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\n", 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     gnutls_srtp_profile_t srtp_profile;
 460     int rc;
 461
 462     /* print session ID */
 463     gnutls_session_get_id (session, session_id, &session_id_size);
 464     printf ("- Session ID: %s\n",
 465             raw_to_string (session_id, session_id_size));
 466
 467     /* print the key exchange's algorithm name
 468      */
 469     kx = gnutls_kx_get (session);
 470
 471     cred = gnutls_auth_get_type (session);
 472     switch (cred)
 473       {
 474 #ifdef ENABLE_ANON
 475       case GNUTLS_CRD_ANON:
 476           if (kx == GNUTLS_KX_ANON_ECDH)
 477               print_ecdh_info (session, "Anonymous ");
 478           else
 479               print_dh_info (session, "Anonymous ", verbose);
 480           break;
 481 #endif
 482 #ifdef ENABLE_SRP
 483       case GNUTLS_CRD_SRP:
 484           /* This should be only called in server
 485            * side.
 486            */
 487           if (gnutls_srp_server_get_username (session) != NULL)
 488               printf ("- SRP authentication. Connected as '%s'\n",
 489                       gnutls_srp_server_get_username (session));
 490           break;
 491 #endif
 492 #ifdef ENABLE_PSK
 493       case GNUTLS_CRD_PSK:
 494           /* This returns NULL in server side.
 495            */
 496           if (gnutls_psk_client_get_hint (session) != NULL)
 497               printf ("- PSK authentication. PSK hint '%s'\n",
 498                       gnutls_psk_client_get_hint (session));
 499           /* This returns NULL in client side.
 500            */
 501           if (gnutls_psk_server_get_username (session) != NULL)
 502               printf ("- PSK authentication. Connected as '%s'\n",
 503                       gnutls_psk_server_get_username (session));
 504           if (kx == GNUTLS_KX_DHE_PSK)
 505               print_dh_info (session, "Ephemeral ", verbose);
 506           if (kx == GNUTLS_KX_ECDHE_PSK)
 507               print_ecdh_info (session, "Ephemeral ");
 508           break;
 509 #endif
 510       case GNUTLS_CRD_IA:
 511           printf ("- TLS/IA authentication\n");
 512           break;
 513       case GNUTLS_CRD_CERTIFICATE:
 514           {
 515               char dns[256];
 516               size_t dns_size = sizeof (dns);
 517               unsigned int type;
 518
 519               /* This fails in client side */
 520               if (gnutls_server_name_get
 521                   (session, dns, &dns_size, &type, 0) == 0)
 522                 {
 523                     printf ("- Given server name[%d]: %s\n", type, dns);
 524                 }
 525           }
 526
 527           if (print_cert)
 528             print_cert_info (session, verbose, print_cert);
 529
 530           if (kx == GNUTLS_KX_DHE_RSA || kx == GNUTLS_KX_DHE_DSS)
 531               print_dh_info (session, "Ephemeral ", verbose);
 532           else if (kx == GNUTLS_KX_ECDHE_RSA
 533                    || kx == GNUTLS_KX_ECDHE_ECDSA)
 534               print_ecdh_info (session, "Ephemeral ");
 535       }
 536
 537     tmp =
 538         SU (gnutls_protocol_get_name
 539             (gnutls_protocol_get_version (session)));
 540     printf ("- Version: %s\n", tmp);
 541
 542     tmp = SU (gnutls_kx_get_name (kx));
 543     printf ("- Key Exchange: %s\n", tmp);
 544
 545     tmp = SU (gnutls_cipher_get_name (gnutls_cipher_get (session)));
 546     printf ("- Cipher: %s\n", tmp);
 547
 548     tmp = SU (gnutls_mac_get_name (gnutls_mac_get (session)));
 549     printf ("- MAC: %s\n", tmp);
 550
 551     tmp =
 552         SU (gnutls_compression_get_name
 553             (gnutls_compression_get (session)));
 554     printf ("- Compression: %s\n", tmp);
 555
 556     rc = gnutls_srtp_get_selected_profile (session, &srtp_profile);
 557     if (rc == 0)
