apps/s_cb.c

   1 /*
   2  * Copyright 1995-2019 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 = { -1, 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 < 0 || 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     {"GOST12 Sign", TLS_CT_GOST12_SIGN},
 192     {NULL}
 193 };
 194
 195 static void ssl_print_client_cert_types(BIO *bio, SSL *s)
 196 {
 197     const unsigned char *p;
 198     int i;
 199     int cert_type_num = SSL_get0_certificate_types(s, &p);
 200     if (!cert_type_num)
 201         return;
 202     BIO_puts(bio, "Client Certificate Types: ");
 203     for (i = 0; i < cert_type_num; i++) {
 204         unsigned char cert_type = p[i];
 205         const char *cname = lookup((int)cert_type, cert_type_list, NULL);
 206
 207         if (i)
 208             BIO_puts(bio, ", ");
 209         if (cname != NULL)
 210             BIO_puts(bio, cname);
 211         else
 212             BIO_printf(bio, "UNKNOWN (%d),", cert_type);
 213     }
 214     BIO_puts(bio, "\n");
 215 }
 216
 217 static const char *get_sigtype(int nid)
 218 {
 219     switch (nid) {
 220     case EVP_PKEY_RSA:
 221         return "RSA";
 222
 223     case EVP_PKEY_RSA_PSS:
 224         return "RSA-PSS";
 225
 226     case EVP_PKEY_DSA:
 227         return "DSA";
 228
 229      case EVP_PKEY_EC:
 230         return "ECDSA";
 231
 232      case NID_ED25519:
 233         return "Ed25519";
 234
 235      case NID_ED448:
 236         return "Ed448";
 237
 238      case NID_id_GostR3410_2001:
 239         return "gost2001";
 240
 241      case NID_id_GostR3410_2012_256:
 242         return "gost2012_256";
 243
 244      case NID_id_GostR3410_2012_512:
 245         return "gost2012_512";
 246
 247     default:
 248         return NULL;
 249     }
 250 }
 251
 252 static int do_print_sigalgs(BIO *out, SSL *s, int shared)
 253 {
 254     int i, nsig, client;
 255     client = SSL_is_server(s) ? 0 : 1;
 256     if (shared)
 257         nsig = SSL_get_shared_sigalgs(s, 0, NULL, NULL, NULL, NULL, NULL);
 258     else
 259         nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 260     if (nsig == 0)
 261         return 1;
 262
 263     if (shared)
 264         BIO_puts(out, "Shared ");
 265
 266     if (client)
 267         BIO_puts(out, "Requested ");
 268     BIO_puts(out, "Signature Algorithms: ");
 269     for (i = 0; i < nsig; i++) {
 270         int hash_nid, sign_nid;
 271         unsigned char rhash, rsign;
 272         const char *sstr = NULL;
 273         if (shared)
 274             SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 275                                    &rsign, &rhash);
 276         else
 277             SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL, &rsign, &rhash);
 278         if (i)
 279             BIO_puts(out, ":");
 280         sstr = get_sigtype(sign_nid);
 281         if (sstr)
 282             BIO_printf(out, "%s", sstr);
 283         else
 284             BIO_printf(out, "0x%02X", (int)rsign);
 285         if (hash_nid != NID_undef)
 286             BIO_printf(out, "+%s", OBJ_nid2sn(hash_nid));
 287         else if (sstr == NULL)
 288             BIO_printf(out, "+0x%02X", (int)rhash);
 289     }
 290     BIO_puts(out, "\n");
 291     return 1;
 292 }
 293
 294 int ssl_print_sigalgs(BIO *out, SSL *s)
 295 {
 296     int nid;
 297     if (!SSL_is_server(s))
 298         ssl_print_client_cert_types(out, s);
 299     do_print_sigalgs(out, s, 0);
 300     do_print_sigalgs(out, s, 1);
 301     if (SSL_get_peer_signature_nid(s, &nid) && nid != NID_undef)
 302         BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(nid));
 303     if (SSL_get_peer_signature_type_nid(s, &nid))
 304         BIO_printf(out, "Peer signature type: %s\n", get_sigtype(nid));
 305     return 1;
 306 }
 307
 308 #ifndef OPENSSL_NO_EC
 309 int ssl_print_point_formats(BIO *out, SSL *s)
 310 {
 311     int i, nformats;
 312     const char *pformats;
 313     nformats = SSL_get0_ec_point_formats(s, &pformats);
 314     if (nformats <= 0)
 315         return 1;
 316     BIO_puts(out, "Supported Elliptic Curve Point Formats: ");
 317     for (i = 0; i < nformats; i++, pformats++) {
 318         if (i)
 319             BIO_puts(out, ":");
 320         switch (*pformats) {
 321         case TLSEXT_ECPOINTFORMAT_uncompressed:
 322             BIO_puts(out, "uncompressed");
 323             break;
 324
 325         case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime:
 326             BIO_puts(out, "ansiX962_compressed_prime");
 327             break;
 328
 329         case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2:
 330             BIO_puts(out, "ansiX962_compressed_char2");
 331             break;
 332
 333         default:
 334             BIO_printf(out, "unknown(%d)", (int)*pformats);
 335             break;
 336
 337         }
 338     }
 339     BIO_puts(out, "\n");
 340     return 1;
 341 }
 342
 343 int ssl_print_groups(BIO *out, SSL *s, int noshared)
 344 {
 345     int i, ngroups, *groups, nid;
 346     const char *gname;
 347
 348     ngroups = SSL_get1_groups(s, NULL);
 349     if (ngroups <= 0)
 350         return 1;
 351     groups = app_malloc(ngroups * sizeof(int), "groups to print");
