apps/s_cb.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /* callback functions used by s_client, s_server, and s_time */
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h> /* for memcpy() and strcmp() */
  14 #include "apps.h"
  15 #include <openssl/err.h>
  16 #include <openssl/rand.h>
  17 #include <openssl/x509.h>
  18 #include <openssl/ssl.h>
  19 #include <openssl/bn.h>
  20 #ifndef OPENSSL_NO_DH
  21 # include <openssl/dh.h>
  22 #endif
  23 #include "s_apps.h"
  24
  25 #define COOKIE_SECRET_LENGTH    16
  26
  27 VERIFY_CB_ARGS verify_args = { 0, 0, X509_V_OK, 0 };
  28
  29 #ifndef OPENSSL_NO_SOCK
  30 static unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
  31 static int cookie_initialized = 0;
  32 #endif
  33 static BIO *bio_keylog = NULL;
  34
  35 static const char *lookup(int val, const STRINT_PAIR* list, const char* def)
  36 {
  37     for ( ; list->name; ++list)
  38         if (list->retval == val)
  39             return list->name;
  40     return def;
  41 }
  42
  43 int verify_callback(int ok, X509_STORE_CTX *ctx)
  44 {
  45     X509 *err_cert;
  46     int err, depth;
  47
  48     err_cert = X509_STORE_CTX_get_current_cert(ctx);
  49     err = X509_STORE_CTX_get_error(ctx);
  50     depth = X509_STORE_CTX_get_error_depth(ctx);
  51
  52     if (!verify_args.quiet || !ok) {
  53         BIO_printf(bio_err, "depth=%d ", depth);
  54         if (err_cert != NULL) {
  55             X509_NAME_print_ex(bio_err,
  56                                X509_get_subject_name(err_cert),
  57                                0, get_nameopt());
  58             BIO_puts(bio_err, "\n");
  59         } else {
  60             BIO_puts(bio_err, "<no cert>\n");
  61         }
  62     }
  63     if (!ok) {
  64         BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
  65                    X509_verify_cert_error_string(err));
  66         if (verify_args.depth >= depth) {
  67             if (!verify_args.return_error)
  68                 ok = 1;
  69             verify_args.error = err;
  70         } else {
  71             ok = 0;
  72             verify_args.error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
  73         }
  74     }
  75     switch (err) {
  76     case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
  77         BIO_puts(bio_err, "issuer= ");
  78         X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
  79                            0, get_nameopt());
  80         BIO_puts(bio_err, "\n");
  81         break;
  82     case X509_V_ERR_CERT_NOT_YET_VALID:
  83     case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
  84         BIO_printf(bio_err, "notBefore=");
  85         ASN1_TIME_print(bio_err, X509_get0_notBefore(err_cert));
  86         BIO_printf(bio_err, "\n");
  87         break;
  88     case X509_V_ERR_CERT_HAS_EXPIRED:
  89     case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
  90         BIO_printf(bio_err, "notAfter=");
  91         ASN1_TIME_print(bio_err, X509_get0_notAfter(err_cert));
  92         BIO_printf(bio_err, "\n");
  93         break;
  94     case X509_V_ERR_NO_EXPLICIT_POLICY:
  95         if (!verify_args.quiet)
  96             policies_print(ctx);
  97         break;
  98     }
  99     if (err == X509_V_OK && ok == 2 && !verify_args.quiet)
 100         policies_print(ctx);
 101     if (ok && !verify_args.quiet)
 102         BIO_printf(bio_err, "verify return:%d\n", ok);
 103     return ok;
 104 }
 105
 106 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 107 {
 108     if (cert_file != NULL) {
 109         if (SSL_CTX_use_certificate_file(ctx, cert_file,
 110                                          SSL_FILETYPE_PEM) <= 0) {
 111             BIO_printf(bio_err, "unable to get certificate from '%s'\n",
 112                        cert_file);
 113             ERR_print_errors(bio_err);
 114             return 0;
 115         }
 116         if (key_file == NULL)
 117             key_file = cert_file;
 118         if (SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0) {
 119             BIO_printf(bio_err, "unable to get private key from '%s'\n",
 120                        key_file);
 121             ERR_print_errors(bio_err);
 122             return 0;
 123         }
 124
 125         /*
 126          * If we are using DSA, we can copy the parameters from the private
 127          * key
 128          */
 129
 130         /*
 131          * Now we know that a key and cert have been set against the SSL
 132          * context
 133          */
 134         if (!SSL_CTX_check_private_key(ctx)) {
 135             BIO_printf(bio_err,
 136                        "Private key does not match the certificate public key\n");
 137             return 0;
 138         }
 139     }
 140     return 1;
 141 }
 142
 143 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
 144                        STACK_OF(X509) *chain, int build_chain)
 145 {
 146     int chflags = chain ? SSL_BUILD_CHAIN_FLAG_CHECK : 0;
 147     if (cert == NULL)
 148         return 1;
 149     if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
 150         BIO_printf(bio_err, "error setting certificate\n");
 151         ERR_print_errors(bio_err);
 152         return 0;
 153     }
 154
 155     if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
 156         BIO_printf(bio_err, "error setting private key\n");
 157         ERR_print_errors(bio_err);
 158         return 0;
 159     }
 160
 161     /*
 162      * Now we know that a key and cert have been set against the SSL context
 163      */
 164     if (!SSL_CTX_check_private_key(ctx)) {
 165         BIO_printf(bio_err,
 166                    "Private key does not match the certificate public key\n");
 167         return 0;
 168     }
 169     if (chain && !SSL_CTX_set1_chain(ctx, chain)) {
 170         BIO_printf(bio_err, "error setting certificate chain\n");
 171         ERR_print_errors(bio_err);
 172         return 0;
 173     }
 174     if (build_chain && !SSL_CTX_build_cert_chain(ctx, chflags)) {
 175         BIO_printf(bio_err, "error building certificate chain\n");
 176         ERR_print_errors(bio_err);
 177         return 0;
 178     }
 179     return 1;
 180 }
 181
 182 static STRINT_PAIR cert_type_list[] = {
 183     {"RSA sign", TLS_CT_RSA_SIGN},
 184     {"DSA sign", TLS_CT_DSS_SIGN},
 185     {"RSA fixed DH", TLS_CT_RSA_FIXED_DH},
 186     {"DSS fixed DH", TLS_CT_DSS_FIXED_DH},
 187     {"ECDSA sign", TLS_CT_ECDSA_SIGN},
 188     {"RSA fixed ECDH", TLS_CT_RSA_FIXED_ECDH},
 189     {"ECDSA fixed ECDH", TLS_CT_ECDSA_FIXED_ECDH},
 190     {"GOST01 Sign", TLS_CT_GOST01_SIGN},
 191     {NULL}
 192 };
 193
 194 static void ssl_print_client_cert_types(BIO *bio, SSL *s)
 195 {
 196     const unsigned char *p;
 197     int i;
 198     int cert_type_num = SSL_get0_certificate_types(s, &p);
 199     if (!cert_type_num)
 200         return;
 201     BIO_puts(bio, "Client Certificate Types: ");
