+++ /dev/null
-/*
- * 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:
- *
- * 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.
- *
- * 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.
- */
-
-#include "krb5_locl.h"
-
-struct _krb5_key_usage {
- unsigned usage;
- struct _krb5_key_data key;
-};
-
-
-#ifndef HEIMDAL_SMALLER
-#define DES3_OLD_ENCTYPE 1
-#endif
-
-static krb5_error_code _get_derived_key(krb5_context, krb5_crypto,
- unsigned, struct _krb5_key_data**);
-static struct _krb5_key_data *_new_derived_key(krb5_crypto crypto, unsigned usage);
-
-static void free_key_schedule(krb5_context,
- struct _krb5_key_data *,
- struct _krb5_encryption_type *);
-
-/*
- * Converts etype to a user readable string and sets as a side effect
- * the krb5_error_message containing this string. Returns
- * KRB5_PROG_ETYPE_NOSUPP in not the conversion of the etype failed in
- * which case the error code of the etype convesion is returned.
- */
-
-static krb5_error_code
-unsupported_enctype(krb5_context context, krb5_enctype etype)
-{
- krb5_error_code ret;
- char *name;
-
- ret = krb5_enctype_to_string(context, etype, &name);
- if (ret)
- return ret;
-
- krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
- N_("Encryption type %s not supported", ""),
- name);
- free(name);
- return KRB5_PROG_ETYPE_NOSUPP;
-}
-
-/*
- *
- */
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_enctype_keysize(krb5_context context,
- krb5_enctype type,
- size_t *keysize)
-{
- struct _krb5_encryption_type *et = _krb5_find_enctype(type);
- if(et == NULL) {
- return unsupported_enctype (context, type);
- }
- *keysize = et->keytype->size;
- return 0;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_enctype_keybits(krb5_context context,
- krb5_enctype type,
- size_t *keybits)
-{
- struct _krb5_encryption_type *et = _krb5_find_enctype(type);
- if(et == NULL) {
- return unsupported_enctype (context, type);
- }
- *keybits = et->keytype->bits;
- return 0;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_generate_random_keyblock(krb5_context context,
- krb5_enctype type,
- krb5_keyblock *key)
-{
- krb5_error_code ret;
- struct _krb5_encryption_type *et = _krb5_find_enctype(type);
- if(et == NULL) {
- return unsupported_enctype (context, type);
- }
- ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
- 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,
- key->keyvalue.length);
- return 0;
-}
-
-static krb5_error_code
-_key_schedule(krb5_context context,
- struct _krb5_key_data *key)
-{
- krb5_error_code ret;
- struct _krb5_encryption_type *et;
- struct _krb5_key_type *kt;
-
- if (key->schedule != NULL)
- return 0;
-
- et = _krb5_find_enctype(key->key->keytype);
-
- if (et == NULL) {
- return unsupported_enctype (context,
- key->key->keytype);
- }
-
- kt = et->keytype;
-
- if(kt->schedule == NULL)
- return 0;
- ALLOC(key->schedule, 1);
- if (key->schedule == NULL)
- return krb5_enomem(context);
- ret = krb5_data_alloc(key->schedule, kt->schedule_size);
- if(ret) {
- free(key->schedule);
- key->schedule = NULL;
- return ret;
- }
- (*kt->schedule)(context, kt, key);
- return 0;
-}
-
-/************************************************************
- * *
- ************************************************************/
-
-static krb5_error_code
-EVP_unkeyed_checksum(krb5_context context,
- krb5_crypto crypto,
- struct _krb5_key_data *key,
- unsigned usage,
- const struct krb5_crypto_iov *iov,
- int niov,
- Checksum *C,
- const EVP_MD *md)
-{
- if (_krb5_evp_digest_iov(crypto,
- iov, niov,
- C->checksum.data, NULL,
- md, NULL) != 1)
- krb5_abortx(context, "unkeyed checksum failed");
-
- return 0;
-}
-
-#define EVP_SHA_CHECKSUM(name) \
- \
- static krb5_error_code \
- SHA ## name ##_checksum(krb5_context context, \
- krb5_crypto crypto, \
- struct _krb5_key_data *key, \
- unsigned usage, \
- const struct krb5_crypto_iov *iov, \
- int niov, \
- Checksum *C) \
- { \
- return EVP_unkeyed_checksum(context, crypto, key, \
- usage, iov, niov, \
- C, EVP_sha##name()); \
- }
-
-EVP_SHA_CHECKSUM(1)
-EVP_SHA_CHECKSUM(256)
-EVP_SHA_CHECKSUM(384)
-EVP_SHA_CHECKSUM(512)
-
-/* HMAC according to RFC2104 */
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-_krb5_internal_hmac_iov(krb5_context context,
- krb5_crypto crypto,
- struct _krb5_checksum_type *cm,
- unsigned usage,
- const struct krb5_crypto_iov *iov,
- int niov,
- struct _krb5_key_data *keyblock,
- Checksum *result)
-{
- unsigned char *ipad, *opad;
- unsigned char *key;
- struct krb5_crypto_iov *working;
- size_t key_len;
- size_t i;
-
- ipad = malloc(cm->blocksize);
- if (ipad == NULL)
- return ENOMEM;
-
- opad = malloc(cm->blocksize + cm->checksumsize);
- if (opad == NULL) {
- free(ipad);
- return ENOMEM;
- }
-
- working = calloc(niov + 1, sizeof(struct krb5_crypto_iov));
- if (working == NULL) {
- free(ipad);
- free(opad);
- return ENOMEM;
- }
-
- memset(ipad, 0x36, cm->blocksize);
- memset(opad, 0x5c, cm->blocksize);
-
- if(keyblock->key->keyvalue.length > cm->blocksize){
- working[0].data = keyblock->key->keyvalue;
- working[0].flags = KRB5_CRYPTO_TYPE_DATA;
- (*cm->checksum)(context,
- crypto,
- keyblock,
- usage,
- working,
- 1,
- result);
- key = result->checksum.data;
- key_len = result->checksum.length;
- } else {
- key = keyblock->key->keyvalue.data;
- key_len = keyblock->key->keyvalue.length;
- }
- for(i = 0; i < key_len; i++){
- ipad[i] ^= key[i];
- opad[i] ^= key[i];
- }
-
- working[0].data.data = ipad;
- working[0].data.length = cm->blocksize;
- working[0].flags = KRB5_CRYPTO_TYPE_DATA;
- for (i = 0; i < niov; i++)
- working[i + 1] = iov[i];
-
- (*cm->checksum)(context, crypto, keyblock, usage, working, niov + 1, result);
- memcpy(opad + cm->blocksize, result->checksum.data,
- result->checksum.length);
-
- working[0].data.data = opad;
- working[0].data.length = cm->blocksize + cm->checksumsize;
- working[0].flags = KRB5_CRYPTO_TYPE_DATA;
- (*cm->checksum)(context, crypto, keyblock, usage, working, 1, result);
- memset(ipad, 0, cm->blocksize);
- free(ipad);
- memset(opad, 0, cm->blocksize + cm->checksumsize);
- free(opad);
- free(working);
-
- return 0;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-_krb5_internal_hmac(krb5_context context,
- krb5_crypto crypto,
- struct _krb5_checksum_type *cm,
- const void *data,
- size_t len,
- unsigned usage,
- struct _krb5_key_data *keyblock,
- Checksum *result)
-{
- struct krb5_crypto_iov iov[1];
-
- iov[0].data.data = (void *) data;
- iov[0].data.length = len;
- iov[0].flags = KRB5_CRYPTO_TYPE_DATA;
- return _krb5_internal_hmac_iov(context, crypto, cm, usage, iov, 1,
- keyblock, result);
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_hmac(krb5_context context,
- krb5_cksumtype cktype,
- const void *data,
- size_t len,
- unsigned usage,
- krb5_keyblock *key,
- Checksum *result)
-{
- struct _krb5_checksum_type *c = _krb5_find_checksum(cktype);
- struct _krb5_key_data kd;
-
- krb5_error_code ret;
-
- if (c == NULL) {
- krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
- N_("checksum type %d not supported", ""),
- cktype);
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
-
- kd.key = key;
