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Diffstat (limited to 'source3/lib/smbldap.c')
| -rw-r--r-- | source3/lib/smbldap.c | 1941 |
1 files changed, 1941 insertions, 0 deletions
diff --git a/source3/lib/smbldap.c b/source3/lib/smbldap.c new file mode 100644 index 0000000..c0d6884 --- /dev/null +++ b/source3/lib/smbldap.c @@ -0,0 +1,1941 @@ +/* + Unix SMB/CIFS implementation. + LDAP protocol helper functions for SAMBA + Copyright (C) Jean François Micouleau 1998 + Copyright (C) Gerald Carter 2001-2003 + Copyright (C) Shahms King 2001 + Copyright (C) Andrew Bartlett 2002-2003 + Copyright (C) Stefan (metze) Metzmacher 2002-2003 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + +*/ + +#include "includes.h" +#include "smbldap.h" +#include "../libcli/security/security.h" +#include <tevent.h> +#include "lib/param/loadparm.h" + +/* Try not to hit the up or down server forever */ + +#define SMBLDAP_DONT_PING_TIME 10 /* ping only all 10 seconds */ +#define SMBLDAP_NUM_RETRIES 8 /* retry only 8 times */ + +#define SMBLDAP_IDLE_TIME 150 /* After 2.5 minutes disconnect */ + +struct smbldap_state { + LDAP *ldap_struct; + pid_t pid; + time_t last_ping; /* monotonic */ + /* retrieve-once info */ + const char *uri; + + /* credentials */ + bool anonymous; + char *bind_dn; + char *bind_secret; + smbldap_bind_callback_fn bind_callback; + void *bind_callback_data; + + bool paged_results; + + unsigned int num_failures; + + time_t last_use; /* monotonic */ + struct tevent_context *tevent_context; + struct tevent_timer *idle_event; + + struct timeval last_rebind; /* monotonic */ +}; + +LDAP *smbldap_get_ldap(struct smbldap_state *state) +{ + return state->ldap_struct; +} + +bool smbldap_get_paged_results(struct smbldap_state *state) +{ + return state->paged_results; +} + +void smbldap_set_paged_results(struct smbldap_state *state, + bool paged_results) +{ + state->paged_results = paged_results; +} + +void smbldap_set_bind_callback(struct smbldap_state *state, + smbldap_bind_callback_fn callback, + void *callback_data) +{ + state->bind_callback = callback; + state->bind_callback_data = callback_data; +} +/******************************************************************* + Search an attribute and return the first value found. +******************************************************************/ + + bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry, + const char *attribute, char *value, + int max_len) +{ + char **values; + size_t size = 0; + + if ( !attribute ) + return False; + + value[0] = '\0'; + + if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) { + DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute)); + + return False; + } + + if (!convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, &size)) { + DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n", + attribute, values[0])); + ldap_value_free(values); + return False; + } + + ldap_value_free(values); +#ifdef DEBUG_PASSWORDS + DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value)); +#endif + return True; +} + + char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry, + const char *attribute, + TALLOC_CTX *mem_ctx) +{ + char **values; + char *result; + size_t converted_size; + + if (attribute == NULL) { + return NULL; + } + + values = ldap_get_values(ldap_struct, entry, attribute); + + if (values == NULL) { + DEBUG(10, ("attribute %s does not exist\n", attribute)); + return NULL; + } + + if (ldap_count_values(values) != 1) { + DEBUG(10, ("attribute %s has %d values, expected only one\n", + attribute, ldap_count_values(values))); + ldap_value_free(values); + return NULL; + } + + if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) { + DEBUG(10, ("pull_utf8_talloc failed\n")); + ldap_value_free(values); + return NULL; + } + + ldap_value_free(values); + +#ifdef DEBUG_PASSWORDS + DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", + attribute, result)); +#endif + return result; +} + + char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry, + const char *attribute, + TALLOC_CTX *mem_ctx) +{ + char **values; + char *result; + size_t converted_size; + + if (attribute == NULL) { + return NULL; + } + + values = ldap_get_values(ldap_struct, entry, attribute); + + if (values == NULL) { + DEBUG(10, ("attribute %s does not exist\n", attribute)); + return NULL; + } + + if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) { + DEBUG(10, ("pull_utf8_talloc failed\n")); + ldap_value_free(values); + return NULL; + } + + ldap_value_free(values); + +#ifdef DEBUG_PASSWORDS + DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n", + attribute, result)); +#endif + return result; +} + + char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry, + const char *attribute, + TALLOC_CTX *mem_ctx) +{ + char **values; + char *result; + size_t converted_size; + int i, num_values; + + if (attribute == NULL) { + return NULL; + } + + values = ldap_get_values(ldap_struct, entry, attribute); + + if (values == NULL) { + DEBUG(10, ("attribute %s does not exist\n", attribute)); + return NULL; + } + + if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) { + DEBUG(10, ("pull_utf8_talloc failed\n")); + ldap_value_free(values); + return NULL; + } + + num_values = ldap_count_values(values); + + for (i=1; i<num_values; i++) { + char *tmp; + + if (!pull_utf8_talloc(mem_ctx, &tmp, values[i], + &converted_size)) { + DEBUG(10, ("pull_utf8_talloc failed\n")); + TALLOC_FREE(result); + ldap_value_free(values); + return NULL; + } + + if (strcasecmp_m(tmp, result) < 0) { + TALLOC_FREE(result); + result = tmp; + } else { + TALLOC_FREE(tmp); + } + } + + ldap_value_free(values); + +#ifdef DEBUG_PASSWORDS + DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", + attribute, result)); +#endif + return result; +} + + bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld, + LDAPMessage *msg, const char *attrib, + DATA_BLOB *blob) +{ + struct berval **values; + + values = ldap_get_values_len(ld, msg, attrib); + if (!values) { + return false; + } + + if (ldap_count_values_len(values) != 1) { + DEBUG(10, ("Expected one value for %s, got %d\n", attrib, + ldap_count_values_len(values))); + return false; + } + + *blob = data_blob_talloc(mem_ctx, values[0]->bv_val, + values[0]->bv_len); + ldap_value_free_len(values); + + return (blob->data != NULL); +} + + bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib, + struct