1/* 2 Unix SMB/CIFS implementation. 3 Authenticate by using a remote server 4 Copyright (C) Andrew Bartlett 2001-2002, 2008 5 Copyright (C) Jelmer Vernooij 2002 6 Copyright (C) Stefan Metzmacher 2005 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. 20*/ 21 22#include "includes.h" 23#include "auth/auth.h" 24#include "auth/ntlm/auth_proto.h" 25#include "auth/credentials/credentials.h" 26#include "libcli/security/security.h" 27#include "librpc/gen_ndr/ndr_samr.h" 28#include "libcli/smb_composite/smb_composite.h" 29#include "param/param.h" 30#include "libcli/resolve/resolve.h" 31 32/* This version of 'security=server' rewirtten from scratch for Samba4 33 * libraries in 2008 */ 34 35 36static NTSTATUS server_want_check(struct auth_method_context *ctx, 37 TALLOC_CTX *mem_ctx, 38 const struct auth_usersupplied_info *user_info) 39{ 40 return NT_STATUS_OK; 41} 42/** 43 * The challenge from the target server, when operating in security=server 44 **/ 45static NTSTATUS server_get_challenge(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, DATA_BLOB *_blob) 46{ 47 struct smb_composite_connect io; 48 struct smbcli_options smb_options; 49 const char **host_list; 50 NTSTATUS status; 51 52 /* Make a connection to the target server, found by 'password server' in smb.conf */ 53 54 lp_smbcli_options(ctx->auth_ctx->lp_ctx, &smb_options); 55 56 /* Make a negprot, WITHOUT SPNEGO, so we get a challenge nice an easy */ 57 io.in.options.use_spnego = false; 58 59 /* Hope we don't get * (the default), as this won't work... */ 60 host_list = lp_passwordserver(ctx->auth_ctx->lp_ctx); 61 if (!host_list) { 62 return NT_STATUS_INTERNAL_ERROR; 63 } 64 io.in.dest_host = host_list[0]; 65 if (strequal(io.in.dest_host, "*")) { 66 return NT_STATUS_INTERNAL_ERROR; 67 } 68 io.in.dest_ports = lp_smb_ports(ctx->auth_ctx->lp_ctx); 69 io.in.socket_options = lp_socket_options(ctx->auth_ctx->lp_ctx); 70 io.in.gensec_settings = lp_gensec_settings(mem_ctx, ctx->auth_ctx->lp_ctx); 71 72 io.in.called_name = strupper_talloc(mem_ctx, io.in.dest_host); 73 74 /* We don't want to get as far as the session setup */ 75 io.in.credentials = cli_credentials_init_anon(mem_ctx); 76 cli_credentials_set_workstation(io.in.credentials, 77 lp_netbios_name(ctx->auth_ctx->lp_ctx), 78 CRED_SPECIFIED); 79 80 io.in.service = NULL; 81 82 io.in.workgroup = ""; /* only used with SPNEGO, disabled above */ 83 84 io.in.options = smb_options; 85 86 io.in.iconv_convenience = lp_iconv_convenience(ctx->auth_ctx->lp_ctx); 87 lp_smbcli_session_options(ctx->auth_ctx->lp_ctx, &io.in.session_options); 88 89 status = smb_composite_connect(&io, mem_ctx, lp_resolve_context(ctx->auth_ctx->lp_ctx), 90 ctx->auth_ctx->event_ctx); 91 NT_STATUS_NOT_OK_RETURN(status); 92 93 *_blob = io.out.tree->session->transport->negotiate.secblob; 94 ctx->private_data = talloc_steal(ctx, io.out.tree->session); 95 return NT_STATUS_OK; 96} 97 98/** 99 * Return an error based on username 100 * 101 * This function allows the testing of obsure errors, as well as the generation 102 * of NT_STATUS -> DOS error mapping tables. 103 * 104 * This module is of no value to end-users. 105 * 106 * The password is ignored. 107 * 108 * @return An NTSTATUS value based on the username 109 **/ 110 111static NTSTATUS server_check_password(struct auth_method_context *ctx, 112 TALLOC_CTX *mem_ctx, 113 const struct auth_usersupplied_info *user_info, 114 struct auth_serversupplied_info **_server_info) 115{ 116 NTSTATUS nt_status; 117 struct auth_serversupplied_info *server_info; 118 struct cli_credentials *creds; 119 struct smb_composite_sesssetup session_setup; 120 121 struct smbcli_session *session = talloc_get_type(ctx->private_data, struct smbcli_session); 122 123 creds = cli_credentials_init(mem_ctx); 124 125 NT_STATUS_HAVE_NO_MEMORY(creds); 126 127 