- kd.schedule = NULL;
-
- ret = _krb5_internal_hmac(context, NULL, c, data, len, usage, &kd, result);
-
- if (kd.schedule)
- krb5_free_data(context, kd.schedule);
-
- return ret;
-}
-
-krb5_error_code
-_krb5_SP_HMAC_SHA1_checksum(krb5_context context,
- krb5_crypto crypto,
- struct _krb5_key_data *key,
- unsigned usage,
- const struct krb5_crypto_iov *iov,
- int niov,
- Checksum *result)
-{
- krb5_error_code ret;
- unsigned char hmac[EVP_MAX_MD_SIZE];
- unsigned int hmaclen = sizeof(hmac);
-
- ret = _krb5_evp_hmac_iov(context, crypto, key, iov, niov, hmac, &hmaclen,
- EVP_sha1(), NULL);
- if (ret)
- return ret;
-
- heim_assert(result->checksum.length <= hmaclen,
- "SHA1 checksum too short");
- memcpy(result->checksum.data, hmac, result->checksum.length);
-
- return 0;
-}
-
-krb5_error_code
-_krb5_SP_HMAC_SHA1_verify(krb5_context context,
- krb5_crypto crypto,
- struct _krb5_key_data *key,
- unsigned usage,
- const struct krb5_crypto_iov *iov,
- int niov,
- Checksum *verify)
-{
- krb5_error_code ret;
- unsigned char hmac[EVP_MAX_MD_SIZE];
- unsigned int hmaclen = sizeof(hmac);
- krb5_data data;
-
- ret = _krb5_evp_hmac_iov(context, crypto, key, iov, niov, hmac, &hmaclen,
- EVP_sha1(), NULL);
- if (ret)
- return ret;
-
- data.data = hmac;
- data.length = min(hmaclen, verify->checksum.length);
-
- if(krb5_data_ct_cmp(&data, &verify->checksum) != 0)
- return KRB5KRB_AP_ERR_BAD_INTEGRITY;
-
- return 0;
-}
-
-#define SHA_CHECKSUM(name, blocksize, outputsize) \
- struct _krb5_checksum_type _krb5_checksum_sha##name = { \
- CKSUMTYPE_SHA##name, \
- "sha" #name, \
- blocksize, \
- outputsize, \
- F_CPROOF, \
- SHA##name##_checksum, \
- NULL \
- };
-
-SHA_CHECKSUM(1, 64, 20);
-SHA_CHECKSUM(256, 64, 32);
-SHA_CHECKSUM(384, 128, 48);
-SHA_CHECKSUM(512, 128, 64);
-
-KRB5_LIB_FUNCTION struct _krb5_checksum_type * KRB5_LIB_CALL
-_krb5_find_checksum(krb5_cksumtype type)
-{
- int i;
- for(i = 0; i < _krb5_num_checksums; i++)
- if(_krb5_checksum_types[i]->type == type)
- return _krb5_checksum_types[i];
- return NULL;
-}
-
-static krb5_error_code
-get_checksum_key(krb5_context context,
- krb5_crypto crypto,
- unsigned usage, /* not krb5_key_usage */
- struct _krb5_checksum_type *ct,
- struct _krb5_key_data **key)
-{
- krb5_error_code ret = 0;
- struct _krb5_checksum_type *kct = NULL;
-
- if (crypto == NULL) {
- krb5_set_error_message(context, KRB5_BAD_ENCTYPE,
- N_("Checksum type %s is keyed but no "
- "crypto context (key) was passed in", ""),
- ct->name);
- return KRB5_BAD_ENCTYPE;
- }
- kct = crypto->et->keyed_checksum;
- if (kct == NULL || kct->type != ct->type) {
- krb5_set_error_message(context, KRB5_BAD_ENCTYPE,
- 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_BAD_ENCTYPE;
- }
-
- if(ct->flags & F_DERIVED)
- ret = _get_derived_key(context, crypto, usage, key);
- else if(ct->flags & F_VARIANT) {
- size_t i;
-
- *key = _new_derived_key(crypto, 0xff/* KRB5_KU_RFC1510_VARIANT */);
- if (*key == NULL)
- return krb5_enomem(context);
- ret = krb5_copy_keyblock(context, crypto->key.key, &(*key)->key);
- 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;
- }
- if(ret == 0)
- ret = _key_schedule(context, *key);
- return ret;
-}
-
-static krb5_error_code
-create_checksum_iov(krb5_context context,
- struct _krb5_checksum_type *ct,
- krb5_crypto crypto,
- unsigned usage,
- struct krb5_crypto_iov *iov,
- int niov,
- krb5_flags flags,
- Checksum *result)
-{
- krb5_error_code ret;
- struct _krb5_key_data *dkey;
-
- if (ct->flags & F_DISABLED) {
- krb5_clear_error_message (context);
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
- if (ct->flags & F_KEYED) {
- ret = get_checksum_key(context, crypto, usage, ct, &dkey);
- if (ret)
- return ret;
- } else if ((flags & KRB5_CRYPTO_FLAG_ALLOW_UNKEYED_CHECKSUM) == 0) {
- return EINVAL;
- } else
- dkey = NULL;
-
- result->cksumtype = ct->type;
-
- return (*ct->checksum)(context, crypto, dkey, usage, iov, niov, result);
-}
-
-static krb5_error_code
-create_checksum (krb5_context context,
- struct _krb5_checksum_type *ct,
- krb5_crypto crypto,
- unsigned usage,
- void *data,
- size_t len,
- krb5_flags flags,
- Checksum *result)
-{
- int ret;
- struct krb5_crypto_iov iov[1];
-
- ret = krb5_data_alloc(&result->checksum, ct->checksumsize);
- if (ret)
- return ret;
-
- iov[0].data.data = data;
- iov[0].data.length = len;
- iov[0].flags = KRB5_CRYPTO_TYPE_DATA;
-
- return create_checksum_iov(context, ct, crypto, usage, iov, 1, flags, result);
-}
-
-static int
-arcfour_checksum_p(struct _krb5_checksum_type *ct, krb5_crypto crypto)
-{
- return (ct->type == CKSUMTYPE_HMAC_MD5) &&
- (crypto->key.key->keytype == KEYTYPE_ARCFOUR);
-}
-
-static inline krb5_flags
-crypto_flags(krb5_crypto crypto)
-{
- /* If caller didn't specify a key, unkeyed checksums are the only option */
- if (crypto == NULL)
- return KRB5_CRYPTO_FLAG_ALLOW_UNKEYED_CHECKSUM;
- else
- return crypto->flags;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_create_checksum(krb5_context context,
- krb5_crypto crypto,
- krb5_key_usage usage,
- int type,
- void *data,
- size_t len,
- Checksum *result)
-{
- struct _krb5_checksum_type *ct = NULL;
- unsigned keyusage;
-
- /* type 0 -> pick from crypto */
- if (type) {
- ct = _krb5_find_checksum(type);
- } else if (crypto) {
- ct = crypto->et->keyed_checksum;
- if (ct == NULL)
- ct = crypto->et->checksum;
- }
-
- if(ct == NULL) {
- krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
- N_("checksum type %d not supported", ""),
- type);
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
-
- if (arcfour_checksum_p(ct, crypto)) {
- keyusage = usage;
- _krb5_usage2arcfour(context, &keyusage);
- } else
- keyusage = CHECKSUM_USAGE(usage);
-
- return create_checksum(context, ct, crypto, keyusage, data, len,
- crypto_flags(crypto), result);
-}
-
-static krb5_error_code
-verify_checksum_iov(krb5_context context,
- krb5_crypto crypto,
- unsigned usage, /* not krb5_key_usage */
- struct krb5_crypto_iov *iov,
- int niov,
- krb5_flags flags,
- Checksum *cksum)
-{
- krb5_error_code ret;
- struct _krb5_key_data *dkey;
- Checksum c;
- struct _krb5_checksum_type *ct;
-
- ct = _krb5_find_checksum(cksum->cksumtype);
- if (ct == NULL || (ct->flags & F_DISABLED)) {
- 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_message (context);
- krb5_set_error_message(context, KRB5KRB_AP_ERR_BAD_INTEGRITY,
- N_("Decrypt integrity check failed for checksum type %s, "
- "length was %u, expected %u", ""),
- ct->name, (unsigned)cksum->checksum.length,
- (unsigned)ct->checksumsize);
-
- return KRB5KRB_AP_ERR_BAD_INTEGRITY; /* XXX */
- }
- if (ct->flags & F_KEYED) {
- ret = get_checksum_key(context, crypto, usage, ct, &dkey);
- if (ret)
- return ret;
- } else if ((flags & KRB5_CRYPTO_FLAG_ALLOW_UNKEYED_CHECKSUM) == 0) {
- krb5_clear_error_message (context);
- krb5_set_error_message(context, KRB5KRB_AP_ERR_BAD_INTEGRITY,
- N_("Unkeyed checksum type %s provided where keyed "
- "checksum was expected", ""), ct->name);
-
- return KRB5KRB_AP_ERR_INAPP_CKSUM;
- } else
- dkey = NULL;
-
- /*
- * If checksum have a verify function, lets use that instead of
- * calling ->checksum and then compare result.
