#include "includes.h"
#include "system/filesys.h"
#include "krb5_samba.h"
-#include "lib/util/asn1.h"
+#include "lib/crypto/crypto.h"
+#include "../libds/common/flags.h"
#ifdef HAVE_COM_ERR_H
#include <com_err.h>
*
* @param[out] pkaddr A Kerberos address to store tha address in.
*
- * @return True on success, false if an error occured.
+ * @return True on success, false if an error occurred.
*/
bool smb_krb5_sockaddr_to_kaddr(struct sockaddr_storage *paddr,
krb5_address *pkaddr)
{
memset(pkaddr, '\0', sizeof(krb5_address));
-#if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
+#ifdef HAVE_IPV6
if (paddr->ss_family == AF_INET6) {
pkaddr->addr_type = KRB5_ADDRESS_INET6;
pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
*
* @param[in] pkaddr A Kerberos address to store tha address in.
*
- * @return True on success, false if an error occured.
+ * @return True on success, false if an error occurred.
*/
bool smb_krb5_sockaddr_to_kaddr(struct sockaddr_storage *paddr,
krb5_address *pkaddr)
{
memset(pkaddr, '\0', sizeof(krb5_address));
-#if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
+#ifdef HAVE_IPV6
if (paddr->ss_family == AF_INET6) {
pkaddr->addrtype = ADDRTYPE_INET6;
pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
krb5_error_code error_code,
const char *e_text,
krb5_data *e_data,
+ const krb5_principal client,
+ const krb5_principal server,
krb5_data *enc_err)
{
krb5_error_code code = EINVAL;
error_code,
e_text,
e_data,
- NULL, /* client */
- NULL, /* server */
+ client,
+ server,
NULL, /* client_time */
NULL, /* client_usec */
enc_err);
#else
- krb5_error dec_err = {
- .error = error_code,
- };
+ krb5_principal unspec_server = NULL;
+ krb5_error errpkt;
+ errpkt.ctime = 0;
+ errpkt.cusec = 0;
+
+ code = krb5_us_timeofday(context,
+ &errpkt.stime,
+ &errpkt.susec);
+ if (code != 0) {
+ return code;
+ }
+
+ errpkt.error = error_code;
+
+ errpkt.text.length = 0;
if (e_text != NULL) {
- dec_err.text.length = strlen(e_text);
- dec_err.text.data = discard_const_p(char, e_text);
+ errpkt.text.length = strlen(e_text);
+ errpkt.text.data = discard_const_p(char, e_text);
}
+
+ errpkt.e_data.magic = KV5M_DATA;
+ errpkt.e_data.length = 0;
+ errpkt.e_data.data = NULL;
if (e_data != NULL) {
- dec_err.e_data = *e_data;
+ errpkt.e_data = *e_data;
+ }
+
+ errpkt.client = client;
+
+ if (server != NULL) {
+ errpkt.server = server;
+ } else {
+ code = smb_krb5_make_principal(context,
+ &unspec_server,
+ "<unspecified realm>",
+ NULL);
+ if (code != 0) {
+ return code;
+ }
+ errpkt.server = unspec_server;
}
code = krb5_mk_error(context,
- &dec_err,
+ &errpkt,
enc_err);
+ krb5_free_principal(context, unspec_server);
#endif
return code;
}
return -1;
}
+ if ((int)enctype == (int)ENCTYPE_ARCFOUR_HMAC) {
+ TALLOC_CTX *frame = talloc_stackframe();
+ uint8_t *utf16 = NULL;
+ size_t utf16_size = 0;
+ uint8_t nt_hash[16];
+ bool ok;
+
+ ok = convert_string_talloc(frame, CH_UNIX, CH_UTF16LE,
+ password->data, password->length,
+ (void **)&utf16, &utf16_size);
+ if (!ok) {
+ if (errno == 0) {
+ errno = EINVAL;
+ }
+ ret = errno;
+ TALLOC_FREE(frame);
+ return ret;
+ }
+
+ mdfour(nt_hash, utf16, utf16_size);
+ memset(utf16, 0, utf16_size);
+ ret = smb_krb5_keyblock_init_contents(context,
+ ENCTYPE_ARCFOUR_HMAC,
+ nt_hash,
+ sizeof(nt_hash),
+ key);
+ ZERO_STRUCT(nt_hash);
+ if (ret != 0) {
+ TALLOC_FREE(frame);
+ return ret;
+ }
+
+ TALLOC_FREE(frame);
+ return 0;
+ }
+
#if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_C_STRING_TO_KEY)
{/* MIT */
krb5_data _salt;
#error UNKNOWN_SALT_FUNCTIONS
#endif
+/**
+ * @brief This constructs the salt principal used by active directory
+ *
+ * Most Kerberos encryption types require a salt in order to
+ * calculate the long term private key for user/computer object
+ * based on a password.
+ *
+ * The returned _salt_principal is a string in forms like this:
+ * - host/somehost.example.com@EXAMPLE.COM
+ * - SomeAccount@EXAMPLE.COM
+ * - SomePrincipal@EXAMPLE.COM
+ *
+ * This is not the form that's used as salt, it's just
+ * the human readable form. It needs to be converted by
+ * smb_krb5_salt_principal2data().
+ *
+ * @param[in] realm The realm the user/computer is added too.
