r4088: Get medieval on our ass about malloc.... :-). Take control of all our allocation
[samba.git] / source3 / passdb / secrets.c
index b3507a139281348de3032632db52987e0432a1b8..6be63e4f9d6f7301697d9cf5b12d2c81744556dc 100644 (file)
@@ -1,7 +1,10 @@
 /* 
    Unix SMB/CIFS implementation.
    Copyright (C) Andrew Tridgell 1992-2001
-   
+   Copyright (C) Andrew Bartlett      2002
+   Copyright (C) Rafal Szczesniak     2002
+   Copyright (C) Tim Potter           2001
+
    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
 
 #include "includes.h"
 
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_PASSDB
+
 static TDB_CONTEXT *tdb;
 
+/**
+ * Use a TDB to store an incrementing random seed.
+ *
+ * Initialised to the current pid, the very first time Samba starts,
+ * and incremented by one each time it is needed.  
+ * 
+ * @note Not called by systems with a working /dev/urandom.
+ */
+static void get_rand_seed(int *new_seed) 
+{
+       *new_seed = sys_getpid();
+       if (tdb) {
+               tdb_change_int32_atomic(tdb, "INFO/random_seed", new_seed, 1);
+       }
+}
+
 /* open up the secrets database */
 BOOL secrets_init(void)
 {
        pstring fname;
+       unsigned char dummy;
 
        if (tdb)
                return True;
@@ -41,19 +64,31 @@ BOOL secrets_init(void)
                DEBUG(0,("Failed to open %s\n", fname));
                return False;
        }
+
+       /**
+        * Set a reseed function for the crypto random generator 
+        * 
+        * This avoids a problem where systems without /dev/urandom
+        * could send the same challenge to multiple clients
+        */
+       set_rand_reseed_callback(get_rand_seed);
+
+       /* Ensure that the reseed is done now, while we are root, etc */
+       generate_random_buffer(&dummy, sizeof(dummy));
+
        return True;
 }
 
 /* read a entry from the secrets database - the caller must free the result
    if size is non-null then the size of the entry is put in there
  */
-void *secrets_fetch(char *key, size_t *size)
+void *secrets_fetch(const char *key, size_t *size)
 {
        TDB_DATA kbuf, dbuf;
        secrets_init();
        if (!tdb)
                return NULL;
-       kbuf.dptr = key;
+       kbuf.dptr = (char *)key;
        kbuf.dsize = strlen(key);
        dbuf = tdb_fetch(tdb, kbuf);
        if (size)
@@ -63,15 +98,15 @@ void *secrets_fetch(char *key, size_t *size)
 
 /* store a secrets entry 
  */
-BOOL secrets_store(char *key, void *data, size_t size)
+BOOL secrets_store(const char *key, const void *data, size_t size)
 {
        TDB_DATA kbuf, dbuf;
        secrets_init();
        if (!tdb)
                return False;
-       kbuf.dptr = key;
+       kbuf.dptr = (char *)key;
        kbuf.dsize = strlen(key);
-       dbuf.dptr = data;
+       dbuf.dptr = (char *)data;
        dbuf.dsize = size;
        return tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) == 0;
 }
@@ -79,34 +114,40 @@ BOOL secrets_store(char *key, void *data, size_t size)
 
 /* delete a secets database entry
  */
-BOOL secrets_delete(char *key)
+BOOL secrets_delete(const char *key)
 {
        TDB_DATA kbuf;
        secrets_init();
        if (!tdb)
                return False;
-       kbuf.dptr = key;
+       kbuf.dptr = (char *)key;
        kbuf.dsize = strlen(key);
        return tdb_delete(tdb, kbuf) == 0;
 }
 
-BOOL secrets_store_domain_sid(char *domain, DOM_SID *sid)
+BOOL secrets_store_domain_sid(const char *domain, const DOM_SID *sid)
 {
        fstring key;
+       BOOL ret;
 
        slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_SID, domain);
-       strupper(key);
-       return secrets_store(key, sid, sizeof(DOM_SID));
+       strupper_m(key);
+       ret = secrets_store(key, sid, sizeof(DOM_SID));
+
+       /* Force a re-query, in case we modified our domain */
+       if (ret)
+               reset_global_sam_sid();
+       return ret;
 }
 
