diff options
Diffstat (limited to 'source4')
| -rw-r--r-- | source4/auth/auth_domain.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/source4/auth/auth_domain.c b/source4/auth/auth_domain.c new file mode 100644 index 0000000000..86669b9b30 --- /dev/null +++ b/source4/auth/auth_domain.c @@ -0,0 +1,199 @@ +/* + Unix SMB/CIFS implementation. + + Authenticate a user to a domain controller + + Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005 + Copyright (C) Andrew Tridgell 2004 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "librpc/gen_ndr/ndr_netlogon.h" +#include "include/secrets.h" +#include "lib/ldb/include/ldb.h" +#include "auth/auth.h" + +/* Authenticate a user with a challenge/response */ +static NTSTATUS domain_check_password(struct auth_method_context *ctx, + TALLOC_CTX *mem_ctx, + const struct auth_usersupplied_info *user_info, + struct auth_serversupplied_info **server_info) +{ + NTSTATUS status; + + struct dcerpc_pipe *p; + struct dcerpc_binding *b; + struct netr_LogonSamLogon r; + struct netr_Authenticator auth, auth2; + struct netr_NetworkInfo ninfo; + const char *machine_account; + const char *password; + struct ldb_context *ldb; + int ldb_ret; + struct ldb_message **msgs; + const char *base_dn = SECRETS_PRIMARY_DOMAIN_DN; + const char *attrs[] = { + "secret", + "samAccountName", + NULL + }; + + struct creds_CredentialState *creds; + struct cli_credentials *credentials; + + const char **bindings = lp_passwordserver(); + const char *binding; + + if (bindings && bindings[0]) { + binding = bindings[0]; + } + + credentials = cli_credentials_init(mem_ctx); + + /* Fetch join password */ + + /* Local secrets are stored in secrets.ldb */ + ldb = secrets_db_connect(mem_ctx); + if (!ldb) { + return NT_STATUS_CANT_ACCESS_DOMAIN_INFO; + } + + /* search for the secret record */ + ldb_ret = samdb_search(ldb, + mem_ctx, base_dn, &msgs, attrs, + "(&(flatname=%s)(objectclass=primaryDomain))", + lp_workgroup()); + if (ldb_ret == 0) { + DEBUG(1, ("Could not find join record to domain: %s\n", + lp_workgroup())); + return NT_STATUS_CANT_ACCESS_DOMAIN_INFO; + } else if (ldb_ret != 1) { + DEBUG(1, ("Found %d records matching flatname=%s under DN %s\n", ldb_ret, + lp_workgroup(), base_dn)); + return NT_STATUS_INTERNAL_ERROR; + } + + password = ldb_msg_find_string(msgs[0], "secret", NULL); + if (!password) { + DEBUG(1, ("Could not find 'secret' in join record to domain: %s\n", + lp_workgroup())); + return NT_STATUS_CANT_ACCESS_DOMAIN_INFO; + } + + machine_account = ldb_msg_find_string(msgs[0], "samAccountName", NULL); + if (!machine_account) { + DEBUG(1, ("Could not find 'samAccountName' in join record to domain: %s\n", + lp_workgroup())); + return NT_STATUS_CANT_ACCESS_DOMAIN_INFO; + } + + cli_credentials_set_domain(credentials, lp_workgroup(), CRED_SPECIFIED); + cli_credentials_set_username(credentials, machine_account, CRED_SPECIFIED); + cli_credentials_set_password(credentials, password, CRED_SPECIFIED); + + cli_credentials_guess(credentials); + + /* Connect to DC (take a binding string for now) */ + + status = dcerpc_parse_binding(mem_ctx, binding, &b); + if (!NT_STATUS_IS_OK(status)) { + printf("Bad binding string %s\n", binding); + return NT_STATUS_INVALID_PARAMETER; + } + + /* We like schannel */ + b->flags &= ~DCERPC_AUTH_OPTIONS; + b->flags |= DCERPC_SCHANNEL_WORKSTATION | DCERPC_SEAL | DCERPC_SCHANNEL_128; + + /* Setup schannel */ + status = dcerpc_pipe_connect_b(mem_ctx, &p, b, + DCERPC_NETLOGON_UUID, + DCERPC_NETLOGON_VERSION, + credentials); + + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + /* call domain logon */ + + status = dcerpc_schannel_creds(p->conn->security_state.generic_state, mem_ctx, &creds); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + ninfo.identity_info.domain_name.string = user_info->domain_name; + ninfo.identity_info.parameter_control = 0; + ninfo.identity_info.logon_id_low = 0; + ninfo.identity_info.logon_id_high = 0; + ninfo.identity_info.account_name.string = user_info->account_name; + ninfo.identity_info.workstation.string = user_info->workstation_name; + memcpy(ninfo.challenge, ctx->auth_ctx->challenge.data.data, sizeof(ninfo.challenge)); + + ninfo.nt.length = user_info->nt_resp.length; + ninfo.nt.data = user_info->nt_resp.data; + ninfo.lm.length = user_info->lm_resp.length; + ninfo.lm.data = user_info->lm_resp.data; + + r.in.server_name = talloc_asprintf(mem_ctx, "\\\\%s", dcerpc_server_name(p)); + r.in.workstation = creds->computer_name; + r.in.credential = &auth; + r.in.return_authenticator = &auth2; + r.in.logon_level = 2; + r.in.logon.network = &ninfo; + r.in.validation_level = 3; + + ZERO_STRUCT(auth2); + creds_client_authenticator(creds, &auth); + + status = dcerpc_netr_LogonSamLogon(p, mem_ctx, &r); + + if (!creds_client_check(creds, &r.out.return_authenticator->cred)) { + DEBUG(1, ("Credential chaining failed\n")); + return NT_STATUS_ACCESS_DENIED; + } + + /* make server info */ + + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + status = make_server_info_netlogon_validation(mem_ctx, + user_info->account_name, + r.in.validation_level, &r.out.validation, + server_info); + return status; +} + +static const struct auth_operations domain_ops = { + .name = "domain", + .get_challenge = auth_get_challenge_not_implemented, + .check_password = domain_check_password +}; + +NTSTATUS auth_domain_init(void) +{ + NTSTATUS ret; + + ret = auth_register(&domain_ops); + if (!NT_STATUS_IS_OK(ret)) { + DEBUG(0,("Failed to register 'domain' auth backend!\n")); + return ret; + } + return ret; +} |