 352     SSL_get1_groups(s, groups);
 353
 354     BIO_puts(out, "Supported Elliptic Groups: ");
 355     for (i = 0; i < ngroups; i++) {
 356         if (i)
 357             BIO_puts(out, ":");
 358         nid = groups[i];
 359         /* If unrecognised print out hex version */
 360         if (nid & TLSEXT_nid_unknown) {
 361             BIO_printf(out, "0x%04X", nid & 0xFFFF);
 362         } else {
 363             /* TODO(TLS1.3): Get group name here */
 364             /* Use NIST name for curve if it exists */
 365             gname = EC_curve_nid2nist(nid);
 366             if (gname == NULL)
 367                 gname = OBJ_nid2sn(nid);
 368             BIO_printf(out, "%s", gname);
 369         }
 370     }
 371     OPENSSL_free(groups);
 372     if (noshared) {
 373         BIO_puts(out, "\n");
 374         return 1;
 375     }
 376     BIO_puts(out, "\nShared Elliptic groups: ");
 377     ngroups = SSL_get_shared_group(s, -1);
 378     for (i = 0; i < ngroups; i++) {
 379         if (i)
 380             BIO_puts(out, ":");
 381         nid = SSL_get_shared_group(s, i);
 382         /* TODO(TLS1.3): Convert for DH groups */
 383         gname = EC_curve_nid2nist(nid);
 384         if (gname == NULL)
 385             gname = OBJ_nid2sn(nid);
 386         BIO_printf(out, "%s", gname);
 387     }
 388     if (ngroups == 0)
 389         BIO_puts(out, "NONE");
 390     BIO_puts(out, "\n");
 391     return 1;
 392 }
 393 #endif
 394
 395 int ssl_print_tmp_key(BIO *out, SSL *s)
 396 {
 397     EVP_PKEY *key;
 398
 399     if (!SSL_get_peer_tmp_key(s, &key))
 400         return 1;
 401     BIO_puts(out, "Server Temp Key: ");
 402     switch (EVP_PKEY_id(key)) {
 403     case EVP_PKEY_RSA:
 404         BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
 405         break;
 406
 407     case EVP_PKEY_DH:
 408         BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
 409         break;
 410 #ifndef OPENSSL_NO_EC
 411     case EVP_PKEY_EC:
 412         {
 413             EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
 414             int nid;
 415             const char *cname;
 416             nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 417             EC_KEY_free(ec);
 418             cname = EC_curve_nid2nist(nid);
 419             if (cname == NULL)
 420                 cname = OBJ_nid2sn(nid);
 421             BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(key));
 422         }
 423     break;
 424 #endif
 425     default:
 426         BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(key)),
 427                    EVP_PKEY_bits(key));
 428     }
 429     EVP_PKEY_free(key);
 430     return 1;
 431 }
 432
 433 long bio_dump_callback(BIO *bio, int cmd, const char *argp,
 434                        int argi, long argl, long ret)
 435 {
 436     BIO *out;
 437
 438     out = (BIO *)BIO_get_callback_arg(bio);
 439     if (out == NULL)
 440         return ret;
 441
 442     if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
 443         BIO_printf(out, "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 444                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 445         BIO_dump(out, argp, (int)ret);
 446         return ret;
 447     } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
 448         BIO_printf(out, "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 449                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 450         BIO_dump(out, argp, (int)ret);
 451     }
 452     return ret;
 453 }
 454
 455 void apps_ssl_info_callback(const SSL *s, int where, int ret)
 456 {
 457     const char *str;
 458     int w;
 459
 460     w = where & ~SSL_ST_MASK;
 461
 462     if (w & SSL_ST_CONNECT)
 463         str = "SSL_connect";
 464     else if (w & SSL_ST_ACCEPT)
 465         str = "SSL_accept";
 466     else
 467         str = "undefined";
 468
 469     if (where & SSL_CB_LOOP) {
 470         BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
 471     } else if (where & SSL_CB_ALERT) {
 472         str = (where & SSL_CB_READ) ? "read" : "write";
 473         BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n",
 474                    str,
 475                    SSL_alert_type_string_long(ret),
 476                    SSL_alert_desc_string_long(ret));
 477     } else if (where & SSL_CB_EXIT) {
 478         if (ret == 0)
 479             BIO_printf(bio_err, "%s:failed in %s\n",
 480                        str, SSL_state_string_long(s));
 481         else if (ret < 0)
 482             BIO_printf(bio_err, "%s:error in %s\n",
 483                        str, SSL_state_string_long(s));
 484     }
 485 }
 486
 487 static STRINT_PAIR ssl_versions[] = {
 488     {"SSL 3.0", SSL3_VERSION},
 489     {"TLS 1.0", TLS1_VERSION},
 490     {"TLS 1.1", TLS1_1_VERSION},
 491     {"TLS 1.2", TLS1_2_VERSION},
 492     {"TLS 1.3", TLS1_3_VERSION},
 493     {"DTLS 1.0", DTLS1_VERSION},
 494     {"DTLS 1.0 (bad)", DTLS1_BAD_VER},
 495     {NULL}
 496 };
 497
 498 static STRINT_PAIR alert_types[] = {
 499     {" close_notify", 0},
 500     {" end_of_early_data", 1},
 501     {" unexpected_message", 10},
