/* 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 <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "../lib/crypto/arcfour.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_AUTH /* FIXME: do we really still need this ? */ static int server_info_dtor(struct auth_serversupplied_info *server_info) { TALLOC_FREE(server_info->info3); ZERO_STRUCTP(server_info); return 0; } /*************************************************************************** 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_P(mem_ctx, struct auth_serversupplied_info); if (result == NULL) { DEBUG(0, ("talloc failed\n")); return NULL; } talloc_set_destructor(result, server_info_dtor); /* 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, uint8_t *pipe_session_key, size_t pipe_session_key_len, struct netr_SamInfo2 *sam2) { struct netr_SamInfo3 *info3; info3 = copy_netr_SamInfo3(sam2, server_info->info3); if (!info3) { return NT_STATUS_NO_MEMORY; } if (server_info->user_session_key.length) { memcpy(info3->base.key.key, server_info->user_session_key.data, MIN(sizeof(info3->base.key.key), server_info->user_session_key.length)); if (pipe_session_key) { arcfour_crypt(info3->base.key.key, pipe_session_key, 16); } } 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)); if (pipe_session_key) { arcfour_crypt(info3->base.LMSessKey.key, pipe_session_key, 8); } } 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(struct auth_serversupplied_info *server_info, uint8_t *pipe_session_key, size_t pipe_session_key_len, struct netr_SamInfo3 *sam3) { struct netr_SamInfo3 *info3; info3 = copy_netr_SamInfo3(sam3, server_info->info3); if (!info3) { return NT_STATUS_NO_MEMORY; } if (server_info->user_session_key.length) { memcpy(info3->base.key.key, server_info->user_session_key.data, MIN(sizeof(info3->base.key.key), server_info->user_session_key.length)); if (pipe_session_key) { arcfour_crypt(info3->base.key.key, pipe_session_key, 16); } } 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)); if (pipe_session_key) { arcfour_crypt(info3->base.LMSessKey.key, pipe_session_key, 8); } } 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, uint8_t *pipe_session_key, size_t pipe_session_key_len, struct netr_SamInfo6 *sam6) { struct pdb_domain_info *dominfo; struct netr_SamInfo3 *info3; 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; } info3 = copy_netr_SamInfo3(sam6, server_info->info3); if (!info3) { return NT_STATUS_NO_MEMORY; } if (server_info->user_session_key.length) { memcpy(info3->base.key.key, server_info->user_session_key.data, MIN(sizeof(info3->base.key.key), server_info->user_session_key.length)); if (pipe_session_key) { arcfour_crypt(info3->base.key.key, pipe_session_key, 16); } } 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)); if (pipe_session_key) { arcfour_crypt(info3->base.LMSessKey.key, pipe_session_key, 8); } } 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->principle.string = talloc_asprintf(sam6, "%s@%s", sam6->base.account_name.string, sam6->dns_domainname.string); if (sam6->principle.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 = sid_dup_talloc(*sids, asid); if ((*sids)[t].sid == NULL) { return NT_STATUS_NO_MEMORY; } (*sids)[t].attributes = attributes; *count = t + 1; return NT_STATUS_OK; } /* Fils 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_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED; 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) { /* if it is the primary gid, skip it, we * obviously already have it */ if (info3->base.primary_gid == rid) continue; /* store domain group rid */ groups->rids[i].rid = rid; groups->rids[i].