diff options
Diffstat (limited to 'source4/passdb/passdb.c')
| -rw-r--r-- | source4/passdb/passdb.c | 1167 |
1 files changed, 1167 insertions, 0 deletions
diff --git a/source4/passdb/passdb.c b/source4/passdb/passdb.c new file mode 100644 index 0000000000..39e2d4cb22 --- /dev/null +++ b/source4/passdb/passdb.c @@ -0,0 +1,1167 @@ +/* + Unix SMB/CIFS implementation. + Password and authentication handling + Copyright (C) Jeremy Allison 1996-2001 + Copyright (C) Luke Kenneth Casson Leighton 1996-1998 + Copyright (C) Gerald (Jerry) Carter 2000-2001 + Copyright (C) Andrew Bartlett 2001-2002 + + 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" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_PASSDB + +/* + * This is set on startup - it defines the SID for this + * machine, and therefore the SAM database for which it is + * responsible. + */ + +/************************************************************ + Fill the SAM_ACCOUNT with default values. + ***********************************************************/ + +static void pdb_fill_default_sam(SAM_ACCOUNT *user) +{ + ZERO_STRUCT(user->private); /* Don't touch the talloc context */ + + /* no initial methods */ + user->methods = NULL; + + /* Don't change these timestamp settings without a good reason. + They are important for NT member server compatibility. */ + + user->private.uid = user->private.gid = -1; + + user->private.logon_time = (time_t)0; + user->private.pass_last_set_time = (time_t)0; + user->private.pass_can_change_time = (time_t)0; + user->private.logoff_time = + user->private.kickoff_time = + user->private.pass_must_change_time = get_time_t_max(); + user->private.unknown_3 = 0x00ffffff; /* don't know */ + user->private.logon_divs = 168; /* hours per week */ + user->private.hours_len = 21; /* 21 times 8 bits = 168 */ + memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */ + user->private.unknown_5 = 0x00000000; /* don't know */ + user->private.unknown_6 = 0x000004ec; /* don't know */ + + /* Some parts of samba strlen their pdb_get...() returns, + so this keeps the interface unchanged for now. */ + + user->private.username = ""; + user->private.domain = ""; + user->private.nt_username = ""; + user->private.full_name = ""; + user->private.home_dir = ""; + user->private.logon_script = ""; + user->private.profile_path = ""; + user->private.acct_desc = ""; + user->private.workstations = ""; + user->private.unknown_str = ""; + user->private.munged_dial = ""; + + user->private.plaintext_pw = NULL; + +} + +static void destroy_pdb_talloc(SAM_ACCOUNT **user) +{ + if (*user) { + data_blob_clear_free(&((*user)->private.lm_pw)); + data_blob_clear_free(&((*user)->private.nt_pw)); + + if((*user)->private.plaintext_pw!=NULL) + memset((*user)->private.plaintext_pw,'\0',strlen((*user)->private.plaintext_pw)); + talloc_destroy((*user)->mem_ctx); + *user = NULL; + } +} + + +/********************************************************************** + Alloc memory and initialises a struct sam_passwd on supplied mem_ctx. +***********************************************************************/ + +NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user) +{ + if (*user != NULL) { + DEBUG(0,("pdb_init_sam_talloc: SAM_ACCOUNT was non NULL\n")); +#if 0 + smb_panic("non-NULL pointer passed to pdb_init_sam\n"); +#endif + return NT_STATUS_UNSUCCESSFUL; + } + + if (!mem_ctx) { + DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n")); + return NT_STATUS_UNSUCCESSFUL; + } + + *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT)); + + if (*user==NULL) { + DEBUG(0,("pdb_init_sam_talloc: error while allocating memory\n")); + return NT_STATUS_NO_MEMORY; + } + + (*user)->mem_ctx = mem_ctx; + + (*user)->free_fn = NULL; + + pdb_fill_default_sam(*user); + + return NT_STATUS_OK; +} + + +/************************************************************* + Alloc memory and initialises a struct sam_passwd. + ************************************************************/ + +NTSTATUS pdb_init_sam(SAM_ACCOUNT **user) +{ + TALLOC_CTX *mem_ctx; + NTSTATUS nt_status; + + mem_ctx = talloc_init("passdb internal SAM_ACCOUNT allocation"); + + if (!mem_ctx) { + DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n")); + return NT_STATUS_NO_MEMORY; + } + + if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) { + talloc_destroy(mem_ctx); + return nt_status; + } + + (*user)->free_fn = destroy_pdb_talloc; + + return NT_STATUS_OK; +} + + +/************************************************************* + Initialises a struct sam_passwd with sane values. + ************************************************************/ + +NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd) +{ + GROUP_MAP map; + + const char *guest_account = lp_guestaccount(); + if (!