+ *
+ * @param[in] sAMAccountName The sAMAccountName attribute of the object.
+ *
+ * @param[in] userPrincipalName The userPrincipalName attribute of the object
+ * or NULL is not available.
+ *
+ * @param[in] uac_flags UF_ACCOUNT_TYPE_MASKed userAccountControl field
+ *
+ * @param[in] mem_ctx The TALLOC_CTX to allocate _salt_principal.
+ *
+ * @param[out] _salt_principal The resulting principal as string.
+ *
+ * @retval 0 Success; otherwise - Kerberos error codes
+ *
+ * @see smb_krb5_salt_principal2data
+ */
+int smb_krb5_salt_principal(const char *realm,
+ const char *sAMAccountName,
+ const char *userPrincipalName,
+ uint32_t uac_flags,
+ TALLOC_CTX *mem_ctx,
+ char **_salt_principal)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ char *upper_realm = NULL;
+ const char *principal = NULL;
+ int principal_len = 0;
+
+ *_salt_principal = NULL;
+
+ if (sAMAccountName == NULL) {
+ TALLOC_FREE(frame);
+ return EINVAL;
+ }
+
+ if (realm == NULL) {
+ TALLOC_FREE(frame);
+ return EINVAL;
+ }
+
+ if (uac_flags & ~UF_ACCOUNT_TYPE_MASK) {
+ /*
+ * catch callers which still
+ * pass 'true'.
+ */
+ TALLOC_FREE(frame);
+ return EINVAL;
+ }
+ if (uac_flags == 0) {
+ /*
+ * catch callers which still
+ * pass 'false'.
+ */
+ TALLOC_FREE(frame);
+ return EINVAL;
+ }
+
+ upper_realm = strupper_talloc(frame, realm);
+ if (upper_realm == NULL) {
+ TALLOC_FREE(frame);
+ return ENOMEM;
+ }
+
+ /* Many, many thanks to lukeh@padl.com for this
+ * algorithm, described in his Nov 10 2004 mail to
+ * samba-technical@lists.samba.org */
+
+ /*
+ * Determine a salting principal
+ */
+ if (uac_flags & UF_TRUST_ACCOUNT_MASK) {
+ int computer_len = 0;
+ char *tmp = NULL;
+
+ computer_len = strlen(sAMAccountName);
+ if (sAMAccountName[computer_len-1] == '$') {
+ computer_len -= 1;
+ }
+
+ if (uac_flags & UF_INTERDOMAIN_TRUST_ACCOUNT) {
+ principal = talloc_asprintf(frame, "krbtgt/%*.*s",
+ computer_len, computer_len,
+ sAMAccountName);
+ if (principal == NULL) {
+ TALLOC_FREE(frame);
+ return ENOMEM;
+ }
+ } else {
+
+ tmp = talloc_asprintf(frame, "host/%*.*s.%s",
+ computer_len, computer_len,
+ sAMAccountName, realm);
+ if (tmp == NULL) {
+ TALLOC_FREE(frame);
+ return ENOMEM;
+ }
+
+ principal = strlower_talloc(frame, tmp);
+ TALLOC_FREE(tmp);
+ if (principal == NULL) {
+ TALLOC_FREE(frame);
+ return ENOMEM;
+ }
+ }
+
+ principal_len = strlen(principal);
+
+ } else if (userPrincipalName != NULL) {
+ char *p;
+
+ principal = userPrincipalName;
+ p = strchr(principal, '@');
+ if (p != NULL) {
+ principal_len = PTR_DIFF(p, principal);
+ } else {
+ principal_len = strlen(principal);
+ }
+ } else {
+ principal = sAMAccountName;
+ principal_len = strlen(principal);
+ }
+
+ *_salt_principal = talloc_asprintf(mem_ctx, "%*.*s@%s",
+ principal_len, principal_len,
+ principal, upper_realm);
+ if (*_salt_principal == NULL) {
+ TALLOC_FREE(frame);
+ return ENOMEM;
+ }
+
+ TALLOC_FREE(frame);
+ return 0;
+}
+
+/**
+ * @brief Converts the salt principal string into the salt data blob
+ *
+ * This function takes a salt_principal as string in forms like this:
+ * - host/somehost.example.com@EXAMPLE.COM
+ * - SomeAccount@EXAMPLE.COM
+ * - SomePrincipal@EXAMPLE.COM
+ *
+ * It generates values like:
+ * - EXAMPLE.COMhost/somehost.example.com
+ * - EXAMPLE.COMSomeAccount
+ * - EXAMPLE.COMSomePrincipal
+ *
+ * @param[in] realm The realm the user/computer is added too.
+ *
+ * @param[in] sAMAccountName The sAMAccountName attribute of the object.
+ *
+ * @param[in] userPrincipalName The userPrincipalName attribute of the object
+ * or NULL is not available.
+ *
+ * @param[in] is_computer The indication of the object includes
+ * objectClass=computer.
+ *
+ * @param[in] mem_ctx The TALLOC_CTX to allocate _salt_principal.
+ *
+ * @param[out] _salt_principal The resulting principal as string.
