/* Unix SMB/CIFS implementation. Winbind daemon - pam auth funcions Copyright (C) Andrew Tridgell 2000 Copyright (C) Tim Potter 2001 Copyright (C) Andrew Bartlett 2001-2002 Copyright (C) Guenther Deschner 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 . */ #include "includes.h" #include "winbindd.h" #include "libsmb/namequery.h" #include "../libcli/auth/libcli_auth.h" #include "../librpc/gen_ndr/ndr_samr_c.h" #include "rpc_client/cli_pipe.h" #include "rpc_client/cli_samr.h" #include "../librpc/gen_ndr/ndr_netlogon.h" #include "rpc_client/cli_netlogon.h" #include "smb_krb5.h" #include "../lib/crypto/arcfour.h" #include "../libcli/security/security.h" #include "ads.h" #include "../librpc/gen_ndr/krb5pac.h" #include "passdb/machine_sid.h" #include "auth.h" #include "../lib/tsocket/tsocket.h" #include "auth/kerberos/pac_utils.h" #include "auth/gensec/gensec.h" #include "librpc/crypto/gse_krb5.h" #include "lib/afs/afs_funcs.h" #include "libsmb/samlogon_cache.h" #include "rpc_client/util_netlogon.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_WINBIND #define LOGON_KRB5_FAIL_CLOCK_SKEW 0x02000000 static NTSTATUS append_info3_as_txt(TALLOC_CTX *mem_ctx, struct winbindd_response *resp, uint16_t validation_level, union netr_Validation *validation) { struct netr_SamInfo3 *info3 = NULL; char *ex = NULL; uint32_t i; NTSTATUS status = NT_STATUS_UNSUCCESSFUL; TALLOC_CTX *frame = talloc_stackframe(); status = map_validation_to_info3(frame, validation_level, validation, &info3); if (!NT_STATUS_IS_OK(status)) { goto out; } resp->data.auth.info3.logon_time = nt_time_to_unix(info3->base.logon_time); resp->data.auth.info3.logoff_time = nt_time_to_unix(info3->base.logoff_time); resp->data.auth.info3.kickoff_time = nt_time_to_unix(info3->base.kickoff_time); resp->data.auth.info3.pass_last_set_time = nt_time_to_unix(info3->base.last_password_change); resp->data.auth.info3.pass_can_change_time = nt_time_to_unix(info3->base.allow_password_change); resp->data.auth.info3.pass_must_change_time = nt_time_to_unix(info3->base.force_password_change); resp->data.auth.info3.logon_count = info3->base.logon_count; resp->data.auth.info3.bad_pw_count = info3->base.bad_password_count; resp->data.auth.info3.user_rid = info3->base.rid; resp->data.auth.info3.group_rid = info3->base.primary_gid; sid_to_fstring(resp->data.auth.info3.dom_sid, info3->base.domain_sid); resp->data.auth.info3.num_groups = info3->base.groups.count; resp->data.auth.info3.user_flgs = info3->base.user_flags; resp->data.auth.info3.acct_flags = info3->base.acct_flags; resp->data.auth.info3.num_other_sids = info3->sidcount; fstrcpy(resp->data.auth.info3.user_name, info3->base.account_name.string); fstrcpy(resp->data.auth.info3.full_name, info3->base.full_name.string); fstrcpy(resp->data.auth.info3.logon_script, info3->base.logon_script.string); fstrcpy(resp->data.auth.info3.profile_path, info3->base.profile_path.string); fstrcpy(resp->data.auth.info3.home_dir, info3->base.home_directory.string); fstrcpy(resp->data.auth.info3.dir_drive, info3->base.home_drive.string); fstrcpy(resp->data.auth.info3.logon_srv, info3->base.logon_server.string); fstrcpy(resp->data.auth.info3.logon_dom, info3->base.logon_domain.string); resp->data.auth.validation_level = validation_level; if (validation_level == 6) { fstrcpy(resp->data.auth.info6.dns_domainname, validation->sam6->dns_domainname.string); fstrcpy(resp->data.auth.info6.principal_name, validation->sam6->principal_name.string); } ex = talloc_strdup(frame, ""); if (ex == NULL) { status = NT_STATUS_NO_MEMORY; goto out; } for (i=0; i < info3->base.groups.count; i++) { ex = talloc_asprintf_append_buffer(ex, "0x%08X:0x%08X\n", info3->base.groups.rids[i].rid, info3->base.groups.rids[i].attributes); if (ex == NULL) { status = NT_STATUS_NO_MEMORY; goto out; } } for (i=0; i < info3->sidcount; i++) { char *sid; sid = dom_sid_string(frame, info3->sids[i].sid); if (sid == NULL) { status = NT_STATUS_NO_MEMORY; goto out; } ex = talloc_asprintf_append_buffer(ex, "%s:0x%08X\n", sid, info3->sids[i].attributes); if (ex == NULL) { status = NT_STATUS_NO_MEMORY; goto out; } } resp->length += talloc_get_size(ex); resp->extra_data.data = talloc_move(mem_ctx, &ex); status = NT_STATUS_OK; out: TALLOC_FREE(frame); return status; } static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx, struct winbindd_response *resp, struct netr_SamInfo3 *info3) { DATA_BLOB blob; enum ndr_err_code ndr_err; ndr_err = ndr_push_struct_blob(&blob, mem_ctx, info3, (ndr_push_flags_fn_t)ndr_push_netr_SamInfo3); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { DEBUG(0,("append_info3_as_ndr: failed to append\n")); return ndr_map_error2ntstatus(ndr_err); } resp->extra_data.data = blob.data; resp->length += blob.length; return NT_STATUS_OK; } static NTSTATUS append_unix_username(TALLOC_CTX *mem_ctx, struct winbindd_response *resp, const struct netr_SamInfo3 *info3, const char *name_domain, const char *name_user) { /* We've been asked to return the unix username, per 'winbind use default domain' settings and the like */ const char *nt_username, *nt_domain; nt_domain = talloc_strdup(mem_ctx, info3->base.logon_domain.string); if (!nt_domain) { /* If the server didn't give us one, just use the one * we sent them */ nt_domain = name_domain; } nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string); if (!nt_username) { /* If the server didn't give us one, just use the one * we sent them */ nt_username = name_user; } fill_domain_username(resp->data.auth.unix_username, nt_domain, nt_username, true); DEBUG(5, ("Setting unix username to [%s]\n", resp->data.auth.unix_username)); return NT_STATUS_OK; } static NTSTATUS append_afs_token(TALLOC_CTX *mem_ctx, struct winbindd_response *resp, const struct netr_SamInfo3 *info3, const char *name_domain, const char *name_user) { char *afsname = NULL; char *cell; char *token; afsname = talloc_strdup(mem_ctx, lp_afs_username_map()); if (afsname == NULL) { return NT_STATUS_NO_MEMORY; } afsname = talloc_string_sub(mem_ctx, lp_afs_username_map(), "%D", name_domain); afsname = talloc_string_sub(mem_ctx, afsname, "%u", name_user); afsname = talloc_string_sub(mem_ctx, afsname, "%U", name_user); { struct dom_sid user_sid; fstring sidstr; sid_compose(&user_sid, info3->base.domain_sid, info3->base.rid); sid_to_fstring(sidstr, &user_sid); afsname = talloc_string_sub(mem_ctx, afsname, "%s", sidstr); } if (afsname == NULL) { return NT_STATUS_NO_MEMORY; } if (!strlower_m(afsname)) { return NT_STATUS_INVALID_PARAMETER; } DEBUG(10, ("Generating token for user %s\n", afsname)); cell = strchr(afsname, '@'); if (cell == NULL) { return NT_STATUS_NO_MEMORY; } *cell = '\0'; cell += 1; token = afs_createtoken_str(afsname, cell); if (token == NULL) { return NT_STATUS_OK; } resp->extra_data.data = talloc_strdup(mem_ctx, token); if (resp->extra_data.data == NULL) { return NT_STATUS_NO_MEMORY; } resp->length += strlen((const char *)resp->extra_data.data)+1; return NT_STATUS_OK; } static NTSTATUS check_info3_in_group(struct netr_SamInfo3 *info3, const char *group_sid) /** * Check whether a user belongs to a group or list of groups. * * @param mem_ctx talloc memory context. * @param info3 user information, including group membership info. * @param group_sid One or more groups , separated by commas. * * @return NT_STATUS_OK on success, * NT_STATUS_LOGON_FAILURE if the user does not belong, * or other NT_STATUS_IS_ERR(status) for other kinds of failure. */ { struct dom_sid *require_membership_of_sid; uint32_t num_require_membership_of_sid; char *req_sid; const char *p; struct dom_sid sid; size_t i; struct security_token *token; TALLOC_CTX *frame = talloc_stackframe(); NTSTATUS status; /* Parse the 'required group' SID */ if (!group_sid || !group_sid[0]) { /* NO sid supplied, all users may access */ TALLOC_FREE(frame); return NT_STATUS_OK; } token = talloc_zero(talloc_tos(), struct security_token); if (token == NULL) { DEBUG(0, ("talloc failed\n")); TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } num_require_membership_of_sid = 0; require_membership_of_sid = NULL; p = group_sid; while (next_token_talloc(talloc_tos(), &p, &req_sid, ",")) { if (!string_to_sid(&sid, req_sid)) { DEBUG(0, ("check_info3_in_group: could not parse %s " "as a SID!", req_sid)); TALLOC_FREE(frame); return NT_STATUS_INVALID_PARAMETER; } status = add_sid_to_array(talloc_tos(), &sid, &require_membership_of_sid, &num_require_membership_of_sid); if (!NT_STATUS_IS_OK(status)) { DEBUG(0, ("add_sid_to_array failed\n")); TALLOC_FREE(frame); return status; } } status = sid_array_from_info3(talloc_tos(), info3, &token->sids, &token->num_sids, true); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(frame); return status; } if (!NT_STATUS_IS_OK(status = add_aliases(get_global_sam_sid(), token)) || !NT_STATUS_IS_OK(status = add_aliases(&global_sid_Builtin, token))) { DEBUG(3, ("could not add aliases: %s\n", nt_errstr(status))); TALLOC_FREE(frame); return status; } security_token_debug(DBGC_CLASS, 10, token); for (i=0; isecure_channel_type != SEC_CHAN_NULL) { return domain; } return domain->routing_domain; } if (strequal(domain_name, get_global_sam_name())) { return find_domain_from_name_noinit(domain_name); } /* we can