(guest_account && *guest_account)) { + DEBUG(1, ("NULL guest account!?!?\n")); + return NT_STATUS_UNSUCCESSFUL; + } + + if (!pwd) { + return NT_STATUS_UNSUCCESSFUL; + } + + pdb_fill_default_sam(sam_account); + + pdb_set_username(sam_account, pwd->pw_name, PDB_SET); + pdb_set_fullname(sam_account, pwd->pw_gecos, PDB_SET); + + pdb_set_unix_homedir(sam_account, pwd->pw_dir, PDB_SET); + + pdb_set_domain (sam_account, lp_workgroup(), PDB_DEFAULT); + + pdb_set_uid(sam_account, pwd->pw_uid, PDB_SET); + pdb_set_gid(sam_account, pwd->pw_gid, PDB_SET); + + /* When we get a proper uid -> SID and SID -> uid allocation + mechinism, we should call it here. + + We can't just set this to 0 or allow it only to be filled + in when added to the backend, becouse the user's SID + may already be in security descriptors etc. + + -- abartlet 11-May-02 + */ + + + /* Ensure this *must* be set right */ + if (strcmp(pwd->pw_name, guest_account) == 0) { + if (!pdb_set_user_sid_from_rid(sam_account, DOMAIN_USER_RID_GUEST, PDB_DEFAULT)) { + return NT_STATUS_UNSUCCESSFUL; + } + if (!pdb_set_group_sid_from_rid(sam_account, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT)) { + return NT_STATUS_UNSUCCESSFUL; + } + } else { + + if (!pdb_set_user_sid_from_rid(sam_account, + fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) { + DEBUG(0,("Can't set User SID from RID!\n")); + return NT_STATUS_INVALID_PARAMETER; + } + + /* call the mapping code here */ + if(pdb_getgrgid(&map, pwd->pw_gid, MAPPING_WITHOUT_PRIV)) { + if (!pdb_set_group_sid(sam_account,&map.sid, PDB_SET)){ + DEBUG(0,("Can't set Group SID!\n")); + return NT_STATUS_INVALID_PARAMETER; + } + } + else { + if (!pdb_set_group_sid_from_rid(sam_account,pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) { + DEBUG(0,("Can't set Group SID\n")); + return NT_STATUS_INVALID_PARAMETER; + } + } + } + + /* check if this is a user account or a machine account */ + if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$') + { + pdb_set_profile_path(sam_account, + talloc_sub_specified((sam_account)->mem_ctx, + lp_logon_path(), + pwd->pw_name, lp_netbios_name(), + pwd->pw_uid, pwd->pw_gid), + PDB_DEFAULT); + + pdb_set_homedir(sam_account, + talloc_sub_specified((sam_account)->mem_ctx, + lp_logon_home(), + pwd->pw_name, lp_netbios_name(), + pwd->pw_uid, pwd->pw_gid), + PDB_DEFAULT); + + pdb_set_dir_drive(sam_account, + talloc_sub_specified((sam_account)->mem_ctx, + lp_logon_drive(), + pwd->pw_name, lp_netbios_name(), + pwd->pw_uid, pwd->pw_gid), + PDB_DEFAULT); + + pdb_set_logon_script(sam_account, + talloc_sub_specified((sam_account)->mem_ctx, + lp_logon_script(), + pwd->pw_name, lp_netbios_name(), + pwd->pw_uid, pwd->pw_gid), + PDB_DEFAULT); + if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT)) { + DEBUG(1, ("Failed to set 'normal account' flags for user %s.\n", pwd->pw_name)); + return NT_STATUS_UNSUCCESSFUL; + } + } else { + if (!pdb_set_acct_ctrl(sam_account, ACB_WSTRUST, PDB_DEFAULT)) { + DEBUG(1, ("Failed to set 'trusted workstation account' flags for user %s.\n", pwd->pw_name)); + return NT_STATUS_UNSUCCESSFUL; + } + } + return NT_STATUS_OK; +} + + +/************************************************************* + Initialises a struct sam_passwd with sane values. + ************************************************************/ + +NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd) +{ + NTSTATUS nt_status; + + if (!pwd) { + new_sam_acct = NULL; + return NT_STATUS_INVALID_PARAMETER; + } + + if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) { + new_sam_acct = NULL; + return nt_status; + } + + if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) { + pdb_free_sam(new_sam_acct); + new_sam_acct = NULL; + return nt_status; + } + + return NT_STATUS_OK; +} + + +/** + * Free the contets of the SAM_ACCOUNT, but not the structure. + * + * Also wipes the LM and NT hashes and plaintext password from + * memory. + * + * @param user SAM_ACCOUNT to free members of. + **/ + +static void pdb_free_sam_contents(SAM_ACCOUNT *user) +{ + + /* Kill off sensitive data. Free()ed by the + talloc mechinism */ + + data_blob_clear_free(&(user->private.lm_pw)); + data_blob_clear_free(&(user->private.nt_pw)); + if (user->private.plaintext_pw!