/* 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" #undef DBGC_CLASS #define DBGC_CLASS DBGC_WINBIND static NTSTATUS append_info3_as_txt(TALLOC_CTX *mem_ctx, struct winbindd_cli_state *state, struct netr_SamInfo3 *info3) { char *ex; size_t size; uint32_t i; state->response.data.auth.info3.logon_time = nt_time_to_unix(info3->base.last_logon); state->response.data.auth.info3.logoff_time = nt_time_to_unix(info3->base.last_logoff); state->response.data.auth.info3.kickoff_time = nt_time_to_unix(info3->base.acct_expiry); state->response.data.auth.info3.pass_last_set_time = nt_time_to_unix(info3->base.last_password_change); state->response.data.auth.info3.pass_can_change_time = nt_time_to_unix(info3->base.allow_password_change); state->response.data.auth.info3.pass_must_change_time = nt_time_to_unix(info3->base.force_password_change); state->response.data.auth.info3.logon_count = info3->base.logon_count; state->response.data.auth.info3.bad_pw_count = info3->base.bad_password_count; state->response.data.auth.info3.user_rid = info3->base.rid; state->response.data.auth.info3.group_rid = info3->base.primary_gid; sid_to_fstring(state->response.data.auth.info3.dom_sid, info3->base.domain_sid); state->response.data.auth.info3.num_groups = info3->base.groups.count; state->response.data.auth.info3.user_flgs = info3->base.user_flags; state->response.data.auth.info3.acct_flags = info3->base.acct_flags; state->response.data.auth.info3.num_other_sids = info3->sidcount; fstrcpy(state->response.data.auth.info3.user_name, info3->base.account_name.string); fstrcpy(state->response.data.auth.info3.full_name, info3->base.full_name.string); fstrcpy(state->response.data.auth.info3.logon_script, info3->base.logon_script.string); fstrcpy(state->response.data.auth.info3.profile_path, info3->base.profile_path.string); fstrcpy(state->response.data.auth.info3.home_dir, info3->base.home_directory.string); fstrcpy(state->response.data.auth.info3.dir_drive, info3->base.home_drive.string); fstrcpy(state->response.data.auth.info3.logon_srv, info3->base.logon_server.string); fstrcpy(state->response.data.auth.info3.logon_dom, info3->base.domain.string); ex = talloc_strdup(mem_ctx, ""); NT_STATUS_HAVE_NO_MEMORY(ex); 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); NT_STATUS_HAVE_NO_MEMORY(ex); } for (i=0; i < info3->sidcount; i++) { char *sid; sid = dom_sid_string(mem_ctx, info3->sids[i].sid); NT_STATUS_HAVE_NO_MEMORY(sid); ex = talloc_asprintf_append_buffer(ex, "%s:0x%08X\n", sid, info3->sids[i].attributes); NT_STATUS_HAVE_NO_MEMORY(ex); talloc_free(sid); } size = talloc_get_size(ex); SAFE_FREE(state->response.extra_data.data); state->response.extra_data.data = SMB_MALLOC(size); if (!state->response.extra_data.data) { return NT_STATUS_NO_MEMORY; } memcpy(state->response.extra_data.data, ex, size); talloc_free(ex); state->response.length += size; return NT_STATUS_OK; } static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx, struct winbindd_cli_state *state, 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); } SAFE_FREE(state->response.extra_data.data); state->response.extra_data.data = SMB_MALLOC(blob.length); if (!state->response.extra_data.data) { data_blob_free(&blob); return NT_STATUS_NO_MEMORY; } memset(state->response.extra_data.data, '\0', blob.length); memcpy(state->response.extra_data.data, blob.data, blob.length); state->response.length += blob.length; data_blob_free(&blob); return NT_STATUS_OK; } static NTSTATUS append_unix_username(TALLOC_CTX *mem_ctx, struct winbindd_cli_state *state, 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.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(state->response.data.auth.unix_username, nt_domain, nt_username, True); DEBUG(5,("Setting unix username to [%s]\n", state->response.data.auth.unix_username)); return NT_STATUS_OK; } static NTSTATUS append_afs_token(TALLOC_CTX *mem_ctx, struct winbindd_cli_state *state, const struct netr_SamInfo3 *info3, const char *name_domain, const char *name_user) { char *afsname = NULL; char *cell; 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); { DOM_SID user_sid; fstring sidstr; sid_copy(&user_sid, info3->base.domain_sid); sid_append_rid(&user_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; } strlower_m(afsname); DEBUG(10, ("Generating token for user %s\n", afsname)); cell = strchr(afsname, '@'); if (cell == NULL) { return NT_STATUS_NO_MEMORY; } *cell = '\0'; cell += 1; /* Append an AFS token string */ SAFE_FREE(state->response.extra_data.data); state->response.extra_data.data = afs_createtoken_str(afsname, cell); if (state->response.extra_data.data != NULL) { state->response.length += strlen((const char *)state->response.extra_data.data)+1; } return NT_STATUS_OK; } static NTSTATUS check_info3_in_group(TALLOC_CTX *mem_ctx, 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. */ { DOM_SID *require_membership_of_sid; size_t num_require_membership_of_sid; char *req_sid; const char *p; DOM_SID sid; size_t i; struct nt_user_token *token; TALLOC_CTX *frame = NULL; NTSTATUS status; /* Parse the 'required group' SID */ if (!group_sid || !group_sid[0]) { /* NO sid supplied, all users may access */ return NT_STATUS_OK; } if (!