auth against trusted domains */ if (flags & WBFLAG_PAM_CONTACT_TRUSTDOM) { domain = find_domain_from_name_noinit(domain_name); if (domain == NULL) { DEBUG(3, ("Authentication for domain [%s] skipped " "as it is not a trusted domain\n", domain_name)); } else { return domain; } } return find_our_domain(); } static void fake_password_policy(struct winbindd_response *r, const struct netr_SamBaseInfo *bi) { NTTIME min_password_age; NTTIME max_password_age; if (bi->allow_password_change > bi->last_password_change) { min_password_age = bi->allow_password_change - bi->last_password_change; } else { min_password_age = 0; } if (bi->force_password_change > bi->last_password_change) { max_password_age = bi->force_password_change - bi->last_password_change; } else { max_password_age = 0; } r->data.auth.policy.min_length_password = 0; r->data.auth.policy.password_history = 0; r->data.auth.policy.password_properties = 0; r->data.auth.policy.expire = nt_time_to_unix_abs(&max_password_age); r->data.auth.policy.min_passwordage = nt_time_to_unix_abs(&min_password_age); } static void fill_in_password_policy(struct winbindd_response *r, const struct samr_DomInfo1 *p) { r->data.auth.policy.min_length_password = p->min_password_length; r->data.auth.policy.password_history = p->password_history_length; r->data.auth.policy.password_properties = p->password_properties; r->data.auth.policy.expire = nt_time_to_unix_abs((const NTTIME *)&(p->max_password_age)); r->data.auth.policy.min_passwordage = nt_time_to_unix_abs((const NTTIME *)&(p->min_password_age)); } static NTSTATUS fillup_password_policy(struct winbindd_domain *domain, struct winbindd_response *response) { TALLOC_CTX *frame = talloc_stackframe(); NTSTATUS status; struct samr_DomInfo1 password_policy; if ( !winbindd_can_contact_domain( domain ) ) { DEBUG(5,("fillup_password_policy: No inbound trust to " "contact domain %s\n", domain->name)); status = NT_STATUS_NOT_SUPPORTED; goto done; } status = wb_cache_password_policy(domain, talloc_tos(), &password_policy); if (NT_STATUS_IS_ERR(status)) { goto done; } fill_in_password_policy(response, &password_policy); done: TALLOC_FREE(frame); return NT_STATUS_OK; } static NTSTATUS get_max_bad_attempts_from_lockout_policy(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx, uint16_t *lockout_threshold) { NTSTATUS status = NT_STATUS_UNSUCCESSFUL; struct samr_DomInfo12 lockout_policy; *lockout_threshold = 0; status = wb_cache_lockout_policy(domain, mem_ctx, &lockout_policy); if (NT_STATUS_IS_ERR(status)) { return status; } *lockout_threshold = lockout_policy.lockout_threshold; return NT_STATUS_OK; } static NTSTATUS get_pwd_properties(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx, uint32_t *password_properties) { NTSTATUS status = NT_STATUS_UNSUCCESSFUL; struct samr_DomInfo1 password_policy; *password_properties = 0; status = wb_cache_password_policy(domain, mem_ctx, &password_policy); if (NT_STATUS_IS_ERR(status)) { return status; } *password_properties = password_policy.password_properties; return NT_STATUS_OK; } #ifdef HAVE_KRB5 static const char *generate_krb5_ccache(TALLOC_CTX *mem_ctx, const char *type, uid_t uid, const char **user_ccache_file) { /* accept FILE and WRFILE as krb5_cc_type from the client and then * build the full ccname string based on the user's uid here - * Guenther*/ const char *gen_cc = NULL; if (uid != -1) { if (strequal(type, "FILE")) { gen_cc = talloc_asprintf( mem_ctx, "FILE:/tmp/krb5cc_%d", uid); } if (strequal(type, "WRFILE")) { gen_cc = talloc_asprintf( mem_ctx, "WRFILE:/tmp/krb5cc_%d", uid); } if (strequal(type, "KEYRING")) { gen_cc = talloc_asprintf( mem_ctx, "KEYRING:persistent:%d", uid); } if (strnequal(type, "FILE:/", 6) || strnequal(type, "WRFILE:/", 8) || strnequal(type, "DIR:/", 5)) { /* we allow only one "%u" substitution */ char *p; p = strchr(type, '%'); if (p != NULL) { p++; if (p != NULL && *p == 'u' && strchr(p, '%') == NULL) { char uid_str[sizeof("18446744073709551615")]; snprintf(uid_str, sizeof(uid_str), "%u", uid); gen_cc = talloc_string_sub2(mem_ctx, type, "%u", uid_str, /* remove_unsafe_characters */ false, /* replace_once */ true, /* allow_trailing_dollar */ false); } } } } *user_ccache_file = gen_cc; if (gen_cc == NULL) { gen_cc = talloc_strdup(mem_ctx, "MEMORY:winbindd_pam_ccache"); } if (gen_cc == NULL) { DEBUG(0,("out of memory\n")); return NULL; } DEBUG(10, ("using ccache: %s%s\n", gen_cc, (*user_ccache_file == NULL) ? " (internal)":"")); return gen_cc; } #endif uid_t get_uid_from_request(struct winbindd_request *request) { uid_t uid; uid = request->data.auth.uid; if (uid == (uid_t)-1) { DEBUG(1,("invalid uid: '%u'\n", (unsigned int)uid)); return -1; } return uid; } /********************************************************************** Authenticate a user with a clear text password using Kerberos and fill up ccache if required **********************************************************************/ static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain, const char *user, const char *pass, const char *krb5_cc_type, uid_t uid, struct netr_SamInfo6 **info6, fstring krb5ccname) { #ifdef HAVE_KRB5 NTSTATUS result = NT_STATUS_UNSUCCESSFUL; krb5_error_code krb5_ret; const char *cc = NULL; const char *principal_s = NULL; const char *service = NULL; char *realm = NULL; fstring name_namespace, name_domain, name_user; time_t ticket_lifetime = 0; time_t renewal_until = 0; ADS_STRUCT *ads; time_t time_offset = 0; const char *user_ccache_file; struct PAC_LOGON_INFO *logon_info = NULL; struct PAC_UPN_DNS_INFO *upn_dns_info = NULL; struct PAC_DATA *pac_data = NULL; struct PAC_DATA_CTR *pac_data_ctr = NULL; const char *local_service; uint32_t i; struct netr_SamInfo6 *info6_copy = NULL; bool ok; *info6 = NULL; if (domain->alt_name == NULL) { return NT_STATUS_INVALID_PARAMETER; } /* 1st step: * prepare a krb5_cc_cache string for the user */ if (uid == -1) { DEBUG(0,("no valid uid\n")); } cc = generate_krb5_ccache(mem_ctx, krb5_cc_type, uid, &user_ccache_file); if (cc == NULL) { return NT_STATUS_NO_MEMORY; } /* 2nd step: * get kerberos properties */ if (domain->private_data) { ads = (ADS_STRUCT *)domain->private_data; time_offset = ads->auth.time_offset; } /* 3rd step: * do kerberos auth and setup ccache as the user */ ok = parse_domain_user(user, name_namespace, name_domain, name_user); if (!ok) { return NT_STATUS_INVALID_PARAMETER; } realm = talloc_strdup(mem_ctx, domain->alt_name); if (realm == NULL) { return NT_STATUS_NO_MEMORY; } if (!strupper_m(realm)) { return NT_STATUS_INVALID_PARAMETER; } principal_s = talloc_asprintf(mem_ctx, "%s@%s", name_user, realm); if (principal_s == NULL) { return NT_STATUS_NO_MEMORY; } service = talloc_asprintf(mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm); if (service == NULL) { return NT_STATUS_NO_MEMORY; } local_service = talloc_asprintf(mem_ctx, "%s$@%s", lp_netbios_name(), lp_realm()); if (local_service == NULL) { return NT_STATUS_NO_MEMORY; } /* if this is a user ccache, we need to act as the user to let the krb5 * library handle the chown, etc. */ /************************ ENTERING NON-ROOT **********************/ if (user_ccache_file != NULL) { set_effective_uid(uid); DEBUG(10,("winbindd_raw_kerberos_login: uid is %d\n", uid)); } result = kerberos_return_pac(mem_ctx, principal_s, pass, time_offset, &ticket_lifetime, &renewal_until, cc, true, true, WINBINDD_PAM_AUTH_KRB5_RENEW_TIME, NULL, local_service, &pac_data_ctr); if (user_ccache_file != NULL) { gain_root_privilege(); } /************************ RETURNED TO ROOT **********************/ if (!NT_STATUS_IS_OK(result)) { goto failed; } if (pac_data_ctr == NULL) { goto failed; } pac_data = pac_data_ctr->pac_data; if (pac_data == NULL) { goto failed; } for (i=0; i < pac_data->num_buffers; i++) { if (pac_data->buffers[i].type == PAC_TYPE_LOGON_INFO) { logon_info = pac_data->buffers[i].info->logon_info.info; continue; } if (pac_data->buffers[i].type == PAC_TYPE_UPN_DNS_INFO) { upn_dns_info = &pac_data->buffers[i].info->upn_dns_info; continue; } } if (logon_info == NULL) { DEBUG(10,("Missing logon_info in ticket of %s\n", principal_s)); return NT_STATUS_INVALID_PARAMETER; } DEBUG(10,("winbindd_raw_kerberos_login: winbindd validated ticket of %s\n", principal_s)); result = create_info6_from_pac(mem_ctx, logon_info, upn_dns_info, &info6_copy); if (!NT_STATUS_IS_OK(result)) { goto failed; } /* if we had a user's ccache then return that string for the pam * environment */ if (user_ccache_file != NULL) { fstrcpy(krb5ccname, user_ccache_file); result = add_ccache_to_list(principal_s, cc, service, user, pass, realm, uid, time(NULL), ticket_lifetime, renewal_until, false); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_raw_kerberos_login: failed to add ccache to list: %s\n", nt_errstr(result))); } } else { /* need to delete the memory cred cache, it is not used anymore */ krb5_ret = ads_kdestroy(cc); if (krb5_ret) { DEBUG(3,("winbindd_raw_kerberos_login: " "could not destroy krb5 credential cache: " "%s\n", error_message(krb5_ret))); } } *info6 = info6_copy; return NT_STATUS_OK; failed: /* * Do not delete an existing valid credential cache, if the user * e.g. enters a wrong password */ if ((strequal(krb5_cc_type, "FILE") || strequal(krb5_cc_type, "WRFILE")) && user_ccache_file != NULL) { return result; } /* we could have created a new credential cache with a valid tgt in it * but we werent able to get or verify the service ticket for this * local host and therefor didn't get the PAC, we need to remove that * cache entirely now */ krb5_ret = ads_kdestroy(cc); if (krb5_ret) { DEBUG(3,("winbindd_raw_kerberos_login: " "could not destroy krb5 credential cache: " "%s\n", error_message(krb5_ret))); } if (!NT_STATUS_IS_OK(remove_ccache(user))) { DEBUG(3,("winbindd_raw_kerberos_login: " "could not remove ccache for user %s\n", user)); } return result; #else return NT_STATUS_NOT_SUPPORTED; #endif /* HAVE_KRB5 */ } /**************************************************************** ****************************************************************/ bool check_request_flags(uint32_t flags) { uint32_t flags_edata = WBFLAG_PAM_AFS_TOKEN | WBFLAG_PAM_INFO3_TEXT | WBFLAG_PAM_INFO3_NDR; if ( ( (flags & flags_edata) == WBFLAG_PAM_AFS_TOKEN) || ( (flags & flags_edata) == WBFLAG_PAM_INFO3_NDR) || ( (flags & flags_edata) == WBFLAG_PAM_INFO3_TEXT)|| !