 202     for (i = 0; i < cert_type_num; i++) {
 203         unsigned char cert_type = p[i];
 204         const char *cname = lookup((int)cert_type, cert_type_list, NULL);
 205
 206         if (i)
 207             BIO_puts(bio, ", ");
 208         if (cname != NULL)
 209             BIO_puts(bio, cname);
 210         else
 211             BIO_printf(bio, "UNKNOWN (%d),", cert_type);
 212     }
 213     BIO_puts(bio, "\n");
 214 }
 215
 216 static const char *get_sigtype(int nid)
 217 {
 218     switch (nid) {
 219     case EVP_PKEY_RSA:
 220         return "RSA";
 221
 222     case EVP_PKEY_RSA_PSS:
 223         return "RSA-PSS";
 224
 225     case EVP_PKEY_DSA:
 226         return "DSA";
 227
 228      case EVP_PKEY_EC:
 229         return "ECDSA";
 230
 231      case NID_ED25519:
 232         return "Ed25519";
 233
 234      case NID_ED448:
 235         return "Ed448";
 236
 237      case NID_id_GostR3410_2001:
 238         return "gost2001";
 239
 240      case NID_id_GostR3410_2012_256:
 241         return "gost2012_256";
 242
 243      case NID_id_GostR3410_2012_512:
 244         return "gost2012_512";
 245
 246     default:
 247         return NULL;
 248     }
 249 }
 250
 251 static int do_print_sigalgs(BIO *out, SSL *s, int shared)
 252 {
 253     int i, nsig, client;
 254     client = SSL_is_server(s) ? 0 : 1;
 255     if (shared)
 256         nsig = SSL_get_shared_sigalgs(s, 0, NULL, NULL, NULL, NULL, NULL);
 257     else
 258         nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 259     if (nsig == 0)
 260         return 1;
 261
 262     if (shared)
 263         BIO_puts(out, "Shared ");
 264
 265     if (client)
 266         BIO_puts(out, "Requested ");
 267     BIO_puts(out, "Signature Algorithms: ");
 268     for (i = 0; i < nsig; i++) {
 269         int hash_nid, sign_nid;
 270         unsigned char rhash, rsign;
 271         const char *sstr = NULL;
 272         if (shared)
 273             SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 274                                    &rsign, &rhash);
 275         else
 276             SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL, &rsign, &rhash);
 277         if (i)
 278             BIO_puts(out, ":");
 279         sstr = get_sigtype(sign_nid);
 280         if (sstr)
 281             BIO_printf(out, "%s", sstr);
 282         else
 283             BIO_printf(out, "0x%02X", (int)rsign);
 284         if (hash_nid != NID_undef)
 285             BIO_printf(out, "+%s", OBJ_nid2sn(hash_nid));
 286         else if (sstr == NULL)
 287             BIO_printf(out, "+0x%02X", (int)rhash);
 288     }
 289     BIO_puts(out, "\n");
 290     return 1;
 291 }
 292
 293 int ssl_print_sigalgs(BIO *out, SSL *s)
 294 {
 295     int nid;
 296     if (!SSL_is_server(s))
 297         ssl_print_client_cert_types(out, s);
 298     do_print_sigalgs(out, s, 0);
 299     do_print_sigalgs(out, s, 1);
 300     if (SSL_get_peer_signature_nid(s, &nid) && nid != NID_undef)
 301         BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(nid));
 302     if (SSL_get_peer_signature_type_nid(s, &nid))
 303         BIO_printf(out, "Peer signature type: %s\n", get_sigtype(nid));
 304     return 1;
 305 }
 306
 307 #ifndef OPENSSL_NO_EC
 308 int ssl_print_point_formats(BIO *out, SSL *s)
 309 {
 310     int i, nformats;
 311     const char *pformats;
 312     nformats = SSL_get0_ec_point_formats(s, &pformats);
 313     if (nformats <= 0)
 314         return 1;
 315     BIO_puts(out, "Supported Elliptic Curve Point Formats: ");
 316     for (i = 0; i < nformats; i++, pformats++) {
 317         if (i)
 318             BIO_puts(out, ":");
 319         switch (*pformats) {
 320         case TLSEXT_ECPOINTFORMAT_uncompressed:
 321             BIO_puts(out, "uncompressed");
 322             break;
 323
 324         case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime:
 325             BIO_puts(out, "ansiX962_compressed_prime");
 326             break;
 327
 328         case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2:
 329             BIO_puts(out, "ansiX962_compressed_char2");
 330             break;
 331
 332         default:
 333             BIO_printf(out, "unknown(%d)", (int)*pformats);
 334             break;
 335
 336         }
 337     }
 338     BIO_puts(out, "\n");
 339     return 1;
 340 }
 341
 342 int ssl_print_groups(BIO *out, SSL *s, int noshared)
 343 {
 344     int i, ngroups, *groups, nid;
 345     const char *gname;
 346
 347     ngroups = SSL_get1_groups(s, NULL);
 348     if (ngroups <= 0)
 349         return 1;
 350     groups = app_malloc(ngroups * sizeof(int), "groups to print");
 351     SSL_get1_groups(s, groups);
 352
 353     BIO_puts(out, "Supported Elliptic Groups: ");
 354     for (i = 0; i < ngroups; i++) {
 355         if (i)
 356             BIO_puts(out, ":");
 357         nid = groups[i];
 358         /* If unrecognised print out hex version */
 359         if (nid & TLSEXT_nid_unknown) {
 360             BIO_printf(out, "0x%04X", nid & 0xFFFF);
 361         } else {
 362             /* TODO(TLS1.3): Get group name here */
 363             /* Use NIST name for curve if it exists */
 364             gname = EC_curve_nid2nist(nid);
 365             if (gname == NULL)
 366                 gname = OBJ_nid2sn(nid);
 367             BIO_printf(out, "%s", gname);
 368         }
 369     }
 370     OPENSSL_free(groups);
 371     if (noshared) {
 372         BIO_puts(out, "\n");
 373         return 1;
 374     }
 375     BIO_puts(out, "\nShared Elliptic groups: ");
 376     ngroups = SSL_get_shared_group(s, -1);
 377     for (i = 0; i < ngroups; i++) {
 378         if (i)
 379             BIO_puts(out, ":");
 380         nid = SSL_get_shared_group(s, i);
 381         /* TODO(TLS1.3): Convert for DH groups */
 382         gname = EC_curve_nid2nist(nid);
 383         if (gname == NULL)
 384             gname = OBJ_nid2sn(nid);
 385         BIO_printf(out, "%s", gname);
 386     }
 387     if (ngroups == 0)
 388         BIO_puts(out, "NONE");
 389     BIO_puts(out, "\n");
 390     return 1;
 391 }
 392 #endif
 393
 394 int ssl_print_tmp_key(BIO *out, SSL *s)
 395 {
 396     EVP_PKEY *key;
 397     if (!SSL_get_server_tmp_key(s, &key))
 398         return 1;
 399     BIO_puts(out, "Server Temp Key: ");
 400     switch (EVP_PKEY_id(key)) {
 401     case EVP_PKEY_RSA:
 402         BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
 403         break;
 404
 405     case EVP_PKEY_DH:
 406         BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
 407         break;
 408 #ifndef OPENSSL_NO_EC
 409     case EVP_PKEY_EC:
 410         {
 411             EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
 412             int nid;
 413             const char *cname;
 414             nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 415             EC_KEY_free(ec);
 416             cname = EC_curve_nid2nist(nid);
 417             if (cname == NULL)
 418                 cname = OBJ_nid2sn(nid);