+ *
+ * @retval 0 Success; otherwise - Kerberos error codes
+ *
+ * @see smb_krb5_salt_principal
+ */
+int smb_krb5_salt_principal2data(krb5_context context,
+ const char *salt_principal,
+ TALLOC_CTX *mem_ctx,
+ char **_salt_data)
+{
+ krb5_error_code ret;
+ krb5_principal salt_princ = NULL;
+ krb5_data salt;
+
+ *_salt_data = NULL;
+
+ ret = krb5_parse_name(context, salt_principal, &salt_princ);
+ if (ret != 0) {
+ return ret;
+ }
+
+ ret = smb_krb5_get_pw_salt(context, salt_princ, &salt);
+ krb5_free_principal(context, salt_princ);
+ if (ret != 0) {
+ return ret;
+ }
+
+ *_salt_data = talloc_strndup(mem_ctx,
+ (char *)salt.data,
+ salt.length);
+ smb_krb5_free_data_contents(context, &salt);
+ if (*_salt_data == NULL) {
+ return ENOMEM;
+ }
+
+ return 0;
+}
+
#if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
/**
* @brief Get a list of encryption types allowed for session keys
#error UNKNOWN_GET_ENCTYPES_FUNCTIONS
#endif
-bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
- DATA_BLOB *edata,
- DATA_BLOB *edata_out)
-{
- DATA_BLOB edata_contents;
- ASN1_DATA *data;
- int edata_type;
-
- if (!edata->length) {
- return false;
- }
-
- data = asn1_init(mem_ctx);
- if (data == NULL) {
- return false;
- }
-
- if (!asn1_load(data, *edata)) goto err;
- if (!asn1_start_tag(data, ASN1_SEQUENCE(0))) goto err;
- if (!asn1_start_tag(data, ASN1_CONTEXT(1))) goto err;
- if (!asn1_read_Integer(data, &edata_type)) goto err;
-
- if (edata_type != KRB5_PADATA_PW_SALT) {
- DEBUG(0,("edata is not of required type %d but of type %d\n",
- KRB5_PADATA_PW_SALT, edata_type));
- goto err;
- }
-
- if (!asn1_start_tag(data, ASN1_CONTEXT(2))) goto err;
- if (!asn1_read_OctetString(data, talloc_tos(), &edata_contents)) goto err;
- if (!asn1_end_tag(data)) goto err;
- if (!asn1_end_tag(data)) goto err;
- if (!asn1_end_tag(data)) goto err;
- asn1_free(data);
-
- *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
-
- data_blob_free(&edata_contents);
-
- return true;
-
- err:
-
- asn1_free(data);
- return false;
-}
-
-
-/**************************************************************
- krb5_parse_name that takes a UNIX charset.
-**************************************************************/
+/**
+ * @brief Convert a string principal name to a Kerberos principal.
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] name The principal as a unix charset string.
+ *
+ * @param[out] principal The newly allocated principal.
+ *
+ * Use krb5_free_principal() to free a principal when it is no longer needed.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
krb5_error_code smb_krb5_parse_name(krb5_context context,
- const char *name, /* in unix charset */
- krb5_principal *principal)
+ const char *name,
+ krb5_principal *principal)
{
krb5_error_code ret;
char *utf8_name;
return ret;
}
-/**************************************************************
- krb5_parse_name that returns a UNIX charset name. Must
- be freed with talloc_free() call.
-**************************************************************/
-
+/**
+ * @brief Convert a Kerberos principal structure to a string representation.
+ *
+ * The resulting string representation will be a unix charset name and is
+ * talloc'ed.
+ *
+ * @param[in] mem_ctx The talloc context to allocate memory on.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] principal The principal.
+ *
+ * @param[out] unix_name A string representation of the princpial name as with
+ * unix charset.
+ *
+ * Use talloc_free() to free the string representation if it is no longer
+ * needed.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
krb5_error_code smb_krb5_unparse_name(TALLOC_CTX *mem_ctx,
krb5_context context,
krb5_const_principal principal,
return 0;
}
-krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
- const char *name,
- krb5_principal *principal)
-{
- /* we are cheating here because parse_name will in fact set the realm.
- * We don't care as the only caller of smb_krb5_parse_name_norealm
- * ignores the realm anyway when calling
- * smb_krb5_principal_compare_any_realm later - Guenther */
-
- return smb_krb5_parse_name(context, name, principal);
-}
-
-bool smb_krb5_principal_compare_any_realm(krb5_context context,
- krb5_const_principal princ1,
- krb5_const_principal princ2)
-{
- return krb5_principal_compare_any_realm(context, princ1, princ2);
-}
-
/**
* @brief Free the contents of a krb5_data structure and zero the data field.
*
ZERO_STRUCT(creds);
ZERO_STRUCT(creds_in);
- initialize_krb5_error_table();
- ret = krb5_init_context(&context);
+ ret = smb_krb5_init_context_common(&context);
if (ret) {
+ DBG_ERR("kerberos init context failed (%s)\n",
+ error_message(ret));
goto done;
}
addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
if (addrs->val == NULL) {
SAFE_FREE(addrs);
- SAFE_FREE(kerb_addr);
+ SAFE_FREE(*kerb_addr);
return ENOMEM;
}
/**
* @brief Open a key table readonly or with readwrite access.
*
- * Allows to use a different keytab than the default one using a relative
+ * Allows one to use a different keytab than the default one using a relative
* path to the keytab.
