src/common.c

   1 /*
   2  * Copyright (C) 2000-2012 Free Software Foundation, Inc.
   3  * Author: Nikos Mavrogiannopoulos
   4  *
   5  * This file is part of GnuTLS.
   6  *
   7  * GnuTLS 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  * GnuTLS 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 <config.h>
  22
  23 /* Work around problem reported in
  24    <http://permalink.gmane.org/gmane.comp.lib.gnulib.bugs/15755>.*/
  25 #if GETTIMEOFDAY_CLOBBERS_LOCALTIME
  26 #undef localtime
  27 #endif
  28
  29 #include <getpass.h>
  30
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <gnutls/gnutls.h>
  35 #include <gnutls/x509.h>
  36 #include <gnutls/openpgp.h>
  37 #include <gnutls/crypto.h>
  38 #include <time.h>
  39 #include <common.h>
  40
  41 #ifdef ENABLE_PKCS11
  42 # include <gnutls/pkcs11.h>
  43 #endif
  44
  45 #define SU(x) (x!=NULL?x:"Unknown")
  46
  47 const char str_unknown[] = "(unknown)";
  48
  49 /* Hex encodes the given data.
  50  */
  51 const char *
  52 raw_to_string (const unsigned char *raw, size_t raw_size)
  53 {
  54     static char buf[1024];
  55     size_t i;
  56     if (raw_size == 0)
  57         return "(empty)";
  58
  59     if (raw_size * 3 + 1 >= sizeof (buf))
  60         return "(too large)";
  61
  62     for (i = 0; i < raw_size; i++)
  63       {
  64           sprintf (&(buf[i * 3]), "%02X%s", raw[i],
  65                    (i == raw_size - 1) ? "" : ":");
  66       }
  67     buf[sizeof (buf) - 1] = '\0';
  68
  69     return buf;
  70 }
  71
  72 static void
  73 print_x509_info_compact (gnutls_session_t session)
  74 {
  75     gnutls_x509_crt_t crt;
  76     const gnutls_datum_t *cert_list;
  77     unsigned int cert_list_size = 0;
  78     int ret;
  79     gnutls_datum_t cinfo;
  80
  81     cert_list = gnutls_certificate_get_peers (session, &cert_list_size);
  82     if (cert_list_size == 0)
  83       {
  84           fprintf (stderr, "No certificates found!\n");
  85           return;
  86       }
  87
  88     gnutls_x509_crt_init (&crt);
  89     ret =
  90           gnutls_x509_crt_import (crt, &cert_list[0],
  91                                   GNUTLS_X509_FMT_DER);
  92     if (ret < 0)
  93       {
  94         fprintf (stderr, "Decoding error: %s\n",
  95                  gnutls_strerror (ret));
  96         return;
  97       }
  98
  99     ret =
 100       gnutls_x509_crt_print (crt, GNUTLS_CRT_PRINT_COMPACT, &cinfo);
 101     if (ret == 0)
 102       {
 103         printf ("- X.509 cert: %s\n", cinfo.data);
 104         gnutls_free (cinfo.data);
 105       }
 106
 107     gnutls_x509_crt_deinit (crt);
 108 }
 109
 110 static void
 111 print_x509_info (gnutls_session_t session, int flag, int print_cert)
 112 {
 113     gnutls_x509_crt_t crt;
 114     const gnutls_datum_t *cert_list;
 115     unsigned int cert_list_size = 0, j;
 116     int ret;
 117
 118     cert_list = gnutls_certificate_get_peers (session, &cert_list_size);
 119     if (cert_list_size == 0)
 120       {
 121           fprintf (stderr, "No certificates found!\n");
 122           return;
 123       }
 124
 125     printf ("- Certificate type: X.509\n");
 126     printf ("- Got a certificate list of %d certificates.\n",
 127             cert_list_size);
 128
 129     for (j = 0; j < cert_list_size; j++)
 130       {
 131           gnutls_datum_t cinfo;
 132
 133           gnutls_x509_crt_init (&crt);
 134           ret =
 135               gnutls_x509_crt_import (crt, &cert_list[j],
 136                                       GNUTLS_X509_FMT_DER);
 137           if (ret < 0)
 138             {
 139                 fprintf (stderr, "Decoding error: %s\n",
 140                          gnutls_strerror (ret));
 141                 return;
 142             }
 143
 144           printf ("- Certificate[%d] info:\n - ", j);
 145           if (flag == GNUTLS_CRT_PRINT_COMPACT && j > 0) flag = GNUTLS_CRT_PRINT_ONELINE;
 146
 147           ret =
 148             gnutls_x509_crt_print (crt, flag, &cinfo);
