/* Unix SMB/CIFS implementation. Authentication utility functions Copyright (C) Volker Lendecke 2010 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 . */ #include "includes.h" #include "auth.h" #include "lib/util_unixsids.h" #include "../librpc/gen_ndr/netlogon.h" #include "../libcli/security/security.h" #include "rpc_client/util_netlogon.h" #include "nsswitch/libwbclient/wbclient.h" #include "lib/winbind_util.h" #include "passdb.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_AUTH /*************************************************************************** Make a server_info struct. Free with TALLOC_FREE(). ***************************************************************************/ struct auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx) { struct auth_serversupplied_info *result; result = talloc_zero(mem_ctx, struct auth_serversupplied_info); if (result == NULL) { DEBUG(0, ("talloc failed\n")); return NULL; } /* Initialise the uid and gid values to something non-zero which may save us from giving away root access if there is a bug in allocating these fields. */ result->utok.uid = -1; result->utok.gid = -1; return result; } /**************************************************************************** inits a netr_SamInfo2 structure from an auth_serversupplied_info. sam2 must already be initialized and is used as the talloc parent for its members. *****************************************************************************/ NTSTATUS serverinfo_to_SamInfo2(struct auth_serversupplied_info *server_info, struct netr_SamInfo2 *sam2) { struct netr_SamInfo3 *info3 = NULL; NTSTATUS status; status = copy_netr_SamInfo3(sam2, server_info->info3, &info3); if (!NT_STATUS_IS_OK(status)) { return status; } if (server_info->session_key.length) { memcpy(info3->base.key.key, server_info->session_key.data, MIN(sizeof(info3->base.key.key), server_info->session_key.length)); } if (server_info->lm_session_key.length) { memcpy(info3->base.LMSessKey.key, server_info->lm_session_key.data, MIN(sizeof(info3->base.LMSessKey.key), server_info->lm_session_key.length)); } sam2->base = info3->base; return NT_STATUS_OK; } /**************************************************************************** inits a netr_SamInfo3 structure from an auth_serversupplied_info. sam3 must already be initialized and is used as the talloc parent for its members. *****************************************************************************/ NTSTATUS serverinfo_to_SamInfo3(const struct auth_serversupplied_info *server_info, struct netr_SamInfo3 *sam3) { struct netr_SamInfo3 *info3 = NULL; NTSTATUS status; status = copy_netr_SamInfo3(sam3, server_info->info3, &info3); if (!NT_STATUS_IS_OK(status)) { return status; } if (server_info->session_key.length) { memcpy(info3->base.key.key, server_info->session_key.data, MIN(sizeof(info3->base.key.key), server_info->session_key.length)); } if (server_info->lm_session_key.length) { memcpy(info3->base.LMSessKey.key, server_info->lm_session_key.data, MIN(sizeof(info3->base.LMSessKey.key), server_info->lm_session_key.length)); } sam3->base = info3->base; sam3->sidcount = 0; sam3->sids = NULL; return NT_STATUS_OK; } /**************************************************************************** inits a netr_SamInfo6 structure from an auth_serversupplied_info. sam6 must already be initialized and is used as the talloc parent for its members. *****************************************************************************/ NTSTATUS serverinfo_to_SamInfo6(struct auth_serversupplied_info *server_info, struct netr_SamInfo6 *sam6) { struct pdb_domain_info *dominfo; struct netr_SamInfo3 *info3 = NULL; NTSTATUS status; if ((pdb_capabilities() & PDB_CAP_ADS) == 0) { DEBUG(10,("Not adding validation info level 6 " "without ADS