec, 0, sizeof(local_ivec));
- }
- RC2_cbc_encrypt(data, data, len, s, ivec, encryptp);
- return 0;
-}
-
-/*
- * section 6 of draft-brezak-win2k-krb-rc4-hmac-03
- *
- * warning: not for small children
- */
-
-static krb5_error_code
-ARCFOUR_subencrypt(krb5_context context,
- struct key_data *key,
- void *data,
- size_t len,
- unsigned usage,
- void *ivec)
-{
- struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
- Checksum k1_c, k2_c, k3_c, cksum;
- struct key_data ke;
- krb5_keyblock kb;
- unsigned char t[4];
- RC4_KEY rc4_key;
- unsigned char *cdata = data;
- unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
- krb5_error_code ret;
-
- t[0] = (usage >> 0) & 0xFF;
- t[1] = (usage >> 8) & 0xFF;
- t[2] = (usage >> 16) & 0xFF;
- t[3] = (usage >> 24) & 0xFF;
-
- k1_c.checksum.length = sizeof(k1_c_data);
- k1_c.checksum.data = k1_c_data;
-
- ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
- if (ret)
- krb5_abortx(context, "hmac failed");
-
- memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
-
- k2_c.checksum.length = sizeof(k2_c_data);
- k2_c.checksum.data = k2_c_data;
-
- ke.key = &kb;
- kb.keyvalue = k2_c.checksum;
-
- cksum.checksum.length = 16;
- cksum.checksum.data = data;
-
- ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
- if (ret)
- krb5_abortx(context, "hmac failed");
-
- ke.key = &kb;
- kb.keyvalue = k1_c.checksum;
+ EVP_CIPHER_CTX_init(&ctx);
- k3_c.checksum.length = sizeof(k3_c_data);
- k3_c.checksum.data = k3_c_data;
-
- ret = hmac(NULL, c, data, 16, 0, &ke, &k3_c);
- if (ret)
- krb5_abortx(context, "hmac failed");
+ EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, k3_c.checksum.data, NULL, 1);
+ EVP_Cipher(&ctx, cdata + 16, cdata + 16, len - 16);
+ EVP_CIPHER_CTX_cleanup(&ctx);
- RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
- RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
memset (k1_c_data, 0, sizeof(k1_c_data));
memset (k2_c_data, 0, sizeof(k2_c_data));
memset (k3_c_data, 0, sizeof(k3_c_data));
unsigned usage,
void *ivec)
{
+ EVP_CIPHER_CTX ctx;
struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
Checksum k1_c, k2_c, k3_c, cksum;
struct key_data ke;
krb5_keyblock kb;
unsigned char t[4];
- RC4_KEY rc4_key;
unsigned char *cdata = data;
unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
unsigned char cksum_data[16];
if (ret)
krb5_abortx(context, "hmac failed");
- RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
- RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
+ EVP_CIPHER_CTX_init(&ctx);
+ EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, k3_c.checksum.data, NULL, 0);
+ EVP_Cipher(&ctx, cdata + 16, cdata + 16, len - 16);
+ EVP_CIPHER_CTX_cleanup(&ctx);
ke.key = &kb;
kb.keyvalue = k2_c.checksum;
memset (k2_c_data, 0, sizeof(k2_c_data));
memset (k3_c_data, 0, sizeof(k3_c_data));
- if (memcmp (cksum.checksum.data, data, 16) != 0) {
- krb5_clear_error_string (context);
+ if (ct_memcmp (cksum.checksum.data, data, 16) != 0) {
+ krb5_clear_error_message (context);
return KRB5KRB_AP_ERR_BAD_INTEGRITY;
} else {
return 0;
}
+/*
+ *
+ */
+
+static krb5_error_code
+AES_PRF(krb5_context context,
+ krb5_crypto crypto,
+ const krb5_data *in,
+ krb5_data *out)
+{
+ struct checksum_type *ct = crypto->et->checksum;
+ krb5_error_code ret;
+ Checksum result;
+ krb5_keyblock *derived;
+
+ result.cksumtype = ct->type;
+ ret = krb5_data_alloc(&result.checksum, ct->checksumsize);
+ if (ret) {
+ krb5_set_error_message(context, ret, N_("malloc: out memory", ""));
+ return ret;
+ }
+
+ ret = (*ct->checksum)(context, NULL, in->data, in->length, 0, &result);
+ if (ret) {
+ krb5_data_free(&result.checksum);
+ return ret;
+ }
+
+ if (result.checksum.length < crypto->et->blocksize)
+ krb5_abortx(context, "internal prf error");
+
+ derived = NULL;
+ ret = krb5_derive_key(context, crypto->key.key,
+ crypto->et->type, "prf", 3, &derived);
+ if (ret)
+ krb5_abortx(context, "krb5_derive_key");
+
+ ret = krb5_data_alloc(out, crypto->et->blocksize);
+ if (ret)
+ krb5_abortx(context, "malloc failed");
+
+ {
+ const EVP_CIPHER *c = (*crypto->et->keytype->evp)();
+ EVP_CIPHER_CTX ctx;
+
+ EVP_CIPHER_CTX_init(&ctx); /* ivec all zero */
+ EVP_CipherInit_ex(&ctx, c, NULL, derived->keyvalue.data, NULL, 1);
+ EVP_Cipher(&ctx, out->data, result.checksum.data,
+ crypto->et->blocksize);
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ }
+
+ krb5_data_free(&result.checksum);
+ krb5_free_keyblock(context, derived);
+
+ return ret;
+}
+
/*
* these should currently be in reverse preference order.
* (only relevant for !F_PSEUDO) */
static struct encryption_type enctype_null = {
ETYPE_NULL,
"null",
- NULL,
1,
1,
0,
NULL,
F_DISABLED,
NULL_encrypt,
-};
-static struct encryption_type enctype_des_cbc_crc = {
- ETYPE_DES_CBC_CRC,
- "des-cbc-crc",
- NULL,
- 8,
- 8,
- 8,
- &keytype_des,
- &checksum_crc32,
- NULL,
- 0,
- DES_CBC_encrypt_key_ivec,
-};
-static struct encryption_type enctype_des_cbc_md4 = {
- ETYPE_DES_CBC_MD4,
- "des-cbc-md4",
- NULL,
- 8,
- 8,
- 8,
- &keytype_des,
- &checksum_rsa_md4,
- &checksum_rsa_md4_des,
- 0,
- DES_CBC_encrypt_null_ivec,
-};
-static struct encryption_type enctype_des_cbc_md5 = {
- ETYPE_DES_CBC_MD5,
- "des-cbc-md5",
- NULL,
- 8,
- 8,
- 8,
- &keytype_des,
- &checksum_rsa_md5,
- &checksum_rsa_md5_des,
0,
- DES_CBC_encrypt_null_ivec,
+ NULL
};
static struct encryption_type enctype_arcfour_hmac_md5 = {
ETYPE_ARCFOUR_HMAC_MD5,
"arcfour-hmac-md5",
- NULL,
1,
1,
8,
&checksum_hmac_md5,
NULL,
F_SPECIAL,
- ARCFOUR_encrypt
+ ARCFOUR_encrypt,
+ 0,
+ NULL
};
-static struct encryption_type enctype_des3_cbc_md5 = {
+#ifdef DES3_OLD_ENCTYPE
+static struct encryption_type enctype_des3_cbc_md5 = {
ETYPE_DES3_CBC_MD5,
"des3-cbc-md5",
- NULL,
8,
8,
8,
&checksum_rsa_md5,
&checksum_rsa_md5_des3,
0,
- DES3_CBC_encrypt,
+ evp_encrypt,
+ 0,
+ NULL
};
+#endif
static struct encryption_type enctype_des3_cbc_sha1 = {
ETYPE_DES3_CBC_SHA1,
"des3-cbc-sha1",
- NULL,
8,
8,
8,
&checksum_sha1,
&checksum_hmac_sha1_des3,
F_DERIVED,
- DES3_CBC_encrypt,
+ evp_encrypt,
+ 0,
+ NULL
};
+#ifdef DES3_OLD_ENCTYPE
static struct encryption_type enctype_old_des3_cbc_sha1 = {
ETYPE_OLD_DES3_CBC_SHA1,
"old-des3-cbc-sha1",
- NULL,
8,
8,
8,
&checksum_sha1,
&checksum_hmac_sha1_des3,
0,
- DES3_CBC_encrypt,
+ evp_encrypt,
+ 0,
+ NULL
};
+#endif
static struct encryption_type enctype_aes128_cts_hmac_sha1 = {
ETYPE_AES128_CTS_HMAC_SHA1_96,
"aes128-cts-hmac-sha1-96",
- NULL,
16,
1,
16,
&checksum_sha1,
&checksum_hmac_sha1_aes128,
F_DERIVED,
- AES_CTS_encrypt,
+ evp_encrypt_cts,
+ 16,
+ AES_PRF
};
static struct encryption_type enctype_aes256_cts_hmac_sha1 = {
ETYPE_AES256_CTS_HMAC_SHA1_96,
"aes256-cts-hmac-sha1-96",
- NULL,
16,
1,
16,
&checksum_sha1,
&checksum_hmac_sha1_aes256,
F_DERIVED,
- AES_CTS_encrypt,
-};
-static unsigned aes_128_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 2 };
-static heim_oid aes_128_cbc_oid = kcrypto_oid_enc(aes_128_cbc_num);
-static struct encryption_type enctype_aes128_cbc_none = {
- ETYPE_AES128_CBC_NONE,
- "aes128-cbc-none",
- &aes_128_cbc_oid,
- 16,
+ evp_encrypt_cts,
16,
- 16,
- &keytype_aes128,
- &checksum_none,
- NULL,
- F_PSEUDO|F_PADCMS,
- AES_CBC_encrypt,
+ AES_PRF
};
-static unsigned aes_192_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 22 };
-static heim_oid aes_192_cbc_oid = kcrypto_oid_enc(aes_192_cbc_num);
-static struct encryption_type enctype_aes192_cbc_none = {
- ETYPE_AES192_CBC_NONE,
- "aes192-cbc-none",
- &aes_192_cbc_oid,
- 16,
- 16,
- 16,
- &keytype_aes192,
+static struct encryption_type enctype_des3_cbc_none = {