*
* @param[in] context The library context
goto out;
}
- if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
- (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
+ if ((strncmp(keytab_name_req, "WRFILE:", 7) == 0) ||
+ (strncmp(keytab_name_req, "FILE:", 5) == 0)) {
tmp = keytab_name_req;
goto resolve;
}
/**
* @brief Open a key table readonly or with readwrite access.
*
- * Allows to use a different keytab than the default one. The path needs to be
+ * Allows one to use a different keytab than the default one. The path needs to be
* an absolute path or an error will be returned.
*
* @param[in] context The library context
bool write_access,
krb5_keytab *keytab)
{
- if (keytab_name_req != NULL) {
- if (keytab_name_req[0] != '/') {
- return KRB5_KT_BADNAME;
- }
+ int cmp;
+
+ if (keytab_name_req == NULL) {
+ return KRB5_KT_BADNAME;
+ }
+
+ if (keytab_name_req[0] == '/') {
+ goto open_keytab;
+ }
+
+ cmp = strncmp(keytab_name_req, "FILE:/", 6);
+ if (cmp == 0) {
+ goto open_keytab;
+ }
+
+ cmp = strncmp(keytab_name_req, "WRFILE:/", 8);
+ if (cmp == 0) {
+ goto open_keytab;
}
+ DBG_WARNING("ERROR: Invalid keytab name: %s\n", keytab_name_req);
+
+ return KRB5_KT_BADNAME;
+
+open_keytab:
return smb_krb5_kt_open_relative(context,
keytab_name_req,
write_access,
*
* @param[in] princ The principal as a krb5_principal to search for.
*
- * @param[in] flush Weather to flush the complete keytab.
+ * @param[in] flush Whether to flush the complete keytab.
*
* @param[in] keep_old_entries Keep the entry with the previous kvno.
*
{
krb5_error_code ret;
krb5_kt_cursor cursor;
- krb5_kt_cursor zero_csr;
krb5_keytab_entry kt_entry;
- krb5_keytab_entry zero_kt_entry;
char *ktprinc = NULL;
krb5_kvno old_kvno = kvno - 1;
TALLOC_CTX *tmp_ctx;
ZERO_STRUCT(cursor);
- ZERO_STRUCT(zero_csr);
ZERO_STRUCT(kt_entry);
- ZERO_STRUCT(zero_kt_entry);
ret = krb5_kt_start_seq_get(context, keytab, &cursor);
if (ret == KRB5_KT_END || ret == ENOENT ) {
}
if (!flush &&
- (kt_entry.vno == kvno) &&
+ ((kt_entry.vno & 0xff) == (kvno & 0xff)) &&
(kt_entry_enctype != enctype))
{
DEBUG(5, (__location__ ": Saving entry with kvno [%d] "
out:
talloc_free(tmp_ctx);
- if (memcmp(&zero_kt_entry, &kt_entry, sizeof(krb5_keytab_entry))) {
+ if (!all_zero((uint8_t *)&kt_entry, sizeof(kt_entry))) {
smb_krb5_kt_free_entry(context, &kt_entry);
}
- if (memcmp(&cursor, &zero_csr, sizeof(krb5_kt_cursor)) != 0) {
+ if (!all_zero((uint8_t *)&cursor, sizeof(cursor))) {
krb5_kt_end_seq_get(context, keytab, &cursor);
}
return ret;
* this is only set to false for encryption types
* which do not support salting like RC4.
*
- * @param[in] keep_old_entries Wether to keep or delte old keytab entries.
+ * @param[in] keep_old_entries Whether to keep or delete old keytab entries.
*
* @retval 0 on Success
*
{
#if defined(HAVE_KRB5_KEYBLOCK_INIT)
return krb5_keyblock_init(context, enctype, data, length, key);
-#elif defined(HAVE_KRB5_INIT_KEYBLOCK)
- krb5_error_code code;
-
- code = krb5_init_keyblock(context,
- enctype,
- length,
- key);
- if (code != 0) {
- return code;
- }
-
- if (length != 0) {
- memcpy(KRB5_KEY_DATA(key), data, length);
- }
-
- return 0;
#else
memset(key, 0, sizeof(krb5_keyblock));
KRB5_KEY_DATA(key) = SMB_MALLOC(length);
#endif
}
-/*
- simulate a kinit, putting the tgt in the given credentials cache.
- Orignally by remus@snapserver.com
-
- This version is built to use a keyblock, rather than needing the
- original password.
-
- The impersonate_principal is the principal if NULL, or the principal
- to impersonate
-
- The target_service defaults to the krbtgt if NULL, but could be
- kpasswd/realm or the local service (if we are doing s4u2self)
-*/
-krb5_error_code kerberos_kinit_keyblock_cc(krb5_context ctx, krb5_ccache cc,
- krb5_principal principal,
- krb5_keyblock *keyblock,
- const char *target_service,
- krb5_get_init_creds_opt *krb_options,
- time_t *expire_time,
- time_t *kdc_time)
+/**
+ * @brief Simulate a kinit by putting the tgt in the given credential cache.
+ *
+ * This function uses a keyblock rather than needing the original password.
+ *
+ * @param[in] ctx The library context
+ *
+ * @param[in] cc The credential cache to put the tgt in.
+ *
+ * @param[in] principal The client princial
+ *
+ * @param[in] keyblock The keyblock to use.
+ *
+ * @param[in] target_service The service name of the initial credentials (or NULL).
