source4/lib/cmdline/popt_credentials.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Credentials popt routines
   4
   5    Copyright (C) Jelmer Vernooij 2002,2003,2005
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "lib/cmdline/popt_common.h"
  23 #include "lib/cmdline/credentials.h"
  24 #include "auth/credentials/credentials.h"
  25 #include "auth/gensec/gensec.h"
  26 #include "param/param.h"
  27
  28 /* Handle command line options:
  29  *              -U,--user
  30  *              -A,--authentication-file
  31  *              -k,--use-kerberos
  32  *              -N,--no-pass
  33  *              -S,--signing
  34  *              -P,--machine-pass
  35  *              --simple-bind-dn
  36  *              --password
  37  *              --krb5-ccache
  38  */
  39
  40 static bool dont_ask;
  41 static bool machine_account_pending;
  42
  43 enum opt { OPT_SIMPLE_BIND_DN, OPT_PASSWORD, OPT_KERBEROS, OPT_SIGN, OPT_ENCRYPT, OPT_KRB5_CCACHE };
  44
  45 /*
  46   disable asking for a password
  47 */
  48 void popt_common_dont_ask(void)
  49 {
  50         dont_ask = true;
  51 }
  52
  53 static void popt_common_credentials_callback(poptContext con,
  54                                                 enum poptCallbackReason reason,
  55                                                 const struct poptOption *opt,
  56                                                 const char *arg, const void *data)
  57 {
  58         if (reason == POPT_CALLBACK_REASON_PRE) {
  59                 cmdline_credentials = cli_credentials_init(talloc_autofree_context());
  60                 return;
  61         }
  62
  63         if (reason == POPT_CALLBACK_REASON_POST) {
  64                 cli_credentials_guess(cmdline_credentials, cmdline_lp_ctx);
  65
  66                 if (!dont_ask) {
  67                         cli_credentials_set_cmdline_callbacks(cmdline_credentials);
  68                 }
  69
  70                 if (machine_account_pending) {
  71                         cli_credentials_set_machine_account(cmdline_credentials, cmdline_lp_ctx);
  72                 }
  73
  74                 return;
  75
  76         }
  77
  78         switch(opt->val) {
  79         case 'U':
  80         {
  81                 char *lp;
  82
  83                 cli_credentials_parse_string(cmdline_credentials, arg, CRED_SPECIFIED);
  84                 /* This breaks the abstraction, including the const above */
  85                 if ((lp=strchr_m(arg,'%'))) {
  86                         lp[0]='\0';
  87                         lp++;
  88                         /* Try to prevent this showing up in ps */
  89                         memset(lp,0,strlen(lp));
  90                 }
  91         }
  92         break;
  93
  94         case OPT_PASSWORD:
  95                 cli_credentials_set_password(cmdline_credentials, arg, CRED_SPECIFIED);
  96                 /* Try to prevent this showing up in ps */
  97                 memset(discard_const(arg),0,strlen(arg));
  98                 break;
  99
 100         case 'A':
 101                 cli_credentials_parse_file(cmdline_credentials, arg, CRED_SPECIFIED);
 102                 break;
 103
 104         case 'P':
 105                 /* Later, after this is all over, get the machine account details from the secrets.ldb */
 106                 machine_account_pending = true;
 107                 break;
 108
 109         case OPT_KERBEROS:
 110         {
 111                 bool use_kerberos = true;
 112                 /* Force us to only use kerberos */
 113                 if (arg) {
 114                         if (!set_boolean(arg, &use_kerberos)) {
 115                                 fprintf(stderr, "Error parsing -k %s. Should be "
 116                                         "-k [yes|no]\n", arg);
 117                                 exit(1);
 118                                 break;
 119                         }
 120                 }
 121
 122                 cli_credentials_set_kerberos_state(cmdline_credentials,
 123                                                    use_kerberos
 124                                                    ? CRED_MUST_USE_KERBEROS
 125                                                    : CRED_DONT_USE_KERBEROS);
 126                 break;
 127         }
 128
 129         case OPT_SIMPLE_BIND_DN:
 130         {
 131                 cli_credentials_set_bind_dn(cmdline_credentials, arg);
 132                 break;
 133         }
 134         case OPT_KRB5_CCACHE:
 135         {
 136                 const char *error_string;
 137                 if (cli_credentials_set_ccache(cmdline_credentials, cmdline_lp_ctx, arg, CRED_SPECIFIED,
 138                                                &error_string) != 0) {
 139                         fprintf(stderr, "Error reading krb5 credentials cache: '%s' %s", arg, error_string);
 140                         exit(1);
 141                 }
 142                 break;
 143         }
 144         case OPT_SIGN:
 145         {
 146                 uint32_t gensec_features;
 147
 148                 gensec_features = cli_credentials_get_gensec_features(cmdline_credentials);
 149
 150                 gensec_features |= GENSEC_FEATURE_SIGN;
 151                 cli_credentials_set_gensec_features(cmdline_credentials,
 152                                                     gensec_features);
 153                 break;
 154         }
 155         case OPT_ENCRYPT:
 156         {
 157                 uint32_t gensec_features;
 158
 159                 gensec_features = cli_credentials_get_gensec_features(cmdline_credentials);
 160
 161                 gensec_features |= GENSEC_FEATURE_SEAL;
 162                 cli_credentials_set_gensec_features(cmdline_credentials,
 163                                                     gensec_features);
 164                 break;
 165         }
 166         }
 167 }
 168
 169
 170
 171 struct poptOption popt_common_credentials4[] = {
 172         { NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE|POPT_CBFLAG_POST, (void *)popt_common_credentials_callback },
 173         { "user", 'U', POPT_ARG_STRING, NULL, 'U', "Set the network username", "[DOMAIN/]USERNAME[%PASSWORD]" },
 174         { "no-pass", 'N', POPT_ARG_NONE, &dont_ask, 'N', "Don't ask for a password" },
 175         { "password", 0, POPT_ARG_STRING, NULL, OPT_PASSWORD, "Password" },
 176         { "authentication-file", 'A', POPT_ARG_STRING, NULL, 'A', "Get the credentials from a file", "FILE" },
 177         { "machine-pass", 'P', POPT_ARG_NONE, NULL, 'P', "Use stored machine account password (implies -k)" },
 178         { "simple-bind-dn", 0, POPT_ARG_STRING, NULL, OPT_SIMPLE_BIND_DN, "DN to use for a simple bind" },
 179         { "kerberos", 'k', POPT_ARG_STRING, NULL, OPT_KERBEROS, "Use Kerberos, -k [yes|no]" },
 180         { "krb5-ccache", 0, POPT_ARG_STRING, NULL, OPT_KRB5_CCACHE, "Credentials cache location for Kerberos" },
 181         { "sign", 'S', POPT_ARG_NONE, NULL, OPT_SIGN, "Sign connection to prevent modification in transit" },
 182         { "encrypt", 'e', POPT_ARG_NONE, NULL, OPT_ENCRYPT, "Encrypt connection for privacy" },
 183         { NULL }
 184 };