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; } #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; struct dom_sid *group_sids; size_t num_group_sids = 0; const char *tmp; gid_t *gids; NTSTATUS status; bool ok; 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; } ZERO_STRUCT(domain_sid); /* check if this is a "Unix Users" domain user, * we need to handle it in a special way if that's the case */ if (sid_compare_domain(user_sid, &global_sid_Unix_Users) == 0) { /* 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 in struct samu. Rid marked as " "special and sid (%s) saved as extra sid\n", sid_string_dbg(user_sid))); } 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_compare_domain(group_sid, &global_sid_Unix_Groups) == 0) { /* 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 in struct samu. Rid marked as " "special and sid (%s) saved as extra sid\n", sid_string_dbg(group_sid))); } else { ok = sid_peek_check_rid(&domain_sid, group_sid, &info3->base.primary_gid); if (!ok) { DEBUG(1, ("The primary group domain sid(%s) does not" "match the domain sid(%s) for %s(%s)\n", sid_string_dbg(group_sid), sid_string_dbg(&domain_sid), pdb_get_username(samu), sid_string_dbg(user_sid))); TALLOC_FREE(info3); return NT_STATUS_UNSUCCESSFUL; } } unix_to_nt_time(&info3->base.last_logon, pdb_get_logon_time(samu)); unix_to_nt_time(&info3->base.last_logoff, get_time_t_max()); unix_to_nt_time(&info3->base.acct_expiry, 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); 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.domain.string = talloc_strdup(info3, pdb_get_domain(samu)); RET_NOMEM(info3->base.domain.string); info3->base.domain_sid = sid_dup_talloc(info3, &domain_sid); RET_NOMEM(info3->base.domain_sid); info3->base.acct_flags = pdb_get_acct_ctrl(samu); *_info3 = info3; return NT_STATUS_OK; } #undef RET_NOMEM #define RET_NOMEM(ptr) do { \ if (!ptr) { \ TALLOC_FREE(info3); \ return NULL; \ } } while(0) struct netr_SamInfo3 *copy_netr_SamInfo3(TALLOC_CTX *mem_ctx, struct netr_SamInfo3 *orig) { struct netr_SamInfo3 *info3; unsigned int i; info3 = talloc_zero(mem_ctx, struct netr_SamInfo3); if (!info3) return NULL; /* first copy all, then realloc pointers */ info3->base = orig->base; if (orig->base.account_name.string) { info3->base.account_name.string = talloc_strdup(info3, orig->base.account_name.string); RET_NOMEM(info3->base.account_name.string); } if (orig->base.full_name.string) { info3->base.full_name.string = talloc_strdup(info3, orig->base.full_name.string); RET_NOMEM(info3->base.full_name.string); } if (orig->base.logon_script.string) { info3->base.logon_script.string = talloc_strdup(info3, orig->base.logon_script.string); RET_NOMEM(info3->base.logon_script.string); } if (orig->base.profile_path.string) { info3->base.profile_path.string = talloc_strdup(info3, orig->base.profile_path.string); RET_NOMEM(info3->base.profile_path.string); } if (orig->base.home_directory.string) { info3->base.home_directory.string = talloc_strdup(info3, orig->base.home_directory.string); RET_NOMEM(info3->base.home_directory.string); } if (orig->base.home_drive.string) { info3->base.home_drive.string = talloc_strdup(info3, orig->base.home_drive.string); RET_NOMEM(info3->base.home_drive.string); } if (orig->base.groups.count) { info3->base.groups.rids = (struct samr_RidWithAttribute *) talloc_memdup(info3, orig->base.groups.rids, (sizeof(struct samr_RidWithAttribute) * orig->base.groups.count)); RET_NOMEM(info3->base.groups.rids); } if (orig->base.logon_server.string) { info3->base.logon_server.string = talloc_strdup(info3, orig->base.logon_server.string); RET_NOMEM(info3->base.logon_server.string); } if (orig->base.domain.string) { info3->base.domain.string = talloc_strdup(info3, orig->base.domain.string); RET_NOMEM(info3->base.domain.string); } if (orig->base.domain_sid) { info3->base.domain_sid = sid_dup_talloc(info3, orig->base.domain_sid); RET_NOMEM(info3->base.domain_sid); } if (orig->sidcount) { info3->sids = talloc_array(info3, struct netr_SidAttr, orig->sidcount); RET_NOMEM(info3->sids); for (i = 0; i < orig->sidcount; i++) { info3->sids[i].sid = sid_dup_talloc(info3->sids, orig->sids[i].sid); RET_NOMEM(info3->sids[i].sid); } } return info3; } static NTSTATUS wbcsids_to_samr_RidWithAttributeArray( TALLOC_CTX *mem_ctx, struct samr_RidWithAttributeArray *groups, const struct dom_sid *domain_sid, const struct wbcSidWithAttr *sids, size_t num_sids) { unsigned int i; bool ok; groups->rids = talloc_array(mem_ctx, struct samr_RidWithAttribute, num_sids); if (!groups->rids) { return NT_STATUS_NO_MEMORY; } /* a wbcDomainSid is the same as a dom_sid */ for (i = 0; i < num_sids; i++) { ok = sid_peek_check_rid(domain_sid, (const struct dom_sid *)&sids[i].sid, &groups->rids[i].rid); if (!ok) continue; groups->rids[i].attributes = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED; groups->count++; } return NT_STATUS_OK; } struct netr_SamInfo3 *wbcAuthUserInfo_to_netr_SamInfo3(TALLOC_CTX *mem_ctx, const struct wbcAuthUserInfo *info) { struct netr_SamInfo3 *info3; struct dom_sid user_sid; struct dom_sid group_sid; struct dom_sid domain_sid; NTSTATUS status; bool ok; memcpy(&user_sid, &info->sids[0].sid, sizeof(user_sid)); memcpy(&group_sid, &info->sids[1].sid, sizeof(group_sid)); info3 = talloc_zero(mem_ctx, struct netr_SamInfo3); if (!info3) return NULL; info3->base.last_logon = info->logon_time; info3->base.last_logoff = info->logoff_time; info3->base.acct_expiry = info->kickoff_time; info3->base.last_password_change = info->pass_last_set_time; info3->base.allow_password_change = info->pass_can_change_time; info3->base.force_password_change = info->pass_must_change_time; if (info->account_name) { info3->base.account_name.string = talloc_strdup(info3, info->account_name); RET_NOMEM(info3->base.account_name.string); } if (info->full_name) { info3->base.full_name.string = talloc_strdup(info3, info->full_name); RET_NOMEM(info3->base.full_name.string); } if (info->logon_script) { info3->base.logon_script.string = talloc_strdup(info3, info->logon_script); RET_NOMEM(info3->base.logon_script.string); } if (info->profile_path) { info3->base.profile_path.string = talloc_strdup(info3, info->profile_path); RET_NOMEM(info3->base.profile_path.string); } if (info->home_directory) { info3->base.home_directory.string = talloc_strdup(info3, info->home_directory); RET_NOMEM(info3->base.home_directory.string); } if (info->home_drive) { info3->base.home_drive.string = talloc_strdup(info3, info->home_drive); RET_NOMEM(info3->base.home_drive.string); } info3->base.logon_count = info->logon_count; info3->base.bad_password_count = info->bad_password_count; sid_copy(&domain_sid, &user_sid); sid_split_rid(&domain_sid, &info3->base.rid); ok = sid_peek_check_rid(&domain_sid, &group_sid, &info3->base.primary_gid); if (!ok) { DEBUG(1, ("The primary group sid domain does not" "match user sid domain for user: %s\n", info->account_name)); TALLOC_FREE(info3); return NULL; } status = wbcsids_to_samr_RidWithAttributeArray(info3, &info3->base.groups, &domain_sid, &info->sids[1], info->num_sids - 1); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(info3); return NULL; } info3->base.user_flags = info->user_flags; memcpy(info3->base.key.key, info->user_session_key, 16); if (info->logon_server) { info3->base.logon_server.string = talloc_strdup(info3, info->logon_server); RET_NOMEM(info3->base.logon_server.string); } if (info->domain_name) { info3->base.domain.string = talloc_strdup(info3, info->domain_name); RET_NOMEM(info3->base.domain.string); } info3->base.domain_sid = sid_dup_talloc(info3, &domain_sid); RET_NOMEM(info3->base.domain_sid); memcpy(info3->base.LMSessKey.key, info->lm_session_key, 8); info3->base.acct_flags = info->acct_flags; return info3; }