+ ETYPE_DES3_CBC_NONE,
+ "des3-cbc-none",
+ 8,
+ 8,
+ 0,
+ &keytype_des3_derived,
&checksum_none,
NULL,
- F_PSEUDO|F_PADCMS,
- AES_CBC_encrypt,
+ F_PSEUDO,
+ evp_encrypt,
+ 0,
+ NULL
};
-static unsigned aes_256_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 42 };
-static heim_oid aes_256_cbc_oid = kcrypto_oid_enc(aes_256_cbc_num);
-static struct encryption_type enctype_aes256_cbc_none = {
- ETYPE_AES256_CBC_NONE,
- "aes256-cbc-none",
- &aes_256_cbc_oid,
- 16,
- 16,
- 16,
- &keytype_aes256,
- &checksum_none,
+#ifdef HEIM_WEAK_CRYPTO
+static struct encryption_type enctype_des_cbc_crc = {
+ ETYPE_DES_CBC_CRC,
+ "des-cbc-crc",
+ 8,
+ 8,
+ 8,
+ &keytype_des,
+ &checksum_crc32,
NULL,
- F_PSEUDO|F_PADCMS,
- AES_CBC_encrypt,
+ F_DISABLED,
+ evp_des_encrypt_key_ivec,
+ 0,
+ NULL
+};
+static struct encryption_type enctype_des_cbc_md4 = {
+ ETYPE_DES_CBC_MD4,
+ "des-cbc-md4",
+ 8,
+ 8,
+ 8,
+ &keytype_des,
+ &checksum_rsa_md4,
+ &checksum_rsa_md4_des,
+ F_DISABLED,
+ evp_des_encrypt_null_ivec,
+ 0,
+ NULL
+};
+static struct encryption_type enctype_des_cbc_md5 = {
+ ETYPE_DES_CBC_MD5,
+ "des-cbc-md5",
+ 8,
+ 8,
+ 8,
+ &keytype_des,
+ &checksum_rsa_md5,
+ &checksum_rsa_md5_des,
+ F_DISABLED,
+ evp_des_encrypt_null_ivec,
+ 0,
+ NULL
};
static struct encryption_type enctype_des_cbc_none = {
ETYPE_DES_CBC_NONE,
"des-cbc-none",
- NULL,
8,
8,
0,
&keytype_des,
&checksum_none,
NULL,
- F_PSEUDO,
- DES_CBC_encrypt_null_ivec,
+ F_PSEUDO|F_DISABLED,
+ evp_des_encrypt_null_ivec,
+ 0,
+ NULL
};
static struct encryption_type enctype_des_cfb64_none = {
ETYPE_DES_CFB64_NONE,
"des-cfb64-none",
- NULL,
1,
1,
0,
- &keytype_des,
+ &keytype_des_old,
&checksum_none,
NULL,
- F_PSEUDO,
+ F_PSEUDO|F_DISABLED,
DES_CFB64_encrypt_null_ivec,
+ 0,
+ NULL
};
static struct encryption_type enctype_des_pcbc_none = {
ETYPE_DES_PCBC_NONE,
"des-pcbc-none",
- NULL,
8,
8,
0,
- &keytype_des,
+ &keytype_des_old,
&checksum_none,
NULL,
- F_PSEUDO,
+ F_PSEUDO|F_DISABLED,
DES_PCBC_encrypt_key_ivec,
-};
-static unsigned des_ede3_cbc_num[] = { 1, 2, 840, 113549, 3, 7 };
-static heim_oid des_ede3_cbc_oid = kcrypto_oid_enc(des_ede3_cbc_num);
-static struct encryption_type enctype_des3_cbc_none_cms = {
- ETYPE_DES3_CBC_NONE_CMS,
- "des3-cbc-none-cms",
- &des_ede3_cbc_oid,
- 8,
- 8,
0,
- &keytype_des3_derived,
- &checksum_none,
- NULL,
- F_PSEUDO|F_PADCMS,
- DES3_CBC_encrypt,
-};
-static struct encryption_type enctype_des3_cbc_none = {
- ETYPE_DES3_CBC_NONE,
- "des3-cbc-none",
- NULL,
- 8,
- 8,
- 0,
- &keytype_des3_derived,
- &checksum_none,
- NULL,
- F_PSEUDO,
- DES3_CBC_encrypt,
-};
-static unsigned rc2CBC_num[] = { 1, 2, 840, 113549, 3, 2 };
-static heim_oid rc2CBC_oid = kcrypto_oid_enc(rc2CBC_num);
-static struct encryption_type enctype_rc2_cbc_none = {
- ETYPE_RC2_CBC_NONE,
- "rc2-cbc-none",
- &rc2CBC_oid,
- 8,
- 8,
- 0,
- &keytype_rc2,
- &checksum_none,
- NULL,
- F_PSEUDO|F_PADCMS,
- RC2_CBC_encrypt,
+ NULL
};
+#endif /* HEIM_WEAK_CRYPTO */
static struct encryption_type *etypes[] = {
- &enctype_null,
+ &enctype_aes256_cts_hmac_sha1,
+ &enctype_aes128_cts_hmac_sha1,
+ &enctype_des3_cbc_sha1,
+ &enctype_des3_cbc_none, /* used by the gss-api mech */
+ &enctype_arcfour_hmac_md5,
+#ifdef DES3_OLD_ENCTYPE
+ &enctype_des3_cbc_md5,
+ &enctype_old_des3_cbc_sha1,
+#endif
+#ifdef HEIM_WEAK_CRYPTO
&enctype_des_cbc_crc,
&enctype_des_cbc_md4,
&enctype_des_cbc_md5,
- &enctype_arcfour_hmac_md5,
- &enctype_des3_cbc_md5,
- &enctype_des3_cbc_sha1,
- &enctype_old_des3_cbc_sha1,
- &enctype_aes128_cts_hmac_sha1,
- &enctype_aes256_cts_hmac_sha1,
- &enctype_aes128_cbc_none,
- &enctype_aes192_cbc_none,
- &enctype_aes256_cbc_none,
&enctype_des_cbc_none,
&enctype_des_cfb64_none,
&enctype_des_pcbc_none,
- &enctype_des3_cbc_none,
- &enctype_des3_cbc_none_cms,
- &enctype_rc2_cbc_none
+#endif
+ &enctype_null
};
static unsigned num_etypes = sizeof(etypes) / sizeof(etypes[0]);
struct encryption_type *e;
e = _find_enctype(etype);
if(e == NULL) {
- krb5_set_error_string (context, "encryption type %d not supported",
- etype);
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
+ *string = NULL;
return KRB5_PROG_ETYPE_NOSUPP;
}
*string = strdup(e->name);
if(*string == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
return 0;
*etype = etypes[i]->type;
return 0;
}
- krb5_set_error_string (context, "encryption type %s not supported",
- string);
- return KRB5_PROG_ETYPE_NOSUPP;
-}
-
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_enctype_to_oid(krb5_context context,
- krb5_enctype etype,
- heim_oid *oid)
-{
- struct encryption_type *et = _find_enctype(etype);
- if(et == NULL) {
- krb5_set_error_string (context, "encryption type %d not supported",
- etype);
- return KRB5_PROG_ETYPE_NOSUPP;
- }
- if(et->oid == NULL) {
- krb5_set_error_string (context, "%s have not oid", et->name);
- return KRB5_PROG_ETYPE_NOSUPP;
- }
- krb5_clear_error_string(context);
- return copy_oid(et->oid, oid);
-}
-
-krb5_error_code KRB5_LIB_FUNCTION
-_krb5_oid_to_enctype(krb5_context context,
- const heim_oid *oid,
- krb5_enctype *etype)
-{
- int i;
- for(i = 0; i < num_etypes; i++) {
- if(etypes[i]->oid && heim_oid_cmp(etypes[i]->oid, oid) == 0) {
- *etype = etypes[i]->type;
- return 0;
- }
- }
- krb5_set_error_string(context, "enctype for oid not supported");
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %s not supported", ""),
+ string);
return KRB5_PROG_ETYPE_NOSUPP;
}
{
struct encryption_type *e = _find_enctype(etype);
if(e == NULL) {
- krb5_set_error_string (context, "encryption type %d not supported",
- etype);
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
return KRB5_PROG_ETYPE_NOSUPP;
}
*keytype = e->keytype->type; /* XXX */
return 0;
}
-#if 0
krb5_error_code KRB5_LIB_FUNCTION
-krb5_keytype_to_enctype(krb5_context context,
- krb5_keytype keytype,
- krb5_enctype *etype)
-{
- struct key_type *kt = _find_keytype(keytype);
- krb5_warnx(context, "krb5_keytype_to_enctype(%u)", keytype);
- if(kt == NULL)
- return KRB5_PROG_KEYTYPE_NOSUPP;
- *etype = kt->best_etype;
- return 0;
-}
-#endif
-
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_keytype_to_enctypes (krb5_context context,
- krb5_keytype keytype,
- unsigned *len,
- krb5_enctype **val)
+krb5_enctype_valid(krb5_context context,
+ krb5_enctype etype)
{
- int i;
- unsigned n = 0;
- krb5_enctype *ret;
-
- for (i = num_etypes - 1; i >= 0; --i) {
- if (etypes[i]->keytype->type == keytype
- && !(etypes[i]->flags & F_PSEUDO))
- ++n;
- }
- ret = malloc(n * sizeof(*ret));
- if (ret == NULL && n != 0) {
- krb5_set_error_string(context, "malloc: out of memory");
- return ENOMEM;
+ struct encryption_type *e = _find_enctype(etype);
+ if(e == NULL) {
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
+ return KRB5_PROG_ETYPE_NOSUPP;
}
- n = 0;
- for (i = num_etypes - 1; i >= 0; --i) {
- if (etypes[i]->keytype->type == keytype
- && !(etypes[i]->flags & F_PSEUDO))
- ret[n++] = etypes[i]->type;
+ if (e->flags & F_DISABLED) {
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %s is disabled", ""),
+ e->name);
+ return KRB5_PROG_ETYPE_NOSUPP;
}
- *len = n;
- *val = ret;
return 0;
}
-/*
- * First take the configured list of etypes for `keytype' if available,
- * else, do `krb5_keytype_to_enctypes'.
+/**
+ * Return the coresponding encryption type for a checksum type.
+ *
+ * @param context Kerberos context
+ * @param ctype The checksum type to get the result enctype for
+ * @param etype The returned encryption, when the matching etype is
+ * not found, etype is set to ETYPE_NULL.
+ *
+ * @return Return an error code for an failure or 0 on success.
