src/common/ssl_certificate.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2011 Colin Leroy <colin@colino.net>
   4  * and the Claws Mail team
   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
  21 #ifdef HAVE_CONFIG_H
  22 #  include "config.h"
  23 #endif
  24
  25 #ifdef USE_GNUTLS
  26 #include <gnutls/gnutls.h>
  27 #include <gnutls/x509.h>
  28 #include <gnutls/pkcs12.h>
  29 #include <sys/stat.h>
  30 #include <unistd.h>
  31 #include <string.h>
  32 #include <sys/types.h>
  33 #include <stdio.h>
  34 #include <glib.h>
  35 #include <glib/gi18n.h>
  36 #ifdef G_OS_WIN32
  37 #  include <winsock2.h>
  38 #else
  39 #  include <sys/socket.h>
  40 #  include <netinet/in.h>
  41 #  include <netdb.h>
  42 #endif /* G_OS_WIN32 */
  43 #include "ssl_certificate.h"
  44 #include "utils.h"
  45 #include "log.h"
  46 #include "socket.h"
  47 #include "hooks.h"
  48 #include "defs.h"
  49
  50 static GHashTable *warned_expired = NULL;
  51
  52 gboolean prefs_common_unsafe_ssl_certs(void);
  53
  54 static gchar *get_certificate_path(const gchar *host, const gchar *port, const gchar *fp)
  55 {
  56         if (fp != NULL && prefs_common_unsafe_ssl_certs())
  57                 return g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
  58                           "certs", G_DIR_SEPARATOR_S,
  59                           host, ".", port, ".", fp, ".cert", NULL);
  60         else
  61                 return g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
  62                           "certs", G_DIR_SEPARATOR_S,
  63                           host, ".", port, ".cert", NULL);
  64 }
  65
  66 char * readable_fingerprint(unsigned char *src, int len)
  67 {
  68         int i=0;
  69         char * ret;
  70
  71         if (src == NULL)
  72                 return NULL;
  73         ret = g_strdup("");
  74         while (i < len) {
  75                 char *tmp2;
  76                 if(i>0)
  77                         tmp2 = g_strdup_printf("%s:%02X", ret, src[i]);
  78                 else
  79                         tmp2 = g_strdup_printf("%02X", src[i]);
  80                 g_free(ret);
  81                 ret = g_strdup(tmp2);
  82                 g_free(tmp2);
  83                 i++;
  84         }
  85         return ret;
  86 }
  87
  88 #if USE_GNUTLS
  89 static gnutls_x509_crt x509_crt_copy(gnutls_x509_crt src)
  90 {
  91     int ret;
  92     size_t size;
  93     gnutls_datum tmp;
  94     gnutls_x509_crt dest;
  95
  96     if (gnutls_x509_crt_init(&dest) != 0) {
  97         g_warning("couldn't gnutls_x509_crt_init\n");
  98         return NULL;
  99     }
 100
 101     if (gnutls_x509_crt_export(src, GNUTLS_X509_FMT_DER, NULL, &size)
 102         != GNUTLS_E_SHORT_MEMORY_BUFFER) {
 103         g_warning("couldn't gnutls_x509_crt_export to get size\n");
 104         gnutls_x509_crt_deinit(dest);
 105         return NULL;
 106     }
 107
 108     tmp.data = malloc(size);
 109     memset(tmp.data, 0, size);
 110     ret = gnutls_x509_crt_export(src, GNUTLS_X509_FMT_DER, tmp.data, &size);
 111     if (ret == 0) {
 112         tmp.size = size;
 113         ret = gnutls_x509_crt_import(dest, &tmp, GNUTLS_X509_FMT_DER);
 114         if (ret) {
 115                 g_warning("couldn't gnutls_x509_crt_import for real (%d %s)\n", ret, gnutls_strerror(ret));
 116                 gnutls_x509_crt_deinit(dest);
 117                 dest = NULL;
 118         }
 119     } else {
 120         g_warning("couldn't gnutls_x509_crt_export for real (%d %s)\n", ret, gnutls_strerror(ret));
 121         gnutls_x509_crt_deinit(dest);
