/* Unix SMB/CIFS implementation. Samba utility functions Copyright (C) Andrew Tridgell 1992-1998 Copyright (C) Luke Kenneth Caseson Leighton 1998-1999 Copyright (C) Jeremy Allison 1999 Copyright (C) Stefan (metze) Metzmacher 2002 Copyright (C) Simo Sorce 2002 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2005 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" /* * Some useful sids, more well known sids can be found at * http://support.microsoft.com/kb/243330/EN-US/ */ const DOM_SID global_sid_World_Domain = /* Everyone domain */ { 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_World = /* Everyone */ { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Creator_Owner_Domain = /* Creator Owner domain */ { 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_NT_Authority = /* NT Authority */ { 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_System = /* System */ { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_NULL = /* NULL sid */ { 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Authenticated_Users = /* All authenticated rids */ { 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; #if 0 /* for documentation */ const DOM_SID global_sid_Restriced = /* Restriced Code */ { 1, 1, {0,0,0,0,0,5}, {12,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; #endif const DOM_SID global_sid_Network = /* Network rids */ { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Creator_Owner = /* Creator Owner */ { 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Creator_Group = /* Creator Group */ { 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Anonymous = /* Anonymous login */ { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin = /* Local well-known domain */ { 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Administrators = /* Builtin administrators */ { 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Users = /* Builtin users */ { 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Guests = /* Builtin guest users */ { 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Power_Users = /* Builtin power users */ { 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Account_Operators = /* Builtin account operators */ { 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Server_Operators = /* Builtin server operators */ { 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Print_Operators = /* Builtin print operators */ { 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Backup_Operators = /* Builtin backup operators */ { 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_Replicator = /* Builtin replicator */ { 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Builtin_PreWin2kAccess = /* Builtin pre win2k access */ { 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Unix_Users = /* Unmapped Unix users */ { 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; const DOM_SID global_sid_Unix_Groups = /* Unmapped Unix groups */ { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}; /* Unused, left here for documentary purposes */ #if 0 #define SECURITY_NULL_SID_AUTHORITY 0 #define SECURITY_WORLD_SID_AUTHORITY 1 #define SECURITY_LOCAL_SID_AUTHORITY 2 #define SECURITY_CREATOR_SID_AUTHORITY 3 #define SECURITY_NT_AUTHORITY 5 #endif /* * An NT compatible anonymous token. */ static DOM_SID anon_sid_array[3] = { { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}, { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}, { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} }; NT_USER_TOKEN anonymous_token = { 3, anon_sid_array, SE_NONE }; static DOM_SID system_sid_array[1] = { { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} }; NT_USER_TOKEN system_token = { 1, system_sid_array, SE_ALL_PRIVS }; /**************************************************************************** Lookup string names for SID types. ****************************************************************************/ static const struct { enum lsa_SidType sid_type; const char *string; } sid_name_type[] = { {SID_NAME_USER, "User"}, {SID_NAME_DOM_GRP, "Domain Group"}, {SID_NAME_DOMAIN, "Domain"}, {SID_NAME_ALIAS, "Local Group"}, {SID_NAME_WKN_GRP, "Well-known Group"}, {SID_NAME_DELETED, "Deleted Account"}, {SID_NAME_INVALID, "Invalid Account"}, {SID_NAME_UNKNOWN, "UNKNOWN"}, {SID_NAME_COMPUTER, "Computer"}, {(enum lsa_SidType)0, NULL} }; const char *sid_type_lookup(uint32 sid_type) { int i = 0; /* Look through list */ while(sid_name_type[i].sid_type != 0) { if (sid_name_type[i].sid_type == sid_type) return sid_name_type[i].string; i++; } /* Default return */ return "SID *TYPE* is INVALID"; } /************************************************************************** Create the SYSTEM token. ***************************************************************************/ NT_USER_TOKEN *get_system_token(void) { return &system_token; } /****************************************************************** get the default domain/netbios name to be used when dealing with our passdb list of accounts ******************************************************************/ const char *get_global_sam_name(void) { if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) { return lp_workgroup(); } return global_myname(); } /***************************************************************** Convert a SID to an ascii string. *****************************************************************/ char *sid_to_fstring(fstring sidstr_out, const DOM_SID *sid) { char *str = sid_string_talloc(talloc_tos(), sid); fstrcpy(sidstr_out, str); TALLOC_FREE(str); return sidstr_out; } /***************************************************************** Essentially a renamed dom_sid_string from librpc/ndr with a panic if it didn't work This introduces a dependency on librpc/ndr/sid.o which can easily be turned around if necessary *****************************************************************/ char *sid_string_talloc(TALLOC_CTX *mem_ctx, const DOM_SID *sid) { char *result = dom_sid_string(mem_ctx, sid); SMB_ASSERT(result != NULL); return result; } /***************************************************************** Useful function for debug lines. *****************************************************************/ char *sid_string_dbg(const DOM_SID *sid) { return sid_string_talloc(debug_ctx(), sid); } /***************************************************************** Use with care! *****************************************************************/ char *sid_string_tos(const DOM_SID *sid) { return sid_string_talloc(talloc_tos(), sid); } /***************************************************************** Convert a string to a SID. Returns True on success, False on fail. *****************************************************************/ bool string_to_sid(DOM_SID *sidout, const char *sidstr) { const char *p; char *q; /* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */ uint32 conv; if ((sidstr[0] != 'S' && sidstr[0] != 's') || sidstr[1] != '-') { DEBUG(3,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr)); return False; } ZERO_STRUCTP(sidout); /* Get the revision number. */ p = sidstr + 2; conv = (uint32) strtoul(p, &q, 10); if (!q || (*q != '-')) { DEBUG(3,("string_to_sid: Sid %s is not in a valid format.\n", sidstr)); return False; } sidout->sid_rev_num = (uint8) conv; q++; /* get identauth */ conv = (uint32) strtoul(q, &q, 10); if (!q || (*q != '-')) { DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr)); return False; } /* identauth in decimal should be < 2^32 */ /* NOTE - the conv value is in big-endian format. */ sidout->id_auth[0] = 0; sidout->id_auth[1] = 0; sidout->id_auth[2] = (conv & 0xff000000) >> 24; sidout->id_auth[3] = (conv & 0x00ff0000) >> 16; sidout->id_auth[4] = (conv & 0x0000ff00) >> 8; sidout->id_auth[5] = (conv & 0x000000ff); q++; sidout->num_auths = 0; for(conv = (uint32) strtoul(q, &q, 10); q && (*q =='-' || *q =='\0') && (sidout->num_auths < MAXSUBAUTHS); conv = (uint32) strtoul(q, &q, 10)) { sid_append_rid(sidout, conv); if (*q == '\0') break; q++; } return True; } DOM_SID *string_sid_talloc(TALLOC_CTX *mem_ctx, const char *sidstr) { DOM_SID *result = TALLOC_P(mem_ctx, DOM_SID); if (result == NULL) return NULL; if (!string_to_sid(result, sidstr)) return NULL; return result; } /***************************************************************** Add a rid to the end of a sid *****************************************************************/ bool sid_append_rid(DOM_SID *sid, uint32 rid) { if (sid->num_auths < MAXSUBAUTHS) { sid->sub_auths[sid->num_auths++] = rid; return True; } return False; } bool sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 rid) { sid_copy(dst, domain_sid); return sid_append_rid(dst, rid); } /***************************************************************** Removes the last rid from the end of a sid *****************************************************************/ bool sid_split_rid(DOM_SID *sid, uint32 *rid) { if (sid->num_auths > 0) { sid->num_auths--; *rid = sid->sub_auths[sid->num_auths]; return True; } return False; } /***************************************************************** Return the last rid from the end of a sid *****************************************************************/ bool sid_peek_rid(const DOM_SID *sid, uint32 *rid) { if (!sid || !rid) return False; if (sid->num_auths > 0) { *rid = sid->sub_auths[sid->num_auths - 1]; return True; } return False; } /***************************************************************** Return the last rid from the end of a sid and check the sid against the exp_dom_sid *****************************************************************/ bool sid_peek_check_rid(const DOM_SID *exp_dom_sid, const DOM_SID *sid, uint32 *rid) { if (!exp_dom_sid || !sid || !rid) return False; if (sid->num_auths != (exp_dom_sid->num_auths+1)) { return False; } if (sid_compare_domain(exp_dom_sid, sid)!