dom_sid *sid) +{ + DATA_BLOB blob; + ssize_t ret; + + if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib, + &blob)) { + return false; + } + ret = sid_parse(blob.data, blob.length, sid); + TALLOC_FREE(blob.data); + return (ret != -1); +} + + static int ldapmsg_destructor(LDAPMessage **result) { + ldap_msgfree(*result); + return 0; +} + + void smbldap_talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result) +{ + LDAPMessage **handle; + + if (result == NULL) { + return; + } + + handle = talloc(mem_ctx, LDAPMessage *); + SMB_ASSERT(handle != NULL); + + *handle = result; + talloc_set_destructor(handle, ldapmsg_destructor); +} + + static int ldapmod_destructor(LDAPMod ***mod) { + ldap_mods_free(*mod, True); + return 0; +} + + void smbldap_talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod) +{ + LDAPMod ***handle; + + if (mod == NULL) { + return; + } + + handle = talloc(mem_ctx, LDAPMod **); + SMB_ASSERT(handle != NULL); + + *handle = mod; + talloc_set_destructor(handle, ldapmod_destructor); +} + +/************************************************************************ + Routine to manage the LDAPMod structure array + manage memory used by the array, by each struct, and values + ***********************************************************************/ + +static void smbldap_set_mod_internal(LDAPMod *** modlist, int modop, const char *attribute, const char *value, const DATA_BLOB *blob) +{ + LDAPMod **mods; + int i; + int j; + + mods = *modlist; + + /* sanity checks on the mod values */ + + if (attribute == NULL || *attribute == '\0') { + return; + } + +#if 0 /* commented out after discussion with abartlet. Do not re-enable. + left here so other do not re-add similar code --jerry */ + if (value == NULL || *value == '\0') + return; +#endif + + if (mods == NULL) { + mods = SMB_MALLOC_P(LDAPMod *); + if (mods == NULL) { + smb_panic("smbldap_set_mod: out of memory!"); + /* notreached. */ + } + mods[0] = NULL; + } + + for (i = 0; mods[i] != NULL; ++i) { + if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute)) + break; + } + + if (mods[i] == NULL) { + mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2); + if (mods == NULL) { + smb_panic("smbldap_set_mod: out of memory!"); + /* notreached. */ + } + mods[i] = SMB_MALLOC_P(LDAPMod); + if (mods[i] == NULL) { + smb_panic("smbldap_set_mod: out of memory!"); + /* notreached. */ + } + mods[i]->mod_op = modop; + mods[i]->mod_values = NULL; + mods[i]->mod_type = SMB_STRDUP(attribute); + mods[i + 1] = NULL; + } + + if (blob && (modop & LDAP_MOD_BVALUES)) { + j = 0; + if (mods[i]->mod_bvalues != NULL) { + for (; mods[i]->mod_bvalues[j] != NULL; j++); + } + mods[i]->mod_bvalues = SMB_REALLOC_ARRAY(mods[i]->mod_bvalues, struct berval *, j + 2); + + if (mods[i]->mod_bvalues == NULL) { + smb_panic("smbldap_set_mod: out of memory!"); + /* notreached. */ + } + + mods[i]->mod_bvalues[j] = SMB_MALLOC_P(struct berval); + SMB_ASSERT(mods[i]->mod_bvalues[j] != NULL); + + mods[i]->mod_bvalues[j]->bv_val = (char *)smb_memdup(blob->data, blob->length); + SMB_ASSERT(mods[i]->mod_bvalues[j]->bv_val != NULL); + mods[i]->mod_bvalues[j]->bv_len = blob->length; + + mods[i]->mod_bvalues[j + 1] = NULL; + } else if (value != NULL) { + char *utf8_value = NULL; + size_t converted_size; + + j = 0; + if (mods[i]->mod_values != NULL) { + for (; mods[i]->mod_values[j] != NULL; j++); + } + mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2); + + if (mods[i]->mod_values == NULL) { + smb_panic("smbldap_set_mod: out of memory!"); + /* notreached. */ + } + + if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) { + smb_panic("smbldap_set_mod: String conversion failure!"); + /* notreached. */ + } + + mods[i]->mod_values[j] = SMB_STRDUP(utf8_value); + TALLOC_FREE(utf8_value); + SMB_ASSERT(mods[i]->mod_values[j] != NULL); + + mods[i]->mod_values[j + 1] = NULL; + } + *modlist = mods; +} + + void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value) +{ + smbldap_set_mod_internal(modlist, modop, attribute, value, NULL); +} + + void smbldap_set_mod_blob(LDAPMod *** modlist, int modop, const char *attribute, const DATA_BLOB *value) +{ + smbldap_set_mod_internal(modlist, modop | LDAP_MOD_BVALUES, attribute, NULL, value); +} + +/********************************************************************** + Set attribute to newval in LDAP, regardless of what value the + attribute had in LDAP before. +*********************************************************************/ + +static void smbldap_make_mod_internal(LDAP *ldap_struct, LDAPMessage *existing, + LDAPMod ***mods, + const char *attribute, int op, + const char *newval, + const DATA_BLOB *newblob) +{ + char oldval[2048]; /* current largest allowed value is mungeddial */ + bool existed; + DATA_BLOB oldblob = data_blob_null; + + if (existing != NULL) { + if (op & LDAP_MOD_BVALUES) { + existed = smbldap_talloc_single_blob(talloc_tos(), ldap_struct, existing, attribute, &oldblob); + } else { + existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval)); + } + } else { + existed = False; + *oldval = '\0'; + } + + if (existed) { + bool equal = false; + if (op & LDAP_MOD_BVALUES) { + equal = (newblob && (data_blob_cmp(&oldblob, newblob) == 0)); + } else { + /* all of our string attributes are case insensitive */ + equal = (newval && (strcasecmp_m(oldval, newval) == 0)); + } + + if (equal) { + /* Believe it or not, but LDAP will deny a delete and + an add at the same time if the values are the + same... */ + DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute)); + return; + } + + /* There has been no value before, so don't delete it. + * Here's a possible race: We might end up with + * duplicate attributes */ + /* By deleting exactly the value we found in the entry this + * should be race-free in the sense that the LDAP-Server will + * deny the complete operation if somebody changed the + * attribute behind our back. */ + /* This will also allow modifying single valued attributes + * in Novell NDS. In NDS you have to first remove attribute and then + * you could add new value */ + + if (op & LDAP_MOD_BVALUES) { + DEBUG(10,("smbldap_make_mod: deleting attribute |%s| blob\n", attribute)); + smbldap_set_mod_blob(mods, LDAP_MOD_DELETE, attribute, &oldblob); + } else { + DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval)); + smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval); + } + } + + /* Regardless