source3/libads/util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    krb5 set password implementation
   4    Copyright (C) Remus Koos 2001 (remuskoos@yahoo.com)
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "ads.h"
  22 #include "secrets.h"
  23 #include "librpc/gen_ndr/ndr_secrets.h"
  24
  25 #ifdef HAVE_KRB5
  26 ADS_STATUS ads_change_trust_account_password(ADS_STRUCT *ads, char *host_principal)
  27 {
  28         const char *password = NULL;
  29         const char *new_password = NULL;
  30         ADS_STATUS ret;
  31         const char *domain = lp_workgroup();
  32         struct secrets_domain_info1 *info = NULL;
  33         struct secrets_domain_info1_change *prev = NULL;
  34         const DATA_BLOB *cleartext_blob = NULL;
  35         DATA_BLOB pw_blob = data_blob_null;
  36         DATA_BLOB new_pw_blob = data_blob_null;
  37         NTSTATUS status;
  38         struct timeval tv = timeval_current();
  39         NTTIME now = timeval_to_nttime(&tv);
  40         int role = lp_server_role();
  41         bool ok;
  42
  43         if (role != ROLE_DOMAIN_MEMBER) {
  44                 DBG_ERR("Machine account password change only supported on a DOMAIN_MEMBER.\n");
  45                 return ADS_ERROR_NT(NT_STATUS_INVALID_SERVER_STATE);
  46         }
  47
  48         new_password = trust_pw_new_value(talloc_tos(), SEC_CHAN_WKSTA, SEC_ADS);
  49         if (new_password == NULL) {
  50                 ret = ADS_ERROR_SYSTEM(errno);
  51                 DEBUG(1,("Failed to generate machine password\n"));
  52                 return ret;
  53         }
  54
  55         status = secrets_prepare_password_change(domain,
  56                                                  ads->auth.kdc_server,
  57                                                  new_password,
  58                                                  talloc_tos(),
  59                                                  &info, &prev);
  60         if (!NT_STATUS_IS_OK(status)) {
  61                 return ADS_ERROR_NT(status);
  62         }
  63         if (prev != NULL) {
  64                 status = NT_STATUS_REQUEST_NOT_ACCEPTED;
  65                 secrets_failed_password_change("localhost",
  66                                                status,
  67                                                NT_STATUS_NOT_COMMITTED,
  68                                                info);
  69                 return ADS_ERROR_NT(status);
  70         }
  71
  72         cleartext_blob = &info->password->cleartext_blob;
  73         ok = convert_string_talloc(talloc_tos(), CH_UTF16MUNGED, CH_UNIX,
  74                                    cleartext_blob->data,
  75                                    cleartext_blob->length,
  76                                    (void **)&pw_blob.data,
  77                                    &pw_blob.length);
  78         if (!ok) {
  79                 status = NT_STATUS_UNMAPPABLE_CHARACTER;
  80                 if (errno == ENOMEM) {
  81                         status = NT_STATUS_NO_MEMORY;
  82                 }
  83                 DBG_ERR("convert_string_talloc(CH_UTF16MUNGED, CH_UNIX) "
  84                         "failed for password of %s - %s\n",
  85                         domain, nt_errstr(status));
  86                 return ADS_ERROR_NT(status);
  87         }
  88         password = (const char *)pw_blob.data;
  89
  90         cleartext_blob = &info->next_change->password->cleartext_blob;
  91         ok = convert_string_talloc(talloc_tos(), CH_UTF16MUNGED, CH_UNIX,
  92                                    cleartext_blob->data,
  93                                    cleartext_blob->length,
  94                                    (void **)&new_pw_blob.data,
  95                                    &new_pw_blob.length);
  96         if (!ok) {
  97                 status = NT_STATUS_UNMAPPABLE_CHARACTER;
  98                 if (errno == ENOMEM) {
  99                         status = NT_STATUS_NO_MEMORY;
 100                 }
 101                 DBG_ERR("convert_string_talloc(CH_UTF16MUNGED, CH_UNIX) "
 102                         "failed for new_password of %s - %s\n",
 103                         domain, nt_errstr(status));
 104                 secrets_failed_password_change("localhost",
 105                                                status,
 106                                                NT_STATUS_NOT_COMMITTED,
 107                                                info);
 108                 return ADS_ERROR_NT(status);
 109         }
 110         talloc_keep_secret(new_pw_blob.data);
 111         new_password = (const char *)new_pw_blob.data;
 112
 113         ret = kerberos_set_password(host_principal,
 114                                     password,
 115                                     host_principal,