=NULL) + memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw)); +} + + +/************************************************************ + Reset the SAM_ACCOUNT and free the NT/LM hashes. + ***********************************************************/ + +NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user) +{ + if (user == NULL) { + DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n")); +#if 0 + smb_panic("NULL pointer passed to pdb_free_sam\n"); +#endif + return NT_STATUS_UNSUCCESSFUL; + } + + pdb_free_sam_contents(user); + + pdb_fill_default_sam(user); + + return NT_STATUS_OK; +} + + +/************************************************************ + Free the SAM_ACCOUNT and the member pointers. + ***********************************************************/ + +NTSTATUS pdb_free_sam(SAM_ACCOUNT **user) +{ + if (*user == NULL) { + DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n")); +#if 0 + smb_panic("NULL pointer passed to pdb_free_sam\n"); +#endif + return NT_STATUS_UNSUCCESSFUL; + } + + pdb_free_sam_contents(*user); + + if ((*user)->free_fn) { + (*user)->free_fn(user); + } + + return NT_STATUS_OK; +} + + +/********************************************************** + Encode the account control bits into a string. + length = length of string to encode into (including terminating + null). length *MUST BE MORE THAN 2* ! + **********************************************************/ + +char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length) +{ + static fstring acct_str; + size_t i = 0; + + acct_str[i++] = '['; + + if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N'; + if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D'; + if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H'; + if (acct_ctrl & ACB_TEMPDUP ) acct_str[i++] = 'T'; + if (acct_ctrl & ACB_NORMAL ) acct_str[i++] = 'U'; + if (acct_ctrl & ACB_MNS ) acct_str[i++] = 'M'; + if (acct_ctrl & ACB_WSTRUST ) acct_str[i++] = 'W'; + if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S'; + if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L'; + if (acct_ctrl & ACB_PWNOEXP ) acct_str[i++] = 'X'; + if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I'; + + for ( ; i < length - 2 ; i++ ) + acct_str[i] = ' '; + + i = length - 2; + acct_str[i++] = ']'; + acct_str[i++] = '\0'; + + return acct_str; +} + +/********************************************************** + Decode the account control bits from a string. + **********************************************************/ + +uint16 pdb_decode_acct_ctrl(const char *p) +{ + uint16 acct_ctrl = 0; + BOOL finished = False; + + /* + * Check if the account type bits have been encoded after the + * NT password (in the form [NDHTUWSLXI]). + */ + + if (*p != '[') + return 0; + + for (p++; *p && !finished; p++) { + switch (*p) { + case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ } + case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ } + case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ } + case 'T': { acct_ctrl |= ACB_TEMPDUP ; break; /* 'T'emp account. */ } + case 'U': { acct_ctrl |= ACB_NORMAL ; break; /* 'U'ser account (normal). */ } + case 'M': { acct_ctrl |= ACB_MNS ; break; /* 'M'NS logon user account. What is this ? */ } + case 'W': { acct_ctrl |= ACB_WSTRUST ; break; /* 'W'orkstation account. */ } + case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ } + case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ } + case 'X': { acct_ctrl |= ACB_PWNOEXP ; break; /* No 'X'piry on password */ } + case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ } + case ' ': { break; } + case ':': + case '\n': + case '\0': + case ']': + default: { finished = True; } + } + } + + return acct_ctrl; +} + +/************************************************************* + Routine to set 32 hex password characters from a 16 byte array. +**************************************************************/ + +void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl) +{ + if (pwd != NULL) { + int i; + for (i = 0; i < 16; i++) + slprintf(&p[i*2], 3, "%02X", pwd[i]); + } else { + if (acct_ctrl & ACB_PWNOTREQ) + safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33); + else + safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33); + } +} + +/************************************************************* + Routine to get the 32 hex characters and turn them + into a 16 byte array. +**************************************************************/ + +BOOL pdb_gethexpwd(const char *p, unsigned char *pwd) +{ + int i; + unsigned char lonybble, hinybble; + const