(flags & flags_edata) ) { return true; } DEBUG(1, ("check_request_flags: invalid request flags[0x%08X]\n", flags)); return false; } /**************************************************************** ****************************************************************/ NTSTATUS append_auth_data(TALLOC_CTX *mem_ctx, struct winbindd_response *resp, uint32_t request_flags, uint16_t validation_level, union netr_Validation *validation, const char *name_domain, const char *name_user) { struct netr_SamInfo3 *info3 = NULL; NTSTATUS result = NT_STATUS_UNSUCCESSFUL; result = map_validation_to_info3(talloc_tos(), validation_level, validation, &info3); if (!NT_STATUS_IS_OK(result)) { goto out; } if (request_flags & WBFLAG_PAM_USER_SESSION_KEY) { memcpy(resp->data.auth.user_session_key, info3->base.key.key, sizeof(resp->data.auth.user_session_key) /* 16 */); } if (request_flags & WBFLAG_PAM_LMKEY) { memcpy(resp->data.auth.first_8_lm_hash, info3->base.LMSessKey.key, sizeof(resp->data.auth.first_8_lm_hash) /* 8 */); } if (request_flags & WBFLAG_PAM_UNIX_NAME) { result = append_unix_username(mem_ctx, resp, info3, name_domain, name_user); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to append Unix Username: %s\n", nt_errstr(result))); goto out; } } /* currently, anything from here on potentially overwrites extra_data. */ if (request_flags & WBFLAG_PAM_INFO3_NDR) { result = append_info3_as_ndr(mem_ctx, resp, info3); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to append INFO3 (NDR): %s\n", nt_errstr(result))); goto out; } } if (request_flags & WBFLAG_PAM_INFO3_TEXT) { result = append_info3_as_txt(mem_ctx, resp, validation_level, validation); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to append INFO3 (TXT): %s\n", nt_errstr(result))); goto out; } } if (request_flags & WBFLAG_PAM_AFS_TOKEN) { result = append_afs_token(mem_ctx, resp, info3, name_domain, name_user); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to append AFS token: %s\n", nt_errstr(result))); goto out; } } result = NT_STATUS_OK; out: TALLOC_FREE(info3); return result; } static NTSTATUS winbindd_dual_pam_auth_cached(struct winbindd_domain *domain, struct winbindd_cli_state *state, struct netr_SamInfo3 **info3) { NTSTATUS result = NT_STATUS_LOGON_FAILURE; uint16_t max_allowed_bad_attempts; fstring name_namespace, name_domain, name_user; struct dom_sid sid; enum lsa_SidType type; uchar new_nt_pass[NT_HASH_LEN]; const uint8_t *cached_nt_pass; const uint8_t *cached_salt; struct netr_SamInfo3 *my_info3; time_t kickoff_time, must_change_time; bool password_good = false; bool ok; #ifdef HAVE_KRB5 struct winbindd_tdc_domain *tdc_domain = NULL; #endif *info3 = NULL; ZERO_STRUCTP(info3); DEBUG(10,("winbindd_dual_pam_auth_cached\n")); /* Parse domain and username */ ok = parse_domain_user(state->request->data.auth.user, name_namespace, name_domain, name_user); if (!ok) { DBG_DEBUG("parse_domain_user failed\n"); return NT_STATUS_NO_SUCH_USER; } if (!lookup_cached_name(name_namespace, name_domain, name_user, &sid, &type)) { DEBUG(10,("winbindd_dual_pam_auth_cached: no such user in the cache\n")); return NT_STATUS_NO_SUCH_USER; } if (type != SID_NAME_USER) { DEBUG(10,("winbindd_dual_pam_auth_cached: not a user (%s)\n", sid_type_lookup(type))); return NT_STATUS_LOGON_FAILURE; } result = winbindd_get_creds(domain, state->mem_ctx, &sid, &my_info3, &cached_nt_pass, &cached_salt); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get creds: %s\n", nt_errstr(result))); return result; } *info3 = my_info3; E_md4hash(state->request->data.auth.pass, new_nt_pass); dump_data_pw("new_nt_pass", new_nt_pass, NT_HASH_LEN); dump_data_pw("cached_nt_pass", cached_nt_pass, NT_HASH_LEN); if (cached_salt) { dump_data_pw("cached_salt", cached_salt, NT_HASH_LEN); } if (cached_salt) { /* In this case we didn't store the nt_hash itself, but the MD5 combination of salt + nt_hash. */ uchar salted_hash[NT_HASH_LEN]; E_md5hash(cached_salt, new_nt_pass, salted_hash); password_good = (memcmp(cached_nt_pass, salted_hash, NT_HASH_LEN) == 0); } else { /* Old cached cred - direct store of nt_hash (bad bad bad !). */ password_good = (memcmp(cached_nt_pass, new_nt_pass, NT_HASH_LEN) == 0); } if (password_good) { /* User *DOES* know the password, update logon_time and reset * bad_pw_count */ my_info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT; if (my_info3->base.acct_flags & ACB_AUTOLOCK) { return NT_STATUS_ACCOUNT_LOCKED_OUT; } if (my_info3->base.acct_flags & ACB_DISABLED) { return NT_STATUS_ACCOUNT_DISABLED; } if (my_info3->base.acct_flags & ACB_WSTRUST) { return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT; } if (my_info3->base.acct_flags & ACB_SVRTRUST) { return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT; } if (my_info3->base.acct_flags & ACB_DOMTRUST) { return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT; } if (!(my_info3->base.acct_flags & ACB_NORMAL)) { DEBUG(0,("winbindd_dual_pam_auth_cached: whats wrong with that one?: 0x%08x\n", my_info3->base.acct_flags)); return NT_STATUS_LOGON_FAILURE; } kickoff_time = nt_time_to_unix(my_info3->base.kickoff_time); if (kickoff_time != 0 && time(NULL) > kickoff_time) { return NT_STATUS_ACCOUNT_EXPIRED; } must_change_time = nt_time_to_unix(my_info3->base.force_password_change); if (must_change_time != 0 && must_change_time < time(NULL)) { /* we allow grace logons when the password has expired */ my_info3->base.user_flags |= NETLOGON_GRACE_LOGON; /* return NT_STATUS_PASSWORD_EXPIRED; */ goto success; } #ifdef HAVE_KRB5 if ((state->request->flags & WBFLAG_PAM_KRB5) && ((tdc_domain = wcache_tdc_fetch_domain(state->mem_ctx, name_domain)) != NULL) && ((tdc_domain->trust_type & LSA_TRUST_TYPE_UPLEVEL) || /* used to cope with the case winbindd starting without network. */ !strequal(tdc_domain->domain_name, tdc_domain->dns_name))) { uid_t uid = -1; const char *cc = NULL; char *realm = NULL; const char *principal_s = NULL; const char *service = NULL; const char *user_ccache_file; if (domain->alt_name == NULL) { return NT_STATUS_INVALID_PARAMETER; } uid = get_uid_from_request(state->request); if (uid == -1) { DEBUG(0,("winbindd_dual_pam_auth_cached: invalid uid\n")); return NT_STATUS_INVALID_PARAMETER; } cc = generate_krb5_ccache(state->mem_ctx, state->request->data.auth.krb5_cc_type, state->request->data.auth.uid, &user_ccache_file); if (cc == NULL) { return NT_STATUS_NO_MEMORY; } realm = talloc_strdup(state->mem_ctx, domain->alt_name); if (realm == NULL) { return NT_STATUS_NO_MEMORY; } if (!strupper_m(realm)) { return NT_STATUS_INVALID_PARAMETER; } principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm); if (principal_s == NULL) { return NT_STATUS_NO_MEMORY; } service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm); if (service == NULL) { return NT_STATUS_NO_MEMORY; } if (user_ccache_file != NULL) { fstrcpy(state->response->data.auth.krb5ccname, user_ccache_file); result = add_ccache_to_list(principal_s, cc, service, state->request->data.auth.user, state->request->data.auth.pass, realm, uid, time(NULL), time(NULL) + lp_winbind_cache_time(), time(NULL) + WINBINDD_PAM_AUTH_KRB5_RENEW_TIME, true); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_cached: failed " "to add ccache to list: %s\n", nt_errstr(result))); } } } #endif /* HAVE_KRB5 */ success: /* FIXME: we possibly should handle logon hours as well (does xp when * offline?) see auth/auth_sam.c:sam_account_ok for details */ unix_to_nt_time(&my_info3->base.logon_time, time(NULL)); my_info3->base.bad_password_count = 0; result = winbindd_update_creds_by_info3(domain, state->request->data.auth.user, state->request->data.auth.pass, my_info3); if (!NT_STATUS_IS_OK(result)) { DEBUG(1,("winbindd_dual_pam_auth_cached: failed to update creds: %s\n", nt_errstr(result))); return result; } return NT_STATUS_OK; } /* User does *NOT* know the correct password, modify info3 accordingly, but only if online */ if (domain->online == false) { goto failed; } /* failure of this is not critical */ result = get_max_bad_attempts_from_lockout_policy(domain, state->mem_ctx, &max_allowed_bad_attempts); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get max_allowed_bad_attempts. " "Won't be able to honour account lockout policies\n")); } /* increase counter */ my_info3->base.bad_password_count++; if (max_allowed_bad_attempts == 0) { goto failed; } /* lockout user */ if (my_info3->base.bad_password_count >= max_allowed_bad_attempts) { uint32_t password_properties; result = get_pwd_properties(domain, state->mem_ctx, &password_properties); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get password properties.