- */
-
- if(ct->verify) {
- ret = (*ct->verify)(context, crypto, dkey, usage, iov, niov, cksum);
- if (ret)
- krb5_set_error_message(context, ret,
- N_("Decrypt integrity check failed for checksum "
- "type %s, key type %s", ""),
- ct->name, (crypto != NULL)? crypto->et->name : "(none)");
- return ret;
- }
-
- ret = krb5_data_alloc (&c.checksum, ct->checksumsize);
- if (ret)
- return ret;
-
- ret = (*ct->checksum)(context, crypto, dkey, usage, iov, niov, &c);
- if (ret) {
- krb5_data_free(&c.checksum);
- return ret;
- }
-
- if(krb5_data_ct_cmp(&c.checksum, &cksum->checksum) != 0) {
- ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
- krb5_set_error_message(context, ret,
- N_("Decrypt integrity check failed for checksum "
- "type %s, key type %s", ""),
- ct->name, crypto ? crypto->et->name : "(unkeyed)");
- } else {
- ret = 0;
- }
- krb5_data_free (&c.checksum);
- return ret;
-}
-
-static krb5_error_code
-verify_checksum(krb5_context context,
- krb5_crypto crypto,
- unsigned usage, /* not krb5_key_usage */
- void *data,
- size_t len,
- krb5_flags flags,
- Checksum *cksum)
-{
- struct krb5_crypto_iov iov[1];
-
- iov[0].data.data = data;
- iov[0].data.length = len;
- iov[0].flags = KRB5_CRYPTO_TYPE_DATA;
-
- return verify_checksum_iov(context, crypto, usage, iov, 1, flags, cksum);
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_verify_checksum(krb5_context context,
- krb5_crypto crypto,
- krb5_key_usage usage,
- void *data,
- size_t len,
- Checksum *cksum)
-{
- struct _krb5_checksum_type *ct;
- unsigned keyusage;
-
- ct = _krb5_find_checksum(cksum->cksumtype);
- if(ct == NULL) {
- krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
- N_("checksum type %d not supported", ""),
- cksum->cksumtype);
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
-
- if (arcfour_checksum_p(ct, crypto)) {
- keyusage = usage;
- _krb5_usage2arcfour(context, &keyusage);
- } else
- keyusage = CHECKSUM_USAGE(usage);
-
- return verify_checksum(context, crypto, keyusage,
- data, len, crypto_flags(crypto), cksum);
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_get_checksum_type(krb5_context context,
- krb5_crypto crypto,
- krb5_cksumtype *type)
-{
- struct _krb5_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_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
- N_("checksum type not found", ""));
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
-
- *type = ct->type;
-
- return 0;
-}
-
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_checksumsize(krb5_context context,
- krb5_cksumtype type,
- size_t *size)
-{
- struct _krb5_checksum_type *ct = _krb5_find_checksum(type);
- if(ct == NULL) {
- krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
- N_("checksum type %d not supported", ""),
- type);
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
- *size = ct->checksumsize;
- return 0;
-}
-
-KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
-krb5_checksum_is_keyed(krb5_context context,
- krb5_cksumtype type)
-{
- struct _krb5_checksum_type *ct = _krb5_find_checksum(type);
- if(ct == NULL) {
- if (context)
- 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;
-}
-
-KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
-krb5_checksum_is_collision_proof(krb5_context context,
- krb5_cksumtype type)
-{
- struct _krb5_checksum_type *ct = _krb5_find_checksum(type);
- if(ct == NULL) {
- if (context)
- 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;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_checksum_disable(krb5_context context,
- krb5_cksumtype type)
-{
- struct _krb5_checksum_type *ct = _krb5_find_checksum(type);
- if(ct == NULL) {
- if (context)
- 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;
- return 0;
-}
-
-/************************************************************
- * *
- ************************************************************/
-
-KRB5_LIB_FUNCTION struct _krb5_encryption_type * KRB5_LIB_CALL
-_krb5_find_enctype(krb5_enctype type)
-{
- int i;
- for(i = 0; i < _krb5_num_etypes; i++)
- if(_krb5_etypes[i]->type == type)
- return _krb5_etypes[i];
- return NULL;
-}
-
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_enctype_to_string(krb5_context context,
- krb5_enctype etype,
- char **string)
-{
- struct _krb5_encryption_type *e;
- e = _krb5_find_enctype(etype);
- if(e == NULL) {
- 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)
- return krb5_enomem(context);
- return 0;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_string_to_enctype(krb5_context context,
- const char *string,
- krb5_enctype *etype)
-{
- int i;
- for(i = 0; i < _krb5_num_etypes; i++) {
- if(strcasecmp(_krb5_etypes[i]->name, string) == 0){
- *etype = _krb5_etypes[i]->type;
- return 0;
- }
- if(_krb5_etypes[i]->alias != NULL &&
- strcasecmp(_krb5_etypes[i]->alias, string) == 0){
- *etype = _krb5_etypes[i]->type;
- return 0;
- }
- }
- krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
- N_("encryption type %s not supported", ""),
- string);
- return KRB5_PROG_ETYPE_NOSUPP;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_enctype_to_keytype(krb5_context context,
- krb5_enctype etype,
- krb5_keytype *keytype)
-{
- struct _krb5_encryption_type *e = _krb5_find_enctype(etype);
- if(e == NULL) {
- return unsupported_enctype (context, etype);
- }
- *keytype = e->keytype->type; /* XXX */
- return 0;
-}
-
-/**
- * Check if a enctype is valid, return 0 if it is.
- *
- * @param context Kerberos context
- * @param etype enctype to check if its valid or not
- *
- * @return Return an error code for an failure or 0 on success (enctype valid).
- * @ingroup krb5_crypto
- */
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_enctype_valid(krb5_context context,
- krb5_enctype etype)
-{
- struct _krb5_encryption_type *e = _krb5_find_enctype(etype);
- if(e && (e->flags & F_DISABLED) == 0)
- return 0;
- if (context == NULL)
- return KRB5_PROG_ETYPE_NOSUPP;
- if(e == NULL) {
- return unsupported_enctype (context, etype);
- }
- /* Must be (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;
-}
-
-/**
- * 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_cksumtype_to_enctype(krb5_context context,
- krb5_cksumtype ctype,
- krb5_enctype *etype)
-{
- int i;
-
- *etype = ETYPE_NULL;
-
- for(i = 0; i < _krb5_num_etypes; i++) {
- if(_krb5_etypes[i]->keyed_checksum &&
- _krb5_etypes[i]->keyed_checksum->type == ctype)
- {
- *etype = _krb5_etypes[i]->type;
- 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_cksumtype_valid(krb5_context context,
- krb5_cksumtype ctype)
-{
- struct _krb5_checksum_type *c = _krb5_find_checksum(ctype);
- if (c == NULL) {
- 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_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
- N_("checksum type %s is disabled", ""),
- c->name);
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
- return 0;
-}
-
-static krb5_boolean
-derived_crypto(krb5_context context,
- krb5_crypto crypto)
-{
- return (crypto->et->flags & F_DERIVED) != 0;
-}
-
-#define CHECKSUMSIZE(C) ((C)->checksumsize)
-#define CHECKSUMTYPE(C) ((C)->type)
-
-static krb5_error_code
-encrypt_internal_derived(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- const void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- size_t sz, block_sz, checksum_sz, total_sz;
- Checksum cksum;
- unsigned char *p, *q;
- krb5_error_code ret;
- struct _krb5_key_data *dkey;
- const struct _krb5_encryption_type *et = crypto->et;
-
- checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
-
- sz = et->confoundersize + len;
- block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
- total_sz = block_sz + checksum_sz;
- p = calloc(1, total_sz);
- if (p == NULL)
- return krb5_enomem(context);
-
- q = p;
- krb5_generate_random_block(q, et->confoundersize); /* XXX */
- q += et->confoundersize;
- memcpy(q, data, len);
-
- ret = create_checksum(context,
- et->keyed_checksum,
- crypto,
- INTEGRITY_USAGE(usage),
- p,
- block_sz,
- 0,
- &cksum);
- if(ret == 0 && cksum.checksum.length != checksum_sz) {
- free_Checksum (&cksum);
- krb5_clear_error_message (context);
