diff options
Diffstat (limited to 'source3/lib/smbldap.c')
| -rw-r--r-- | source3/lib/smbldap.c | 1262 |
1 files changed, 1262 insertions, 0 deletions
diff --git a/source3/lib/smbldap.c b/source3/lib/smbldap.c new file mode 100644 index 0000000000..39c1990dec --- /dev/null +++ b/source3/lib/smbldap.c @@ -0,0 +1,1262 @@ +/* + 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 + + 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 */ + + +/* 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_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; + } + + 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] = [<does not exist>]\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 && !strcasecmp(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) +{ + char **values = NULL; + + if (existing != NULL) { + values = ldap_get_values(ldap_struct, existing, attribute); + } + + /* all of our string attributes are case insensitive */ + + if ((values != NULL) && (values[0] != NULL) && + StrCaseCmp(values[0], 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... */ + + ldap_value_free(values); + 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 (values == NULL) { + /* 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, values[0]); + ldap_value_free(values); +} + + +/********************************************************************** + 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 ( strncasecmp( p, "URL:", 4 ) == 0 ) { + p += 4; + } + + sscanf(p, "%10[^:]://%254s[^:]:%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; + } + 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); + + 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 (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); + } + + 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); + } + + 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); + } + + 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); + } + + 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); + } + + 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; +} + +/********************************************************************** + 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); + + *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"; + } + return NT_STATUS_OK; +} + +/********************************************************************** + Add the sambaDomain to LDAP, so we don't have to search for this stuff + again. This is a once-add operation for now. + + TODO: Add other attributes, and allow modification. +*********************************************************************/ +static NTSTATUS add_new_domain_info(struct smbldap_state *ldap_state, + const char *domain_name) +{ + fstring sid_string; + fstring algorithmic_rid_base_string; + pstring filter, dn; + LDAPMod **mods = NULL; + int rc; + int ldap_op; + LDAPMessage *result = NULL; + int num_result; + char **attr_list; + + slprintf (filter, sizeof (filter) - 1, "(&(%s=%s)(objectclass=%s))", + get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), + domain_name, LDAP_OBJ_DOMINFO); + + attr_list = get_attr_list( dominfo_attr_list ); + rc = smbldap_search_suffix(ldap_state, filter, attr_list, &result); + free_attr_list( attr_list ); + + if (rc != LDAP_SUCCESS) { + return NT_STATUS_UNSUCCESSFUL; + } + + num_result = ldap_count_entries(ldap_state->ldap_struct, result); + + if (num_result > 1) { + DEBUG (0, ("More than domain with that name exists: bailing out!\n")); + ldap_msgfree(result); + return NT_STATUS_UNSUCCESSFUL; + } + + /* Check if we need to add an entry */ + DEBUG(3,("Adding new domain\n")); + ldap_op = LDAP_MOD_ADD; + + snprintf(dn, sizeof(dn), "%s=%s,%s", get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), + domain_name, lp_ldap_suffix()); + + /* Free original search */ + ldap_msgfree(result); + + /* make the changes - the entry *must* not already have samba attributes */ + smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), + domain_name); + + /* If we don't have an entry, then ask secrets.tdb for what it thinks. + It may choose to make it up */ + + sid_to_string(sid_string, get_global_sam_sid()); + smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOM_SID), sid_string); + + slprintf(algorithmic_rid_base_string, sizeof(algorithmic_rid_base_string) - 1, "%i", algorithmic_rid_base()); + smbldap_set_mod(&mods, LDAP_MOD_ADD, get_attr_key2string(dominfo_attr_list, LDAP_ATTR_ALGORITHMIC_RID_BASE), + algorithmic_rid_base_string); + smbldap_set_mod(&mods, LDAP_MOD_ADD, "objectclass", LDAP_OBJ_DOMINFO); + + switch(ldap_op) + { + case LDAP_MOD_ADD: + rc = smbldap_add(ldap_state, dn, mods); + break; + case LDAP_MOD_REPLACE: + rc = smbldap_modify(ldap_state, dn, mods); + break; + default: + DEBUG(0,("Wrong LDAP operation type: %d!\n", ldap_op)); + return NT_STATUS_INVALID_PARAMETER; + } + + if (rc!=LDAP_SUCCESS) { + char *ld_error = NULL; + ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING, &ld_error); + DEBUG(1,("failed to %s domain dn= %s with: %s\n\t%s\n", + ldap_op == LDAP_MOD_ADD ? "add" : "modify", + dn, ldap_err2string(rc), + ld_error?ld_error:"unknown")); + SAFE_FREE(ld_error); + + ldap_mods_free(mods, True); + return NT_STATUS_UNSUCCESSFUL; + } + + DEBUG(2,("added: domain = %s in the LDAP database\n", domain_name)); + ldap_mods_free(mods, True); + return NT_STATUS_OK; +} + +/********************************************************************** +Search for the domain info entry +*********************************************************************/ +NTSTATUS smbldap_search_domain_info(struct smbldap_state *ldap_state, + LDAPMessage ** result, const char *domain_name, + BOOL try_add) +{ + NTSTATUS ret = NT_STATUS_UNSUCCESSFUL; + pstring filter; + int rc; + char **attr_list; + int count; + + snprintf(filter, sizeof(filter)-1, "(&(objectClass=%s)(%s=%s))", + LDAP_OBJ_DOMINFO, + get_attr_key2string(dominfo_attr_list, LDAP_ATTR_DOMAIN), + domain_name); + + DEBUG(2, ("Searching for:[%s]\n", filter)); + + + attr_list = get_attr_list( dominfo_attr_list ); + rc = smbldap_search_suffix(ldap_state, filter, attr_list , result); + free_attr_list( attr_list ); + + if (rc != LDAP_SUCCESS) { + DEBUG(2,("Problem during LDAPsearch: %s\n", ldap_err2string (rc))); + DEBUG(2,("Query was: %s, %s\n", lp_ldap_suffix(), filter)); + } else if (ldap_count_entries(ldap_state->ldap_struct, *result) < 1) { + DEBUG(3, ("Got no domain info entries for domain\n")); + ldap_msgfree(*result); + *result = NULL; + if (try_add && NT_STATUS_IS_OK(ret = add_new_domain_info(ldap_state, domain_name))) { + return smbldap_search_domain_info(ldap_state, result, domain_name, False); + } + else { + DEBUG(0, ("Adding domain info for %s failed with %s\n", + domain_name, nt_errstr(ret))); + return ret; + } + } else if ((count = ldap_count_entries(ldap_state->ldap_struct, *result)) > 1) { + DEBUG(0, ("Got too many (%d) domain info entries for domain %s\n", + count, domain_name)); + ldap_msgfree(*result); + *result = NULL; + return ret; + } else { + return NT_STATUS_OK; + } + + return ret; +} + |