\n")); } if ((my_info3->base.rid != DOMAIN_RID_ADMINISTRATOR) || (password_properties & DOMAIN_PASSWORD_LOCKOUT_ADMINS)) { my_info3->base.acct_flags |= ACB_AUTOLOCK; } } failed: result = winbindd_update_creds_by_info3(domain, state->request->data.auth.user, NULL, my_info3); if (!NT_STATUS_IS_OK(result)) { DEBUG(0,("winbindd_dual_pam_auth_cached: failed to update creds %s\n", nt_errstr(result))); } return NT_STATUS_LOGON_FAILURE; } static NTSTATUS winbindd_dual_pam_auth_kerberos(struct winbindd_domain *domain, struct winbindd_cli_state *state, struct netr_SamInfo6 **info6) { struct winbindd_domain *contact_domain; fstring name_namespace, name_domain, name_user; NTSTATUS result; bool ok; DEBUG(10,("winbindd_dual_pam_auth_kerberos\n")); /* Parse domain and username */ ok = parse_domain_user(state->request->data.auth.user, name_namespace, name_domain, name_user); if (!ok) { result = NT_STATUS_INVALID_PARAMETER; goto done; } /* what domain should we contact? */ if ( IS_DC ) { contact_domain = find_domain_from_name(name_namespace); if (contact_domain == NULL) { DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n", state->request->data.auth.user, name_domain, name_user, name_domain)); result = NT_STATUS_NO_SUCH_USER; goto done; } } else { if (is_myname(name_domain)) { DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain)); result = NT_STATUS_NO_SUCH_USER; goto done; } contact_domain = find_domain_from_name(name_namespace); if (contact_domain == NULL) { DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n", state->request->data.auth.user, name_domain, name_user, name_domain)); result = NT_STATUS_NO_SUCH_USER; goto done; } } if (contact_domain->initialized && contact_domain->active_directory) { goto try_login; } if (!contact_domain->initialized) { init_dc_connection(contact_domain, false); } if (!contact_domain->active_directory) { DEBUG(3,("krb5 auth requested but domain is not Active Directory\n")); return NT_STATUS_INVALID_LOGON_TYPE; } try_login: result = winbindd_raw_kerberos_login( state->mem_ctx, contact_domain, state->request->data.auth.user, state->request->data.auth.pass, state->request->data.auth.krb5_cc_type, get_uid_from_request(state->request), info6, state->response->data.auth.krb5ccname); done: return result; } static NTSTATUS winbindd_dual_auth_passdb(TALLOC_CTX *mem_ctx, uint32_t logon_parameters, const char *domain, const char *user, const DATA_BLOB *challenge, const DATA_BLOB *lm_resp, const DATA_BLOB *nt_resp, bool interactive, uint8_t *pauthoritative, struct netr_SamInfo3 **pinfo3) { struct auth_context *auth_context; struct auth_serversupplied_info *server_info; struct auth_usersupplied_info *user_info = NULL; struct tsocket_address *local; struct netr_SamInfo3 *info3; NTSTATUS status; bool ok; int rc; TALLOC_CTX *frame = talloc_stackframe(); /* * We are authoritative by default */ *pauthoritative = 1; rc = tsocket_address_inet_from_strings(frame, "ip", "127.0.0.1", 0, &local); if (rc < 0) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } /* * TODO: We should get the service description passed in from * the winbind client, so we can have "smb2", "squid" or "samr" logged * here. */ status = make_user_info(frame, &user_info, user, user, domain, domain, lp_netbios_name(), local, local, "winbind", lm_resp, nt_resp, NULL, NULL, NULL, AUTH_PASSWORD_RESPONSE); if (!NT_STATUS_IS_OK(status)) { DEBUG(10, ("make_user_info failed: %s\n", nt_errstr(status))); TALLOC_FREE(frame); return status; } user_info->logon_parameters = logon_parameters; /* We don't want any more mapping of the username */ user_info->mapped_state = True; /* We don't want to come back to winbindd or to do PAM account checks */ user_info->flags |= USER_INFO_INFO3_AND_NO_AUTHZ; if (interactive) { user_info->flags |= USER_INFO_INTERACTIVE_LOGON; } status = make_auth3_context_for_winbind(frame, &auth_context); if (!NT_STATUS_IS_OK(status)) { DBG_ERR("make_auth3_context_for_winbind failed: %s\n", nt_errstr(status)); TALLOC_FREE(frame); return status; } ok = auth3_context_set_challenge(auth_context, challenge->data, "fixed"); if (!ok) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } status = auth_check_ntlm_password(mem_ctx, auth_context, user_info, &server_info, pauthoritative); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(frame); return status; } info3 = talloc_zero(mem_ctx, struct netr_SamInfo3); if (info3 == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } status = serverinfo_to_SamInfo3(server_info, info3); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(frame); TALLOC_FREE(info3); DEBUG(0, ("serverinfo_to_SamInfo3 failed: %s\n", nt_errstr(status))); return status; } *pinfo3 = info3; DEBUG(10, ("Authenticaticating user %s\\%s returned %s\n", domain, user, nt_errstr(status))); TALLOC_FREE(frame); return status; } static NTSTATUS winbind_samlogon_retry_loop(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx, uint32_t logon_parameters, const char *username, const char *password, const char *domainname, const char *workstation, bool plaintext_given, const uint8_t chal[8], DATA_BLOB lm_response, DATA_BLOB nt_response, bool interactive, uint8_t *authoritative, uint32_t *flags, uint16_t *_validation_level, union netr_Validation **_validation) { int attempts = 0; int netr_attempts = 0; bool retry = false; NTSTATUS result; enum netr_LogonInfoClass logon_type_i; enum netr_LogonInfoClass logon_type_n; uint16_t validation_level = UINT16_MAX; union netr_Validation *validation = NULL; do { struct rpc_pipe_client *netlogon_pipe; struct netlogon_creds_cli_context *netlogon_creds_ctx = NULL; retry = false; result = cm_connect_netlogon_secure(domain, &netlogon_pipe, &netlogon_creds_ctx); if (NT_STATUS_EQUAL(result, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) { /* * This means we don't have a trust account. */ *authoritative = 0; result = NT_STATUS_NO_SUCH_USER; break; } if (!NT_STATUS_IS_OK(result)) { DEBUG(3,("Could not open handle to NETLOGON pipe " "(error: %s, attempts: %d)\n", nt_errstr(result), netr_attempts)); /* After the first retry always close the connection */ if (netr_attempts > 0) { DEBUG(3, ("This is again a problem for this " "particular call, forcing the close " "of this connection\n")); invalidate_cm_connection(domain); } /* After the second retry failover to the next DC */ if (netr_attempts > 1) { /* * If the netlogon server is not reachable then * it is possible that the DC is rebuilding * sysvol and shutdown netlogon for that time. * We should failover to the next dc. */ DEBUG(3, ("This is the third problem for this " "particular call, adding DC to the " "negative cache list: %s %s\n", domain->name, domain->dcname)); add_failed_connection_entry(domain->name, domain->dcname, result); saf_delete(domain->name); } /* Only allow 3 retries */ if (netr_attempts < 3) { DEBUG(3, ("The connection to netlogon " "failed, retrying\n")); netr_attempts++; retry = true; continue; } return result; } logon_type_i = NetlogonInteractiveInformation; logon_type_n = NetlogonNetworkInformation; if (domain->domain_trust_attribs & LSA_TRUST_ATTRIBUTE_WITHIN_FOREST) { logon_type_i = NetlogonInteractiveTransitiveInformation; logon_type_n = NetlogonNetworkTransitiveInformation; } if (domain->domain_trust_attribs & LSA_TRUST_ATTRIBUTE_FOREST_TRANSITIVE) { logon_type_i = NetlogonInteractiveTransitiveInformation; logon_type_n = NetlogonNetworkTransitiveInformation; } if (domain->domain_trust_attribs & LSA_TRUST_ATTRIBUTE_NON_TRANSITIVE) { logon_type_i = NetlogonInteractiveInformation; logon_type_n = NetlogonNetworkInformation; } if (domain->domain_trust_attribs & LSA_TRUST_ATTRIBUTE_QUARANTINED_DOMAIN) { logon_type_i = NetlogonInteractiveInformation; logon_type_n = NetlogonNetworkInformation; } netr_attempts = 0; if (plaintext_given) { result = rpccli_netlogon_password_logon( netlogon_creds_ctx, netlogon_pipe->binding_handle, mem_ctx, logon_parameters, domainname, username, password, workstation, logon_type_i, authoritative, flags, &validation_level, &validation); } else if (interactive) { result = rpccli_netlogon_interactive_logon( netlogon_creds_ctx, netlogon_pipe->binding_handle, mem_ctx, logon_parameters, username, domainname, workstation, lm_response, nt_response, logon_type_i, authoritative, flags, &validation_level, &validation); } else { result = rpccli_netlogon_network_logon( netlogon_creds_ctx, netlogon_pipe->binding_handle, mem_ctx, logon_parameters, username, domainname, workstation, chal, lm_response, nt_response, logon_type_n, authoritative, flags, &validation_level, &validation); } /* * we increment this after the "feature negotiation" * for can_do_samlogon_ex and can_do_validation6 */ attempts += 