src/common/ssl_certificate.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 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 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
  26 #if USE_OPENSSL
  27 #include <openssl/ssl.h>
  28 #else
  29 #include <gnutls/gnutls.h>
  30 #include <gnutls/x509.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <stdio.h>
  34 #include <unistd.h>
  35 #include <string.h>
  36 #endif
  37 #include <glib.h>
  38 #include <glib/gi18n.h>
  39
  40 #ifdef G_OS_WIN32
  41 #include "winsock2.h"
  42 #endif
  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 #if USE_OPENSSL
  67 static SSLCertificate *ssl_certificate_new_lookup(X509 *x509_cert, gchar *host, gushort port, gboolean lookup);
  68 #else
  69 static SSLCertificate *ssl_certificate_new_lookup(gnutls_x509_crt x509_cert, gchar *host, gushort port, gboolean lookup);
  70 #endif
  71 #if USE_OPENSSL
  72 /* from Courier */
  73 time_t asn1toTime(ASN1_TIME *asn1Time)
  74 {
  75         struct tm tm;
  76         int offset;
  77
  78         if (asn1Time == NULL || asn1Time->length < 13)
  79                 return 0;
  80
  81         memset(&tm, 0, sizeof(tm));
  82
  83 #define N2(n)   ((asn1Time->data[n]-'0')*10 + asn1Time->data[(n)+1]-'0')
  84
  85 #define CPY(f,n) (tm.f=N2(n))
  86
  87         CPY(tm_year,0);
  88
  89         if(tm.tm_year < 50)
  90                 tm.tm_year += 100; /* Sux */
  91
  92         CPY(tm_mon, 2);
  93         --tm.tm_mon;
  94         CPY(tm_mday, 4);
  95         CPY(tm_hour, 6);
  96         CPY(tm_min, 8);
  97         CPY(tm_sec, 10);
  98
  99         offset=0;
 100
 101         if (asn1Time->data[12] != 'Z')
 102         {
 103                 if (asn1Time->length < 17)
 104                         return 0;
 105
 106                 offset=N2(13)*3600+N2(15)*60;
 107
 108                 if (asn1Time->data[12] == '-')
 109                         offset= -offset;
 110         }
 111
 112 #undef N2
 113 #undef CPY
 114
 115         return mktime(&tm)-offset;
 116 }
 117 #endif
 118
 119 static char * get_fqdn(char *host)
 120 {
 121 #ifdef INET6
 122         gint gai_err;
 123         struct addrinfo hints, *res;
 124 #else
 125         struct hostent *hp;
 126 #endif
 127
 128         if (host == NULL || strlen(host) == 0)
 129                 return g_strdup("");
 130 #ifdef INET6
 131         memset(&hints, 0, sizeof(hints));
 132         hints.ai_flags = AI_CANONNAME;
 133         hints.ai_family = AF_UNSPEC;
 134         hints.ai_socktype = SOCK_STREAM;
 135         hints.ai_protocol = IPPROTO_TCP;
 136
 137         gai_err = getaddrinfo(host, NULL, &hints, &res);
 138         if (gai_err != 0) {
 139                 g_warning("getaddrinfo for %s failed: %s\n",
 140                           host, gai_strerror(gai_err));
 141                 return g_strdup(host);
 142         }
 143         if (res != NULL) {
 144                 if (res->ai_canonname && strlen(res->ai_canonname)) {
 145                         gchar *fqdn = g_strdup(res->ai_canonname);
 146                         freeaddrinfo(res);
 147                         return fqdn;
 148                 } else {
 149                         freeaddrinfo(res);
 150                         return g_strdup(host);
 151                 }
 152         } else {
 153                 return g_strdup(host);
 154         }
 155 #else
 156         hp = my_gethostbyname(host);
 157         if (hp == NULL)
 158                 return g_strdup(host); /*caller should free*/
 159         else
 160                 return g_strdup(hp->h_name);
 161 #endif
 162 }
 163
 164 char * readable_fingerprint(unsigned char *src, int len)
 165 {
 166         int i=0;
 167         char * ret;
 168
 169         if (src == NULL)