(token = TALLOC_ZERO_P(mem_ctx, struct nt_user_token))) { DEBUG(0, ("talloc failed\n")); return NT_STATUS_NO_MEMORY; } num_require_membership_of_sid = 0; require_membership_of_sid = NULL; p = group_sid; frame = talloc_stackframe(); while (next_token_talloc(frame, &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(mem_ctx, &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; } } TALLOC_FREE(frame); status = sid_array_from_info3(mem_ctx, info3, &token->user_sids, &token->num_sids, True); if (!NT_STATUS_IS_OK(status)) { 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))); return status; } debug_nt_user_token(DBGC_CLASS, 10, token); for (i=0; irequest.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 set_auth_errors(struct winbindd_response *resp, NTSTATUS result) { resp->data.auth.nt_status = NT_STATUS_V(result); fstrcpy(resp->data.auth.nt_status_string, nt_errstr(result)); /* we might have given a more useful error above */ if (*resp->data.auth.error_string == '\0') fstrcpy(resp->data.auth.error_string, get_friendly_nt_error_msg(result)); resp->data.auth.pam_error = nt_status_to_pam(result); } static NTSTATUS fillup_password_policy(struct winbindd_domain *domain, struct winbindd_cli_state *state) { struct winbindd_methods *methods; NTSTATUS status = NT_STATUS_UNSUCCESSFUL; 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)); return NT_STATUS_NOT_SUPPORTED; } methods = domain->methods; status = methods->password_policy(domain, state->mem_ctx, &password_policy); if (NT_STATUS_IS_ERR(status)) { return status; } state->response.data.auth.policy.min_length_password = password_policy.min_password_length; state->response.data.auth.policy.password_history = password_policy.password_history_length; state->response.data.auth.policy.password_properties = password_policy.password_properties; state->response.data.auth.policy.expire = nt_time_to_unix_abs((NTTIME *)&(password_policy.max_password_age)); state->response.data.auth.policy.min_passwordage = nt_time_to_unix_abs((NTTIME *)&(password_policy.min_password_age)); return NT_STATUS_OK; } static NTSTATUS get_max_bad_attempts_from_lockout_policy(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx, uint16 *lockout_threshold) { struct winbindd_methods *methods; NTSTATUS status = NT_STATUS_UNSUCCESSFUL; struct samr_DomInfo12 lockout_policy; *lockout_threshold = 0; methods = domain->methods; status = methods->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 *password_properties) { struct winbindd_methods *methods; NTSTATUS status = NT_STATUS_UNSUCCESSFUL; struct samr_DomInfo1 password_policy; *password_properties = 0; methods = domain->methods; status = methods->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, bool *internal_ccache) { /* 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; *internal_ccache = True; if (uid == -1) { goto memory_ccache; } if (!type || type[0] == '\0') { goto memory_ccache; } if (strequal(type, "FILE")) { gen_cc = talloc_asprintf(mem_ctx, "FILE:/tmp/krb5cc_%d", uid); } else if (strequal(type, "WRFILE")) { gen_cc = talloc_asprintf(mem_ctx, "WRFILE:/tmp/krb5cc_%d", uid); } else { DEBUG(10,("we don't allow to set a %s type ccache\n", type)); goto memory_ccache; } *internal_ccache = False; goto done; memory_ccache: gen_cc = talloc_strdup(mem_ctx, "MEMORY:winbindd_pam_ccache"); done: if (gen_cc == NULL) { DEBUG(0,("out of memory\n")); return NULL; } DEBUG(10,("using ccache: %s %s\n", gen_cc, *internal_ccache ? "(internal)":"")); return gen_cc; } static void setup_return_cc_name(struct winbindd_cli_state *state, const char *cc) { const char *type = state->request.data.auth.krb5_cc_type; state->response.data.auth.krb5ccname[0] = '\0'; if (type[0] == '\0') { return; } if (!strequal(type, "FILE") && !strequal(type, "WRFILE")) { DEBUG(10,("won't return krbccname for a %s type ccache\n", type)); return; } fstrcpy(state->response.data.auth.krb5ccname, cc); } #endif static uid_t get_uid_from_state(struct winbindd_cli_state *state) { uid_t uid = -1; uid = state->request.data.auth.uid; if (uid < 0) { DEBUG(1,("invalid uid: '%d'\n", 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(struct winbindd_domain *domain, struct winbindd_cli_state *state, struct netr_SamInfo3 **info3) { #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_domain, name_user; time_t ticket_lifetime = 0; time_t renewal_until = 0; uid_t uid = -1; ADS_STRUCT *ads; time_t time_offset = 0; bool internal_ccache = True; ZERO_STRUCTP(info3); *info3 = NULL; /* 1st step: * prepare a krb5_cc_cache string for the user */ uid = get_uid_from_state(state); if (uid == -1) { DEBUG(0,("no valid uid\n")); } cc = generate_krb5_ccache(state->mem_ctx, state->request.data.auth.krb5_cc_type, state->request.data.auth.uid, &internal_ccache); 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 */ parse_domain_user(state->request.data.auth.user, name_domain, name_user); realm = domain->alt_name; strupper_m(realm); 