 122         dest = NULL;
 123     }
 124
 125     free(tmp.data);
 126     return dest;
 127 }
 128 #endif
 129
 130 static SSLCertificate *ssl_certificate_new(gnutls_x509_crt x509_cert, const gchar *host, gushort port)
 131 {
 132         SSLCertificate *cert = g_new0(SSLCertificate, 1);
 133         size_t n;
 134         unsigned char md[128];
 135
 136         if (host == NULL || x509_cert == NULL) {
 137                 ssl_certificate_destroy(cert);
 138                 return NULL;
 139         }
 140         cert->x509_cert = x509_crt_copy(x509_cert);
 141         cert->status = (guint)-1;
 142         cert->host = g_strdup(host);
 143         cert->port = port;
 144
 145         /* fingerprint */
 146         n = 128;
 147         gnutls_x509_crt_get_fingerprint(cert->x509_cert, GNUTLS_DIG_MD5, md, &n);
 148         cert->fingerprint = readable_fingerprint(md, (int)n);
 149         return cert;
 150 }
 151
 152 #ifdef USE_GNUTLS
 153 static void gnutls_i2d_X509_fp(FILE *fp, gnutls_x509_crt x509_cert)
 154 {
 155         char output[10*1024];
 156         size_t cert_size = 10*1024;
 157         int r;
 158
 159         if ((r = gnutls_x509_crt_export(x509_cert, GNUTLS_X509_FMT_DER, output, &cert_size)) < 0) {
 160                 g_warning("couldn't export cert %s (%zd)\n", gnutls_strerror(r), cert_size);
 161                 return;
 162         }
 163         debug_print("writing %zd bytes\n",cert_size);
 164         if (fwrite(&output, 1, cert_size, fp) < cert_size) {
 165                 g_warning("failed to write cert\n");
 166         }
 167 }
 168
 169 size_t gnutls_i2d_X509(gnutls_x509_crt x509_cert, unsigned char **output)
 170 {
 171         size_t cert_size = 10*1024;
 172         int r;
 173
 174         if (output == NULL)
 175                 return 0;
 176
 177         *output = malloc(cert_size);
 178
 179         if ((r = gnutls_x509_crt_export(x509_cert, GNUTLS_X509_FMT_DER, *output, &cert_size)) < 0) {
 180                 g_warning("couldn't export cert %s (%zd)\n", gnutls_strerror(r), cert_size);
 181                 free(*output);
 182                 *output = NULL;
 183                 return 0;
 184         }
 185         return cert_size;
 186 }
 187
 188 size_t gnutls_i2d_PrivateKey(gnutls_x509_privkey pkey, unsigned char **output)
 189 {
 190         size_t key_size = 10*1024;
 191         int r;
 192
 193         if (output == NULL)
 194                 return 0;
 195
 196         *output = malloc(key_size);
 197
 198         if ((r = gnutls_x509_privkey_export(pkey, GNUTLS_X509_FMT_DER, *output, &key_size)) < 0) {
 199                 g_warning("couldn't export key %s (%zd)\n", gnutls_strerror(r), key_size);
 200                 free(*output);
 201                 *output = NULL;
 202                 return 0;
 203         }
 204         return key_size;
 205 }
 206
 207 static gnutls_x509_crt gnutls_d2i_X509_fp(FILE *fp, int format)
 208 {
 209         gnutls_x509_crt cert = NULL;
 210         gnutls_datum tmp;
 211         struct stat s;
 212         int r;
 213         if (fstat(fileno(fp), &s) < 0) {
 214                 perror("fstat");
 215                 return NULL;
 216         }
 217         tmp.data = malloc(s.st_size);
 218         memset(tmp.data, 0, s.st_size);
 219         tmp.size = s.st_size;
 220         if (fread (tmp.data, 1, s.st_size, fp) < s.st_size) {
 221                 perror("fread");
 222                 free(tmp.data);
 223                 return NULL;
 224         }
 225
 226         gnutls_x509_crt_init(&cert);
 227         if ((r = gnutls_x509_crt_import(cert, &tmp, (format == 0)?GNUTLS_X509_FMT_DER:GNUTLS_X509_FMT_PEM)) < 0) {