+ * @ingroup krb5_crypto
*/
+
krb5_error_code KRB5_LIB_FUNCTION
-krb5_keytype_to_enctypes_default (krb5_context context,
- krb5_keytype keytype,
- unsigned *len,
- krb5_enctype **val)
+krb5_cksumtype_to_enctype(krb5_context context,
+ krb5_cksumtype ctype,
+ krb5_enctype *etype)
{
- int i, n;
- krb5_enctype *ret;
+ int i;
- if (keytype != KEYTYPE_DES || context->etypes_des == NULL)
- return krb5_keytype_to_enctypes (context, keytype, len, val);
+ *etype = ETYPE_NULL;
- for (n = 0; context->etypes_des[n]; ++n)
- ;
- ret = malloc (n * sizeof(*ret));
- if (ret == NULL && n != 0) {
- krb5_set_error_string(context, "malloc: out of memory");
- return ENOMEM;
+ for(i = 0; i < num_etypes; i++) {
+ if(etypes[i]->keyed_checksum &&
+ etypes[i]->keyed_checksum->type == ctype)
+ {
+ *etype = etypes[i]->type;
+ return 0;
+ }
}
- for (i = 0; i < n; ++i)
- ret[i] = context->etypes_des[i];
- *len = n;
- *val = ret;
- return 0;
-}
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_enctype_valid(krb5_context context,
- krb5_enctype etype)
-{
- struct encryption_type *e = _find_enctype(etype);
- if(e == NULL) {
- krb5_set_error_string (context, "encryption type %d not supported",
- etype);
- return KRB5_PROG_ETYPE_NOSUPP;
- }
- if (e->flags & F_DISABLED) {
- krb5_set_error_string (context, "encryption type %s is disabled",
- e->name);
- return KRB5_PROG_ETYPE_NOSUPP;
- }
- return 0;
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ (int)ctype);
+ return KRB5_PROG_SUMTYPE_NOSUPP;
}
+
krb5_error_code KRB5_LIB_FUNCTION
-krb5_cksumtype_valid(krb5_context context,
+krb5_cksumtype_valid(krb5_context context,
krb5_cksumtype ctype)
{
struct checksum_type *c = _find_checksum(ctype);
if (c == NULL) {
- krb5_set_error_string (context, "checksum type %d not supported",
- ctype);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %d not supported", ""),
+ ctype);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
if (c->flags & F_DISABLED) {
- krb5_set_error_string (context, "checksum type %s is disabled",
- c->name);
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ N_("checksum type %s is disabled", ""),
+ c->name);
return KRB5_PROG_SUMTYPE_NOSUPP;
}
return 0;
}
-/* if two enctypes have compatible keys */
-krb5_boolean KRB5_LIB_FUNCTION
-krb5_enctypes_compatible_keys(krb5_context context,
- krb5_enctype etype1,
- krb5_enctype etype2)
-{
- struct encryption_type *e1 = _find_enctype(etype1);
- struct encryption_type *e2 = _find_enctype(etype2);
- return e1 != NULL && e2 != NULL && e1->keytype == e2->keytype;
-}
-
static krb5_boolean
derived_crypto(krb5_context context,
krb5_crypto crypto)
krb5_error_code ret;
struct key_data *dkey;
const struct encryption_type *et = crypto->et;
-
+
checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
sz = et->confoundersize + len;
total_sz = block_sz + checksum_sz;
p = calloc(1, total_sz);
if(p == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
-
+
q = p;
krb5_generate_random_block(q, et->confoundersize); /* XXX */
q += et->confoundersize;
memcpy(q, data, len);
-
- ret = create_checksum(context,
+
+ ret = create_checksum(context,
et->keyed_checksum,
- crypto,
+ crypto,
INTEGRITY_USAGE(usage),
- p,
+ p,
block_sz,
&cksum);
if(ret == 0 && cksum.checksum.length != checksum_sz) {
free_Checksum (&cksum);
- krb5_clear_error_string (context);
+ krb5_clear_error_message (context);
ret = KRB5_CRYPTO_INTERNAL;
}
if(ret)
ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
if(ret)
goto fail;
- ret = _key_schedule(context, dkey, crypto->params);
+ ret = _key_schedule(context, dkey);
if(ret)
goto fail;
-#ifdef CRYPTO_DEBUG
- krb5_crypto_debug(context, 1, block_sz, dkey->key);
-#endif
ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
if (ret)
goto fail;
krb5_data *result,
void *ivec)
{
- size_t sz, block_sz, checksum_sz, padsize = 0;
+ size_t sz, block_sz, checksum_sz;
Checksum cksum;
unsigned char *p, *q;
krb5_error_code ret;
const struct encryption_type *et = crypto->et;
-
+
checksum_sz = CHECKSUMSIZE(et->checksum);
-
+
sz = et->confoundersize + checksum_sz + len;
block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
- if ((et->flags & F_PADCMS) && et->padsize != 1) {
- padsize = et->padsize - (sz % et->padsize);
- if (padsize == et->padsize)
- block_sz += et->padsize;
- }
p = calloc(1, block_sz);
if(p == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
-
+
q = p;
krb5_generate_random_block(q, et->confoundersize); /* XXX */
q += et->confoundersize;
q += checksum_sz;
memcpy(q, data, len);
- ret = create_checksum(context,
+ ret = create_checksum(context,
et->checksum,
crypto,
0,
- p,
+ p,
block_sz,
&cksum);
if(ret == 0 && cksum.checksum.length != checksum_sz) {
- krb5_clear_error_string (context);
+ krb5_clear_error_message (context);
free_Checksum(&cksum);
ret = KRB5_CRYPTO_INTERNAL;
}
goto fail;
memcpy(p + et->confoundersize, cksum.checksum.data, cksum.checksum.length);
free_Checksum(&cksum);
- ret = _key_schedule(context, &crypto->key, crypto->params);
+ ret = _key_schedule(context, &crypto->key);
if(ret)
goto fail;
- if (et->flags & F_PADCMS) {
- int i;
- q = p + len + checksum_sz + et->confoundersize;
- for (i = 0; i < padsize; i++)
- q[i] = padsize;
- }
-#ifdef CRYPTO_DEBUG
- krb5_crypto_debug(context, 1, block_sz, crypto->key.key);
-#endif
ret = (*et->encrypt)(context, &crypto->key, p, block_sz, 1, 0, ivec);
if (ret) {
memset(p, 0, block_sz);
tmp = malloc (sz);
if (tmp == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
p = tmp;
struct key_data *dkey;
struct encryption_type *et = crypto->et;
unsigned long l;
-
+
checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
- if (len < checksum_sz) {
- krb5_clear_error_string (context);
- return EINVAL; /* XXX - better error code? */
+ if (len < checksum_sz + et->confoundersize) {
+ krb5_set_error_message(context, KRB5_BAD_MSIZE,
+ N_("Encrypted data shorter then "
+ "checksum + confunder", ""));
+ return KRB5_BAD_MSIZE;
}
if (((len - checksum_sz) % et->padsize) != 0) {
- krb5_clear_error_string(context);
+ krb5_clear_error_message(context);
return KRB5_BAD_MSIZE;
}
p = malloc(len);
if(len != 0 && p == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
memcpy(p, data, len);
free(p);
return ret;
}
- ret = _key_schedule(context, dkey, crypto->params);
+ ret = _key_schedule(context, dkey);
if(ret) {
free(p);
return ret;
}
-#ifdef CRYPTO_DEBUG
- krb5_crypto_debug(context, 0, len, dkey->key);
-#endif
ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
if (ret) {
free(p);
l = len - et->confoundersize;
memmove(p, p + et->confoundersize, l);
result->data = realloc(p, l);
- if(result->data == NULL) {
+ if(result->data == NULL && l != 0) {
free(p);
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
result->length = l;
Checksum cksum;
size_t checksum_sz, l;
struct encryption_type *et = crypto->et;
-
+
if ((len % et->padsize) != 0) {
- krb5_clear_error_string(context);
+ krb5_clear_error_message(context);
return KRB5_BAD_MSIZE;
}
checksum_sz = CHECKSUMSIZE(et->checksum);
p = malloc(len);
if(len != 0 && p == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
memcpy(p, data, len);
-
- ret = _key_schedule(context, &crypto->key, crypto->params);
+
+ ret = _key_schedule(context, &crypto->key);
if(ret) {
free(p);
return ret;
}
-#ifdef CRYPTO_DEBUG
- krb5_crypto_debug(context, 0, len, crypto->key.key);
-#endif
ret = (*et->encrypt)(context, &crypto->key, p, len, 0, 0, ivec);
if (ret) {
free(p);
l = len - et->confoundersize - checksum_sz;
memmove(p, p + et->confoundersize + checksum_sz, l);
result->data = realloc(p, l);
- if(result->data == NULL) {
+ if(result->data == NULL && l != 0) {
free(p);
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
result->length = l;
krb5_error_code ret;
if ((len % et->padsize) != 0) {
- krb5_clear_error_string(context);
+ krb5_clear_error_message(context);
return KRB5_BAD_MSIZE;
}
p = malloc (len);
if (p == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
memcpy(p, data, len);
-
+
ret = (*et->encrypt)(context, &crypto->key, p, len, FALSE, usage, ivec);
if (ret) {
free(p);
memmove (p, p + cksum_sz + et->confoundersize, sz);
result->data = realloc(p, sz);
- if(result->data == NULL) {
+ if(result->data == NULL && sz != 0) {
free(p);
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
result->length = sz;
return 0;
}
-
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_encrypt_ivec(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- const void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
+static krb5_crypto_iov *
+find_iv(krb5_crypto_iov *data, int num_data, int type)
{
- if(derived_crypto(context, crypto))
- return encrypt_internal_derived(context, crypto, usage,
- data, len, result, ivec);
- else if (special_crypto(context, crypto))
- return encrypt_internal_special (context, crypto, usage,
- data, len, result, ivec);
- else
- return encrypt_internal(context, crypto, data, len, result, ivec);
+ int i;
+ for (i = 0; i < num_data; i++)
+ if (data[i].flags == type)
+ return &data[i];
+ return NULL;
}
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_encrypt(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- const void *data,
- size_t len,
- krb5_data *result)
-{
- return krb5_encrypt_ivec(context, crypto, usage, data, len, result, NULL);
-}
+/**
+ * Inline encrypt a kerberos message
+ *
+ * @param context Kerberos context
+ * @param crypto Kerberos crypto context
+ * @param usage Key usage for this buffer
+ * @param data array of buffers to process
+ * @param num_data length of array
+ * @param ivec initial cbc/cts vector
+ *
+ * @return Return an error code or 0.
+ * @ingroup krb5_crypto
+ *
+ * Kerberos encrypted data look like this:
+ *
+ * 1. KRB5_CRYPTO_TYPE_HEADER
+ * 2. array [1,...] KRB5_CRYPTO_TYPE_DATA and array [0,...]
+ * KRB5_CRYPTO_TYPE_SIGN_ONLY in any order, however the receiver
+ * have to aware of the order. KRB5_CRYPTO_TYPE_SIGN_ONLY is
+ * commonly used headers and trailers.