1; /* We have to try a second time as cm_connect_netlogon might not yet have noticed that the DC has killed our connection. */ if (!rpccli_is_connected(netlogon_pipe)) { retry = true; continue; } /* if we get access denied, a possible cause was that we had and open connection to the DC, but someone changed our machine account password out from underneath us using 'net rpc changetrustpw' */ if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) { DEBUG(1,("winbind_samlogon_retry_loop: sam_logon returned " "ACCESS_DENIED. Maybe the DC has Restrict " "NTLM set or the trust account " "password was changed and we didn't know it. " "Killing connections to domain %s\n", domainname)); invalidate_cm_connection(domain); retry = true; } if (NT_STATUS_EQUAL(result, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE)) { /* * Got DCERPC_FAULT_OP_RNG_ERROR for SamLogon * (no Ex). This happens against old Samba * DCs, if LogonSamLogonEx() fails with an error * e.g. NT_STATUS_NO_SUCH_USER or NT_STATUS_WRONG_PASSWORD. * * The server will log something like this: * api_net_sam_logon_ex: Failed to marshall NET_R_SAM_LOGON_EX. * * This sets the whole connection into a fault_state mode * and all following request get NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE. * * This also happens to our retry with LogonSamLogonWithFlags() * and LogonSamLogon(). * * In order to recover from this situation, we need to * drop the connection. */ invalidate_cm_connection(domain); result = NT_STATUS_LOGON_FAILURE; break; } } while ( (attempts < 2) && retry ); if (NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT)) { DEBUG(3,("winbind_samlogon_retry_loop: sam_network_logon(ex) " "returned NT_STATUS_IO_TIMEOUT after the retry. " "Killing connections to domain %s\n", domainname)); invalidate_cm_connection(domain); } if (!NT_STATUS_IS_OK(result)) { return result; } *_validation_level = validation_level; *_validation = validation; return NT_STATUS_OK; } static NTSTATUS winbindd_dual_pam_auth_samlogon( TALLOC_CTX *mem_ctx, struct winbindd_domain *domain, const char *user, const char *pass, uint32_t request_flags, uint16_t *_validation_level, union netr_Validation **_validation) { uchar chal[8]; DATA_BLOB lm_resp; DATA_BLOB nt_resp; unsigned char local_nt_response[24]; fstring name_namespace, name_domain, name_user; NTSTATUS result; uint8_t authoritative = 0; uint32_t flags = 0; uint16_t validation_level; union netr_Validation *validation = NULL; struct netr_SamBaseInfo *base_info = NULL; bool ok; DEBUG(10,("winbindd_dual_pam_auth_samlogon\n")); /* Parse domain and username */ ok = parse_domain_user(user, name_namespace, name_domain, name_user); if (!ok) { return NT_STATUS_INVALID_PARAMETER; } /* * We check against domain->name instead of * name_domain, as find_auth_domain() -> * find_domain_from_name_noinit() already decided * that we are in a child for the correct domain. * * name_domain can also be lp_realm() * we need to check against domain->name. */ if (strequal(domain->name, get_global_sam_name())) { DATA_BLOB chal_blob = data_blob_const(chal, sizeof(chal)); struct netr_SamInfo3 *info3 = NULL; /* do password magic */ generate_random_buffer(chal, sizeof(chal)); if (lp_client_ntlmv2_auth()) { DATA_BLOB server_chal; DATA_BLOB names_blob; server_chal = data_blob_const(chal, 8); /* note that the 'workgroup' here is for the local machine. The 'server name' must match the 'workstation' passed to the actual SamLogon call. */ names_blob = NTLMv2_generate_names_blob( mem_ctx, lp_netbios_name(), lp_workgroup()); if (!SMBNTLMv2encrypt(mem_ctx, name_user, name_domain, pass, &server_chal, &names_blob, &lm_resp, &nt_resp, NULL, NULL)) { data_blob_free(&names_blob); DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n")); result = NT_STATUS_NO_MEMORY; goto done; } data_blob_free(&names_blob); } else { lm_resp = data_blob_null; SMBNTencrypt(pass, chal, local_nt_response); nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response)); } result = winbindd_dual_auth_passdb( talloc_tos(), 0, name_domain, name_user, &chal_blob, &lm_resp, &nt_resp, true, /* interactive */ &authoritative, &info3); /* * We need to try the remote NETLOGON server if this is * not authoritative (for example on the RODC). */ if (authoritative != 0) { if (NT_STATUS_IS_OK(result)) { result = map_info3_to_validation( mem_ctx, info3, &validation_level, &validation); TALLOC_FREE(info3); if (!NT_STATUS_IS_OK(result)) { goto done; } } goto done; } } /* check authentication loop */ result = winbind_samlogon_retry_loop(domain, mem_ctx, 0, name_user, pass, name_domain, lp_netbios_name(), true, /* plaintext_given */ NULL, data_blob_null, data_blob_null, true, /* interactive */ &authoritative, &flags, &validation_level, &validation); if (!NT_STATUS_IS_OK(result)) { goto done; } /* handle the case where a NT4 DC does not fill in the acct_flags in * the samlogon reply info3. When accurate info3 is required by the * caller, we look up the account flags ourselves - gd */ switch (validation_level) { case 3: base_info = &validation->sam3->base; break; case 6: base_info = &validation->sam6->base; break; default: DBG_ERR("Bad validation level %d", (int)validation_level); result = NT_STATUS_INTERNAL_ERROR; goto done; } if ((request_flags & WBFLAG_PAM_INFO3_TEXT) && (base_info->acct_flags == 0)) { struct rpc_pipe_client *samr_pipe; struct policy_handle samr_domain_handle, user_pol; union samr_UserInfo *info = NULL; NTSTATUS status_tmp, result_tmp; uint32_t acct_flags; struct dcerpc_binding_handle *b; status_tmp = cm_connect_sam(domain, mem_ctx, false, &samr_pipe, &samr_domain_handle); if (!NT_STATUS_IS_OK(status_tmp)) { DEBUG(3, ("could not open handle to SAMR pipe: %s\n", nt_errstr(status_tmp))); goto done; } b = samr_pipe->binding_handle; status_tmp = dcerpc_samr_OpenUser(b, mem_ctx, &samr_domain_handle, MAXIMUM_ALLOWED_ACCESS, base_info->rid, &user_pol, &result_tmp); if (!NT_STATUS_IS_OK(status_tmp)) { DEBUG(3, ("could not open user handle on SAMR pipe: %s\n", nt_errstr(status_tmp))); goto done; } if (!NT_STATUS_IS_OK(result_tmp)) { DEBUG(3, ("could not open user handle on SAMR pipe: %s\n", nt_errstr(result_tmp))); goto done; } status_tmp = dcerpc_samr_QueryUserInfo(b, mem_ctx, &user_pol, 16, &info, &result_tmp); if (any_nt_status_not_ok(status_tmp, result_tmp, &status_tmp)) { DEBUG(3, ("could not query user info on SAMR pipe: %s\n", nt_errstr(status_tmp))); dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp); goto done; } acct_flags = info->info16.acct_flags; if (acct_flags == 0) { dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp); goto done; } base_info->acct_flags = acct_flags; DEBUG(10,("successfully retrieved acct_flags 0x%x\n", acct_flags)); dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp); } done: if (NT_STATUS_IS_OK(result)) { *_validation_level = validation_level; *_validation = validation; } return result; } enum winbindd_result winbindd_dual_pam_auth(struct winbindd_domain *domain, struct winbindd_cli_state *state) { NTSTATUS result = NT_STATUS_LOGON_FAILURE; NTSTATUS krb5_result = NT_STATUS_OK; fstring name_namespace, name_domain, name_user; char *mapped_user; fstring domain_user; uint16_t validation_level = UINT16_MAX; union netr_Validation *validation = NULL; NTSTATUS name_map_status = NT_STATUS_UNSUCCESSFUL; bool ok; /* Ensure null termination */ state->request->data.auth.user[sizeof(state->request->data.auth.user)-1]='\0'; /* Ensure null termination */ state->request->data.auth.pass[sizeof(state->request->data.auth.pass)-1]='\0'; DEBUG(3, ("[%5lu]: dual pam auth %s\n", (unsigned long)state->pid, state->request->data.auth.user)); /* Parse domain and username */ name_map_status = normalize_name_unmap(state->mem_ctx, state->request->data.auth.user, &mapped_user); /* If the name normalization didnt' actually do anything, just use the original name */ if (!NT_STATUS_IS_OK(name_map_status) && !NT_STATUS_EQUAL(name_map_status, NT_STATUS_FILE_RENAMED)) { mapped_user = state->request->data.auth.user; } ok = parse_domain_user(mapped_user, name_namespace, name_domain, name_user); if (!ok) { result = NT_STATUS_INVALID_PARAMETER; goto process_result; } if ( mapped_user != state->request->data.auth.user ) { fstr_sprintf( domain_user, "%s%c%s", name_domain, *lp_winbind_separator(), name_user ); strlcpy( state->request->data.auth.user, domain_user, sizeof(state->request->data.auth.user)); } if (!domain->online) { result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND; if (domain->startup) { /* Logons are very important to users. If we're offline and we get a request within the first 30 seconds of startup, try very hard to find a DC and go online. */ DEBUG(10,("winbindd_dual_pam_auth: domain: %s offline and auth " "request in startup mode.