-BOOL secrets_fetch_domain_sid(char *domain, DOM_SID *sid)
+BOOL secrets_fetch_domain_sid(const char *domain, DOM_SID *sid)
 {
        DOM_SID *dyn_sid;
        fstring key;
        size_t size;
 
        slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_SID, domain);
-       strupper(key);
+       strupper_m(key);
        dyn_sid = (DOM_SID *)secrets_fetch(key, &size);
 
        if (dyn_sid == NULL)
@@ -123,17 +164,61 @@ BOOL secrets_fetch_domain_sid(char *domain, DOM_SID *sid)
        return True;
 }
 
+BOOL secrets_store_domain_guid(const char *domain, struct uuid *guid)
+{
+       fstring key;
 
-/************************************************************************
-form a key for fetching the machine trust account password
-************************************************************************/
-char *trust_keystr(char *domain)
+       slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
+       strupper_m(key);
+       return secrets_store(key, guid, sizeof(struct uuid));
+}
+
+BOOL secrets_fetch_domain_guid(const char *domain, struct uuid *guid)
+{
+       struct uuid *dyn_guid;
+       fstring key;
+       size_t size;
+       struct uuid new_guid;
+
+       slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
+       strupper_m(key);
+       dyn_guid = (struct uuid *)secrets_fetch(key, &size);
+
+       if ((!dyn_guid) && (lp_server_role() == ROLE_DOMAIN_PDC)) {
+               smb_uuid_generate_random(&new_guid);
+               if (!secrets_store_domain_guid(domain, &new_guid))
+                       return False;
+               dyn_guid = (struct uuid *)secrets_fetch(key, &size);
+               if (dyn_guid == NULL)
+                       return False;
+       }
+
+       if (size != sizeof(struct uuid))
+       { 
+               DEBUG(1,("UUID size %d is wrong!\n", (int)size));
+               SAFE_FREE(dyn_guid);
+               return False;
+       }
+
+       *guid = *dyn_guid;
+       SAFE_FREE(dyn_guid);
+       return True;
+}
+
+/**
+ * Form a key for fetching the machine trust account password
+ *
+ * @param domain domain name
+ *
+ * @return stored password's key
+ **/
+const char *trust_keystr(const char *domain)
 {
        static fstring keystr;
 
        slprintf(keystr,sizeof(keystr)-1,"%s/%s", 
                 SECRETS_MACHINE_ACCT_PASS, domain);
-       strupper(keystr);
+       strupper_m(keystr);
 
        return keystr;
 }
@@ -141,35 +226,69 @@ char *trust_keystr(char *domain)
 /**
  * Form a key for fetching a trusted domain password
  *
- * @param domain domain name
+ * @param domain trusted domain name
  *
  * @return stored password's key
  **/
-char *trustdom_keystr(char *domain)
+static char *trustdom_keystr(const char *domain)
 {
-       static char* keystr;
+       static pstring keystr;
 
-       asprintf(&keystr, "%s/%s", SECRETS_DOMTRUST_ACCT_PASS, domain);
-       strupper(keystr);
+       pstr_sprintf(keystr, "%s/%s", SECRETS_DOMTRUST_ACCT_PASS, domain);
+       strupper_m(keystr);
                
        return keystr;
 }
 
 /************************************************************************
- Routine to get the machine trust account password for a domain.
+ Lock the trust password entry.
+************************************************************************/
+
+BOOL secrets_lock_trust_account_password(const char *domain, BOOL dolock)
+{
+       if (!tdb)
+               return False;
+
+       if (dolock)
+               return (tdb_lock_bystring(tdb, trust_keystr(domain),0) == 0);
+       else
+               tdb_unlock_bystring(tdb, trust_keystr(domain));
+       return True;
+}
+
+/************************************************************************
+ Routine to get the default secure channel type for trust accounts
+************************************************************************/
+
+uint32 get_default_sec_channel(void) 
+{
+       if (lp_server_role() == ROLE_DOMAIN_BDC || 
+           lp_server_role() == ROLE_DOMAIN_PDC) {
+               return SEC_CHAN_BDC;
+       } else {
+               return SEC_CHAN_WKSTA;
+       }
+}
+
+/************************************************************************
+ Routine to get the trust account password for a domain.
+ The user of this function must have locked the trust password file using
+ the above secrets_lock_trust_account_password().
 ************************************************************************/
-BOOL secrets_fetch_trust_account_password(char *domain, uint8 ret_pwd[16],
-                                         time_t *pass_last_set_time)
+
+BOOL secrets_fetch_trust_account_password(const char *domain, uint8 ret_pwd[16],
+                                         time_t *pass_last_set_time,
+                                         uint32 *channel)
 {
        struct machine_acct_pass *pass;
        char *plaintext;
        size_t size;
 