+ * 3. KRB5_CRYPTO_TYPE_PADDING, at least on padsize long if padsize > 1
+ * 4. KRB5_CRYPTO_TYPE_TRAILER
+ */
krb5_error_code KRB5_LIB_FUNCTION
-krb5_encrypt_EncryptedData(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- void *data,
- size_t len,
- int kvno,
- EncryptedData *result)
+krb5_encrypt_iov_ivec(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ krb5_crypto_iov *data,
+ int num_data,
+ void *ivec)
{
- result->etype = CRYPTO_ETYPE(crypto);
- if(kvno){
- ALLOC(result->kvno, 1);
- *result->kvno = kvno;
- }else
- result->kvno = NULL;
- return krb5_encrypt(context, crypto, usage, data, len, &result->cipher);
-}
+ size_t headersz, trailersz, len;
+ int i;
+ size_t sz, block_sz, pad_sz;
+ Checksum cksum;
+ unsigned char *p, *q;
+ krb5_error_code ret;
+ struct key_data *dkey;
+ const struct encryption_type *et = crypto->et;
+ krb5_crypto_iov *tiv, *piv, *hiv;
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_decrypt_ivec(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- if(derived_crypto(context, crypto))
- return decrypt_internal_derived(context, crypto, usage,
- data, len, result, ivec);
- else if (special_crypto (context, crypto))
- return decrypt_internal_special(context, crypto, usage,
- data, len, result, ivec);
- else
- return decrypt_internal(context, crypto, data, len, result, ivec);
-}
+ if (num_data < 0) {
+ krb5_clear_error_message(context);
+ return KRB5_CRYPTO_INTERNAL;
+ }
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_decrypt(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- void *data,
- size_t len,
- krb5_data *result)
-{
- return krb5_decrypt_ivec (context, crypto, usage, data, len, result,
- NULL);
-}
+ if(!derived_crypto(context, crypto)) {
+ krb5_clear_error_message(context);
+ return KRB5_CRYPTO_INTERNAL;
+ }
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_decrypt_EncryptedData(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- const EncryptedData *e,
- krb5_data *result)
-{
- return krb5_decrypt(context, crypto, usage,
- e->cipher.data, e->cipher.length, result);
-}
+ headersz = et->confoundersize;
+ trailersz = CHECKSUMSIZE(et->keyed_checksum);
-/************************************************************
- * *
- ************************************************************/
+ for (len = 0, i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
+ continue;
+ len += data[i].data.length;
+ }
-#ifdef HAVE_OPENSSL
-#include <openssl/rand.h>
+ sz = headersz + len;
+ block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
-/* From openssl/crypto/rand/rand_lcl.h */
-#define ENTROPY_NEEDED 20
-static int
-seed_something(void)
-{
- char buf[1024], seedfile[256];
+ pad_sz = block_sz - sz;
- /* If there is a seed file, load it. But such a file cannot be trusted,
- so use 0 for the entropy estimate */
- if (RAND_file_name(seedfile, sizeof(seedfile))) {
- int fd;
- fd = open(seedfile, O_RDONLY);
- if (fd >= 0) {
- ssize_t ret;
- ret = read(fd, buf, sizeof(buf));
+ /* header */
+
+ hiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
+ if (hiv == NULL || hiv->data.length != headersz)
+ return KRB5_BAD_MSIZE;
+
+ krb5_generate_random_block(hiv->data.data, hiv->data.length);
+
+ /* padding */
+ piv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_PADDING);
+ /* its ok to have no TYPE_PADDING if there is no padding */
+ if (piv == NULL && pad_sz != 0)
+ return KRB5_BAD_MSIZE;
+ if (piv) {
+ if (piv->data.length < pad_sz)
+ return KRB5_BAD_MSIZE;
+ piv->data.length = pad_sz;
+ if (pad_sz)
+ memset(piv->data.data, pad_sz, pad_sz);
+ else
+ piv = NULL;
+ }
+
+ /* trailer */
+ tiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_TRAILER);
+ if (tiv == NULL || tiv->data.length != trailersz)
+ return KRB5_BAD_MSIZE;
+
+ /*
+ * XXX replace with EVP_Sign? at least make create_checksum an iov
+ * function.
+ * XXX CTS EVP is broken, can't handle multi buffers :(
+ */
+
+ len = block_sz;
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
+ continue;
+ len += data[i].data.length;
+ }
+
+ p = q = malloc(len);
+
+ memcpy(q, hiv->data.data, hiv->data.length);
+ q += hiv->data.length;
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
+ data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
+ continue;
+ memcpy(q, data[i].data.data, data[i].data.length);
+ q += data[i].data.length;
+ }
+ if (piv)
+ memset(q, 0, piv->data.length);
+
+ ret = create_checksum(context,
+ et->keyed_checksum,
+ crypto,
+ INTEGRITY_USAGE(usage),
+ p,
+ len,
+ &cksum);
+ free(p);
+ if(ret == 0 && cksum.checksum.length != trailersz) {
+ free_Checksum (&cksum);
+ krb5_clear_error_message (context);
+ ret = KRB5_CRYPTO_INTERNAL;
+ }
+ if(ret)
+ return ret;
+
+ /* save cksum at end */
+ memcpy(tiv->data.data, cksum.checksum.data, cksum.checksum.length);
+ free_Checksum (&cksum);
+
+ /* XXX replace with EVP_Cipher */
+ p = q = malloc(block_sz);
+ if(p == NULL)
+ return ENOMEM;
+
+ memcpy(q, hiv->data.data, hiv->data.length);
+ q += hiv->data.length;
+
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
+ continue;
+ memcpy(q, data[i].data.data, data[i].data.length);
+ q += data[i].data.length;
+ }
+ if (piv)
+ memset(q, 0, piv->data.length);
+
+
+ ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
+ if(ret) {
+ free(p);
+ return ret;
+ }
+ ret = _key_schedule(context, dkey);
+ if(ret) {
+ free(p);
+ return ret;
+ }
+
+ ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
+ if (ret) {
+ free(p);
+ return ret;
+ }
+
+ /* now copy data back to buffers */
+ q = p;
+
+ memcpy(hiv->data.data, q, hiv->data.length);
+ q += hiv->data.length;
+
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
+ continue;
+ memcpy(data[i].data.data, q, data[i].data.length);
+ q += data[i].data.length;
+ }
+ if (piv)
+ memcpy(piv->data.data, q, pad_sz);
+
+ free(p);
+
+ return ret;
+}
+
+/**
+ * Inline decrypt a Kerberos message.
+ *
+ * @param context Kerberos context
+ * @param crypto Kerberos crypto context
+ * @param usage Key usage for this buffer
+ * @param data array of buffers to process
+ * @param num_data length of array
+ * @param ivec initial cbc/cts vector
+ *
+ * @return Return an error code or 0.
+ * @ingroup krb5_crypto
+ *
+ * 1. KRB5_CRYPTO_TYPE_HEADER
+ * 2. one KRB5_CRYPTO_TYPE_DATA and array [0,...] of KRB5_CRYPTO_TYPE_SIGN_ONLY in
+ * any order, however the receiver have to aware of the
+ * order. KRB5_CRYPTO_TYPE_SIGN_ONLY is commonly used unencrypoted
+ * protocol headers and trailers. The output data will be of same
+ * size as the input data or shorter.
+ */
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_decrypt_iov_ivec(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ krb5_crypto_iov *data,
+ unsigned int num_data,
+ void *ivec)
+{
+ unsigned int i;
+ size_t headersz, trailersz, len;
+ Checksum cksum;
+ unsigned char *p, *q;
+ krb5_error_code ret;
+ struct key_data *dkey;
+ struct encryption_type *et = crypto->et;
+ krb5_crypto_iov *tiv, *hiv;
+
+ if (num_data < 0) {
+ krb5_clear_error_message(context);
+ return KRB5_CRYPTO_INTERNAL;
+ }
+
+ if(!derived_crypto(context, crypto)) {
+ krb5_clear_error_message(context);
+ return KRB5_CRYPTO_INTERNAL;
+ }
+
+ headersz = et->confoundersize;
+
+ hiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
+ if (hiv == NULL || hiv->data.length != headersz)
+ return KRB5_BAD_MSIZE;
+
+ /* trailer */
+ trailersz = CHECKSUMSIZE(et->keyed_checksum);
+
+ tiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_TRAILER);
+ if (tiv->data.length != trailersz)
+ return KRB5_BAD_MSIZE;
+
+ /* Find length of data we will decrypt */
+
+ len = headersz;
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
+ continue;
+ len += data[i].data.length;
+ }
+
+ if ((len % et->padsize) != 0) {
+ krb5_clear_error_message(context);
+ return KRB5_BAD_MSIZE;
+ }
+
+ /* XXX replace with EVP_Cipher */
+
+ p = q = malloc(len);
+ if (p == NULL)
+ return ENOMEM;
+
+ memcpy(q, hiv->data.data, hiv->data.length);
+ q += hiv->data.length;
+
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
+ continue;
+ memcpy(q, data[i].data.data, data[i].data.length);
+ q += data[i].data.length;
+ }
+
+ ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
+ if(ret) {
+ free(p);
+ return ret;
+ }
+ ret = _key_schedule(context, dkey);
+ if(ret) {
+ free(p);
+ return ret;
+ }
+
+ ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
+ if (ret) {
+ free(p);
+ return ret;
+ }
+
+ /* copy data back to buffers */
+ memcpy(hiv->data.data, p, hiv->data.length);
+ q = p + hiv->data.length;
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
+ continue;
+ memcpy(data[i].data.data, q, data[i].data.length);
+ q += data[i].data.length;
+ }
+
+ free(p);
+
+ /* check signature */
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
+ continue;
+ len += data[i].data.length;
+ }
+
+ p = q = malloc(len);
+ if (p == NULL)
+ return ENOMEM;
+
+ memcpy(q, hiv->data.data, hiv->data.length);
+ q += hiv->data.length;
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
+ data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
+ continue;
+ memcpy(q, data[i].data.data, data[i].data.length);
+ q += data[i].data.length;
+ }
+
+ cksum.checksum.data = tiv->data.data;
+ cksum.checksum.length = tiv->data.length;
+ cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
+
+ ret = verify_checksum(context,
+ crypto,
+ INTEGRITY_USAGE(usage),
+ p,
+ len,
+ &cksum);
+ free(p);
+ return ret;
+}
+
+/**
+ * Create a Kerberos message checksum.
+ *
+ * @param context Kerberos context
+ * @param crypto Kerberos crypto context
+ * @param usage Key usage for this buffer
+ * @param data array of buffers to process
+ * @param num_data length of array
+ * @param type output data
+ *
+ * @return Return an error code or 0.