 502     {" bad_record_mac", 20},
 503     {" decryption_failed", 21},
 504     {" record_overflow", 22},
 505     {" decompression_failure", 30},
 506     {" handshake_failure", 40},
 507     {" bad_certificate", 42},
 508     {" unsupported_certificate", 43},
 509     {" certificate_revoked", 44},
 510     {" certificate_expired", 45},
 511     {" certificate_unknown", 46},
 512     {" illegal_parameter", 47},
 513     {" unknown_ca", 48},
 514     {" access_denied", 49},
 515     {" decode_error", 50},
 516     {" decrypt_error", 51},
 517     {" export_restriction", 60},
 518     {" protocol_version", 70},
 519     {" insufficient_security", 71},
 520     {" internal_error", 80},
 521     {" inappropriate_fallback", 86},
 522     {" user_canceled", 90},
 523     {" no_renegotiation", 100},
 524     {" missing_extension", 109},
 525     {" unsupported_extension", 110},
 526     {" certificate_unobtainable", 111},
 527     {" unrecognized_name", 112},
 528     {" bad_certificate_status_response", 113},
 529     {" bad_certificate_hash_value", 114},
 530     {" unknown_psk_identity", 115},
 531     {" certificate_required", 116},
 532     {NULL}
 533 };
 534
 535 static STRINT_PAIR handshakes[] = {
 536     {", HelloRequest", SSL3_MT_HELLO_REQUEST},
 537     {", ClientHello", SSL3_MT_CLIENT_HELLO},
 538     {", ServerHello", SSL3_MT_SERVER_HELLO},
 539     {", HelloVerifyRequest", DTLS1_MT_HELLO_VERIFY_REQUEST},
 540     {", NewSessionTicket", SSL3_MT_NEWSESSION_TICKET},
 541     {", EndOfEarlyData", SSL3_MT_END_OF_EARLY_DATA},
 542     {", EncryptedExtensions", SSL3_MT_ENCRYPTED_EXTENSIONS},
 543     {", Certificate", SSL3_MT_CERTIFICATE},
 544     {", ServerKeyExchange", SSL3_MT_SERVER_KEY_EXCHANGE},
 545     {", CertificateRequest", SSL3_MT_CERTIFICATE_REQUEST},
 546     {", ServerHelloDone", SSL3_MT_SERVER_DONE},
 547     {", CertificateVerify", SSL3_MT_CERTIFICATE_VERIFY},
 548     {", ClientKeyExchange", SSL3_MT_CLIENT_KEY_EXCHANGE},
 549     {", Finished", SSL3_MT_FINISHED},
 550     {", CertificateUrl", SSL3_MT_CERTIFICATE_URL},
 551     {", CertificateStatus", SSL3_MT_CERTIFICATE_STATUS},
 552     {", SupplementalData", SSL3_MT_SUPPLEMENTAL_DATA},
 553     {", KeyUpdate", SSL3_MT_KEY_UPDATE},
 554 #ifndef OPENSSL_NO_NEXTPROTONEG
 555     {", NextProto", SSL3_MT_NEXT_PROTO},
 556 #endif
 557     {", MessageHash", SSL3_MT_MESSAGE_HASH},
 558     {NULL}
 559 };
 560
 561 void msg_cb(int write_p, int version, int content_type, const void *buf,
 562             size_t len, SSL *ssl, void *arg)
 563 {
 564     BIO *bio = arg;
 565     const char *str_write_p = write_p ? ">>>" : "<<<";
 566     const char *str_version = lookup(version, ssl_versions, "???");
 567     const char *str_content_type = "", *str_details1 = "", *str_details2 = "";
 568     const unsigned char* bp = buf;
 569
 570     if (version == SSL3_VERSION ||
 571         version == TLS1_VERSION ||
 572         version == TLS1_1_VERSION ||
 573         version == TLS1_2_VERSION ||
 574         version == TLS1_3_VERSION ||
 575         version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
 576         switch (content_type) {
 577         case 20:
 578             str_content_type = ", ChangeCipherSpec";
 579             break;
 580         case 21:
 581             str_content_type = ", Alert";
 582             str_details1 = ", ???";
 583             if (len == 2) {
 584                 switch (bp[0]) {
 585                 case 1:
 586                     str_details1 = ", warning";
 587                     break;
 588                 case 2:
 589                     str_details1 = ", fatal";
 590                     break;
 591                 }
 592                 str_details2 = lookup((int)bp[1], alert_types, " ???");
 593             }
 594             break;
 595         case 22:
 596             str_content_type = ", Handshake";
 597             str_details1 = "???";
 598             if (len > 0)
 599                 str_details1 = lookup((int)bp[0], handshakes, "???");
 600             break;
 601         case 23:
 602             str_content_type = ", ApplicationData";
 603             break;
 604 #ifndef OPENSSL_NO_HEARTBEATS
 605         case 24:
 606             str_details1 = ", Heartbeat";
 607
 608             if (len > 0) {
 609                 switch (bp[0]) {
 610                 case 1:
 611                     str_details1 = ", HeartbeatRequest";
 612                     break;
 613                 case 2:
 614                     str_details1 = ", HeartbeatResponse";
 615                     break;
 616                 }
 617             }
 618             break;
 619 #endif
 620         }
 621     }
 622
 623     BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version,
 624                str_content_type, (unsigned long)len, str_details1,
 625                str_details2);
 626
 627     if (len > 0) {
 628         size_t num, i;
 629
 630         BIO_printf(bio, "   ");
 631         num = len;
 632         for (i = 0; i < num; i++) {
 633             if (i % 16 == 0 && i > 0)
 634                 BIO_printf(bio, "\n   ");
 635             BIO_printf(bio, " %02x", ((const unsigned char *)buf)[i]);
 636         }
 637         if (i < len)