passdb backend\n")); return NT_STATUS_INVALID_INFO_CLASS; } dominfo = pdb_get_domain_info(sam6); if (dominfo == NULL) { return NT_STATUS_NO_MEMORY; } status = copy_netr_SamInfo3(sam6, server_info->info3, &info3); if (!NT_STATUS_IS_OK(status)) { return status; } if (server_info->session_key.length) { memcpy(info3->base.key.key, server_info->session_key.data, MIN(sizeof(info3->base.key.key), server_info->session_key.length)); } if (server_info->lm_session_key.length) { memcpy(info3->base.LMSessKey.key, server_info->lm_session_key.data, MIN(sizeof(info3->base.LMSessKey.key), server_info->lm_session_key.length)); } sam6->base = info3->base; sam6->sidcount = 0; sam6->sids = NULL; sam6->dns_domainname.string = talloc_strdup(sam6, dominfo->dns_domain); if (sam6->dns_domainname.string == NULL) { return NT_STATUS_NO_MEMORY; } sam6->principal_name.string = talloc_asprintf( sam6, "%s@%s", sam6->base.account_name.string, sam6->dns_domainname.string); if (sam6->principal_name.string == NULL) { return NT_STATUS_NO_MEMORY; } return NT_STATUS_OK; } static NTSTATUS append_netr_SidAttr(TALLOC_CTX *mem_ctx, struct netr_SidAttr **sids, uint32_t *count, const struct dom_sid2 *asid, uint32_t attributes) { uint32_t t = *count; *sids = talloc_realloc(mem_ctx, *sids, struct netr_SidAttr, t + 1); if (*sids == NULL) { return NT_STATUS_NO_MEMORY; } (*sids)[t].sid = dom_sid_dup(*sids, asid); if ((*sids)[t].sid == NULL) { return NT_STATUS_NO_MEMORY; } (*sids)[t].attributes = attributes; *count = t + 1; return NT_STATUS_OK; } /* Fills the samr_RidWithAttributeArray with the provided sids. * If it happens that we have additional groups that do not belong * to the domain, add their sids as extra sids */ static NTSTATUS group_sids_to_info3(struct netr_SamInfo3 *info3, const struct dom_sid *sids, size_t num_sids) { uint32_t attributes = SE_GROUP_DEFAULT_FLAGS; struct samr_RidWithAttributeArray *groups; struct dom_sid *domain_sid; unsigned int i; NTSTATUS status; uint32_t rid; bool ok; domain_sid = info3->base.domain_sid; groups = &info3->base.groups; groups->rids = talloc_array(info3, struct samr_RidWithAttribute, num_sids); if (!groups->rids) { return NT_STATUS_NO_MEMORY; } for (i = 0; i < num_sids; i++) { ok = sid_peek_check_rid(domain_sid, &sids[i], &rid); if (ok) { /* store domain group rid */ groups->rids[groups->count].rid = rid; groups->rids[groups->count].attributes = attributes; groups->count++; continue; } /* if this wasn't a domain sid, add it as extra sid */ status = append_netr_SidAttr(info3, &info3->sids, &info3->sidcount, &sids[i], attributes); if (!NT_STATUS_IS_OK(status)) { return status; } } return NT_STATUS_OK; } /* * Merge resource SIDs, if any, into the passed in info3 structure. */ static NTSTATUS merge_resource_sids(const struct PAC_LOGON_INFO *logon_info, struct netr_SamInfo3 *info3) { uint32_t i = 0; const struct PAC_DOMAIN_GROUP_MEMBERSHIP *rg = NULL; if (logon_info->info3.base.user_flags & NETLOGON_RESOURCE_GROUPS) { rg = &logon_info->resource_groups; } if (rg == NULL) { return NT_STATUS_OK; } if (rg->domain_sid == NULL) { DEBUG(10, ("Missing Resource Group Domain SID\n")); return NT_STATUS_INVALID_PARAMETER; } /* The IDL layer would be a better place to check this, but to * guard the integer addition below, we double-check */ if (rg->groups.count > 65535) { DEBUG(10, ("Too much Resource Group RIDs %u\n", (unsigned)rg->groups.count)); return NT_STATUS_INVALID_PARAMETER; } /* * If there are any resource groups (SID Compression) add * them to the extra sids portion of the info3 in the PAC. * * This makes the info3 look like it would if we got the info * from the DC rather than the PAC. */ /* * Construct a SID for each RID in the list and then append it * to the info3. */ for (i = 0; i < rg->groups.count; i++) { NTSTATUS status; struct