 558       printf ("- SRTP profile: %s\n", gnutls_srtp_get_profile_name (srtp_profile));
 559
 560     if (verbose)
 561       {
 562           gnutls_datum_t cb;
 563
 564           rc = gnutls_session_channel_binding (session,
 565                                                GNUTLS_CB_TLS_UNIQUE, &cb);
 566           if (rc)
 567               fprintf (stderr, "Channel binding error: %s\n",
 568                        gnutls_strerror (rc));
 569           else
 570             {
 571                 size_t i;
 572
 573                 printf ("- Channel binding 'tls-unique': ");
 574                 for (i = 0; i < cb.size; i++)
 575                     printf ("%02x", cb.data[i]);
 576                 printf ("\n");
 577             }
 578       }
 579
 580     /* Warning: Do not print anything more here. The 'Compression:'
 581        output MUST be the last non-verbose output.  This is used by
 582        Emacs starttls.el code. */
 583
 584     fflush (stdout);
 585
 586     return 0;
 587 }
 588
 589 void
 590 print_cert_info (gnutls_session_t session, int verbose, int print_cert)
 591 {
 592 int flag;
 593
 594     if (verbose) flag = GNUTLS_CRT_PRINT_FULL;
 595     else flag = GNUTLS_CRT_PRINT_COMPACT;
 596
 597     if (gnutls_certificate_client_get_request_status (session) != 0)
 598         printf ("- Server has requested a certificate.\n");
 599
 600     switch (gnutls_certificate_type_get (session))
 601       {
 602       case GNUTLS_CRT_X509:
 603           print_x509_info (session, flag, print_cert);
 604           break;
 605 #ifdef ENABLE_OPENPGP
 606       case GNUTLS_CRT_OPENPGP:
 607           print_openpgp_info (session, flag, print_cert);
 608           break;
 609 #endif
 610       default:
 611           printf ("Unknown type\n");
 612           break;
 613       }
 614 }
 615
 616 void
 617 print_cert_info_compact (gnutls_session_t session)
 618 {
 619
 620     if (gnutls_certificate_client_get_request_status (session) != 0)
 621         printf ("- Server has requested a certificate.\n");
 622
 623     switch (gnutls_certificate_type_get (session))
 624       {
 625       case GNUTLS_CRT_X509:
 626           print_x509_info_compact (session);
 627           break;
 628 #ifdef ENABLE_OPENPGP
 629       case GNUTLS_CRT_OPENPGP:
 630           print_openpgp_info_compact (session);
 631           break;
 632 #endif
 633       default:
 634           printf ("Unknown type\n");
 635           break;
 636       }
 637 }
 638
 639 void
 640 print_list (const char *priorities, int verbose)
 641 {
 642     size_t i;
 643     int ret;
 644     unsigned int idx;
 645     const char *name;
 646     const char *err;
 647     unsigned char id[2];
 648     gnutls_kx_algorithm_t kx;
 649     gnutls_cipher_algorithm_t cipher;
 650     gnutls_mac_algorithm_t mac;
 651     gnutls_protocol_t version;
 652     gnutls_priority_t pcache;
 653     const unsigned int *list;
 654
 655     if (priorities != NULL)
 656       {
 657           printf ("Cipher suites for %s\n", priorities);
 658
 659           ret = gnutls_priority_init (&pcache, priorities, &err);
 660           if (ret < 0)
 661             {
 662                 fprintf (stderr, "Syntax error at: %s\n", err);
 663                 exit (1);
 664             }
 665
 666           for (i = 0;; i++)
 667             {
 668                 ret =
 669                     gnutls_priority_get_cipher_suite_index (pcache, i,
 670                                                             &idx);
 671                 if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
 672                     break;
 673                 if (ret == GNUTLS_E_UNKNOWN_CIPHER_SUITE)
 674                     continue;
 675
 676                 name =
 677                     gnutls_cipher_suite_info (idx, id, NULL, NULL, NULL,
 678                                               &version);
 679
 680                 if (name != NULL)