 170                 return NULL;
 171         ret = g_strdup("");
 172         while (i < len) {
 173                 char *tmp2;
 174                 if(i>0)
 175                         tmp2 = g_strdup_printf("%s:%02X", ret, src[i]);
 176                 else
 177                         tmp2 = g_strdup_printf("%02X", src[i]);
 178                 g_free(ret);
 179                 ret = g_strdup(tmp2);
 180                 g_free(tmp2);
 181                 i++;
 182         }
 183         return ret;
 184 }
 185
 186 #if USE_GNUTLS
 187 static gnutls_x509_crt x509_crt_copy(gnutls_x509_crt src)
 188 {
 189     int ret;
 190     size_t size;
 191     gnutls_datum tmp;
 192     gnutls_x509_crt dest;
 193
 194     if (gnutls_x509_crt_init(&dest) != 0) {
 195         g_warning("couldn't gnutls_x509_crt_init\n");
 196         return NULL;
 197     }
 198
 199     if (gnutls_x509_crt_export(src, GNUTLS_X509_FMT_DER, NULL, &size)
 200         != GNUTLS_E_SHORT_MEMORY_BUFFER) {
 201         g_warning("couldn't gnutls_x509_crt_export to get size\n");
 202         gnutls_x509_crt_deinit(dest);
 203         return NULL;
 204     }
 205
 206     tmp.data = malloc(size);
 207     memset(tmp.data, 0, size);
 208     ret = gnutls_x509_crt_export(src, GNUTLS_X509_FMT_DER, tmp.data, &size);
 209     if (ret == 0) {
 210         tmp.size = size;
 211         ret = gnutls_x509_crt_import(dest, &tmp, GNUTLS_X509_FMT_DER);
 212         if (ret) {
 213                 g_warning("couldn't gnutls_x509_crt_import for real (%d %s)\n", ret, gnutls_strerror(ret));
 214                 gnutls_x509_crt_deinit(dest);
 215                 dest = NULL;
 216         }
 217     } else {
 218         g_warning("couldn't gnutls_x509_crt_export for real (%d %s)\n", ret, gnutls_strerror(ret));
 219         gnutls_x509_crt_deinit(dest);
 220         dest = NULL;
 221     }
 222
 223     free(tmp.data);
 224     return dest;
 225 }
 226 #endif
 227
 228 #if USE_OPENSSL
 229 static SSLCertificate *ssl_certificate_new_lookup(X509 *x509_cert, gchar *host, gushort port, gboolean lookup)
 230 #else
 231 static SSLCertificate *ssl_certificate_new_lookup(gnutls_x509_crt x509_cert, gchar *host, gushort port, gboolean lookup)
 232 #endif
 233 {
 234         SSLCertificate *cert = g_new0(SSLCertificate, 1);
 235         unsigned int n;
 236         unsigned char md[128];
 237
 238         if (host == NULL || x509_cert == NULL) {
 239                 ssl_certificate_destroy(cert);
 240                 return NULL;
 241         }
 242 #if USE_OPENSSL
 243         cert->x509_cert = X509_dup(x509_cert);
 244 #else
 245         cert->x509_cert = x509_crt_copy(x509_cert);
 246         cert->status = (guint)-1;
 247 #endif
 248         if (lookup)
 249                 cert->host = get_fqdn(host);
 250         else
 251                 cert->host = g_strdup(host);
 252         cert->port = port;
 253
 254         /* fingerprint */
 255 #if USE_OPENSSL
 256         X509_digest(cert->x509_cert, EVP_md5(), md, &n);
 257         cert->fingerprint = readable_fingerprint(md, (int)n);
 258 #else
 259         gnutls_x509_crt_get_fingerprint(cert->x509_cert, GNUTLS_DIG_MD5, md, &n);
 260         cert->fingerprint = readable_fingerprint(md, (int)n);
 261 #endif
 262         return cert;
 263 }
 264
 265 #ifdef USE_GNUTLS
 266 static void i2d_X509_fp(FILE *fp, gnutls_x509_crt x509_cert)
 267 {
 268         char output[10*1024];
 269         size_t cert_size = 10*1024;
 270         int r;
 271
 272         if ((r = gnutls_x509_crt_export(x509_cert, GNUTLS_X509_FMT_DER, output, &cert_size)) < 0) {
 273                 g_warning("couldn't export cert %s (%d)\n", gnutls_strerror(r), cert_size);
 274                 return;
 275         }