+ *
+ * @param[in] krb_options Initial credential options.
+ *
+ * @param[in] expire_time A pointer to store the experation time of the
+ * credentials (or NULL).
+ *
+ * @param[in] kdc_time A pointer to store the time when the ticket becomes
+ * valid (or NULL).
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kinit_keyblock_ccache(krb5_context ctx,
+ krb5_ccache cc,
+ krb5_principal principal,
+ krb5_keyblock *keyblock,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time)
{
krb5_error_code code = 0;
krb5_creds my_creds;
return code;
}
-krb5_error_code kerberos_kinit_password_cc(krb5_context ctx, krb5_ccache cc,
- krb5_principal principal,
- const char *password,
- const char *target_service,
- krb5_get_init_creds_opt *krb_options,
- time_t *expire_time,
- time_t *kdc_time)
+/**
+ * @brief Simulate a kinit by putting the tgt in the given credential cache.
+ *
+ * @param[in] ctx The library context
+ *
+ * @param[in] cc The credential cache to put the tgt in.
+ *
+ * @param[in] principal The client princial
+ *
+ * @param[in] password The password (or NULL).
+ *
+ * @param[in] target_service The service name of the initial credentials (or NULL).
+ *
+ * @param[in] krb_options Initial credential options.
+ *
+ * @param[in] expire_time A pointer to store the experation time of the
+ * credentials (or NULL).
+ *
+ * @param[in] kdc_time A pointer to store the time when the ticket becomes
+ * valid (or NULL).
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kinit_password_ccache(krb5_context ctx,
+ krb5_ccache cc,
+ krb5_principal principal,
+ const char *password,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time)
{
krb5_error_code code = 0;
krb5_creds my_creds;
}
#ifdef SAMBA4_USES_HEIMDAL
-/*
- simulate a kinit, putting the tgt in the given credentials cache.
- Orignally by remus@snapserver.com
-
- The impersonate_principal is the principal
-
- The self_service, should be the local service (for S4U2Self if
- impersonate_principal is given).
-
- The target_service defaults to the krbtgt if NULL, but could be
- kpasswd/realm or a remote service (for S4U2Proxy)
-
-*/
-krb5_error_code kerberos_kinit_s4u2_cc(krb5_context ctx,
- krb5_ccache store_cc,
- krb5_principal init_principal,
- const char *init_password,
- krb5_principal impersonate_principal,
- const char *self_service,
- const char *target_service,
- krb5_get_init_creds_opt *krb_options,
- time_t *expire_time,
- time_t *kdc_time)
+/**
+ * @brief Simulate a kinit by putting the tgt in the given credential cache.
+ *
+ * @param[in] ctx The library context
+ *
+ * @param[in] cc The credential cache to store the tgt in.
+ *
+ * @param[in] principal The initial client princial.
+ *
+ * @param[in] password The password (or NULL).
+ *
+ * @param[in] impersonate_principal The impersonatiion principal (or NULL).
+ *
+ * @param[in] self_service The local service for S4U2Self if
+ * impersonate_principal is specified).
+ *
+ * @param[in] target_service The service name of the initial credentials
+ * (kpasswd/REALM or a remote service). It defaults
+ * to the krbtgt if NULL.
+ *
+ * @param[in] krb_options Initial credential options.
+ *
+ * @param[in] expire_time A pointer to store the experation time of the
+ * credentials (or NULL).
+ *
+ * @param[in] kdc_time A pointer to store the time when the ticket becomes
+ * valid (or NULL).
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kinit_s4u2_ccache(krb5_context ctx,
+ krb5_ccache store_cc,
+ krb5_principal init_principal,
+ const char *init_password,
+ krb5_principal impersonate_principal,
+ const char *self_service,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time)
{
krb5_error_code code = 0;
krb5_get_creds_opt options;
krb5_principal target_princ;
krb5_ccache tmp_cc;
const char *self_realm;
+ const char *client_realm = NULL;
krb5_principal blacklist_principal = NULL;
krb5_principal whitelist_principal = NULL;
if (code != 0) {
ip = NULL;
}
- DEBUG(1, ("kerberos_kinit_password_cc: "
+ DEBUG(1, ("smb_krb5_kinit_password_cache: "
"KDC returned self principal[%s] while impersonating [%s]\n",
sp?sp:"<no memory>",
ip?ip:"<no memory>"));
if (code != 0) {
ep = NULL;
}
- DEBUG(1, ("kerberos_kinit_password_cc: "
+ DEBUG(1, ("smb_krb5_kinit_password_cache: "
"KDC returned wrong principal[%s] we expected [%s]\n",
sp?sp:"<no memory>",
ep?ep:"<no memory>"));
return code;
}
+ client_realm = krb5_principal_get_realm(ctx, store_creds.client);
+ if (client_realm != NULL) {
+ /*
+ * Because the CANON flag doesn't have any impact
+ * on the impersonate_principal => store_creds.client
+ * realm mapping. We need to store the credentials twice,
+ * once with the returned realm and once with the
+ * realm of impersonate_principal.