\n", domain->name )); winbindd_flush_negative_conn_cache(domain); result = init_dc_connection(domain, false); } } DEBUG(10,("winbindd_dual_pam_auth: domain: %s last was %s\n", domain->name, domain->online ? "online":"offline")); /* Check for Kerberos authentication */ if (domain->online && (state->request->flags & WBFLAG_PAM_KRB5)) { struct netr_SamInfo6 *info6 = NULL; result = winbindd_dual_pam_auth_kerberos(domain, state, &info6); /* save for later */ krb5_result = result; if (NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_kerberos succeeded\n")); result = map_info6_to_validation(state->mem_ctx, info6, &validation_level, &validation); TALLOC_FREE(info6); if (!NT_STATUS_IS_OK(result)) { DBG_ERR("map_info6_to_validation failed\n"); goto done; } goto process_result; } DBG_DEBUG("winbindd_dual_pam_auth_kerberos failed: %s\n", nt_errstr(result)); if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) || NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) || NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) { DEBUG(10,("winbindd_dual_pam_auth_kerberos setting domain to offline\n")); set_domain_offline( domain ); goto cached_logon; } /* there are quite some NT_STATUS errors where there is no * point in retrying with a samlogon, we explictly have to take * care not to increase the bad logon counter on the DC */ if (NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_DISABLED) || NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_EXPIRED) || NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_LOCKED_OUT) || NT_STATUS_EQUAL(result, NT_STATUS_INVALID_LOGON_HOURS) || NT_STATUS_EQUAL(result, NT_STATUS_INVALID_WORKSTATION) || NT_STATUS_EQUAL(result, NT_STATUS_LOGON_FAILURE) || NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER) || NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED) || NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) || NT_STATUS_EQUAL(result, NT_STATUS_WRONG_PASSWORD)) { goto done; } if (state->request->flags & WBFLAG_PAM_FALLBACK_AFTER_KRB5) { DEBUG(3,("falling back to samlogon\n")); goto sam_logon; } else { goto cached_logon; } } sam_logon: /* Check for Samlogon authentication */ if (domain->online) { struct netr_SamBaseInfo *base_info = NULL; result = winbindd_dual_pam_auth_samlogon( state->mem_ctx, domain, state->request->data.auth.user, state->request->data.auth.pass, state->request->flags, &validation_level, &validation); if (NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_samlogon succeeded\n")); switch (validation_level) { case 3: base_info = &validation->sam3->base; break; case 6: base_info = &validation->sam6->base; break; default: DBG_ERR("Bad validation level %d\n", validation_level); result = NT_STATUS_INTERNAL_ERROR; goto done; } /* add the Krb5 err if we have one */ if ( NT_STATUS_EQUAL(krb5_result, NT_STATUS_TIME_DIFFERENCE_AT_DC ) ) { base_info->user_flags |= LOGON_KRB5_FAIL_CLOCK_SKEW; } goto process_result; } DEBUG(10,("winbindd_dual_pam_auth_samlogon failed: %s\n", nt_errstr(result))); if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) || NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) || NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) { DEBUG(10,("winbindd_dual_pam_auth_samlogon setting domain to offline\n")); set_domain_offline( domain ); goto cached_logon; } if (domain->online) { /* We're still online - fail. */ goto done; } } cached_logon: /* Check for Cached logons */ if (!domain->online && (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) && lp_winbind_offline_logon()) { struct netr_SamInfo3 *info3 = NULL; result = winbindd_dual_pam_auth_cached(domain, state, &info3); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_cached failed: %s\n", nt_errstr(result))); goto done; } DEBUG(10,("winbindd_dual_pam_auth_cached succeeded\n")); result = map_info3_to_validation(state->mem_ctx, info3, &validation_level, &validation); TALLOC_FREE(info3); if (!NT_STATUS_IS_OK(result)) { DBG_ERR("map_info3_to_validation failed\n"); goto done; } } process_result: if (NT_STATUS_IS_OK(result)) { struct dom_sid user_sid; TALLOC_CTX *base_ctx = NULL; struct netr_SamBaseInfo *base_info = NULL; struct netr_SamInfo3 *info3 = NULL; switch (validation_level) { case 3: base_ctx = validation->sam3; base_info = &validation->sam3->base; break; case 6: base_ctx = validation->sam6; base_info = &validation->sam6->base; break; default: result = NT_STATUS_INTERNAL_ERROR; goto done; } sid_compose(&user_sid, base_info->domain_sid, base_info->rid); if (base_info->full_name.string == NULL) { struct netr_SamInfo3 *cached_info3; cached_info3 = netsamlogon_cache_get(state->mem_ctx, &user_sid); if (cached_info3 != NULL && cached_info3->base.full_name.string != NULL) { base_info->full_name.string = talloc_strdup( base_ctx, cached_info3->base.full_name.string); if (base_info->full_name.string == NULL) { result = NT_STATUS_NO_MEMORY; goto done; } } else { /* this might fail so we don't check the return code */ wcache_query_user_fullname(domain, base_ctx, &user_sid, &base_info->full_name.string); } } result = map_validation_to_info3(talloc_tos(), validation_level, validation, &info3); if (!NT_STATUS_IS_OK(result)) { goto done; } wcache_invalidate_samlogon(find_domain_from_name(name_domain), &user_sid); netsamlogon_cache_store(name_user, info3); /* save name_to_sid info as early as possible (only if this is our primary domain so we don't invalidate the cache entry by storing the seq_num for the wrong domain). */ if ( domain->primary ) { cache_name2sid(domain, name_domain, name_user, SID_NAME_USER, &user_sid); } /* Check if the user is in the right group */ result = check_info3_in_group( info3, state->request->data.auth.require_membership_of_sid); if (!NT_STATUS_IS_OK(result)) { DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n", state->request->data.auth.user, state->request->data.auth.require_membership_of_sid)); goto done; } result = append_auth_data(state->mem_ctx, state->response, state->request->flags, validation_level, validation, name_domain, name_user); if (!NT_STATUS_IS_OK(result)) { goto done; } if ((state->request->flags & WBFLAG_PAM_CACHED_LOGIN) && lp_winbind_offline_logon()) { result = winbindd_store_creds(domain, state->request->data.auth.user, state->request->data.auth.pass, info3); } if (state->request->flags & WBFLAG_PAM_GET_PWD_POLICY) { /* * WBFLAG_PAM_GET_PWD_POLICY is not used within * any Samba caller anymore. * * We just fake this based on the effective values * for the user, for legacy callers. */ fake_password_policy(state->response, &info3->base); } result = NT_STATUS_OK; } done: /* give us a more useful (more correct?) error code */ if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) { result = NT_STATUS_NO_LOGON_SERVERS; } set_auth_errors(state->response, result); DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n", state->request->data.auth.user, state->response->data.auth.nt_status_string, state->response->data.auth.pam_error)); return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR; } NTSTATUS winbind_dual_SamLogon(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx, bool interactive, uint32_t logon_parameters, const char *name_user, const char *name_domain, const char *workstation, const uint8_t chal[8], DATA_BLOB lm_response, DATA_BLOB nt_response, uint8_t *authoritative, bool skip_sam, uint32_t *flags, uint16_t *_validation_level, union netr_Validation **_validation) { uint16_t validation_level; union netr_Validation *validation = NULL; NTSTATUS result; /* * We check against domain->name instead of * name_domain, as find_auth_domain() -> * find_domain_from_name_noinit() already decided * that we are in a child for the correct domain. * * name_domain can also be lp_realm() * we need to check against domain->name. */ if (!skip_sam && strequal(domain->name, get_global_sam_name())) { DATA_BLOB chal_blob = data_blob_const( chal, 8); struct netr_SamInfo3 *info3 = NULL; result = winbindd_dual_auth_passdb( talloc_tos(), logon_parameters, name_domain, name_user, &chal_blob, &lm_response, &nt_response, interactive, authoritative, &info3); if (NT_STATUS_IS_OK(result)) { result = map_info3_to_validation(mem_ctx, info3, &validation_level, &validation); TALLOC_FREE(info3); if (!NT_STATUS_IS_OK(result)) { goto done; } } /* * We need to try the remote NETLOGON server if this is * not authoritative. */ if (*authoritative != 0) { *flags = 0; goto process_result; } } result = winbind_samlogon_retry_loop(domain, mem_ctx, logon_parameters, name_user, NULL, /* password */ name_domain, /* Bug #3248 - found by Stefan Burkei. */ workstation, /* We carefully set this above so use it... */ false, /* plaintext_given */ chal, lm_response, nt_response, interactive, authoritative, flags, &validation_level, &validation); if (!NT_STATUS_IS_OK(result)) { goto done; } process_result: if (NT_STATUS_IS_OK(result)) { struct dom_sid user_sid; TALLOC_CTX *base_ctx = NULL; struct netr_SamBaseInfo *base_info = NULL; struct netr_SamInfo3 *info3 = NULL; switch (validation_level) { case 3: base_ctx = validation->sam3; base_info = &validation->sam3->base; break; case 6: base_ctx = validation->sam6; base_info = &validation->sam6->base; break; default: result = NT_STATUS_INTERNAL_ERROR; goto done; } sid_compose(&user_sid, base_info->domain_sid, base_info->rid); if (base_info->full_name.string == NULL) { struct netr_SamInfo3 *cached_info3; cached_info3 = netsamlogon_cache_get(mem_ctx, &user_sid); if (cached_info3 != NULL && cached_info3->base.full_name.string != NULL) { base_info->full_name.string = talloc_strdup( base_ctx, cached_info3->base.full_name.string); } else { /* this might fail so we don't check