 228                 debug_print("cert import failed: %s\n", gnutls_strerror(r));
 229                 gnutls_x509_crt_deinit(cert);
 230                 cert = NULL;
 231         }
 232         free(tmp.data);
 233         debug_print("got cert! %p\n", cert);
 234         return cert;
 235 }
 236
 237 static gnutls_x509_privkey gnutls_d2i_key_fp(FILE *fp, int format)
 238 {
 239         gnutls_x509_privkey key = NULL;
 240         gnutls_datum tmp;
 241         struct stat s;
 242         int r;
 243         if (fstat(fileno(fp), &s) < 0) {
 244                 perror("fstat");
 245                 return NULL;
 246         }
 247         tmp.data = malloc(s.st_size);
 248         memset(tmp.data, 0, s.st_size);
 249         tmp.size = s.st_size;
 250         if (fread (tmp.data, 1, s.st_size, fp) < s.st_size) {
 251                 perror("fread");
 252                 free(tmp.data);
 253                 return NULL;
 254         }
 255
 256         gnutls_x509_privkey_init(&key);
 257         if ((r = gnutls_x509_privkey_import(key, &tmp, (format == 0)?GNUTLS_X509_FMT_DER:GNUTLS_X509_FMT_PEM)) < 0) {
 258                 debug_print("key import failed: %s\n", gnutls_strerror(r));
 259                 gnutls_x509_privkey_deinit(key);
 260                 key = NULL;
 261         }
 262         free(tmp.data);
 263         debug_print("got key! %p\n", key);
 264         return key;
 265 }
 266
 267 static gnutls_pkcs12_t gnutls_d2i_PKCS12_fp(FILE *fp, int format)
 268 {
 269         gnutls_pkcs12_t p12 = NULL;
 270         gnutls_datum tmp;
 271         struct stat s;
 272         int r;
 273         if (fstat(fileno(fp), &s) < 0) {
 274                 perror("fstat");
 275                 return NULL;
 276         }
 277         tmp.data = malloc(s.st_size);
 278         memset(tmp.data, 0, s.st_size);
 279         tmp.size = s.st_size;
 280         if (fread (tmp.data, 1, s.st_size, fp) < s.st_size) {
 281                 perror("fread");
 282                 free(tmp.data);
 283                 return NULL;
 284         }
 285
 286         gnutls_pkcs12_init(&p12);
 287
 288         if ((r = gnutls_pkcs12_import(p12, &tmp, (format == 0)?GNUTLS_X509_FMT_DER:GNUTLS_X509_FMT_PEM,0)) < 0) {
 289                 g_warning("p12 import failed: %s\n", gnutls_strerror(r));
 290                 gnutls_pkcs12_deinit(p12);
 291                 p12 = NULL;
 292         }
 293         free(tmp.data);
 294         debug_print("got p12! %p\n", p12);
 295         return p12;
 296 }
 297
 298 #endif
 299
 300 static void ssl_certificate_save (SSLCertificate *cert)
 301 {
 302         gchar *file, *port;
 303         FILE *fp;
 304
 305         file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
 306                           "certs", G_DIR_SEPARATOR_S, NULL);
 307
 308         if (!is_dir_exist(file))
 309                 make_dir_hier(file);
 310         g_free(file);
 311
 312         port = g_strdup_printf("%d", cert->port);
 313         file = get_certificate_path(cert->host, port, cert->fingerprint);
 314
 315         g_free(port);
 316         fp = g_fopen(file, "wb");
 317         if (fp == NULL) {
 318                 g_free(file);
 319                 debug_print("Can't save certificate !\n");
 320                 return;
 321         }
 322 #ifdef USE_GNUTLS
 323         gnutls_i2d_X509_fp(fp, cert->x509_cert);
 324 #else
 325         i2d_X509_fp(fp, cert->x509_cert);
 326 #endif
 327         g_free(file);
 328         fclose(fp);
 329
 330 }
 331
 332 void ssl_certificate_destroy(SSLCertificate *cert)