- ret = KRB5_CRYPTO_INTERNAL;
- }
- if(ret)
- goto fail;
- memcpy(p + block_sz, cksum.checksum.data, cksum.checksum.length);
- free_Checksum (&cksum);
- ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
- if(ret)
- goto fail;
- ret = _key_schedule(context, dkey);
- if(ret)
- goto fail;
- ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
- if (ret)
- goto fail;
- result->data = p;
- result->length = total_sz;
- return 0;
- fail:
- memset(p, 0, total_sz);
- free(p);
- return ret;
-}
-
-static krb5_error_code
-encrypt_internal_enc_then_cksum(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- const void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- size_t sz, block_sz, checksum_sz, total_sz;
- Checksum cksum;
- unsigned char *p, *q, *ivc = NULL;
- krb5_error_code ret;
- struct _krb5_key_data *dkey;
- const struct _krb5_encryption_type *et = crypto->et;
-
- checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
-
- sz = et->confoundersize + len;
- block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
- total_sz = block_sz + checksum_sz;
- p = calloc(1, total_sz);
- if (p == NULL)
- return krb5_enomem(context);
-
- q = p;
- krb5_generate_random_block(q, et->confoundersize); /* XXX */
- q += et->confoundersize;
- memcpy(q, data, len);
-
- ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
- if(ret)
- goto fail;
- ret = _key_schedule(context, dkey);
- if(ret)
- goto fail;
-
- /* XXX EVP style update API would avoid needing to allocate here */
- ivc = malloc(et->blocksize + block_sz);
- if (ivc == NULL) {
- ret = krb5_enomem(context);
- goto fail;
- }
- if (ivec)
- memcpy(ivc, ivec, et->blocksize);
- else
- memset(ivc, 0, et->blocksize);
-
- ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
- if (ret)
- goto fail;
- memcpy(&ivc[et->blocksize], p, block_sz);
-
- ret = create_checksum(context,
- et->keyed_checksum,
- crypto,
- INTEGRITY_USAGE(usage),
- ivc,
- et->blocksize + block_sz,
- 0,
- &cksum);
- if(ret == 0 && cksum.checksum.length != checksum_sz) {
- free_Checksum (&cksum);
- krb5_clear_error_message (context);
- ret = KRB5_CRYPTO_INTERNAL;
- }
- if(ret)
- goto fail;
- memcpy(p + block_sz, cksum.checksum.data, cksum.checksum.length);
- free_Checksum (&cksum);
- result->data = p;
- result->length = total_sz;
- free(ivc);
- return 0;
- fail:
- memset_s(p, total_sz, 0, total_sz);
- free(p);
- free(ivc);
- return ret;
-}
-
-static krb5_error_code
-encrypt_internal(krb5_context context,
- krb5_crypto crypto,
- const void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- size_t sz, block_sz, checksum_sz;
- Checksum cksum;
- unsigned char *p, *q;
- krb5_error_code ret;
- const struct _krb5_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 */
- p = calloc(1, block_sz);
- if (p == NULL)
- return krb5_enomem(context);
-
- q = p;
- krb5_generate_random_block(q, et->confoundersize); /* XXX */
- q += et->confoundersize;
- memset(q, 0, checksum_sz);
- q += checksum_sz;
- memcpy(q, data, len);
-
- ret = create_checksum(context,
- et->checksum,
- crypto,
- 0,
- p,
- block_sz,
- KRB5_CRYPTO_FLAG_ALLOW_UNKEYED_CHECKSUM,
- &cksum);
- if(ret == 0 && cksum.checksum.length != checksum_sz) {
- krb5_clear_error_message (context);
- free_Checksum(&cksum);
- ret = KRB5_CRYPTO_INTERNAL;
- }
- if(ret)
- goto fail;
- memcpy(p + et->confoundersize, cksum.checksum.data, cksum.checksum.length);
- free_Checksum(&cksum);
- ret = _key_schedule(context, &crypto->key);
- if(ret)
- goto fail;
- ret = (*et->encrypt)(context, &crypto->key, p, block_sz, 1, 0, ivec);
- if (ret) {
- memset(p, 0, block_sz);
- free(p);
- return ret;
- }
- result->data = p;
- result->length = block_sz;
- return 0;
- fail:
- memset(p, 0, block_sz);
- free(p);
- return ret;
-}
-
-static krb5_error_code
-encrypt_internal_special(krb5_context context,
- krb5_crypto crypto,
- int usage,
- const void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- struct _krb5_encryption_type *et = crypto->et;
- size_t cksum_sz = CHECKSUMSIZE(et->checksum);
- size_t sz = len + cksum_sz + et->confoundersize;
- char *tmp, *p;
- krb5_error_code ret;
-
- tmp = malloc (sz);
- if (tmp == NULL)
- return krb5_enomem(context);
- p = tmp;
- memset (p, 0, cksum_sz);
- p += cksum_sz;
- krb5_generate_random_block(p, et->confoundersize);
- p += et->confoundersize;
- memcpy (p, data, len);
- ret = (*et->encrypt)(context, &crypto->key, tmp, sz, TRUE, usage, ivec);
- if (ret) {
- memset(tmp, 0, sz);
- free(tmp);
- return ret;
- }
- result->data = tmp;
- result->length = sz;
- return 0;
-}
-
-static krb5_error_code
-decrypt_internal_derived(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- size_t checksum_sz;
- Checksum cksum;
- unsigned char *p;
- krb5_error_code ret;
- struct _krb5_key_data *dkey;
- struct _krb5_encryption_type *et = crypto->et;
- unsigned long l;
-
- checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
- 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_message(context);
- return KRB5_BAD_MSIZE;
- }
-
- p = malloc(len);
- if (len != 0 && p == NULL)
- return krb5_enomem(context);
- memcpy(p, data, len);
-
- len -= checksum_sz;
-
- 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;
- }
-
- cksum.checksum.data = p + len;
- cksum.checksum.length = checksum_sz;
- cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
-
- ret = verify_checksum(context,
- crypto,
- INTEGRITY_USAGE(usage),
- p,
- len,
- 0,
- &cksum);
- if(ret) {
- free(p);
- return ret;
- }
- l = len - et->confoundersize;
- memmove(p, p + et->confoundersize, l);
- result->data = realloc(p, l);
- if(result->data == NULL && l != 0) {
- free(p);
- return krb5_enomem(context);
- }
- result->length = l;
- return 0;
-}
-
-static krb5_error_code
-decrypt_internal_enc_then_cksum(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- size_t checksum_sz;
- Checksum cksum;
- unsigned char *p;
- krb5_error_code ret;
- struct _krb5_key_data *dkey;
- struct _krb5_encryption_type *et = crypto->et;
- unsigned long l;
-
- checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
- 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_message(context);
- return KRB5_BAD_MSIZE;
- }
-
- len -= checksum_sz;
-
- p = malloc(et->blocksize + len);
- if (p == NULL)
- return krb5_enomem(context);
-
- if (ivec)
- memcpy(p, ivec, et->blocksize);
- else
- memset(p, 0, et->blocksize);
- memcpy(&p[et->blocksize], data, len);
-
- cksum.checksum.data = (unsigned char *)data + len;
- cksum.checksum.length = checksum_sz;
- cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
-
- ret = verify_checksum(context,
- crypto,
- INTEGRITY_USAGE(usage),
- p,
- et->blocksize + len,
- 0,
- &cksum);
- if(ret) {
- free(p);
- return ret;
- }
-
- 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[et->blocksize], len, 0, usage, ivec);
- if (ret) {
- free(p);
- return ret;
- }
-
- l = len - et->confoundersize;
- memmove(p, p + et->blocksize + et->confoundersize, l);
- result->data = realloc(p, l);
- if(result->data == NULL && l != 0) {
- free(p);
- return krb5_enomem(context);
- }
- result->length = l;
- return 0;
-}
-
-static krb5_error_code
-decrypt_internal(krb5_context context,
- krb5_crypto crypto,
- void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- krb5_error_code ret;
- unsigned char *p;
- Checksum cksum;
- size_t checksum_sz, l;
- struct _krb5_encryption_type *et = crypto->et;
-
- if ((len % et->padsize) != 0) {
- krb5_clear_error_message(context);
- return KRB5_BAD_MSIZE;
- }
- checksum_sz = CHECKSUMSIZE(et->checksum);
- 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;
- }
-
- p = malloc(len);
- if (len != 0 && p == NULL)
- return krb5_enomem(context);
- memcpy(p, data, len);
-
- ret = _key_schedule(context, &crypto->key);
- if(ret) {
- free(p);
- return ret;
- }
- ret = (*et->encrypt)(context, &crypto->key, p, len, 0, 0, ivec);
- if (ret) {
- free(p);
- return ret;
- }
- ret = krb5_data_copy(&cksum.checksum, p + et->confoundersize, checksum_sz);
- if(ret) {
- free(p);
- return ret;
- }
- memset(p + et->confoundersize, 0, checksum_sz);
- cksum.cksumtype = CHECKSUMTYPE(et->checksum);