 681                     printf ("%-50s\t0x%02x, 0x%02x\t%s\n",
 682                             name, (unsigned char) id[0],
 683                             (unsigned char) id[1],
 684                             gnutls_protocol_get_name (version));
 685             }
 686
 687           printf("\n");
 688           {
 689               ret = gnutls_priority_certificate_type_list (pcache, &list);
 690
 691               printf ("Certificate types: ");
 692               if (ret == 0) printf("none\n");
 693               for (i = 0; i < (unsigned)ret; i++)
 694                 {
 695                     printf ("CTYPE-%s",
 696                             gnutls_certificate_type_get_name (list[i]));
 697                     if (i+1!=(unsigned)ret)
 698                         printf (", ");
 699                     else
 700                         printf ("\n");
 701                 }
 702           }
 703
 704           {
 705               ret = gnutls_priority_protocol_list (pcache, &list);
 706
 707               printf ("Protocols: ");
 708               if (ret == 0) printf("none\n");
 709               for (i = 0; i < (unsigned)ret; i++)
 710                 {
 711                     printf ("VERS-%s", gnutls_protocol_get_name (list[i]));
 712                     if (i+1!=(unsigned)ret)
 713                         printf (", ");
 714                     else
 715                         printf ("\n");
 716                 }
 717           }
 718
 719           {
 720               ret = gnutls_priority_compression_list (pcache, &list);
 721
 722               printf ("Compression: ");
 723               if (ret == 0) printf("none\n");
 724               for (i = 0; i < (unsigned)ret; i++)
 725                 {
 726                     printf ("COMP-%s",
 727                             gnutls_compression_get_name (list[i]));
 728                     if (i+1!=(unsigned)ret)
 729                         printf (", ");
 730                     else
 731                         printf ("\n");
 732                 }
 733           }
 734
 735           {
 736               ret = gnutls_priority_ecc_curve_list (pcache, &list);
 737
 738               printf ("Elliptic curves: ");
 739               if (ret == 0) printf("none\n");
 740               for (i = 0; i < (unsigned)ret; i++)
 741                 {
 742                     printf ("CURVE-%s",
 743                             gnutls_ecc_curve_get_name (list[i]));
 744                     if (i+1!=(unsigned)ret)
 745                         printf (", ");
 746                     else
 747                         printf ("\n");
 748                 }
 749           }
 750
 751           {
 752               ret = gnutls_priority_sign_list (pcache, &list);
 753
 754               printf ("PK-signatures: ");
 755               if (ret == 0) printf("none\n");
 756               for (i = 0; i < (unsigned)ret; i++)
 757                 {
 758                     printf ("SIGN-%s",
 759                             gnutls_sign_algorithm_get_name (list[i]));
 760                     if (i+1!=(unsigned)ret)
 761                         printf (", ");
 762                     else
 763                         printf ("\n");
 764                 }
 765           }
 766
 767           return;
 768       }
 769
 770     printf ("Cipher suites:\n");
 771     for (i = 0; (name = gnutls_cipher_suite_info
 772                  (i, id, &kx, &cipher, &mac, &version)); i++)
 773       {
 774           printf ("%-50s\t0x%02x, 0x%02x\t%s\n",
 775                   name,
 776                   (unsigned char) id[0], (unsigned char) id[1],
 777                   gnutls_protocol_get_name (version));
 778           if (verbose)
 779               printf ("\tKey exchange: %s\n\tCipher: %s\n\tMAC: %s\n\n",
 780                       gnutls_kx_get_name (kx),