of the real operation (add or modify) + we add the new value here. We rely on deleting + the old value, should it exist. */ + + if (op & LDAP_MOD_BVALUES) { + if (newblob && newblob->length) { + DEBUG(10,("smbldap_make_mod: adding attribute |%s| blob\n", attribute)); + smbldap_set_mod_blob(mods, LDAP_MOD_ADD, attribute, newblob); + } + } else { + if ((newval != NULL) && (strlen(newval) > 0)) { + DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval)); + smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval); + } + } +} + + void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing, + LDAPMod ***mods, + const char *attribute, const char *newval) +{ + smbldap_make_mod_internal(ldap_struct, existing, mods, attribute, + 0, newval, NULL); +} + + void smbldap_make_mod_blob(LDAP *ldap_struct, LDAPMessage *existing, + LDAPMod ***mods, + const char *attribute, const DATA_BLOB *newblob) +{ + smbldap_make_mod_internal(ldap_struct, existing, mods, attribute, + LDAP_MOD_BVALUES, NULL, newblob); +} + +/********************************************************************** + Some variants of the LDAP rebind code do not pass in the third 'arg' + pointer to a void*, so we try and work around it by assuming that the + value of the 'LDAP *' pointer is the same as the one we had passed in + **********************************************************************/ + +struct smbldap_state_lookup { + LDAP *ld; + struct smbldap_state *smbldap_state; + struct smbldap_state_lookup *prev, *next; +}; + +static struct smbldap_state_lookup *smbldap_state_lookup_list; + +static struct smbldap_state *smbldap_find_state(LDAP *ld) +{ + struct smbldap_state_lookup *t; + + for (t = smbldap_state_lookup_list; t; t = t->next) { + if (t->ld == ld) { + return t->smbldap_state; + } + } + return NULL; +} + +static void smbldap_delete_state(struct smbldap_state *smbldap_state) +{ + struct smbldap_state_lookup *t; + + for (t = smbldap_state_lookup_list; t; t = t->next) { + if (t->smbldap_state == smbldap_state) { + DLIST_REMOVE(smbldap_state_lookup_list, t); + SAFE_FREE(t); + return; + } + } +} + +static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state) +{ + struct smbldap_state *tmp_ldap_state; + struct smbldap_state_lookup *t; + + if ((tmp_ldap_state = smbldap_find_state(ld))) { + SMB_ASSERT(tmp_ldap_state == smbldap_state); + return; + } + + t = SMB_XMALLOC_P(struct smbldap_state_lookup); + ZERO_STRUCTP(t); + + DLIST_ADD_END(smbldap_state_lookup_list, t); + t->ld = ld; + t->smbldap_state = smbldap_state; +} + +/******************************************************************** + start TLS on an existing LDAP connection per config +*******************************************************************/ + +int smbldap_start_tls(LDAP *ldap_struct, int version) +{ + if (lp_ldap_ssl() != LDAP_SSL_START_TLS) { + return LDAP_SUCCESS; + } + + return smbldap_start_tls_start(ldap_struct, version); +} + +/******************************************************************** + start TLS on an existing LDAP connection unconditionally +*******************************************************************/ + +int smbldap_start_tls_start(LDAP *ldap_struct, int version) +{ +#ifdef LDAP_OPT_X_TLS + int rc,tls; + + /* check if we use ldaps already */ + ldap_get_option(ldap_struct, LDAP_OPT_X_TLS, &tls); + if (tls == LDAP_OPT_X_TLS_HARD) { + return LDAP_SUCCESS; + } + + if (version != LDAP_VERSION3) { + DEBUG(0, ("Need LDAPv3 for Start TLS\n")); + return LDAP_OPERATIONS_ERROR; + } + + if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS) { + DEBUG(0,("Failed to issue the StartTLS instruction: %s\n", + ldap_err2string(rc))); + return rc; + } + + DEBUG (3, ("StartTLS issued: using a TLS connection\n")); + return LDAP_SUCCESS; +#else + DEBUG(0,("StartTLS not supported by LDAP client libraries!\n")); + return LDAP_OPERATIONS_ERROR; +#endif +} + +/******************************************************************** + setup a connection to the LDAP server based on a uri +*******************************************************************/ + +static int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri) +{ + int rc; + + DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri)); + +#ifdef HAVE_LDAP_INITIALIZE + + rc = ldap_initialize(ldap_struct, uri); + if (rc) { + DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc))); + return rc; + } + + if (lp_ldap_follow_referral() != Auto) { + rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS, + lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF); + if (rc != LDAP_SUCCESS) + DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n", + ldap_err2string(rc))); + } + +#else + + /* Parse the string manually */ + + { + int port = 0; + fstring protocol; + fstring host; + SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254); + + + /* skip leading "URL:" (if any) */ + if ( strnequal( uri, "URL:", 4 ) ) { + uri += 4; + } + + sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port); + + if (port == 0) { + if (strequal(protocol, "ldap")) { + port = LDAP_PORT; + } else if (strequal(protocol, "ldaps")) { + port = LDAPS_PORT; + } else { + DEBUG(0, ("unrecognised protocol (%s)!\n", protocol)); + } + } + + if ((*ldap_struct = ldap_init(host, port)) == NULL) { + DEBUG(0, ("ldap_init failed !\n")); + return LDAP_OPERATIONS_ERROR; + } + + if (strequal(protocol, "ldaps")) { +#ifdef LDAP_OPT_X_TLS + int tls = LDAP_OPT_X_TLS_HARD; + if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS) + { + DEBUG(0, ("Failed to setup a TLS session\n")); + } + + DEBUG(3,("LDAPS option set...!