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Diffstat (limited to 'source3/lib/util_sid.c')
| -rw-r--r-- | source3/lib/util_sid.c | 720 |
1 files changed, 720 insertions, 0 deletions
diff --git a/source3/lib/util_sid.c b/source3/lib/util_sid.c new file mode 100644 index 0000000000..cd7b64bb70 --- /dev/null +++ b/source3/lib/util_sid.c @@ -0,0 +1,720 @@ +/* + 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 + + 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" + +/* NOTE! the global_sam_sid is the SID of our local SAM. This is only + equal to the domain SID when we are a DC, otherwise its our + workstation SID */ +DOM_SID global_sam_sid; +extern pstring global_myname; +extern fstring global_myworkgroup; + +/* + * Some useful sids + */ + +DOM_SID global_sid_Builtin; /* Local well-known domain */ +DOM_SID global_sid_World_Domain; /* Everyone domain */ +DOM_SID global_sid_World; /* Everyone */ +DOM_SID global_sid_Creator_Owner_Domain; /* Creator Owner domain */ +DOM_SID global_sid_Creator_Owner; /* Creator Owner */ +DOM_SID global_sid_Creator_Group; /* Creator Group */ +DOM_SID global_sid_NT_Authority; /* NT Authority */ +DOM_SID global_sid_NULL; /* NULL sid */ +DOM_SID global_sid_Builtin_Guests; /* Builtin guest users */ +DOM_SID global_sid_Authenticated_Users; /* All authenticated rids */ +DOM_SID global_sid_Network; /* Network rids */ +DOM_SID global_sid_Anonymous; /* Anonymous login */ + +const DOM_SID *global_sid_everyone = &global_sid_World; + +typedef struct _known_sid_users { + uint32 rid; + enum SID_NAME_USE sid_name_use; + char *known_user_name; +} known_sid_users; + +/* static known_sid_users no_users[] = {{0, 0, NULL}}; */ + +static known_sid_users everyone_users[] = { + { 0, SID_NAME_WKN_GRP, "Everyone" }, + {0, (enum SID_NAME_USE)0, NULL}}; + +static known_sid_users creator_owner_users[] = { + { 0, SID_NAME_ALIAS, "Creator Owner" }, + {0, (enum SID_NAME_USE)0, NULL}}; + +static known_sid_users nt_authority_users[] = { + { 1, SID_NAME_ALIAS, "Dialup" }, + { 2, SID_NAME_ALIAS, "Network"}, + { 3, SID_NAME_ALIAS, "Batch"}, + { 4, SID_NAME_ALIAS, "Interactive"}, + { 6, SID_NAME_ALIAS, "Service"}, + { 7, SID_NAME_ALIAS, "AnonymousLogon"}, + { 8, SID_NAME_ALIAS, "Proxy"}, + { 9, SID_NAME_ALIAS, "ServerLogon"}, + { 11, SID_NAME_ALIAS, "Authenticated Users"}, + { 18, SID_NAME_ALIAS, "SYSTEM"}, + { 0, (enum SID_NAME_USE)0, NULL}}; + +static known_sid_users builtin_groups[] = { + { BUILTIN_ALIAS_RID_ADMINS, SID_NAME_ALIAS, "Administrators" }, + { BUILTIN_ALIAS_RID_USERS, SID_NAME_ALIAS, "Users" }, + { BUILTIN_ALIAS_RID_GUESTS, SID_NAME_ALIAS, "Guests" }, + { BUILTIN_ALIAS_RID_ACCOUNT_OPS, SID_NAME_ALIAS, "Account Operators" }, + { BUILTIN_ALIAS_RID_SYSTEM_OPS, SID_NAME_ALIAS, "Server Operators" }, + { BUILTIN_ALIAS_RID_PRINT_OPS, SID_NAME_ALIAS, "Print Operators" }, + { BUILTIN_ALIAS_RID_BACKUP_OPS, SID_NAME_ALIAS, "Backup Operators" }, + { 0, (enum SID_NAME_USE)0, NULL}}; + +#define MAX_SID_NAMES 7 + +static struct sid_name_map_info +{ + DOM_SID *sid; + char *name; + known_sid_users *known_users; +} sid_name_map[MAX_SID_NAMES]; + +static BOOL sid_name_map_initialized = False; + +/* + * An NT compatible anonymous token. + */ + +static DOM_SID anon_sid_array[3]; + +NT_USER_TOKEN anonymous_token = { + 3, + anon_sid_array +}; + +/************************************************************************** + quick init function + *************************************************************************/ +static void init_sid_name_map (void) +{ + int i = 0; + + if (sid_name_map_initialized) return; + + + if ((lp_security() == SEC_USER) && lp_domain_logons()) { + sid_name_map[i].sid = &global_sam_sid; + sid_name_map[i].name = global_myworkgroup; + sid_name_map[i].known_users = NULL; + i++; + sid_name_map[i].sid = &global_sam_sid; + sid_name_map[i].name = global_myname; + sid_name_map[i].known_users = NULL; + i++; + } + else { + sid_name_map[i].sid = &global_sam_sid; + sid_name_map[i].name = global_myname; + sid_name_map[i].known_users = NULL; + i++; + } + + sid_name_map[i].sid = &global_sid_Builtin; + sid_name_map[i].name = "BUILTIN"; + sid_name_map[i].known_users = &builtin_groups[0]; + i++; + + sid_name_map[i].sid = &global_sid_World_Domain; + sid_name_map[i].name = ""; + sid_name_map[i].known_users = &everyone_users[0]; + i++; + + sid_name_map[i].sid = &global_sid_Creator_Owner_Domain; + sid_name_map[i].name = ""; + sid_name_map[i].known_users = &creator_owner_users[0]; + i++; + + sid_name_map[i].sid = &global_sid_NT_Authority; + sid_name_map[i].name = "NT Authority"; + sid_name_map[i].known_users = &nt_authority_users[0]; + i++; + + + /* end of array */ + sid_name_map[i].sid = NULL; + sid_name_map[i].name = NULL; + sid_name_map[i].known_users = NULL; + + sid_name_map_initialized = True; + + return; + +} + +/**************************************************************************** + Creates some useful well known sids +****************************************************************************/ + +void generate_wellknown_sids(void) +{ + string_to_sid(&global_sid_Builtin, "S-1-5-32"); + string_to_sid(&global_sid_Builtin_Guests, "S-1-5-32-546"); + string_to_sid(&global_sid_World_Domain, "S-1-1"); + string_to_sid(&global_sid_World, "S-1-1-0"); + string_to_sid(&global_sid_Creator_Owner_Domain, "S-1-3"); + string_to_sid(&global_sid_Creator_Owner, "S-1-3-0"); + string_to_sid(&global_sid_Creator_Group, "S-1-3-1"); + string_to_sid(&global_sid_NT_Authority, "S-1-5"); + string_to_sid(&global_sid_NULL, "S-1-0-0"); + string_to_sid(&global_sid_Authenticated_Users, "S-1-5-11"); + string_to_sid(&global_sid_Network, "S-1-5-2"); + string_to_sid(&global_sid_Anonymous, "S-1-5-7"); + + /* Create the anon token. */ + sid_copy( &anonymous_token.user_sids[0], &global_sid_World); + sid_copy( &anonymous_token.user_sids[1], &global_sid_Network); + sid_copy( &anonymous_token.user_sids[2], &global_sid_Anonymous); +} + +/************************************************************************** + Turns a domain SID into a name, returned in the nt_domain argument. +***************************************************************************/ + +BOOL map_domain_sid_to_name(DOM_SID *sid, char *nt_domain) +{ + fstring sid_str; + int i = 0; + + sid_to_string(sid_str, sid); + + if (!sid_name_map_initialized) + init_sid_name_map(); + + DEBUG(5,("map_domain_sid_to_name: %s\n", sid_str)); + + if (nt_domain == NULL) + return False; + + while (sid_name_map[i].sid != NULL) { + sid_to_string(sid_str, sid_name_map[i].sid); + DEBUG(5,("map_domain_sid_to_name: compare: %s\n", sid_str)); + if (sid_equal(sid_name_map[i].sid, sid)) { + fstrcpy(nt_domain, sid_name_map[i].name); + DEBUG(5,("map_domain_sid_to_name: found '%s'\n", nt_domain)); + return True; + } + i++; + } + + DEBUG(5,("map_domain_sid_to_name: mapping for %s not found\n", sid_str)); + + return False; +} + +/************************************************************************** + Looks up a known username from one of the known domains. +***************************************************************************/ + +BOOL lookup_known_rid(DOM_SID *sid, uint32 rid, char *name, enum SID_NAME_USE *psid_name_use) +{ + int i = 0; + struct sid_name_map_info *psnm; + + if (!sid_name_map_initialized) + init_sid_name_map(); + + for(i = 0; sid_name_map[i].sid != NULL; i++) { + psnm = &sid_name_map[i]; + if(sid_equal(psnm->sid, sid)) { + int j; + for(j = 0; psnm->known_users && psnm->known_users[j].known_user_name != NULL; j++) { + if(rid == psnm->known_users[j].rid) { + DEBUG(5,("lookup_builtin_rid: rid = %u, domain = '%s', user = '%s'\n", + (unsigned int)rid, psnm->name, psnm->known_users[j].known_user_name )); + fstrcpy( name, psnm->known_users[j].known_user_name); + *psid_name_use = psnm->known_users[j].sid_name_use; + return True; + } + } + } + } + + return False; +} + +/************************************************************************** + Turns a domain name into a SID. + *** side-effect: if the domain name is NULL, it is set to our domain *** +***************************************************************************/ + +BOOL map_domain_name_to_sid(DOM_SID *sid, char *nt_domain) +{ + int i = 0; + + if (nt_domain == NULL) { + DEBUG(5,("map_domain_name_to_sid: mapping NULL domain to our SID.