dom_sid new_sid; uint32_t attributes = rg->groups.rids[i].attributes; struct dom_sid_buf buf; sid_compose(&new_sid, rg->domain_sid, rg->groups.rids[i].rid); DEBUG(10, ("Adding SID %s to extra SIDS\n", dom_sid_str_buf(&new_sid, &buf))); status = append_netr_SidAttr(info3, &info3->sids, &info3->sidcount, &new_sid, attributes); if (!NT_STATUS_IS_OK(status)) { DEBUG(1, ("failed to append SID %s to extra SIDS: %s\n", dom_sid_str_buf(&new_sid, &buf), nt_errstr(status))); return status; } } return NT_STATUS_OK; } /* * Create a copy of an info3 struct from the struct PAC_LOGON_INFO, * then merge resource SIDs, if any, into it. If successful return * the created info3 struct. */ NTSTATUS create_info3_from_pac_logon_info(TALLOC_CTX *mem_ctx, const struct PAC_LOGON_INFO *logon_info, struct netr_SamInfo3 **pp_info3) { NTSTATUS status; struct netr_SamInfo3 *info3 = NULL; status = copy_netr_SamInfo3(mem_ctx, &logon_info->info3, &info3); if (!NT_STATUS_IS_OK(status)) { return status; } status = merge_resource_sids(logon_info, info3); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(info3); return status; } *pp_info3 = info3; return NT_STATUS_OK; } /* * Create a copy of an info6 struct from the PAC_UPN_DNS_INFO and PAC_LOGON_INFO * then merge resource SIDs, if any, into it. If successful return the created * info6 struct. */ NTSTATUS create_info6_from_pac(TALLOC_CTX *mem_ctx, const struct PAC_LOGON_INFO *logon_info, const struct PAC_UPN_DNS_INFO *upn_dns_info, struct netr_SamInfo6 **pp_info6) { NTSTATUS status; struct netr_SamInfo6 *info6 = NULL; struct netr_SamInfo3 *info3 = NULL; info6 = talloc_zero(mem_ctx, struct netr_SamInfo6); if (info6 == NULL) { return NT_STATUS_NO_MEMORY; } status = copy_netr_SamInfo3(info6, &logon_info->info3, &info3); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(info6); return status; } status = merge_resource_sids(logon_info, info3); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(info6); return status; } info6->base = info3->base; info6->sids = info3->sids; info6->sidcount = info3->sidcount; if (upn_dns_info != NULL) { info6->dns_domainname.string = talloc_strdup(info6, upn_dns_info->dns_domain_name); if (info6->dns_domainname.string == NULL) { TALLOC_FREE(info6); return NT_STATUS_NO_MEMORY; } info6->principal_name.string = talloc_strdup(info6, upn_dns_info->upn_name); if (info6->principal_name.string == NULL) { TALLOC_FREE(info6); return NT_STATUS_NO_MEMORY; } } *pp_info6 = info6; return NT_STATUS_OK; } /* * Check if this is a "Unix Users" domain user, or a * "Unix Groups" domain group, we need to handle it * in a special way if that's the case. */ static NTSTATUS SamInfo3_handle_sids(const char *username, const struct dom_sid *user_sid, const struct dom_sid *group_sid, struct netr_SamInfo3 *info3, struct dom_sid *domain_sid, struct extra_auth_info *extra) { struct dom_sid_buf buf; if (sid_check_is_in_unix_users(user_sid)) { /* in info3 you can only set rids for the user and the * primary group, and the domain sid must be that of * the sam domain. * * Store a completely bogus value here. * The real SID is stored in the extra sids. * Other code will know to look there if (-1) is found */ info3->base.rid = (uint32_t)(-1); sid_copy(&extra->user_sid, user_sid); DEBUG(10, ("Unix User found. Rid marked as " "special and sid (%s) saved as extra sid\n", dom_sid_str_buf(user_sid, &buf))); } else { sid_copy(domain_sid, user_sid); sid_split_rid(domain_sid, &info3->base.rid); } if (is_null_sid(domain_sid)) { sid_copy(domain_sid, get_global_sam_sid()); } /* check if this is a "Unix Groups" domain group, * if so we need special handling */ if (sid_check_is_in_unix_groups(group_sid)) { /* in info3 you can only set rids for the user and the * primary group, and the domain sid must be that of * the