 419             BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(key));
 420         }
 421     break;
 422 #endif
 423     default:
 424         BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(key)),
 425                    EVP_PKEY_bits(key));
 426     }
 427     EVP_PKEY_free(key);
 428     return 1;
 429 }
 430
 431 long bio_dump_callback(BIO *bio, int cmd, const char *argp,
 432                        int argi, long argl, long ret)
 433 {
 434     BIO *out;
 435
 436     out = (BIO *)BIO_get_callback_arg(bio);
 437     if (out == NULL)
 438         return ret;
 439
 440     if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
 441         BIO_printf(out, "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 442                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 443         BIO_dump(out, argp, (int)ret);
 444         return ret;
 445     } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
 446         BIO_printf(out, "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 447                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 448         BIO_dump(out, argp, (int)ret);
 449     }
 450     return ret;
 451 }
 452
 453 void apps_ssl_info_callback(const SSL *s, int where, int ret)
 454 {
 455     const char *str;
 456     int w;
 457
 458     w = where & ~SSL_ST_MASK;
 459
 460     if (w & SSL_ST_CONNECT)
 461         str = "SSL_connect";
 462     else if (w & SSL_ST_ACCEPT)
 463         str = "SSL_accept";
 464     else
 465         str = "undefined";
 466
 467     if (where & SSL_CB_LOOP) {
 468         BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
 469     } else if (where & SSL_CB_ALERT) {
 470         str = (where & SSL_CB_READ) ? "read" : "write";
 471         BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n",
 472                    str,
 473                    SSL_alert_type_string_long(ret),
 474                    SSL_alert_desc_string_long(ret));
 475     } else if (where & SSL_CB_EXIT) {
 476         if (ret == 0)
 477             BIO_printf(bio_err, "%s:failed in %s\n",
 478                        str, SSL_state_string_long(s));
 479         else if (ret < 0)
 480             BIO_printf(bio_err, "%s:error in %s\n",
 481                        str, SSL_state_string_long(s));
 482     }
 483 }
 484
 485 static STRINT_PAIR ssl_versions[] = {
 486     {"SSL 3.0", SSL3_VERSION},
 487     {"TLS 1.0", TLS1_VERSION},
 488     {"TLS 1.1", TLS1_1_VERSION},
 489     {"TLS 1.2", TLS1_2_VERSION},
 490     {"TLS 1.3", TLS1_3_VERSION},
 491     {"DTLS 1.0", DTLS1_VERSION},
 492     {"DTLS 1.0 (bad)", DTLS1_BAD_VER},
 493     {NULL}
 494 };
 495
 496 static STRINT_PAIR alert_types[] = {
 497     {" close_notify", 0},
 498     {" end_of_early_data", 1},
 499     {" unexpected_message", 10},
 500     {" bad_record_mac", 20},
 501     {" decryption_failed", 21},
 502     {" record_overflow", 22},
 503     {" decompression_failure", 30},
 504     {" handshake_failure", 40},
 505     {" bad_certificate", 42},
 506     {" unsupported_certificate", 43},
 507     {" certificate_revoked", 44},
 508     {" certificate_expired", 45},
 509     {" certificate_unknown", 46},
 510     {" illegal_parameter", 47},
 511     {" unknown_ca", 48},
 512     {" access_denied", 49},
 513     {" decode_error", 50},
 514     {" decrypt_error", 51},
 515     {" export_restriction", 60},
 516     {" protocol_version", 70},
 517     {" insufficient_security", 71},
 518     {" internal_error", 80},
 519     {" inappropriate_fallback", 86},
 520     {" user_canceled", 90},
 521     {" no_renegotiation", 100},
 522     {" missing_extension", 109},
 523     {" unsupported_extension", 110},
 524     {" certificate_unobtainable", 111},
 525     {" unrecognized_name", 112},
 526     {" bad_certificate_status_response", 113},
 527     {" bad_certificate_hash_value", 114},
 528     {" unknown_psk_identity", 115},
 529     {" certificate_required", 116},
 530     {NULL}
 531 };
 532
 533 static STRINT_PAIR handshakes[] = {
 534     {", HelloRequest", SSL3_MT_HELLO_REQUEST},
 535     {", ClientHello", SSL3_MT_CLIENT_HELLO},
 536     {", ServerHello", SSL3_MT_SERVER_HELLO},
 537     {", HelloVerifyRequest", DTLS1_MT_HELLO_VERIFY_REQUEST},
 538     {", NewSessionTicket", SSL3_MT_NEWSESSION_TICKET},
 539     {", EndOfEarlyData", SSL3_MT_END_OF_EARLY_DATA},
 540     {", EncryptedExtensions", SSL3_MT_ENCRYPTED_EXTENSIONS},
 541     {", Certificate", SSL3_MT_CERTIFICATE},
 542     {", ServerKeyExchange", SSL3_MT_SERVER_KEY_EXCHANGE},
 543     {", CertificateRequest", SSL3_MT_CERTIFICATE_REQUEST},
 544     {", ServerHelloDone", SSL3_MT_SERVER_DONE},
 545     {", CertificateVerify", SSL3_MT_CERTIFICATE_VERIFY},
 546     {", ClientKeyExchange", SSL3_MT_CLIENT_KEY_EXCHANGE},
 547     {", Finished", SSL3_MT_FINISHED},
 548     {", CertificateUrl", SSL3_MT_CERTIFICATE_URL},
 549     {", CertificateStatus", SSL3_MT_CERTIFICATE_STATUS},
 550     {", SupplementalData", SSL3_MT_SUPPLEMENTAL_DATA},
 551     {", KeyUpdate", SSL3_MT_KEY_UPDATE},
 552 #ifndef OPENSSL_NO_NEXTPROTONEG
 553     {", NextProto", SSL3_MT_NEXT_PROTO},
 554 #endif
 555     {", MessageHash", SSL3_MT_MESSAGE_HASH},
 556     {NULL}
 557 };
 558
 559 void msg_cb(int write_p, int version, int content_type, const void *buf,
 560             size_t len, SSL *ssl, void *arg)
 561 {
 562     BIO *bio = arg;
 563     const char *str_write_p = write_p ? ">>>" : "<<<";
 564     const char *str_version = lookup(version, ssl_versions, "???");
 565     const char *str_content_type = "", *str_details1 = "", *str_details2 = "";
 566     const unsigned char* bp = buf;
 567
 568     if (version == SSL3_VERSION ||
 569         version == TLS1_VERSION ||
 570         version == TLS1_1_VERSION ||
 571         version == TLS1_2_VERSION ||
 572         version == TLS1_3_VERSION ||
 573         version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
 574         switch (content_type) {
 575         case 20:
 576             str_content_type = ", ChangeCipherSpec";
 577             break;
 578         case 21:
 579             str_content_type = ", Alert";
 580             str_details1 = ", ???";
 581             if (len == 2) {
 582                 switch (bp[0]) {
 583                 case 1:
 584                     str_details1 = ", warning";
 585                     break;
 586                 case 2:
 587                     str_details1 = ", fatal";
 588                     break;
 589                 }
 590                 str_details2 = lookup((int)bp[1], alert_types, " ???");
 591             }
 592             break;
 593         case 22:
 594             str_content_type = ", Handshake";
 595             str_details1 = "???";
 596             if (len > 0)
 597                 str_details1 = lookup((int)bp[0], handshakes, "???");
 598             break;
 599         case 23:
 600             str_content_type = ", ApplicationData";
 601             break;