+ * @ingroup krb5_crypto
+ */
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_create_checksum_iov(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ krb5_crypto_iov *data,
+ unsigned int num_data,
+ krb5_cksumtype *type)
+{
+ Checksum cksum;
+ krb5_crypto_iov *civ;
+ krb5_error_code ret;
+ int i;
+ size_t len;
+ char *p, *q;
+
+ if (num_data < 0) {
+ krb5_clear_error_message(context);
+ return KRB5_CRYPTO_INTERNAL;
+ }
+
+ if(!derived_crypto(context, crypto)) {
+ krb5_clear_error_message(context);
+ return KRB5_CRYPTO_INTERNAL;
+ }
+
+ civ = find_iv(data, num_data, KRB5_CRYPTO_TYPE_CHECKSUM);
+ if (civ == NULL)
+ return KRB5_BAD_MSIZE;
+
+ len = 0;
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
+ data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
+ continue;
+ len += data[i].data.length;
+ }
+
+ p = q = malloc(len);
+
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
+ data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
+ continue;
+ memcpy(q, data[i].data.data, data[i].data.length);
+ q += data[i].data.length;
+ }
+
+ ret = krb5_create_checksum(context, crypto, usage, 0, p, len, &cksum);
+ free(p);
+ if (ret)
+ return ret;
+
+ if (type)
+ *type = cksum.cksumtype;
+
+ if (cksum.checksum.length > civ->data.length) {
+ krb5_set_error_message(context, KRB5_BAD_MSIZE,
+ N_("Checksum larger then input buffer", ""));
+ free_Checksum(&cksum);
+ return KRB5_BAD_MSIZE;
+ }
+
+ civ->data.length = cksum.checksum.length;
+ memcpy(civ->data.data, cksum.checksum.data, civ->data.length);
+ free_Checksum(&cksum);
+
+ return 0;
+}
+
+/**
+ * Verify a Kerberos message checksum.
+ *
+ * @param context Kerberos context
+ * @param crypto Kerberos crypto context
+ * @param usage Key usage for this buffer
+ * @param data array of buffers to process
+ * @param num_data length of array
+ * @param type return checksum type if not NULL
+ *
+ * @return Return an error code or 0.
+ * @ingroup krb5_crypto
+ */
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_verify_checksum_iov(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ krb5_crypto_iov *data,
+ unsigned int num_data,
+ krb5_cksumtype *type)
+{
+ struct encryption_type *et = crypto->et;
+ Checksum cksum;
+ krb5_crypto_iov *civ;
+ krb5_error_code ret;
+ int i;
+ size_t len;
+ char *p, *q;
+
+ if (num_data < 0) {
+ krb5_clear_error_message(context);
+ return KRB5_CRYPTO_INTERNAL;
+ }
+
+ if(!derived_crypto(context, crypto)) {
+ krb5_clear_error_message(context);
+ return KRB5_CRYPTO_INTERNAL;
+ }
+
+ civ = find_iv(data, num_data, KRB5_CRYPTO_TYPE_CHECKSUM);
+ if (civ == NULL)
+ return KRB5_BAD_MSIZE;
+
+ len = 0;
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
+ data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
+ continue;
+ len += data[i].data.length;
+ }
+
+ p = q = malloc(len);
+
+ for (i = 0; i < num_data; i++) {
+ if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
+ data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
+ continue;
+ memcpy(q, data[i].data.data, data[i].data.length);
+ q += data[i].data.length;
+ }
+
+ cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
+ cksum.checksum.length = civ->data.length;
+ cksum.checksum.data = civ->data.data;
+
+ ret = krb5_verify_checksum(context, crypto, usage, p, len, &cksum);
+ free(p);
+
+ if (ret == 0 && type)
+ *type = cksum.cksumtype;
+
+ return ret;
+}
+
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_crypto_length(krb5_context context,
+ krb5_crypto crypto,
+ int type,
+ size_t *len)
+{
+ if (!derived_crypto(context, crypto)) {
+ krb5_set_error_message(context, EINVAL, "not a derived crypto");
+ return EINVAL;
+ }
+
+ switch(type) {
+ case KRB5_CRYPTO_TYPE_EMPTY:
+ *len = 0;
+ return 0;
+ case KRB5_CRYPTO_TYPE_HEADER:
+ *len = crypto->et->blocksize;
+ return 0;
+ case KRB5_CRYPTO_TYPE_DATA:
+ case KRB5_CRYPTO_TYPE_SIGN_ONLY:
+ /* len must already been filled in */
+ return 0;
+ case KRB5_CRYPTO_TYPE_PADDING:
+ if (crypto->et->padsize > 1)
+ *len = crypto->et->padsize;
+ else
+ *len = 0;
+ return 0;
+ case KRB5_CRYPTO_TYPE_TRAILER:
+ *len = CHECKSUMSIZE(crypto->et->keyed_checksum);
+ return 0;
+ case KRB5_CRYPTO_TYPE_CHECKSUM:
+ if (crypto->et->keyed_checksum)
+ *len = CHECKSUMSIZE(crypto->et->keyed_checksum);
+ else
+ *len = CHECKSUMSIZE(crypto->et->checksum);
+ return 0;
+ }
+ krb5_set_error_message(context, EINVAL,
+ "%d not a supported type", type);
+ return EINVAL;
+}
+
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_crypto_length_iov(krb5_context context,
+ krb5_crypto crypto,
+ krb5_crypto_iov *data,
+ unsigned int num_data)
+{
+ krb5_error_code ret;
+ int i;
+
+ for (i = 0; i < num_data; i++) {
+ ret = krb5_crypto_length(context, crypto,
+ data[i].flags,
+ &data[i].data.length);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_encrypt_ivec(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ const void *data,
+ size_t len,
+ krb5_data *result,
+ void *ivec)
+{
+ if(derived_crypto(context, crypto))
+ return encrypt_internal_derived(context, crypto, usage,
+ data, len, result, ivec);
+ else if (special_crypto(context, crypto))
+ return encrypt_internal_special (context, crypto, usage,
+ data, len, result, ivec);
+ else
+ return encrypt_internal(context, crypto, data, len, result, ivec);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_encrypt(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ const void *data,
+ size_t len,
+ krb5_data *result)
+{
+ return krb5_encrypt_ivec(context, crypto, usage, data, len, result, NULL);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_encrypt_EncryptedData(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ void *data,
+ size_t len,
+ int kvno,
+ EncryptedData *result)
+{
+ result->etype = CRYPTO_ETYPE(crypto);
+ if(kvno){
+ ALLOC(result->kvno, 1);
+ *result->kvno = kvno;
+ }else
+ result->kvno = NULL;
+ return krb5_encrypt(context, crypto, usage, data, len, &result->cipher);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_decrypt_ivec(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ void *data,
+ size_t len,
+ krb5_data *result,
+ void *ivec)
+{
+ if(derived_crypto(context, crypto))
+ return decrypt_internal_derived(context, crypto, usage,
+ data, len, result, ivec);
+ else if (special_crypto (context, crypto))
+ return decrypt_internal_special(context, crypto, usage,
+ data, len, result, ivec);
+ else
+ return decrypt_internal(context, crypto, data, len, result, ivec);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_decrypt(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ void *data,
+ size_t len,
+ krb5_data *result)
+{
+ return krb5_decrypt_ivec (context, crypto, usage, data, len, result,
+ NULL);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_decrypt_EncryptedData(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
+ const EncryptedData *e,
+ krb5_data *result)
+{
+ return krb5_decrypt(context, crypto, usage,
+ e->cipher.data, e->cipher.length, result);
+}
+
+/************************************************************
+ * *
+ ************************************************************/
+
+#define ENTROPY_NEEDED 128
+
+static int
+seed_something(void)
+{
+ char buf[1024], seedfile[256];
+
+ /* If there is a seed file, load it. But such a file cannot be trusted,
+ so use 0 for the entropy estimate */
+ if (RAND_file_name(seedfile, sizeof(seedfile))) {
+ int fd;
+ fd = open(seedfile, O_RDONLY | O_BINARY | O_CLOEXEC);
+ if (fd >= 0) {
+ ssize_t ret;
+ rk_cloexec(fd);
+ ret = read(fd, buf, sizeof(buf));
if (ret > 0)
RAND_add(buf, ret, 0.0);
close(fd);
/* Try using egd */
if (!krb5_init_context(&context)) {
p = krb5_config_get_string(context, NULL, "libdefaults",
- "egd_socket", NULL);
+ "egd_socket", NULL);
if (p != NULL)
RAND_egd_bytes(p, ENTROPY_NEEDED);
krb5_free_context(context);
}
}
-
+
if (RAND_status() == 1) {
/* Update the seed file */
if (seedfile[0])
krb5_generate_random_block(void *buf, size_t len)
{
static int rng_initialized = 0;
-
+
HEIMDAL_MUTEX_lock(&crypto_mutex);
if (!rng_initialized) {
if (seed_something())
- krb5_abortx(NULL, "Fatal: could not seed the random number generator");
+ krb5_abortx(NULL, "Fatal: could not seed the "
+ "random number generator");
rng_initialized = 1;
}
HEIMDAL_MUTEX_unlock(&crypto_mutex);
- RAND_bytes(buf, len);
-}
-
-#else
-
-void KRB5_LIB_FUNCTION
-krb5_generate_random_block(void *buf, size_t len)
-{
- DES_cblock key, out;
- static DES_cblock counter;
- static DES_key_schedule schedule;
- int i;
- static int initialized = 0;
-
- HEIMDAL_MUTEX_lock(&crypto_mutex);
- if(!initialized) {
- DES_new_random_key(&key);
- DES_set_key(&key, &schedule);
- memset(&key, 0, sizeof(key));
- DES_new_random_key(&counter);
- initialized = 1;
- }
- HEIMDAL_MUTEX_unlock(&crypto_mutex);
- while(len > 0) {
- DES_ecb_encrypt(&counter, &out, &schedule, DES_ENCRYPT);
- for(i = 7; i >=0; i--)
- if(counter[i]++)
- break;
- memcpy(buf, out, min(len, sizeof(out)));
- len -= min(len, sizeof(out));
- buf = (char*)buf + sizeof(out);
- }
-}
-#endif
-
-static void
-DES3_postproc(krb5_context context,
- unsigned char *k, size_t len, struct key_data *key)
-{
- DES3_random_to_key(context, key->key, k, len);
-
- if (key->schedule) {
- krb5_free_data(context, key->schedule);
- key->schedule = NULL;
- }
+ if (RAND_bytes(buf, len) != 1)
+ krb5_abortx(NULL, "Failed to generate random block");
}
static krb5_error_code
const void *constant,
size_t len)
{
- unsigned char *k;