 638             BIO_printf(bio, " ...");
 639         BIO_printf(bio, "\n");
 640     }
 641     (void)BIO_flush(bio);
 642 }
 643
 644 static STRINT_PAIR tlsext_types[] = {
 645     {"server name", TLSEXT_TYPE_server_name},
 646     {"max fragment length", TLSEXT_TYPE_max_fragment_length},
 647     {"client certificate URL", TLSEXT_TYPE_client_certificate_url},
 648     {"trusted CA keys", TLSEXT_TYPE_trusted_ca_keys},
 649     {"truncated HMAC", TLSEXT_TYPE_truncated_hmac},
 650     {"status request", TLSEXT_TYPE_status_request},
 651     {"user mapping", TLSEXT_TYPE_user_mapping},
 652     {"client authz", TLSEXT_TYPE_client_authz},
 653     {"server authz", TLSEXT_TYPE_server_authz},
 654     {"cert type", TLSEXT_TYPE_cert_type},
 655     {"supported_groups", TLSEXT_TYPE_supported_groups},
 656     {"EC point formats", TLSEXT_TYPE_ec_point_formats},
 657     {"SRP", TLSEXT_TYPE_srp},
 658     {"signature algorithms", TLSEXT_TYPE_signature_algorithms},
 659     {"use SRTP", TLSEXT_TYPE_use_srtp},
 660     {"heartbeat", TLSEXT_TYPE_heartbeat},
 661     {"session ticket", TLSEXT_TYPE_session_ticket},
 662     {"renegotiation info", TLSEXT_TYPE_renegotiate},
 663     {"signed certificate timestamps", TLSEXT_TYPE_signed_certificate_timestamp},
 664     {"TLS padding", TLSEXT_TYPE_padding},
 665 #ifdef TLSEXT_TYPE_next_proto_neg
 666     {"next protocol", TLSEXT_TYPE_next_proto_neg},
 667 #endif
 668 #ifdef TLSEXT_TYPE_encrypt_then_mac
 669     {"encrypt-then-mac", TLSEXT_TYPE_encrypt_then_mac},
 670 #endif
 671 #ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
 672     {"application layer protocol negotiation",
 673      TLSEXT_TYPE_application_layer_protocol_negotiation},
 674 #endif
 675 #ifdef TLSEXT_TYPE_extended_master_secret
 676     {"extended master secret", TLSEXT_TYPE_extended_master_secret},
 677 #endif
 678     {"key share", TLSEXT_TYPE_key_share},
 679     {"supported versions", TLSEXT_TYPE_supported_versions},
 680     {"psk", TLSEXT_TYPE_psk},
 681     {"psk kex modes", TLSEXT_TYPE_psk_kex_modes},
 682     {"certificate authorities", TLSEXT_TYPE_certificate_authorities},
 683     {"post handshake auth", TLSEXT_TYPE_post_handshake_auth},
 684     {NULL}
 685 };
 686
 687 /* from rfc8446 4.2.3. + gost (https://tools.ietf.org/id/draft-smyshlyaev-tls12-gost-suites-04.html) */
 688 static STRINT_PAIR signature_tls13_scheme_list[] = {
 689     {"rsa_pkcs1_sha1",         0x0201 /* TLSEXT_SIGALG_rsa_pkcs1_sha1 */},
 690     {"ecdsa_sha1",             0x0203 /* TLSEXT_SIGALG_ecdsa_sha1 */},
 691 /*  {"rsa_pkcs1_sha224",       0x0301    TLSEXT_SIGALG_rsa_pkcs1_sha224}, not in rfc8446 */
 692 /*  {"ecdsa_sha224",           0x0303    TLSEXT_SIGALG_ecdsa_sha224}      not in rfc8446 */
 693     {"rsa_pkcs1_sha256",       0x0401 /* TLSEXT_SIGALG_rsa_pkcs1_sha256 */},
 694     {"ecdsa_secp256r1_sha256", 0x0403 /* TLSEXT_SIGALG_ecdsa_secp256r1_sha256 */},
 695     {"rsa_pkcs1_sha384",       0x0501 /* TLSEXT_SIGALG_rsa_pkcs1_sha384 */},
 696     {"ecdsa_secp384r1_sha384", 0x0503 /* TLSEXT_SIGALG_ecdsa_secp384r1_sha384 */},
 697     {"rsa_pkcs1_sha512",       0x0601 /* TLSEXT_SIGALG_rsa_pkcs1_sha512 */},
 698     {"ecdsa_secp521r1_sha512", 0x0603 /* TLSEXT_SIGALG_ecdsa_secp521r1_sha512 */},
 699     {"rsa_pss_rsae_sha256",    0x0804 /* TLSEXT_SIGALG_rsa_pss_rsae_sha256 */},
 700     {"rsa_pss_rsae_sha384",    0x0805 /* TLSEXT_SIGALG_rsa_pss_rsae_sha384 */},
 701     {"rsa_pss_rsae_sha512",    0x0806 /* TLSEXT_SIGALG_rsa_pss_rsae_sha512 */},
 702     {"ed25519",                0x0807 /* TLSEXT_SIGALG_ed25519 */},
 703     {"ed448",                  0x0808 /* TLSEXT_SIGALG_ed448 */},
 704     {"rsa_pss_pss_sha256",     0x0809 /* TLSEXT_SIGALG_rsa_pss_pss_sha256 */},
 705     {"rsa_pss_pss_sha384",     0x080a /* TLSEXT_SIGALG_rsa_pss_pss_sha384 */},
 706     {"rsa_pss_pss_sha512",     0x080b /* TLSEXT_SIGALG_rsa_pss_pss_sha512 */},
 707     {"gostr34102001",          0xeded /* TLSEXT_SIGALG_gostr34102001_gostr3411 */},
 708     {"gostr34102012_256",      0xeeee /* TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256 */},
 709     {"gostr34102012_512",      0xefef /* TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512 */},
 710     {NULL}
 711 };
 712
 713 /* from rfc5246 7.4.1.4.1. */
 714 static STRINT_PAIR signature_tls12_alg_list[] = {
 715     {"anonymous", TLSEXT_signature_anonymous /* 0 */},
 716     {"RSA",       TLSEXT_signature_rsa       /* 1 */},
 717     {"DSA",       TLSEXT_signature_dsa       /* 2 */},
 718     {"ECDSA",     TLSEXT_signature_ecdsa     /* 3 */},
 719     {NULL}
 720 };
 721
 722 /* from rfc5246 7.4.1.4.1. */
 723 static STRINT_PAIR signature_tls12_hash_list[] = {
 724     {"none",   TLSEXT_hash_none   /* 0 */},
 725     {"MD5",    TLSEXT_hash_md5    /* 1 */},
 726     {"SHA1",   TLSEXT_hash_sha1   /* 2 */},
 727     {"SHA224", TLSEXT_hash_sha224 /* 3 */},
 728     {"SHA256", TLSEXT_hash_sha256 /* 4 */},
 729     {"SHA384", TLSEXT_hash_sha384 /* 5 */},
 730     {"SHA512", TLSEXT_hash_sha512 /* 6 */},
 731     {NULL}
 732 };
 733
 734 void tlsext_cb(SSL *s, int client_server, int type,
 735                const unsigned char *data, int len, void *arg)
 736 {