char *hexchars = "0123456789ABCDEF"; + char *p1, *p2; + + if (!p) + return (False); + + for (i = 0; i < 32; i += 2) { + hinybble = toupper(p[i]); + lonybble = toupper(p[i + 1]); + + p1 = strchr(hexchars, hinybble); + p2 = strchr(hexchars, lonybble); + + if (!p1 || !p2) + return (False); + + hinybble = PTR_DIFF(p1, hexchars); + lonybble = PTR_DIFF(p2, hexchars); + + pwd[i / 2] = (hinybble << 4) | lonybble; + } + return (True); +} + +/******************************************************************* + Converts NT user RID to a UNIX uid. + ********************************************************************/ + +static int algorithmic_rid_base(void) +{ + static int rid_offset = 0; + + if (rid_offset != 0) + return rid_offset; + + rid_offset = lp_algorithmic_rid_base(); + + if (rid_offset < BASE_RID) { + /* Try to prevent admin foot-shooting, we can't put algorithmic + rids below 1000, that's the 'well known RIDs' on NT */ + DEBUG(0, ("'algorithmic rid base' must be equal to or above %ld\n", BASE_RID)); + rid_offset = BASE_RID; + } + if (rid_offset & 1) { + DEBUG(0, ("algorithmic rid base must be even\n")); + rid_offset += 1; + } + return rid_offset; +} + + +uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid) +{ + int rid_offset = algorithmic_rid_base(); + return (uid_t)(((user_rid & (~USER_RID_TYPE))- rid_offset)/RID_MULTIPLIER); +} + + +/******************************************************************* + converts UNIX uid to an NT User RID. + ********************************************************************/ + +uint32 fallback_pdb_uid_to_user_rid(uid_t uid) +{ + int rid_offset = algorithmic_rid_base(); + return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE); +} + +/******************************************************************* + Converts NT group RID to a UNIX gid. + ********************************************************************/ + +gid_t pdb_group_rid_to_gid(uint32 group_rid) +{ + int rid_offset = algorithmic_rid_base(); + return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER); +} + +/******************************************************************* + converts NT Group RID to a UNIX uid. + + warning: you must not call that function only + you must do a call to the group mapping first. + there is not anymore a direct link between the gid and the rid. + ********************************************************************/ + +uint32 pdb_gid_to_group_rid(gid_t gid) +{ + int rid_offset = algorithmic_rid_base(); + return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE); +} + +/******************************************************************* + Decides if a RID is a well known RID. + ********************************************************************/ + +static BOOL pdb_rid_is_well_known(uint32 rid) +{ + /* Not using rid_offset here, becouse this is the actual + NT fixed value (1000) */ + + return (rid < BASE_RID); +} + +/******************************************************************* + Decides if a RID is a user or group RID. + ********************************************************************/ + +BOOL pdb_rid_is_user(uint32 rid) +{ + /* lkcl i understand that NT attaches an enumeration to a RID + * such that it can be identified as either a user, group etc + * type. there are 5 such categories, and they are documented. + */ + /* However, they are not in the RID, just somthing you can query + seperatly. Sorry luke :-) */ + + if(pdb_rid_is_well_known(rid)) { + /* + * The only well known user RIDs are DOMAIN_USER_RID_ADMIN + * and DOMAIN_USER_RID_GUEST. + */ + if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST) + return True; + } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) { + return True; + } + return False; +} + +/******************************************************************* + Convert a rid into a name. Used in the lookup SID rpc. + ********************************************************************/ + +BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use) +{ + uint32 rid; + SAM_ACCOUNT *sam_account = NULL; + GROUP_MAP map; + TALLOC_CTX *mem_ctx; + + mem_ctx = talloc_init("local_lookup_sid"); + if (!mem_ctx) { + DEBUG(0,("local_sid_to_gid: No memory\n")); + return False; + } + if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){ + DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n", + sid_string_talloc(mem_ctx, &map.sid))); + return False; + } + talloc_destroy(mem_ctx); + *psid_name_use = SID_NAME_UNKNOWN; + + DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid)); + + if (rid == DOMAIN_USER_RID_ADMIN) { + const char **admin_list = lp_admin_users(-1); + *psid_name_use = SID_NAME_USER; + if (admin_list) { + const char *p = *admin_list; + if(!next_token(&p, name, NULL, sizeof(fstring))) + fstrcpy(name, "Administrator"); + } else { + fstrcpy(name, "Administrator"); + } + return True; + } + + /* + * Don't try to convert the rid to a name if + * running in appliance mode + */ + + if (lp_hide_local_users()) + return False; + + if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) { + return False; + } + + /* This now does the 'generic' mapping in pdb_unix */ + /* 'guest' is also handled there */ + if (pdb_getsampwsid(sam_account, sid)) { + fstrcpy(name, pdb_get_username(sam_account)); + *psid_name_use = SID_NAME_USER; + + pdb_free_sam(&sam_account); + + return True; + } + + pdb_free_sam(&sam_account); + + if (pdb_getgrsid(&map, *sid, MAPPING_WITHOUT_PRIV)) { + if (map.gid!=(gid_t)-1) { + DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid)); + } else { + DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid. Returning name.\n", map.nt_name)); + } + + fstrcpy(name, map.nt_name); + *psid_name_use = map.sid_name_use; + return True; + } + + if (pdb_rid_is_user(rid)) { + uid_t uid; + + DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid)); + + uid = fallback_pdb_user_rid_to_uid(rid); + slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid); + + return False; /* Indicates that this user was 'not mapped' */ + } else { + gid_t gid; + struct group *gr; + + DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid)); + + gid = pdb_group_rid_to_gid(rid); + gr = getgrgid(gid); + + *psid_name_use = SID_NAME_ALIAS; + + DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid, + gr ? "succeeded" : "failed" )); + + if(!gr) { + slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid); + return False; /* Indicates that this group was 'not mapped' */ + } + + fstrcpy( name, gr->gr_name); + + DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name, + (unsigned int)rid )); + return True; + } +} + +/******************************************************************* + Convert a name into a SID. Used in the lookup name rpc. + ********************************************************************/ + +BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use) +{ + extern DOM_SID global_sid_World_Domain; + DOM_SID local_sid; + fstring user; + SAM_ACCOUNT *sam_account = NULL; + struct group *grp; + GROUP_MAP map; + + *psid_name_use = SID_NAME_UNKNOWN; + + /* + * user may be quoted a const string, and map_username and + * friends can modify it. Make a modifiable copy. JRA. + */ + + fstrcpy(user, c_user); + + sid_copy(&local_sid, get_global_sam_sid()); + + /* + * Special case for MACHINE\Everyone. Map to the world_sid. + */ + + if(strequal(user, "Everyone")) { + sid_copy( psid, &global_sid_World_Domain); + sid_append_rid(psid, 0); + *psid_name_use = SID_NAME_ALIAS; + return True; + } + + /* + * Don't lookup local unix users if running in appliance mode + */ + if (lp_hide_local_users()) + return False; + + if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) { + return False; + } + + if (pdb_getsampwnam(sam_account, user)) { + sid_copy(psid, pdb_get_user_sid(sam_account)); + *psid_name_use = SID_NAME_USER; + + pdb_free_sam(&sam_account); + return True; + } + + pdb_free_sam(&sam_account); + + /* + * Maybe it was a group ? + */ + + /* check if it's a mapped group */ + if (pdb_getgrnam(&map, user, MAPPING_WITHOUT_PRIV)) { + /* yes it's a mapped group */ + sid_copy(&local_sid, &map.sid); + *psid_name_use = map.sid_name_use; + } else { + /* it's not a mapped group */ + grp = getgrnam(user); + if(!grp) + return False; + + /* + *check if it's mapped, if it is reply it doesn't exist + * + * that's to prevent this case: + * + * unix group ug is mapped to nt group ng + * someone does a lookup on ug + * we must not reply as it doesn't "exist" anymore + * for NT. For NT only ng exists. + * JFM, 30/11/2001 + */ + + if (pdb_getgrgid(&map, grp->gr_gid, MAPPING_WITHOUT_PRIV)){ + return False; + } + + sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid)); + *psid_name_use = SID_NAME_ALIAS; + } + + sid_copy( psid, &local_sid); + + return True; +} + +/**************************************************************************** + Convert a uid to SID - locally. +****************************************************************************/ + +DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid) +{ + struct passwd *pass; + SAM_ACCOUNT *sam_user = NULL; + fstring str; /* sid string buffer */ + + sid_copy(psid, get_global_sam_sid()); + + if((pass = getpwuid_alloc(uid))) { + + if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) { + passwd_free(&pass); + return NULL; + } + + if (pdb_getsampwnam(sam_user, pass->pw_name)) { + sid_copy(psid, pdb_get_user_sid(sam_user)); + } else { + sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid)); + } + + DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (%s).