 333 {
 334         if (cert == NULL)
 335                 return;
 336
 337         if (cert->x509_cert)
 338                 gnutls_x509_crt_deinit(cert->x509_cert);
 339         g_free(cert->host);
 340         g_free(cert->fingerprint);
 341         g_free(cert);
 342         cert = NULL;
 343 }
 344
 345 void ssl_certificate_delete_from_disk(SSLCertificate *cert)
 346 {
 347         gchar *buf;
 348         gchar *file;
 349         buf = g_strdup_printf("%d", cert->port);
 350         file = get_certificate_path(cert->host, buf, cert->fingerprint);
 351         claws_unlink (file);
 352         g_free(file);
 353         g_free(buf);
 354 }
 355
 356 SSLCertificate *ssl_certificate_find (const gchar *host, gushort port, const gchar *fingerprint)
 357 {
 358         gchar *file = NULL;
 359         gchar *buf;
 360         SSLCertificate *cert = NULL;
 361         gnutls_x509_crt tmp_x509;
 362         FILE *fp = NULL;
 363         gboolean must_rename = FALSE;
 364
 365         buf = g_strdup_printf("%d", port);
 366
 367         if (fingerprint != NULL) {
 368                 file = get_certificate_path(host, buf, fingerprint);
 369                 fp = g_fopen(file, "rb");
 370         }
 371         if (fp == NULL) {
 372                 /* see if we have the old one */
 373                 debug_print("didn't get %s\n", file);
 374                 g_free(file);
 375                 file = get_certificate_path(host, buf, NULL);
 376                 fp = g_fopen(file, "rb");
 377
 378                 if (fp) {
 379                         debug_print("got %s\n", file);
 380                         must_rename = (fingerprint != NULL);
 381                 }
 382         } else {
 383                 debug_print("got %s first try\n", file);
 384         }
 385         if (fp == NULL) {
 386                 g_free(file);
 387                 g_free(buf);
 388                 return NULL;
 389         }
 390
 391         if ((tmp_x509 = gnutls_d2i_X509_fp(fp, 0)) != NULL) {
 392                 cert = ssl_certificate_new(tmp_x509, host, port);
 393                 debug_print("got cert %p\n", cert);
 394                 gnutls_x509_crt_deinit(tmp_x509);
 395         }
 396         fclose(fp);
 397         g_free(file);
 398
 399         if (must_rename) {
 400                 gchar *old = get_certificate_path(host, buf, NULL);
 401                 gchar *new = get_certificate_path(host, buf, fingerprint);
 402                 if (strcmp(old, new))
 403                         move_file(old, new, TRUE);
 404                 g_free(old);
 405                 g_free(new);
 406         }
 407         g_free(buf);
 408
 409         return cert;
 410 }
 411
 412 static gboolean ssl_certificate_compare (SSLCertificate *cert_a, SSLCertificate *cert_b)
 413 {
 414         char *output_a;
 415         char *output_b;
 416         size_t cert_size_a = 0, cert_size_b = 0;
 417         int r;
 418
 419         if (cert_a == NULL || cert_b == NULL)
 420                 return FALSE;
 421
 422         if ((r = gnutls_x509_crt_export(cert_a->x509_cert, GNUTLS_X509_FMT_DER, NULL, &cert_size_a))
 423             != GNUTLS_E_SHORT_MEMORY_BUFFER) {
 424                 g_warning("couldn't gnutls_x509_crt_export to get size a %s\n", gnutls_strerror(r));
 425                 return FALSE;
 426         }
 427
 428         if ((r = gnutls_x509_crt_export(cert_b->x509_cert, GNUTLS_X509_FMT_DER, NULL, &cert_size_b))
 429             != GNUTLS_E_SHORT_MEMORY_BUFFER) {
 430                 g_warning("couldn't gnutls_x509_crt_export to get size b %s\n", gnutls_strerror(r));