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 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 (!internal_ccache) { set_effective_uid(uid); DEBUG(10,("winbindd_raw_kerberos_login: uid is %d\n", uid)); } result = kerberos_return_info3_from_pac(state->mem_ctx, principal_s, state->request.data.auth.pass, time_offset, &ticket_lifetime, &renewal_until, cc, True, True, WINBINDD_PAM_AUTH_KRB5_RENEW_TIME, info3); if (!internal_ccache) { gain_root_privilege(); } /************************ RETURNED TO ROOT **********************/ if (!NT_STATUS_IS_OK(result)) { goto failed; } DEBUG(10,("winbindd_raw_kerberos_login: winbindd validated ticket of %s\n", principal_s)); /* if we had a user's ccache then return that string for the pam * environment */ if (!internal_ccache) { setup_return_cc_name(state, cc); result = add_ccache_to_list(principal_s, cc, service, state->request.data.auth.user, 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))); } } return NT_STATUS_OK; failed: /* 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(state->request.data.auth.user))) { DEBUG(3,("winbindd_raw_kerberos_login: " "could not remove ccache for user %s\n", state->request.data.auth.user)); } return result; #else return NT_STATUS_NOT_SUPPORTED; #endif /* HAVE_KRB5 */ } /**************************************************************** ****************************************************************/ static 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; } /**************************************************************** ****************************************************************/ static NTSTATUS append_data(struct winbindd_cli_state *state, struct netr_SamInfo3 *info3, const char *name_domain, const char *name_user) { NTSTATUS result; uint32_t flags = state->request.flags; if (flags & WBFLAG_PAM_USER_SESSION_KEY) { memcpy(state->response.data.auth.user_session_key, info3->base.key.key, sizeof(state->response.data.auth.user_session_key) /* 16 */); } if (flags & WBFLAG_PAM_LMKEY) { memcpy(state->response.data.auth.first_8_lm_hash, info3->base.LMSessKey.key, sizeof(state->response.data.auth.first_8_lm_hash) /* 8 */); } if (flags & WBFLAG_PAM_INFO3_TEXT) { result = append_info3_as_txt(state->mem_ctx, state, info3); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to append INFO3 (TXT): %s\n", nt_errstr(result))); return result; } } /* currently, anything from here on potentially overwrites extra_data. */ if (flags & WBFLAG_PAM_INFO3_NDR) { result = append_info3_as_ndr(state->mem_ctx, state, info3); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to append INFO3 (NDR): %s\n", nt_errstr(result))); return result; } } if (flags & WBFLAG_PAM_UNIX_NAME) { result = append_unix_username(state->mem_ctx, state, info3, name_domain, name_user); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to append Unix Username: %s\n", nt_errstr(result))); return result; } } if (flags & WBFLAG_PAM_AFS_TOKEN) { result = append_afs_token(state->mem_ctx, state, info3, name_domain, name_user); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to append AFS token: %s\n", nt_errstr(result))); return result; } } return NT_STATUS_OK; } void winbindd_pam_auth(struct winbindd_cli_state *state) { struct winbindd_domain *domain; fstring name_domain, name_user; NTSTATUS result; /* 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]: pam auth %s\n", (unsigned long)state->pid, state->request.data.auth.user)); if (!check_request_flags(state->request.flags)) { result = NT_STATUS_INVALID_PARAMETER_MIX; goto done; } /* Parse domain and username */ ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR ); if (!canonicalize_username(state->request.data.auth.user, name_domain, name_user)) { result = NT_STATUS_NO_SUCH_USER; goto done; } domain = find_auth_domain(state, name_domain); if (domain == NULL) { result = NT_STATUS_NO_SUCH_USER; goto done; } sendto_domain(state, domain); return; done: set_auth_errors(&state->response, result); DEBUG(5, ("Plain text authentication for %s returned %s " "(PAM: %d)\n", state->request.data.auth.user, state->response.data.auth.nt_status_string, state->response.data.auth.pam_error)); request_error(state); } 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 max_allowed_bad_attempts; fstring name_domain, name_user; DOM_SID sid; enum lsa_SidType type; uchar new_nt_pass[NT_HASH_LEN]; const uint8 *cached_nt_pass; const uint8 *cached_salt; struct netr_SamInfo3 *my_info3; time_t kickoff_time, must_change_time; bool password_good = False; #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 */ parse_domain_user(state->request.data.auth.user, name_domain, name_user); if (!lookup_cached_name(state->mem_ctx, 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) ? True : False; } 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) ? True : False; } 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.acct_expiry); 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 & NETR_TRUST_TYPE_UPLEVEL)) { uid_t uid = -1; const char *cc = NULL; char *realm = NULL; const char *principal_s = NULL; const