+ */
+ code = krb5_principal_set_realm(ctx, store_creds.server,
+ client_realm);
+ if (code != 0) {
+ krb5_free_cred_contents(ctx, &store_creds);
+ return code;
+ }
+
+ code = krb5_cc_store_cred(ctx, store_cc, &store_creds);
+ if (code != 0) {
+ krb5_free_cred_contents(ctx, &store_creds);
+ return code;
+ }
+ }
+
if (expire_time) {
*expire_time = (time_t) store_creds.times.endtime;
}
#endif
#if !defined(HAVE_KRB5_MAKE_PRINCIPAL) && defined(HAVE_KRB5_BUILD_PRINCIPAL_ALLOC_VA)
+/**
+ * @brief Create a principal name using a variable argument list.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[inout] principal A pointer to the principal structure.
+ *
+ * @param[in] _realm The realm to use. If NULL then the function will
+ * get the default realm name.
+ *
+ * @param[in] ... A list of 'char *' components, ending with NULL.
+ *
+ * Use krb5_free_principal() to free the principal when it is no longer needed.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
krb5_error_code smb_krb5_make_principal(krb5_context context,
krb5_principal *principal,
const char *_realm, ...)
}
#endif
+/**
+ * @brief Compute a checksum operating on a keyblock.
+ *
+ * This function computes a checksum over a PAC using the keyblock for a keyed
+ * checksum.
+ *
+ * @param[in] mem_ctx A talloc context to alocate the signature on.
+ *
+ * @param[in] pac_data The PAC as input.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] keyblock Encryption key for a keyed checksum.
+ *
+ * @param[out] sig_type The checksum type
+ *
+ * @param[out] sig_blob The talloc'ed checksum
+ *
+ * The caller must free the sig_blob with talloc_free() when it is not needed
+ * anymore.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
krb5_error_code smb_krb5_make_pac_checksum(TALLOC_CTX *mem_ctx,
DATA_BLOB *pac_data,
krb5_context context,
}
-/*
- * smb_krb5_principal_get_realm
- *
+/**
* @brief Get realm of a principal
*
- * @param[in] context The krb5_context
- * @param[in] principal The principal
- * @return pointer to the realm
+ * @param[in] mem_ctx The talloc ctx to put the result on
*
- * Caller must free if the return value is not NULL.
+ * @param[in] context The library context
*
+ * @param[in] principal The principal to get the realm from.
+ *
+ * @return A talloced string with the realm or NULL if an error occurred.
*/
-
-char *smb_krb5_principal_get_realm(krb5_context context,
+char *smb_krb5_principal_get_realm(TALLOC_CTX *mem_ctx,
+ krb5_context context,
krb5_const_principal principal)
{
#ifdef HAVE_KRB5_PRINCIPAL_GET_REALM /* Heimdal */
- return strdup(discard_const_p(char, krb5_principal_get_realm(context, principal)));
+ return talloc_strdup(mem_ctx,
+ krb5_principal_get_realm(context, principal));
#elif defined(krb5_princ_realm) /* MIT */
- krb5_data *realm;
- realm = discard_const_p(krb5_data,
- krb5_princ_realm(context, principal));
- return strndup(realm->data, realm->length);
+ const krb5_data *realm;
+ realm = krb5_princ_realm(context, principal);
+ return talloc_strndup(mem_ctx, realm->data, realm->length);
#else
#error UNKNOWN_GET_PRINC_REALM_FUNCTIONS
#endif
}
-/*
- * smb_krb5_principal_set_realm
- *
+/**
* @brief Get realm of a principal
*
- * @param[in] context The krb5_context
- * @param[in] principal The principal
- * @param[in] realm The realm
- * @return 0 on success, a krb5_error_code on error.
+ * @param[in] context The library context
+ *
+ * @param[in] principal The principal to set the realm
+ *
+ * @param[in] realm The realm as a string to set.
*
+ * @retur 0 on success, a Kerberos error code otherwise.
*/
-
krb5_error_code smb_krb5_principal_set_realm(krb5_context context,
krb5_principal principal,
const char *realm)
}
-/************************************************************************
- Routine to get the default realm from the kerberos credentials cache.
- Caller must free if the return value is not NULL.
-************************************************************************/
-
-static char *smb_krb5_get_default_realm_from_ccache(TALLOC_CTX *mem_ctx)
-{
- char *realm = NULL;
- krb5_context ctx = NULL;
- krb5_ccache cc = NULL;
- krb5_principal princ = NULL;
-
- initialize_krb5_error_table();
- if (krb5_init_context(&ctx)) {
- return NULL;
- }
-
- DEBUG(5,("kerberos_get_default_realm_from_ccache: "
- "Trying to read krb5 cache: %s\n",
- krb5_cc_default_name(ctx)));
- if (krb5_cc_default(ctx, &cc)) {
- DEBUG(5,("kerberos_get_default_realm_from_ccache: "
- "failed to read default cache\n"));
- goto out;
- }
- if (krb5_cc_get_principal(ctx, cc, &princ)) {
- DEBUG(5,("kerberos_get_default_realm_from_ccache: "
- "failed to get default principal\n"));
- goto out;
- }
-
-#if defined(HAVE_KRB5_PRINCIPAL_GET_REALM)
- realm = talloc_strdup(mem_ctx, krb5_principal_get_realm(ctx, princ));
-#elif defined(HAVE_KRB5_PRINC_REALM)
- {
- krb5_data *realm_data = krb5_princ_realm(ctx, princ);
- realm = talloc_strndup(mem_ctx, realm_data->data, realm_data->length);
- }
-#endif
-
- out:
-
- if (ctx) {
- if (princ) {
- krb5_free_principal(ctx, princ);
- }
- if (cc) {
- krb5_cc_close(ctx, cc);
- }
- krb5_free_context(ctx);
- }
-
- return realm;
-}
-
-/************************************************************************
- Routine to get the realm from a given DNS name.