 431                 return FALSE;
 432         }
 433
 434         output_a = g_malloc(cert_size_a);
 435         output_b = g_malloc(cert_size_b);
 436         if ((r = gnutls_x509_crt_export(cert_a->x509_cert, GNUTLS_X509_FMT_DER, output_a, &cert_size_a)) < 0) {
 437                 g_warning("couldn't gnutls_x509_crt_export a %s\n", gnutls_strerror(r));
 438                 g_free(output_a);
 439                 g_free(output_b);
 440                 return FALSE;
 441         }
 442         if ((r = gnutls_x509_crt_export(cert_b->x509_cert, GNUTLS_X509_FMT_DER, output_b, &cert_size_b)) < 0) {
 443                 g_warning("couldn't gnutls_x509_crt_export b %s\n", gnutls_strerror(r));
 444                 g_free(output_a);
 445                 g_free(output_b);
 446                 return FALSE;
 447         }
 448         if (cert_size_a != cert_size_b) {
 449                 g_warning("size differ %zd %zd\n", cert_size_a, cert_size_b);
 450                 g_free(output_a);
 451                 g_free(output_b);
 452                 return FALSE;
 453         }
 454         if (memcmp(output_a, output_b, cert_size_a)) {
 455                 g_warning("contents differ\n");
 456                 g_free(output_a);
 457                 g_free(output_b);
 458                 return FALSE;
 459         }
 460         g_free(output_a);
 461         g_free(output_b);
 462
 463         return TRUE;
 464 }
 465
 466 static guint check_cert(gnutls_x509_crt cert)
 467 {
 468         gnutls_x509_crt *ca_list;
 469         unsigned int max = 512;
 470         unsigned int flags = 0;
 471         gnutls_datum tmp;
 472         struct stat s;
 473         int r, i;
 474         unsigned int status;
 475         FILE *fp;
 476
 477         if (claws_ssl_get_cert_file())
 478                 fp = g_fopen(claws_ssl_get_cert_file(), "r");
 479         else
 480                 return (guint)-1;
 481
 482         if (fstat(fileno(fp), &s) < 0) {
 483                 perror("fstat");
 484                 fclose(fp);
 485                 return (guint)-1;
 486         }
 487
 488         ca_list=(gnutls_x509_crt_t*)malloc(max*sizeof(gnutls_x509_crt_t));
 489         tmp.data = malloc(s.st_size);
 490         memset(tmp.data, 0, s.st_size);
 491         tmp.size = s.st_size;
 492         if (fread (tmp.data, 1, s.st_size, fp) < s.st_size) {
 493                 perror("fread");
 494                 free(tmp.data);
 495                 free(ca_list);
 496                 fclose(fp);
 497                 return (guint)-1;
 498         }
 499
 500         if ((r = gnutls_x509_crt_list_import(ca_list, &max,
 501                         &tmp, GNUTLS_X509_FMT_PEM, flags)) < 0) {
 502                 debug_print("cert import failed: %s\n", gnutls_strerror(r));
 503                 free(tmp.data);
 504                 free(ca_list);
 505                 fclose(fp);
 506                 return (guint)-1;
 507         }
 508         free(tmp.data);
 509         debug_print("got %d certs in ca_list! %p\n", max, &ca_list);
 510         r = gnutls_x509_crt_verify(cert, ca_list, max, flags, &status);
 511         fclose(fp);
 512
 513         for (i = 0; i < max; i++)
 514                 gnutls_x509_crt_deinit(ca_list[i]);
 515         free(ca_list);
 516
 517         if (r < 0)
 518                 return (guint)-1;
 519         else
 520                 return status;
 521
 522 }
 523
 524 char *ssl_certificate_check_signer (gnutls_x509_crt cert, guint status)
 525 {
 526         if (status == (guint)-1) {
 527                 status = check_cert(cert);
 528                 if (status == -1)