 149           if (ret == 0)
 150             {
 151                 printf ("%s\n", cinfo.data);
 152                 gnutls_free (cinfo.data);
 153             }
 154
 155           if (print_cert)
 156             {
 157                 size_t size = 0;
 158                 char *p = NULL;
 159
 160                 ret =
 161                     gnutls_x509_crt_export (crt, GNUTLS_X509_FMT_PEM, p,
 162                                             &size);
 163                 if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
 164                   {
 165                       p = malloc (size+1);
 166                       if (!p)
 167                         {
 168                             fprintf (stderr, "gnutls_malloc\n");
 169                             exit (1);
 170                         }
 171
 172                       ret =
 173                           gnutls_x509_crt_export (crt, GNUTLS_X509_FMT_PEM,
 174                                                   p, &size);
 175                   }
 176                 if (ret < 0)
 177                   {
 178                       fprintf (stderr, "Encoding error: %s\n",
 179                                gnutls_strerror (ret));
 180                       return;
 181                   }
 182
 183                 p[size] = 0;
 184                 fputs ("\n", stdout);
 185                 fputs (p, stdout);
 186                 fputs ("\n", stdout);
 187
 188                 gnutls_free (p);
 189             }
 190
 191           gnutls_x509_crt_deinit (crt);
 192       }
 193 }
 194
 195 #ifdef ENABLE_OPENPGP
 196 static void
 197 print_openpgp_info_compact (gnutls_session_t session)
 198 {
 199
 200     gnutls_openpgp_crt_t crt;
 201     const gnutls_datum_t *cert_list;
 202     unsigned int cert_list_size = 0;
 203     int ret;
 204
 205     cert_list = gnutls_certificate_get_peers (session, &cert_list_size);
 206
 207     if (cert_list_size > 0)
 208       {
 209           gnutls_datum_t cinfo;
 210
 211           gnutls_openpgp_crt_init (&crt);
 212           ret = gnutls_openpgp_crt_import (crt, &cert_list[0],
 213                                            GNUTLS_OPENPGP_FMT_RAW);
 214           if (ret < 0)
 215             {
 216                 fprintf (stderr, "Decoding error: %s\n",
 217                          gnutls_strerror (ret));
 218                 return;
 219             }
 220
 221           ret =
 222               gnutls_openpgp_crt_print (crt, GNUTLS_CRT_PRINT_COMPACT, &cinfo);
 223           if (ret == 0)
 224             {
 225                 printf ("- OpenPGP cert: %s\n", cinfo.data);
 226                 gnutls_free (cinfo.data);
 227             }
 228
 229           gnutls_openpgp_crt_deinit (crt);
 230       }
 231 }
 232
 233 static void
 234 print_openpgp_info (gnutls_session_t session, int flag, int print_cert)
 235 {
 236
 237     gnutls_openpgp_crt_t crt;
 238     const gnutls_datum_t *cert_list;
 239     unsigned int cert_list_size = 0;
 240     int ret;
 241
 242     printf ("- Certificate type: OpenPGP\n");
 243
 244     cert_list = gnutls_certificate_get_peers (session, &cert_list_size);
 245
 246     if (cert_list_size > 0)
 247       {
 248           gnutls_datum_t cinfo;
 249
 250           gnutls_openpgp_crt_init (&crt);
 251           ret = gnutls_openpgp_crt_import (crt, &cert_list[0],
 252                                            GNUTLS_OPENPGP_FMT_RAW);
 253           if (ret < 0)
 254             {
 255                 fprintf (stderr, "Decoding error: %s\n",
 256                          gnutls_strerror (ret));
 257                 return;
 258             }
 259
 260           ret =
 261               gnutls_openpgp_crt_print (crt, flag, &cinfo);
 262           if (ret == 0)
 263             {
 264                 printf ("- %s\n", cinfo.data);
 265                 gnutls_free (cinfo.data);
 266             }
 267
 268           if (print_cert)
 269             {