 602 #ifndef OPENSSL_NO_HEARTBEATS
 603         case 24:
 604             str_details1 = ", Heartbeat";
 605
 606             if (len > 0) {
 607                 switch (bp[0]) {
 608                 case 1:
 609                     str_details1 = ", HeartbeatRequest";
 610                     break;
 611                 case 2:
 612                     str_details1 = ", HeartbeatResponse";
 613                     break;
 614                 }
 615             }
 616             break;
 617 #endif
 618         }
 619     }
 620
 621     BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version,
 622                str_content_type, (unsigned long)len, str_details1,
 623                str_details2);
 624
 625     if (len > 0) {
 626         size_t num, i;
 627
 628         BIO_printf(bio, "   ");
 629         num = len;
 630         for (i = 0; i < num; i++) {
 631             if (i % 16 == 0 && i > 0)
 632                 BIO_printf(bio, "\n   ");
 633             BIO_printf(bio, " %02x", ((const unsigned char *)buf)[i]);
 634         }
 635         if (i < len)
 636             BIO_printf(bio, " ...");
 637         BIO_printf(bio, "\n");
 638     }
 639     (void)BIO_flush(bio);
 640 }
 641
 642 static STRINT_PAIR tlsext_types[] = {
 643     {"server name", TLSEXT_TYPE_server_name},
 644     {"max fragment length", TLSEXT_TYPE_max_fragment_length},
 645     {"client certificate URL", TLSEXT_TYPE_client_certificate_url},
 646     {"trusted CA keys", TLSEXT_TYPE_trusted_ca_keys},
 647     {"truncated HMAC", TLSEXT_TYPE_truncated_hmac},
 648     {"status request", TLSEXT_TYPE_status_request},
 649     {"user mapping", TLSEXT_TYPE_user_mapping},
 650     {"client authz", TLSEXT_TYPE_client_authz},
 651     {"server authz", TLSEXT_TYPE_server_authz},
 652     {"cert type", TLSEXT_TYPE_cert_type},
 653     {"supported_groups", TLSEXT_TYPE_supported_groups},
 654     {"EC point formats", TLSEXT_TYPE_ec_point_formats},
 655     {"SRP", TLSEXT_TYPE_srp},
 656     {"signature algorithms", TLSEXT_TYPE_signature_algorithms},
 657     {"use SRTP", TLSEXT_TYPE_use_srtp},
 658     {"heartbeat", TLSEXT_TYPE_heartbeat},
 659     {"session ticket", TLSEXT_TYPE_session_ticket},
 660     {"renegotiation info", TLSEXT_TYPE_renegotiate},
 661     {"signed certificate timestamps", TLSEXT_TYPE_signed_certificate_timestamp},
 662     {"TLS padding", TLSEXT_TYPE_padding},
 663 #ifdef TLSEXT_TYPE_next_proto_neg
 664     {"next protocol", TLSEXT_TYPE_next_proto_neg},
 665 #endif
 666 #ifdef TLSEXT_TYPE_encrypt_then_mac
 667     {"encrypt-then-mac", TLSEXT_TYPE_encrypt_then_mac},
 668 #endif
 669 #ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
 670     {"application layer protocol negotiation",
 671      TLSEXT_TYPE_application_layer_protocol_negotiation},
 672 #endif
 673 #ifdef TLSEXT_TYPE_extended_master_secret
 674     {"extended master secret", TLSEXT_TYPE_extended_master_secret},
 675 #endif
 676     {"key share", TLSEXT_TYPE_key_share},
 677     {"supported versions", TLSEXT_TYPE_supported_versions},
 678     {"psk", TLSEXT_TYPE_psk},
 679     {"psk kex modes", TLSEXT_TYPE_psk_kex_modes},
 680     {"certificate authorities", TLSEXT_TYPE_certificate_authorities},
 681     {"post handshake auth", TLSEXT_TYPE_post_handshake_auth},
 682     {NULL}
 683 };
 684
 685 void tlsext_cb(SSL *s, int client_server, int type,
 686                const unsigned char *data, int len, void *arg)
 687 {
 688     BIO *bio = arg;
 689     const char *extname = lookup(type, tlsext_types, "unknown");
 690
 691     BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 692                client_server ? "server" : "client", extname, type, len);
 693     BIO_dump(bio, (const char *)data, len);
 694     (void)BIO_flush(bio);
 695 }
 696
 697 #ifndef OPENSSL_NO_SOCK
 698 int generate_cookie_callback(SSL *ssl, unsigned char *cookie,
 699                              unsigned int *cookie_len)
 700 {
 701     unsigned char *buffer;
 702     size_t length = 0;
 703     unsigned short port;
 704     BIO_ADDR *lpeer = NULL, *peer = NULL;
 705
 706     /* Initialize a random secret */
 707     if (!cookie_initialized) {
 708         if (RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH) <= 0) {
 709             BIO_printf(bio_err, "error setting random cookie secret\n");
 710             return 0;
 711         }
 712         cookie_initialized = 1;
 713     }
 714
 715     if (SSL_is_dtls(ssl)) {
 716         lpeer = peer = BIO_ADDR_new();
 717         if (peer == NULL) {
 718             BIO_printf(bio_err, "memory full\n");
 719             return 0;
 720         }
 721
 722         /* Read peer information */
 723         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), peer);
 724     } else {
 725         peer = ourpeer;
 726     }
 727
 728     /* Create buffer with peer's address and port */
 729     if (!BIO_ADDR_rawaddress(peer, NULL, &length)) {
 730         BIO_printf(bio_err, "Failed getting peer address\n");
 731         return 0;
 732     }
 733     OPENSSL_assert(length != 0);
 734     port = BIO_ADDR_rawport(peer);
 735     length += sizeof(port);
 736     buffer = app_malloc(length, "cookie generate buffer");
 737
 738     memcpy(buffer, &port, sizeof(port));
 739     BIO_ADDR_rawaddress(peer, buffer + sizeof(port), NULL);
 740
 741     /* Calculate HMAC of buffer using the secret */
 742     HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 743          buffer, length, cookie, cookie_len);
 744
 745     OPENSSL_free(buffer);
 746     BIO_ADDR_free(lpeer);
 747
 748     return 1;
 749 }
 750
 751 int verify_cookie_callback(SSL *ssl, const unsigned char *cookie,
 752                            unsigned int cookie_len)
 753 {
 754     unsigned char result[EVP_MAX_MD_SIZE];
 755     unsigned int resultlength;
 756
 757     /* Note: we check cookie_initialized because if it's not,
 758      * it cannot be valid */
 759     if (cookie_initialized
 760         && generate_cookie_callback(ssl, result, &resultlength)
 761         && cookie_len == resultlength
 762         && memcmp(result, cookie, resultlength) == 0)
 763         return 1;
 764
 765     return 0;
 766 }
 767
 768 int generate_stateless_cookie_callback(SSL *ssl, unsigned char *cookie,
 769                                        size_t *cookie_len)
 770 {
 771     unsigned int temp;
 772     int res = generate_cookie_callback(ssl, cookie, &temp);
 773     *cookie_len = temp;
 774     return res;
 775 }
 776
 777 int verify_stateless_cookie_callback(SSL *ssl, const unsigned char *cookie,
 778                                      size_t cookie_len)
 779 {
 780     return verify_cookie_callback(ssl, cookie, cookie_len);
 781 }
 782
 783 #endif
 784
 785 /*
 786  * Example of extended certificate handling. Where the standard support of
 787  * one certificate per algorithm is not sufficient an application can decide
 788  * which certificate(s) to use at runtime based on whatever criteria it deems
 789  * appropriate.
