/* Unix SMB/CIFS mplementation. 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 2 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, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "includes.h" #include "smbldap.h" #ifndef LDAP_OPT_SUCCESS #define LDAP_OPT_SUCCESS 0 #endif /* 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 */ /* attributes used by Samba 2.2 */ ATTRIB_MAP_ENTRY attrib_map_v22[] = { { LDAP_ATTR_UID, "uid" }, { LDAP_ATTR_UIDNUMBER, LDAP_ATTRIBUTE_UIDNUMBER}, { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER}, { LDAP_ATTR_UNIX_HOME, "homeDirectory" }, { LDAP_ATTR_PWD_LAST_SET, "pwdLastSet" }, { LDAP_ATTR_PWD_CAN_CHANGE, "pwdCanChange" }, { LDAP_ATTR_PWD_MUST_CHANGE, "pwdMustChange" }, { LDAP_ATTR_LOGON_TIME, "logonTime" }, { LDAP_ATTR_LOGOFF_TIME, "logoffTime" }, { LDAP_ATTR_KICKOFF_TIME, "kickoffTime" }, { LDAP_ATTR_CN, "cn" }, { LDAP_ATTR_DISPLAY_NAME, "displayName" }, { LDAP_ATTR_HOME_PATH, "smbHome" }, { LDAP_ATTR_HOME_DRIVE, "homeDrives" }, { LDAP_ATTR_LOGON_SCRIPT, "scriptPath" }, { LDAP_ATTR_PROFILE_PATH, "profilePath" }, { LDAP_ATTR_DESC, "description" }, { LDAP_ATTR_USER_WKS, "userWorkstations"}, { LDAP_ATTR_USER_RID, "rid" }, { LDAP_ATTR_PRIMARY_GROUP_RID, "primaryGroupID"}, { LDAP_ATTR_LMPW, "lmPassword" }, { LDAP_ATTR_NTPW, "ntPassword" }, { LDAP_ATTR_DOMAIN, "domain" }, { LDAP_ATTR_OBJCLASS, "objectClass" }, { LDAP_ATTR_ACB_INFO, "acctFlags" }, { LDAP_ATTR_LIST_END, NULL } }; /* attributes used by Samba 3.0's sambaSamAccount */ ATTRIB_MAP_ENTRY attrib_map_v30[] = { { LDAP_ATTR_UID, "uid" }, { LDAP_ATTR_UIDNUMBER, LDAP_ATTRIBUTE_UIDNUMBER}, { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER}, { LDAP_ATTR_UNIX_HOME, "homeDirectory" }, { LDAP_ATTR_PWD_LAST_SET, "sambaPwdLastSet" }, { LDAP_ATTR_PWD_CAN_CHANGE, "sambaPwdCanChange" }, { LDAP_ATTR_PWD_MUST_CHANGE, "sambaPwdMustChange" }, { LDAP_ATTR_LOGON_TIME, "sambaLogonTime" }, { LDAP_ATTR_LOGOFF_TIME, "sambaLogoffTime" }, { LDAP_ATTR_KICKOFF_TIME, "sambaKickoffTime" }, { LDAP_ATTR_CN, "cn" }, { LDAP_ATTR_DISPLAY_NAME, "displayName" }, { LDAP_ATTR_HOME_DRIVE, "sambaHomeDrive" }, { LDAP_ATTR_HOME_PATH, "sambaHomePath" }, { LDAP_ATTR_LOGON_SCRIPT, "sambaLogonScript" }, { LDAP_ATTR_PROFILE_PATH, "sambaProfilePath" }, { LDAP_ATTR_DESC, "description" }, { LDAP_ATTR_USER_WKS, "sambaUserWorkstations" }, { LDAP_ATTR_USER_SID, LDAP_ATTRIBUTE_SID }, { LDAP_ATTR_PRIMARY_GROUP_SID, "sambaPrimaryGroupSID" }, { LDAP_ATTR_LMPW, "sambaLMPassword" }, { LDAP_ATTR_NTPW, "sambaNTPassword" }, { LDAP_ATTR_DOMAIN, "sambaDomainName" }, { LDAP_ATTR_OBJCLASS, "objectClass" }, { LDAP_ATTR_ACB_INFO, "sambaAcctFlags" }, { LDAP_ATTR_MUNGED_DIAL, "sambaMungedDial" }, { LDAP_ATTR_LIST_END, NULL } }; /* attributes used for alalocating RIDs */ ATTRIB_MAP_ENTRY dominfo_attr_list[] = { { LDAP_ATTR_DOMAIN, "sambaDomainName" }, { LDAP_ATTR_NEXT_RID, "sambaNextRid" }, { LDAP_ATTR_NEXT_USERRID, "sambaNextUserRid" }, { LDAP_ATTR_NEXT_GROUPRID, "sambaNextGroupRid" }, { LDAP_ATTR_DOM_SID, LDAP_ATTRIBUTE_SID }, { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"}, { LDAP_ATTR_OBJCLASS, "objectClass" }, { LDAP_ATTR_LIST_END, NULL }, }; /* Samba 3.0 group mapping attributes */ ATTRIB_MAP_ENTRY groupmap_attr_list[] = { { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER}, { LDAP_ATTR_GROUP_SID, LDAP_ATTRIBUTE_SID }, { LDAP_ATTR_GROUP_TYPE, "sambaGroupType" }, { LDAP_ATTR_DESC, "description" }, { LDAP_ATTR_DISPLAY_NAME, "displayName" }, { LDAP_ATTR_CN, "cn" }, { LDAP_ATTR_OBJCLASS, "objectClass" }, { LDAP_ATTR_LIST_END, NULL } }; ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = { { LDAP_ATTR_GROUP_SID, LDAP_ATTRIBUTE_SID }, { LDAP_ATTR_GROUP_TYPE, "sambaGroupType" }, { LDAP_ATTR_DESC, "description" }, { LDAP_ATTR_DISPLAY_NAME, "displayName" }, { LDAP_ATTR_LIST_END, NULL } }; /* idmap_ldap sambaUnixIdPool */ ATTRIB_MAP_ENTRY idpool_attr_list[] = { { LDAP_ATTR_UIDNUMBER, LDAP_ATTRIBUTE_UIDNUMBER}, { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER}, { LDAP_ATTR_OBJCLASS, "objectClass" }, { LDAP_ATTR_LIST_END, NULL } }; ATTRIB_MAP_ENTRY sidmap_attr_list[] = { { LDAP_ATTR_SID, LDAP_ATTRIBUTE_SID }, { LDAP_ATTR_UIDNUMBER, LDAP_ATTRIBUTE_UIDNUMBER}, { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER}, { LDAP_ATTR_OBJCLASS, "objectClass" }, { LDAP_ATTR_LIST_END, NULL } }; /********************************************************************** perform a simple table lookup and return the attribute name **********************************************************************/ const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key ) { int i = 0; while ( table[i].attrib != LDAP_ATTR_LIST_END ) { if ( table[i].attrib == key ) return table[i].name; i++; } return NULL; } /********************************************************************** Return the list of attribute names from a mapping table **********************************************************************/ char** get_attr_list( ATTRIB_MAP_ENTRY table[] ) { char **names; int i = 0; while ( table[i].attrib != LDAP_ATTR_LIST_END ) i++; i++; names = (char**)malloc( sizeof(char*)*i ); if ( !names ) { DEBUG(0,("get_attr_list: out of memory\n")); return NULL; } i = 0; while ( table[i].attrib != LDAP_ATTR_LIST_END ) { names[i] = strdup( table[i].name ); i++; } names[i] = NULL; return names; } /********************************************************************* Cleanup ********************************************************************/ void free_attr_list( char **list ) { int i = 0; if ( !list ) return; while ( list[i] ) { SAFE_FREE( list[i] ); i+=1; } SAFE_FREE( list ); } /******************************************************************* find the ldap password ******************************************************************/ BOOL fetch_ldap_pw(char **dn, char** pw) { char *key = NULL; size_t size; *dn = smb_xstrdup(lp_ldap_admin_dn()); if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) { SAFE_FREE(*dn); DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n")); } *pw=secrets_fetch(key, &size); SAFE_FREE(key); if (!size) { /* Upgrade 2.2 style entry */ char *p; char* old_style_key = strdup(*dn); char *data; fstring old_style_pw; if (!old_style_key) { DEBUG(0, ("fetch_ldap_pw: strdup failed!\n")); return False; } for (p=old_style_key; *p; p++) if (*p == ',') *p = '/'; data=secrets_fetch(old_style_key, &size); if (!size && size < sizeof(old_style_pw)) { DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n")); SAFE_FREE(old_style_key); SAFE_FREE(*dn); return False; } size = MIN(size, sizeof(fstring)-1); strncpy(old_style_pw, data, size); old_style_pw[size] = 0; SAFE_FREE(data); if (!secrets_store_ldap_pw(*dn, old_style_pw)) { DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n")); SAFE_FREE(old_style_key); SAFE_FREE(*dn); return False; } if (!secrets_delete(old_style_key)) { DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n")); } SAFE_FREE(old_style_key); *pw = smb_xstrdup(old_style_pw); } return True; } /******************************************************************* Search an attribute and return the first value found. ******************************************************************/ BOOL smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry, const char *attribute, pstring value) { char **values; if ( !attribute ) return False; value[0] = '\0'; if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) { DEBUG (10, ("smbldap_get_single_attribute: [%s] = []\n", attribute)); return False; } if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, sizeof(pstring)) == (size_t)-1) { 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; } /************************************************************************ Routine to manage the LDAPMod structure array manage memory used by the array, by each struct, and values ***********************************************************************/ void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value) { 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 reenable. left here so other so re-add similar code --jerry */ if (value == NULL || *value == '\0') return; #endif if (mods == NULL) { mods = (LDAPMod **) malloc(sizeof(LDAPMod *)); if (mods == NULL) { DEBUG(0, ("make_a_mod: out of memory!