the return code */ wcache_query_user_fullname(domain, base_ctx, &user_sid, &base_info->full_name.string); } } result = map_validation_to_info3(talloc_tos(), validation_level, validation, &info3); if (!NT_STATUS_IS_OK(result)) { goto done; } wcache_invalidate_samlogon(find_domain_from_name(name_domain), &user_sid); netsamlogon_cache_store(name_user, info3); TALLOC_FREE(info3); } done: /* give us a more useful (more correct?) error code */ if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) { result = NT_STATUS_NO_LOGON_SERVERS; } DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("NTLM CRAP authentication for user [%s]\\[%s] returned %s\n", name_domain, name_user, nt_errstr(result))); if (!NT_STATUS_IS_OK(result)) { return result; } *_validation_level = validation_level; *_validation = validation; return NT_STATUS_OK; } enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain, struct winbindd_cli_state *state) { NTSTATUS result; const char *name_user = NULL; const char *name_domain = NULL; const char *workstation; uint8_t authoritative = 0; uint32_t flags = 0; uint16_t validation_level; union netr_Validation *validation = NULL; DATA_BLOB lm_resp, nt_resp; /* This is child-only, so no check for privileged access is needed anymore */ /* Ensure null termination */ state->request->data.auth_crap.user[sizeof(state->request->data.auth_crap.user)-1]=0; state->request->data.auth_crap.domain[sizeof(state->request->data.auth_crap.domain)-1]=0; name_user = state->request->data.auth_crap.user; name_domain = state->request->data.auth_crap.domain; workstation = state->request->data.auth_crap.workstation; DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid, name_domain, name_user)); if (state->request->data.auth_crap.lm_resp_len > sizeof(state->request->data.auth_crap.lm_resp) || state->request->data.auth_crap.nt_resp_len > sizeof(state->request->data.auth_crap.nt_resp)) { if (!(state->request->flags & WBFLAG_BIG_NTLMV2_BLOB) || state->request->extra_len != state->request->data.auth_crap.nt_resp_len) { DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n", state->request->data.auth_crap.lm_resp_len, state->request->data.auth_crap.nt_resp_len)); result = NT_STATUS_INVALID_PARAMETER; goto done; } } lm_resp = data_blob_talloc(state->mem_ctx, state->request->data.auth_crap.lm_resp, state->request->data.auth_crap.lm_resp_len); if (state->request->flags & WBFLAG_BIG_NTLMV2_BLOB) { nt_resp = data_blob_talloc(state->mem_ctx, state->request->extra_data.data, state->request->data.auth_crap.nt_resp_len); } else { nt_resp = data_blob_talloc(state->mem_ctx, state->request->data.auth_crap.nt_resp, state->request->data.auth_crap.nt_resp_len); } result = winbind_dual_SamLogon(domain, state->mem_ctx, false, /* interactive */ state->request->data.auth_crap.logon_parameters, name_user, name_domain, /* Bug #3248 - found by Stefan Burkei. */ workstation, /* We carefully set this above so use it... */ state->request->data.auth_crap.chal, lm_resp, nt_resp, &authoritative, false, &flags, &validation_level, &validation); if (!NT_STATUS_IS_OK(result)) { state->response->data.auth.authoritative = authoritative; goto done; } if (NT_STATUS_IS_OK(result)) { struct netr_SamInfo3 *info3 = NULL; result = map_validation_to_info3(state->mem_ctx, validation_level, validation, &info3); if (!NT_STATUS_IS_OK(result)) { goto done; } /* Check if the user is in the right group */ result = check_info3_in_group( info3, state->request->data.auth_crap.require_membership_of_sid); if (!NT_STATUS_IS_OK(result)) { DEBUG(3, ("User %s is not in the required group (%s), so " "crap authentication is rejected\n", state->request->data.auth_crap.user, state->request->data.auth_crap.require_membership_of_sid)); goto done; } result = append_auth_data(state->mem_ctx, state->response, state->request->flags, validation_level, validation, name_domain, name_user); if (!NT_STATUS_IS_OK(result)) { goto done; } } done: if (state->request->flags & WBFLAG_PAM_NT_STATUS_SQUASH) { result = nt_status_squash(result); } set_auth_errors(state->response, result); return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR; } enum winbindd_result winbindd_dual_pam_chauthtok(struct winbindd_domain *contact_domain, struct winbindd_cli_state *state) { char *oldpass; char *newpass = NULL; struct policy_handle dom_pol; struct rpc_pipe_client *cli = NULL; bool got_info = false; struct samr_DomInfo1 *info = NULL; struct userPwdChangeFailureInformation *reject = NULL; NTSTATUS result = NT_STATUS_UNSUCCESSFUL; fstring namespace, domain, user; struct dcerpc_binding_handle *b = NULL; bool ok; ZERO_STRUCT(dom_pol); DEBUG(3, ("[%5lu]: dual pam chauthtok %s\n", (unsigned long)state->pid, state->request->data.auth.user)); ok = parse_domain_user(state->request->data.chauthtok.user, namespace, domain, user); if (!ok) { goto done; } /* Change password */ oldpass = state->request->data.chauthtok.oldpass; newpass = state->request->data.chauthtok.newpass; /* Initialize reject reason */ state->response->data.auth.reject_reason = Undefined; /* Get sam handle */ result = cm_connect_sam(contact_domain, state->mem_ctx, true, &cli, &dom_pol); if (!NT_STATUS_IS_OK(result)) { DEBUG(1, ("could not get SAM handle on DC for %s\n", domain)); goto done; } b = cli->binding_handle; result = rpccli_samr_chgpasswd_user3(cli, state->mem_ctx, user, newpass, oldpass, &info, &reject); /* Windows 2003 returns NT_STATUS_PASSWORD_RESTRICTION */ if (NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_RESTRICTION) ) { fill_in_password_policy(state->response, info); state->response->data.auth.reject_reason = reject->extendedFailureReason; got_info = true; } /* atm the pidl generated rpccli_samr_ChangePasswordUser3 function will * return with NT_STATUS_BUFFER_TOO_SMALL for w2k dcs as w2k just * returns with 4byte error code (NT_STATUS_NOT_SUPPORTED) which is too * short to comply with the samr_ChangePasswordUser3 idl - gd */ /* only fallback when the chgpasswd_user3 call is not supported */ if (NT_STATUS_EQUAL(result, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE) || NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED) || NT_STATUS_EQUAL(result, NT_STATUS_BUFFER_TOO_SMALL) || NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED)) { DEBUG(10,("Password change with chgpasswd_user3 failed with: %s, retrying chgpasswd_user2\n", nt_errstr(result))); result = rpccli_samr_chgpasswd_user2(cli, state->mem_ctx, user, newpass, oldpass); /* Windows 2000 returns NT_STATUS_ACCOUNT_RESTRICTION. Map to the same status code as Windows 2003. */ if ( NT_STATUS_EQUAL(NT_STATUS_ACCOUNT_RESTRICTION, result ) ) { result = NT_STATUS_PASSWORD_RESTRICTION; } } done: if (NT_STATUS_IS_OK(result) && (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) && lp_winbind_offline_logon()) { result = winbindd_update_creds_by_name(contact_domain, user, newpass); /* Again, this happens when we login from gdm or xdm * and the password expires, *BUT* cached crendentials * doesn't exist. winbindd_update_creds_by_name() * returns NT_STATUS_NO_SUCH_USER. * This is not a failure. * --- BoYang * */ if (NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER)) { result = NT_STATUS_OK; } if (!NT_STATUS_IS_OK(result)) { DEBUG(10, ("Failed to store creds: %s\n", nt_errstr(result))); goto process_result; } } if (!NT_STATUS_IS_OK(result) && !got_info && contact_domain) { NTSTATUS policy_ret; policy_ret = fillup_password_policy( contact_domain, state->response); /* failure of this is non critical, it will just provide no * additional information to the client why the change has * failed - Guenther */ if (!NT_STATUS_IS_OK(policy_ret)) { DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(policy_ret))); goto process_result; } } process_result: if (strequal(contact_domain->name, get_global_sam_name())) { /* FIXME: internal rpc pipe does not cache handles yet */ if (b) { if (is_valid_policy_hnd(&dom_pol)) { NTSTATUS _result; dcerpc_samr_Close(b, state->mem_ctx, &dom_pol, &_result); } TALLOC_FREE(cli); } } set_auth_errors(state->response, result); DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n", domain, user, state->response->data.auth.nt_status_string, state->response->data.auth.pam_error)); return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR; } enum winbindd_result winbindd_dual_pam_logoff(struct winbindd_domain *domain, struct winbindd_cli_state *state) { NTSTATUS result = NT_STATUS_NOT_SUPPORTED; DEBUG(3, ("[%5lu]: pam dual logoff %s\n", (unsigned long)state->pid, state->request->data.logoff.user)); if (!(state->request->flags & WBFLAG_PAM_KRB5)) { result = NT_STATUS_OK; goto process_result; } if (state->request->data.logoff.krb5ccname[0] == '\0') { result = NT_STATUS_OK; goto process_result; } #ifdef HAVE_KRB5 if (state->request->data.logoff.uid == (uid_t)-1) { DEBUG(0,("winbindd_pam_logoff: invalid uid\n")); goto process_result; } /* what we need here is to find the corresponding krb5 ccache name *we* * created for a given username and destroy it */ if (!ccache_entry_exists(state->request->data.logoff.user)) { result = NT_STATUS_OK; DEBUG(10,("winbindd_pam_logoff: no entry found.