 790  */
 791
 792 /* Linked list of certificates, keys and chains */
 793 struct ssl_excert_st {
 794     int certform;
 795     const char *certfile;
 796     int keyform;
 797     const char *keyfile;
 798     const char *chainfile;
 799     X509 *cert;
 800     EVP_PKEY *key;
 801     STACK_OF(X509) *chain;
 802     int build_chain;
 803     struct ssl_excert_st *next, *prev;
 804 };
 805
 806 static STRINT_PAIR chain_flags[] = {
 807     {"Overall Validity", CERT_PKEY_VALID},
 808     {"Sign with EE key", CERT_PKEY_SIGN},
 809     {"EE signature", CERT_PKEY_EE_SIGNATURE},
 810     {"CA signature", CERT_PKEY_CA_SIGNATURE},
 811     {"EE key parameters", CERT_PKEY_EE_PARAM},
 812     {"CA key parameters", CERT_PKEY_CA_PARAM},
 813     {"Explicitly sign with EE key", CERT_PKEY_EXPLICIT_SIGN},
 814     {"Issuer Name", CERT_PKEY_ISSUER_NAME},
 815     {"Certificate Type", CERT_PKEY_CERT_TYPE},
 816     {NULL}
 817 };
 818
 819 static void print_chain_flags(SSL *s, int flags)
 820 {
 821     STRINT_PAIR *pp;
 822
 823     for (pp = chain_flags; pp->name; ++pp)
 824         BIO_printf(bio_err, "\t%s: %s\n",
 825                    pp->name,
 826                    (flags & pp->retval) ? "OK" : "NOT OK");
 827     BIO_printf(bio_err, "\tSuite B: ");
 828     if (SSL_set_cert_flags(s, 0) & SSL_CERT_FLAG_SUITEB_128_LOS)
 829         BIO_puts(bio_err, flags & CERT_PKEY_SUITEB ? "OK\n" : "NOT OK\n");
 830     else
 831         BIO_printf(bio_err, "not tested\n");
 832 }
 833
 834 /*
 835  * Very basic selection callback: just use any certificate chain reported as
 836  * valid. More sophisticated could prioritise according to local policy.
 837  */
 838 static int set_cert_cb(SSL *ssl, void *arg)
 839 {
 840     int i, rv;
 841     SSL_EXCERT *exc = arg;
 842 #ifdef CERT_CB_TEST_RETRY
 843     static int retry_cnt;
 844     if (retry_cnt < 5) {
 845         retry_cnt++;
 846         BIO_printf(bio_err,
 847                    "Certificate callback retry test: count %d\n",
 848                    retry_cnt);
 849         return -1;
 850     }
 851 #endif
 852     SSL_certs_clear(ssl);
 853
 854     if (exc == NULL)
 855         return 1;
 856
 857     /*
 858      * Go to end of list and traverse backwards since we prepend newer
 859      * entries this retains the original order.
 860      */
 861     while (exc->next != NULL)
 862         exc = exc->next;
 863
 864     i = 0;
 865
 866     while (exc != NULL) {
 867         i++;
 868         rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
 869         BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
 870         X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
 871                            get_nameopt());
 872         BIO_puts(bio_err, "\n");
 873         print_chain_flags(ssl, rv);
 874         if (rv & CERT_PKEY_VALID) {
 875             if (!SSL_use_certificate(ssl, exc->cert)
 876                     || !SSL_use_PrivateKey(ssl, exc->key)) {
 877                 return 0;
 878             }
 879             /*
 880              * NB: we wouldn't normally do this as it is not efficient
 881              * building chains on each connection better to cache the chain
 882              * in advance.