 270                 size_t size = 0;
 271                 char *p = NULL;
 272
 273                 ret =
 274                     gnutls_openpgp_crt_export (crt,
 275                                                GNUTLS_OPENPGP_FMT_BASE64,
 276                                                p, &size);
 277                 if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
 278                   {
 279                       p = malloc (size);
 280                       if (!p)
 281                         {
 282                             fprintf (stderr, "gnutls_malloc\n");
 283                             exit (1);
 284                         }
 285
 286                       ret =
 287                           gnutls_openpgp_crt_export (crt,
 288                                                      GNUTLS_OPENPGP_FMT_BASE64,
 289                                                      p, &size);
 290                   }
 291                 if (ret < 0)
 292                   {
 293                       fprintf (stderr, "Encoding error: %s\n",
 294                                gnutls_strerror (ret));
 295                       return;
 296                   }
 297
 298                 fputs (p, stdout);
 299                 fputs ("\n", stdout);
 300
 301                 gnutls_free (p);
 302             }
 303
 304           gnutls_openpgp_crt_deinit (crt);
 305       }
 306 }
 307
 308 #endif
 309
 310 /* returns false (0) if not verified, or true (1) otherwise
 311  */
 312 int
 313 cert_verify (gnutls_session_t session, const char* hostname)
 314 {
 315     int rc;
 316     unsigned int status = 0;
 317     gnutls_datum_t out;
 318     int type;
 319
 320     rc = gnutls_certificate_verify_peers3 (session, hostname, &status);
 321     if (rc == GNUTLS_E_NO_CERTIFICATE_FOUND)
 322       {
 323           printf ("- Peer did not send any certificate.\n");
 324           return 0;
 325       }
 326
 327     if (rc < 0)
 328       {
 329           printf ("- Could not verify certificate (err: %s)\n",
 330                   gnutls_strerror (rc));
 331           return 0;
 332       }
 333
 334     type = gnutls_certificate_type_get (session);
 335     rc = gnutls_certificate_verification_status_print( status, type, &out, 0);
 336     if (rc < 0)
 337       {
 338           printf ("- Could not print verification flags (err: %s)\n",
 339                   gnutls_strerror (rc));
 340           return 0;
 341       }
 342
 343     printf ("- %s", out.data);
 344
 345     gnutls_free(out.data);
 346
 347     if (status)
 348       return 0;
 349
 350     return 1;
 351 }
 352
 353 static void
 354 print_dh_info (gnutls_session_t session, const char *str, int print)
 355 {
 356     printf ("- %sDiffie-Hellman parameters\n", str);
 357     printf (" - Using prime: %d bits\n",
 358             gnutls_dh_get_prime_bits (session));
 359     printf (" - Secret key: %d bits\n",
 360             gnutls_dh_get_secret_bits (session));
 361     printf (" - Peer's public key: %d bits\n",
 362             gnutls_dh_get_peers_public_bits (session));
 363
 364     if (print)
 365       {
 366           int ret;
 367           gnutls_datum_t raw_gen = { NULL, 0 };
 368           gnutls_datum_t raw_prime = { NULL, 0 };
 369           gnutls_dh_params_t dh_params = NULL;
 370           unsigned char *params_data = NULL;
 371           size_t params_data_size = 0;
 372
 373           ret = gnutls_dh_get_group (session, &raw_gen, &raw_prime);
 374           if (ret)
 375             {
 376                 fprintf (stderr, "gnutls_dh_get_group %d\n", ret);
 377                 goto out;
 378             }
 379
 380           ret = gnutls_dh_params_init (&dh_params);
 381           if (ret)
 382             {
 383                 fprintf (stderr, "gnutls_dh_params_init %d\n", ret);
 384                 goto out;
 385             }
 386
 387           ret =
 388               gnutls_dh_params_import_raw (dh_params, &raw_prime,