\n")); return; } 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 = (LDAPMod **) Realloc (mods, (i + 2) * sizeof (LDAPMod *)); if (mods == NULL) { DEBUG(0, ("make_a_mod: out of memory!\n")); return; } mods[i] = (LDAPMod *) malloc(sizeof(LDAPMod)); if (mods[i] == NULL) { DEBUG(0, ("make_a_mod: out of memory!\n")); return; } mods[i]->mod_op = modop; mods[i]->mod_values = NULL; mods[i]->mod_type = strdup(attribute); mods[i + 1] = NULL; } if (value != NULL) { char *utf8_value = NULL; j = 0; if (mods[i]->mod_values != NULL) { for (; mods[i]->mod_values[j] != NULL; j++); } mods[i]->mod_values = (char **)Realloc(mods[i]->mod_values, (j + 2) * sizeof (char *)); if (mods[i]->mod_values == NULL) { DEBUG (0, ("make_a_mod: Memory allocation failure!\n")); return; } if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) { DEBUG (0, ("make_a_mod: String conversion failure!\n")); return; } mods[i]->mod_values[j] = utf8_value; mods[i]->mod_values[j + 1] = NULL; } *modlist = mods; } /********************************************************************** Set attribute to newval in LDAP, regardless of what value the attribute had in LDAP before. *********************************************************************/ void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing, LDAPMod ***mods, const char *attribute, const char *newval) { pstring oldval; BOOL existed; if (existing != NULL) { existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval); } else { existed = False; *oldval = '\0'; } /* all of our string attributes are case insensitive */ if (existed && (StrCaseCmp(oldval, newval) == 0)) { /* Believe it or not, but LDAP will deny a delete and an add at the same time if the values are the same... */ return; } /* 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 ((newval != NULL) && (strlen(newval) > 0)) { smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval); } if (!existed) { /* There has been no value before, so don't delete it. Here's a possible race: We might end up with duplicate attributes */ return; } /* 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. */ smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval); } /********************************************************************** Some varients 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; struct smbldap_state_lookup *tmp; if ((tmp_ldap_state = smbldap_find_state(ld))) { SMB_ASSERT(tmp_ldap_state == smbldap_state); return; } t = smb_xmalloc(sizeof(*t)); ZERO_STRUCTP(t); DLIST_ADD_END(smbldap_state_lookup_list, t, tmp); t->ld = ld; t->smbldap_state = smbldap_state; } /******************************************************************* open a connection to the ldap server. ******************************************************************/ static int smbldap_open_connection (struct smbldap_state *ldap_state) { int rc = LDAP_SUCCESS; int version; BOOL ldap_v3 = False; LDAP **ldap_struct = &ldap_state->ldap_struct; #ifdef HAVE_LDAP_INITIALIZE DEBUG(10, ("smbldap_open_connection: %s\n", ldap_state->uri)); if ((rc = ldap_initialize(ldap_struct, ldap_state->uri)) != LDAP_SUCCESS) { DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc))); return rc; } #else /* Parse the string manually */ { int port = 0; fstring protocol; fstring host; const