-************************************************************************/
-
-static char *smb_krb5_get_realm_from_hostname(TALLOC_CTX *mem_ctx,
- const char *hostname)
+/**
+ * @brief Get the realm from the service hostname.
+ *
+ * This function will look for a domain realm mapping in the [domain_realm]
+ * section of the krb5.conf first and fallback to extract the realm from
+ * the provided service hostname. As a last resort it will return the
+ * provided client_realm.
+ *
+ * @param[in] mem_ctx The talloc context
+ *
+ * @param[in] hostname The service hostname
+ *
+ * @param[in] client_realm If we can not find a mapping, fall back to
+ * this realm.
+ *
+ * @return The realm to use for the service hostname, NULL if a fatal error
+ * occured.
+ */
+char *smb_krb5_get_realm_from_hostname(TALLOC_CTX *mem_ctx,
+ const char *hostname,
+ const char *client_realm)
{
#if defined(HAVE_KRB5_REALM_TYPE)
/* Heimdal. */
krb5_error_code kerr;
krb5_context ctx = NULL;
- initialize_krb5_error_table();
- if (krb5_init_context(&ctx)) {
+ kerr = smb_krb5_init_context_common(&ctx);
+ if (kerr) {
+ DBG_ERR("kerberos init context failed (%s)\n",
+ error_message(kerr));
return NULL;
}
kerr = krb5_get_host_realm(ctx, hostname, &realm_list);
+ if (kerr == KRB5_ERR_HOST_REALM_UNKNOWN) {
+ realm_list = NULL;
+ kerr = 0;
+ }
if (kerr != 0) {
DEBUG(3,("kerberos_get_realm_from_hostname %s: "
"failed %s\n",
goto out;
}
- if (realm_list && realm_list[0]) {
+ if (realm_list != NULL &&
+ realm_list[0] != NULL &&
+ realm_list[0][0] != '\0') {
realm = talloc_strdup(mem_ctx, realm_list[0]);
+ if (realm == NULL) {
+ goto out;
+ }
+ } else {
+ const char *p = NULL;
+
+ /*
+ * "dc6.samba2003.example.com"
+ * returns a realm of "SAMBA2003.EXAMPLE.COM"
+ *
+ * "dc6." returns realm as NULL
+ */
+ p = strchr_m(hostname, '.');
+ if (p != NULL && p[1] != '\0') {
+ realm = talloc_strdup_upper(mem_ctx, p + 1);
+ if (realm == NULL) {
+ goto out;
+ }
+ }
+ }
+
+ if (realm == NULL) {
+ realm = talloc_strdup(mem_ctx, client_realm);
}
out:
return realm;
}
-char *kerberos_get_principal_from_service_hostname(TALLOC_CTX *mem_ctx,
- const char *service,
- const char *remote_name,
- const char *default_realm)
-{
- char *realm = NULL;
- char *host = NULL;
- char *principal;
- host = strchr_m(remote_name, '.');
- if (host) {
- /* DNS name. */
- realm = smb_krb5_get_realm_from_hostname(talloc_tos(),
- remote_name);
- } else {
- /* NetBIOS name - use our realm. */
- realm = smb_krb5_get_default_realm_from_ccache(talloc_tos());
- }
-
- if (realm == NULL || *realm == '\0') {
- realm = talloc_strdup(talloc_tos(), default_realm);
- if (!realm) {
- return NULL;
- }
- DEBUG(3,("kerberos_get_principal_from_service_hostname: "
- "cannot get realm from, "
- "desthost %s or default ccache. Using default "
- "smb.conf realm %s\n",
- remote_name,
- realm));
- }
-
- principal = talloc_asprintf(mem_ctx,
- "%s/%s@%s",
- service, remote_name,
- realm);
- TALLOC_FREE(realm);
- return principal;
-}
-
+/**
+ * @brief Get an error string from a Kerberos error code.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] code The Kerberos error code.
+ *
+ * @param[in] mem_ctx The talloc context to allocate the error string on.
+ *
+ * @return A talloc'ed error string or NULL if an error occurred.
+ *
+ * The caller must free the returned error string with talloc_free() if not
+ * needed anymore
+ */
char *smb_get_krb5_error_message(krb5_context context,
krb5_error_code code,
TALLOC_CTX *mem_ctx)
/**
-* @brief Return the kerberos library setting for "libdefaults:allow_weak_crypto"
-*
-* @param context The krb5_context
-*
-* @return krb5_boolean
-*
-* Function returns true if weak crypto is allowd, false if not
-*/
-
+ * @brief Return the kerberos library setting for: libdefaults:allow_weak_crypto
+ *
+ * @param[in] context The library context
+ *
+ * @return True if weak crypto is allowed, false if not.
+ */
krb5_boolean smb_krb5_get_allowed_weak_crypto(krb5_context context)
#if defined(HAVE_KRB5_CONFIG_GET_BOOL_DEFAULT)
{
#endif
/**
-* @brief Return the type of a krb5_principal
-*
-* @param context The krb5_context
-* @param principal The const krb5_principal
-*
-* @return integer type of the principal
-*/
+ * @brief Return the type of a krb5_principal
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] principal The principal to get the type from.