-       plaintext = secrets_fetch_machine_password();
+       plaintext = secrets_fetch_machine_password(domain, pass_last_set_time, 
+                                                  channel);
        if (plaintext) {
-               /* we have an ADS password - use that */
-               DEBUG(4,("Using ADS machine password\n"));
-               E_md4hash((uchar *)plaintext, ret_pwd);
+               DEBUG(4,("Using cleartext machine password\n"));
+               E_md4hash(plaintext, ret_pwd);
                SAFE_FREE(plaintext);
                return True;
        }
@@ -187,47 +306,66 @@ BOOL secrets_fetch_trust_account_password(char *domain, uint8 ret_pwd[16],
        if (pass_last_set_time) *pass_last_set_time = pass->mod_time;
        memcpy(ret_pwd, pass->hash, 16);
        SAFE_FREE(pass);
+
+       if (channel) 
+               *channel = get_default_sec_channel();
+
        return True;
 }
 
 /************************************************************************
  Routine to get account password to trusted domain
 ************************************************************************/
-BOOL secrets_fetch_trusted_domain_password(char *domain, char** pwd,
-                               DOM_SID *sid, time_t *pass_last_set_time)
+
+BOOL secrets_fetch_trusted_domain_password(const char *domain, char** pwd,
+                                           DOM_SID *sid, time_t *pass_last_set_time)
 {
-       struct trusted_dom_pass *pass;
+       struct trusted_dom_pass pass;
        size_t size;
+       
+       /* unpacking structures */
+       char* pass_buf;
+       int pass_len = 0;
 
-       if (!(pass = secrets_fetch(trustdom_keystr(domain), &size))) {
+       ZERO_STRUCT(pass);
+
+       /* fetching trusted domain password structure */
+       if (!(pass_buf = secrets_fetch(trustdom_keystr(domain), &size))) {
                DEBUG(5, ("secrets_fetch failed!\n"));
                return False;
        }
-       
-       if (size != sizeof(*pass)) {
-               DEBUG(0, ("secrets were of incorrect size!\n"));
+
+       /* unpack trusted domain password */
+       pass_len = tdb_trusted_dom_pass_unpack(pass_buf, size, &pass);
+       SAFE_FREE(pass_buf);
+
+       if (pass_len != size) {
+               DEBUG(5, ("Invalid secrets size. Unpacked data doesn't match trusted_dom_pass structure.\n"));
                return False;
        }
-       
+                       
+       /* the trust's password */      
        if (pwd) {
-               *pwd = strdup(pass->pass);
+               *pwd = SMB_STRDUP(pass.pass);
                if (!*pwd) {
                        return False;
                }
        }
 
-       if (pass_last_set_time) *pass_last_set_time = pass->mod_time;
+       /* last change time */
+       if (pass_last_set_time) *pass_last_set_time = pass.mod_time;
 
-       memcpy(&sid, &(pass->domain_sid), sizeof(sid));
-       SAFE_FREE(pass);
-       
+       /* domain sid */
+       sid_copy(sid, &pass.domain_sid);
+               
        return True;
 }
 
 /************************************************************************
  Routine to set the trust account password for a domain.
 ************************************************************************/
-BOOL secrets_store_trust_account_password(char *domain, uint8 new_pwd[16])
+
+BOOL secrets_store_trust_account_password(const char *domain, uint8 new_pwd[16])
 {
        struct machine_acct_pass pass;
 
@@ -238,7 +376,7 @@ BOOL secrets_store_trust_account_password(char *domain, uint8 new_pwd[16])
 }
 
 /**
- * Routine to set the password for trusted domain
+ * Routine to store the password for trusted domain
  *
  * @param domain remote domain name
  * @param pwd plain text password of trust relationship
@@ -247,34 +385,81 @@ BOOL secrets_store_trust_account_password(char *domain, uint8 new_pwd[16])
  * @return true if succeeded
  **/
 