 389                                            &raw_gen);
 390           if (ret)
 391             {
 392                 fprintf (stderr, "gnutls_dh_params_import_raw %d\n", ret);
 393                 goto out;
 394             }
 395
 396           ret = gnutls_dh_params_export_pkcs3 (dh_params,
 397                                                GNUTLS_X509_FMT_PEM,
 398                                                params_data,
 399                                                &params_data_size);
 400           if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
 401             {
 402                 fprintf (stderr, "gnutls_dh_params_export_pkcs3 %d\n",
 403                          ret);
 404                 goto out;
 405             }
 406
 407           params_data = gnutls_malloc (params_data_size);
 408           if (!params_data)
 409             {
 410                 fprintf (stderr, "gnutls_malloc %d\n", ret);
 411                 goto out;
 412             }
 413
 414           ret = gnutls_dh_params_export_pkcs3 (dh_params,
 415                                                GNUTLS_X509_FMT_PEM,
 416                                                params_data,
 417                                                &params_data_size);
 418           if (ret)
 419             {
 420                 fprintf (stderr, "gnutls_dh_params_export_pkcs3-2 %d\n",
 421                          ret);
 422                 goto out;
 423             }
 424
 425           printf (" - PKCS#3 format:\n\n%.*s\n", (int) params_data_size,
 426                   params_data);
 427
 428         out:
 429           gnutls_free (params_data);
 430           gnutls_free (raw_prime.data);
 431           gnutls_free (raw_gen.data);
 432           gnutls_dh_params_deinit (dh_params);
 433       }
 434 }
 435
 436 static void
 437 print_ecdh_info (gnutls_session_t session, const char *str)
 438 {
 439     int curve;
 440
 441     printf ("- %sEC Diffie-Hellman parameters\n", str);
 442
 443     curve = gnutls_ecc_curve_get (session);
 444
 445     printf (" - Using curve: %s\n", gnutls_ecc_curve_get_name (curve));
 446     printf (" - Curve size: %d bits\n",
 447             gnutls_ecc_curve_get_size (curve) * 8);
 448
 449 }
 450
 451 int
 452 print_info (gnutls_session_t session, int verbose, int print_cert)
 453 {
 454     const char *tmp;
 455     gnutls_credentials_type_t cred;
 456     gnutls_kx_algorithm_t kx;
 457     unsigned char session_id[33];
 458     size_t session_id_size = sizeof (session_id);
 459
 460     /* print session ID */
 461     gnutls_session_get_id (session, session_id, &session_id_size);
 462     printf ("- Session ID: %s\n",
 463             raw_to_string (session_id, session_id_size));
 464
 465     /* print the key exchange's algorithm name
 466      */
 467     kx = gnutls_kx_get (session);
 468
 469     cred = gnutls_auth_get_type (session);
 470     switch (cred)
 471       {
 472 #ifdef ENABLE_ANON
 473       case GNUTLS_CRD_ANON:
 474           if (kx == GNUTLS_KX_ANON_ECDH)
 475               print_ecdh_info (session, "Anonymous ");
 476           else
 477               print_dh_info (session, "Anonymous ", verbose);
 478           break;
 479 #endif
 480 #ifdef ENABLE_SRP
 481       case GNUTLS_CRD_SRP:
 482           /* This should be only called in server
 483            * side.
 484            */
 485           if (gnutls_srp_server_get_username (session) != NULL)
 486               printf ("- SRP authentication. Connected as '%s'\n",
 487                       gnutls_srp_server_get_username (session));
 488           break;
 489 #endif
 490 #ifdef ENABLE_PSK
 491       case GNUTLS_CRD_PSK:
 492           /* This returns NULL in server side.
 493            */
 494           if (gnutls_psk_client_get_hint (session) != NULL)
 495               printf ("- PSK authentication. PSK hint '%s'\n",
 496                       gnutls_psk_client_get_hint (session));
 497           /* This returns NULL in client side.