\n")); goto process_result; } if (!ccache_entry_identical(state->request->data.logoff.user, state->request->data.logoff.uid, state->request->data.logoff.krb5ccname)) { DEBUG(0,("winbindd_pam_logoff: cached entry differs.\n")); goto process_result; } result = remove_ccache(state->request->data.logoff.user); if (!NT_STATUS_IS_OK(result)) { DEBUG(0,("winbindd_pam_logoff: failed to remove ccache: %s\n", nt_errstr(result))); goto process_result; } /* * Remove any mlock'ed memory creds in the child * we might be using for krb5 ticket renewal. */ winbindd_delete_memory_creds(state->request->data.logoff.user); #else result = NT_STATUS_NOT_SUPPORTED; #endif process_result: set_auth_errors(state->response, result); return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR; } /* Change user password with auth crap*/ enum winbindd_result winbindd_dual_pam_chng_pswd_auth_crap(struct winbindd_domain *domainSt, struct winbindd_cli_state *state) { NTSTATUS result; DATA_BLOB new_nt_password; DATA_BLOB old_nt_hash_enc; DATA_BLOB new_lm_password; DATA_BLOB old_lm_hash_enc; fstring namespace, domain, user; struct policy_handle dom_pol; struct winbindd_domain *contact_domain = domainSt; struct rpc_pipe_client *cli = NULL; struct dcerpc_binding_handle *b = NULL; ZERO_STRUCT(dom_pol); /* Ensure null termination */ state->request->data.chng_pswd_auth_crap.user[ sizeof(state->request->data.chng_pswd_auth_crap.user)-1]=0; state->request->data.chng_pswd_auth_crap.domain[ sizeof(state->request->data.chng_pswd_auth_crap.domain)-1]=0; domain[0] = '\0'; namespace[0] = '\0'; user[0] = '\0'; DEBUG(3, ("[%5lu]: pam change pswd auth crap domain: %s user: %s\n", (unsigned long)state->pid, state->request->data.chng_pswd_auth_crap.domain, state->request->data.chng_pswd_auth_crap.user)); if (lp_winbind_offline_logon()) { DEBUG(0,("Refusing password change as winbind offline logons are enabled. ")); DEBUGADD(0,("Changing passwords here would risk inconsistent logons\n")); result = NT_STATUS_ACCESS_DENIED; goto done; } if (*state->request->data.chng_pswd_auth_crap.domain) { fstrcpy(domain,state->request->data.chng_pswd_auth_crap.domain); } else { bool ok; ok = parse_domain_user(state->request->data.chng_pswd_auth_crap.user, namespace, domain, user); if (!ok) { result = NT_STATUS_INVALID_PARAMETER; goto done; } if(!*domain) { DEBUG(3,("no domain specified with username (%s) - " "failing auth\n", state->request->data.chng_pswd_auth_crap.user)); result = NT_STATUS_NO_SUCH_USER; goto done; } } if (!*domain && lp_winbind_use_default_domain()) { fstrcpy(domain,lp_workgroup()); } if(!*user) { fstrcpy(user, state->request->data.chng_pswd_auth_crap.user); } DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid, domain, user)); /* Change password */ new_nt_password = data_blob_const( state->request->data.chng_pswd_auth_crap.new_nt_pswd, state->request->data.chng_pswd_auth_crap.new_nt_pswd_len); old_nt_hash_enc = data_blob_const( state->request->data.chng_pswd_auth_crap.old_nt_hash_enc, state->request->data.chng_pswd_auth_crap.old_nt_hash_enc_len); if(state->request->data.chng_pswd_auth_crap.new_lm_pswd_len > 0) { new_lm_password = data_blob_const( state->request->data.chng_pswd_auth_crap.new_lm_pswd, state->request->data.chng_pswd_auth_crap.new_lm_pswd_len); old_lm_hash_enc = data_blob_const( state->request->data.chng_pswd_auth_crap.old_lm_hash_enc, state->request->data.chng_pswd_auth_crap.old_lm_hash_enc_len); } else { new_lm_password = data_blob_null; old_lm_hash_enc = data_blob_null; } /* Get sam handle */ result = cm_connect_sam(contact_domain, state->mem_ctx, true, &cli, &dom_pol); if (!NT_STATUS_IS_OK(result)) { DEBUG(1, ("could not get SAM handle on DC for %s\n", domain)); goto done; } b = cli->binding_handle; result = rpccli_samr_chng_pswd_auth_crap( cli, state->mem_ctx, user, new_nt_password, old_nt_hash_enc, new_lm_password, old_lm_hash_enc); done: if (strequal(contact_domain->name, get_global_sam_name())) { /* FIXME: internal rpc pipe does not cache handles yet */ if (b) { if (is_valid_policy_hnd(&dom_pol)) { NTSTATUS _result; dcerpc_samr_Close(b, state->mem_ctx, &dom_pol, &_result); } TALLOC_FREE(cli); } } set_auth_errors(state->response, result); DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n", domain, user, state->response->data.auth.nt_status_string, state->response->data.auth.pam_error)); return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR; } #ifdef HAVE_KRB5 static NTSTATUS extract_pac_vrfy_sigs(TALLOC_CTX *mem_ctx, DATA_BLOB pac_blob, struct PAC_DATA **p_pac_data) { krb5_context krbctx = NULL; krb5_error_code k5ret; krb5_keytab keytab; krb5_kt_cursor cursor; krb5_keytab_entry entry; NTSTATUS status = NT_STATUS_UNSUCCESSFUL; ZERO_STRUCT(entry); ZERO_STRUCT(cursor); k5ret = krb5_init_context(&krbctx); if (k5ret) { DEBUG(1, ("Failed to initialize kerberos context: %s\n", error_message(k5ret))); status = krb5_to_nt_status(k5ret); goto out; } k5ret = gse_krb5_get_server_keytab(krbctx, &keytab); if (k5ret) { DEBUG(1, ("Failed to get keytab: %s\n", error_message(k5ret))); status = krb5_to_nt_status(k5ret); goto out_free; } k5ret = krb5_kt_start_seq_get(krbctx, keytab, &cursor); if (k5ret) { DEBUG(1, ("Failed to start seq: %s\n", error_message(k5ret))); status = krb5_to_nt_status(k5ret); goto out_keytab; } k5ret = krb5_kt_next_entry(krbctx, keytab, &entry, &cursor); while (k5ret == 0) { status = kerberos_decode_pac(mem_ctx, pac_blob, krbctx, NULL, /* krbtgt_keyblock */ KRB5_KT_KEY(&entry), /* service_keyblock */ NULL, /* client_principal */ 0, /* tgs_authtime */ p_pac_data); if (NT_STATUS_IS_OK(status)) { break; } k5ret = smb_krb5_kt_free_entry(krbctx, &entry); k5ret = krb5_kt_next_entry(krbctx, keytab, &entry, &cursor); } k5ret = krb5_kt_end_seq_get(krbctx, keytab, &cursor); if (k5ret) { DEBUG(1, ("Failed to end seq: %s\n", error_message(k5ret))); } out_keytab: k5ret = krb5_kt_close(krbctx, keytab); if (k5ret) { DEBUG(1, ("Failed to close keytab: %s\n", error_message(k5ret))); } out_free: krb5_free_context(krbctx); out: return status; } NTSTATUS winbindd_pam_auth_pac_verify(struct winbindd_cli_state *state, bool *p_is_trusted, uint16_t *p_validation_level, union netr_Validation **p_validation) { struct winbindd_request *req = state->request; DATA_BLOB pac_blob; struct PAC_DATA *pac_data = NULL; struct PAC_LOGON_INFO *logon_info = NULL; struct PAC_UPN_DNS_INFO *upn_dns_info = NULL; struct netr_SamInfo6 *info6 = NULL; uint16_t validation_level = 0; union netr_Validation *validation = NULL; struct netr_SamInfo3 *info3_copy = NULL; NTSTATUS result; bool is_trusted = false; uint32_t i; *p_is_trusted = false; *p_validation_level = 0; *p_validation = NULL; pac_blob = data_blob_const(req->extra_data.data, req->extra_len); result = extract_pac_vrfy_sigs(state->mem_ctx, pac_blob, &pac_data); if (NT_STATUS_IS_OK(result)) { is_trusted = true; } if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)) { /* Try without signature verification */ result = kerberos_decode_pac(state->mem_ctx, pac_blob, NULL, /* krb5_context */ NULL, /* krbtgt_keyblock */ NULL, /* service_keyblock */ NULL, /* client_principal */ 0, /* tgs_authtime */ &pac_data); } if (!NT_STATUS_IS_OK(result)) { DEBUG(1, ("Error during PAC signature verification: %s\n", nt_errstr(result))); return result; } for (i=0; i < pac_data->num_buffers; i++) { if (pac_data->buffers[i].type == PAC_TYPE_LOGON_INFO) { logon_info = pac_data->buffers[i].info->logon_info.info; continue; } if (pac_data->buffers[i].type == PAC_TYPE_UPN_DNS_INFO) { upn_dns_info = &pac_data->buffers[i].info->upn_dns_info; continue; } } result = create_info6_from_pac(state->mem_ctx, logon_info, upn_dns_info, &info6); if (!NT_STATUS_IS_OK(result)) { return result; } result = map_info6_to_validation(state->mem_ctx, info6, &validation_level, &validation); if (!NT_STATUS_IS_OK(result)) { return result; } result = map_validation_to_info3(state->mem_ctx, validation_level, validation, &info3_copy); if (!NT_STATUS_IS_OK(result)) { return result; } if (is_trusted) { /* * Signature verification succeeded, we can * trust the PAC and prime the netsamlogon * and name2sid caches. DO NOT DO THIS * in the signature verification failed * code path. */ struct winbindd_domain *domain = NULL; netsamlogon_cache_store(NULL, info3_copy); /* * We're in the parent here, so find the child * pointer from the PAC domain name. */ domain = find_lookup_domain_from_name( info3_copy->base.logon_domain.string); if (domain && domain->primary ) { struct dom_sid user_sid; sid_compose(&user_sid, info3_copy->base.domain_sid, info3_copy->base.rid); cache_name2sid_trusted(domain, info3_copy->base.logon_domain.string, info3_copy->base.account_name.string, SID_NAME_USER, &user_sid); DBG_INFO("PAC for user %s\\%s SID %s primed cache\n", info3_copy->base.logon_domain.string, info3_copy->base.account_name.string, sid_string_dbg(&user_sid)); } } *p_is_trusted = is_trusted; *p_validation_level = validation_level; *p_validation = validation; return NT_STATUS_OK; } #else /* HAVE_KRB5 */ NTSTATUS winbindd_pam_auth_pac_verify(struct winbindd_cli_state *state, bool *p_is_trusted, uint16_t *p_validation_level, union netr_Validation **p_validation); { *p_is_trusted = false; *p_validation_level = 0; *p_validation = NULL; return NT_STATUS_NO_SUCH_USER; } #endif /* HAVE_KRB5 */