-BOOL secrets_store_trusted_domain_password(char* domain, char* pwd,
-                                          DOM_SID sid)
-{
+BOOL secrets_store_trusted_domain_password(const char* domain, smb_ucs2_t *uni_dom_name,
+                                           size_t uni_name_len, const char* pwd,
+                                           DOM_SID sid)
+{      
+       /* packing structures */
+       pstring pass_buf;
+       int pass_len = 0;
+       int pass_buf_len = sizeof(pass_buf);
+       
        struct trusted_dom_pass pass;
        ZERO_STRUCT(pass);
+       
+       /* unicode domain name and its length */
+       if (!uni_dom_name)
+               return False;
+               
+       strncpy_w(pass.uni_name, uni_dom_name, sizeof(pass.uni_name) - 1);
+       pass.uni_name_len = uni_name_len;
 
+       /* last change time */
        pass.mod_time = time(NULL);
 
+       /* password of the trust */
        pass.pass_len = strlen(pwd);
        fstrcpy(pass.pass, pwd);
 
-       memcpy(&(pass.domain_sid), &sid, sizeof(sid));
+       /* domain sid */
+       sid_copy(&pass.domain_sid, &sid);
        
-       return secrets_store(trustdom_keystr(domain), (void *)&pass, sizeof(pass));
+       pass_len = tdb_trusted_dom_pass_pack(pass_buf, pass_buf_len, &pass);
+
+       return secrets_store(trustdom_keystr(domain), (void *)&pass_buf, pass_len);
 }
 
 /************************************************************************
  Routine to set the plaintext machine account password for a realm
 the password is assumed to be a null terminated ascii string
 ************************************************************************/
-BOOL secrets_store_machine_password(char *pass)
+
+BOOL secrets_store_machine_password(const char *pass, const char *domain, uint32 sec_channel)
 {
-       char *key;
+       char *key = NULL;
        BOOL ret;
-       asprintf(&key, "%s/%s", SECRETS_MACHINE_PASSWORD, lp_workgroup());
-       strupper(key);
+       uint32 last_change_time;
+       uint32 sec_channel_type;
+
+       asprintf(&key, "%s/%s", SECRETS_MACHINE_PASSWORD, domain);
+       if (!key) 
+               return False;
+       strupper_m(key);
+
        ret = secrets_store(key, pass, strlen(pass)+1);
-       free(key);
+       SAFE_FREE(key);
+
+       if (!ret)
+               return ret;
+       
+       asprintf(&key, "%s/%s", SECRETS_MACHINE_LAST_CHANGE_TIME, domain);
+       if (!key) 
+               return False;
+       strupper_m(key);
+
+       SIVAL(&last_change_time, 0, time(NULL));
+       ret = secrets_store(key, &last_change_time, sizeof(last_change_time));
+       SAFE_FREE(key);
+
+       asprintf(&key, "%s/%s", SECRETS_MACHINE_SEC_CHANNEL_TYPE, domain);
+       if (!key) 
+               return False;
+       strupper_m(key);
+
+       SIVAL(&sec_channel_type, 0, sec_channel);
+       ret = secrets_store(key, &sec_channel_type, sizeof(sec_channel_type));
+       SAFE_FREE(key);
+
        return ret;
 }
 
@@ -283,14 +468,47 @@ BOOL secrets_store_machine_password(char *pass)
  Routine to fetch the plaintext machine account password for a realm
 the password is assumed to be a null terminated ascii string
 ************************************************************************/
-char *secrets_fetch_machine_password(void)
+char *secrets_fetch_machine_password(const char *domain, 
+                                    time_t *pass_last_set_time,
+                                    uint32 *channel)
 {
-       char *key;
+       char *key = NULL;
        char *ret;
-       asprintf(&key, "%s/%s", SECRETS_MACHINE_PASSWORD, lp_workgroup());
-       strupper(key);
+       asprintf(&key, "%s/%s", SECRETS_MACHINE_PASSWORD, domain);
+       strupper_m(key);
        ret = (char *)secrets_fetch(key, NULL);
-       free(key);
+       SAFE_FREE(key);
+       
+       if (pass_last_set_time) {
+               size_t size;
+               uint32 *last_set_time;
+               asprintf(&key, "%s/%s", SECRETS_MACHINE_LAST_CHANGE_TIME, domain);
+               strupper_m(key);
+               last_set_time = secrets_fetch(key, &size);
+               if (last_set_time) {
+                       *pass_last_set_time = IVAL(last_set_time,0);
+                       SAFE_FREE(last_set_time);
+               } else {
+                       *pass_last_set_time = 0;
+               }
+               SAFE_FREE(key);
+       }
+       
+       if (channel) {
+               size_t size;
+               uint32 *channel_type;
+               asprintf(&key, "%s/%s", SECRETS_MACHINE_SEC_CHANNEL_TYPE, domain);
+               strupper_m(key);
+               channel_type = secrets_fetch(key, &size);
+               if (channel_type) {
+                       *channel = IVAL(channel_type,0);
+                       SAFE_FREE(channel_type);
+               } else {
+                       *channel = get_default_sec_channel();
+               }
+               SAFE_FREE(key);
+       }
+       
        return ret;
 }
 