 276         debug_print("writing %zd bytes\n",cert_size);
 277         if (fwrite(&output, 1, cert_size, fp) < cert_size) {
 278                 g_warning("failed to write cert\n");
 279         }
 280 }
 281 static gnutls_x509_crt d2i_X509_fp(FILE *fp, int unused)
 282 {
 283         gnutls_x509_crt cert = NULL;
 284         gnutls_datum tmp;
 285         struct stat s;
 286         int r;
 287         if (fstat(fileno(fp), &s) < 0) {
 288                 perror("fstat");
 289                 return NULL;
 290         }
 291         tmp.data = malloc(s.st_size);
 292         memset(tmp.data, 0, s.st_size);
 293         tmp.size = s.st_size;
 294         if (fread (tmp.data, 1, s.st_size, fp) < s.st_size) {
 295                 perror("fread");
 296                 return NULL;
 297         }
 298
 299         gnutls_x509_crt_init(&cert);
 300         if ((r = gnutls_x509_crt_import(cert, &tmp, GNUTLS_X509_FMT_DER)) < 0) {
 301                 g_warning("import failed: %s\n", gnutls_strerror(r));
 302                 gnutls_x509_crt_deinit(cert);
 303                 cert = NULL;
 304         }
 305         debug_print("got cert! %p\n", cert);
 306         return cert;
 307 }
 308 #endif
 309
 310 static void ssl_certificate_save (SSLCertificate *cert)
 311 {
 312         gchar *file, *port;
 313         FILE *fp;
 314
 315         file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
 316                           "certs", G_DIR_SEPARATOR_S, NULL);
 317
 318         if (!is_dir_exist(file))
 319                 make_dir_hier(file);
 320         g_free(file);
 321
 322         port = g_strdup_printf("%d", cert->port);
 323         file = get_certificate_path(cert->host, port, cert->fingerprint);
 324
 325         g_free(port);
 326         fp = g_fopen(file, "wb");
 327         if (fp == NULL) {
 328                 g_free(file);
 329                 debug_print("Can't save certificate !\n");
 330                 return;
 331         }
 332         i2d_X509_fp(fp, cert->x509_cert);
 333         g_free(file);
 334         fclose(fp);
 335
 336 }
 337
 338 void ssl_certificate_destroy(SSLCertificate *cert)
 339 {
 340         if (cert == NULL)
 341                 return;
 342
 343         if (cert->x509_cert)
 344 #if USE_OPENSSL
 345                 X509_free(cert->x509_cert);
 346 #else
 347                 gnutls_x509_crt_deinit(cert->x509_cert);
 348 #endif
 349         g_free(cert->host);
 350         g_free(cert->fingerprint);
 351         g_free(cert);
 352         cert = NULL;
 353 }
 354
 355 void ssl_certificate_delete_from_disk(SSLCertificate *cert)
 356 {
 357         gchar *buf;
 358         gchar *file;
 359         buf = g_strdup_printf("%d", cert->port);
 360         file = get_certificate_path(cert->host, buf, cert->fingerprint);
 361         g_unlink (file);
 362         g_free(file);
 363         g_free(buf);
 364 }
 365
 366 SSLCertificate *ssl_certificate_find (gchar *host, gushort port, const gchar *fingerprint)
 367 {
 368         return ssl_certificate_find_lookup (host, port, fingerprint, TRUE);
 369 }
 370
 371 SSLCertificate *ssl_certificate_find_lookup (gchar *host, gushort port, const gchar *fingerprint, gboolean lookup)
 372 {
 373         gchar *file = NULL;
 374         gchar *buf;
 375         gchar *fqdn_host;
 376         SSLCertificate *cert = NULL;
 377 #if USE_OPENSSL
 378         X509 *tmp_x509;
 379 #else
 380         gnutls_x509_crt tmp_x509;
 381 #endif
 382         FILE *fp = NULL;
 383         gboolean must_rename = FALSE;
 384
 385         if (lookup)
 386                 fqdn_host = get_fqdn(host);
 387         else
 388                 fqdn_host = g_strdup(host);
 389
 390         buf = g_strdup_printf("%d", port);
 391
 392         if (fingerprint != NULL) {
