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Diffstat (limited to '')
| -rw-r--r-- | source4/auth/ntlm/auth_winbind.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/source4/auth/ntlm/auth_winbind.c b/source4/auth/ntlm/auth_winbind.c new file mode 100644 index 0000000..719d877 --- /dev/null +++ b/source4/auth/ntlm/auth_winbind.c @@ -0,0 +1,322 @@ +/* + Unix SMB/CIFS implementation. + + Winbind authentication mechnism + + Copyright (C) Tim Potter 2000 + Copyright (C) Andrew Bartlett 2001 - 2002 + Copyright (C) Stefan Metzmacher 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 <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include <tevent.h> +#include "../lib/util/tevent_ntstatus.h" +#include "auth/auth.h" +#include "auth/ntlm/auth_proto.h" +#include "librpc/gen_ndr/ndr_winbind_c.h" +#include "lib/messaging/irpc.h" +#include "param/param.h" +#include "nsswitch/libwbclient/wbclient.h" +#include "auth/auth_sam_reply.h" +#include "libcli/security/security.h" +#include "dsdb/samdb/samdb.h" +#include "auth/auth_sam.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_AUTH + +_PUBLIC_ NTSTATUS auth4_winbind_init(TALLOC_CTX *); + +static NTSTATUS winbind_want_check(struct auth_method_context *ctx, + TALLOC_CTX *mem_ctx, + const struct auth_usersupplied_info *user_info) +{ + if (!user_info->mapped.account_name || !*user_info->mapped.account_name) { + return NT_STATUS_NOT_IMPLEMENTED; + } + + /* TODO: maybe limit the user scope to remote users only */ + return NT_STATUS_OK; +} + +struct winbind_check_password_state { + struct auth_method_context *ctx; + const struct auth_usersupplied_info *user_info; + struct winbind_SamLogon req; + struct auth_user_info_dc *user_info_dc; + bool authoritative; +}; + +static void winbind_check_password_done(struct tevent_req *subreq); + +/* + Authenticate a user with a challenge/response + using IRPC to the winbind task +*/ +static struct tevent_req *winbind_check_password_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct auth_method_context *ctx, + const struct auth_usersupplied_info *user_info) +{ + struct tevent_req *req = NULL; + struct winbind_check_password_state *state = NULL; + NTSTATUS status; + struct dcerpc_binding_handle *irpc_handle; + const struct auth_usersupplied_info *user_info_new; + struct netr_IdentityInfo *identity_info; + struct imessaging_context *msg_ctx; + struct tevent_req *subreq = NULL; + + req = tevent_req_create(mem_ctx, &state, + struct winbind_check_password_state); + if (req == NULL) { + return NULL; + } + state->ctx = ctx; + state->user_info = user_info; + state->authoritative = true; + + msg_ctx = imessaging_client_init(state, ctx->auth_ctx->lp_ctx, ev); + if (msg_ctx == NULL) { + DEBUG(1, ("imessaging_init failed\n")); + tevent_req_nterror(req, NT_STATUS_INVALID_SERVER_STATE); + return tevent_req_post(req, ev); + } + + irpc_handle = irpc_binding_handle_by_name(state, msg_ctx, + "winbind_server", + &ndr_table_winbind); + if (irpc_handle == NULL) { + DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, " + "no winbind_server running!\n", + user_info->client.domain_name, user_info->client.account_name)); + tevent_req_nterror(req, NT_STATUS_NO_LOGON_SERVERS); + return tevent_req_post(req, ev); + } + + /* + * 120 seconds should be enough even for trusted domains. + * + * Currently winbindd has a much lower limit. + * And tests with Windows RODCs show that it + * returns NO_LOGON_SERVERS after 90-100 seconds + * if it can't reach any RWDC. + */ + dcerpc_binding_handle_set_timeout(irpc_handle, 120); + + if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) { + struct netr_PasswordInfo *password_info; + + status = encrypt_user_info(state, ctx->auth_ctx, AUTH_PASSWORD_HASH, + user_info, &user_info_new); + if (tevent_req_nterror(req, status)) { + return tevent_req_post(req, ev); + } + user_info = user_info_new; + + password_info = talloc_zero(state, struct netr_PasswordInfo); + if (tevent_req_nomem(password_info, req)) { + return tevent_req_post(req, ev); + } + + password_info->lmpassword = *user_info->password.hash.lanman; + password_info->ntpassword = *user_info->password.hash.nt; + + identity_info = &password_info->identity_info; + state->req.in.logon_level = 1; + state->req.in.logon.password= password_info; + } else { + struct netr_NetworkInfo *network_info; + uint8_t chal[8]; + + status = encrypt_user_info(state, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE, + user_info, &user_info_new); + if (tevent_req_nterror(req, status)) { + return tevent_req_post(req, ev); + } + user_info = user_info_new; + + network_info = talloc_zero(state, struct netr_NetworkInfo); + if (tevent_req_nomem(network_info, req)) { + return tevent_req_post(req, ev); + } + + status = auth_get_challenge(ctx->auth_ctx, chal); + if (tevent_req_nterror(req, status)) { + return tevent_req_post(req, ev); + } + + memcpy(network_info->challenge, chal, sizeof(network_info->challenge)); + + network_info->nt.length = user_info->password.response.nt.length; + network_info->nt.data = user_info->password.response.nt.data; + + network_info->lm.length = user_info->password.response.lanman.length; + network_info->lm.data = user_info->password.response.lanman.data; + + identity_info = &network_info->identity_info; + state->req.in.logon_level = 2; + state->req.in.logon.network = network_info; + } + + identity_info->domain_name.string = user_info->client.domain_name; + identity_info->parameter_control = user_info->logon_parameters; /* see MSV1_0_* */ + identity_info->logon_id = user_info->logon_id; + identity_info->account_name.string = user_info->client.account_name; + identity_info->workstation.string = user_info->workstation_name; + + state->req.in.validation_level = 6; + + subreq = dcerpc_winbind_SamLogon_r_send(state, ev, irpc_handle, + &state->req); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, + winbind_check_password_done, + req); + + return req; +} + +static void winbind_check_password_done(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + struct winbind_check_password_state *state = + tevent_req_data(req, + struct winbind_check_password_state); + struct auth_method_context *ctx = state->ctx; + const struct auth_usersupplied_info *user_info = state->user_info; + struct ldb_dn *domain_dn = NULL; + const char *nt4_domain = NULL; + const char *nt4_account = NULL; + struct ldb_message *msg = NULL; + NTSTATUS status; + + status = dcerpc_winbind_SamLogon_r_recv(subreq, state); + if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) { + status = NT_STATUS_NO_LOGON_SERVERS; + } + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + status = state->req.out.result; + if (!NT_STATUS_IS_OK(status)) { + if (!state->req.out.authoritative) { + state->authoritative = false; + } + tevent_req_nterror(req, status); + return; + } + + status = make_user_info_dc_netlogon_validation(state, + user_info->client.account_name, + state->req.in.validation_level, + &state->req.out.validation, + true, /* This user was authenticated */ + &state->user_info_dc); + if (tevent_req_nterror(req, status)) { + return; + } + + nt4_domain = state->user_info_dc->info->domain_name; + nt4_account = state->user_info_dc->info->account_name; + + if (lpcfg_is_mydomain(ctx->auth_ctx->lp_ctx, nt4_domain)) { + domain_dn = ldb_get_default_basedn(ctx->auth_ctx->sam_ctx); + } + + if (domain_dn != NULL) { + /* + * At best, reset the badPwdCount to 0 if the account exists. + * This means that lockouts happen at a badPwdCount earlier than + * normal, but makes it more fault tolerant. + */ + status = authsam_search_account(state, ctx->auth_ctx->sam_ctx, + nt4_account, domain_dn, &msg); + if (NT_STATUS_IS_OK(status)) { + status = authsam_logon_success_accounting( + ctx->auth_ctx->sam_ctx, msg, + domain_dn, + user_info->flags & USER_INFO_INTERACTIVE_LOGON, + NULL, NULL); + if (tevent_req_nterror(req, status)) { + return; + } + } + } + + /* + * We need to expand group memberships within our local domain, + * as the token might be generated by a trusted domain, unless we're + * an RODC. + */ + status = authsam_update_user_info_dc(state->user_info_dc, + ctx->auth_ctx->sam_ctx, + state->user_info_dc); + if (tevent_req_nterror(req, status)) { + return; + } + + tevent_req_done(req); +} + +static NTSTATUS winbind_check_password_recv(struct tevent_req *req, + TALLOC_CTX *mem_ctx, + struct auth_user_info_dc **user_info_dc, + bool *pauthoritative) +{ + struct winbind_check_password_state *state = + tevent_req_data(req, + struct winbind_check_password_state); + NTSTATUS status = NT_STATUS_OK; + + *pauthoritative = state->authoritative; + + if (tevent_req_is_nterror(req, &status)) { + tevent_req_received(req); + return status; + } + + *user_info_dc = talloc_move(mem_ctx, &state->user_info_dc); + + tevent_req_received(req); + return NT_STATUS_OK; +} + +static const struct auth_operations winbind_ops = { + .name = "winbind", + .want_check = winbind_want_check, + .check_password_send = winbind_check_password_send, + .check_password_recv = winbind_check_password_recv +}; + +_PUBLIC_ NTSTATUS auth4_winbind_init(TALLOC_CTX *ctx) +{ + NTSTATUS ret; + + ret = auth_register(ctx, &winbind_ops); + if (!NT_STATUS_IS_OK(ret)) { + DEBUG(0,("Failed to register 'winbind' auth backend!\n")); + return ret; + } + + return NT_STATUS_OK; +} |