@@ -300,7 +518,7 @@ char *secrets_fetch_machine_password(void)
  Routine to delete the machine trust account password file for a domain.
 ************************************************************************/
 
-BOOL trust_password_delete(char *domain)
+BOOL trust_password_delete(const char *domain)
 {
        return secrets_delete(trust_keystr(domain));
 }
@@ -308,52 +526,310 @@ BOOL trust_password_delete(char *domain)
 /************************************************************************
  Routine to delete the password for trusted domain
 ************************************************************************/
-BOOL trusted_domain_password_delete(char *domain)
+
+BOOL trusted_domain_password_delete(const char *domain)
 {
        return secrets_delete(trustdom_keystr(domain));
 }
 
 
-/*******************************************************************
- Reset the 'done' variables so after a client process is created
- from a fork call these calls will be re-done. This should be
- expanded if more variables need reseting.
- ******************************************************************/
+BOOL secrets_store_ldap_pw(const char* dn, char* pw)
+{
+       char *key = NULL;
+       BOOL ret;
+       
+       if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, dn) < 0) {
+               DEBUG(0, ("secrets_store_ldap_pw: asprintf failed!\n"));
+               return False;
+       }
+               
+       ret = secrets_store(key, pw, strlen(pw)+1);
+       
+       SAFE_FREE(key);
+       return ret;
+}
+
+
+/**
+ * Get trusted domains info from secrets.tdb.
+ *
+ * The linked list is allocated on the supplied talloc context, caller gets to destroy
+ * when done.
+ *
+ * @param ctx Allocation context
+ * @param enum_ctx Starting index, eg. we can start fetching at third
+ *        or sixth trusted domain entry. Zero is the first index.
+ *        Value it is set to is the enum context for the next enumeration.
+ * @param num_domains Number of domain entries to fetch at one call
+ * @param domains Pointer to array of trusted domain structs to be filled up
+ *
+ * @return nt status code of rpc response
+ **/ 
 
-void reset_globals_after_fork(void)
+NTSTATUS secrets_get_trusted_domains(TALLOC_CTX* ctx, int* enum_ctx, unsigned int max_num_domains,
+                                     int *num_domains, TRUSTDOM ***domains)
 {
-       unsigned char dummy;
+       TDB_LIST_NODE *keys, *k;
+       TRUSTDOM *dom = NULL;
+       char *pattern;
+       unsigned int start_idx;
+       uint32 idx = 0;
+       size_t size, packed_size = 0;
+       fstring dom_name;
+       char *packed_pass;
+       struct trusted_dom_pass *pass = TALLOC_ZERO_P(ctx, struct trusted_dom_pass);
+       NTSTATUS status;
+
+       if (!secrets_init()) return NT_STATUS_ACCESS_DENIED;
+       
+       if (!pass) {
+               DEBUG(0, ("talloc_zero failed!\n"));
+               return NT_STATUS_NO_MEMORY;
+       }
+                               
+       *num_domains = 0;
+       start_idx = *enum_ctx;
+
+       /* generate searching pattern */
+       if (!(pattern = talloc_asprintf(ctx, "%s/*", SECRETS_DOMTRUST_ACCT_PASS))) {
+               DEBUG(0, ("secrets_get_trusted_domains: talloc_asprintf() failed!\n"));
+               return NT_STATUS_NO_MEMORY;
+       }
 
-       secrets_init();
+       DEBUG(5, ("secrets_get_trusted_domains: looking for %d domains, starting at index %d\n", 
+                 max_num_domains, *enum_ctx));
 
