/* Unix SMB/CIFS implementation. Password and authentication handling Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2004 Copyright (C) Gerald Carter 2003 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_AUTH /**************************************************************************** Do a specific test for an smb password being correct, given a smb_password and the lanman and NT responses. ****************************************************************************/ static NTSTATUS sam_password_ok(const struct auth_context *auth_context, TALLOC_CTX *mem_ctx, const char *username, uint16_t acct_flags, const struct samr_Password *lm_pwd, const struct samr_Password *nt_pwd, const struct auth_usersupplied_info *user_info, DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key) { if (acct_flags & ACB_PWNOTREQ) { if (lp_null_passwords()) { DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username)); return NT_STATUS_OK; } else { DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username)); return NT_STATUS_LOGON_FAILURE; } } return ntlm_password_check(mem_ctx, &auth_context->challenge, &user_info->lm_resp, &user_info->nt_resp, &user_info->lm_interactive_password, &user_info->nt_interactive_password, username, user_info->smb_name.str, user_info->client_domain.str, lm_pwd->hash, nt_pwd->hash, user_sess_key, lm_sess_key); } /**************************************************************************** Do a specific test for a SAM_ACCOUNT being vaild for this connection (ie not disabled, expired and the like). ****************************************************************************/ static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx, const char *username, uint16_t acct_flags, NTTIME *acct_expiry, NTTIME *must_change_time, NTTIME *last_set_time, const char *workstation_list, const struct auth_usersupplied_info *user_info) { DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n", username)); /* Quit if the account was disabled. */ if (acct_flags & ACB_DISABLED) { DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", username)); return NT_STATUS_ACCOUNT_DISABLED; } /* Quit if the account was locked out. */ if (acct_flags & ACB_AUTOLOCK) { DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", username)); return NT_STATUS_ACCOUNT_LOCKED_OUT; } /* Test account expire time */ if ((*acct_expiry) != -1 && time(NULL) > nt_time_to_unix(*acct_expiry)) { DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", username)); DEBUG(3,("sam_account_ok: Account expired at '%s'.\n", nt_time_string(mem_ctx, *acct_expiry))); return NT_STATUS_ACCOUNT_EXPIRED; } if (!(acct_flags & ACB_PWNOEXP)) { /* check for immediate expiry "must change at next logon" */ if (*must_change_time == 0 && *last_set_time != 0) { DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", username)); return NT_STATUS_PASSWORD_MUST_CHANGE; } /* check for expired password */ if ((*must_change_time) != 0 && nt_time_to_unix(*must_change_time) < time(NULL)) { DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", username)); DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n", nt_time_string(mem_ctx, *must_change_time))); return NT_STATUS_PASSWORD_EXPIRED; } } /* Test workstation. Workstation list is comma separated. */ if (workstation_list && *workstation_list) { BOOL invalid_ws = True; const char *s = workstation_list; fstring tok; while (next_token(&s, tok, ",", sizeof(tok))) { DEBUG(10,("sam_account_ok: checking for workstation match %s and %s (len=%d)\n", tok, user_info->wksta_name.str, user_info->wksta_name.len)); if(strequal(tok, user_info->wksta_name.str)) { invalid_ws = False; break; } } if (invalid_ws) return NT_STATUS_INVALID_WORKSTATION; } if (acct_flags & ACB_DOMTRUST) { DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", username)); return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT; } if (acct_flags & ACB_SVRTRUST) { DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", username)); return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT; } if (acct_flags & ACB_WSTRUST) { DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", username)); return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT; } return NT_STATUS_OK; } /**************************************************************************** check if a username/password is OK assuming the password is a 24 byte SMB hash supplied in the user_info structure return an NT_STATUS constant. ****************************************************************************/ static NTSTATUS check_sam_security(const struct auth_context *auth_context, void *my_private_data, TALLOC_CTX *mem_ctx, const struct auth_usersupplied_info *user_info, struct auth_serversupplied_info **server_info) { struct ldb_message **msgs; struct ldb_message **msgs_domain; void *sam_ctx; char *username = user_info->internal_username.str; uint16_t acct_flags; const char *workstation_list; NTTIME acct_expiry; NTTIME must_change_time; NTTIME last_set_time; uint_t ret; uint_t ret_domain; const char *domain_dn; const char *domain_sid; NTSTATUS nt_status; DATA_BLOB user_sess_key = data_blob(NULL, 0); DATA_BLOB lm_sess_key = data_blob(NULL, 0); struct samr_Password *lm_pwd, *nt_pwd; const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash", "userAccountControl", "pwdLastSet", "accountExpires", "objectSid", "userWorkstations", /* required for server_info, not access control: */ "sAMAaccountName", "displayName", "scriptPath", "profilePath", "homeDirectory", "homeDrive", "lastLogon", "lastLogoff", "accountExpires", "badPwdCount", "logonCount", NULL, }; const char *domain_attrs[] = {"name"}; if (!user_info || !auth_context) { return NT_STATUS_UNSUCCESSFUL; } sam_ctx = samdb_connect(); if (sam_ctx == NULL) { return NT_STATUS_INVALID_SYSTEM_SERVICE; } /* pull the user attributes */ ret = samdb_search(sam_ctx, mem_ctx, NULL, &msgs, attrs, "(&(sAMAccountName=%s)(objectclass=user))", username); if (ret == 0) { DEBUG(3,("check_sam_security: Couldn't find user [%s] in passdb file.\n", username)); samdb_close(sam_ctx); return NT_STATUS_NO_SUCH_USER; } if (ret > 1) { DEBUG(1,("Found %d records matching user [%s]\n", ret, username)); samdb_close(sam_ctx); return NT_STATUS_INTERNAL_DB_CORRUPTION; } domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid"); if (!domain_sid) { samdb_close(sam_ctx); return NT_STATUS_INTERNAL_DB_CORRUPTION; } /* find the domain's DN */ ret_domain = samdb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs, "(&(objectSid=%s)(objectclass=domain))", domain_sid); if (ret_domain == 0) { DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n", domain_sid)); samdb_close(sam_ctx); return NT_STATUS_NO_SUCH_USER; } if (ret_domain > 1) { DEBUG(1,("Found %d records matching domain [%s]\n", ret_domain, domain_sid)); samdb_close(sam_ctx); return NT_STATUS_INTERNAL_DB_CORRUPTION; } domain_dn = msgs_domain[0]->dn; acct_flags = samdb_result_acct_flags(msgs[0], "sAMAcctFlags"); /* Quit if the account was locked out. */ if (acct_flags & ACB_AUTOLOCK) { DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", username)); samdb_close(sam_ctx); return NT_STATUS_ACCOUNT_LOCKED_OUT; } if (!NT_STATUS_IS_OK(nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd))) { return nt_status; } nt_status = sam_password_ok(auth_context, mem_ctx, username, acct_flags, lm_pwd, nt_pwd, user_info, &user_sess_key, &lm_sess_key); if (!NT_STATUS_IS_OK(nt_status)) { samdb_close(sam_ctx); return nt_status; } acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0); must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx, domain_dn, msgs[0], "pwdLastSet"); last_set_time = samdb_result_nttime(msgs[0], "pwdLastSet", 0); workstation_list = samdb_result_string(msgs[0], "userWorkstations", NULL); nt_status = sam_account_ok(mem_ctx, username, acct_flags, &acct_expiry, &must_change_time, &last_set_time, workstation_list, user_info); if (!NT_STATUS_IS_OK(nt_status)) { samdb_close(sam_ctx); return nt_status; } if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, username))) { DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status))); samdb_close(sam_ctx); return nt_status; } { struct ldb_message **group_msgs; char *dn = msgs[0]->dn; int group_ret; const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL }; /* find list of sids */ struct dom_sid **groupSIDs = NULL; struct dom_sid *user_sid; struct dom_sid *primary_group_sid; const char *sidstr; int i; group_ret = samdb_search(sam_ctx, mem_ctx, NULL, &group_msgs, group_attrs, "(&(member=%s)(sAMAccountType=*))", dn); if (!