+ unsigned char *k = NULL;
unsigned int nblocks = 0, i;
krb5_error_code ret = 0;
-
struct key_type *kt = et->keytype;
- /* since RC2 is only the weird crypto alg with parameter and this
- * function not defined with work with RC2, this is ok */
- ret = _key_schedule(context, key, NULL);
+
+ ret = _key_schedule(context, key);
if(ret)
return ret;
- if(et->blocksize * 8 < kt->bits ||
- len != et->blocksize) {
+ if(et->blocksize * 8 < kt->bits || len != et->blocksize) {
nblocks = (kt->bits + et->blocksize * 8 - 1) / (et->blocksize * 8);
k = malloc(nblocks * et->blocksize);
if(k == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
- return ENOMEM;
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ goto out;
}
- _krb5_n_fold(constant, len, k, et->blocksize);
+ ret = _krb5_n_fold(constant, len, k, et->blocksize);
+ if (ret) {
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ goto out;
+ }
+
for(i = 0; i < nblocks; i++) {
if(i > 0)
- memcpy(k + i * et->blocksize,
+ memcpy(k + i * et->blocksize,
k + (i - 1) * et->blocksize,
et->blocksize);
(*et->encrypt)(context, key, k + i * et->blocksize, et->blocksize,
size_t res_len = (kt->bits + 7) / 8;
if(len != 0 && c == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
- return ENOMEM;
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ goto out;
}
memcpy(c, constant, len);
(*et->encrypt)(context, key, c, len, 1, 0, NULL);
k = malloc(res_len);
if(res_len != 0 && k == NULL) {
free(c);
- krb5_set_error_string(context, "malloc: out of memory");
- return ENOMEM;
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ goto out;
}
- _krb5_n_fold(c, len, k, res_len);
+ ret = _krb5_n_fold(c, len, k, res_len);
free(c);
+ if (ret) {
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ goto out;
+ }
}
-
+
/* XXX keytype dependent post-processing */
switch(kt->type) {
case KEYTYPE_DES3:
- DES3_postproc(context, k, nblocks * et->blocksize, key);
+ DES3_random_to_key(context, key->key, k, nblocks * et->blocksize);
break;
case KEYTYPE_AES128:
case KEYTYPE_AES256:
memcpy(key->key->keyvalue.data, k, key->key->keyvalue.length);
break;
default:
- krb5_set_error_string(context,
- "derive_key() called with unknown keytype (%u)",
- kt->type);
ret = KRB5_CRYPTO_INTERNAL;
+ krb5_set_error_message(context, ret,
+ N_("derive_key() called with unknown keytype (%u)", ""),
+ kt->type);
break;
}
+ out:
if (key->schedule) {
- krb5_free_data(context, key->schedule);
+ free_key_schedule(context, key, et);
key->schedule = NULL;
}
- memset(k, 0, nblocks * et->blocksize);
- free(k);
+ if (k) {
+ memset(k, 0, nblocks * et->blocksize);
+ free(k);
+ }
return ret;
}
struct encryption_type *et;
struct key_data d;
+ *derived_key = NULL;
+
et = _find_enctype (etype);
if (et == NULL) {
- krb5_set_error_string(context, "encryption type %d not supported",
- etype);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
return KRB5_PROG_ETYPE_NOSUPP;
}
- ret = krb5_copy_keyblock(context, key, derived_key);
+ ret = krb5_copy_keyblock(context, key, &d.key);
if (ret)
return ret;
- d.key = *derived_key;
d.schedule = NULL;
ret = derive_key(context, et, &d, constant, constant_len);
- if (ret)
- return ret;
- ret = krb5_copy_keyblock(context, d.key, derived_key);
+ if (ret == 0)
+ ret = krb5_copy_keyblock(context, d.key, derived_key);
+ free_key_data(context, &d, et);
return ret;
}
static krb5_error_code
-_get_derived_key(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
+_get_derived_key(krb5_context context,
+ krb5_crypto crypto,
+ unsigned usage,
struct key_data **key)
{
int i;
}
d = _new_derived_key(crypto, usage);
if(d == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
krb5_copy_keyblock(context, crypto->key.key, &d->key);
return 0;
}
+/**
+ * Create a crypto context used for all encryption and signature
+ * operation. The encryption type to use is taken from the key, but
+ * can be overridden with the enctype parameter. This can be useful
+ * for encryptions types which is compatiable (DES for example).
+ *
+ * To free the crypto context, use krb5_crypto_destroy().
+ *
+ * @param context Kerberos context
+ * @param key the key block information with all key data
+ * @param etype the encryption type
+ * @param crypto the resulting crypto context
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
krb5_error_code KRB5_LIB_FUNCTION
krb5_crypto_init(krb5_context context,
krb5_error_code ret;
ALLOC(*crypto, 1);
if(*crypto == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
if(etype == ETYPE_NULL)
if((*crypto)->et == NULL || ((*crypto)->et->flags & F_DISABLED)) {
free(*crypto);
*crypto = NULL;
- krb5_set_error_string (context, "encryption type %d not supported",
- etype);
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
return KRB5_PROG_ETYPE_NOSUPP;
}
- if((*crypto)->et->keytype->minsize > key->keyvalue.length) {
+ if((*crypto)->et->keytype->size != key->keyvalue.length) {
free(*crypto);
*crypto = NULL;
- krb5_set_error_string (context, "encryption key has bad length");
+ krb5_set_error_message (context, KRB5_BAD_KEYSIZE,
+ "encryption key has bad length");
return KRB5_BAD_KEYSIZE;
}
ret = krb5_copy_keyblock(context, key, &(*crypto)->key.key);
(*crypto)->key.schedule = NULL;
(*crypto)->num_key_usage = 0;
(*crypto)->key_usage = NULL;
- (*crypto)->params = NULL;
return 0;
}
static void
-free_key_data(krb5_context context, struct key_data *key)
+free_key_schedule(krb5_context context,
+ struct key_data *key,
+ struct encryption_type *et)
+{
+ if (et->keytype->cleanup)
+ (*et->keytype->cleanup)(context, key);
+ memset(key->schedule->data, 0, key->schedule->length);
+ krb5_free_data(context, key->schedule);
+}
+
+static void
+free_key_data(krb5_context context, struct key_data *key,
+ struct encryption_type *et)
{
krb5_free_keyblock(context, key->key);
if(key->schedule) {
- memset(key->schedule->data, 0, key->schedule->length);
- krb5_free_data(context, key->schedule);
+ free_key_schedule(context, key, et);
+ key->schedule = NULL;
}
}
static void
-free_key_usage(krb5_context context, struct key_usage *ku)
+free_key_usage(krb5_context context, struct key_usage *ku,
+ struct encryption_type *et)
{
- free_key_data(context, &ku->key);
+ free_key_data(context, &ku->key, et);
}
+/**
+ * Free a crypto context created by krb5_crypto_init().
+ *
+ * @param context Kerberos context
+ * @param crypto crypto context to free
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
+
krb5_error_code KRB5_LIB_FUNCTION
krb5_crypto_destroy(krb5_context context,
krb5_crypto crypto)
{
int i;
-
+
for(i = 0; i < crypto->num_key_usage; i++)
- free_key_usage(context, &crypto->key_usage[i]);
+ free_key_usage(context, &crypto->key_usage[i], crypto->et);
free(crypto->key_usage);
- free_key_data(context, &crypto->key);
- free(crypto->params);
+ free_key_data(context, &crypto->key, crypto->et);
free (crypto);
return 0;
}
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_crypto_get_params(krb5_context context,
- const krb5_crypto crypto,
- const krb5_data *params,
- krb5_data *ivec)
-{
- krb5_error_code (*gp)(krb5_context, const krb5_data *,void **,krb5_data *);
- krb5_error_code ret;
-
- gp = crypto->et->keytype->get_params;
- if (gp) {
- if (crypto->params) {
- krb5_set_error_string(context,
- "krb5_crypto_get_params called "
- "more than once");
- return KRB5_PROG_ETYPE_NOSUPP;
- }
- ret = (*gp)(context, params, &crypto->params, ivec);
- } else {
- size_t size;
- if (ivec == NULL)
- return 0;
- ret = decode_CBCParameter(params->data, params->length, ivec, &size);
- }
- if (ret)
- return ret;
- if (ivec->length < crypto->et->blocksize) {
- krb5_data_free(ivec);
- krb5_set_error_string(context, "%s IV of wrong size",
- crypto->et->name);
- return ASN1_PARSE_ERROR;
- }
- return 0;
-}
-
-krb5_error_code KRB5_LIB_FUNCTION
-krb5_crypto_set_params(krb5_context context,
- const krb5_crypto crypto,
- const krb5_data *ivec,
- krb5_data *params)
-{
- krb5_error_code (*sp)(krb5_context, const void *,
- const krb5_data *, krb5_data *);
- krb5_error_code ret;
-
- sp = crypto->et->keytype->set_params;
- if (sp == NULL) {
- size_t size;
- if (ivec == NULL)
- return 0;
- ASN1_MALLOC_ENCODE(CBCParameter, params->data, params->length,
- ivec, &size, ret);
- if (ret)
- return ret;
- if (size != params->length)
- krb5_abortx(context, "Internal asn1 encoder failure");
- return 0;
- }
- if (crypto->params) {
- krb5_set_error_string(context,
- "krb5_crypto_set_params called "
- "more than once");
- return KRB5_PROG_ETYPE_NOSUPP;
- }
- return (*sp)(context, crypto->params, ivec, params);
-}
-
+/**
+ * Return the blocksize used algorithm referenced by the crypto context
+ *
+ * @param context Kerberos context
+ * @param crypto crypto context to query
+ * @param blocksize the resulting blocksize
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
krb5_error_code KRB5_LIB_FUNCTION
krb5_crypto_getblocksize(krb5_context context,
return 0;
}
+/**
+ * Return the encryption type used by the crypto context
+ *
+ * @param context Kerberos context
+ * @param crypto crypto context to query
+ * @param enctype the resulting encryption type
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
+
krb5_error_code KRB5_LIB_FUNCTION
krb5_crypto_getenctype(krb5_context context,
krb5_crypto crypto,
krb5_enctype *enctype)
{
*enctype = crypto->et->type;
- return 0;
+ return 0;
}
+/**
+ * Return the padding size used by the crypto context
+ *
+ * @param context Kerberos context
+ * @param crypto crypto context to query