char *p = ldap_state->uri; SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254); /* skip leading "URL:" (if any) */ if ( strnequal( p, "URL:", 4 ) ) { p += 4; } sscanf(p, "%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 } } #endif /* Store the LDAP pointer in a lookup list */ smbldap_store_state(*ldap_struct, ldap_state); /* Upgrade to LDAPv3 if possible */ if (ldap_get_option(*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS) { if (version != LDAP_VERSION3) { version = LDAP_VERSION3; if (ldap_set_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS) { ldap_v3 = True; } } else { ldap_v3 = True; } } if (lp_ldap_ssl() == LDAP_SSL_START_TLS) { #ifdef LDAP_OPT_X_TLS if (ldap_v3) { 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")); } else { DEBUG(0, ("Need LDAPv3 for Start TLS\n")); return LDAP_OPERATIONS_ERROR; } #else DEBUG(0,("smbldap_open_connection: StartTLS not supported by LDAP client libraries!\n")); return LDAP_OPERATIONS_ERROR; #endif } 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; /** @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); memset(*credp, '\0', strlen(*credp)); SAFE_FREE(*credp); } else { DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n", ldap_state->bind_dn)); *whop = strdup(ldap_state->bind_dn); if (!*whop) { return LDAP_NO_MEMORY; } *credp = strdup(ldap_state->bind_secret); if (!*credp) { SAFE_FREE(*whop); return LDAP_NO_MEMORY; } *methodp = LDAP_AUTH_SIMPLE; } gettimeofday(&(ldap_state->last_rebind),NULL); 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 = arg; int rc; DEBUG(5,("rebindproc_connect_with_state: Rebinding as \"%s\"\n", ldap_state->bind_dn)); /** @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); gettimeofday(&(ldap_state->last_rebind),NULL); 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) { int rc; char *ldap_dn; char *ldap_secret; /* get the password */ if (!fetch_ldap_pw(&ldap_dn, &ldap_secret)) { DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n")); return LDAP_INVALID_CREDENTIALS; } ldap_state->bind_dn = ldap_dn; ldap_state->bind_secret = ldap_secret; /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite (OpenLDAP) doesnt' seem to support it */ DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n", ldap_state->uri, ldap_dn)); #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)*/ rc = ldap_simple_bind_s(ldap_struct, ldap_dn, ldap_secret); if (rc != LDAP_SUCCESS) { char *ld_error = NULL; ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING, &ld_error); DEBUG(ldap_state->num_failures ? 2 : 0, ("failed to bind to server with dn= %s Error: %s\n\t%s\n", ldap_dn ? ldap_dn : "(unknown)", ldap_err2string(rc), ld_error ? ld_error : "(unknown)")); SAFE_FREE(ld_error); ldap_state->num_failures++; return rc; } ldap_state->num_failures = 0; DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n")); return rc; } /********************************************************************** Connect to LDAP server (called before every ldap operation) *********************************************************************/ static int smbldap_open(struct smbldap_state *ldap_state) { int rc; SMB_ASSERT(ldap_state); #ifndef NO_LDAP_SECURITY if (geteuid() != 0) { DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n")); return LDAP_INSUFFICIENT_ACCESS; } #endif if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) { struct sockaddr_un addr; socklen_t len = sizeof(addr); int sd; if (ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd) == 0 && getpeername(sd, (struct sockaddr *) &addr, &len) < 0) { /* the other end has died. reopen. */ ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL); ldap_state->ldap_struct = NULL; ldap_state->last_ping = (time_t)0; } else { ldap_state->last_ping = time(NULL); } } if (ldap_state->ldap_struct != 