(groupSIDs = talloc_realloc_p((*server_info)->mem_ctx, groupSIDs, struct dom_sid *, group_ret))) { talloc_destroy((*server_info)->mem_ctx); samdb_close(sam_ctx); return NT_STATUS_NO_MEMORY; } /* Need to unroll some nested groups, but not aliases */ for (i = 0; i < group_ret; i++) { sidstr = ldb_msg_find_string(group_msgs[i], "objectSid", NULL); groupSIDs[i] = dom_sid_parse_talloc((*server_info)->mem_ctx, sidstr); } sidstr = ldb_msg_find_string(msgs[0], "objectSid", NULL); user_sid = dom_sid_parse_talloc((*server_info)->mem_ctx, sidstr); primary_group_sid = dom_sid_parse_talloc((*server_info)->mem_ctx, sidstr); primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = samdb_result_uint(msgs[0], "primaryGroupID", 0); (*server_info)->user_sid = user_sid; (*server_info)->primary_group_sid = primary_group_sid; (*server_info)->n_domain_groups = group_ret; (*server_info)->domain_groups = groupSIDs; } (*server_info)->account_name = talloc_strdup((*server_info)->mem_ctx, samdb_result_string(msgs[0], "sAMAccountName", "")); (*server_info)->domain = talloc_strdup((*server_info)->mem_ctx, samdb_result_string(msgs_domain[0], "name", "")); (*server_info)->full_name = talloc_strdup((*server_info)->mem_ctx, samdb_result_string(msgs[0], "displayName", "")); (*server_info)->logon_script = talloc_strdup((*server_info)->mem_ctx, samdb_result_string(msgs[0], "scriptPath", "")); (*server_info)->profile_path = talloc_strdup((*server_info)->mem_ctx, samdb_result_string(msgs[0], "profilePath", "")); (*server_info)->home_directory = talloc_strdup((*server_info)->mem_ctx, samdb_result_string(msgs[0], "homeDirectory", "")); (*server_info)->home_drive = talloc_strdup((*server_info)->mem_ctx, samdb_result_string(msgs[0], "homeDrive", "")); (*server_info)->last_logon = samdb_result_nttime(msgs[0], "lastLogon", 0); (*server_info)->last_logoff = samdb_result_nttime(msgs[0], "lastLogoff", 0); (*server_info)->acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0); (*server_info)->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0); (*server_info)->allow_password_change = samdb_result_allow_password_change(sam_ctx, mem_ctx, domain_dn, msgs[0], "pwdLastSet"); (*server_info)->allow_password_change = samdb_result_force_password_change(sam_ctx, mem_ctx, domain_dn, msgs[0], "pwdLastSet"); (*server_info)->logon_count = samdb_result_uint(msgs[0], "logonCount", 0); (*server_info)->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0); (*server_info)->acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl"); (*server_info)->guest = False; (*server_info)->user_session_key = user_sess_key; (*server_info)->lm_session_key = lm_sess_key; if (!(*server_info)->account_name || !(*server_info)->full_name || !(*server_info)->logon_script || !(*server_info)->profile_path || !(*server_info)->home_directory || !(*server_info)->home_drive) { talloc_destroy((*server_info)->mem_ctx); return NT_STATUS_NO_MEMORY; } samdb_close(sam_ctx); return nt_status; } /* module initialisation */ static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, struct auth_methods **auth_method) { if (!make_auth_methods(auth_context, auth_method)) { return NT_STATUS_NO_MEMORY; } (*auth_method)->auth = check_sam_security; (*auth_method)->name = "sam_ignoredomain"; return NT_STATUS_OK; } /**************************************************************************** Check SAM security (above) but with a few extra checks. ****************************************************************************/ static NTSTATUS check_samstrict_security(const struct auth_context *auth_context, void *my_private_data, TALLOC_CTX *mem_ctx, const struct auth_usersupplied_info *user_info, struct auth_serversupplied_info **server_info) { if (!user_info || !auth_context) { return NT_STATUS_LOGON_FAILURE; } /* If we are a domain member, we must not attempt to check the password locally, unless it is one of our aliases. */ if (!is_myname(user_info->domain.str)) { DEBUG(7,("The requested user domain is not the local server name. [%s]\\[%s]\n", user_info->domain.str,user_info->internal_username.str)); return NT_STATUS_NO_SUCH_USER; } return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info); } /* module initialisation */ static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, struct auth_methods **auth_method) { if (!make_auth_methods(auth_context, auth_method)) { return NT_STATUS_NO_MEMORY; } (*auth_method)->auth = check_samstrict_security; (*auth_method)->name = "sam"; return NT_STATUS_OK; } NTSTATUS auth_sam_init(void) { NTSTATUS ret; struct auth_operations ops; ops.name = "sam"; ops.init = auth_init_sam; ret = register_backend("auth", &ops); if (!NT_STATUS_IS_OK(ret)) { DEBUG(0,("Failed to register '%s' auth backend!\n", ops.name)); return ret; } ops.name = "sam_ignoredomain"; ops.init = auth_init_sam_ignoredomain; ret = register_backend("auth", &ops); if (!NT_STATUS_IS_OK(ret)) { DEBUG(0,("Failed to register '%s' auth backend!\n", ops.name)); return ret; } return ret; }