 737     BIO *bio = arg;
 738     const char *extname = lookup(type, tlsext_types, "unknown");
 739
 740     BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 741                client_server ? "server" : "client", extname, type, len);
 742     BIO_dump(bio, (const char *)data, len);
 743     (void)BIO_flush(bio);
 744 }
 745
 746 #ifndef OPENSSL_NO_SOCK
 747 int generate_cookie_callback(SSL *ssl, unsigned char *cookie,
 748                              unsigned int *cookie_len)
 749 {
 750     unsigned char *buffer;
 751     size_t length = 0;
 752     unsigned short port;
 753     BIO_ADDR *lpeer = NULL, *peer = NULL;
 754
 755     /* Initialize a random secret */
 756     if (!cookie_initialized) {
 757         if (RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH) <= 0) {
 758             BIO_printf(bio_err, "error setting random cookie secret\n");
 759             return 0;
 760         }
 761         cookie_initialized = 1;
 762     }
 763
 764     if (SSL_is_dtls(ssl)) {
 765         lpeer = peer = BIO_ADDR_new();
 766         if (peer == NULL) {
 767             BIO_printf(bio_err, "memory full\n");
 768             return 0;
 769         }
 770
 771         /* Read peer information */
 772         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), peer);
 773     } else {
 774         peer = ourpeer;
 775     }
 776
 777     /* Create buffer with peer's address and port */
 778     if (!BIO_ADDR_rawaddress(peer, NULL, &length)) {
 779         BIO_printf(bio_err, "Failed getting peer address\n");
 780         return 0;
 781     }
 782     OPENSSL_assert(length != 0);
 783     port = BIO_ADDR_rawport(peer);
 784     length += sizeof(port);
 785     buffer = app_malloc(length, "cookie generate buffer");
 786
 787     memcpy(buffer, &port, sizeof(port));
 788     BIO_ADDR_rawaddress(peer, buffer + sizeof(port), NULL);
 789
 790     /* Calculate HMAC of buffer using the secret */
 791     HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 792          buffer, length, cookie, cookie_len);
 793
 794     OPENSSL_free(buffer);
 795     BIO_ADDR_free(lpeer);
 796
 797     return 1;
 798 }
 799
 800 int verify_cookie_callback(SSL *ssl, const unsigned char *cookie,
 801                            unsigned int cookie_len)
 802 {
 803     unsigned char result[EVP_MAX_MD_SIZE];
 804     unsigned int resultlength;
 805
 806     /* Note: we check cookie_initialized because if it's not,
 807      * it cannot be valid */
 808     if (cookie_initialized
 809         && generate_cookie_callback(ssl, result, &resultlength)
 810         && cookie_len == resultlength
 811         && memcmp(result, cookie, resultlength) == 0)
 812         return 1;
 813
 814     return 0;
 815 }
 816
 817 int generate_stateless_cookie_callback(SSL *ssl, unsigned char *cookie,
 818                                        size_t *cookie_len)
 819 {
 820     unsigned int temp;
 821     int res = generate_cookie_callback(ssl, cookie, &temp);
 822     *cookie_len = temp;
 823     return res;
 824 }
 825
 826 int verify_stateless_cookie_callback(SSL *ssl, const unsigned char *cookie,
 827                                      size_t cookie_len)
 828 {
 829     return verify_cookie_callback(ssl, cookie, cookie_len);
 830 }
 831
 832 #endif
 833
 834 /*
 835  * Example of extended certificate handling. Where the standard support of
 836  * one certificate per algorithm is not sufficient an application can decide
 837  * which certificate(s) to use at runtime based on whatever criteria it deems
 838  * appropriate.
 839  */
 840
 841 /* Linked list of certificates, keys and chains */
 842 struct ssl_excert_st {
 843     int certform;
 844     const char *certfile;
 845     int keyform;
 846     const char *keyfile;
 847     const char *chainfile;
 848     X509 *cert;
 849     EVP_PKEY *key;
 850     STACK_OF(X509) *chain;
 851     int build_chain;
 852     struct ssl_excert_st *next, *prev;
 853 };
 854
 855 static STRINT_PAIR chain_flags[] = {
 856     {"Overall Validity", CERT_PKEY_VALID},
 857     {"Sign with EE key", CERT_PKEY_SIGN},
 858     {"EE signature", CERT_PKEY_EE_SIGNATURE},
 859     {"CA signature", CERT_PKEY_CA_SIGNATURE},
 860     {"EE key parameters", CERT_PKEY_EE_PARAM},
 861     {"CA key parameters", CERT_PKEY_CA_PARAM},
 862     {"Explicitly sign with EE key", CERT_PKEY_EXPLICIT_SIGN},
 863     {"Issuer Name", CERT_PKEY_ISSUER_NAME},
 864     {"Certificate Type", CERT_PKEY_CERT_TYPE},
 865     {NULL}
 866 };
 867
 868 static void print_chain_flags(SSL *s, int flags)
 869 {
 870     STRINT_PAIR *pp;
 871
 872     for (pp = chain_flags; pp->name; ++pp)
 873         BIO_printf(bio_err, "\t%s: %s\n",
 874                    pp->name,
 875                    (flags & pp->retval) ? "OK" : "NOT OK");
 876     BIO_printf(bio_err, "\tSuite B: ");
 877     if (SSL_set_cert_flags(s, 0) & SSL_CERT_FLAG_SUITEB_128_LOS)
 878         BIO_puts(bio_err, flags & CERT_PKEY_SUITEB ? "OK\n" : "NOT OK\n");
 879     else
 880         BIO_printf(bio_err, "not tested\n");
 881 }
 882
 883 /*
 884  * Very basic selection callback: just use any certificate chain reported as
 885  * valid. More sophisticated could prioritise according to local policy.