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, ldap_state->ldap_struct))) { ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL); ldap_state->ldap_struct = NULL; return rc; } ldap_state->last_ping = time(NULL); DEBUG(4,("The LDAP server is succesful 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 (ldap_state->ldap_struct != NULL) { ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL); ldap_state->ldap_struct = NULL; } smbldap_delete_state(ldap_state); DEBUG(5,("The connection to the LDAP server was closed\n")); /* maybe free the results here --metze */ return NT_STATUS_OK; } int smbldap_retry_open(struct smbldap_state *ldap_state, int *attempts) { int rc; SMB_ASSERT(ldap_state && attempts); if (*attempts != 0) { unsigned int sleep_time; uint8 rand_byte; /* Sleep for a random timeout */ rand_byte = (char)(sys_random()); sleep_time = (((*attempts)*(*attempts))/2)*rand_byte*2; /* we retry after (0.5, 1, 2, 3, 4.5, 6) seconds on average. */ DEBUG(3, ("Sleeping for %u milliseconds before reconnecting\n", sleep_time)); msleep(sleep_time); } (*attempts)++; if ((rc = smbldap_open(ldap_state))) { DEBUG(1,("Connection to LDAP Server failed for the %d try!\n",*attempts)); return rc; } return LDAP_SUCCESS; } /********************************************************************* ********************************************************************/ int smbldap_search(struct smbldap_state *ldap_state, const char *base, int scope, const char *filter, char *attrs[], int attrsonly, LDAPMessage **res) { int rc = LDAP_SERVER_DOWN; int attempts = 0; char *utf8_filter; SMB_ASSERT(ldap_state); if (ldap_state->last_rebind.tv_sec > 0) { struct timeval tval; int tdiff = 0; int sleep_time = 0; ZERO_STRUCT(tval); gettimeofday(&tval,NULL); tdiff = 1000000 *(tval.tv_sec - ldap_state->last_rebind.tv_sec) + (tval.tv_usec - ldap_state->last_rebind.tv_usec); sleep_time = ((1000*lp_ldap_rebind_sleep())-tdiff)/1000; if (sleep_time > 0) { /* we wait for the LDAP replication */ DEBUG(5,("smbldap_search: waiting %d milliseconds for LDAP replication.\n",sleep_time)); msleep(sleep_time); DEBUG(5,("smbldap_search: go on!\n")); ZERO_STRUCT(ldap_state->last_rebind); } } if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) { return LDAP_NO_MEMORY; } while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) { if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS) continue; rc = ldap_search_s(ldap_state->ldap_struct, base, scope, utf8_filter, attrs, attrsonly, res); } if (rc == LDAP_SERVER_DOWN) { DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO)); smbldap_close(ldap_state); } ldap_state->last_use = time(NULL); SAFE_FREE(utf8_filter); return rc; } int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[]) { int rc = LDAP_SERVER_DOWN; int attempts = 0; char *utf8_dn; SMB_ASSERT(ldap_state); if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) { return LDAP_NO_MEMORY; } while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) { if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS) continue; rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs); } if (rc == LDAP_SERVER_DOWN) { DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO)); smbldap_close(ldap_state); } ldap_state->last_use = time(NULL); SAFE_FREE(utf8_dn); return rc; } int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[]) { int rc = LDAP_SERVER_DOWN; int attempts = 0; char *utf8_dn; SMB_ASSERT(ldap_state); if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) { return LDAP_NO_MEMORY; } while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) { if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS) continue; rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs); } if (rc == LDAP_SERVER_DOWN) { DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO)); smbldap_close(ldap_state); } ldap_state->last_use = time(NULL); SAFE_FREE(utf8_dn); return