sam domain. * * Store a completely bogus value here. * The real SID is stored in the extra sids. * Other code will know to look there if (-1) is found */ info3->base.primary_gid = (uint32_t)(-1); sid_copy(&extra->pgid_sid, group_sid); DEBUG(10, ("Unix Group found. Rid marked as " "special and sid (%s) saved as extra sid\n", dom_sid_str_buf(group_sid, &buf))); } else { bool ok = sid_peek_check_rid(domain_sid, group_sid, &info3->base.primary_gid); if (!ok) { struct dom_sid_buf buf2, buf3; DEBUG(1, ("The primary group domain sid(%s) does not " "match the domain sid(%s) for %s(%s)\n", dom_sid_str_buf(group_sid, &buf), dom_sid_str_buf(domain_sid, &buf2), username, dom_sid_str_buf(user_sid, &buf3))); return NT_STATUS_INVALID_SID; } } return NT_STATUS_OK; } #define RET_NOMEM(ptr) do { \ if (!ptr) { \ TALLOC_FREE(info3); \ return NT_STATUS_NO_MEMORY; \ } } while(0) NTSTATUS samu_to_SamInfo3(TALLOC_CTX *mem_ctx, struct samu *samu, const char *login_server, struct netr_SamInfo3 **_info3, struct extra_auth_info *extra) { struct netr_SamInfo3 *info3; const struct dom_sid *user_sid; const struct dom_sid *group_sid; struct dom_sid domain_sid = {0}; struct dom_sid *group_sids; uint32_t num_group_sids = 0; const char *tmp; gid_t *gids; NTSTATUS status; user_sid = pdb_get_user_sid(samu); group_sid = pdb_get_group_sid(samu); if (!user_sid || !group_sid) { DEBUG(1, ("Sam account is missing sids!\n")); return NT_STATUS_UNSUCCESSFUL; } info3 = talloc_zero(mem_ctx, struct netr_SamInfo3); if (!info3) { return NT_STATUS_NO_MEMORY; } status = SamInfo3_handle_sids(pdb_get_username(samu), user_sid, group_sid, info3, &domain_sid, extra); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(info3); return status; } unix_to_nt_time(&info3->base.logon_time, pdb_get_logon_time(samu)); unix_to_nt_time(&info3->base.logoff_time, get_time_t_max()); unix_to_nt_time(&info3->base.kickoff_time, get_time_t_max()); unix_to_nt_time(&info3->base.last_password_change, pdb_get_pass_last_set_time(samu)); unix_to_nt_time(&info3->base.allow_password_change, pdb_get_pass_can_change_time(samu)); unix_to_nt_time(&info3->base.force_password_change, pdb_get_pass_must_change_time(samu)); tmp = pdb_get_username(samu); if (tmp) { info3->base.account_name.string = talloc_strdup(info3, tmp); RET_NOMEM(info3->base.account_name.string); } tmp = pdb_get_fullname(samu); if (tmp) { info3->base.full_name.string = talloc_strdup(info3, tmp); RET_NOMEM(info3->base.full_name.string); } tmp = pdb_get_logon_script(samu); if (tmp) { info3->base.logon_script.string = talloc_strdup(info3, tmp); RET_NOMEM(info3->base.logon_script.string); } tmp = pdb_get_profile_path(samu); if (tmp) { info3->base.profile_path.string = talloc_strdup(info3, tmp); RET_NOMEM(info3->base.profile_path.string); } tmp = pdb_get_homedir(samu); if (tmp) { info3->base.home_directory.string = talloc_strdup(info3, tmp); RET_NOMEM(info3->base.home_directory.string); } tmp = pdb_get_dir_drive(samu); if (tmp) { info3->base.home_drive.string = talloc_strdup(info3, tmp); RET_NOMEM(info3->base.home_drive.string); } info3->base.logon_count = pdb_get_logon_count(samu); info3->base.bad_password_count = pdb_get_bad_password_count(samu); info3->base.logon_domain.string = talloc_strdup(info3, pdb_get_domain(samu)); RET_NOMEM(info3->base.logon_domain.string); info3->base.domain_sid = dom_sid_dup(info3, &domain_sid); RET_NOMEM(info3->base.domain_sid); status = pdb_enum_group_memberships(mem_ctx, samu, &group_sids, &gids, &num_group_sids); if (!NT_STATUS_IS_OK(status)) { DEBUG(1, ("Failed to get groups from sam account.