 883              */
 884             if (exc->build_chain) {
 885                 if (!SSL_build_cert_chain(ssl, 0))
 886                     return 0;
 887             } else if (exc->chain != NULL) {
 888                 SSL_set1_chain(ssl, exc->chain);
 889             }
 890         }
 891         exc = exc->prev;
 892     }
 893     return 1;
 894 }
 895
 896 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
 897 {
 898     SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
 899 }
 900
 901 static int ssl_excert_prepend(SSL_EXCERT **pexc)
 902 {
 903     SSL_EXCERT *exc = app_malloc(sizeof(*exc), "prepend cert");
 904
 905     memset(exc, 0, sizeof(*exc));
 906
 907     exc->next = *pexc;
 908     *pexc = exc;
 909
 910     if (exc->next) {
 911         exc->certform = exc->next->certform;
 912         exc->keyform = exc->next->keyform;
 913         exc->next->prev = exc;
 914     } else {
 915         exc->certform = FORMAT_PEM;
 916         exc->keyform = FORMAT_PEM;
 917     }
 918     return 1;
 919
 920 }
 921
 922 void ssl_excert_free(SSL_EXCERT *exc)
 923 {
 924     SSL_EXCERT *curr;
 925
 926     if (exc == NULL)
 927         return;
 928     while (exc) {
 929         X509_free(exc->cert);
 930         EVP_PKEY_free(exc->key);
 931         sk_X509_pop_free(exc->chain, X509_free);
 932         curr = exc;
 933         exc = exc->next;
 934         OPENSSL_free(curr);
 935     }
 936 }
 937
 938 int load_excert(SSL_EXCERT **pexc)
 939 {
 940     SSL_EXCERT *exc = *pexc;
 941     if (exc == NULL)
 942         return 1;
 943     /* If nothing in list, free and set to NULL */
 944     if (exc->certfile == NULL && exc->next == NULL) {
 945         ssl_excert_free(exc);
 946         *pexc = NULL;
 947         return 1;
 948     }
 949     for (; exc; exc = exc->next) {
 950         if (exc->certfile == NULL) {
 951             BIO_printf(bio_err, "Missing filename\n");
 952             return 0;
 953         }
 954         exc->cert = load_cert(exc->certfile, exc->certform,
 955                               "Server Certificate");
 956         if (exc->cert == NULL)
 957             return 0;
 958         if (exc->keyfile != NULL) {
 959             exc->key = load_key(exc->keyfile, exc->keyform,
 960                                 0, NULL, NULL, "Server Key");
 961         } else {
 962             exc->key = load_key(exc->certfile, exc->certform,
 963                                 0, NULL, NULL, "Server Key");
 964         }
 965         if (exc->key == NULL)
 966             return 0;
 967         if (exc->chainfile != NULL) {
 968             if (!load_certs(exc->chainfile, &exc->chain, FORMAT_PEM, NULL,
 969                             "Server Chain"))
 970                 return 0;
 971         }
 972     }
 973     return 1;
 974 }
 975
 976 enum range { OPT_X_ENUM };
 977
 978 int args_excert(int opt, SSL_EXCERT **pexc)
 979 {
 980     SSL_EXCERT *exc = *pexc;
 981
 982     assert(opt > OPT_X__FIRST);
 983     assert(opt < OPT_X__LAST);
 984
 985     if (exc == NULL) {
 986         if (!ssl_excert_prepend(&exc)) {
 987             BIO_printf(bio_err, " %s: Error initialising xcert\n",
 988                        opt_getprog());
 989             goto err;
 990         }
 991         *pexc = exc;
 992     }
 993
 994     switch ((enum range)opt) {
 995     case OPT_X__FIRST:
 996     case OPT_X__LAST:
 997         return 0;
 998     case OPT_X_CERT:
 999         if (exc->certfile != NULL && !ssl_excert_prepend(&exc)) {
1000             BIO_printf(bio_err, "%s: Error adding xcert\n", opt_getprog());
1001             goto err;
1002         }
1003         *pexc = exc;
1004         exc->certfile = opt_arg();
1005         break;
1006     case OPT_X_KEY:
1007         if (exc->keyfile != NULL) {
1008             BIO_printf(bio_err, "%s: Key already specified\n", opt_getprog());
1009             goto err;
1010         }
1011         exc->keyfile = opt_arg();
1012         break;
1013     case OPT_X_CHAIN:
1014         if (exc->chainfile != NULL) {
1015             BIO_printf(bio_err, "%s: Chain already specified\n",
1016                        opt_getprog());
1017             goto err;
1018         }
1019         exc->chainfile = opt_arg();
1020         break;
1021     case OPT_X_CHAIN_BUILD:
1022         exc->build_chain = 1;
1023         break;
1024     case OPT_X_CERTFORM:
1025         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->certform))
1026             return 0;
1027         break;
1028     case OPT_X_KEYFORM:
1029         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->keyform))
1030             return 0;
1031         break;
1032     }
1033     return 1;
1034
1035  err:
1036     ERR_print_errors(bio_err);
1037     ssl_excert_free(exc);
1038     *pexc = NULL;
1039     return 0;
1040 }
1041
1042 static void print_raw_cipherlist(SSL *s)
1043 {
1044     const unsigned char *rlist;
1045     static const unsigned char scsv_id[] = { 0, 0xFF };
1046     size_t i, rlistlen, num;
1047     if (!SSL_is_server(s))
1048         return;
1049     num = SSL_get0_raw_cipherlist(s, NULL);
1050     OPENSSL_assert(num == 2);
1051     rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
1052     BIO_puts(bio_err, "Client cipher list: ");
1053     for (i = 0; i < rlistlen; i += num, rlist += num) {
1054         const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
1055         if (i)
1056             BIO_puts(bio_err, ":");
1057         if (c != NULL) {
1058             BIO_puts(bio_err, SSL_CIPHER_get_name(c));
1059         } else if (memcmp(rlist, scsv_id, num) == 0) {
1060             BIO_puts(bio_err, "SCSV");
1061         } else {
1062             size_t j;
1063             BIO_puts(bio_err, "0x");
1064             for (j = 0; j < num; j++)
1065                 BIO_printf(bio_err, "%02X", rlist[j]);
1066         }
1067     }
1068     BIO_puts(bio_err, "\n");
1069 }
1070
1071 /*
1072  * Hex encoder for TLSA RRdata, not ':' delimited.
1073  */
1074 static char *hexencode(const unsigned char *data, size_t len)
1075 {
1076     static const char *hex = "0123456789abcdef";
1077     char *out;
1078     char *cp;
1079     size_t outlen = 2 * len + 1;
1080     int ilen = (int) outlen;
1081
1082     if (outlen < len || ilen < 0 || outlen != (size_t)ilen) {
1083         BIO_printf(bio_err, "%s: %zu-byte buffer too large to hexencode\n",
1084                    opt_getprog(), len);
1085         exit(1);
1086     }
1087     cp = out = app_malloc(ilen, "TLSA hex data buffer");
1088
1089     while (len-- > 0) {
1090         *cp++ = hex[(*data >> 4) & 0x0f];
1091         *cp++ = hex[*data++ & 0x0f];
1092     }
1093     *cp = '\0';
1094     return out;
1095 }
1096
1097 void print_verify_detail(SSL *s, BIO *bio)
1098 {
1099     int mdpth;
1100     EVP_PKEY *mspki;
1101     long verify_err = SSL_get_verify_result(s);
1102
1103     if (verify_err == X509_V_OK) {
1104         const char *peername = SSL_get0_peername(s);
1105
1106         BIO_printf(bio, "Verification: OK\n");
1107         if (peername != NULL)
1108             BIO_printf(bio, "Verified peername: %s\n", peername);
1109     } else {
1110         const char *reason = X509_verify_cert_error_string(verify_err);
1111
1112         BIO_printf(bio, "Verification error: %s\n", reason);
1113     }
1114
1115     if ((mdpth = SSL_get0_dane_authority(s, NULL, &mspki)) >= 0) {
1116         uint8_t usage, selector, mtype;
1117         const unsigned char *data = NULL;
1118         size_t dlen = 0;
1119         char *hexdata;
1120
1121         mdpth = SSL_get0_dane_tlsa(s, &usage, &selector, &mtype, &data, &dlen);
1122
1123         /*
1124          * The TLSA data field can be quite long when it is a certificate,
1125          * public key or even a SHA2-512 digest.  Because the initial octets of
1126          * ASN.1 certificates and public keys contain mostly boilerplate OIDs
1127          * and lengths, we show the last 12 bytes of the data instead, as these
1128          * are more likely to distinguish distinct TLSA records.