 886  */
 887 static int set_cert_cb(SSL *ssl, void *arg)
 888 {
 889     int i, rv;
 890     SSL_EXCERT *exc = arg;
 891 #ifdef CERT_CB_TEST_RETRY
 892     static int retry_cnt;
 893     if (retry_cnt < 5) {
 894         retry_cnt++;
 895         BIO_printf(bio_err,
 896                    "Certificate callback retry test: count %d\n",
 897                    retry_cnt);
 898         return -1;
 899     }
 900 #endif
 901     SSL_certs_clear(ssl);
 902
 903     if (exc == NULL)
 904         return 1;
 905
 906     /*
 907      * Go to end of list and traverse backwards since we prepend newer
 908      * entries this retains the original order.
 909      */
 910     while (exc->next != NULL)
 911         exc = exc->next;
 912
 913     i = 0;
 914
 915     while (exc != NULL) {
 916         i++;
 917         rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
 918         BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
 919         X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
 920                            get_nameopt());
 921         BIO_puts(bio_err, "\n");
 922         print_chain_flags(ssl, rv);
 923         if (rv & CERT_PKEY_VALID) {
 924             if (!SSL_use_certificate(ssl, exc->cert)
 925                     || !SSL_use_PrivateKey(ssl, exc->key)) {
 926                 return 0;
 927             }
 928             /*
 929              * NB: we wouldn't normally do this as it is not efficient
 930              * building chains on each connection better to cache the chain
 931              * in advance.
 932              */
 933             if (exc->build_chain) {
 934                 if (!SSL_build_cert_chain(ssl, 0))
 935                     return 0;
 936             } else if (exc->chain != NULL) {
 937                 SSL_set1_chain(ssl, exc->chain);
 938             }
 939         }
 940         exc = exc->prev;
 941     }
 942     return 1;
 943 }
 944
 945 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
 946 {
 947     SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
 948 }
 949
 950 static int ssl_excert_prepend(SSL_EXCERT **pexc)
 951 {
 952     SSL_EXCERT *exc = app_malloc(sizeof(*exc), "prepend cert");
 953
 954     memset(exc, 0, sizeof(*exc));
 955
 956     exc->next = *pexc;
 957     *pexc = exc;
 958
 959     if (exc->next) {
 960         exc->certform = exc->next->certform;
 961         exc->keyform = exc->next->keyform;
 962         exc->next->prev = exc;
 963     } else {
 964         exc->certform = FORMAT_PEM;
 965         exc->keyform = FORMAT_PEM;
 966     }
 967     return 1;
 968
 969 }
 970
 971 void ssl_excert_free(SSL_EXCERT *exc)
 972 {
 973     SSL_EXCERT *curr;
 974
 975     if (exc == NULL)
 976         return;
 977     while (exc) {
 978         X509_free(exc->cert);
 979         EVP_PKEY_free(exc->key);
 980         sk_X509_pop_free(exc->chain, X509_free);
 981         curr = exc;
 982         exc = exc->next;
 983         OPENSSL_free(curr);
 984     }
 985 }
 986
 987 int load_excert(SSL_EXCERT **pexc)
 988 {
 989     SSL_EXCERT *exc = *pexc;
 990     if (exc == NULL)
 991         return 1;
 992     /* If nothing in list, free and set to NULL */
 993     if (exc->certfile == NULL && exc->next == NULL) {
 994         ssl_excert_free(exc);
 995         *pexc = NULL;
 996         return 1;
 997     }
 998     for (; exc; exc = exc->next) {
 999         if (exc->certfile == NULL) {
1000             BIO_printf(bio_err, "Missing filename\n");
1001             return 0;
1002         }
1003         exc->cert = load_cert(exc->certfile, exc->certform,
1004                               "Server Certificate");
1005         if (exc->cert == NULL)
1006             return 0;
1007         if (exc->keyfile != NULL) {
1008             exc->key = load_key(exc->keyfile, exc->keyform,
1009                                 0, NULL, NULL, "Server Key");
1010         } else {
1011             exc->key = load_key(exc->certfile, exc->certform,
1012                                 0, NULL, NULL, "Server Key");
1013         }
1014         if (exc->key == NULL)
1015             return 0;
1016         if (exc->chainfile != NULL) {
1017             if (!load_certs(exc->chainfile, &exc->chain, FORMAT_PEM, NULL,
1018                             "Server Chain"))
1019                 return 0;
1020         }
1021     }
1022     return 1;
1023 }
1024
1025 enum range { OPT_X_ENUM };
1026
1027 int args_excert(int opt, SSL_EXCERT **pexc)
1028 {
1029     SSL_EXCERT *exc = *pexc;
1030
1031     assert(opt > OPT_X__FIRST);
1032     assert(opt < OPT_X__LAST);
1033
1034     if (exc == NULL) {
1035         if (!ssl_excert_prepend(&exc)) {
1036             BIO_printf(bio_err, " %s: Error initialising xcert\n",
1037                        opt_getprog());
1038             goto err;