 529                         return g_strdup(_("Uncheckable"));
 530         }
 531         if (status & GNUTLS_CERT_INVALID) {
 532                 if (gnutls_x509_crt_check_issuer(cert, cert))
 533                         return g_strdup(_("Self-signed certificate"));
 534         }
 535         if (status & GNUTLS_CERT_REVOKED)
 536                 return g_strdup(_("Revoked certificate"));
 537         if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
 538                 return g_strdup(_("No certificate issuer found"));
 539         if (status & GNUTLS_CERT_SIGNER_NOT_CA)
 540                 return g_strdup(_("Certificate issuer is not a CA"));
 541
 542
 543         return NULL;
 544 }
 545
 546 gboolean ssl_certificate_check (gnutls_x509_crt x509_cert, guint status, const gchar *host, gushort port)
 547 {
 548         SSLCertificate *current_cert = NULL;
 549         SSLCertificate *known_cert;
 550         SSLCertHookData cert_hook_data;
 551         gchar *fingerprint;
 552         size_t n;
 553         unsigned char md[128];
 554
 555         current_cert = ssl_certificate_new(x509_cert, host, port);
 556
 557         if (current_cert == NULL) {
 558                 debug_print("Buggy certificate !\n");
 559                 return FALSE;
 560         }
 561
 562         current_cert->status = status;
 563         /* fingerprint */
 564         n = 128;
 565         gnutls_x509_crt_get_fingerprint(x509_cert, GNUTLS_DIG_MD5, md, &n);
 566         fingerprint = readable_fingerprint(md, n);
 567
 568         known_cert = ssl_certificate_find(host, port, fingerprint);
 569
 570         g_free(fingerprint);
 571
 572         if (known_cert == NULL) {
 573                 cert_hook_data.cert = current_cert;
 574                 cert_hook_data.old_cert = NULL;
 575                 cert_hook_data.expired = FALSE;
 576                 cert_hook_data.accept = FALSE;
 577
 578                 hooks_invoke(SSLCERT_ASK_HOOKLIST, &cert_hook_data);
 579
 580                 if (!cert_hook_data.accept) {
 581                         ssl_certificate_destroy(current_cert);
 582                         return FALSE;
 583                 } else {
 584                         ssl_certificate_save(current_cert);
 585                         ssl_certificate_destroy(current_cert);
 586                         return TRUE;
 587                 }
 588         } else if (!ssl_certificate_compare (current_cert, known_cert)) {
 589                 cert_hook_data.cert = current_cert;
 590                 cert_hook_data.old_cert = known_cert;
 591                 cert_hook_data.expired = FALSE;
 592                 cert_hook_data.accept = FALSE;
 593
 594                 hooks_invoke(SSLCERT_ASK_HOOKLIST, &cert_hook_data);
 595
 596                 if (!cert_hook_data.accept) {
 597                         ssl_certificate_destroy(current_cert);
 598                         ssl_certificate_destroy(known_cert);
 599                         return FALSE;
 600                 } else {
 601                         ssl_certificate_save(current_cert);
 602                         ssl_certificate_destroy(current_cert);
 603                         ssl_certificate_destroy(known_cert);
 604                         return TRUE;
 605                 }
 606         } else if (gnutls_x509_crt_get_expiration_time(current_cert->x509_cert) < time(NULL)) {
 607                 gchar *tmp = g_strdup_printf("%s:%d", current_cert->host, current_cert->port);
 608
 609                 if (warned_expired == NULL)
 610                         warned_expired = g_hash_table_new(g_str_hash, g_str_equal);