 393                 file = get_certificate_path(fqdn_host, buf, fingerprint);
 394                 fp = g_fopen(file, "rb");
 395         }
 396         if (fp == NULL) {
 397                 /* see if we have the old one */
 398                 debug_print("didn't get %s\n", file);
 399                 g_free(file);
 400                 file = get_certificate_path(fqdn_host, buf, NULL);
 401                 fp = g_fopen(file, "rb");
 402
 403                 if (fp) {
 404                         debug_print("got %s\n", file);
 405                         must_rename = (fingerprint != NULL);
 406                 }
 407         } else {
 408                 debug_print("got %s first try\n", file);
 409         }
 410         if (fp == NULL) {
 411                 g_free(file);
 412                 g_free(fqdn_host);
 413                 g_free(buf);
 414                 return NULL;
 415         }
 416
 417         if ((tmp_x509 = d2i_X509_fp(fp, 0)) != NULL) {
 418                 cert = ssl_certificate_new_lookup(tmp_x509, fqdn_host, port, lookup);
 419                 debug_print("got cert %p\n", cert);
 420 #if USE_OPENSSL
 421                 X509_free(tmp_x509);
 422 #else
 423                 gnutls_x509_crt_deinit(tmp_x509);
 424 #endif
 425         }
 426         fclose(fp);
 427         g_free(file);
 428
 429         if (must_rename) {
 430                 gchar *old = get_certificate_path(fqdn_host, buf, NULL);
 431                 gchar *new = get_certificate_path(fqdn_host, buf, fingerprint);
 432                 if (strcmp(old, new))
 433                         move_file(old, new, TRUE);
 434                 g_free(old);
 435                 g_free(new);
 436         }
 437         g_free(buf);
 438         g_free(fqdn_host);
 439
 440         return cert;
 441 }
 442
 443 static gboolean ssl_certificate_compare (SSLCertificate *cert_a, SSLCertificate *cert_b)
 444 {
 445 #ifdef USE_OPENSSL
 446         if (cert_a == NULL || cert_b == NULL)
 447                 return FALSE;
 448         else if (!X509_cmp(cert_a->x509_cert, cert_b->x509_cert))
 449                 return TRUE;
 450         else
 451                 return FALSE;
 452 #else
 453         char *output_a;
 454         char *output_b;
 455         size_t cert_size_a = 0, cert_size_b = 0;
 456         int r;
 457
 458         if (cert_a == NULL || cert_b == NULL)
 459                 return FALSE;
 460
 461         if ((r = gnutls_x509_crt_export(cert_a->x509_cert, GNUTLS_X509_FMT_DER, NULL, &cert_size_a))
 462             != GNUTLS_E_SHORT_MEMORY_BUFFER) {
 463                 g_warning("couldn't gnutls_x509_crt_export to get size a %s\n", gnutls_strerror(r));
 464                 return FALSE;
 465         }
 466
 467         if ((r = gnutls_x509_crt_export(cert_b->x509_cert, GNUTLS_X509_FMT_DER, NULL, &cert_size_b))
 468             != GNUTLS_E_SHORT_MEMORY_BUFFER) {
 469                 g_warning("couldn't gnutls_x509_crt_export to get size b %s\n", gnutls_strerror(r));
 470                 return FALSE;
 471         }
 472
 473         output_a = malloc(cert_size_a);
 474         output_b = malloc(cert_size_b);
 475         if ((r = gnutls_x509_crt_export(cert_a->x509_cert, GNUTLS_X509_FMT_DER, output_a, &cert_size_a)) < 0) {
 476                 g_warning("couldn't gnutls_x509_crt_export a %s\n", gnutls_strerror(r));
 477                 return FALSE;
 478         }
 479         if ((r = gnutls_x509_crt_export(cert_b->x509_cert, GNUTLS_X509_FMT_DER, output_b, &cert_size_b)) < 0) {
 480                 g_warning("couldn't gnutls_x509_crt_export b %s\n", gnutls_strerror(r));
 481                 return FALSE;
 482         }
 483         if (cert_size_a != cert_size_b) {
 484                 g_warning("size differ %d %d\n", cert_size_a, cert_size_b);