- ret = verify_checksum(context, NULL, 0, p, len,
- KRB5_CRYPTO_FLAG_ALLOW_UNKEYED_CHECKSUM, &cksum);
- free_Checksum(&cksum);
- if(ret) {
- free(p);
- return ret;
- }
- l = len - et->confoundersize - checksum_sz;
- memmove(p, p + et->confoundersize + checksum_sz, l);
- result->data = realloc(p, l);
- if(result->data == NULL && l != 0) {
- free(p);
- return krb5_enomem(context);
- }
- result->length = l;
- return 0;
-}
-
-static krb5_error_code
-decrypt_internal_special(krb5_context context,
- krb5_crypto crypto,
- int usage,
- void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- struct _krb5_encryption_type *et = crypto->et;
- size_t cksum_sz = CHECKSUMSIZE(et->checksum);
- size_t sz = len - cksum_sz - et->confoundersize;
- unsigned char *p;
- krb5_error_code ret;
-
- if ((len % et->padsize) != 0) {
- krb5_clear_error_message(context);
- return KRB5_BAD_MSIZE;
- }
- if (len < cksum_sz + et->confoundersize) {
- krb5_set_error_message(context, KRB5_BAD_MSIZE,
- N_("Encrypted data shorter then "
- "checksum + confunder", ""));
- return KRB5_BAD_MSIZE;
- }
-
- p = malloc (len);
- if (p == NULL)
- return krb5_enomem(context);
- memcpy(p, data, len);
-
- ret = (*et->encrypt)(context, &crypto->key, p, len, FALSE, usage, ivec);
- if (ret) {
- free(p);
- return ret;
- }
-
- memmove (p, p + cksum_sz + et->confoundersize, sz);
- result->data = realloc(p, sz);
- if(result->data == NULL && sz != 0) {
- free(p);
- return krb5_enomem(context);
- }
- result->length = sz;
- return 0;
-}
-
-static krb5_crypto_iov *
-iov_find(krb5_crypto_iov *data, size_t num_data, unsigned type)
-{
- size_t i;
- for (i = 0; i < num_data; i++)
- if (data[i].flags == type)
- return &data[i];
- return NULL;
-}
-
-static size_t
-iov_enc_data_len(krb5_crypto_iov *data, int num_data)
-{
- size_t i, len;
-
- for (len = 0, i = 0; i < num_data; i++) {
- if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
- continue;
- len += data[i].data.length;
- }
-
- return len;
-}
-
-static size_t
-iov_sign_data_len(krb5_crypto_iov *data, int num_data)
-{
- size_t i, len;
-
- for (len = 0, i = 0; i < num_data; i++) {
- /* Can't use should_sign, because we must only count data, not
- * header/trailer */
- if (data[i].flags == KRB5_CRYPTO_TYPE_DATA ||
- data[i].flags == KRB5_CRYPTO_TYPE_SIGN_ONLY)
- len += data[i].data.length;
- }
-
- return len;
-}
-
-static krb5_error_code
-iov_coalesce(krb5_context context,
- krb5_data *prefix,
- krb5_crypto_iov *data,
- int num_data,
- krb5_boolean inc_sign_data,
- krb5_data *out)
-{
- unsigned char *p, *q;
- krb5_crypto_iov *hiv, *piv;
- size_t len;
- unsigned int i;
-
- hiv = iov_find(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
-
- piv = iov_find(data, num_data, KRB5_CRYPTO_TYPE_PADDING);
-
- len = 0;
- if (prefix)
- len += prefix->length;
- len += hiv->data.length;
- if (inc_sign_data)
- len += iov_sign_data_len(data, num_data);
- else
- len += iov_enc_data_len(data, num_data);
- if (piv)
- len += piv->data.length;
-
- p = q = malloc(len);
- if (p == NULL)
- return krb5_enomem(context);
-
- if (prefix) {
- memcpy(q, prefix->data, prefix->length);
- q += prefix->length;
- }
- 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 ||
- (inc_sign_data && data[i].flags == KRB5_CRYPTO_TYPE_SIGN_ONLY)) {
- memcpy(q, data[i].data.data, data[i].data.length);
- q += data[i].data.length;
- }
- }
- if (piv)
- memset(q, 0, piv->data.length);
-
- out->length = len;
- out->data = p;
-
- return 0;
-}
-
-static krb5_error_code
-iov_uncoalesce(krb5_context context,
- krb5_data *enc_data,
- krb5_crypto_iov *data,
- int num_data)
-{
- unsigned char *q = enc_data->data;
- krb5_crypto_iov *hiv, *piv;
- unsigned int i;
-
- hiv = iov_find(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
-
- piv = iov_find(data, num_data, KRB5_CRYPTO_TYPE_PADDING);
-
- 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, piv->data.length);
-
- return 0;
-}
-
-static krb5_error_code
-iov_pad_validate(const struct _krb5_encryption_type *et,
- krb5_crypto_iov *data,
- int num_data,
- krb5_crypto_iov **ppiv)
-{
- krb5_crypto_iov *piv;
- size_t sz, headersz, block_sz, pad_sz, len;
-
- len = iov_enc_data_len(data, num_data);
-
- headersz = et->confoundersize;
-
- sz = headersz + len;
- block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
-
- pad_sz = block_sz - sz;
-
- piv = iov_find(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, 0, pad_sz);
- else
- piv = NULL;
- }
-
- *ppiv = piv;
- return 0;
-}
-
-/**
- * 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_encrypt_iov_ivec(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- krb5_crypto_iov *data,
- int num_data,
- void *ivec)
-{
- size_t headersz, trailersz;
- Checksum cksum;
- krb5_data enc_data, sign_data;
- krb5_error_code ret;
- struct _krb5_key_data *dkey;
- const struct _krb5_encryption_type *et = crypto->et;
- krb5_crypto_iov *tiv, *piv, *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;
- }
-
- krb5_data_zero(&enc_data);
- krb5_data_zero(&sign_data);
-
- headersz = et->confoundersize;
- trailersz = CHECKSUMSIZE(et->keyed_checksum);
-
- /* header */
- hiv = iov_find(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 */
- ret = iov_pad_validate(et, data, num_data, &piv);
- if(ret)
- goto cleanup;
-
- /* trailer */
- tiv = iov_find(data, num_data, KRB5_CRYPTO_TYPE_TRAILER);
- if (tiv == NULL || tiv->data.length != trailersz) {
- ret = KRB5_BAD_MSIZE;
- goto cleanup;
- }
-
- if (et->flags & F_ENC_THEN_CKSUM) {
- unsigned char old_ivec[EVP_MAX_IV_LENGTH];
- krb5_data ivec_data;
-
- heim_assert(et->blocksize <= sizeof(old_ivec),
- "blocksize too big for ivec buffer");
-
- ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
- if(ret)
- goto cleanup;
-
- ret = _key_schedule(context, dkey);
- if(ret)
- goto cleanup;
-
- if (ivec)
- memcpy(old_ivec, ivec, et->blocksize);
- else
- memset(old_ivec, 0, et->blocksize);
-
- if (et->encrypt_iov != NULL) {
- ret = (*et->encrypt_iov)(context, dkey, data, num_data, 1, usage,
- ivec);
- if (ret)
- goto cleanup;
- } else {
- ret = iov_coalesce(context, NULL, data, num_data, FALSE, &enc_data);
- if (ret)
- goto cleanup;
-
- ret = (*et->encrypt)(context, dkey, enc_data.data, enc_data.length,
- 1, usage, ivec);
- if (ret)
- goto cleanup;
-
- ret = iov_uncoalesce(context, &enc_data, data, num_data);
- if (ret)
- goto cleanup;
- }
-
- ivec_data.length = et->blocksize;
- ivec_data.data = old_ivec;
-
- ret = iov_coalesce(context, &ivec_data, data, num_data, TRUE, &sign_data);
- if(ret)
- goto cleanup;
-
- ret = create_checksum(context,
- et->keyed_checksum,
- crypto,
- INTEGRITY_USAGE(usage),
- sign_data.data,
- sign_data.length,
- 0,
- &cksum);
-
- if(ret == 0 && cksum.checksum.length != trailersz) {
- free_Checksum (&cksum);
- krb5_clear_error_message (context);
- ret = KRB5_CRYPTO_INTERNAL;
- }
- if (ret)
- goto cleanup;
-
- /* save cksum at end */
- memcpy(tiv->data.data, cksum.checksum.data, cksum.checksum.length);
- free_Checksum (&cksum);
-
- } else {
- cksum.checksum = tiv->data;
- ret = create_checksum_iov(context,
- et->keyed_checksum,
- crypto,
- INTEGRITY_USAGE(usage),
- data,
- num_data,
- 0,
- &cksum);
- if (ret)
- goto cleanup;
-
- /* create_checksum may realloc the derived key space, so any keys
- * obtained before it was called may no longer be valid */
- ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
- if(ret)
- goto cleanup;
-
- ret = _key_schedule(context, dkey);
- if(ret)
- goto cleanup;
-
- if (et->encrypt_iov != NULL) {
- ret = (*et->encrypt_iov)(context, dkey, data, num_data, 1, usage,
- ivec);
- if (ret)
- goto cleanup;
- } else {
- ret = iov_coalesce(context, NULL, data, num_data, FALSE, &enc_data);
- if (ret)
- goto cleanup;
-
- ret = (*et->encrypt)(context, dkey, enc_data.data, enc_data.length,
- 1, usage, ivec);
- if (ret)
- goto cleanup;
-
- ret = iov_uncoalesce(context, &enc_data, data, num_data);
- if (ret)
- goto cleanup;
- }
- }
-
-cleanup:
- if (enc_data.data) {
- memset_s(enc_data.data, enc_data.length, 0, enc_data.length);
- krb5_data_free(&enc_data);
- }
- if (sign_data.data) {