 781                       gnutls_cipher_get_name (cipher),
 782                       gnutls_mac_get_name (mac));
 783       }
 784
 785     printf("\n");
 786     {
 787         const gnutls_certificate_type_t *p =
 788             gnutls_certificate_type_list ();
 789
 790         printf ("Certificate types: ");
 791         for (; *p; p++)
 792           {
 793               printf ("CTYPE-%s", gnutls_certificate_type_get_name (*p));
 794               if (*(p + 1))
 795                   printf (", ");
 796               else
 797                   printf ("\n");
 798           }
 799     }
 800
 801     {
 802         const gnutls_protocol_t *p = gnutls_protocol_list ();
 803
 804         printf ("Protocols: ");
 805         for (; *p; p++)
 806           {
 807               printf ("VERS-%s", gnutls_protocol_get_name (*p));
 808               if (*(p + 1))
 809                   printf (", ");
 810               else
 811                   printf ("\n");
 812           }
 813     }
 814
 815     {
 816         const gnutls_cipher_algorithm_t *p = gnutls_cipher_list ();
 817
 818         printf ("Ciphers: ");
 819         for (; *p; p++)
 820           {
 821               printf ("%s", gnutls_cipher_get_name (*p));
 822               if (*(p + 1))
 823                   printf (", ");
 824               else
 825                   printf ("\n");
 826           }
 827     }
 828
 829     {
 830         const gnutls_mac_algorithm_t *p = gnutls_mac_list ();
 831
 832         printf ("MACs: ");
 833         for (; *p; p++)
 834           {
 835               printf ("%s", gnutls_mac_get_name (*p));
 836               if (*(p + 1))
 837                   printf (", ");
 838               else
 839                   printf ("\n");
 840           }
 841     }
 842
 843     {
 844         const gnutls_kx_algorithm_t *p = gnutls_kx_list ();
 845
 846         printf ("Key exchange algorithms: ");
 847         for (; *p; p++)
 848           {
 849               printf ("%s", gnutls_kx_get_name (*p));
 850               if (*(p + 1))
 851                   printf (", ");
 852               else
 853                   printf ("\n");
 854           }
 855     }
 856
 857     {
 858         const gnutls_compression_method_t *p = gnutls_compression_list ();
 859
 860         printf ("Compression: ");
 861         for (; *p; p++)
 862           {
 863               printf ("COMP-%s", gnutls_compression_get_name (*p));
 864               if (*(p + 1))
 865                   printf (", ");
 866               else
 867                   printf ("\n");
 868           }
 869     }
 870
 871     {
 872         const gnutls_ecc_curve_t *p = gnutls_ecc_curve_list ();
 873
 874         printf ("Elliptic curves: ");
 875         for (; *p; p++)
 876           {
 877               printf ("CURVE-%s", gnutls_ecc_curve_get_name (*p));
 878               if (*(p + 1))
 879                   printf (", ");
 880               else
 881                   printf ("\n");
 882           }
 883     }
 884
 885     {
 886         const gnutls_pk_algorithm_t *p = gnutls_pk_list ();
 887
 888         printf ("Public Key Systems: ");
 889         for (; *p; p++)
 890           {
 891               printf ("%s", gnutls_pk_algorithm_get_name (*p));
 892               if (*(p + 1))
 893                   printf (", ");
 894               else
 895                   printf ("\n");
 896           }
 897     }
 898
 899     {
 900         const gnutls_sign_algorithm_t *p = gnutls_sign_list ();
 901
 902         printf ("PK-signatures: ");
 903         for (; *p; p++)
 904           {
 905               printf ("SIGN-%s", gnutls_sign_algorithm_get_name (*p));
 906               if (*(p + 1))
 907                   printf (", ");
 908               else
 909                   printf ("\n");
 910           }
 911     }
 912 }
 913
 914 int check_command(gnutls_session_t session, const char* str)
 915 {