 498            */
 499           if (gnutls_psk_server_get_username (session) != NULL)
 500               printf ("- PSK authentication. Connected as '%s'\n",
 501                       gnutls_psk_server_get_username (session));
 502           if (kx == GNUTLS_KX_DHE_PSK)
 503               print_dh_info (session, "Ephemeral ", verbose);
 504           if (kx == GNUTLS_KX_ECDHE_PSK)
 505               print_ecdh_info (session, "Ephemeral ");
 506           break;
 507 #endif
 508       case GNUTLS_CRD_IA:
 509           printf ("- TLS/IA authentication\n");
 510           break;
 511       case GNUTLS_CRD_CERTIFICATE:
 512           {
 513               char dns[256];
 514               size_t dns_size = sizeof (dns);
 515               unsigned int type;
 516
 517               /* This fails in client side */
 518               if (gnutls_server_name_get
 519                   (session, dns, &dns_size, &type, 0) == 0)
 520                 {
 521                     printf ("- Given server name[%d]: %s\n", type, dns);
 522                 }
 523           }
 524
 525           if (print_cert)
 526             print_cert_info (session, verbose, print_cert);
 527
 528           if (kx == GNUTLS_KX_DHE_RSA || kx == GNUTLS_KX_DHE_DSS)
 529               print_dh_info (session, "Ephemeral ", verbose);
 530           else if (kx == GNUTLS_KX_ECDHE_RSA
 531                    || kx == GNUTLS_KX_ECDHE_ECDSA)
 532               print_ecdh_info (session, "Ephemeral ");
 533       }
 534
 535     tmp =
 536         SU (gnutls_protocol_get_name
 537             (gnutls_protocol_get_version (session)));
 538     printf ("- Version: %s\n", tmp);
 539
 540     tmp = SU (gnutls_kx_get_name (kx));
 541     printf ("- Key Exchange: %s\n", tmp);
 542
 543     tmp = SU (gnutls_cipher_get_name (gnutls_cipher_get (session)));
 544     printf ("- Cipher: %s\n", tmp);
 545
 546     tmp = SU (gnutls_mac_get_name (gnutls_mac_get (session)));
 547     printf ("- MAC: %s\n", tmp);
 548
 549     tmp =
 550         SU (gnutls_compression_get_name
 551             (gnutls_compression_get (session)));
 552     printf ("- Compression: %s\n", tmp);
 553
 554     if (verbose)
 555       {
 556           gnutls_datum_t cb;
 557           int rc;
 558
 559           rc = gnutls_session_channel_binding (session,
 560                                                GNUTLS_CB_TLS_UNIQUE, &cb);
 561           if (rc)
 562               fprintf (stderr, "Channel binding error: %s\n",
 563                        gnutls_strerror (rc));
 564           else
 565             {
 566                 size_t i;
 567
 568                 printf ("- Channel binding 'tls-unique': ");
 569                 for (i = 0; i < cb.size; i++)
 570                     printf ("%02x", cb.data[i]);
 571                 printf ("\n");
 572             }
 573       }
 574
 575     /* Warning: Do not print anything more here. The 'Compression:'
 576        output MUST be the last non-verbose output.  This is used by
 577        Emacs starttls.el code. */
 578
 579     fflush (stdout);
 580
 581     return 0;
 582 }
 583
 584 void
 585 print_cert_info (gnutls_session_t session, int verbose, int print_cert)
 586 {
 587 int flag;
 588
 589     if (verbose) flag = GNUTLS_CRT_PRINT_FULL;
 590     else flag = GNUTLS_CRT_PRINT_COMPACT;
 591
 592     if (gnutls_certificate_client_get_request_status (session) != 0)
 593         printf ("- Server has requested a certificate.\n");
 594
 595     switch (gnutls_certificate_type_get (session))
 596       {
 597       case GNUTLS_CRT_X509:
 598           print_x509_info (session, flag, print_cert);
 599           break;
 600 #ifdef ENABLE_OPENPGP
 601       case GNUTLS_CRT_OPENPGP:
 602           print_openpgp_info (session, flag, print_cert);
 603           break;
 604 #endif
 605       default:
 606           printf ("Unknown type\n");
 607           break;
 608       }
 609 }
 610
 611 void
 612 print_cert_info_compact (gnutls_session_t session)
 613 {
 614
 615     if (gnutls_certificate_client_get_request_status (session) != 0)
 616         printf ("- Server has requested a certificate.\n");
 617
 618     switch (gnutls_certificate_type_get (session))
 619       {
 620       case GNUTLS_CRT_X509:
 621           print_x509_info_compact (session);
 622           break;
 623 #ifdef ENABLE_OPENPGP
 624       case GNUTLS_CRT_OPENPGP:
 625           print_openpgp_info_compact (session);