-       /*
-        * Increment the global seed value to ensure every smbd starts
-        * with a new random seed.
+       *domains = TALLOC_ZERO_ARRAY(ctx, TRUSTDOM *, max_num_domains);
+
+       /* fetching trusted domains' data and collecting them in a list */
+       keys = tdb_search_keys(tdb, pattern);
+
+       /* 
+        * if there's no keys returned ie. no trusted domain,
+        * return "no more entries" code
         */
+       status = NT_STATUS_NO_MORE_ENTRIES;
 
-       if (tdb) {
-               uint32 initial_val = sys_getpid();
-               tdb_change_int32_atomic(tdb, "INFO/random_seed", (int *)&initial_val, 1);
-               set_rand_reseed_data((unsigned char *)&initial_val, sizeof(initial_val));
+       /* searching for keys in secrets db -- way to go ... */
+       for (k = keys; k; k = k->next) {
+               char *secrets_key;
+               
+               /* important: ensure null-termination of the key string */
+               secrets_key = SMB_STRNDUP(k->node_key.dptr, k->node_key.dsize);
+               if (!secrets_key) {
+                       DEBUG(0, ("strndup failed!\n"));
+                       return NT_STATUS_NO_MEMORY;
+               }
+
+               packed_pass = secrets_fetch(secrets_key, &size);
+               packed_size = tdb_trusted_dom_pass_unpack(packed_pass, size, pass);
+               /* packed representation isn't needed anymore */
+               SAFE_FREE(packed_pass);
+               
+               if (size != packed_size) {
+                       DEBUG(2, ("Secrets record %s is invalid!\n", secrets_key));
+                       continue;
+               }
+               
+               pull_ucs2_fstring(dom_name, pass->uni_name);
+               DEBUG(18, ("Fetched secret record num %d.\nDomain name: %s, SID: %s\n",
+                          idx, dom_name, sid_string_static(&pass->domain_sid)));
+
+               SAFE_FREE(secrets_key);
+
+               if (idx >= start_idx && idx < start_idx + max_num_domains) {
+                       dom = TALLOC_ZERO_P(ctx, TRUSTDOM);
+                       if (!dom) {
+                               /* free returned tdb record */
+                               return NT_STATUS_NO_MEMORY;
+                       }
+                       
+                       /* copy domain sid */
+                       SMB_ASSERT(sizeof(dom->sid) == sizeof(pass->domain_sid));
+                       memcpy(&(dom->sid), &(pass->domain_sid), sizeof(dom->sid));
+                       
+                       /* copy unicode domain name */
+                       dom->name = talloc_strdup_w(ctx, pass->uni_name);
+                       
+                       (*domains)[idx - start_idx] = dom;
+                       
+                       DEBUG(18, ("Secret record is in required range.\n \
+                                  start_idx = %d, max_num_domains = %d. Added to returned array.\n",
+                                  start_idx, max_num_domains));
+
+                       *enum_ctx = idx + 1;
+                       (*num_domains)++;
+               
+                       /* set proper status code to return */
+                       if (k->next) {
+                               /* there are yet some entries to enumerate */
+                               status = STATUS_MORE_ENTRIES;
+                       } else {
+                               /* this is the last entry in the whole enumeration */
+                               status = NT_STATUS_OK;
+                       }
+               } else {
+                       DEBUG(18, ("Secret is outside the required range.\n \
+                                  start_idx = %d, max_num_domains = %d. Not added to returned array\n",
+                                  start_idx, max_num_domains));
+               }
+               
+               idx++;          
        }
+       
+       DEBUG(5, ("secrets_get_trusted_domains: got %d domains\n", *num_domains));
+
+       /* free the results of searching the keys */
+       tdb_search_list_free(keys);
+
+       return status;
+}
+
+/*******************************************************************************
+ Lock the secrets tdb based on a string - this is used as a primitive form of mutex
+ between smbd instances.
+*******************************************************************************/
+
+BOOL secrets_named_mutex(const char *name, unsigned int timeout)
+{
+       int ret = 0;
+
+       if (!message_init())
+               return False;
+
+       ret = tdb_lock_bystring(tdb, name, timeout);
+       if (ret == 0)
+               DEBUG(10,("secrets_named_mutex: got mutex for %s\n", name ));
 