- memset_s(sign_data.data, sign_data.length, 0, sign_data.length);
- krb5_data_free(&sign_data);
- }
- 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_decrypt_iov_ivec(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- krb5_crypto_iov *data,
- unsigned int num_data,
- void *ivec)
-{
- Checksum cksum;
- krb5_data enc_data, sign_data;
- krb5_error_code ret;
- struct _krb5_key_data *dkey;
- struct _krb5_encryption_type *et = crypto->et;
- krb5_crypto_iov *tiv, *hiv;
-
- if(!derived_crypto(context, crypto)) {
- krb5_clear_error_message(context);
- return KRB5_CRYPTO_INTERNAL;
- }
-
- /* header */
- hiv = iov_find(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
- if (hiv == NULL || hiv->data.length != et->confoundersize)
- return KRB5_BAD_MSIZE;
-
- /* trailer */
- tiv = iov_find(data, num_data, KRB5_CRYPTO_TYPE_TRAILER);
- if (tiv->data.length != CHECKSUMSIZE(et->keyed_checksum))
- return KRB5_BAD_MSIZE;
-
- /* padding */
- if ((iov_enc_data_len(data, num_data) % et->padsize) != 0) {
- krb5_clear_error_message(context);
- return KRB5_BAD_MSIZE;
- }
-
- krb5_data_zero(&enc_data);
- krb5_data_zero(&sign_data);
-
- if (!(et->flags & F_ENC_THEN_CKSUM)) {
- ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
- if(ret)
- goto cleanup;
-
- ret = _key_schedule(context, dkey);
- if(ret)
- goto cleanup;
-
- if (et->encrypt_iov != NULL) {
- ret = (*et->encrypt_iov)(context, dkey, data, num_data,
- 0, usage, ivec);
- if(ret)
- goto cleanup;
- } else {
- ret = iov_coalesce(context, NULL, data, num_data, FALSE, &enc_data);
- if(ret)
- goto cleanup;
-
- ret = (*et->encrypt)(context, dkey, enc_data.data, enc_data.length,
- 0, usage, ivec);
- if(ret)
- goto cleanup;
-
- ret = iov_uncoalesce(context, &enc_data, data, num_data);
- if(ret)
- goto cleanup;
- }
-
- cksum.checksum.data = tiv->data.data;
- cksum.checksum.length = tiv->data.length;
- cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
-
- ret = verify_checksum_iov(context, crypto, INTEGRITY_USAGE(usage),
- data, num_data, 0, &cksum);
- if(ret)
- goto cleanup;
- } else {
- krb5_data ivec_data;
- static unsigned char zero_ivec[EVP_MAX_IV_LENGTH];
-
- heim_assert(et->blocksize <= sizeof(zero_ivec),
- "blocksize too big for ivec buffer");
-
- ivec_data.length = et->blocksize;
- ivec_data.data = ivec ? ivec : zero_ivec;
-
- ret = iov_coalesce(context, &ivec_data, data, num_data, TRUE, &sign_data);
- if(ret)
- goto cleanup;
-
- 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),
- sign_data.data,
- sign_data.length,
- 0,
- &cksum);
- if(ret)
- goto cleanup;
-
- ret = iov_coalesce(context, NULL, data, num_data, FALSE, &enc_data);
- if(ret)
- goto cleanup;
-
- ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
- if(ret)
- goto cleanup;
-
- ret = _key_schedule(context, dkey);
- if(ret)
- goto cleanup;
-
- ret = (*et->encrypt)(context, dkey, enc_data.data, enc_data.length,
- 0, usage, ivec);
- if(ret)
- goto cleanup;
-
- ret = iov_uncoalesce(context, &enc_data, data, num_data);
- if(ret)
- goto cleanup;
- }
-
-cleanup:
- if (enc_data.data) {
- memset_s(enc_data.data, enc_data.length, 0, enc_data.length);
- krb5_data_free(&enc_data);
- }
- if (sign_data.data) {
- memset_s(sign_data.data, sign_data.length, 0, sign_data.length);
- krb5_data_free(&sign_data);
- }
- 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-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;
- struct _krb5_checksum_type *ct;
- unsigned keyusage;
- krb5_error_code ret;
-
- civ = iov_find(data, num_data, KRB5_CRYPTO_TYPE_CHECKSUM);
- if (civ == NULL)
- return KRB5_BAD_MSIZE;
-
- ct = crypto->et->keyed_checksum;
- if (ct == NULL)
- ct = crypto->et->checksum;
-
- if(ct == NULL) {
- krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
- N_("checksum type not found", ""));
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
-
- if (arcfour_checksum_p(ct, crypto)) {
- keyusage = usage;
- _krb5_usage2arcfour(context, &keyusage);
- } else
- keyusage = CHECKSUM_USAGE(usage);
-
- if (ct->checksumsize > civ->data.length) {
- krb5_set_error_message(context, KRB5_BAD_MSIZE,
- N_("Checksum larger then input buffer", ""));
- return KRB5_BAD_MSIZE;
- }
-
- cksum.checksum = civ->data;
- ret = create_checksum_iov(context, ct, crypto, keyusage,
- data, num_data, crypto_flags(crypto), &cksum);
-
- if (ret == 0 && type)
- *type = cksum.cksumtype;
-
- return ret;
-}
-
-/**
- * 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_verify_checksum_iov(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- krb5_crypto_iov *data,
- unsigned int num_data,
- krb5_cksumtype *type)
-{
- struct _krb5_encryption_type *et = crypto->et;
- struct _krb5_checksum_type *ct;
- Checksum cksum;
- krb5_crypto_iov *civ;
- krb5_error_code ret;
- unsigned keyusage;
-
- civ = iov_find(data, num_data, KRB5_CRYPTO_TYPE_CHECKSUM);
- if (civ == NULL)
- return KRB5_BAD_MSIZE;
-
- cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
- cksum.checksum.length = civ->data.length;
- cksum.checksum.data = civ->data.data;
-
- ct = _krb5_find_checksum(cksum.cksumtype);
- if(ct == NULL) {
- krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
- N_("checksum type %d not supported", ""),
- cksum.cksumtype);
- return KRB5_PROG_SUMTYPE_NOSUPP;
- }
-
- if (arcfour_checksum_p(ct, crypto)) {
- keyusage = usage;
- _krb5_usage2arcfour(context, &keyusage);
- } else
- keyusage = CHECKSUM_USAGE(usage);
-
- ret = verify_checksum_iov(context, crypto, keyusage, data, num_data,
- crypto_flags(crypto), &cksum);
-
- if (ret == 0 && type)
- *type = cksum.cksumtype;
-
- return ret;
-}
-
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_length_iov(krb5_context context,
- krb5_crypto crypto,
- krb5_crypto_iov *data,
- unsigned int num_data)
-{
- krb5_error_code ret;
- size_t 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_encrypt_ivec(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- const void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- krb5_error_code ret;
-
- switch (crypto->et->flags & F_CRYPTO_MASK) {
- case F_RFC3961_ENC:
- ret = encrypt_internal_derived(context, crypto, usage,
- data, len, result, ivec);
- break;
- case F_SPECIAL:
- ret = encrypt_internal_special (context, crypto, usage,
- data, len, result, ivec);
- break;
- case F_ENC_THEN_CKSUM:
- ret = encrypt_internal_enc_then_cksum(context, crypto, usage,
- data, len, result, ivec);
- break;
- default:
- ret = encrypt_internal(context, crypto, data, len, result, ivec);
- break;
- }
-
- return ret;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_decrypt_ivec(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- void *data,
- size_t len,
- krb5_data *result,
- void *ivec)
-{
- krb5_error_code ret;
-
- switch (crypto->et->flags & F_CRYPTO_MASK) {
- case F_RFC3961_ENC:
- ret = decrypt_internal_derived(context, crypto, usage,
- data, len, result, ivec);
- break;
- case F_SPECIAL:
- ret = decrypt_internal_special(context, crypto, usage,
- data, len, result, ivec);
- break;
- case F_ENC_THEN_CKSUM:
- ret = decrypt_internal_enc_then_cksum(context, crypto, usage,
- data, len, result, ivec);
- break;
- default:
- ret = decrypt_internal(context, crypto, data, len, result, ivec);
- break;
- }
-
- return ret;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-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);
-}
-
-/************************************************************
- * *
- ************************************************************/
-
-static krb5_error_code
-derive_key_rfc3961(krb5_context context,
- struct _krb5_encryption_type *et,
- struct _krb5_key_data *key,
- const void *constant,
- size_t len)
-{
-
- unsigned char *k = NULL;
- unsigned int nblocks = 0, i;
- krb5_error_code ret = 0;
- struct _krb5_key_type *kt = et->keytype;
-
- 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) {
- ret = krb5_enomem(context);
- goto out;
- }
- ret = _krb5_n_fold(constant, len, k, et->blocksize);
- if (ret) {
- krb5_enomem(context);
- goto out;
- }
-
- for(i = 0; i < nblocks; i++) {
- if(i > 0)
- memcpy(k + i * et->blocksize,
- k + (i - 1) * et->blocksize,