 116                                     new_password);
 117
 118         if (!ADS_ERR_OK(ret)) {
 119                 status = ads_ntstatus(ret);
 120                 DBG_ERR("kerberos_set_password(%s, %s) "
 121                         "failed for new_password of %s - %s\n",
 122                         ads->auth.kdc_server, host_principal,
 123                         domain, nt_errstr(status));
 124                 secrets_failed_password_change(ads->auth.kdc_server,
 125                                                NT_STATUS_NOT_COMMITTED,
 126                                                status,
 127                                                info);
 128                 return ret;
 129         }
 130
 131         status = secrets_finish_password_change(ads->auth.kdc_server, now, info);
 132         if (!NT_STATUS_IS_OK(status)) {
 133                 DEBUG(1,("Failed to save machine password\n"));
 134                 return ADS_ERROR_NT(status);
 135         }
 136
 137         return ADS_SUCCESS;
 138 }
 139 #endif
 140
 141 /**
 142 * @brief Parses windows style SPN service/host:port/servicename
 143 *      serviceclass - A string that identifies the general class of service
 144 *            e.g. 'http'
 145 *      host - A netbios name or fully-qualified DNS name
 146 *      port - An optional TCP or UDP port number
 147 *      servicename - An optional distinguished name, GUID, DNS name or
 148 *                    DNS name of an SRV or MX record. (not needed for host
 149 *                    based services)
 150 *
 151 * @param[in]  ctx       - Talloc context.
 152 * @param[in]  srvprinc  - The service principal
 153 *
 154 * @return               - struct spn_struct containing the fields parsed or NULL
 155 *                         if srvprinc could not be parsed.
 156 */
 157 struct spn_struct *parse_spn(TALLOC_CTX *ctx, const char *srvprinc)
 158 {
 159         struct spn_struct * result = NULL;
 160         char *tmp = NULL;
 161         char *port_str = NULL;
 162         char *host_str = NULL;
 163
 164         result = talloc_zero(ctx, struct spn_struct);
 165         if (result == NULL) {
 166                 DBG_ERR("Out of memory\n");
 167                 return NULL;
 168         }
 169
 170         result->serviceclass = talloc_strdup(result, srvprinc);
 171         if (result->serviceclass == NULL) {
 172                 DBG_ERR("Out of memory\n");
 173                 goto fail;
 174         }
 175         result->port = -1;
 176
 177         tmp = strchr_m(result->serviceclass, '/');
 178         if (tmp == NULL) {
 179                 /* illegal */
 180                 DBG_ERR("Failed to parse spn %s, no host definition\n",
 181                         srvprinc);
 182                 goto fail;
 183         }
 184
 185         /* terminate service principal */
 186         *tmp = '\0';
 187         tmp++;
 188         host_str = tmp;
 189
 190         tmp = strchr_m(host_str, ':');
 191         if (tmp != NULL) {
 192                 *tmp  = '\0';
 193                 tmp++;
 194                 port_str = tmp;
 195         } else {
 196                 tmp = host_str;
 197         }
 198
 199         tmp = strchr_m(tmp, '/');
 200         if (tmp != NULL) {
 201                 *tmp  = '\0';
 202                 tmp++;
 203                 result->servicename = tmp;
 204         }
 205
 206         if (strlen(host_str) == 0) {
 207                 /* illegal */
 208                 DBG_ERR("Failed to parse spn %s, illegal host definition\n",
 209                         srvprinc);
 210                 goto fail;
 211         }
 212         result->host = host_str;
 213
 214         if (result->servicename != NULL && (strlen(result->servicename) == 0)) {
 215                 DBG_ERR("Failed to parse spn %s, empty servicename "
 216                         "definition\n", srvprinc);
 217                 goto fail;
 218         }
 219         if (port_str != NULL) {
 220                 if (strlen(port_str) == 0) {
 221                         DBG_ERR("Failed to parse spn %s, empty port "
 222                                 "definition\n", srvprinc);
 223                         goto fail;
 224                 }
 225                 result->port = (int32_t)strtol(port_str, NULL, 10);
 226                 if (result->port <= 0
 227                     || result->port > 65535
 228                     || errno == ERANGE) {
 229                         DBG_ERR("Failed to parse spn %s, port number "
 230                                 "conversion failed\n", srvprinc);
 231                         errno = 0;
 232                         goto fail;
 233                 }
 234         }
 235         return result;
 236 fail:
 237         TALLOC_FREE(result);
 238         return NULL;
 239 }