+       return (ret == 0);
+}
+
+/*******************************************************************************
+ Unlock a named mutex.
+*******************************************************************************/
+
+void secrets_named_mutex_release(const char *name)
+{
+       tdb_unlock_bystring(tdb, name);
+       DEBUG(10,("secrets_named_mutex: released mutex for %s\n", name ));
+}
+
+/*********************************************************
+ Check to see if we must talk to the PDC to avoid sam 
+ sync delays
+ ********************************************************/
+BOOL must_use_pdc( const char *domain )
+{
+       time_t  now = time(NULL);
+       time_t  last_change_time;
+       unsigned char   passwd[16];   
+       
+       if ( !secrets_fetch_trust_account_password(domain, passwd, &last_change_time, NULL) )
+               return False;
+               
        /*
-        * Re-seed the random crypto generator, so all smbd's
-        * started from the same parent won't generate the same
-        * sequence.
+        * If the time the machine password has changed
+        * was less than about 15 minutes then we need to contact
+        * the PDC only, as we cannot be sure domain replication
+        * has yet taken place. Bug found by Gerald (way to go
+        * Gerald !). JRA.
         */
-       generate_random_buffer( &dummy, 1, True);
+        
+       if ( now - last_change_time < SAM_SYNC_WINDOW )
+               return True;
+               
+       return False;
+
 }
 
-BOOL secrets_store_ldap_pw(char* dn, char* pw)
+/*******************************************************************************
+ Store a complete AFS keyfile into secrets.tdb.
+*******************************************************************************/
+
+BOOL secrets_store_afs_keyfile(const char *cell, const struct afs_keyfile *keyfile)
 {
        fstring key;
-       char *p;
-       
-       pstrcpy(key, dn);
-       for (p=key; *p; p++)
-               if (*p == ',') *p = '/';
+
+       if ((cell == NULL) || (keyfile == NULL))
+               return False;
+
+       if (ntohl(keyfile->nkeys) > SECRETS_AFS_MAXKEYS)
+               return False;
+
+       slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
+       return secrets_store(key, keyfile, sizeof(struct afs_keyfile));
+}
+
+/*******************************************************************************
+ Fetch the current (highest) AFS key from secrets.tdb
+*******************************************************************************/
+BOOL secrets_fetch_afs_key(const char *cell, struct afs_key *result)
+{
+       fstring key;
+       struct afs_keyfile *keyfile;
+       size_t size;
+       uint32 i;
+
+       slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
+
+       keyfile = (struct afs_keyfile *)secrets_fetch(key, &size);
+
+       if (keyfile == NULL)
+               return False;
+
+       if (size != sizeof(struct afs_keyfile)) {
+               SAFE_FREE(keyfile);
+               return False;
+       }
+
+       i = ntohl(keyfile->nkeys);
+
+       if (i > SECRETS_AFS_MAXKEYS) {
+               SAFE_FREE(keyfile);
+               return False;
+       }
+
+       *result = keyfile->entry[i-1];
+
+       result->kvno = ntohl(result->kvno);
+
+       return True;
+}
+
+/******************************************************************************
+  When kerberos is not available, choose between anonymous or
+  authenticated connections.  
+
+  We need to use an authenticated connection if DCs have the
+  RestrictAnonymous registry entry set > 0, or the "Additional
+  restrictions for anonymous connections" set in the win2k Local
+  Security Policy.
+
+  Caller to free() result in domain, username, password
+*******************************************************************************/
+void secrets_fetch_ipc_userpass(char **username, char **domain, char **password)
+{
+       *username = secrets_fetch(SECRETS_AUTH_USER, NULL);
+       *domain = secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
+       *password = secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
        
-       return secrets_store(key, pw, strlen(pw));
+       if (*username && **username) {
+
+               if (!*domain || !**domain)
+                       *domain = smb_xstrdup(lp_workgroup());
+               
+               if (!*password || !**password)
+                       *password = smb_xstrdup("");
+
+               DEBUG(3, ("IPC$ connections done by user %s\\%s\n", 
+                         *domain, *username));
+
+       } else {
+               DEBUG(3, ("IPC$ connections done anonymously\n"));
+               *username = smb_xstrdup("");
+               *domain = smb_xstrdup("");
+               *password = smb_xstrdup("");
+       }
 }