 611
 612                 if (g_hash_table_lookup(warned_expired, tmp)) {
 613                         g_free(tmp);
 614                         ssl_certificate_destroy(current_cert);
 615                         ssl_certificate_destroy(known_cert);
 616                         return TRUE;
 617                 }
 618
 619                 cert_hook_data.cert = current_cert;
 620                 cert_hook_data.old_cert = NULL;
 621                 cert_hook_data.expired = TRUE;
 622                 cert_hook_data.accept = FALSE;
 623
 624                 hooks_invoke(SSLCERT_ASK_HOOKLIST, &cert_hook_data);
 625
 626                 if (!cert_hook_data.accept) {
 627                         g_free(tmp);
 628                         ssl_certificate_destroy(current_cert);
 629                         ssl_certificate_destroy(known_cert);
 630                         return FALSE;
 631                 } else {
 632                         g_hash_table_insert(warned_expired, tmp, GINT_TO_POINTER(1));
 633                         ssl_certificate_destroy(current_cert);
 634                         ssl_certificate_destroy(known_cert);
 635                         return TRUE;
 636                 }
 637         }
 638
 639         ssl_certificate_destroy(current_cert);
 640         ssl_certificate_destroy(known_cert);
 641         return TRUE;
 642 }
 643
 644 gnutls_x509_crt ssl_certificate_get_x509_from_pem_file(const gchar *file)
 645 {
 646         gnutls_x509_crt x509 = NULL;
 647         if (!file)
 648                 return NULL;
 649
 650         if (is_file_exist(file)) {
 651                 FILE *fp = g_fopen(file, "r");
 652                 if (fp) {
 653                         x509 = gnutls_d2i_X509_fp(fp, 1);
 654                         fclose(fp);
 655                         return x509;
 656                 }
 657         } else {
 658                 log_error(LOG_PROTOCOL, _("Cannot open certificate file %s\n"), file);
 659         }
 660         return NULL;
 661 }
 662
 663 gnutls_x509_privkey ssl_certificate_get_pkey_from_pem_file(const gchar *file)
 664 {
 665         gnutls_x509_privkey key = NULL;
 666         if (!file)
 667                 return NULL;
 668
 669         if (is_file_exist(file)) {
 670                 FILE *fp = g_fopen(file, "r");
 671                 if (fp) {
 672                         key = gnutls_d2i_key_fp(fp, 1);
 673                         fclose(fp);
 674                         return key;
 675                 }
 676         } else {
 677                 log_error(LOG_PROTOCOL, _("Cannot open key file %s\n"), file);
 678         }
 679         return NULL;
 680 }
 681
 682 /* From GnuTLS lib/gnutls_x509.c */
 683 static int
 684 parse_pkcs12 (gnutls_pkcs12_t p12,
 685               const char *password,
 686               gnutls_x509_privkey * key,
 687               gnutls_x509_crt_t * cert)
 688 {
 689   gnutls_pkcs12_bag_t bag = NULL;
 690   int index = 0;
 691   int ret;
 692
 693   for (;;)
 694     {
 695       int elements_in_bag;
 696       int i;
 697
 698       ret = gnutls_pkcs12_bag_init (&bag);
 699       if (ret < 0)
 700         {
 701           bag = NULL;
 702           goto done;
 703         }
 704
 705       ret = gnutls_pkcs12_get_bag (p12, index, bag);
 706       if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
 707         break;
 708       if (ret < 0)
 709         {
 710           goto done;
 711         }
 712
 713       ret = gnutls_pkcs12_bag_get_type (bag, 0);
 714       if (ret < 0)
 715         {
 716           goto done;
 717         }
 718