\n")); TALLOC_FREE(info3); return status; } if (num_group_sids) { status = group_sids_to_info3(info3, group_sids, num_group_sids); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(info3); return status; } } /* We don't need sids and gids after the conversion */ TALLOC_FREE(group_sids); TALLOC_FREE(gids); num_group_sids = 0; /* FIXME: should we add other flags ? */ info3->base.user_flags = NETLOGON_EXTRA_SIDS; if (login_server) { info3->base.logon_server.string = talloc_strdup(info3, login_server); RET_NOMEM(info3->base.logon_server.string); } info3->base.acct_flags = pdb_get_acct_ctrl(samu); *_info3 = info3; return NT_STATUS_OK; } NTSTATUS passwd_to_SamInfo3(TALLOC_CTX *mem_ctx, const char *unix_username, const struct passwd *pwd, struct netr_SamInfo3 **pinfo3, struct extra_auth_info *extra) { struct netr_SamInfo3 *info3; NTSTATUS status; TALLOC_CTX *tmp_ctx; const char *domain_name = NULL; const char *user_name = NULL; struct dom_sid domain_sid; struct dom_sid user_sid; struct dom_sid group_sid; enum lsa_SidType type; uint32_t num_sids = 0; struct dom_sid *user_sids = NULL; bool is_null; bool ok; tmp_ctx = talloc_stackframe(); ok = lookup_name_smbconf(tmp_ctx, unix_username, LOOKUP_NAME_ALL, &domain_name, &user_name, &user_sid, &type); if (!ok) { status = NT_STATUS_NO_SUCH_USER; goto done; } if (type != SID_NAME_USER) { status = NT_STATUS_NO_SUCH_USER; goto done; } ok = winbind_lookup_usersids(tmp_ctx, &user_sid, &num_sids, &user_sids); /* Check if winbind is running */ if (ok) { /* * Winbind is running and the first element of the user_sids * is the primary group. */ if (num_sids > 0) { group_sid = user_sids[0]; } } else { /* * Winbind is not running, try to create the group_sid from the * passwd group id. */ /* * This can lead to a primary group of S-1-22-2-XX which * will be rejected by other Samba code. */ gid_to_sid(&group_sid, pwd->pw_gid); } /* * If we are a unix group, or a wellknown/builtin alias, * set the group_sid to the * 'Domain Users' RID of 513 which will always resolve to a * name. */ if (sid_check_is_in_unix_groups(&group_sid) || sid_check_is_in_builtin(&group_sid) || sid_check_is_in_wellknown_domain(&group_sid)) { if (sid_check_is_in_unix_users(&user_sid)) { sid_compose(&group_sid, get_global_sam_sid(), DOMAIN_RID_USERS); } else { sid_copy(&domain_sid, &user_sid); sid_split_rid(&domain_sid, NULL); sid_compose(&group_sid, &domain_sid, DOMAIN_RID_USERS); } } /* Make sure we have a valid group sid */ is_null = is_null_sid(&group_sid); if (is_null) { status = NT_STATUS_NO_SUCH_USER; goto done; } /* Construct a netr_SamInfo3 from the information we have */ info3 = talloc_zero(tmp_ctx, struct netr_SamInfo3); if (!info3) { status = NT_STATUS_NO_MEMORY; goto done; } info3->base.account_name.string = talloc_strdup(info3, unix_username); if (info3->base.account_name.string == NULL) { status = NT_STATUS_NO_MEMORY; goto done; } info3->base.logon_domain.string = talloc_strdup(info3, domain_name); if (info3->base.logon_domain.string == NULL) { status = NT_STATUS_NO_MEMORY; goto done; } ZERO_STRUCT(domain_sid); status = SamInfo3_handle_sids(unix_username, &user_sid, &group_sid, info3, &domain_sid, extra); if (!NT_STATUS_IS_OK(status)) { goto done; } info3->base.domain_sid = dom_sid_dup(info3, &domain_sid); if (info3->base.domain_sid == NULL) { status = NT_STATUS_NO_MEMORY; goto done; } ok = sid_peek_check_rid(&domain_sid, &group_sid, &info3->base.primary_gid); if (!ok) { struct dom_sid_buf buf1, buf2, buf3; DEBUG(1, ("The primary group domain sid(%s) does not " "match the domain sid(%s) for %s(%s)\n", dom_sid_str_buf(&group_sid, &buf1), dom_sid_str_buf(&domain_sid, &buf2), unix_username, dom_sid_str_buf(&user_sid, &buf3))); status = NT_STATUS_INVALID_SID; goto done; } info3->base.acct_flags = ACB_NORMAL; if (num_sids) { status = group_sids_to_info3(info3, user_sids, num_sids); if (!NT_STATUS_IS_OK(status)) { goto done; } } *pinfo3 = talloc_move(mem_ctx, &info3); status = NT_STATUS_OK; done: talloc_free(tmp_ctx); return status; }