 485                 return FALSE;
 486         }
 487         if (memcmp(output_a, output_b, cert_size_a)) {
 488                 g_warning("contents differ\n");
 489                 return FALSE;
 490         }
 491
 492         return TRUE;
 493 #endif
 494 }
 495
 496 #if USE_OPENSSL
 497 char *ssl_certificate_check_signer (X509 *cert)
 498 {
 499         X509_STORE_CTX store_ctx;
 500         X509_STORE *store;
 501         char *err_msg = NULL;
 502
 503         store = X509_STORE_new();
 504         if (store == NULL) {
 505                 g_print("Can't create X509_STORE\n");
 506                 return NULL;
 507         }
 508         if (!X509_STORE_set_default_paths(store)) {
 509                 X509_STORE_free (store);
 510                 return g_strdup(_("Couldn't load X509 default paths"));
 511         }
 512
 513         X509_STORE_CTX_init (&store_ctx, store, cert, NULL);
 514
 515         if(!X509_verify_cert (&store_ctx)) {
 516                 err_msg = g_strdup(X509_verify_cert_error_string(
 517                                         X509_STORE_CTX_get_error(&store_ctx)));
 518                 debug_print("Can't check signer: %s\n", err_msg);
 519                 X509_STORE_CTX_cleanup (&store_ctx);
 520                 X509_STORE_free (store);
 521                 return err_msg;
 522
 523         }
 524         X509_STORE_CTX_cleanup (&store_ctx);
 525         X509_STORE_free (store);
 526         return NULL;
 527 }
 528 #else
 529 char *ssl_certificate_check_signer (gnutls_x509_crt cert, guint status)
 530 {
 531         if (status == (guint)-1)
 532                 return g_strdup(_("Uncheckable"));
 533
 534         if (status & GNUTLS_CERT_INVALID) {
 535                 if (gnutls_x509_crt_check_issuer(cert, cert))
 536                         return g_strdup(_("Self-signed certificate"));
 537         }
 538         if (status & GNUTLS_CERT_REVOKED)
 539                 return g_strdup(_("Revoked certificate"));
 540         if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
 541                 return g_strdup(_("No certificate issuer found"));
 542         if (status & GNUTLS_CERT_SIGNER_NOT_CA)
 543                 return g_strdup(_("Certificate issuer is not a CA"));
 544
 545
 546         return NULL;
 547 }
 548 #endif
 549
 550 #if USE_OPENSSL
 551 gboolean ssl_certificate_check (X509 *x509_cert, gchar *fqdn, gchar *host, gushort port)
 552 #else
 553 gboolean ssl_certificate_check (gnutls_x509_crt x509_cert, guint status, gchar *fqdn, gchar *host, gushort port)
 554 #endif
 555 {
 556         SSLCertificate *current_cert = NULL;
 557         SSLCertificate *known_cert;
 558         SSLCertHookData cert_hook_data;
 559         gchar *fqdn_host = NULL;
 560         gchar *fingerprint;
 561         unsigned int n;
 562         unsigned char md[128];
 563
 564         if (fqdn)
 565                 fqdn_host = g_strdup(fqdn);
 566         else if (host)
 567                 fqdn_host = get_fqdn(host);
 568         else {
 569                 g_warning("no host!\n");
 570                 return FALSE;
 571         }
 572
 573         current_cert = ssl_certificate_new_lookup(x509_cert, fqdn_host, port, FALSE);
 574
 575         if (current_cert == NULL) {
 576                 debug_print("Buggy certificate !\n");
 577                 g_free(fqdn_host);
 578                 return FALSE;
 579         }
 580
 581 #if USE_GNUTLS
 582         current_cert->status = status;
 583 #endif
 584         /* fingerprint */
 585 #if USE_OPENSSL
 586         X509_digest(x509_cert, EVP_md5(), md, &n);
 587         fingerprint = readable_fingerprint(md, (int)n);
 588 #else
 589         n = 128;
 590         gnutls_x509_crt_get_fingerprint(x509_cert, GNUTLS_DIG_MD5, md, &n);