1129          */
1130 #define TLSA_TAIL_SIZE 12
1131         if (dlen > TLSA_TAIL_SIZE)
1132             hexdata = hexencode(data + dlen - TLSA_TAIL_SIZE, TLSA_TAIL_SIZE);
1133         else
1134             hexdata = hexencode(data, dlen);
1135         BIO_printf(bio, "DANE TLSA %d %d %d %s%s %s at depth %d\n",
1136                    usage, selector, mtype,
1137                    (dlen > TLSA_TAIL_SIZE) ? "..." : "", hexdata,
1138                    (mspki != NULL) ? "signed the certificate" :
1139                    mdpth ? "matched TA certificate" : "matched EE certificate",
1140                    mdpth);
1141         OPENSSL_free(hexdata);
1142     }
1143 }
1144
1145 void print_ssl_summary(SSL *s)
1146 {
1147     const SSL_CIPHER *c;
1148     X509 *peer;
1149
1150     BIO_printf(bio_err, "Protocol version: %s\n", SSL_get_version(s));
1151     print_raw_cipherlist(s);
1152     c = SSL_get_current_cipher(s);
1153     BIO_printf(bio_err, "Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
1154     do_print_sigalgs(bio_err, s, 0);
1155     peer = SSL_get_peer_certificate(s);
1156     if (peer != NULL) {
1157         int nid;
1158
1159         BIO_puts(bio_err, "Peer certificate: ");
1160         X509_NAME_print_ex(bio_err, X509_get_subject_name(peer),
1161                            0, get_nameopt());
1162         BIO_puts(bio_err, "\n");
1163         if (SSL_get_peer_signature_nid(s, &nid))
1164             BIO_printf(bio_err, "Hash used: %s\n", OBJ_nid2sn(nid));
1165         if (SSL_get_peer_signature_type_nid(s, &nid))
1166             BIO_printf(bio_err, "Signature type: %s\n", get_sigtype(nid));
1167         print_verify_detail(s, bio_err);
1168     } else {
1169         BIO_puts(bio_err, "No peer certificate\n");
1170     }
1171     X509_free(peer);
1172 #ifndef OPENSSL_NO_EC
1173     ssl_print_point_formats(bio_err, s);
1174     if (SSL_is_server(s))
1175         ssl_print_groups(bio_err, s, 1);
1176     else
1177         ssl_print_tmp_key(bio_err, s);
1178 #else
1179     if (!SSL_is_server(s))
1180         ssl_print_tmp_key(bio_err, s);
1181 #endif
1182 }
1183
1184 int config_ctx(SSL_CONF_CTX *cctx, STACK_OF(OPENSSL_STRING) *str,
1185                SSL_CTX *ctx)
1186 {
1187     int i;
1188
1189     SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
1190     for (i = 0; i < sk_OPENSSL_STRING_num(str); i += 2) {
1191         const char *flag = sk_OPENSSL_STRING_value(str, i);
1192         const char *arg = sk_OPENSSL_STRING_value(str, i + 1);
1193         if (SSL_CONF_cmd(cctx, flag, arg) <= 0) {
1194             if (arg != NULL)
1195                 BIO_printf(bio_err, "Error with command: \"%s %s\"\n",
1196                            flag, arg);
1197             else
1198                 BIO_printf(bio_err, "Error with command: \"%s\"\n", flag);
1199             ERR_print_errors(bio_err);
1200             return 0;
1201         }
1202     }
1203     if (!SSL_CONF_CTX_finish(cctx)) {
1204         BIO_puts(bio_err, "Error finishing context\n");
1205         ERR_print_errors(bio_err);
1206         return 0;
1207     }
1208     return 1;
1209 }
1210
1211 static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
1212 {
1213     X509_CRL *crl;
1214     int i;
1215     for (i = 0; i < sk_X509_CRL_num(crls); i++) {
1216         crl = sk_X509_CRL_value(crls, i);
1217         X509_STORE_add_crl(st, crl);
1218     }
1219     return 1;
1220 }
1221
1222 int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls, int crl_download)
1223 {
1224     X509_STORE *st;
1225     st = SSL_CTX_get_cert_store(ctx);
1226     add_crls_store(st, crls);
1227     if (crl_download)
1228         store_setup_crl_download(st);
1229     return 1;
1230 }
1231
1232 int ssl_load_stores(SSL_CTX *ctx,
1233                     const char *vfyCApath, const char *vfyCAfile,
1234                     const char *chCApath, const char *chCAfile,
1235                     STACK_OF(X509_CRL) *crls, int crl_download)
1236 {
1237     X509_STORE *vfy = NULL, *ch = NULL;
1238     int rv = 0;
1239     if (vfyCApath != NULL || vfyCAfile != NULL) {
1240         vfy = X509_STORE_new();
1241         if (vfy == NULL)
1242             goto err;
1243         if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
1244             goto err;
1245         add_crls_store(vfy, crls);
1246         SSL_CTX_set1_verify_cert_store(ctx, vfy);
1247         if (crl_download)
1248             store_setup_crl_download(vfy);
1249     }
1250     if (chCApath != NULL || chCAfile != NULL) {
1251         ch = X509_STORE_new();
1252         if (ch == NULL)
1253             goto err;
1254         if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
1255             goto err;
1256         SSL_CTX_set1_chain_cert_store(ctx, ch);
1257     }
1258     rv = 1;
1259  err:
1260     X509_STORE_free(vfy);
1261     X509_STORE_free(ch);
1262     return rv;
1263 }
1264
1265 /* Verbose print out of security callback */
1266
1267 typedef struct {
1268     BIO *out;
1269     int verbose;
1270     int (*old_cb) (const SSL *s, const SSL_CTX *ctx, int op, int bits, int nid,
1271                    void *other, void *ex);
1272 } security_debug_ex;
1273
1274 static STRINT_PAIR callback_types[] = {
1275     {"Supported Ciphersuite", SSL_SECOP_CIPHER_SUPPORTED},
1276     {"Shared Ciphersuite", SSL_SECOP_CIPHER_SHARED},
1277     {"Check Ciphersuite", SSL_SECOP_CIPHER_CHECK},
1278 #ifndef OPENSSL_NO_DH
1279     {"Temp DH key bits", SSL_SECOP_TMP_DH},
1280 #endif
1281     {"Supported Curve", SSL_SECOP_CURVE_SUPPORTED},
1282     {"Shared Curve", SSL_SECOP_CURVE_SHARED},
1283     {"Check Curve", SSL_SECOP_CURVE_CHECK},
1284     {"Supported Signature Algorithm digest", SSL_SECOP_SIGALG_SUPPORTED},
1285     {"Shared Signature Algorithm digest", SSL_SECOP_SIGALG_SHARED},
1286     {"Check Signature Algorithm digest", SSL_SECOP_SIGALG_CHECK},
1287     {"Signature Algorithm mask", SSL_SECOP_SIGALG_MASK},
1288     {"Certificate chain EE key", SSL_SECOP_EE_KEY},
1289     {"Certificate chain CA key", SSL_SECOP_CA_KEY},
1290     {"Peer Chain EE key", SSL_SECOP_PEER_EE_KEY},
1291     {"Peer Chain CA key", SSL_SECOP_PEER_CA_KEY},
1292     {"Certificate chain CA digest", SSL_SECOP_CA_MD},
1293     {"Peer chain CA digest", SSL_SECOP_PEER_CA_MD},
1294     {"SSL compression", SSL_SECOP_COMPRESSION},