 626           break;
 627 #endif
 628       default:
 629           printf ("Unknown type\n");
 630           break;
 631       }
 632 }
 633
 634 void
 635 print_list (const char *priorities, int verbose)
 636 {
 637     size_t i;
 638     int ret;
 639     unsigned int idx;
 640     const char *name;
 641     const char *err;
 642     unsigned char id[2];
 643     gnutls_kx_algorithm_t kx;
 644     gnutls_cipher_algorithm_t cipher;
 645     gnutls_mac_algorithm_t mac;
 646     gnutls_protocol_t version;
 647     gnutls_priority_t pcache;
 648     const unsigned int *list;
 649
 650     if (priorities != NULL)
 651       {
 652           printf ("Cipher suites for %s\n", priorities);
 653
 654           ret = gnutls_priority_init (&pcache, priorities, &err);
 655           if (ret < 0)
 656             {
 657                 fprintf (stderr, "Syntax error at: %s\n", err);
 658                 exit (1);
 659             }
 660
 661           for (i = 0;; i++)
 662             {
 663                 ret =
 664                     gnutls_priority_get_cipher_suite_index (pcache, i,
 665                                                             &idx);
 666                 if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
 667                     break;
 668                 if (ret == GNUTLS_E_UNKNOWN_CIPHER_SUITE)
 669                     continue;
 670
 671                 name =
 672                     gnutls_cipher_suite_info (idx, id, NULL, NULL, NULL,
 673                                               &version);
 674
 675                 if (name != NULL)
 676                     printf ("%-50s\t0x%02x, 0x%02x\t%s\n",
 677                             name, (unsigned char) id[0],
 678                             (unsigned char) id[1],
 679                             gnutls_protocol_get_name (version));
 680             }
 681
 682           printf("\n");
 683           {
 684               ret = gnutls_priority_certificate_type_list (pcache, &list);
 685
 686               printf ("Certificate types: ");
 687               if (ret == 0) printf("none\n");
 688               for (i = 0; i < (unsigned)ret; i++)
 689                 {
 690                     printf ("CTYPE-%s",
 691                             gnutls_certificate_type_get_name (list[i]));
 692                     if (i+1!=(unsigned)ret)
 693                         printf (", ");
 694                     else
 695                         printf ("\n");
 696                 }
 697           }
 698
 699           {
 700               ret = gnutls_priority_protocol_list (pcache, &list);
 701
 702               printf ("Protocols: ");
 703               if (ret == 0) printf("none\n");
 704               for (i = 0; i < (unsigned)ret; i++)
 705                 {
 706                     printf ("VERS-%s", gnutls_protocol_get_name (list[i]));
 707                     if (i+1!=(unsigned)ret)
 708                         printf (", ");
 709                     else
 710                         printf ("\n");
 711                 }
 712           }
 713
 714           {
 715               ret = gnutls_priority_compression_list (pcache, &list);
 716
 717               printf ("Compression: ");
 718               if (ret == 0) printf("none\n");
 719               for (i = 0; i < (unsigned)ret; i++)
 720                 {
 721                     printf ("COMP-%s",
 722                             gnutls_compression_get_name (list[i]));
 723                     if (i+1!=(unsigned)ret)
 724                         printf (", ");
 725                     else
 726                         printf ("\n");
 727                 }
 728           }
 729
 730           {
 731               ret = gnutls_priority_ecc_curve_list (pcache, &list);
 732
 733               printf ("Elliptic curves: ");
 734               if (ret == 0) printf("none\n");
 735               for (i = 0; i < (unsigned)ret; i++)
 736                 {
 737                     printf ("CURVE-%s",
 738                             gnutls_ecc_curve_get_name (list[i]));
 739                     if (i+1!=(unsigned)ret)
 740                         printf (", ");
 741                     else
 742                         printf ("\n");
 743                 }
 744           }
 745
 746           {
 747               ret = gnutls_priority_sign_list (pcache, &list);
 748
 749               printf ("PK-signatures: ");