\n")); +#else + DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n")); + return LDAP_OPERATIONS_ERROR; +#endif /* LDAP_OPT_X_TLS */ + } + } + + /* now set connection timeout */ +#ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */ + { + int ct = lp_ldap_connection_timeout()*1000; + rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct); + if (rc != LDAP_SUCCESS) { + DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n", + ct, ldap_err2string(rc))); + } + } +#elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */ + { + struct timeval ct; + ct.tv_usec = 0; + ct.tv_sec = lp_ldap_connection_timeout(); + rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct); + if (rc != LDAP_SUCCESS) { + DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n", + (int)ct.tv_sec, ldap_err2string(rc))); + } + } +#endif + +#endif /* HAVE_LDAP_INITIALIZE */ + return LDAP_SUCCESS; +} + +/******************************************************************** + try to upgrade to Version 3 LDAP if not already, in either case return current + version + *******************************************************************/ + +static int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version) +{ + int version; + int rc; + + /* assume the worst */ + *new_version = LDAP_VERSION2; + + rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version); + if (rc) { + return rc; + } + + if (version == LDAP_VERSION3) { + *new_version = LDAP_VERSION3; + return LDAP_SUCCESS; + } + + /* try upgrade */ + version = LDAP_VERSION3; + rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version); + if (rc) { + return rc; + } + + *new_version = LDAP_VERSION3; + return LDAP_SUCCESS; +} + +/******************************************************************* + open a connection to the ldap server (just until the bind) + ******************************************************************/ + +int smbldap_setup_full_conn(LDAP **ldap_struct, const char *uri) +{ + int rc, version; + + rc = smb_ldap_setup_conn(ldap_struct, uri); + if (rc) { + return rc; + } + + rc = smb_ldap_upgrade_conn(*ldap_struct, &version); + if (rc) { + return rc; + } + + rc = smbldap_start_tls(*ldap_struct, version); + if (rc) { + return rc; + } + + return LDAP_SUCCESS; +} + +/******************************************************************* + open a connection to the ldap server. +******************************************************************/ +static int smbldap_open_connection (struct smbldap_state *ldap_state) + +{ + int rc = LDAP_SUCCESS; + int version; + int deref; + LDAP **ldap_struct = &ldap_state->ldap_struct; + + rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri); + if (rc) { + return rc; + } + + /* Store the LDAP pointer in a lookup list */ + + smbldap_store_state(*ldap_struct, ldap_state); + + /* Upgrade to LDAPv3 if possible */ + + rc = smb_ldap_upgrade_conn(*ldap_struct, &version); + if (rc) { + return rc; + } + + /* Start TLS if required */ + + rc = smbldap_start_tls(*ldap_struct, version); + if (rc) { + return rc; + } + + /* Set alias dereferencing method */ + deref = lp_ldap_deref(); + if (deref != -1) { + if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) { + DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref)); + } else { + DEBUG(5,("Set dereferencing method: %d\n", deref)); + } + } + + DEBUG(2, ("smbldap_open_connection: connection opened\n")); + return rc; +} + +/******************************************************************* + a rebind function for authenticated referrals + This version takes a void* that we can shove useful stuff in :-) +******************************************************************/ +#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000) +#else +static int rebindproc_with_state (LDAP * ld, char **whop, char **credp, + int *methodp, int freeit, void *arg) +{ + struct smbldap_state *ldap_state = arg; + struct timespec ts; + + /** @TODO Should we be doing something to check what servers we rebind to? + Could we get a referral to a machine that we don't want to give our + username and password to? */ + + if (freeit) { + SAFE_FREE(*whop); + if (*credp) { + memset(*credp, '\0', strlen(*credp)); + } + SAFE_FREE(*credp); + } else { + DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n", + ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]")); + + if (ldap_state->anonymous) { + *whop = NULL; + *credp = NULL; + } else { + *whop = SMB_STRDUP(ldap_state->bind_dn); + if (!*whop) { + return LDAP_NO_MEMORY; + } + *credp = SMB_STRDUP(ldap_state->bind_secret); + if (!*credp) { + SAFE_FREE(*whop); + return LDAP_NO_MEMORY; + } + } + *methodp = LDAP_AUTH_SIMPLE; + } + + clock_gettime_mono(&ts); + ldap_state->last_rebind = convert_timespec_to_timeval(ts); + + return 0; +} +#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/ + +/******************************************************************* + a rebind function for authenticated referrals + This version takes a void* that we can shove useful stuff in :-) + and actually does the connection. +******************************************************************/ +#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000) +static int rebindproc_connect_with_state (LDAP *ldap_struct, + LDAP_CONST char *url, + ber_tag_t request, + ber_int_t msgid, void *arg) +{ + struct smbldap_state *ldap_state = + (struct smbldap_state *)arg; + int rc; + struct timespec ts; + int version; + + DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n", + url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]")); + + /* call START_TLS again (ldaps:// is handled by the OpenLDAP library + * itself) before rebinding to another LDAP server to avoid to expose + * our credentials. At least *try* to secure the connection - Guenther */ + + smb_ldap_upgrade_conn(ldap_struct, &version); + smbldap_start_tls(ldap_struct, version); + + /** @TODO Should we be doing something to check what servers we rebind to? + Could we get a referral to a machine that we don't want to give our + username and password to? */ + + rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret); + + /* only set the last rebind timestamp when we did rebind after a + * non-read LDAP operation. That way we avoid the replication sleep + * after a simple redirected search operation - Guenther */ + + switch (request) { + + case LDAP_REQ_MODIFY: + case LDAP_REQ_ADD: + case LDAP_REQ_DELETE: + case LDAP_REQ_MODDN: + case LDAP_REQ_EXTENDED: + DEBUG(10,("rebindproc_connect_with_state: " + "setting last_rebind timestamp " + "(req: 0x%02x)\n", (unsigned int)request)); + clock_gettime_mono(&ts); + ldap_state->last_rebind = convert_timespec_to_timeval(ts); + break; + default: + ZERO_STRUCT(ldap_state->last_rebind); + break; + } + + return rc; +} +#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/ + +/******************************************************************* + Add a rebind function for authenticated referrals +******************************************************************/ +#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000) +#else +# if LDAP_SET_REBIND_PROC_ARGS == 2 +static int rebindproc (LDAP *ldap_struct, char **whop, char **credp, + int *method, int freeit ) +{ + struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct); + + return rebindproc_with_state(ldap_struct, whop, credp, + method, freeit, ldap_state); +} +# endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/ +#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/ + +/******************************************************************* + a rebind function for authenticated referrals + this also does the connection, but no void*. +******************************************************************/ +#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000) +# if LDAP_SET_REBIND_PROC_ARGS == 2 +static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request, + ber_int_t msgid) +{ + struct smbldap_state *ldap_state = smbldap_find_state(ld); + + return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid, + ldap_state); +} +# endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/ +#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/ + +/******************************************************************* + connect to the ldap server under system privilege. +******************************************************************/ +static int smbldap_connect_system(struct smbldap_state *ldap_state) +{ + LDAP *ldap_struct = smbldap_get_ldap(ldap_state); + int rc; + int version; + + /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite + (OpenLDAP) doesn't seem to support it */ + + DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n", + ldap_state->uri, ldap_state->bind_dn)); + +#ifdef HAVE_LDAP_SET_REBIND_PROC +#if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000) +# if LDAP_SET_REBIND_PROC_ARGS == 2 + ldap_set_rebind_proc(ldap_struct, &rebindproc_connect); +# endif +# if LDAP_SET_REBIND_PROC_ARGS == 3 + ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state); +# endif +#else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/ +# if LDAP_SET_REBIND_PROC_ARGS == 2 + ldap_set_rebind_proc(ldap_struct, &rebindproc); +# endif +# if LDAP_SET_REBIND_PROC_ARGS == 3 + ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state); +# endif +#endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/ +#endif + + /* When there is an alternative bind callback is set, + attempt to use it to perform the bind */ + if (ldap_state->bind_callback != NULL) { + /* We have to allow bind callback to be run under become_root/unbecome_root + to make sure within smbd the callback has proper write access to its resources, + like credential cache. This is similar to passdb case where this callback is supposed + to be used. When used outside smbd, become_root()/unbecome_root() are no-op. + */ + become_root(); + rc = ldap_state->bind_callback(ldap_struct, ldap_state, ldap_state->bind_callback_data); + unbecome_root(); + } else { + rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret); + } + + if (rc != LDAP_SUCCESS) { + char *ld_error = NULL; + ldap_get_option(smbldap_get_ldap(ldap_state), + LDAP_OPT_ERROR_STRING, + &ld_error); + DEBUG(ldap_state->num_failures ? 2 : 0, + ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n", + ldap_state->uri, + ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]", + ldap_err2string(rc), + ld_error ? ld_error : "(unknown)")); + SAFE_FREE(ld_error); + ldap_state->num_failures++; + goto done; + } + + ldap_state->num_failures = 0; + ldap_state->paged_results = False; + + ldap_get_option(smbldap_get_ldap(ldap_state), + LDAP_OPT_PROTOCOL_VERSION, &version); + + if (smbldap_has_control(smbldap_get_ldap(ldap_state), ADS_PAGE_CTL_OID) + && version == 3) { + ldap_state->paged_results = True; + } + + DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n")); + DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n", + ldap_state->paged_results ? "does" : "does not")); +done: + if (rc != 0) { + ldap_unbind(ldap_struct); + ldap_state->ldap_struct = NULL; + } + return rc; +} + +static void smbldap_idle_fn(struct tevent_context *tevent_ctx, + struct tevent_timer *te, + struct timeval now_abs, + void *private_data); + +/********************************************************************** + Connect to LDAP server (called before every ldap operation) +*********************************************************************/ +static int smbldap_open(struct smbldap_state *ldap_state) +{ + int rc, opt_rc; + bool reopen = False; + SMB_ASSERT(ldap_state); + + if ((smbldap_get_ldap(ldap_state) != NULL) && + ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < + time_mono(NULL))) { + +#ifdef HAVE_UNIXSOCKET + struct sockaddr_un addr; +#else + struct sockaddr_storage addr; +#endif + socklen_t len = sizeof(addr); + int sd; + + opt_rc = ldap_get_option(smbldap_get_ldap(ldap_state), + LDAP_OPT_DESC, &sd); + if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 ) + reopen = True; + +#ifdef HAVE_UNIXSOCKET + if (opt_rc == 0 && addr.sun_family == AF_UNIX) + reopen = True; +#endif + if (reopen) { + /* the other end has died. reopen. */ + ldap_unbind(smbldap_get_ldap(ldap_state)); + ldap_state->ldap_struct = NULL; + ldap_state->last_ping = (time_t)0; + } else { + ldap_state->last_ping = time_mono(NULL); + } + } + + if (smbldap_get_ldap(ldap_state) != NULL) { + DEBUG(11,("smbldap_open: already connected to the LDAP server\n")); + return LDAP_SUCCESS; + } + + if ((rc = smbldap_open_connection(ldap_state))) { + return rc; + } + + if ((rc = smbldap_connect_system(ldap_state))) { + return rc; + } + + + ldap_state->last_ping = time_mono(NULL); + ldap_state->pid = getpid(); + + TALLOC_FREE(ldap_state->idle_event); + + if (ldap_state->tevent_context != NULL) { + ldap_state->idle_event = tevent_add_timer( + ldap_state->tevent_context, ldap_state, + timeval_current_ofs(SMBLDAP_IDLE_TIME, 0), + smbldap_idle_fn, ldap_state); + } + + DEBUG(4,("The LDAP server is successfully connected\n")); + + return LDAP_SUCCESS; +} + +/********************************************************************** +Disconnect from LDAP server +*********************************************************************/ +static NTSTATUS smbldap_close(struct smbldap_state *ldap_state) +{ + if (!ldap_state) + return NT_STATUS_INVALID_PARAMETER; + + if (smbldap_get_ldap(ldap_state) != NULL) { + ldap_unbind(smbldap_get_ldap(ldap_state)); + ldap_state->ldap_struct = NULL; + } + + smbldap_delete_state(ldap_state); + + TALLOC_FREE(ldap_state->idle_event); + + DEBUG(5,("The