- et->blocksize);
- ret = (*et->encrypt)(context, key, k + i * et->blocksize,
- et->blocksize, 1, 0, NULL);
- if (ret) {
- krb5_set_error_message(context, ret, N_("encrypt failed", ""));
- goto out;
- }
- }
- } else {
- /* this case is probably broken, but won't be run anyway */
- void *c = malloc(len);
- size_t res_len = (kt->bits + 7) / 8;
-
- if(len != 0 && c == NULL) {
- ret = krb5_enomem(context);
- goto out;
- }
- memcpy(c, constant, len);
- ret = (*et->encrypt)(context, key, c, len, 1, 0, NULL);
- if (ret) {
- free(c);
- krb5_set_error_message(context, ret, N_("encrypt failed", ""));
- goto out;
- }
- k = malloc(res_len);
- if(res_len != 0 && k == NULL) {
- free(c);
- ret = krb5_enomem(context);
- goto out;
- }
- ret = _krb5_n_fold(c, len, k, res_len);
- free(c);
- if (ret) {
- krb5_enomem(context);
- goto out;
- }
- }
-
- if (kt->type == KRB5_ENCTYPE_OLD_DES3_CBC_SHA1)
- _krb5_DES3_random_to_key(context, key->key, k, nblocks * et->blocksize);
- else
- memcpy(key->key->keyvalue.data, k, key->key->keyvalue.length);
-
- out:
- if (k) {
- memset_s(k, nblocks * et->blocksize, 0, nblocks * et->blocksize);
- free(k);
- }
- return ret;
-}
-
-static krb5_error_code
-derive_key_sp800_hmac(krb5_context context,
- struct _krb5_encryption_type *et,
- struct _krb5_key_data *key,
- const void *constant,
- size_t len)
-{
- krb5_error_code ret;
- struct _krb5_key_type *kt = et->keytype;
- krb5_data label;
- const EVP_MD *md = NULL;
- const unsigned char *c = constant;
- size_t key_len;
- krb5_data K1;
-
- ret = _krb5_aes_sha2_md_for_enctype(context, kt->type, &md);
- if (ret)
- return ret;
-
- /*
- * PRF usage: not handled here (output cannot be longer)
- * Integrity usage: truncated hash (half length)
- * Encryption usage: base key length
- */
- if (len == 5 && (c[4] == 0x99 || c[4] == 0x55))
- key_len = EVP_MD_size(md) / 2;
- else
- key_len = kt->size;
-
- ret = krb5_data_alloc(&K1, key_len);
- if (ret)
- return ret;
-
- label.data = (void *)constant;
- label.length = len;
-
- ret = _krb5_SP800_108_HMAC_KDF(context, &key->key->keyvalue,
- &label, NULL, md, &K1);
- if (ret == 0) {
- if (key->key->keyvalue.length > key_len)
- key->key->keyvalue.length = key_len;
- memcpy(key->key->keyvalue.data, K1.data, key_len);
- }
-
- memset_s(K1.data, K1.length, 0, K1.length);
- krb5_data_free(&K1);
-
- return ret;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-_krb5_derive_key(krb5_context context,
- struct _krb5_encryption_type *et,
- struct _krb5_key_data *key,
- const void *constant,
- size_t len)
-{
- krb5_error_code ret;
-
- ret = _key_schedule(context, key);
- if(ret)
- return ret;
-
- switch (et->flags & F_KDF_MASK) {
- case F_RFC3961_KDF:
- ret = derive_key_rfc3961(context, et, key, constant, len);
- break;
- case F_SP800_108_HMAC_KDF:
- ret = derive_key_sp800_hmac(context, et, key, constant, len);
- break;
- default:
- ret = KRB5_CRYPTO_INTERNAL;
- krb5_set_error_message(context, ret,
- N_("derive_key() called with unknown keytype (%u)", ""),
- et->keytype->type);
- break;
- }
-
- if (key->schedule) {
- free_key_schedule(context, key, et);
- key->schedule = NULL;
- }
-
- return ret;
-}
-
-static struct _krb5_key_data *
-_new_derived_key(krb5_crypto crypto, unsigned usage)
-{
- struct _krb5_key_usage *d = crypto->key_usage;
- d = realloc(d, (crypto->num_key_usage + 1) * sizeof(*d));
- if(d == NULL)
- return NULL;
- crypto->key_usage = d;
- d += crypto->num_key_usage++;
- memset(d, 0, sizeof(*d));
- d->usage = usage;
- return &d->key;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_derive_key(krb5_context context,
- const krb5_keyblock *key,
- krb5_enctype etype,
- const void *constant,
- size_t constant_len,
- krb5_keyblock **derived_key)
-{
- krb5_error_code ret;
- struct _krb5_encryption_type *et;
- struct _krb5_key_data d;
-
- *derived_key = NULL;
-
- et = _krb5_find_enctype (etype);
- if (et == NULL) {
- return unsupported_enctype (context, etype);
- }
-
- ret = krb5_copy_keyblock(context, key, &d.key);
- if (ret)
- return ret;
-
- d.schedule = NULL;
- ret = _krb5_derive_key(context, et, &d, constant, constant_len);
- if (ret == 0)
- ret = krb5_copy_keyblock(context, d.key, derived_key);
- _krb5_free_key_data(context, &d, et);
- return ret;
-}
-
-static krb5_error_code
-_get_derived_key(krb5_context context,
- krb5_crypto crypto,
- unsigned usage,
- struct _krb5_key_data **key)
-{
- int i;
- struct _krb5_key_data *d;
- unsigned char constant[5];
-
- *key = NULL;
- for(i = 0; i < crypto->num_key_usage; i++)
- if(crypto->key_usage[i].usage == usage) {
- *key = &crypto->key_usage[i].key;
- return 0;
- }
- d = _new_derived_key(crypto, usage);
- if (d == NULL)
- return krb5_enomem(context);
- *key = d;
- krb5_copy_keyblock(context, crypto->key.key, &d->key);
- _krb5_put_int(constant, usage, sizeof(constant));
- return _krb5_derive_key(context, crypto->et, d, constant, sizeof(constant));
-}
-
-/**
- * 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_init(krb5_context context,
- const krb5_keyblock *key,
- krb5_enctype etype,
- krb5_crypto *crypto)
-{
- krb5_error_code ret;
- ALLOC(*crypto, 1);
- if (*crypto == NULL)
- return krb5_enomem(context);
- if(etype == (krb5_enctype)ETYPE_NULL)
- etype = key->keytype;
- (*crypto)->et = _krb5_find_enctype(etype);
- if((*crypto)->et == NULL || ((*crypto)->et->flags & F_DISABLED)) {
- free(*crypto);
- *crypto = NULL;
- return unsupported_enctype(context, etype);
- }
- if((*crypto)->et->keytype->size != key->keyvalue.length) {
- free(*crypto);
- *crypto = NULL;
- 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);
- if(ret) {
- free(*crypto);
- *crypto = NULL;
- return ret;
- }
- (*crypto)->key.schedule = NULL;
- (*crypto)->num_key_usage = 0;
- (*crypto)->key_usage = NULL;
- (*crypto)->flags = 0;
- return 0;
-}
-
-static void
-free_key_schedule(krb5_context context,
- struct _krb5_key_data *key,
- struct _krb5_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);
-}
-
-KRB5_LIB_FUNCTION void KRB5_LIB_CALL
-_krb5_free_key_data(krb5_context context, struct _krb5_key_data *key,
- struct _krb5_encryption_type *et)
-{
- krb5_free_keyblock(context, key->key);
- if(key->schedule) {
- free_key_schedule(context, key, et);
- key->schedule = NULL;
- }
-}
-
-static void
-free_key_usage(krb5_context context, struct _krb5_key_usage *ku,
- struct _krb5_encryption_type *et)
-{
- _krb5_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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-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], crypto->et);
- free(crypto->key_usage);
- _krb5_free_key_data(context, &crypto->key, crypto->et);
-
- if (crypto->mdctx)
- EVP_MD_CTX_destroy(crypto->mdctx);
-
- if (crypto->hmacctx)
- HMAC_CTX_free(crypto->hmacctx);
-
- free (crypto);
- return 0;
-}
-
-/**
- * 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_getblocksize(krb5_context context,
- krb5_crypto crypto,
- size_t *blocksize)
-{
- *blocksize = crypto->et->blocksize;
- 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_getenctype(krb5_context context,
- krb5_crypto crypto,
- krb5_enctype *enctype)
-{
- *enctype = crypto->et->type;
- 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_getpadsize(krb5_context context,
- krb5_crypto crypto,
- 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_getconfoundersize(krb5_context context,
- krb5_crypto crypto,
- size_t *confoundersize)
-{
- *confoundersize = crypto->et->confoundersize;
- 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_enctype_disable(krb5_context context,
- krb5_enctype enctype)
-{
- struct _krb5_encryption_type *et = _krb5_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;
-}
-
-/**
- * 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_enctype_enable(krb5_context context,
- krb5_enctype enctype)
-{
- struct _krb5_encryption_type *et = _krb5_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;
-}
-
-/**
- * Enable or disable all weak encryption types
- *
- * @param context Kerberos 5 context
- * @param enable true to enable, false to disable
- *
- * @return Return an error code or 0.