 916   size_t len = strnlen(str, 128);
 917   int ret;
 918
 919   fprintf (stderr, "*** Processing %zu bytes command: %s\n", len, str);
 920   if (len > 2 && str[0] == str[1] && str[0] == '*')
 921   {
 922       if (strncmp(str, "**REHANDSHAKE**", sizeof ("**REHANDSHAKE**") - 1) == 0)
 923       {
 924           fprintf (stderr, "*** Sending rehandshake request\n");
 925           gnutls_rehandshake (session);
 926           return 1;
 927       } else if (strncmp(str, "**HEARTBEAT**", sizeof ("**HEARTBEAT**") - 1) == 0) {
 928           ret = gnutls_heartbeat_ping (session, 300, 5, GNUTLS_HEARTBEAT_WAIT);
 929           if (ret < 0)
 930             {
 931               if (ret == GNUTLS_E_INVALID_REQUEST)
 932                 {
 933                   fprintf(stderr, "No heartbeat in this session\n");
 934                 }
 935               else
 936                 {
 937                   fprintf(stderr, "ping: %s\n", gnutls_strerror(ret));
 938                   exit(1);
 939                 }
 940             }
 941           return 2;
 942       }
 943   }
 944   return 0;
 945 }
 946
 947 #define MIN(x,y) ((x)<(y))?(x):(y)
 948 #define MAX_CACHE_TRIES 5
 949 int
 950 pin_callback (void *user, int attempt, const char *token_url,
 951               const char *token_label, unsigned int flags, char *pin,
 952               size_t pin_max)
 953 {
 954   const char *password;
 955   const char * desc;
 956   int len, cache = MAX_CACHE_TRIES;
 957 /* allow caching of PIN */
 958   static char *cached_url = NULL;
 959   static char cached_pin[32] = "";
 960
 961   if (flags & GNUTLS_PIN_SO)
 962     desc = "security officer";
 963   else
 964     desc = "user";
 965
 966   if (flags & GNUTLS_PIN_FINAL_TRY)
 967     {
 968       cache = 0;
 969       printf ("*** This is the final try before locking!\n");
 970     }
 971   if (flags & GNUTLS_PIN_COUNT_LOW)
 972     {
 973       cache = 0;
 974       printf ("*** Only few tries left before locking!\n");
 975     }
 976
 977   if (flags & GNUTLS_PIN_WRONG)
 978     {
 979       cache = 0;
 980       printf ("*** Wrong PIN has been provided!\n");
 981     }
 982
 983   if (cache > 0 && cached_url != NULL)
 984     {
 985       if (strcmp (cached_url, token_url) == 0)
 986         {
 987           if (strlen(pin) >= sizeof(cached_pin))
 988             {
 989               fprintf (stderr, "Too long PIN given\n");
 990               exit (1);
 991             }
 992
 993           fprintf(stderr, "Re-using cached PIN for token '%s'\n", token_label);
 994           strcpy (pin, cached_pin);
 995           cache--;
 996           return 0;
 997         }
 998     }
 999
1000   printf ("Token '%s' with URL '%s' ", token_label, token_url);
1001   printf ("requires %s PIN\n", desc);
1002
1003   password = getpass ("Enter PIN: ");
1004   if (password == NULL || password[0] == 0)
1005     {
1006       fprintf (stderr, "No password given\n");
1007       exit (1);
1008     }
1009
1010   len = MIN (pin_max, strlen (password));
1011   memcpy (pin, password, len);
1012   pin[len] = 0;
1013
1014   /* cache */
1015   strcpy (cached_pin, pin);
1016   free (cached_url);
1017   cached_url = strdup (token_url);
1018   cache = MAX_CACHE_TRIES;
1019
1020   return 0;
1021 }
1022
1023 #ifdef ENABLE_PKCS11
1024
1025 static int
1026 token_callback (void *user, const char *label, const unsigned retry)
1027 {
1028   char buf[32];
1029
1030   if (retry > 0)
1031     {
1032       fprintf (stderr, "Could not find token %s\n", label);
1033       return -1;
1034     }
1035   printf ("Please insert token '%s' in slot and press enter\n", label);
1036   fgets (buf, sizeof (buf), stdin);
1037
1038   return 0;
1039 }
1040
1041 void
1042 pkcs11_common (void)
1043 {
1044
1045   gnutls_pkcs11_set_pin_function (pin_callback, NULL);
1046   gnutls_pkcs11_set_token_function (token_callback, NULL);
1047
1048 }
1049
1050 #endif