connection to the LDAP server was closed\n")); + /* maybe free the results here --metze */ + + return NT_STATUS_OK; +} + +static SIG_ATOMIC_T got_alarm; + +static void gotalarm_sig(int dummy) +{ + got_alarm = 1; +} + +static time_t calc_ldap_abs_endtime(int ldap_to) +{ + if (ldap_to == 0) { + /* No timeout - don't + return a value for + the alarm. */ + return (time_t)0; + } + + /* Make the alarm time one second beyond + the timeout we're setting for the + remote search timeout, to allow that + to fire in preference. */ + + return time_mono(NULL)+ldap_to+1; +} + +static int end_ldap_local_alarm(time_t absolute_endtime, int rc) +{ + if (absolute_endtime) { + alarm(0); + CatchSignal(SIGALRM, SIG_IGN); + if (got_alarm) { + /* Client timeout error code. */ + got_alarm = 0; + return LDAP_TIMEOUT; + } + } + return rc; +} + +static void setup_ldap_local_alarm(struct smbldap_state *ldap_state, time_t absolute_endtime) +{ + time_t now = time_mono(NULL); + + if (absolute_endtime) { + got_alarm = 0; + CatchSignal(SIGALRM, gotalarm_sig); + alarm(absolute_endtime - now); + } + + if (ldap_state->pid != getpid()) { + smbldap_close(ldap_state); + } +} + +static void get_ldap_errs(struct smbldap_state *ldap_state, char **pp_ld_error, int *p_ld_errno) +{ + ldap_get_option(smbldap_get_ldap(ldap_state), + LDAP_OPT_ERROR_NUMBER, p_ld_errno); + + ldap_get_option(smbldap_get_ldap(ldap_state), + LDAP_OPT_ERROR_STRING, pp_ld_error); +} + +static int get_cached_ldap_connect(struct smbldap_state *ldap_state, time_t abs_endtime) +{ + int attempts = 0; + + while (1) { + int rc; + time_t now; + + now = time_mono(NULL); + ldap_state->last_use = now; + + if (abs_endtime && now > abs_endtime) { + smbldap_close(ldap_state); + return LDAP_TIMEOUT; + } + + rc = smbldap_open(ldap_state); + + if (rc == LDAP_SUCCESS) { + return LDAP_SUCCESS; + } + + attempts++; + DEBUG(1, ("Connection to LDAP server failed for the " + "%d try!\n", attempts)); + + if (rc == LDAP_INSUFFICIENT_ACCESS) { + /* The fact that we are non-root or any other + * access-denied condition will not change in the next + * round of trying */ + return rc; + } + + if (got_alarm) { + smbldap_close(ldap_state); + return LDAP_TIMEOUT; + } + + smb_msleep(1000); + + if (got_alarm) { + smbldap_close(ldap_state); + return LDAP_TIMEOUT; + } + } +} + +/********************************************************************* + ********************************************************************/ + +static int smbldap_search_ext(struct smbldap_state *ldap_state, + const char *base, int scope, const char *filter, + const char *attrs[], int attrsonly, + LDAPControl **sctrls, LDAPControl **cctrls, + int sizelimit, LDAPMessage **res) +{ + int rc = LDAP_SERVER_DOWN; + char *utf8_filter; + int to = lp_ldap_timeout(); + time_t abs_endtime = calc_ldap_abs_endtime(to); + struct timeval timeout; + struct timeval *timeout_ptr = NULL; + size_t converted_size; + + SMB_ASSERT(ldap_state); + + DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], " + "scope => [%d]\n", base, filter, scope)); + + if (ldap_state->last_rebind.tv_sec > 0) { + struct timeval tval; + struct timespec ts; + int64_t tdiff = 0; + int sleep_time = 0; + + clock_gettime_mono(&ts); + tval = convert_timespec_to_timeval(ts); + + tdiff = usec_time_diff(&tval, &ldap_state->last_rebind); + tdiff /= 1000; /* Convert to milliseconds. */ + + sleep_time = lp_ldap_replication_sleep()-(int)tdiff; + sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME); + + if (sleep_time > 0) { + /* we wait for the LDAP replication */ + DEBUG(5,("smbldap_search_ext: waiting %d milliseconds " + "for LDAP replication.\n",sleep_time)); + smb_msleep(sleep_time); + DEBUG(5,("smbldap_search_ext: go on!\n")); + } + ZERO_STRUCT(ldap_state->last_rebind); + } + + if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) { + return LDAP_NO_MEMORY; + } + + /* Setup remote timeout for the ldap_search_ext_s call. */ + if (to) { + timeout.tv_sec = to; + timeout.tv_usec = 0; + timeout_ptr = &timeout; + } + + setup_ldap_local_alarm(ldap_state, abs_endtime); + + while (1) { + char *ld_error = NULL; + int ld_errno; + + rc = get_cached_ldap_connect(ldap_state, abs_endtime); + if (rc != LDAP_SUCCESS) { + break; + } + + rc = ldap_search_ext_s(smbldap_get_ldap(ldap_state), + base, scope, + utf8_filter, + discard_const_p(char *, attrs), + attrsonly, sctrls, cctrls, timeout_ptr, + sizelimit, res); + if (rc == LDAP_SUCCESS) { + break; + } + + get_ldap_errs(ldap_state, &ld_error, &ld_errno); + + DEBUG(10, ("Failed search for base: %s, error: %d (%s) " + "(%s)\n", base, ld_errno, + ldap_err2string(rc), + ld_error ? ld_error : "unknown")); + SAFE_FREE(ld_error); + + if (ld_errno != LDAP_SERVER_DOWN) { + break; + } + ldap_unbind(smbldap_get_ldap(ldap_state)); + ldap_state->ldap_struct = NULL; + } + + TALLOC_FREE(utf8_filter); + return end_ldap_local_alarm(abs_endtime, rc); +} + +int smbldap_search(struct smbldap_state *ldap_state, + const char *base, int scope, const char *filter, + const char *attrs[], int attrsonly, + LDAPMessage **res) +{ + return smbldap_search_ext(ldap_state, base, scope, filter, attrs, + attrsonly, NULL, NULL, LDAP_NO_LIMIT, res); +} + +int smbldap_search_paged(struct smbldap_state *ldap_state, + const char *base, int scope, const char *filter, + const char **attrs, int attrsonly, int pagesize, + LDAPMessage **res, void **cookie) +{ + LDAPControl pr; + LDAPControl **rcontrols; + LDAPControl *controls[2] = { NULL, NULL}; + BerElement *cookie_be = NULL; + struct berval *cookie_bv = NULL; + int tmp = 0, i, rc; + bool critical = True; + + *res = NULL; + + DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s]," + "scope => [%d], pagesize => [%d]\n", + base, filter, scope, pagesize)); + + cookie_be = ber_alloc_t(LBER_USE_DER); + if (cookie_be == NULL) { + DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns " + "NULL\n")); + return LDAP_NO_MEMORY; + } + + /* construct cookie */ + if (*cookie != NULL) { + ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie); + ber_bvfree((struct berval *)*cookie); /* don't need it from last time */ + *cookie = NULL; + } else { + ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0); + } + ber_flatten(cookie_be, &cookie_bv); + + pr.ldctl_oid = discard_const_p(char, ADS_PAGE_CTL_OID); + pr.ldctl_iscritical = (char) critical; + pr.ldctl_value.bv_len = cookie_bv->bv_len; + pr.ldctl_value.bv_val = cookie_bv->bv_val; + + controls[0] = ≺ + controls[1] = NULL; + + rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs, + 0, controls, NULL, LDAP_NO_LIMIT, res); + + ber_free(cookie_be, 1); + ber_bvfree(cookie_bv); + + if (rc != 0) { + DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) " + "failed with [%s]\n", filter, ldap_err2string(rc))); + goto done; + } + + DEBUG(3,("smbldap_search_paged: search was successful\n")); + + rc = ldap_parse_result(smbldap_get_ldap(ldap_state), *res, NULL, NULL, + NULL, NULL, &rcontrols, 0); + if (rc != 0) { + DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \ + "with [%s]\n", ldap_err2string(rc))); + goto done; + } + + if (rcontrols == NULL) + goto done; + + for (i=0; rcontrols[i]; i++) { + + if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0) + continue; + + cookie_be = ber_init(&rcontrols[i]->ldctl_value); + ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv); + /* the berval is the cookie, but must be freed when it is all + done */ + if (cookie_bv->bv_len) + *cookie=ber_bvdup(cookie_bv); + else + *cookie=NULL; + ber_bvfree(cookie_bv); + ber_free(cookie_be, 1); + break; + } + ldap_controls_free(rcontrols); +done: + return rc; +} + +int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[]) +{ + int rc = LDAP_SERVER_DOWN; + char *utf8_dn; + time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout()); + size_t converted_size; + + SMB_ASSERT(ldap_state); + + DEBUG(5,("smbldap_modify: dn => [%s]\n", dn )); + + if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) { + return LDAP_NO_MEMORY; + } + + setup_ldap_local_alarm(ldap_state, abs_endtime); + + while (1) { + char *ld_error = NULL; + int ld_errno; + + rc = get_cached_ldap_connect(ldap_state, abs_endtime); + if (rc != LDAP_SUCCESS) { + break; + } + + rc = ldap_modify_s(smbldap_get_ldap(ldap_state), utf8_dn, + attrs); + if (rc == LDAP_SUCCESS) { + break; + } + + get_ldap_errs(ldap_state, &ld_error, &ld_errno); + + DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) " + "(%s)\n", dn, ld_errno, + ldap_err2string(rc), + ld_error ? ld_error : "unknown")); + SAFE_FREE(ld_error); + + if (ld_errno != LDAP_SERVER_DOWN) { + break; + } + ldap_unbind(smbldap_get_ldap(ldap_state)); + ldap_state->ldap_struct = NULL; + } + + TALLOC_FREE(utf8_dn); + return end_ldap_local_alarm(abs_endtime, rc); +} + +int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[]) +{ + int rc = LDAP_SERVER_DOWN; + char *utf8_dn; + time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout()); + size_t converted_size; + + SMB_ASSERT(ldap_state); + + DEBUG(5,("smbldap_add: dn => [%s]\n", dn )); + + if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) { + return LDAP_NO_MEMORY; + } + + setup_ldap_local_alarm(ldap_state, abs_endtime); + + while (1) { + char *ld_error = NULL; + int ld_errno; + + rc = get_cached_ldap_connect(ldap_state, abs_endtime); + if (rc != LDAP_SUCCESS) { + break; + } + + rc = ldap_add_s(smbldap_get_ldap(ldap_state), utf8_dn, attrs); + if (rc == LDAP_SUCCESS) { + break; + } + + get_ldap_errs(ldap_state, &ld_error, &ld_errno); + + DEBUG(10, ("Failed to add dn: %s, error: %d (%s) " + "(%s)\n", dn, ld_errno, + ldap_err2string(rc), + ld_error ? ld_error : "unknown")); + SAFE_FREE(ld_error); + + if (ld_errno != LDAP_SERVER_DOWN) { + break; + } + ldap_unbind(smbldap_get_ldap(ldap_state)); + ldap_state->ldap_struct = NULL; + } + + TALLOC_FREE(utf8_dn); + return end_ldap_local_alarm(abs_endtime, rc); +} + +int smbldap_delete(struct smbldap_state *ldap_state, const char *dn) +{ + int rc = LDAP_SERVER_DOWN; + char *utf8_dn; + time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout()); + size_t converted_size; + + SMB_ASSERT(ldap_state); + + DEBUG(5,("smbldap_delete: dn => [%s]\n", dn )); + + if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) { + return LDAP_NO_MEMORY; + } + + setup_ldap_local_alarm(ldap_state, abs_endtime); + + while (1) { + char *ld_error = NULL; + int ld_errno; + + rc = get_cached_ldap_connect(ldap_state, abs_endtime); + if (rc != LDAP_SUCCESS) { + break; + } + + rc = ldap_delete_s(smbldap_get_ldap(ldap_state), utf8_dn); + if (rc == LDAP_SUCCESS) { + break; + } + + get_ldap_errs(ldap_state, &ld_error, &ld_errno); + + DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) " + "(%s)\n", dn, ld_errno, + ldap_err2string(rc), + ld_error ? ld_error : "unknown")); + SAFE_FREE(ld_error); + + if (ld_errno != LDAP_SERVER_DOWN) { + break; + } + ldap_unbind(smbldap_get_ldap(ldap_state)); + ldap_state->ldap_struct = NULL; + } + + TALLOC_FREE(utf8_dn); + return end_ldap_local_alarm(abs_endtime, rc); +} + +int smbldap_extended_operation(struct smbldap_state *ldap_state, + LDAP_CONST char *reqoid, struct berval *reqdata, + LDAPControl **serverctrls, LDAPControl **clientctrls, + char **retoidp, struct berval **retdatap) +{ + int rc = LDAP_SERVER_DOWN; + time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout()); + + if (!ldap_state) + return (-1); + + setup_ldap_local_alarm(ldap_state, abs_endtime); + + while (1) { + char *ld_error = NULL; + int ld_errno; + + rc = get_cached_ldap_connect(ldap_state, abs_endtime); + if (rc != LDAP_SUCCESS) { + break; + } + + rc = ldap_extended_operation_s(smbldap_get_ldap(ldap_state), + reqoid, + reqdata, serverctrls, + clientctrls, retoidp, retdatap); + if (rc == LDAP_SUCCESS) { + break; + } + + get_ldap_errs(ldap_state, &ld_error, &ld_errno); + + DEBUG(10, ("Extended operation failed with error: " + "%d (%s) (%s)\n", ld_errno, + ldap_err2string(rc), + ld_error ? ld_error : "unknown")); + SAFE_FREE(ld_error); + + if (ld_errno != LDAP_SERVER_DOWN) { + break; + } + ldap_unbind(smbldap_get_ldap(ldap_state)); + ldap_state->ldap_struct = NULL; + } + + return end_ldap_local_alarm(abs_endtime, rc); +} + +/******************************************************************* + run the search by name. +******************************************************************/ +int smbldap_search_suffix (struct smbldap_state *ldap_state, + const char *filter, const char **search_attr, + LDAPMessage ** result) +{ + return smbldap_search(ldap_state, lp_ldap_suffix(), + LDAP_SCOPE_SUBTREE, + filter, search_attr, 0, result); +} + +static void smbldap_idle_fn(struct tevent_context *tevent_ctx, + struct tevent_timer *te, + struct timeval now_abs, + void *private_data) +{ + struct smbldap_state *state = (struct smbldap_state *)private_data; + + TALLOC_FREE(state->idle_event); + + if (smbldap_get_ldap(state) == NULL) { + DEBUG(10,("ldap connection not connected...