1039         }
1040         *pexc = exc;
1041     }
1042
1043     switch ((enum range)opt) {
1044     case OPT_X__FIRST:
1045     case OPT_X__LAST:
1046         return 0;
1047     case OPT_X_CERT:
1048         if (exc->certfile != NULL && !ssl_excert_prepend(&exc)) {
1049             BIO_printf(bio_err, "%s: Error adding xcert\n", opt_getprog());
1050             goto err;
1051         }
1052         *pexc = exc;
1053         exc->certfile = opt_arg();
1054         break;
1055     case OPT_X_KEY:
1056         if (exc->keyfile != NULL) {
1057             BIO_printf(bio_err, "%s: Key already specified\n", opt_getprog());
1058             goto err;
1059         }
1060         exc->keyfile = opt_arg();
1061         break;
1062     case OPT_X_CHAIN:
1063         if (exc->chainfile != NULL) {
1064             BIO_printf(bio_err, "%s: Chain already specified\n",
1065                        opt_getprog());
1066             goto err;
1067         }
1068         exc->chainfile = opt_arg();
1069         break;
1070     case OPT_X_CHAIN_BUILD:
1071         exc->build_chain = 1;
1072         break;
1073     case OPT_X_CERTFORM:
1074         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->certform))
1075             return 0;
1076         break;
1077     case OPT_X_KEYFORM:
1078         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->keyform))
1079             return 0;
1080         break;
1081     }
1082     return 1;
1083
1084  err:
1085     ERR_print_errors(bio_err);
1086     ssl_excert_free(exc);
1087     *pexc = NULL;
1088     return 0;
1089 }
1090
1091 static void print_raw_cipherlist(SSL *s)
1092 {
1093     const unsigned char *rlist;
1094     static const unsigned char scsv_id[] = { 0, 0xFF };
1095     size_t i, rlistlen, num;
1096     if (!SSL_is_server(s))
1097         return;
1098     num = SSL_get0_raw_cipherlist(s, NULL);
1099     OPENSSL_assert(num == 2);
1100     rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
1101     BIO_puts(bio_err, "Client cipher list: ");
1102     for (i = 0; i < rlistlen; i += num, rlist += num) {
1103         const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
1104         if (i)
1105             BIO_puts(bio_err, ":");
1106         if (c != NULL) {
1107             BIO_puts(bio_err, SSL_CIPHER_get_name(c));
1108         } else if (memcmp(rlist, scsv_id, num) == 0) {
1109             BIO_puts(bio_err, "SCSV");
1110         } else {
1111             size_t j;
1112             BIO_puts(bio_err, "0x");
1113             for (j = 0; j < num; j++)
1114                 BIO_printf(bio_err, "%02X", rlist[j]);
1115         }
1116     }
1117     BIO_puts(bio_err, "\n");
1118 }
1119
1120 /*
1121  * Hex encoder for TLSA RRdata, not ':' delimited.
1122  */
1123 static char *hexencode(const unsigned char *data, size_t len)
1124 {
1125     static const char *hex = "0123456789abcdef";
1126     char *out;
1127     char *cp;
1128     size_t outlen = 2 * len + 1;
1129     int ilen = (int) outlen;
1130
1131     if (outlen < len || ilen < 0 || outlen != (size_t)ilen) {
1132         BIO_printf(bio_err, "%s: %zu-byte buffer too large to hexencode\n",
1133                    opt_getprog(), len);
1134         exit(1);
1135     }
1136     cp = out = app_malloc(ilen, "TLSA hex data buffer");
1137
1138     while (len-- > 0) {
1139         *cp++ = hex[(*data >> 4) & 0x0f];
1140         *cp++ = hex[*data++ & 0x0f];
1141     }
1142     *cp = '\0';
1143     return out;
1144 }
1145
1146 void print_verify_detail(SSL *s, BIO *bio)
1147 {
1148     int mdpth;
1149     EVP_PKEY *mspki;
1150     long verify_err = SSL_get_verify_result(s);
1151
1152     if (verify_err == X509_V_OK) {
1153         const char *peername = SSL_get0_peername(s);
1154
1155         BIO_printf(bio, "Verification: OK\n");
1156         if (peername != NULL)
1157             BIO_printf(bio, "Verified peername: %s\n", peername);
1158     } else {
1159         const char *reason = X509_verify_cert_error_string(verify_err);
1160
1161         BIO_printf(bio, "Verification error: %s\n", reason);
1162     }
1163
1164     if ((mdpth = SSL_get0_dane_authority(s, NULL, &mspki)) >= 0) {
1165         uint8_t usage, selector, mtype;
1166         const unsigned char *data = NULL;
1167         size_t dlen = 0;
1168         char *hexdata;
1169
1170         mdpth = SSL_get0_dane_tlsa(s, &usage, &selector, &mtype, &data, &dlen);
1171
1172         /*
1173          * The TLSA data field can be quite long when it is a certificate,
1174          * public key or even a SHA2-512 digest.  Because the initial octets of
1175          * ASN.1 certificates and public keys contain mostly boilerplate OIDs
1176          * and lengths, we show the last 12 bytes of the data instead, as these
1177          * are more likely to distinguish distinct TLSA records.