\n", + (unsigned)uid, sid_to_string( str, psid), + pass->pw_name )); + + passwd_free(&pass); + pdb_free_sam(&sam_user); + + } else { + sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid)); + + DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (unknown user).\n", + (unsigned)uid, sid_to_string( str, psid))); + } + + return psid; +} + +/**************************************************************************** + Convert a SID to uid - locally. +****************************************************************************/ + +BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type) +{ + fstring str; + SAM_ACCOUNT *sam_user = NULL; + + *name_type = SID_NAME_UNKNOWN; + + if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) + return False; + + if (pdb_getsampwsid(sam_user, psid)) { + + if (!IS_SAM_SET(sam_user,PDB_UID)&&!IS_SAM_CHANGED(sam_user,PDB_UID)) { + pdb_free_sam(&sam_user); + return False; + } + + *puid = pdb_get_uid(sam_user); + + DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid), + (unsigned int)*puid, pdb_get_username(sam_user))); + pdb_free_sam(&sam_user); + } else { + + DOM_SID dom_sid; + uint32 rid; + GROUP_MAP map; + + pdb_free_sam(&sam_user); + + if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) { + DEBUG(3, ("local_sid_to_uid: SID '%s' is a group, not a user... \n", sid_to_string(str, psid))); + /* It's a group, not a user... */ + return False; + } + + sid_copy(&dom_sid, psid); + if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) { + DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid))); + return False; + } + + if (!pdb_rid_is_user(rid)) { + DEBUG(3, ("local_sid_to_uid: sid '%s' cannot be mapped to a uid algorithmicly becouse it is a group\n", sid_to_string(str, psid))); + return False; + } + + *puid = fallback_pdb_user_rid_to_uid(rid); + + DEBUG(5,("local_sid_to_uid: SID %s algorithmicly mapped to %ld mapped becouse SID was not found in passdb.\n", + sid_to_string(str, psid), (signed long int)(*puid))); + } + + *name_type = SID_NAME_USER; + + return True; +} + +/**************************************************************************** + Convert a gid to SID - locally. +****************************************************************************/ + +DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid) +{ + GROUP_MAP map; + + sid_copy(psid, get_global_sam_sid()); + + if (pdb_getgrgid(&map, gid, MAPPING_WITHOUT_PRIV)) { + sid_copy(psid, &map.sid); + } + else { + sid_append_rid(psid, pdb_gid_to_group_rid(gid)); + } + + return psid; +} + +/**************************************************************************** + Convert a SID to gid - locally. +****************************************************************************/ + +BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type) +{ + fstring str; + GROUP_MAP map; + + *name_type = SID_NAME_UNKNOWN; + + /* + * We can only convert to a gid if this is our local + * Domain SID (ie. we are the controling authority). + * + * Or in the Builtin SID too. JFM, 11/30/2001 + */ + + if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) { + + /* the SID is in the mapping table but not mapped */ + if (map.gid==(gid_t)-1) + return False; + + *pgid = map.gid; + *name_type = map.sid_name_use; + DEBUG(10,("local_sid_to_gid: mapped SID %s (%s) -> gid (%u).\n", + sid_to_string( str, psid), + map.nt_name, (unsigned int)*pgid)); + + } else { + uint32 rid; + SAM_ACCOUNT *sam_user = NULL; + if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) + return False; + + if (pdb_getsampwsid(sam_user, psid)) { + return False; + pdb_free_sam(&sam_user); + } + + pdb_free_sam(&sam_user); + + if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) { + DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid))); + return False; + } + + if (pdb_rid_is_user(rid)) + return False; + + *pgid = pdb_group_rid_to_gid(rid); + *name_type = SID_NAME_ALIAS; + DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u).