 750               if (ret == 0) printf("none\n");
 751               for (i = 0; i < (unsigned)ret; i++)
 752                 {
 753                     printf ("SIGN-%s",
 754                             gnutls_sign_algorithm_get_name (list[i]));
 755                     if (i+1!=(unsigned)ret)
 756                         printf (", ");
 757                     else
 758                         printf ("\n");
 759                 }
 760           }
 761
 762           return;
 763       }
 764
 765     printf ("Cipher suites:\n");
 766     for (i = 0; (name = gnutls_cipher_suite_info
 767                  (i, id, &kx, &cipher, &mac, &version)); i++)
 768       {
 769           printf ("%-50s\t0x%02x, 0x%02x\t%s\n",
 770                   name,
 771                   (unsigned char) id[0], (unsigned char) id[1],
 772                   gnutls_protocol_get_name (version));
 773           if (verbose)
 774               printf ("\tKey exchange: %s\n\tCipher: %s\n\tMAC: %s\n\n",
 775                       gnutls_kx_get_name (kx),
 776                       gnutls_cipher_get_name (cipher),
 777                       gnutls_mac_get_name (mac));
 778       }
 779
 780     printf("\n");
 781     {
 782         const gnutls_certificate_type_t *p =
 783             gnutls_certificate_type_list ();
 784
 785         printf ("Certificate types: ");
 786         for (; *p; p++)
 787           {
 788               printf ("CTYPE-%s", gnutls_certificate_type_get_name (*p));
 789               if (*(p + 1))
 790                   printf (", ");
 791               else
 792                   printf ("\n");
 793           }
 794     }
 795
 796     {
 797         const gnutls_protocol_t *p = gnutls_protocol_list ();
 798
 799         printf ("Protocols: ");
 800         for (; *p; p++)
 801           {
 802               printf ("VERS-%s", gnutls_protocol_get_name (*p));
 803               if (*(p + 1))
 804                   printf (", ");
 805               else
 806                   printf ("\n");
 807           }
 808     }
 809
 810     {
 811         const gnutls_cipher_algorithm_t *p = gnutls_cipher_list ();
 812
 813         printf ("Ciphers: ");
 814         for (; *p; p++)
 815           {
 816               printf ("%s", gnutls_cipher_get_name (*p));
 817               if (*(p + 1))
 818                   printf (", ");
 819               else
 820                   printf ("\n");
 821           }
 822     }
 823
 824     {
 825         const gnutls_mac_algorithm_t *p = gnutls_mac_list ();
 826
 827         printf ("MACs: ");
 828         for (; *p; p++)
 829           {
 830               printf ("%s", gnutls_mac_get_name (*p));
 831               if (*(p + 1))
 832                   printf (", ");
 833               else
 834                   printf ("\n");
 835           }
 836     }
 837
 838     {
 839         const gnutls_kx_algorithm_t *p = gnutls_kx_list ();
 840
 841         printf ("Key exchange algorithms: ");
 842         for (; *p; p++)
 843           {
 844               printf ("%s", gnutls_kx_get_name (*p));
 845               if (*(p + 1))
 846                   printf (", ");
 847               else
 848                   printf ("\n");
 849           }
 850     }
 851
 852     {
 853         const gnutls_compression_method_t *p = gnutls_compression_list ();
 854
 855         printf ("Compression: ");
 856         for (; *p; p++)
 857           {
 858               printf ("COMP-%s", gnutls_compression_get_name (*p));
 859               if (*(p + 1))
 860                   printf (", ");
 861               else
 862                   printf ("\n");
 863           }
 864     }
 865
 866     {
 867         const gnutls_ecc_curve_t *p = gnutls_ecc_curve_list ();
 868
 869         printf ("Elliptic curves: ");
 870         for (; *p; p++)
 871           {
 872               printf ("CURVE-%s", gnutls_ecc_curve_get_name (*p));
 873               if (*(p + 1))
 874                   printf (", ");
 875               else
 876                   printf ("\n");
 877           }
 878     }
 879
 880     {
 881         const gnutls_pk_algorithm_t *p = gnutls_pk_list ();
 882
 883         printf ("Public Key Systems: ");
 884         for (; *p; p++)
 885           {
 886               printf ("%s", gnutls_pk_algorithm_get_name (*p));
 887               if (*(p + 1))
 888                   printf (", ");
 889               else
 890                   printf ("\n");