+ * @param padsize the return padding size
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
+
krb5_error_code KRB5_LIB_FUNCTION
krb5_crypto_getpadsize(krb5_context context,
krb5_crypto crypto,
- size_t *padsize)
+ size_t *padsize)
{
*padsize = crypto->et->padsize;
return 0;
}
+/**
+ * Return the confounder size used by the crypto context
+ *
+ * @param context Kerberos context
+ * @param crypto crypto context to query
+ * @param confoundersize the returned confounder size
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
+
krb5_error_code KRB5_LIB_FUNCTION
krb5_crypto_getconfoundersize(krb5_context context,
krb5_crypto crypto,
return 0;
}
+
+/**
+ * Disable encryption type
+ *
+ * @param context Kerberos 5 context
+ * @param enctype encryption type to disable
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
+
krb5_error_code KRB5_LIB_FUNCTION
krb5_enctype_disable(krb5_context context,
krb5_enctype enctype)
struct encryption_type *et = _find_enctype(enctype);
if(et == NULL) {
if (context)
- krb5_set_error_string (context, "encryption type %d not supported",
- enctype);
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ enctype);
return KRB5_PROG_ETYPE_NOSUPP;
}
et->flags |= F_DISABLED;
return 0;
}
+/**
+ * Enable encryption type
+ *
+ * @param context Kerberos 5 context
+ * @param enctype encryption type to enable
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_enctype_enable(krb5_context context,
+ krb5_enctype enctype)
+{
+ struct encryption_type *et = _find_enctype(enctype);
+ if(et == NULL) {
+ if (context)
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ enctype);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ et->flags &= ~F_DISABLED;
+ return 0;
+}
+
+
krb5_error_code KRB5_LIB_FUNCTION
krb5_string_to_key_derived(krb5_context context,
const void *str,
struct encryption_type *et = _find_enctype(etype);
krb5_error_code ret;
struct key_data kd;
- size_t keylen = et->keytype->bits / 8;
+ size_t keylen;
u_char *tmp;
if(et == NULL) {
- krb5_set_error_string (context, "encryption type %d not supported",
- etype);
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
return KRB5_PROG_ETYPE_NOSUPP;
}
+ keylen = et->keytype->bits / 8;
+
ALLOC(kd.key, 1);
if(kd.key == NULL) {
- krb5_set_error_string (context, "malloc: out of memory");
+ krb5_set_error_message (context, ENOMEM,
+ N_("malloc: out of memory", ""));
return ENOMEM;
}
ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
tmp = malloc (keylen);
if(tmp == NULL) {
krb5_free_keyblock(context, kd.key);
- krb5_set_error_string (context, "malloc: out of memory");
+ krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
- _krb5_n_fold(str, len, tmp, keylen);
+ ret = _krb5_n_fold(str, len, tmp, keylen);
+ if (ret) {
+ free(tmp);
+ krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
+ return ret;
+ }
kd.schedule = NULL;
- DES3_postproc (context, tmp, keylen, &kd); /* XXX */
+ DES3_random_to_key(context, kd.key, tmp, keylen);
memset(tmp, 0, keylen);
free(tmp);
- ret = derive_key(context,
+ ret = derive_key(context,
et,
&kd,
"kerberos", /* XXX well known constant */
strlen("kerberos"));
+ if (ret) {
+ free_key_data(context, &kd, et);
+ return ret;
+ }
ret = krb5_copy_keyblock_contents(context, kd.key, key);
- free_key_data(context, &kd);
+ free_key_data(context, &kd, et);
return ret;
}
return wrapped_length (context, crypto, data_len);
}
+/*
+ * Return the size of an encrypted packet of length `data_len'
+ */
+
+static size_t
+crypto_overhead (krb5_context context,
+ krb5_crypto crypto)
+{
+ struct encryption_type *et = crypto->et;
+ size_t res;
+
+ res = CHECKSUMSIZE(et->checksum);
+ res += et->confoundersize;
+ if (et->padsize > 1)
+ res += et->padsize;
+ return res;
+}
+
+static size_t
+crypto_overhead_dervied (krb5_context context,
+ krb5_crypto crypto)
+{
+ struct encryption_type *et = crypto->et;
+ size_t res;
+
+ if (et->keyed_checksum)
+ res = CHECKSUMSIZE(et->keyed_checksum);
+ else
+ res = CHECKSUMSIZE(et->checksum);
+ res += et->confoundersize;
+ if (et->padsize > 1)
+ res += et->padsize;
+ return res;
+}
+
+size_t
+krb5_crypto_overhead (krb5_context context, krb5_crypto crypto)
+{
+ if (derived_crypto (context, crypto))
+ return crypto_overhead_dervied (context, crypto);
+ else
+ return crypto_overhead (context, crypto);
+}
+
+/**
+ * Converts the random bytestring to a protocol key according to
+ * Kerberos crypto frame work. It may be assumed that all the bits of
+ * the input string are equally random, even though the entropy
+ * present in the random source may be limited.
+ *
+ * @param context Kerberos 5 context
+ * @param type the enctype resulting key will be of
+ * @param data input random data to convert to a key
+ * @param size size of input random data, at least krb5_enctype_keysize() long
+ * @param key key, output key, free with krb5_free_keyblock_contents()
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
+
krb5_error_code KRB5_LIB_FUNCTION
krb5_random_to_key(krb5_context context,
krb5_enctype type,
krb5_error_code ret;
struct encryption_type *et = _find_enctype(type);
if(et == NULL) {
- krb5_set_error_string(context, "encryption type %d not supported",
- type);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ type);
return KRB5_PROG_ETYPE_NOSUPP;
}
if ((et->keytype->bits + 7) / 8 > size) {
- krb5_set_error_string(context, "encryption key %s needs %d bytes "
- "of random to make an encryption key out of it",
- et->name, (int)et->keytype->size);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption key %s needs %d bytes "
+ "of random to make an encryption key "
+ "out of it", ""),
+ et->name, (int)et->keytype->size);
return KRB5_PROG_ETYPE_NOSUPP;
}
ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
- if(ret)
+ if(ret)
return ret;
key->keytype = type;
if (et->keytype->random_to_key)
size_t keylen, offset;
void *keydata;
unsigned char counter;
- unsigned char shaoutput[20];
+ unsigned char shaoutput[SHA_DIGEST_LENGTH];
+ EVP_MD_CTX *m;
if(et == NULL) {
- krb5_set_error_string(context, "encryption type %d not supported",
- type);
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ type);
return KRB5_PROG_ETYPE_NOSUPP;
}
keylen = (et->keytype->bits + 7) / 8;
keydata = malloc(keylen);
if (keydata == NULL) {
- krb5_set_error_string(context, "malloc: out of memory");
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ m = EVP_MD_CTX_create();
+ if (m == NULL) {
+ free(keydata);
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
counter = 0;
offset = 0;
do {
- SHA_CTX m;
- SHA1_Init(&m);
- SHA1_Update(&m, &counter, 1);
- SHA1_Update(&m, dhdata, dhsize);
+ EVP_DigestInit_ex(m, EVP_sha1(), NULL);
+ EVP_DigestUpdate(m, &counter, 1);
+ EVP_DigestUpdate(m, dhdata, dhsize);
+
if (c_n)
- SHA1_Update(&m, c_n->data, c_n->length);
+ EVP_DigestUpdate(m, c_n->data, c_n->length);
if (k_n)
- SHA1_Update(&m, k_n->data, k_n->length);
- SHA1_Final(shaoutput, &m);
+ EVP_DigestUpdate(m, k_n->data, k_n->length);
+
+ EVP_DigestFinal_ex(m, shaoutput, NULL);
memcpy((unsigned char *)keydata + offset,
shaoutput,
} while(offset < keylen);
memset(shaoutput, 0, sizeof(shaoutput));
+ EVP_MD_CTX_destroy(m);
+
ret = krb5_random_to_key(context, type, keydata, keylen, key);
memset(keydata, 0, sizeof(keylen));
free(keydata);
return ret;
}
+static krb5_error_code
+encode_uvinfo(krb5_context context, krb5_const_principal p, krb5_data *data)
+{
+ KRB5PrincipalName pn;
+ krb5_error_code ret;
+ size_t size;
+
+ pn.principalName = p->name;
+ pn.realm = p->realm;
-#ifdef CRYPTO_DEBUG
+ ASN1_MALLOC_ENCODE(KRB5PrincipalName, data->data, data->length,
+ &pn, &size, ret);
+ if (ret) {
+ krb5_data_zero(data);
+ krb5_set_error_message(context, ret,
+ N_("Failed to encode KRB5PrincipalName", ""));
+ return ret;
+ }
+ if (data->length != size)
+ krb5_abortx(context, "asn1 compiler internal error");
+ return 0;
+}
static krb5_error_code
-krb5_get_keyid(krb5_context context,
- krb5_keyblock *key,
- u_int32_t *keyid)
-{
- MD5_CTX md5;
- unsigned char tmp[16];
+encode_otherinfo(krb5_context context,
+ const AlgorithmIdentifier *ai,
+ krb5_const_principal client,
+ krb5_const_principal server,
+ krb5_enctype enctype,
+ const krb5_data *as_req,
+ const krb5_data *pk_as_rep,
+ const Ticket *ticket,
+ krb5_data *other)
+{
+ PkinitSP80056AOtherInfo otherinfo;
+ PkinitSuppPubInfo pubinfo;
+ krb5_error_code ret;
+ krb5_data pub;
+ size_t size;
+
+ krb5_data_zero(other);
+ memset(&otherinfo, 0, sizeof(otherinfo));
+ memset(&pubinfo, 0, sizeof(pubinfo));
+
+ pubinfo.enctype = enctype;
+ pubinfo.as_REQ = *as_req;
+ pubinfo.pk_as_rep = *pk_as_rep;
+ pubinfo.ticket = *ticket;
+ ASN1_MALLOC_ENCODE(PkinitSuppPubInfo, pub.data, pub.length,
+ &pubinfo, &size, ret);
+ if (ret) {
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ return ret;
+ }
+ if (pub.length != size)
+ krb5_abortx(context, "asn1 compiler internal error");
+
+ ret = encode_uvinfo(context, client, &otherinfo.partyUInfo);
+ if (ret) {
+ free(pub.data);
+ return ret;
+ }
+ ret = encode_uvinfo(context, server, &otherinfo.partyVInfo);
+ if (ret) {
+ free(otherinfo.partyUInfo.data);
+ free(pub.data);
+ return ret;
+ }
+
+ otherinfo.algorithmID = *ai;
+ otherinfo.suppPubInfo = &pub;
+
+ ASN1_MALLOC_ENCODE(PkinitSP80056AOtherInfo, other->data, other->length,
+ &otherinfo, &size, ret);
+ free(otherinfo.partyUInfo.data);
+ free(otherinfo.partyVInfo.data);
+ free(pub.data);
+ if (ret) {