 591         fingerprint = readable_fingerprint(md, (int)n);
 592 #endif
 593
 594         known_cert = ssl_certificate_find_lookup (fqdn_host, port, fingerprint, FALSE);
 595
 596         g_free(fingerprint);
 597         g_free(fqdn_host);
 598
 599         if (known_cert == NULL) {
 600                 cert_hook_data.cert = current_cert;
 601                 cert_hook_data.old_cert = NULL;
 602                 cert_hook_data.expired = FALSE;
 603                 cert_hook_data.accept = FALSE;
 604
 605                 hooks_invoke(SSLCERT_ASK_HOOKLIST, &cert_hook_data);
 606
 607                 if (!cert_hook_data.accept) {
 608                         ssl_certificate_destroy(current_cert);
 609                         return FALSE;
 610                 } else {
 611                         ssl_certificate_save(current_cert);
 612                         ssl_certificate_destroy(current_cert);
 613                         return TRUE;
 614                 }
 615         } else if (!ssl_certificate_compare (current_cert, known_cert)) {
 616                 cert_hook_data.cert = current_cert;
 617                 cert_hook_data.old_cert = known_cert;
 618                 cert_hook_data.expired = FALSE;
 619                 cert_hook_data.accept = FALSE;
 620
 621                 hooks_invoke(SSLCERT_ASK_HOOKLIST, &cert_hook_data);
 622
 623                 if (!cert_hook_data.accept) {
 624                         ssl_certificate_destroy(current_cert);
 625                         ssl_certificate_destroy(known_cert);
 626                         return FALSE;
 627                 } else {
 628                         ssl_certificate_save(current_cert);
 629                         ssl_certificate_destroy(current_cert);
 630                         ssl_certificate_destroy(known_cert);
 631                         return TRUE;
 632                 }
 633 #if USE_OPENSSL
 634         } else if (asn1toTime(X509_get_notAfter(current_cert->x509_cert)) < time(NULL)) {
 635 #else
 636         } else if (gnutls_x509_crt_get_expiration_time(current_cert->x509_cert) < time(NULL)) {
 637 #endif
 638                 gchar *tmp = g_strdup_printf("%s:%d", current_cert->host, current_cert->port);
 639
 640                 if (warned_expired == NULL)
 641                         warned_expired = g_hash_table_new(g_str_hash, g_str_equal);
 642
 643                 if (g_hash_table_lookup(warned_expired, tmp)) {
 644                         g_free(tmp);
 645                         ssl_certificate_destroy(current_cert);
 646                         ssl_certificate_destroy(known_cert);
 647                         return TRUE;
 648                 }
 649
 650                 cert_hook_data.cert = current_cert;
 651                 cert_hook_data.old_cert = NULL;
 652                 cert_hook_data.expired = TRUE;
 653                 cert_hook_data.accept = FALSE;
 654
 655                 hooks_invoke(SSLCERT_ASK_HOOKLIST, &cert_hook_data);
 656
 657                 if (!cert_hook_data.accept) {
 658                         g_free(tmp);
 659                         ssl_certificate_destroy(current_cert);
 660                         ssl_certificate_destroy(known_cert);
 661                         return FALSE;
 662                 } else {
 663                         g_hash_table_insert(warned_expired, tmp, GINT_TO_POINTER(1));
 664                         ssl_certificate_destroy(current_cert);
 665                         ssl_certificate_destroy(known_cert);
 666                         return TRUE;
 667                 }
 668         }
 669
 670         ssl_certificate_destroy(current_cert);
 671         ssl_certificate_destroy(known_cert);
 672         return TRUE;
 673 }
 674
 675 #endif /* USE_OPENSSL */