char *service = NULL; bool internal_ccache = False; uid = get_uid_from_state(state); 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, &internal_ccache); if (cc == NULL) { return NT_STATUS_NO_MEMORY; } realm = domain->alt_name; strupper_m(realm); 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 (!internal_ccache) { setup_return_cc_name(state, cc); result = add_ccache_to_list(principal_s, cc, service, state->request.data.auth.user, domain->alt_name, 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.last_logon, time(NULL)); my_info3->base.bad_password_count = 0; result = winbindd_update_creds_by_info3(domain, state->mem_ctx, 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 */ /* 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 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_USER_RID_ADMIN) || (password_properties & DOMAIN_PASSWORD_LOCKOUT_ADMINS)) { my_info3->base.acct_flags |= ACB_AUTOLOCK; } } failed: result = winbindd_update_creds_by_info3(domain, state->mem_ctx, 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; } NTSTATUS winbindd_dual_pam_auth_kerberos(struct winbindd_domain *domain, struct winbindd_cli_state *state, struct netr_SamInfo3 **info3) { struct winbindd_domain *contact_domain; fstring name_domain, name_user; NTSTATUS result; DEBUG(10,("winbindd_dual_pam_auth_kerberos\n")); /* Parse domain and username */ parse_domain_user(state->request.data.auth.user, name_domain, name_user); /* what domain should we contact? */ if ( IS_DC ) { if (!(contact_domain = find_domain_from_name(name_domain))) { 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_domain); 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)); contact_domain = find_our_domain(); } } if (contact_domain->initialized && contact_domain->active_directory) { goto try_login; } if (!contact_domain->initialized) { init_dc_connection(contact_domain); } 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(contact_domain, state, info3); done: return result; } NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain, struct winbindd_cli_state *state, struct netr_SamInfo3 **info3) { struct rpc_pipe_client *netlogon_pipe; uchar chal[8]; DATA_BLOB lm_resp; DATA_BLOB nt_resp; int attempts = 0; unsigned char local_lm_response[24]; unsigned char local_nt_response[24]; struct winbindd_domain *contact_domain; fstring name_domain, name_user; bool retry; NTSTATUS result; struct netr_SamInfo3 *my_info3 = NULL; *info3 = NULL; DEBUG(10,("winbindd_dual_pam_auth_samlogon\n")); /* Parse domain and username */ parse_domain_user(state->request.data.auth.user, name_domain, name_user); /* do password magic */ generate_random_buffer(chal, 8); if (lp_client_ntlmv2_auth()) { DATA_BLOB server_chal; DATA_BLOB names_blob; DATA_BLOB nt_response; DATA_BLOB lm_response; server_chal = data_blob_talloc(state->mem_ctx, chal, 8); /* note that the 'workgroup' here is a best guess - we don't know the server's domain at this point. The 'server name' is also dodgy... */ names_blob = NTLMv2_generate_names_blob(global_myname(), lp_workgroup()); if (!SMBNTLMv2encrypt(name_user, name_domain, state->request.data.auth.pass, &server_chal, &names_blob, &lm_response, &nt_response, NULL)) { data_blob_free(&names_blob); data_blob_free(&server_chal); DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n")); result = NT_STATUS_NO_MEMORY; goto done; } data_blob_free(&names_blob); data_blob_free(&server_chal); lm_resp = data_blob_talloc(state->mem_ctx, lm_response.data, lm_response.length); nt_resp = data_blob_talloc(state->mem_ctx, nt_response.data, nt_response.length); data_blob_free(&lm_response); data_blob_free(&nt_response); } else { if (lp_client_lanman_auth() && SMBencrypt(state->request.data.auth.pass, chal, local_lm_response)) { lm_resp = data_blob_talloc(state->mem_ctx, local_lm_response, sizeof(local_lm_response)); } else { lm_resp = data_blob_null; } SMBNTencrypt(state->request.data.auth.pass, chal, local_nt_response); nt_resp = data_blob_talloc(state->mem_ctx, local_nt_response, sizeof(local_nt_response)); } /* what domain should we contact? */ if ( IS_DC ) { if (!(contact_domain = find_domain_from_name(name_domain))) { 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_our_domain(); } /* check authentication loop */ do { NTSTATUS (*logon_fn)(struct rpc_pipe_client *cli, TALLOC_CTX *mem_ctx, uint32 logon_parameters, const char *server, const char *username, const char *domain, const char *workstation, const uint8 chal[8], DATA_BLOB lm_response, DATA_BLOB nt_response, struct netr_SamInfo3 **info3); ZERO_STRUCTP(my_info3); retry = False; result = cm_connect_netlogon(contact_domain, &netlogon_pipe); if (!NT_STATUS_IS_OK(result)) { DEBUG(3, ("could not open handle to NETLOGON pipe\n")); goto done; } logon_fn = contact_domain->can_do_samlogon_ex ? rpccli_netlogon_sam_network_logon_ex : rpccli_netlogon_sam_network_logon; result = logon_fn(netlogon_pipe, state->mem_ctx, 0, contact_domain->dcname, /* server name */ name_user, /* user name */ name_domain, /* target domain */ global_myname(), /* workstation */ chal, lm_resp, nt_resp, &my_info3); attempts += 1; if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR) && contact_domain->can_do_samlogon_ex) { DEBUG(3, ("Got a DC that can not do NetSamLogonEx, " "retrying with NetSamLogon\n")); contact_domain->can_do_samlogon_ex = False; retry = True; continue; } /* We have to try a second time as cm_connect_netlogon might not yet have noticed that the DC has killed our connection. */ if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) { 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(3,("winbindd_pam_auth: sam_logon returned " "ACCESS_DENIED. Maybe the trust account " "password was changed and we didn't know it. " "Killing connections to domain %s\n", name_domain)); invalidate_cm_connection(&contact_domain->conn); retry = True; } } while ( (attempts < 2) && retry ); /* 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 ourselve - gd */ if ((state->request.flags & WBFLAG_PAM_INFO3_TEXT) && NT_STATUS_IS_OK(result) && (my_info3->base.acct_flags == 0)) { struct rpc_pipe_client *samr_pipe; POLICY_HND samr_domain_handle, user_pol; union samr_UserInfo *info = NULL; NTSTATUS status_tmp; uint32 acct_flags; status_tmp = cm_connect_sam(contact_domain, state->mem_ctx, &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; } status_tmp = rpccli_samr_OpenUser(samr_pipe, state->mem_ctx, &samr_domain_handle, MAXIMUM_ALLOWED_ACCESS, my_info3->base.rid, &user_pol); 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; } status_tmp = rpccli_samr_QueryUserInfo(samr_pipe, state->mem_ctx, &user_pol, 16, &info); if (!NT_STATUS_IS_OK(status_tmp)) { DEBUG(3, ("could not query user info on SAMR pipe: %s\n", nt_errstr(status_tmp))); rpccli_samr_Close(samr_pipe, state->mem_ctx, &user_pol); goto done; } acct_flags = info->info16.acct_flags; if (acct_flags == 0) { rpccli_samr_Close(samr_pipe, state->mem_ctx, &user_pol); goto done; } my_info3->base.acct_flags = acct_flags; DEBUG(10,("successfully retrieved acct_flags 0x%x\n", acct_flags)); rpccli_samr_Close(samr_pipe, state->mem_ctx, &user_pol); } *info3 = my_info3; done: 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_domain, name_user; struct netr_SamInfo3 *info3 = NULL; /* 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)); if (!check_request_flags(state->request.flags)) { result = NT_STATUS_INVALID_PARAMETER_MIX; goto done; } /* Parse domain and username */ ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR ); parse_domain_user(state->request.data.auth.user, name_domain, name_user); if (domain->online == False) { 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); } } 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)) { result = winbindd_dual_pam_auth_kerberos(domain, state, &info3); /* save for later */ krb5_result = result; if (NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_kerberos succeeded\n")); goto process_result; } else { DEBUG(10,("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 process_result; } 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) { result = winbindd_dual_pam_auth_samlogon(domain, state, &info3); if (NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_samlogon succeeded\n")); /* add the Krb5 err if we have one */ if ( NT_STATUS_EQUAL(krb5_result, NT_STATUS_TIME_DIFFERENCE_AT_DC ) ) { info3->base.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()) { result = winbindd_dual_pam_auth_cached(domain, state, &info3); if (NT_STATUS_IS_OK(result)) { DEBUG(10,("winbindd_dual_pam_auth_cached succeeded\n")); goto process_result; } else { DEBUG(10,("winbindd_dual_pam_auth_cached failed: %s\n", nt_errstr(result))); goto done; } } process_result: if (NT_STATUS_IS_OK(result)) { DOM_SID user_sid; /* In all codepaths where result == NT_STATUS_OK info3 must have been initialized. */ if (!info3) { result = NT_STATUS_INTERNAL_ERROR; goto done; } netsamlogon_cache_store(name_user, info3); wcache_invalidate_samlogon(find_domain_from_name(name_domain), 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 ) { sid_compose(&user_sid, info3->base.domain_sid, info3->base.rid); cache_name2sid(domain, name_domain, name_user, SID_NAME_USER, &user_sid); } /* Check if the user is in the right group */ if (!NT_STATUS_IS_OK(result = check_info3_in_group(state->mem_ctx, info3, state->request.data.auth.require_membership_of_sid))) { 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_data(state, info3, name_domain, name_user); if (!NT_STATUS_IS_OK(result)) { goto done; } if ((state->request.flags & WBFLAG_PAM_CACHED_LOGIN)) { /* Store in-memory creds for single-signon using ntlm_auth. */ result = winbindd_add_memory_creds(state->request.data.auth.user, get_uid_from_state(state), state->request.data.auth.pass); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to store memory creds: %s\n", nt_errstr(result))); goto done; } if (lp_winbind_offline_logon()) { result = winbindd_store_creds(domain, state->mem_ctx, state->request.data.auth.user, state->request.data.auth.pass, info3, NULL); if (!NT_STATUS_IS_OK(result)) { /* Release refcount. */ winbindd_delete_memory_creds(state->request.data.auth.user); DEBUG(10,("Failed to store creds: %s\n", nt_errstr(result))); goto done; } } } if (state->request.flags & WBFLAG_PAM_GET_PWD_POLICY) { result = fillup_password_policy(domain, state); if (!NT_STATUS_IS_OK(result) && !NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED) ) { DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(result))); goto done; } } 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; } state->response.data.auth.nt_status = NT_STATUS_V(result); fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result)); /* we might have given a more useful error above */ if (!