- *
- * @ingroup krb5_crypto
- */
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_allow_weak_crypto(krb5_context context,
- krb5_boolean enable)
-{
- int i;
-
- for(i = 0; i < _krb5_num_etypes; i++)
- if(_krb5_etypes[i]->flags & F_WEAK) {
- if(enable)
- _krb5_etypes[i]->flags &= ~F_DISABLED;
- else
- _krb5_etypes[i]->flags |= F_DISABLED;
- }
- return 0;
-}
-
-/**
- * Returns is the encryption is strong or weak
- *
- * @param context Kerberos 5 context
- * @param enctype encryption type to probe
- *
- * @return Returns true if encryption type is weak or is not supported.
- *
- * @ingroup krb5_crypto
- */
-
-KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
-krb5_is_enctype_weak(krb5_context context, krb5_enctype enctype)
-{
- struct _krb5_encryption_type *et = _krb5_find_enctype(enctype);
- if(et == NULL || (et->flags & F_WEAK))
- return TRUE;
- return FALSE;
-}
-
-/**
- * Returns whether the encryption type is new or old
- *
- * @param context Kerberos 5 context
- * @param enctype encryption type to probe
- *
- * @return Returns true if encryption type is old or is not supported.
- *
- * @ingroup krb5_crypto
- */
-
-KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
-krb5_is_enctype_old(krb5_context context, krb5_enctype enctype)
-{
- struct _krb5_encryption_type *et = _krb5_find_enctype(enctype);
- if (!et || (et->flags & F_OLD))
- return TRUE;
- return FALSE;
-}
-
-/**
- * Returns whether the encryption type should use randomly generated salts
- *
- * @param context Kerberos 5 context
- * @param enctype encryption type to probe
- *
- * @return Returns true if generated salts should have random component
- *
- * @ingroup krb5_crypto
- */
-KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
-_krb5_enctype_requires_random_salt(krb5_context context,
- krb5_enctype enctype)
-{
- struct _krb5_encryption_type *et;
-
- et = _krb5_find_enctype (enctype);
-
- return et && (et->flags & F_SP800_108_HMAC_KDF);
-}
-
-static size_t
-wrapped_length (krb5_context context,
- krb5_crypto crypto,
- size_t data_len)
-{
- struct _krb5_encryption_type *et = crypto->et;
- size_t padsize = et->padsize;
- size_t checksumsize = CHECKSUMSIZE(et->checksum);
- size_t res;
-
- res = et->confoundersize + checksumsize + data_len;
- res = (res + padsize - 1) / padsize * padsize;
- return res;
-}
-
-static size_t
-wrapped_length_dervied (krb5_context context,
- krb5_crypto crypto,
- size_t data_len)
-{
- struct _krb5_encryption_type *et = crypto->et;
- size_t padsize = et->padsize;
- size_t res;
-
- res = et->confoundersize + data_len;
- res = (res + padsize - 1) / padsize * padsize;
- if (et->keyed_checksum)
- res += et->keyed_checksum->checksumsize;
- else
- res += et->checksum->checksumsize;
- return res;
-}
-
-/*
- * Return the size of an encrypted packet of length `data_len'
- */
-
-KRB5_LIB_FUNCTION size_t KRB5_LIB_CALL
-krb5_get_wrapped_length (krb5_context context,
- krb5_crypto crypto,
- size_t data_len)
-{
- if (derived_crypto (context, crypto))
- return wrapped_length_dervied (context, crypto, data_len);
- else
- 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 _krb5_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 _krb5_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;
-}
-
-KRB5_LIB_FUNCTION size_t KRB5_LIB_CALL
-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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_random_to_key(krb5_context context,
- krb5_enctype type,
- const void *data,
- size_t size,
- krb5_keyblock *key)
-{
- krb5_error_code ret;
- struct _krb5_encryption_type *et = _krb5_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;
- }
- if ((et->keytype->bits + 7) / 8 > 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)
- return ret;
- key->keytype = type;
- if (et->keytype->random_to_key)
- (*et->keytype->random_to_key)(context, key, data, size);
- else
- memcpy(key->keyvalue.data, data, et->keytype->size);
-
- return 0;
-}
-
-
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_prf_length(krb5_context context,
- krb5_enctype type,
- size_t *length)
-{
- struct _krb5_encryption_type *et = _krb5_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;
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_prf(krb5_context context,
- const krb5_crypto crypto,
- const krb5_data *input,
- krb5_data *output)
-{
- struct _krb5_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);
-}
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_crypto_prfplus(krb5_context context,
- const krb5_crypto crypto,
- const krb5_data *input,
- size_t length,
- krb5_data *output)
-{
- krb5_error_code ret;
- krb5_data input2;
- unsigned char i = 1;
- unsigned char *p;
-
- krb5_data_zero(&input2);
- krb5_data_zero(output);
-
- krb5_clear_error_message(context);
-
- ret = krb5_data_alloc(output, length);
- if (ret) goto out;
- ret = krb5_data_alloc(&input2, input->length + 1);
- if (ret) goto out;
-
- 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 ret;
-}
-
-/**
- * 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-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;
- krb5_data os1, os2;
- size_t i, keysize;
-
- memset(res, 0, sizeof(*res));
- krb5_data_zero(&os1);
- krb5_data_zero(&os2);
-
- ret = krb5_enctype_keybits(context, enctype, &keysize);
- if (ret)
- return ret;
- keysize = (keysize + 7) / 8;
-
- 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;
-
- res->keytype = enctype;
- {
- unsigned char *p1 = os1.data, *p2 = os2.data;
- for (i = 0; i < keysize; i++)
- p1[i] ^= p2[i];
- }
- ret = krb5_random_to_key(context, enctype, os1.data, keysize, res);
- out:
- krb5_data_free(&os1);
- krb5_data_free(&os2);
-
- return ret;
-}
-
-KRB5_LIB_FUNCTION void KRB5_LIB_CALL
-_krb5_crypto_set_flags(krb5_context context,
- krb5_crypto crypto,
- krb5_flags flags)
-{
- crypto->flags |= flags;
-}
-
-#ifndef HEIMDAL_SMALLER
-
-/**
- * Deprecated: keytypes doesn't exists, they are really enctypes.
- *
- * @ingroup krb5_deprecated
- */
-
-KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
-krb5_keytype_to_enctypes (krb5_context context,
- krb5_keytype keytype,
- unsigned *len,
- krb5_enctype **val)
- KRB5_DEPRECATED_FUNCTION("Use X instead")
-{
- int i;
- unsigned n = 0;
- krb5_enctype *ret;
-
- for (i = _krb5_num_etypes - 1; i >= 0; --i) {
- if (_krb5_etypes[i]->keytype->type == keytype
- && !(_krb5_etypes[i]->flags & F_PSEUDO)
- && krb5_enctype_valid(context, _krb5_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)
- return krb5_enomem(context);
- n = 0;
- for (i = _krb5_num_etypes - 1; i >= 0; --i) {
- if (_krb5_etypes[i]->keytype->type == keytype
- && !(_krb5_etypes[i]->flags & F_PSEUDO)
- && krb5_enctype_valid(context, _krb5_etypes[i]->type) == 0)
- ret[n++] = _krb5_etypes[i]->type;
- }
- *len = n;
- *val = ret;
- return 0;
-}
-
-/**
- * Deprecated: keytypes doesn't exists, they are really enctypes.
- *
- * @ingroup krb5_deprecated
- */
-
-/* if two enctypes have compatible keys */
-KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
-krb5_enctypes_compatible_keys(krb5_context context,
- krb5_enctype etype1,
- krb5_enctype etype2)
- KRB5_DEPRECATED_FUNCTION("Use X instead")
-{
- struct _krb5_encryption_type *e1 = _krb5_find_enctype(etype1);
- struct _krb5_encryption_type *e2 = _krb5_find_enctype(etype2);
- return e1 != NULL && e2 != NULL && e1->keytype == e2->keytype;
-}
-
-#endif /* HEIMDAL_SMALLER */
git.samba.org / samba.git / blobdiff