1295     {"Session ticket", SSL_SECOP_TICKET},
1296     {NULL}
1297 };
1298
1299 static int security_callback_debug(const SSL *s, const SSL_CTX *ctx,
1300                                    int op, int bits, int nid,
1301                                    void *other, void *ex)
1302 {
1303     security_debug_ex *sdb = ex;
1304     int rv, show_bits = 1, cert_md = 0;
1305     const char *nm;
1306     rv = sdb->old_cb(s, ctx, op, bits, nid, other, ex);
1307     if (rv == 1 && sdb->verbose < 2)
1308         return 1;
1309     BIO_puts(sdb->out, "Security callback: ");
1310
1311     nm = lookup(op, callback_types, NULL);
1312     switch (op) {
1313     case SSL_SECOP_TICKET:
1314     case SSL_SECOP_COMPRESSION:
1315         show_bits = 0;
1316         nm = NULL;
1317         break;
1318     case SSL_SECOP_VERSION:
1319         BIO_printf(sdb->out, "Version=%s", lookup(nid, ssl_versions, "???"));
1320         show_bits = 0;
1321         nm = NULL;
1322         break;
1323     case SSL_SECOP_CA_MD:
1324     case SSL_SECOP_PEER_CA_MD:
1325         cert_md = 1;
1326         break;
1327     }
1328     if (nm != NULL)
1329         BIO_printf(sdb->out, "%s=", nm);
1330
1331     switch (op & SSL_SECOP_OTHER_TYPE) {
1332
1333     case SSL_SECOP_OTHER_CIPHER:
1334         BIO_puts(sdb->out, SSL_CIPHER_get_name(other));
1335         break;
1336
1337 #ifndef OPENSSL_NO_EC
1338     case SSL_SECOP_OTHER_CURVE:
1339         {
1340             const char *cname;
1341             cname = EC_curve_nid2nist(nid);
1342             if (cname == NULL)
1343                 cname = OBJ_nid2sn(nid);
1344             BIO_puts(sdb->out, cname);
1345         }
1346         break;
1347 #endif
1348 #ifndef OPENSSL_NO_DH
1349     case SSL_SECOP_OTHER_DH:
1350         {
1351             DH *dh = other;
1352             BIO_printf(sdb->out, "%d", DH_bits(dh));
1353             break;
1354         }
1355 #endif
1356     case SSL_SECOP_OTHER_CERT:
1357         {
1358             if (cert_md) {
1359                 int sig_nid = X509_get_signature_nid(other);
1360                 BIO_puts(sdb->out, OBJ_nid2sn(sig_nid));
1361             } else {
1362                 EVP_PKEY *pkey = X509_get0_pubkey(other);
1363                 const char *algname = "";
1364                 EVP_PKEY_asn1_get0_info(NULL, NULL, NULL, NULL,
1365                                         &algname, EVP_PKEY_get0_asn1(pkey));
1366                 BIO_printf(sdb->out, "%s, bits=%d",
1367                            algname, EVP_PKEY_bits(pkey));
1368             }
1369             break;
1370         }
1371     case SSL_SECOP_OTHER_SIGALG:
1372         {
1373             const unsigned char *salg = other;
1374             const char *sname = NULL;
1375             switch (salg[1]) {
1376             case TLSEXT_signature_anonymous:
1377                 sname = "anonymous";
1378                 break;
1379             case TLSEXT_signature_rsa:
1380                 sname = "RSA";
1381                 break;
1382             case TLSEXT_signature_dsa:
1383                 sname = "DSA";
1384                 break;
1385             case TLSEXT_signature_ecdsa:
1386                 sname = "ECDSA";
1387                 break;
1388             }
1389
1390             BIO_puts(sdb->out, OBJ_nid2sn(nid));
1391             if (sname)
1392                 BIO_printf(sdb->out, ", algorithm=%s", sname);
1393             else
1394                 BIO_printf(sdb->out, ", algid=%d", salg[1]);
1395             break;
1396         }
1397
1398     }
1399
1400     if (show_bits)
1401         BIO_printf(sdb->out, ", security bits=%d", bits);
1402     BIO_printf(sdb->out, ": %s\n", rv ? "yes" : "no");
1403     return rv;
1404 }
1405
1406 void ssl_ctx_security_debug(SSL_CTX *ctx, int verbose)
1407 {
1408     static security_debug_ex sdb;
1409
1410     sdb.out = bio_err;
1411     sdb.verbose = verbose;
1412     sdb.old_cb = SSL_CTX_get_security_callback(ctx);
1413     SSL_CTX_set_security_callback(ctx, security_callback_debug);
1414     SSL_CTX_set0_security_ex_data(ctx, &sdb);
1415 }
1416
1417 static void keylog_callback(const SSL *ssl, const char *line)
1418 {
1419     if (bio_keylog == NULL) {
1420         BIO_printf(bio_err, "Keylog callback is invoked without valid file!\n");
1421         return;
1422     }
1423
1424     /*
1425      * There might be concurrent writers to the keylog file, so we must ensure
1426      * that the given line is written at once.
1427      */
1428     BIO_printf(bio_keylog, "%s\n", line);
1429     (void)BIO_flush(bio_keylog);
1430 }
1431
1432 int set_keylog_file(SSL_CTX *ctx, const char *keylog_file)
1433 {
1434     /* Close any open files */
1435     BIO_free_all(bio_keylog);
1436     bio_keylog = NULL;
1437
1438     if (ctx == NULL || keylog_file == NULL) {
1439         /* Keylogging is disabled, OK. */
1440         return 0;
1441     }
1442
1443     /*
1444      * Append rather than write in order to allow concurrent modification.
1445      * Furthermore, this preserves existing keylog files which is useful when
1446      * the tool is run multiple times.
1447      */
1448     bio_keylog = BIO_new_file(keylog_file, "a");
1449     if (bio_keylog == NULL) {
1450         BIO_printf(bio_err, "Error writing keylog file %s\n", keylog_file);
1451         return 1;
1452     }
1453
1454     /* Write a header for seekable, empty files (this excludes pipes). */
1455     if (BIO_tell(bio_keylog) == 0) {
1456         BIO_puts(bio_keylog,
1457                  "# SSL/TLS secrets log file, generated by OpenSSL\n");
1458         (void)BIO_flush(bio_keylog);
1459     }
1460     SSL_CTX_set_keylog_callback(ctx, keylog_callback);
1461     return 0;
1462 }
1463
1464 void print_ca_names(BIO *bio, SSL *s)
1465 {
1466     const char *cs = SSL_is_server(s) ? "server" : "client";
1467     const STACK_OF(X509_NAME) *sk = SSL_get0_peer_CA_list(s);
1468     int i;
1469
1470     if (sk == NULL || sk_X509_NAME_num(sk) == 0) {
1471         BIO_printf(bio, "---\nNo %s certificate CA names sent\n", cs);
1472         return;
1473     }
1474
1475     BIO_printf(bio, "---\nAcceptable %s certificate CA names\n",cs);
1476     for (i = 0; i < sk_X509_NAME_num(sk); i++) {
1477         X509_NAME_print_ex(bio, sk_X509_NAME_value(sk, i), 0, get_nameopt());
1478         BIO_write(bio, "\n", 1);
1479     }
1480 }