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ return ret;
+ }
+ if (other->length != size)
+ krb5_abortx(context, "asn1 compiler internal error");
- MD5_Init (&md5);
- MD5_Update (&md5, key->keyvalue.data, key->keyvalue.length);
- MD5_Final (tmp, &md5);
- *keyid = (tmp[12] << 24) | (tmp[13] << 16) | (tmp[14] << 8) | tmp[15];
return 0;
}
-static void
-krb5_crypto_debug(krb5_context context,
- int encryptp,
- size_t len,
- krb5_keyblock *key)
+krb5_error_code
+_krb5_pk_kdf(krb5_context context,
+ const struct AlgorithmIdentifier *ai,
+ const void *dhdata,
+ size_t dhsize,
+ krb5_const_principal client,
+ krb5_const_principal server,
+ krb5_enctype enctype,
+ const krb5_data *as_req,
+ const krb5_data *pk_as_rep,
+ const Ticket *ticket,
+ krb5_keyblock *key)
+{
+ struct encryption_type *et;
+ krb5_error_code ret;
+ krb5_data other;
+ size_t keylen, offset;
+ uint32_t counter;
+ unsigned char *keydata;
+ unsigned char shaoutput[SHA_DIGEST_LENGTH];
+ EVP_MD_CTX *m;
+
+ if (der_heim_oid_cmp(&asn1_oid_id_pkinit_kdf_ah_sha1, &ai->algorithm) != 0) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("KDF not supported", ""));
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ if (ai->parameters != NULL &&
+ (ai->parameters->length != 2 ||
+ memcmp(ai->parameters->data, "\x05\x00", 2) != 0))
+ {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("kdf params not NULL or the NULL-type",
+ ""));
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+
+ et = _find_enctype(enctype);
+ if(et == NULL) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ enctype);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ keylen = (et->keytype->bits + 7) / 8;
+
+ keydata = malloc(keylen);
+ if (keydata == NULL) {
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ ret = encode_otherinfo(context, ai, client, server,
+ enctype, as_req, pk_as_rep, ticket, &other);
+ if (ret) {
+ free(keydata);
+ return ret;
+ }
+
+ m = EVP_MD_CTX_create();
+ if (m == NULL) {
+ free(keydata);
+ free(other.data);
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ offset = 0;
+ counter = 1;
+ do {
+ unsigned char cdata[4];
+
+ EVP_DigestInit_ex(m, EVP_sha1(), NULL);
+ _krb5_put_int(cdata, counter, 4);
+ EVP_DigestUpdate(m, cdata, 4);
+ EVP_DigestUpdate(m, dhdata, dhsize);
+ EVP_DigestUpdate(m, other.data, other.length);
+
+ EVP_DigestFinal_ex(m, shaoutput, NULL);
+
+ memcpy((unsigned char *)keydata + offset,
+ shaoutput,
+ min(keylen - offset, sizeof(shaoutput)));
+
+ offset += sizeof(shaoutput);
+ counter++;
+ } while(offset < keylen);
+ memset(shaoutput, 0, sizeof(shaoutput));
+
+ EVP_MD_CTX_destroy(m);
+ free(other.data);
+
+ ret = krb5_random_to_key(context, enctype, keydata, keylen, key);
+ memset(keydata, 0, sizeof(keylen));
+ free(keydata);
+
+ return ret;
+}
+
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_crypto_prf_length(krb5_context context,
+ krb5_enctype type,
+ size_t *length)
{
- u_int32_t keyid;
- char *kt;
- krb5_get_keyid(context, key, &keyid);
- krb5_enctype_to_string(context, key->keytype, &kt);
- krb5_warnx(context, "%s %lu bytes with key-id %#x (%s)",
- encryptp ? "encrypting" : "decrypting",
- (unsigned long)len,
- keyid,
- kt);
- free(kt);
+ struct encryption_type *et = _find_enctype(type);
+
+ if(et == NULL || et->prf_length == 0) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ type);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+
+ *length = et->prf_length;
+ return 0;
}
-#endif /* CRYPTO_DEBUG */
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_crypto_prf(krb5_context context,
+ const krb5_crypto crypto,
+ const krb5_data *input,
+ krb5_data *output)
+{
+ struct encryption_type *et = crypto->et;
+
+ krb5_data_zero(output);
+
+ if(et->prf == NULL) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ "kerberos prf for %s not supported",
+ et->name);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+
+ return (*et->prf)(context, crypto, input, output);
+}
-#if 0
-int
-main()
+static krb5_error_code
+krb5_crypto_prfplus(krb5_context context,
+ const krb5_crypto crypto,
+ const krb5_data *input,
+ size_t length,
+ krb5_data *output)
{
-#if 0
- int i;
- krb5_context context;
- krb5_crypto crypto;
- struct key_data *d;
- krb5_keyblock key;
- char constant[4];
- unsigned usage = ENCRYPTION_USAGE(3);
krb5_error_code ret;
+ krb5_data input2;
+ unsigned char i = 1;
+ unsigned char *p;
- ret = krb5_init_context(&context);
- if (ret)
- errx (1, "krb5_init_context failed: %d", ret);
+ krb5_data_zero(&input2);
+ krb5_data_zero(output);
- key.keytype = ETYPE_NEW_DES3_CBC_SHA1;
- key.keyvalue.data = "\xb3\x85\x58\x94\xd9\xdc\x7c\xc8"
- "\x25\xe9\x85\xab\x3e\xb5\xfb\x0e"
- "\xc8\xdf\xab\x26\x86\x64\x15\x25";
- key.keyvalue.length = 24;
+ krb5_clear_error_message(context);
- krb5_crypto_init(context, &key, 0, &crypto);
+ ret = krb5_data_alloc(output, length);
+ if (ret) goto out;
+ ret = krb5_data_alloc(&input2, input->length + 1);
+ if (ret) goto out;
- d = _new_derived_key(crypto, usage);
- if(d == NULL)
- return ENOMEM;
- krb5_copy_keyblock(context, crypto->key.key, &d->key);
- _krb5_put_int(constant, usage, 4);
- derive_key(context, crypto->et, d, constant, sizeof(constant));
+ krb5_clear_error_message(context);
+
+ memcpy(((unsigned char *)input2.data) + 1, input->data, input->length);
+
+ p = output->data;
+
+ while (length) {
+ krb5_data block;
+
+ ((unsigned char *)input2.data)[0] = i++;
+
+ ret = krb5_crypto_prf(context, crypto, &input2, &block);
+ if (ret)
+ goto out;
+
+ if (block.length < length) {
+ memcpy(p, block.data, block.length);
+ length -= block.length;
+ } else {
+ memcpy(p, block.data, length);
+ length = 0;
+ }
+ p += block.length;
+ krb5_data_free(&block);
+ }
+
+ out:
+ krb5_data_free(&input2);
+ if (ret)
+ krb5_data_free(output);
return 0;
-#else
- int i;
- krb5_context context;
- krb5_crypto crypto;
- struct key_data *d;
- krb5_keyblock key;
+}
+
+/**
+ * The FX-CF2 key derivation function, used in FAST and preauth framework.
+ *
+ * @param context Kerberos 5 context
+ * @param crypto1 first key to combine
+ * @param crypto2 second key to combine
+ * @param pepper1 factor to combine with first key to garante uniqueness
+ * @param pepper2 factor to combine with second key to garante uniqueness
+ * @param enctype the encryption type of the resulting key
+ * @param res allocated key, free with krb5_free_keyblock_contents()
+ *
+ * @return Return an error code or 0.
+ *
+ * @ingroup krb5_crypto
+ */
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_crypto_fx_cf2(krb5_context context,
+ const krb5_crypto crypto1,
+ const krb5_crypto crypto2,
+ krb5_data *pepper1,
+ krb5_data *pepper2,
+ krb5_enctype enctype,
+ krb5_keyblock *res)
+{
krb5_error_code ret;
- Checksum res;
+ krb5_data os1, os2;
+ size_t i, keysize;
+
+ memset(res, 0, sizeof(*res));
+
+ ret = krb5_enctype_keysize(context, enctype, &keysize);
+ if (ret)
+ return ret;
- char *data = "what do ya want for nothing?";
+ ret = krb5_data_alloc(&res->keyvalue, keysize);
+ if (ret)
+ goto out;
+ ret = krb5_crypto_prfplus(context, crypto1, pepper1, keysize, &os1);
+ if (ret)
+ goto out;
+ ret = krb5_crypto_prfplus(context, crypto2, pepper2, keysize, &os2);
+ if (ret)
+ goto out;
- ret = krb5_init_context(&context);
+ res->keytype = enctype;
+ {
+ unsigned char *p1 = os1.data, *p2 = os2.data, *p3 = res->keyvalue.data;
+ for (i = 0; i < keysize; i++)
+ p3[i] = p1[i] ^ p2[i];
+ }
+ out:
if (ret)
- errx (1, "krb5_init_context failed: %d", ret);
+ krb5_data_free(&res->keyvalue);
+ krb5_data_free(&os1);
+ krb5_data_free(&os2);
+
+ return ret;
+}
+
+
- key.keytype = ETYPE_NEW_DES3_CBC_SHA1;
- key.keyvalue.data = "Jefe";
- /* "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b"
- "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b"; */
- key.keyvalue.length = 4;
+#ifndef HEIMDAL_SMALLER
- d = calloc(1, sizeof(*d));
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_keytype_to_enctypes (krb5_context context,
+ krb5_keytype keytype,
+ unsigned *len,
+ krb5_enctype **val)
+ KRB5_DEPRECATED
+{
+ int i;
+ unsigned n = 0;
+ krb5_enctype *ret;
- d->key = &key;
- res.checksum.length = 20;
- res.checksum.data = malloc(res.checksum.length);
- SP_HMAC_SHA1_checksum(context, d, data, 28, &res);
+ for (i = num_etypes - 1; i >= 0; --i) {
+ if (etypes[i]->keytype->type == keytype
+ && !(etypes[i]->flags & F_PSEUDO)
+ && krb5_enctype_valid(context, etypes[i]->type) == 0)
+ ++n;
+ }
+ if (n == 0) {
+ krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
+ "Keytype have no mapping");
+ return KRB5_PROG_KEYTYPE_NOSUPP;
+ }
+ ret = malloc(n * sizeof(*ret));
+ if (ret == NULL && n != 0) {
+ krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
+ return ENOMEM;
+ }
+ n = 0;
+ for (i = num_etypes - 1; i >= 0; --i) {
+ if (etypes[i]->keytype->type == keytype
+ && !(etypes[i]->flags & F_PSEUDO)
+ && krb5_enctype_valid(context, etypes[i]->type) == 0)
+ ret[n++] = etypes[i]->type;
+ }
+ *len = n;
+ *val = ret;
return 0;
-#endif
}
-#endif
+
+/* if two enctypes have compatible keys */
+krb5_boolean KRB5_LIB_FUNCTION
+krb5_enctypes_compatible_keys(krb5_context context,
+ krb5_enctype etype1,
+ krb5_enctype etype2)
+ KRB5_DEPRECATED
+{
+ struct encryption_type *e1 = _find_enctype(etype1);
+ struct encryption_type *e2 = _find_enctype(etype2);
+ return e1 != NULL && e2 != NULL && e1->keytype == e2->keytype;
+}
+
+#endif /* HEIMDAL_SMALLER */
git.samba.org / amitay / samba.git / blobdiff