=0){ *rid=(-1); return False; } return sid_peek_rid(sid, rid); } /***************************************************************** Copies a sid *****************************************************************/ void sid_copy(DOM_SID *dst, const DOM_SID *src) { int i; ZERO_STRUCTP(dst); dst->sid_rev_num = src->sid_rev_num; dst->num_auths = src->num_auths; memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth)); for (i = 0; i < src->num_auths; i++) dst->sub_auths[i] = src->sub_auths[i]; } /***************************************************************** Write a sid out into on-the-wire format. *****************************************************************/ bool sid_linearize(char *outbuf, size_t len, const DOM_SID *sid) { size_t i; if (len < ndr_size_dom_sid(sid, NULL, 0)) return False; SCVAL(outbuf,0,sid->sid_rev_num); SCVAL(outbuf,1,sid->num_auths); memcpy(&outbuf[2], sid->id_auth, 6); for(i = 0; i < sid->num_auths; i++) SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]); return True; } /***************************************************************** Parse a on-the-wire SID to a DOM_SID. *****************************************************************/ bool sid_parse(const char *inbuf, size_t len, DOM_SID *sid) { int i; if (len < 8) return False; ZERO_STRUCTP(sid); sid->sid_rev_num = CVAL(inbuf, 0); sid->num_auths = CVAL(inbuf, 1); memcpy(sid->id_auth, inbuf+2, 6); if (len < 8 + sid->num_auths*4) return False; for (i=0;i<sid->num_auths;i++) sid->sub_auths[i] = IVAL(inbuf, 8+i*4); return True; } /***************************************************************** Compare the auth portion of two sids. *****************************************************************/ static int sid_compare_auth(const DOM_SID *sid1, const DOM_SID *sid2) { int i; if (sid1 == sid2) return 0; if (!sid1) return -1; if (!sid2) return 1; if (sid1->sid_rev_num != sid2->sid_rev_num) return sid1->sid_rev_num - sid2->sid_rev_num; for (i = 0; i < 6; i++) if (sid1->id_auth[i] != sid2->id_auth[i]) return sid1->id_auth[i] - sid2->id_auth[i]; return 0; } /***************************************************************** Compare two sids. *****************************************************************/ int sid_compare(const DOM_SID *sid1, const DOM_SID *sid2) { int i; if (sid1 == sid2) return 0; if (!sid1) return -1; if (!sid2) return 1; /* Compare most likely different rids, first: i.e start at end */ if (sid1->num_auths != sid2->num_auths) return sid1->num_auths - sid2->num_auths; for (i = sid1->num_auths-1; i >= 0; --i) if (sid1->sub_auths[i] != sid2->sub_auths[i]) return sid1->sub_auths[i] - sid2->sub_auths[i]; return sid_compare_auth(sid1, sid2); } /***************************************************************** See if 2 SIDs are in the same domain this just compares the leading sub-auths *****************************************************************/ int sid_compare_domain(const DOM_SID *sid1, const DOM_SID *sid2) { int n, i; n = MIN(sid1->num_auths, sid2->num_auths); for (i = n-1; i >= 0; --i) if (sid1->sub_auths[i] != sid2->sub_auths[i]) return sid1->sub_auths[i] - sid2->sub_auths[i]; return sid_compare_auth(sid1, sid2); } /***************************************************************** Compare two sids. *****************************************************************/ bool sid_equal(const DOM_SID *sid1, const DOM_SID *sid2) { return sid_compare(sid1, sid2) == 0; } /***************************************************************** Returns true if SID is internal (and non-mappable). *****************************************************************/ bool non_mappable_sid(DOM_SID *sid) { DOM_SID dom; uint32 rid; sid_copy(&dom, sid); sid_split_rid(&dom, &rid); if (sid_equal(&dom, &global_sid_Builtin)) return True; if (sid_equal(&dom, &global_sid_NT_Authority)) return True; return False; } /***************************************************************** Return the binary string representation of a DOM_SID. Caller must free. *****************************************************************/ char *sid_binstring(const DOM_SID *sid) { char *buf, *s; int len = ndr_size_dom_sid(sid, NULL, 0); buf = (char *)SMB_MALLOC(len); if (!buf) return NULL; sid_linearize(buf, len, sid); s = binary_string_rfc2254(buf, len); free(buf); return s; } /***************************************************************** Return the binary string representation of a DOM_SID. Caller must free. *****************************************************************/ char *sid_binstring_hex(const DOM_SID *sid) { char *buf, *s; int len = ndr_size_dom_sid(sid, NULL, 0); buf = (char *)SMB_MALLOC(len); if (!buf) return NULL; sid_linearize(buf, len, sid); s = binary_string(buf, len); free(buf); return s; } /******************************************************************* Tallocs a duplicate SID. ********************************************************************/ DOM_SID *sid_dup_talloc(TALLOC_CTX *ctx, const DOM_SID *src) { DOM_SID *dst; if(!src) return NULL; if((dst = TALLOC_ZERO_P(ctx, DOM_SID)) != NULL) { sid_copy( dst, src); } return dst; } /******************************************************************** Add SID to an array SIDs ********************************************************************/ NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const DOM_SID *sid, DOM_SID **sids, size_t *num) { *sids = TALLOC_REALLOC_ARRAY(mem_ctx, *sids, DOM_SID, (*num)+1); if (*sids == NULL) { *num = 0; return NT_STATUS_NO_MEMORY; } sid_copy(&((*sids)[*num]), sid); *num += 1; return NT_STATUS_OK; } /******************************************************************** Add SID to an array SIDs ensuring that it is not already there ********************************************************************/ NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const DOM_SID *sid, DOM_SID **sids, size_t *num_sids) { size_t i; for (i=0; i<(*num_sids); i++) { if (sid_compare(sid, &(*sids)[i]) == 0) return NT_STATUS_OK; } return add_sid_to_array(mem_ctx, sid, sids, num_sids); } /******************************************************************** Remove SID from an array ********************************************************************/ void del_sid_from_array(const DOM_SID *sid, DOM_SID **sids, size_t *num) { DOM_SID *sid_list = *sids; size_t i; for ( i=0; i<*num; i++ ) { /* if we find the SID, then decrement the count and break out of the loop */ if ( sid_equal(sid, &sid_list[i]) ) { *num -= 1; break; } } /* This loop will copy the remainder of the array if i < num of sids ni the array */ for ( ; i<*num; i++ ) sid_copy( &sid_list[i], &sid_list[i+1] ); return; } bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx, uint32 rid, uint32 **pp_rids, size_t *p_num) { size_t i; for (i=0; i<*p_num; i++) { if ((*pp_rids)[i] == rid) return True; } *pp_rids = TALLOC_REALLOC_ARRAY(mem_ctx, *pp_rids, uint32, *p_num+1); if (*pp_rids == NULL) { *p_num = 0; return False; } (*pp_rids)[*p_num] = rid; *p_num += 1; return True; } bool is_null_sid(const DOM_SID *sid) { static const DOM_SID null_sid = {0}; return sid_equal(sid, &null_sid); } bool is_sid_in_token(const NT_USER_TOKEN *token, const DOM_SID *sid) { int i; for (i=0; i<token->num_sids; i++) { if (sid_compare(sid, &token->user_sids[i]) == 0) return true; } return false; } NTSTATUS sid_array_from_info3(TALLOC_CTX *mem_ctx, const struct netr_SamInfo3 *info3, DOM_SID **user_sids, size_t *num_user_sids, bool include_user_group_rid, bool skip_ressource_groups) { NTSTATUS status; DOM_SID sid; DOM_SID *sid_array = NULL; size_t num_sids = 0; int i; if (include_user_group_rid) { if (!sid_compose(&sid, info3->base.domain_sid, info3->base.rid)) { DEBUG(3, ("could not compose user SID from rid 0x%x\n", info3->base.rid)); return NT_STATUS_INVALID_PARAMETER; } status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids); if (!NT_STATUS_IS_OK(status)) { DEBUG(3, ("could not append user SID from rid 0x%x\n", info3->base.rid)); return status; } } if (!sid_compose(&sid, info3->base.domain_sid, info3->base.primary_gid)) { DEBUG(3, ("could not compose group SID from rid 0x%x\n", info3->base.primary_gid)); return NT_STATUS_INVALID_PARAMETER; } status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids); if (!NT_STATUS_IS_OK(status)) { DEBUG(3, ("could not append group SID from rid 0x%x\n", info3->base.rid)); return status; } for (i = 0; i < info3->base.groups.count; i++) { /* Don't add the primary group sid twice. */ if (info3->base.primary_gid == info3->base.groups.rids[i].rid) { continue; } if (!sid_compose(&sid, info3->base.domain_sid, info3->base.groups.rids[i].rid)) { DEBUG(3, ("could not compose SID from additional group " "rid 0x%x\n", info3->base.groups.rids[i].rid)); return NT_STATUS_INVALID_PARAMETER; } status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids); if (!NT_STATUS_IS_OK(status)) { DEBUG(3, ("could not append SID from additional group " "rid 0x%x\n", info3->base.groups.rids[i].rid)); return status; } } /* Copy 'other' sids. We need to do sid filtering here to prevent possible elevation of privileges. See: http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp */ for (i = 0; i < info3->sidcount; i++) { if (skip_ressource_groups && (info3->sids[i].attributes & SE_GROUP_RESOURCE)) { continue; } status = add_sid_to_array(mem_ctx, info3->sids[i].sid, &sid_array, &num_sids); if (!NT_STATUS_IS_OK(status)) { DEBUG(3, ("could not add SID to array: %s\n", sid_string_dbg(info3->sids[i].sid))); return status; } } *user_sids = sid_array; *num_user_sids = num_sids; return NT_STATUS_OK; }