*state->response.data.auth.error_string) fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result)); state->response.data.auth.pam_error = nt_status_to_pam(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; } /********************************************************************** Challenge Response Authentication Protocol **********************************************************************/ void winbindd_pam_auth_crap(struct winbindd_cli_state *state) { struct winbindd_domain *domain = NULL; const char *domain_name = NULL; NTSTATUS result; if (!check_request_flags(state->request.flags)) { result = NT_STATUS_INVALID_PARAMETER_MIX; goto done; } if (!state->privileged) { char *error_string = NULL; DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access " "denied. !\n")); DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions " "on %s are set correctly.\n", get_winbind_priv_pipe_dir())); /* send a better message than ACCESS_DENIED */ error_string = talloc_asprintf(state->mem_ctx, "winbind client not authorized " "to use winbindd_pam_auth_crap." " Ensure permissions on %s " "are set correctly.", get_winbind_priv_pipe_dir()); fstrcpy(state->response.data.auth.error_string, error_string); result = NT_STATUS_ACCESS_DENIED; goto done; } /* 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; DEBUG(3, ("[%5lu]: pam auth crap domain: [%s] user: %s\n", (unsigned long)state->pid, state->request.data.auth_crap.domain, state->request.data.auth_crap.user)); if (*state->request.data.auth_crap.domain != '\0') { domain_name = state->request.data.auth_crap.domain; } else if (lp_winbind_use_default_domain()) { domain_name = lp_workgroup(); } if (domain_name != NULL) domain = find_auth_domain(state, domain_name); if (domain != NULL) { sendto_domain(state, domain); return; } result = NT_STATUS_NO_SUCH_USER; done: set_auth_errors(&state->response, result); DEBUG(5, ("CRAP authentication for %s\\%s returned %s (PAM: %d)\n", state->request.data.auth_crap.domain, state->request.data.auth_crap.user, state->response.data.auth.nt_status_string, state->response.data.auth.pam_error)); request_error(state); return; } enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain, struct winbindd_cli_state *state) { NTSTATUS result; struct netr_SamInfo3 *info3 = NULL; struct rpc_pipe_client *netlogon_pipe; const char *name_user = NULL; const char *name_domain = NULL; const char *workstation; struct winbindd_domain *contact_domain; int attempts = 0; bool retry; 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; if (!check_request_flags(state->request.flags)) { result = NT_STATUS_INVALID_PARAMETER_MIX; goto done; } name_user = state->request.data.auth_crap.user; if (*state->request.data.auth_crap.domain) { name_domain = state->request.data.auth_crap.domain; } else if (lp_winbind_use_default_domain()) { name_domain = lp_workgroup(); } else { DEBUG(5,("no domain specified with username (%s) - failing auth\n", name_user)); result = NT_STATUS_NO_SUCH_USER; goto done; } 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.workstation) { workstation = state->request.data.auth_crap.workstation; } else { workstation = global_myname(); } 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)) { 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); nt_resp = data_blob_talloc(state->mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len); /* what domain should we contact? */ if ( IS_DC ) { if (!(contact_domain = find_domain_from_name(name_domain))) { DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n", state->request.data.auth_crap.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_our_domain(); } do { NTSTATUS (*logon_fn)(struct rpc_pipe_client *cli, TALLOC_CTX *mem_ctx, uint32 logon_parameters, const char *server, const char *username, const char *domain, const char *workstation, const uint8 chal[8], DATA_BLOB lm_response, DATA_BLOB nt_response, struct netr_SamInfo3 **info3); retry = False; netlogon_pipe = NULL; result = cm_connect_netlogon(contact_domain, &netlogon_pipe); if (!NT_STATUS_IS_OK(result)) { DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n", nt_errstr(result))); goto done; } logon_fn = contact_domain->can_do_samlogon_ex ? rpccli_netlogon_sam_network_logon_ex : rpccli_netlogon_sam_network_logon; result = logon_fn(netlogon_pipe, state->mem_ctx, state->request.data.auth_crap.logon_parameters, contact_domain->dcname, 