rc; } int smbldap_delete(struct smbldap_state *ldap_state, const char *dn) { int rc = LDAP_SERVER_DOWN; int attempts = 0; char *utf8_dn; SMB_ASSERT(ldap_state); if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) { return LDAP_NO_MEMORY; } while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) { if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS) continue; rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn); } if (rc == LDAP_SERVER_DOWN) { DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO)); smbldap_close(ldap_state); } ldap_state->last_use = time(NULL); SAFE_FREE(utf8_dn); return 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; int attempts = 0; if (!ldap_state) return (-1); while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) { if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS) continue; rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid, reqdata, serverctrls, clientctrls, retoidp, retdatap); } if (rc == LDAP_SERVER_DOWN) { DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO)); smbldap_close(ldap_state); } ldap_state->last_use = time(NULL); return rc; } /******************************************************************* run the search by name. ******************************************************************/ int smbldap_search_suffix (struct smbldap_state *ldap_state, const char *filter, char **search_attr, LDAPMessage ** result) { int scope = LDAP_SCOPE_SUBTREE; int rc; DEBUG(2, ("smbldap_search_suffix: searching for:[%s]\n", filter)); rc = smbldap_search(ldap_state, lp_ldap_suffix(), scope, filter, search_attr, 0, result); if (rc != LDAP_SUCCESS) { char *ld_error = NULL; ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING, &ld_error); DEBUG(0,("smbldap_search_suffix: Problem during the LDAP search: %s (%s)\n", ld_error?ld_error:"(unknown)", ldap_err2string (rc))); DEBUG(3,("smbldap_search_suffix: Query was: %s, %s\n", lp_ldap_suffix(), filter)); SAFE_FREE(ld_error); } return rc; } static void smbldap_idle_fn(void **data, time_t *interval, time_t now) { struct smbldap_state *state = (struct smbldap_state *)(*data); if (state->ldap_struct == NULL) { DEBUG(10,("ldap connection not connected...\n")); return; } if ((state->last_use+SMBLDAP_IDLE_TIME) > now) { DEBUG(10,("ldap connection not idle...\n")); 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); SAFE_FREE((*ldap_state)->bind_secret); smb_unregister_idle_event((*ldap_state)->event_id); *ldap_state = NULL; /* No need to free any further, as it is talloc()ed */ } /********************************************************************** Intitalise the 'general' ldap structures, on which ldap operations may be conducted *********************************************************************/ NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, const char *location, struct smbldap_state **smbldap_state) { *smbldap_state = talloc_zero(mem_ctx, sizeof(**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)->event_id = smb_register_idle_event(smbldap_idle_fn, (void *)(*smbldap_state), SMBLDAP_IDLE_TIME); if ((*smbldap_state)->event_id == SMB_EVENT_ID_INVALID) { DEBUG(0,("Failed to register LDAP idle event!\n")); return NT_STATUS_INVALID_HANDLE; } return NT_STATUS_OK; } /******************************************************************* Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX. ********************************************************************/ char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry) { char *utf8_dn, *unix_dn; utf8_dn = ldap_get_dn(ld, entry); if (!utf8_dn) { DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n")); return NULL; } if (pull_utf8_allocate((void **) &unix_dn, utf8_dn) == (size_t)-1) { DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn)); return NULL; } ldap_memfree(utf8_dn); return unix_dn; }