+ *
+ * @return The integer type of the principal.
+ */
int smb_krb5_principal_get_type(krb5_context context,
krb5_const_principal principal)
{
}
/**
-* @brief Set the type of a krb5_principal
-*
-* @param context The krb5_context
-* @param principal The const krb5_principal
-* @param type The principal type
-*
-*/
+ * @brief Set the type of a principal
+ *
+ * @param[in] context The library context
+ *
+ * @param[inout] principal The principal to set the type for.
+ *
+ * @param[in] type The principal type to set.
+ */
void smb_krb5_principal_set_type(krb5_context context,
krb5_principal principal,
int type)
#endif
}
-/**
-* @brief Generate a krb5 warning, forwarding to com_err
-*
-* @param context The krb5_context
-* @param fmt The message format
-* @param ... The message arguments
-*
-* @return
-*/
#if !defined(HAVE_KRB5_WARNX)
+/**
+ * @brief Log a Kerberos message
+ *
+ * It sends the message to com_err.
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] fmt The message format
+ *
+ * @param[in] ... The message arguments
+ *
+ * @return 0 on success.
+ */
krb5_error_code krb5_warnx(krb5_context context, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
- com_err_va("kdb_samba", errno, fmt, args);
+ com_err_va("samba-kdc", errno, fmt, args);
va_end(args);
return 0;
}
#endif
+/**
+ * @brief Copy a credential cache.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] incc Credential cache to be copied.
+ *
+ * @param[inout] outcc Copy of credential cache to be filled in.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
krb5_error_code smb_krb5_cc_copy_creds(krb5_context context,
krb5_ccache incc, krb5_ccache outcc)
{
#ifdef HAVE_KRB5_CC_COPY_CACHE /* Heimdal */
return krb5_cc_copy_cache(context, incc, outcc);
#elif defined(HAVE_KRB5_CC_COPY_CREDS)
+ krb5_error_code ret;
+ krb5_principal princ = NULL;
+
+ ret = krb5_cc_get_principal(context, incc, &princ);
+ if (ret != 0) {
+ return ret;
+ }
+ ret = krb5_cc_initialize(context, outcc, princ);
+ krb5_free_principal(context, princ);
+ if (ret != 0) {
+ return ret;
+ }
return krb5_cc_copy_creds(context, incc, outcc);
#else
#error UNKNOWN_KRB5_CC_COPY_CACHE_OR_CREDS_FUNCTION
if (retval != 0) {
DBG_WARNING("krb5_auth_con_setuseruserkey "
"failed (%s)\n",
- error_message(retval)));
+ error_message(retval));
goto cleanup_creds;
}
KRB5_AUTH_CONTEXT_USE_SUBKEY);
if (retval != 0) {
DBG_WARNING("krb5_auth_con_setflags failed (%s)\n",
- error_message(retval)));
+ error_message(retval));
goto cleanup_creds;
}
retval = ads_setup_auth_context(context, auth_context);
if (retval != 0) {
DBG_WARNING("ads_setup_auth_context failed (%s)\n",
- error_message(retval)));
+ error_message(retval));
goto cleanup_creds;
}
} else {
ENCTYPE_NULL};
bool ok;
- initialize_krb5_error_table();
- retval = krb5_init_context(&context);
+ retval = smb_krb5_init_context_common(&context);
if (retval != 0) {
- DBG_WARNING("krb5_init_context failed (%s)\n",
- error_message(retval));
+ DBG_ERR("kerberos init context failed (%s)\n",
+ error_message(retval));
goto failed;
}
return retval;
}
+#ifndef SAMBA4_USES_HEIMDAL /* MITKRB5 tracing callback */
+static void smb_krb5_trace_cb(krb5_context ctx,
+ const krb5_trace_info *info,
+ void *data)
+{
+ if (info != NULL) {
+ DBGC_DEBUG(DBGC_KERBEROS, "%s", info->message);
+ }
+}
+#endif
+
+krb5_error_code smb_krb5_init_context_common(krb5_context *_krb5_context)
+{
+ krb5_error_code ret;
+ krb5_context krb5_ctx;
+
+ initialize_krb5_error_table();
+
+ ret = krb5_init_context(&krb5_ctx);
+ if (ret) {
+ DBG_ERR("Krb5 context initialization failed (%s)\n",
+ error_message(ret));
+ return ret;
+ }
+
+ /* The MIT Kerberos build relies on using the system krb5.conf file.
+ * If you really want to use another file please set KRB5_CONFIG
+ * accordingly. */
+#ifndef SAMBA4_USES_HEIMDAL
+ ret = krb5_set_trace_callback(krb5_ctx, smb_krb5_trace_cb, NULL);
+ if (ret) {
+ DBG_ERR("Failed to set MIT kerberos trace callback! (%s)\n",
+ error_message(ret));
+ }
+#endif
+ *_krb5_context = krb5_ctx;
+ return 0;
+}
+
#else /* HAVE_KRB5 */
/* This saves a few linking headaches */
int ads_krb5_cli_get_ticket(TALLOC_CTX *mem_ctx,
git.samba.org / samba.git / blobdiff