\n", sid_to_string( str, psid), + (unsigned int)*pgid)); + } + + return True; +} + +/************************************************************* + Change a password entry in the local smbpasswd file. + +It is currently being called by SWAT and by smbpasswd. + + --jerry + *************************************************************/ + +BOOL local_password_change(const char *user_name, int local_flags, + const char *new_passwd, + char *err_str, size_t err_str_len, + char *msg_str, size_t msg_str_len) +{ + struct passwd *pwd = NULL; + SAM_ACCOUNT *sam_pass=NULL; + uint16 other_acb; + + *err_str = '\0'; + *msg_str = '\0'; + + /* Get the smb passwd entry for this user */ + pdb_init_sam(&sam_pass); + if(!pdb_getsampwnam(sam_pass, user_name)) { + pdb_free_sam(&sam_pass); + + if (local_flags & LOCAL_ADD_USER) { + pwd = getpwnam_alloc(user_name); + } else if (local_flags & LOCAL_DELETE_USER) { + /* Might not exist in /etc/passwd */ + } else { + slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name); + return False; + } + + if (pwd) { + /* Local user found, so init from this */ + if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){ + slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name); + passwd_free(&pwd); + return False; + } + + passwd_free(&pwd); + } else { + if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){ + slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name); + return False; + } + + if (!pdb_set_username(sam_pass, user_name, PDB_CHANGED)) { + slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } + } else { + /* the entry already existed */ + local_flags &= ~LOCAL_ADD_USER; + } + + /* the 'other' acb bits not being changed here */ + other_acb = (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL))); + if (local_flags & LOCAL_TRUST_ACCOUNT) { + if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) { + slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) { + if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) { + slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } else { + if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) { + slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } + + /* + * We are root - just write the new password + * and the valid last change time. + */ + + if (local_flags & LOCAL_DISABLE_USER) { + if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) { + slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } else if (local_flags & LOCAL_ENABLE_USER) { + if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) { + slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } + + if (local_flags & LOCAL_SET_NO_PASSWORD) { + if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) { + slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } else if (local_flags & LOCAL_SET_PASSWORD) { + /* + * If we're dealing with setting a completely empty user account + * ie. One with a password of 'XXXX', but not set disabled (like + * an account created from scratch) then if the old password was + * 'XX's then getsmbpwent will have set the ACB_DISABLED flag. + * We remove that as we're giving this user their first password + * and the decision hasn't really been made to disable them (ie. + * don't create them disabled). JRA. + */ + if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) { + if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) { + slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } + if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) { + slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + + if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) { + slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } + + if (local_flags & LOCAL_ADD_USER) { + if (pdb_add_sam_account(sam_pass)) { + slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return True; + } else { + slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + } else if (local_flags & LOCAL_DELETE_USER) { + if (!pdb_delete_sam_account(sam_pass)) { + slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name); + } else { + if(!pdb_update_sam_account(sam_pass)) { + slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name); + pdb_free_sam(&sam_pass); + return False; + } + if(local_flags & LOCAL_DISABLE_USER) + slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name); + else if (local_flags & LOCAL_ENABLE_USER) + slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name); + else if (local_flags & LOCAL_SET_NO_PASSWORD) + slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name); + } + + pdb_free_sam(&sam_pass); + return True; +} |