 719       if (ret == GNUTLS_BAG_ENCRYPTED)
 720         {
 721           ret = gnutls_pkcs12_bag_decrypt (bag, password);
 722           if (ret < 0)
 723             {
 724               goto done;
 725             }
 726         }
 727
 728       elements_in_bag = gnutls_pkcs12_bag_get_count (bag);
 729       if (elements_in_bag < 0)
 730         {
 731           goto done;
 732         }
 733
 734       for (i = 0; i < elements_in_bag; i++)
 735         {
 736           int type;
 737           gnutls_datum data;
 738
 739           type = gnutls_pkcs12_bag_get_type (bag, i);
 740           if (type < 0)
 741             {
 742               goto done;
 743             }
 744
 745           ret = gnutls_pkcs12_bag_get_data (bag, i, &data);
 746           if (ret < 0)
 747             {
 748               goto done;
 749             }
 750
 751           switch (type)
 752             {
 753             case GNUTLS_BAG_PKCS8_ENCRYPTED_KEY:
 754             case GNUTLS_BAG_PKCS8_KEY:
 755               ret = gnutls_x509_privkey_init (key);
 756               if (ret < 0)
 757                 {
 758                   goto done;
 759                 }
 760
 761               ret = gnutls_x509_privkey_import_pkcs8
 762                 (*key, &data, GNUTLS_X509_FMT_DER, password,
 763                  type == GNUTLS_BAG_PKCS8_KEY ? GNUTLS_PKCS_PLAIN : 0);
 764               if (ret < 0)
 765                 {
 766                   goto done;
 767                 }
 768               break;
 769
 770             case GNUTLS_BAG_CERTIFICATE:
 771               ret = gnutls_x509_crt_init (cert);
 772               if (ret < 0)
 773                 {
 774                   goto done;
 775                 }
 776
 777               ret =
 778                 gnutls_x509_crt_import (*cert, &data, GNUTLS_X509_FMT_DER);
 779               if (ret < 0)
 780                 {
 781                   goto done;
 782                 }
 783               break;
 784
 785             case GNUTLS_BAG_ENCRYPTED:
 786               /* XXX Bother to recurse one level down?  Unlikely to
 787                  use the same password anyway. */
 788             case GNUTLS_BAG_EMPTY:
 789             default:
 790               break;
 791             }
 792         }
 793
 794       index++;
 795       gnutls_pkcs12_bag_deinit (bag);
 796     }
 797
 798   ret = 0;
 799
 800 done:
 801   if (bag)
 802     gnutls_pkcs12_bag_deinit (bag);
 803
 804   return ret;
 805 }
 806 void ssl_certificate_get_x509_and_pkey_from_p12_file(const gchar *file, const gchar *password,
 807                         gnutls_x509_crt *x509, gnutls_x509_privkey *pkey)
 808 {
 809         gnutls_pkcs12_t p12 = NULL;
 810
 811         int r;
 812
 813         *x509 = NULL;
 814         *pkey = NULL;
 815         if (!file)
 816                 return;
 817
 818         if (is_file_exist(file)) {
 819                 FILE *fp = g_fopen(file, "r");
 820                 if (fp) {
 821                         p12 = gnutls_d2i_PKCS12_fp(fp, 0);
 822                         fclose(fp);
 823                 }
 824         } else {
 825                 log_error(LOG_PROTOCOL, _("Cannot open certificate file %s\n"), file);
 826         }
 827         if (p12 != NULL) {
 828                 if ((r = parse_pkcs12(p12, password, pkey, x509)) == 0) {
 829                         debug_print("got p12\n");
 830                 } else {
 831                         log_error(LOG_PROTOCOL, "%s\n", gnutls_strerror(r));
 832                 }
 833                 gnutls_pkcs12_deinit(p12);
 834         }
 835 }
 836 #endif /* USE_GNUTLS */