 891           }
 892     }
 893
 894     {
 895         const gnutls_sign_algorithm_t *p = gnutls_sign_list ();
 896
 897         printf ("PK-signatures: ");
 898         for (; *p; p++)
 899           {
 900               printf ("SIGN-%s", gnutls_sign_algorithm_get_name (*p));
 901               if (*(p + 1))
 902                   printf (", ");
 903               else
 904                   printf ("\n");
 905           }
 906     }
 907 }
 908
 909 int check_command(gnutls_session_t session, const char* str)
 910 {
 911   size_t len = strnlen(str, 128);
 912   int ret;
 913
 914   fprintf (stderr, "*** Processing %zu bytes command: %s\n", len, str);
 915   if (len > 2 && str[0] == str[1] && str[0] == '*')
 916   {
 917       if (strncmp(str, "**REHANDSHAKE**", sizeof ("**REHANDSHAKE**") - 1) == 0)
 918       {
 919           fprintf (stderr, "*** Sending rehandshake request\n");
 920           gnutls_rehandshake (session);
 921           return 1;
 922       } else if (strncmp(str, "**HEARTBEAT**", sizeof ("**HEARTBEAT**") - 1) == 0) {
 923           ret = gnutls_heartbeat_ping (session, 300, 5, GNUTLS_HEARTBEAT_WAIT);
 924           if (ret < 0)
 925             {
 926               if (ret == GNUTLS_E_INVALID_REQUEST)
 927                 {
 928                   fprintf(stderr, "No heartbeat in this session\n");
 929                 }
 930               else
 931                 {
 932                   fprintf(stderr, "ping: %s\n", gnutls_strerror(ret));
 933                   exit(1);
 934                 }
 935             }
 936           return 2;
 937       }
 938   }
 939   return 0;
 940 }
 941
 942 #define MIN(x,y) ((x)<(y))?(x):(y)
 943 #define MAX_CACHE_TRIES 5
 944 int
 945 pin_callback (void *user, int attempt, const char *token_url,
 946               const char *token_label, unsigned int flags, char *pin,
 947               size_t pin_max)
 948 {
 949   const char *password;
 950   const char * desc;
 951   int len, cache = MAX_CACHE_TRIES;
 952 /* allow caching of PIN */
 953   static char *cached_url = NULL;
 954   static char cached_pin[32] = "";
 955
 956   if (flags & GNUTLS_PIN_SO)
 957     desc = "security officer";
 958   else
 959     desc = "user";
 960
 961   if (flags & GNUTLS_PIN_FINAL_TRY)
 962     {
 963       cache = 0;
 964       printf ("*** This is the final try before locking!\n");
 965     }
 966   if (flags & GNUTLS_PIN_COUNT_LOW)
 967     {
 968       cache = 0;
 969       printf ("*** Only few tries left before locking!\n");
 970     }
 971
 972   if (flags & GNUTLS_PIN_WRONG)
 973     {
 974       cache = 0;
 975       printf ("*** Wrong PIN has been provided!\n");
 976     }
 977
 978   if (cache > 0 && cached_url != NULL)
 979     {
 980       if (strcmp (cached_url, token_url) == 0)
 981         {
 982           if (strlen(pin) >= sizeof(cached_pin))
 983             {
 984               fprintf (stderr, "Too long PIN given\n");
 985               exit (1);
 986             }
 987
 988           fprintf(stderr, "Re-using cached PIN for token '%s'\n", token_label);
 989           strcpy (pin, cached_pin);
 990           cache--;
 991           return 0;
 992         }
 993     }
 994
 995   printf ("Token '%s' with URL '%s' ", token_label, token_url);
 996   printf ("requires %s PIN\n", desc);
 997
 998   password = getpass ("Enter PIN: ");
 999   if (password == NULL || password[0] == 0)
1000     {
1001       fprintf (stderr, "No password given\n");
1002       exit (1);
1003     }
1004
1005   len = MIN (pin_max, strlen (password));
1006   memcpy (pin, password, len);
1007   pin[len] = 0;
1008
1009   /* cache */
1010   strcpy (cached_pin, pin);
1011   free (cached_url);
1012   cached_url = strdup (token_url);
1013   cache = MAX_CACHE_TRIES;
1014
1015   return 0;
1016 }
1017
1018 #ifdef ENABLE_PKCS11
1019
1020 static int
1021 token_callback (void *user, const char *label, const unsigned retry)
1022 {
1023   char buf[32];
1024
1025   if (retry > 0)
1026     {
1027       fprintf (stderr, "Could not find token %s\n", label);
1028       return -1;
1029     }
1030   printf ("Please insert token '%s' in slot and press enter\n", label);
1031   fgets (buf, sizeof (buf), stdin);
1032
1033   return 0;
1034 }
1035
1036 void
1037 pkcs11_common (void)
1038 {
1039
1040   gnutls_pkcs11_set_pin_function (pin_callback, NULL);
1041   gnutls_pkcs11_set_token_function (token_callback, NULL);
1042
1043 }
1044
1045 #endif