cli_credentials_set_username(creds, user_info->client.account_name, CRED_SPECIFIED); 128 cli_credentials_set_domain(creds, user_info->client.domain_name, CRED_SPECIFIED); 129 130 switch (user_info->password_state) { 131 case AUTH_PASSWORD_PLAIN: 132 cli_credentials_set_password(creds, user_info->password.plaintext, 133 CRED_SPECIFIED); 134 break; 135 case AUTH_PASSWORD_HASH: 136 cli_credentials_set_nt_hash(creds, user_info->password.hash.nt, 137 CRED_SPECIFIED); 138 break; 139 140 case AUTH_PASSWORD_RESPONSE: 141 cli_credentials_set_ntlm_response(creds, &user_info->password.response.lanman, &user_info->password.response.nt, CRED_SPECIFIED); 142 break; 143 } 144 145 session_setup.in.sesskey = session->transport->negotiate.sesskey; 146 session_setup.in.capabilities = session->transport->negotiate.capabilities; 147 148 session_setup.in.credentials = creds; 149 session_setup.in.workgroup = ""; /* Only used with SPNEGO, which we are not doing */ 150 session_setup.in.gensec_settings = lp_gensec_settings(session, ctx->auth_ctx->lp_ctx); 151 152 /* Check password with remove server - this should be async some day */ 153 nt_status = smb_composite_sesssetup(session, &session_setup); 154 155 if (!NT_STATUS_IS_OK(nt_status)) { 156 return nt_status; 157 } 158 159 server_info = talloc(mem_ctx, struct auth_serversupplied_info); 160 NT_STATUS_HAVE_NO_MEMORY(server_info); 161 162 server_info->account_sid = dom_sid_parse_talloc(server_info, SID_NT_ANONYMOUS); 163 NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid); 164 165 /* is this correct? */ 166 server_info->primary_group_sid = dom_sid_parse_talloc(server_info, SID_BUILTIN_GUESTS); 167 NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid); 168 169 server_info->n_domain_groups = 0; 170 server_info->domain_groups = NULL; 171 172 /* annoying, but the Anonymous really does have a session key, 173 and it is all zeros! */ 174 server_info->user_session_key = data_blob(NULL, 0); 175 server_info->lm_session_key = data_blob(NULL, 0); 176 177 server_info->account_name = talloc_strdup(server_info, user_info->client.account_name); 178 NT_STATUS_HAVE_NO_MEMORY(server_info->account_name); 179 180 server_info->domain_name = talloc_strdup(server_info, user_info->client.domain_name); 181 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name); 182 183 server_info->full_name = NULL; 184 185 server_info->logon_script = talloc_strdup(server_info, ""); 186 NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script); 187 188 server_info->profile_path = talloc_strdup(server_info, ""); 189 NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path); 190 191 server_info->home_directory = talloc_strdup(server_info, ""); 192 NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory); 193 194 server_info->home_drive = talloc_strdup(server_info, ""); 195 NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive); 196 197 server_info->last_logon = 0; 198 server_info->last_logoff = 0; 199 server_info->acct_expiry = 0; 200 server_info->last_password_change = 0; 201 server_info->allow_password_change = 0; 202 server_info->force_password_change = 0; 203 204 server_info->logon_count = 0; 205 server_info->bad_password_count = 0; 206 207 server_info->acct_flags = ACB_NORMAL; 208 209 server_info->authenticated = false; 210 211 *_server_info = server_info; 212 213 return nt_status; 214} 215 216static const struct auth_operations server_auth_ops = { 217 .name = "server", 218 .get_challenge = server_get_challenge, 219 .want_check = server_want_check, 220 .check_password = server_check_password 221}; 222 223_PUBLIC_ NTSTATUS auth_server_init(void) 224{ 225 NTSTATUS ret; 226 227 ret = auth_register(&server_auth_ops); 228 if (!NT_STATUS_IS_OK(ret)) { 229 DEBUG(0,("Failed to register 'server' auth backend!\n")); 230 return ret; 231 } 232 233 return ret; 234} 235