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(ads->auth.kdc_server, host_principal, password, host_principal, new_password, ads->auth.time_offset);
 114
 115         if (!ADS_ERR_OK(ret)) {
 116                 status = ads_ntstatus(ret);
 117                 DBG_ERR("kerberos_set_password(%s, %s) "
 118                         "failed for new_password of %s - %s\n",
 119                         ads->auth.kdc_server, host_principal,
 120                         domain, nt_errstr(status));
 121                 secrets_failed_password_change(ads->auth.kdc_server,
 122                                                NT_STATUS_NOT_COMMITTED,
 123                                                status,
 124                                                info);
 125                 return ret;
 126         }
 127
 128         status = secrets_finish_password_change(ads->auth.kdc_server, now, info);
 129         if (!NT_STATUS_IS_OK(status)) {
 130                 DEBUG(1,("Failed to save machine password\n"));
 131                 return ADS_ERROR_NT(status);
 132         }
 133
 134         return ADS_SUCCESS;
 135 }
 136 #endif
 137
 138 /**
 139 * @brief Parses windows style SPN service/host:port/servicename
 140 *      serviceclass - A string that identifies the general class of service
 141 *            e.g. 'http'
 142 *      host - A netbios name or fully-qualified DNS name
 143 *      port - An optional TCP or UDP port number
 144 *      servicename - An optional distinguished name, GUID, DNS name or
 145 *                    DNS name of an SRV or MX record. (not needed for host
 146 *                    based services)
 147 *
 148 * @param[in]  ctx       - Talloc context.
 149 * @param[in]  srvprinc  - The service principal
 150 *
 151 * @return               - struct spn_struct containing the fields parsed or NULL
 152 *                         if srvprinc could not be parsed.
 153 */
 154 struct spn_struct *parse_spn(TALLOC_CTX *ctx, const char *srvprinc)
 155 {
 156         struct spn_struct * result = NULL;
 157         char *tmp = NULL;
 158         char *port_str = NULL;
 159         char *host_str = NULL;
 160
 161         result = talloc_zero(ctx, struct spn_struct);
 162         if (result == NULL) {
 163                 DBG_ERR("Out of memory\n");
 164                 return NULL;
 165         }
 166
 167         result->serviceclass = talloc_strdup(result, srvprinc);
 168         if (result->serviceclass == NULL) {
 169                 DBG_ERR("Out of memory\n");
 170                 goto fail;
 171         }
 172         result->port = -1;
 173
 174         tmp = strchr_m(result->serviceclass, '/');
 175         if (tmp == NULL) {
 176                 /* illegal */
 177                 DBG_ERR("Failed to parse spn %s, no host definition\n",
 178                         srvprinc);
 179                 goto fail;
 180         }
 181
 182         /* terminate service principal */
 183         *tmp = '\0';
 184         tmp++;
 185         host_str = tmp;
 186
 187         tmp = strchr_m(host_str, ':');
 188         if (tmp != NULL) {
 189                 *tmp  = '\0';
 190                 tmp++;
 191                 port_str = tmp;
 192         } else {
 193                 tmp = host_str;
 194         }
 195
 196         tmp = strchr_m(tmp, '/');
 197         if (tmp != NULL) {
 198                 *tmp  = '\0';
 199                 tmp++;
 200                 result->servicename = tmp;
 201         }
 202
 203         if (strlen(host_str) == 0) {
 204                 /* illegal */
 205                 DBG_ERR("Failed to parse spn %s, illegal host definition\n",
 206                         srvprinc);
 207                 goto fail;
 208         }
 209         result->host = host_str;
 210
 211         if (result->servicename != NULL && (strlen(result->servicename) == 0)) {
 212                 DBG_ERR("Failed to parse spn %s, empty servicename "
 213                         "definition\n", srvprinc);
 214                 goto fail;
 215         }
 216         if (port_str != NULL) {
 217                 if (strlen(port_str) == 0) {
 218                         DBG_ERR("Failed to parse spn %s, empty port "
 219                                 "definition\n", srvprinc);
 220                         goto fail;
 221                 }
 222                 result->port = (int32_t)strtol(port_str, NULL, 10);
 223                 if (result->port <= 0
 224                     || result->port > 65535
 225                     || errno == ERANGE) {
 226                         DBG_ERR("Failed to parse spn %s, port number "
 227                                 "conversion failed\n", srvprinc);
 228                         errno = 0;
 229                         goto fail;
 230                 }
 231         }
 232         return result;
 233 fail:
 234         TALLOC_FREE(result);
 235         return NULL;
 236 }