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, &info3); if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR) && contact_domain->can_do_samlogon_ex) { DEBUG(3, ("Got a DC that can not do NetSamLogonEx, " "retrying with NetSamLogon\n")); contact_domain->can_do_samlogon_ex = False; retry = True; continue; } 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 (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) { 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(3,("winbindd_pam_auth: sam_logon returned " "ACCESS_DENIED. Maybe the trust account " "password was changed and we didn't know it. " "Killing connections to domain %s\n", name_domain)); invalidate_cm_connection(&contact_domain->conn); retry = True; } } while ( (attempts < 2) && retry ); if (NT_STATUS_IS_OK(result)) { netsamlogon_cache_store(name_user, info3); wcache_invalidate_samlogon(find_domain_from_name(name_domain), info3); /* Check if the user is in the right group */ if (!NT_STATUS_IS_OK(result = check_info3_in_group(state->mem_ctx, info3, state->request.data.auth_crap.require_membership_of_sid))) { 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_data(state, info3, name_domain, name_user); if (!NT_STATUS_IS_OK(result)) { goto done; } } 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; } if (state->request.flags & WBFLAG_PAM_NT_STATUS_SQUASH) { result = nt_status_squash(result); } state->response.data.auth.nt_status = NT_STATUS_V(result); fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result)); /* we might have given a more useful error above */ if (!*state->response.data.auth.error_string) { fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result)); } state->response.data.auth.pam_error = nt_status_to_pam(result); DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n", name_domain, name_user, state->response.data.auth.nt_status_string, state->response.data.auth.pam_error)); return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR; } /* Change a user password */ void winbindd_pam_chauthtok(struct winbindd_cli_state *state) { fstring domain, user; struct winbindd_domain *contact_domain; DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid, state->request.data.chauthtok.user)); /* Setup crap */ ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR ); if (!canonicalize_username(state->request.data.chauthtok.user, domain, user)) { set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER); DEBUG(5, ("winbindd_pam_chauthtok: canonicalize_username %s failed with %s" "(PAM: %d)\n", state->request.data.auth.user, state->response.data.auth.nt_status_string, state->response.data.auth.pam_error)); request_error(state); return; } contact_domain = find_domain_from_name(domain); if (!contact_domain) { set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER); DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n", state->request.data.chauthtok.user, domain, user, domain)); request_error(state); return; } sendto_domain(state, contact_domain); } enum winbindd_result winbindd_dual_pam_chauthtok(struct winbindd_domain *contact_domain, struct winbindd_cli_state *state) { char *oldpass; char *newpass = NULL; POLICY_HND dom_pol; struct rpc_pipe_client *cli; bool got_info = False; struct samr_DomInfo1 *info = NULL; struct samr_ChangeReject *reject = NULL; NTSTATUS result = NT_STATUS_UNSUCCESSFUL; fstring domain, user; DEBUG(3, ("[%5lu]: dual pam chauthtok %s\n", (unsigned long)state->pid, state->request.data.auth.user)); if (!parse_domain_user(state->request.data.chauthtok.user, domain, user)) { 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, &cli, &dom_pol); if (!NT_STATUS_IS_OK(result)) { DEBUG(1, ("could not get SAM handle on DC for %s\n", domain)); goto done; } result = rpccli_samr_chgpasswd3(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) ) { state->response.data.auth.policy.min_length_password = info->min_password_length; state->response.data.auth.policy.password_history = info->password_history_length; state->response.data.auth.policy.password_properties = info->password_properties; state->response.data.auth.policy.expire = nt_time_to_unix_abs((NTTIME *)&info->max_password_age); state->response.data.auth.policy.min_passwordage = nt_time_to_unix_abs((NTTIME *)&info->min_password_age); state->response.data.auth.reject_reason = reject->reason; got_info = True; } /* only fallback when the chgpasswd3 call is not supported */ if ((NT_STATUS_EQUAL(result, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR))) || (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) || (NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED))) { DEBUG(10,("Password change with chgpasswd3 failed with: %s, retrying chgpasswd_user\n", nt_errstr(result))); result = rpccli_samr_chgpasswd_user(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)) { /* Update the single sign-on memory creds. */ result = winbindd_replace_memory_creds(state->request.data.chauthtok.user, newpass); if (!NT_STATUS_IS_OK(result)) { DEBUG(10,("Failed to replace memory creds: %s\n", nt_errstr(result))); goto process_result; } if (lp_winbind_offline_logon()) { result = winbindd_update_creds_by_name(contact_domain, state->mem_ctx, user, newpass); 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); /* 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: state->response.data.auth.nt_status = NT_STATUS_V(result); fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result)); fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result)); state->response.data.auth.pam_error = nt_status_to_pam(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; } void winbindd_pam_logoff(struct winbindd_cli_state *state) { struct winbindd_domain *domain; fstring name_domain, user; uid_t caller_uid = (uid_t)-1; uid_t request_uid = state->request.data.logoff.uid; DEBUG(3, ("[%5lu]: pam logoff %s\n", (unsigned long)state->pid, state->request.data.logoff.user)); /* Ensure null termination */ state->request.data.logoff.user [sizeof(state->request.data.logoff.user)-1]='\0'; state->request.data.logoff.krb5ccname [sizeof(state->request.data.logoff.krb5ccname)-1]='\0'; if (request_uid == (gid_t)-1) { goto failed; } if (!canonicalize_username(state->request.data.logoff.user, name_domain, user)) { goto failed; } if ((domain = find_auth_domain(state, name_domain)) == NULL) { goto failed; } if ((sys_getpeereid(state->sock, &caller_uid)) != 0) { DEBUG(1,("winbindd_pam_logoff: failed to check peerid: %s\n", strerror(errno))); goto failed; } switch (caller_uid) { case -1: goto failed; case 0: /* root must be able to logoff any user - gd */ state->request.data.logoff.uid = request_uid; break; default: if (caller_uid != request_uid) { DEBUG(1,("winbindd_pam_logoff: caller requested invalid uid\n")); goto failed; } state->request.data.logoff.uid = caller_uid; break; } sendto_domain(state, domain); return; failed: set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER); DEBUG(5, ("Pam Logoff for %s returned %s " "(PAM: %d)\n", state->request.data.logoff.user, state->response.data.auth.nt_status_string, state->response.data.auth.pam_error)); request_error(state); return; } 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 < 0) { 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; } #else result = NT_STATUS_NOT_SUPPORTED; #endif process_result: winbindd_delete_memory_creds(state->request.data.logoff.user); state->response.data.auth.nt_status = NT_STATUS_V(result); fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result)); fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result)); state->response.data.auth.pam_error = nt_status_to_pam(result); return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR; } /* Change user password with auth crap*/ void winbindd_pam_chng_pswd_auth_crap(struct winbindd_cli_state *state) { struct winbindd_domain *domain = NULL; const char *domain_name = NULL; /* 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; 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 (*state->request.data.chng_pswd_auth_crap.domain != '\0') { domain_name = state->request.data.chng_pswd_auth_crap.domain; } else if (lp_winbind_use_default_domain()) { domain_name = lp_workgroup(); } if (domain_name != NULL) domain = find_domain_from_name(domain_name); if (domain != NULL) { DEBUG(7, ("[%5lu]: pam auth crap changing pswd in domain: " "%s\n", (unsigned long)state->pid,domain->name)); sendto_domain(state, domain); return; } set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER); DEBUG(5, ("CRAP change password for %s\\%s returned %s (PAM: %d)\n", state->request.data.chng_pswd_auth_crap.domain, state->request.data.chng_pswd_auth_crap.user, state->response.data.auth.nt_status_string, state->response.data.auth.pam_error)); request_error(state); return; } 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 domain,user; POLICY_HND dom_pol; struct winbindd_domain *contact_domain = domainSt; struct rpc_pipe_client *cli; /* 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; *user = 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 { parse_domain_user(state->request.data.chng_pswd_auth_crap.user, domain, user); 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,(char *)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_talloc( state->mem_ctx, 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_talloc( state->mem_ctx, 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_talloc( state->mem_ctx, 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_talloc( state->mem_ctx, 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.length = 0; old_lm_hash_enc.length = 0; } /* Get sam handle */ result = cm_connect_sam(contact_domain, state->mem_ctx, &cli, &dom_pol); if (!NT_STATUS_IS_OK(result)) { DEBUG(1, ("could not get SAM handle on DC for %s\n", domain)); goto done; } 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: state->response.data.auth.nt_status = NT_STATUS_V(result); fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result)); fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result)); state->response.data.auth.pam_error = nt_status_to_pam(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; }