\n")); + return; + } + + if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) { + DEBUG(10,("ldap connection not idle...\n")); + + /* this needs to be made monotonic clock aware inside tevent: */ + state->idle_event = tevent_add_timer( + tevent_ctx, state, + timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0), + smbldap_idle_fn, + private_data); + return; + } + + DEBUG(7,("ldap connection idle...closing connection\n")); + smbldap_close(state); +} + +/********************************************************************** + Housekeeping + *********************************************************************/ + +void smbldap_free_struct(struct smbldap_state **ldap_state) +{ + smbldap_close(*ldap_state); + + if ((*ldap_state)->bind_secret) { + memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret)); + } + + SAFE_FREE((*ldap_state)->bind_dn); + BURN_FREE_STR((*ldap_state)->bind_secret); + smbldap_set_bind_callback(*ldap_state, NULL, NULL); + + TALLOC_FREE(*ldap_state); + + /* No need to free any further, as it is talloc()ed */ +} + +static int smbldap_state_destructor(struct smbldap_state *state) +{ + smbldap_free_struct(&state); + return 0; +} + + +/********************************************************************** + Initialise the 'general' ldap structures, on which ldap operations may be conducted + *********************************************************************/ + +NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct tevent_context *tevent_ctx, + const char *location, + bool anon, + const char *bind_dn, + const char *bind_secret, + struct smbldap_state **smbldap_state) +{ + *smbldap_state = talloc_zero(mem_ctx, struct smbldap_state); + if (!*smbldap_state) { + DEBUG(0, ("talloc() failed for ldapsam private_data!\n")); + return NT_STATUS_NO_MEMORY; + } + + if (location) { + (*smbldap_state)->uri = talloc_strdup(mem_ctx, location); + } else { + (*smbldap_state)->uri = "ldap://localhost"; + } + + (*smbldap_state)->tevent_context = tevent_ctx; + + if (bind_dn && bind_secret) { + smbldap_set_creds(*smbldap_state, anon, bind_dn, bind_secret); + } + + talloc_set_destructor(*smbldap_state, smbldap_state_destructor); + return NT_STATUS_OK; +} + + char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld, + LDAPMessage *entry) +{ + char *utf8_dn, *unix_dn; + size_t converted_size; + + utf8_dn = ldap_get_dn(ld, entry); + if (!utf8_dn) { + DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n")); + return NULL; + } + if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) { + DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 " + "[%s]\n", utf8_dn)); + return NULL; + } + ldap_memfree(utf8_dn); + return unix_dn; +} + +/******************************************************************* + Check if root-dse has a certain Control or Extension +********************************************************************/ + +static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value) +{ + LDAPMessage *msg = NULL; + LDAPMessage *entry = NULL; + char **values = NULL; + int rc, num_result, num_values, i; + bool result = False; + + if (!attrs[0]) { + DEBUG(3,("smbldap_check_root_dse: nothing to look for\n")); + return False; + } + + if (!strequal(attrs[0], "supportedExtension") && + !strequal(attrs[0], "supportedControl") && + !strequal(attrs[0], "namingContexts")) { + DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0])); + return False; + } + + rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE, + "(objectclass=*)", discard_const_p(char *, attrs), 0 , &msg); + + if (rc != LDAP_SUCCESS) { + DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n")); + return False; + } + + num_result = ldap_count_entries(ld, msg); + + if (num_result != 1) { + DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result)); + goto done; + } + + entry = ldap_first_entry(ld, msg); + + if (entry == NULL) { + DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n")); + goto done; + } + + values = ldap_get_values(ld, entry, attrs[0]); + + if (values == NULL) { + DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0])); + goto done; + } + + num_values = ldap_count_values(values); + + if (num_values == 0) { + DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0])); + goto done; + } + + for (i=0; i<num_values; i++) { + if (strcmp(values[i], value) == 0) + result = True; + } + + + done: + if (values != NULL) + ldap_value_free(values); + if (msg != NULL) + ldap_msgfree(msg); + + return result; + +} + +/******************************************************************* + Check if LDAP-Server supports a certain Control (OID in string format) +********************************************************************/ + +bool smbldap_has_control(LDAP *ld, const char *control) +{ + const char *attrs[] = { "supportedControl", NULL }; + return smbldap_check_root_dse(ld, attrs, control); +} + +/******************************************************************* + Check if LDAP-Server supports a certain Extension (OID in string format) +********************************************************************/ + +bool smbldap_has_extension(LDAP *ld, const char *extension) +{ + const char *attrs[] = { "supportedExtension", NULL }; + return smbldap_check_root_dse(ld, attrs, extension); +} + +/******************************************************************* + Check if LDAP-Server holds a given namingContext +********************************************************************/ + +bool smbldap_has_naming_context(LDAP *ld, const char *naming_context) +{ + const char *attrs[] = { "namingContexts", NULL }; + return smbldap_check_root_dse(ld, attrs, naming_context); +} + +bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret) +{ + ldap_state->anonymous = anon; + + /* free any previously set credential */ + + SAFE_FREE(ldap_state->bind_dn); + smbldap_set_bind_callback(ldap_state, NULL, NULL); + + if (ldap_state->bind_secret) { + /* make sure secrets are zeroed out of memory */ + memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret)); + SAFE_FREE(ldap_state->bind_secret); + } + + if ( ! anon) { + ldap_state->bind_dn = SMB_STRDUP(dn); + ldap_state->bind_secret = SMB_STRDUP(secret); + } + + return True; +} |