\n")); + sid_copy(sid, &global_sam_sid); + return True; + } + + if (nt_domain[0] == 0) { + fstrcpy(nt_domain, global_myname); + DEBUG(5,("map_domain_name_to_sid: overriding blank name to %s\n", nt_domain)); + sid_copy(sid, &global_sam_sid); + return True; + } + + DEBUG(5,("map_domain_name_to_sid: %s\n", nt_domain)); + + if (!sid_name_map_initialized) + init_sid_name_map(); + + while (sid_name_map[i].name != NULL) { + DEBUG(5,("map_domain_name_to_sid: compare: %s\n", sid_name_map[i].name)); + if (strequal(sid_name_map[i].name, nt_domain)) { + fstring sid_str; + sid_copy(sid, sid_name_map[i].sid); + sid_to_string(sid_str, sid_name_map[i].sid); + DEBUG(5,("map_domain_name_to_sid: found %s\n", sid_str)); + return True; + } + i++; + } + + DEBUG(0,("map_domain_name_to_sid: mapping to %s not found.\n", nt_domain)); + return False; +} + +/************************************************************************** + Splits a name of format \DOMAIN\name or name into its two components. + Sets the DOMAIN name to global_myname if it has not been specified. +***************************************************************************/ + +void split_domain_name(const char *fullname, char *domain, char *name) +{ + pstring full_name; + char *p, *sep; + + sep = lp_winbind_separator(); + + *domain = *name = '\0'; + + if (fullname[0] == sep[0] || fullname[0] == '\\') + fullname++; + + pstrcpy(full_name, fullname); + p = strchr_m(full_name+1, '\\'); + if (!p) p = strchr_m(full_name+1, sep[0]); + + if (p != NULL) { + *p = 0; + fstrcpy(domain, full_name); + fstrcpy(name, p+1); + } else { + fstrcpy(domain, global_myname); + fstrcpy(name, full_name); + } + + DEBUG(10,("split_domain_name:name '%s' split into domain :'%s' and user :'%s'\n", + fullname, domain, name)); +} + +/***************************************************************** + Convert a SID to an ascii string. +*****************************************************************/ + +char *sid_to_string(fstring sidstr_out, DOM_SID *sid) +{ + char subauth[16]; + int i; + /* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */ + uint32 ia = (sid->id_auth[5]) + + (sid->id_auth[4] << 8 ) + + (sid->id_auth[3] << 16) + + (sid->id_auth[2] << 24); + + slprintf(sidstr_out, sizeof(fstring) - 1, "S-%u-%lu", (unsigned int)sid->sid_rev_num, (unsigned long)ia); + + for (i = 0; i < sid->num_auths; i++) { + slprintf(subauth, sizeof(subauth)-1, "-%lu", (unsigned long)sid->sub_auths[i]); + fstrcat(sidstr_out, subauth); + } + + return sidstr_out; +} + +/* + useful function for debug lines +*/ +const char *sid_string_static(DOM_SID *sid) +{ + static fstring sid_str; + sid_to_string(sid_str, sid); + return sid_str; +} + +/***************************************************************** + Convert a string to a SID. Returns True on success, False on fail. +*****************************************************************/ + +BOOL string_to_sid(DOM_SID *sidout, const char *sidstr) +{ + pstring tok; + char *p, *q; + /* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */ + uint32 ia; + + if (StrnCaseCmp( sidstr, "S-", 2)) { + DEBUG(0,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr)); + return False; + } + + memset((char *)sidout, '\0', sizeof(DOM_SID)); + + q = p = strdup(sidstr + 2); + if (p == NULL) { + DEBUG(0, ("string_to_sid: out of memory!\n")); + return False; + } + + if (!next_token(&p, tok, "-", sizeof(tok))) { + DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr)); + SAFE_FREE(q); + return False; + } + + /* Get the revision number. */ + sidout->sid_rev_num = (uint8)strtoul(tok, NULL, 10); + + if (!next_token(&p, tok, "-", sizeof(tok))) { + DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr)); + SAFE_FREE(q); + return False; + } + + /* identauth in decimal should be < 2^32 */ + ia = (uint32)strtoul(tok, NULL, 10); + + /* NOTE - the ia value is in big-endian format. */ + sidout->id_auth[0] = 0; + sidout->id_auth[1] = 0; + sidout->id_auth[2] = (ia & 0xff000000) >> 24; + sidout->id_auth[3] = (ia & 0x00ff0000) >> 16; + sidout->id_auth[4] = (ia & 0x0000ff00) >> 8; + sidout->id_auth[5] = (ia & 0x000000ff); + + sidout->num_auths = 0; + + while(next_token(&p, tok, "-", sizeof(tok)) && + sidout->num_auths < MAXSUBAUTHS) { + /* + * NOTE - the subauths are in native machine-endian format. They + * are converted to little-endian when linearized onto the wire. + */ + sid_append_rid(sidout, (uint32)strtoul(tok, NULL, 10)); + } + + SAFE_FREE(q); + return True; +} + +/***************************************************************** + 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; +} + +/***************************************************************** + 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(DOM_SID *sid, uint32 *rid) +{ + if (sid->num_auths > 0) { + *rid = sid->sub_auths[sid->num_auths - 1]; + return True; + } + return False; +} + +/***************************************************************** + Copies a sid +*****************************************************************/ + +void sid_copy(DOM_SID *dst, const DOM_SID *src) +{ + int i; + + memset((char *)dst, '\0', sizeof(DOM_SID)); + + 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]; +} + +/***************************************************************** + Duplicates a sid - mallocs the target. +*****************************************************************/ + +DOM_SID *sid_dup(DOM_SID *src) +{ + DOM_SID *dst; + + if(!src) + return NULL; + + if((dst = malloc(sizeof(DOM_SID))) != NULL) { + memset(dst, '\0', sizeof(DOM_SID)); + sid_copy( dst, src); + } + + return dst; +} + +/***************************************************************** + Write a sid out into on-the-wire format. +*****************************************************************/ +BOOL sid_linearize(char *outbuf, size_t len, DOM_SID *sid) +{ + size_t i; + + if (len < sid_size(sid)) + 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(char *inbuf, size_t len, DOM_SID *sid) +{ + int i; + if (len < 8) return False; + 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. +*****************************************************************/ +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; +} + + +/***************************************************************** + Check if the SID is our domain SID (S-1-5-21-x-y-z). +*****************************************************************/ +BOOL sid_check_is_domain(const DOM_SID *sid) +{ + return sid_equal(sid, &global_sam_sid); +} + + +/***************************************************************** + Check if the SID is the builtin SID (S-1-5-32). +*****************************************************************/ +BOOL sid_check_is_builtin(const DOM_SID *sid) +{ + return sid_equal(sid, &global_sid_Builtin); +} + + +/***************************************************************** + Check if the SID is our domain SID (S-1-5-21-x-y-z). +*****************************************************************/ +BOOL sid_check_is_in_our_domain(const DOM_SID *sid) +{ + DOM_SID dom_sid; + uint32 rid; + + sid_copy(&dom_sid, sid); + sid_split_rid(&dom_sid, &rid); + + return sid_equal(&dom_sid, &global_sam_sid); +} + +/***************************************************************** + Check if the SID is our domain SID (S-1-5-21-x-y-z). +*****************************************************************/ +BOOL sid_check_is_in_builtin(const DOM_SID *sid) +{ + DOM_SID dom_sid; + uint32 rid; + + sid_copy(&dom_sid, sid); + sid_split_rid(&dom_sid, &rid); + + return sid_equal(&dom_sid, &global_sid_Builtin); +} + + +/***************************************************************** + Calculates size of a sid. +*****************************************************************/ + +size_t sid_size(DOM_SID *sid) +{ + if (sid == NULL) + return 0; + + return sid->num_auths * sizeof(uint32) + 8; +} + +/***************************************************************** + 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_Creator_Owner_Domain)) + 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(DOM_SID *sid) +{ + char *buf, *s; + int len = sid_size(sid); + buf = malloc(len); + if (!buf) return NULL; + sid_linearize(buf, len, sid); + s = binary_string(buf, len); + free(buf); + return s; +} + |