1178          */
1179 #define TLSA_TAIL_SIZE 12
1180         if (dlen > TLSA_TAIL_SIZE)
1181             hexdata = hexencode(data + dlen - TLSA_TAIL_SIZE, TLSA_TAIL_SIZE);
1182         else
1183             hexdata = hexencode(data, dlen);
1184         BIO_printf(bio, "DANE TLSA %d %d %d %s%s %s at depth %d\n",
1185                    usage, selector, mtype,
1186                    (dlen > TLSA_TAIL_SIZE) ? "..." : "", hexdata,
1187                    (mspki != NULL) ? "signed the certificate" :
1188                    mdpth ? "matched TA certificate" : "matched EE certificate",
1189                    mdpth);
1190         OPENSSL_free(hexdata);
1191     }
1192 }
1193
1194 void print_ssl_summary(SSL *s)
1195 {
1196     const SSL_CIPHER *c;
1197     X509 *peer;
1198
1199     BIO_printf(bio_err, "Protocol version: %s\n", SSL_get_version(s));
1200     print_raw_cipherlist(s);
1201     c = SSL_get_current_cipher(s);
1202     BIO_printf(bio_err, "Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
1203     do_print_sigalgs(bio_err, s, 0);
1204     peer = SSL_get_peer_certificate(s);
1205     if (peer != NULL) {
1206         int nid;
1207
1208         BIO_puts(bio_err, "Peer certificate: ");
1209         X509_NAME_print_ex(bio_err, X509_get_subject_name(peer),
1210                            0, get_nameopt());
1211         BIO_puts(bio_err, "\n");
1212         if (SSL_get_peer_signature_nid(s, &nid))
1213             BIO_printf(bio_err, "Hash used: %s\n", OBJ_nid2sn(nid));
1214         if (SSL_get_peer_signature_type_nid(s, &nid))
1215             BIO_printf(bio_err, "Signature type: %s\n", get_sigtype(nid));
1216         print_verify_detail(s, bio_err);
1217     } else {
1218         BIO_puts(bio_err, "No peer certificate\n");
1219     }
1220     X509_free(peer);
1221 #ifndef OPENSSL_NO_EC
1222     ssl_print_point_formats(bio_err, s);
1223     if (SSL_is_server(s))
1224         ssl_print_groups(bio_err, s, 1);
1225     else
1226         ssl_print_tmp_key(bio_err, s);
1227 #else
1228     if (!SSL_is_server(s))
1229         ssl_print_tmp_key(bio_err, s);
1230 #endif
1231 }
1232
1233 int config_ctx(SSL_CONF_CTX *cctx, STACK_OF(OPENSSL_STRING) *str,
1234                SSL_CTX *ctx)
1235 {
1236     int i;
1237
1238     SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
1239     for (i = 0; i < sk_OPENSSL_STRING_num(str); i += 2) {
1240         const char *flag = sk_OPENSSL_STRING_value(str, i);
1241         const char *arg = sk_OPENSSL_STRING_value(str, i + 1);
1242         if (SSL_CONF_cmd(cctx, flag, arg) <= 0) {
1243             if (arg != NULL)
1244                 BIO_printf(bio_err, "Error with command: \"%s %s\"\n",
1245                            flag, arg);
1246             else
1247                 BIO_printf(bio_err, "Error with command: \"%s\"\n", flag);
1248             ERR_print_errors(bio_err);
1249             return 0;
1250         }
1251     }
1252     if (!SSL_CONF_CTX_finish(cctx)) {
1253         BIO_puts(bio_err, "Error finishing context\n");
1254         ERR_print_errors(bio_err);
1255         return 0;
1256     }
1257     return 1;
1258 }
1259
1260 static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
1261 {
1262     X509_CRL *crl;
1263     int i;
1264     for (i = 0; i < sk_X509_CRL_num(crls); i++) {
1265         crl = sk_X509_CRL_value(crls, i);
1266         X509_STORE_add_crl(st, crl);
1267     }
1268     return 1;
1269 }
1270
1271 int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls, int crl_download)
1272 {
1273     X509_STORE *st;
1274     st = SSL_CTX_get_cert_store(ctx);
1275     add_crls_store(st, crls);
1276     if (crl_download)
1277         store_setup_crl_download(st);
1278     return 1;
1279 }
1280
1281 int ssl_load_stores(SSL_CTX *ctx,
1282                     const char *vfyCApath, const char *vfyCAfile,
1283                     const char *chCApath, const char *chCAfile,
1284                     STACK_OF(X509_CRL) *crls, int crl_download)
1285 {
1286     X509_STORE *vfy = NULL, *ch = NULL;
1287     int rv = 0;
1288     if (vfyCApath != NULL || vfyCAfile != NULL) {
1289         vfy = X509_STORE_new();
1290         if (vfy == NULL)
1291             goto err;
1292         if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
1293             goto err;
1294         add_crls_store(vfy, crls);
1295         SSL_CTX_set1_verify_cert_store(ctx, vfy);
1296         if (crl_download)
1297             store_setup_crl_download(vfy);
1298     }
1299     if (chCApath != NULL || chCAfile != NULL) {
1300         ch = X509_STORE_new();
1301         if (ch == NULL)
1302             goto err;
1303         if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
1304             goto err;
1305         SSL_CTX_set1_chain_cert_store(ctx, ch);
1306     }
1307     rv = 1;
1308  err:
1309     X509_STORE_free(vfy);
1310     X509_STORE_free(ch);
1311     return rv;
1312 }
1313
1314 /* Verbose print out of security callback */
1315
1316 typedef struct {
1317     BIO *out;
1318     int verbose;
1319     int (*old_cb) (const SSL *s, const SSL_CTX *ctx, int op, int bits, int nid,
1320                    void *other, void *ex);
1321 } security_debug_ex;
1322
1323 static STRINT_PAIR callback_types[] = {
1324     {"Supported Ciphersuite", SSL_SECOP_CIPHER_SUPPORTED},
1325     {"Shared Ciphersuite", SSL_SECOP_CIPHER_SHARED},
1326     {"Check Ciphersuite", SSL_SECOP_CIPHER_CHECK},
1327 #ifndef OPENSSL_NO_DH
1328     {"Temp DH key bits", SSL_SECOP_TMP_DH},
1329 #endif
1330     {"Supported Curve", SSL_SECOP_CURVE_SUPPORTED},
1331     {"Shared Curve", SSL_SECOP_CURVE_SHARED},
1332     {"Check Curve", SSL_SECOP_CURVE_CHECK},
1333     {"Supported Signature Algorithm", SSL_SECOP_SIGALG_SUPPORTED},
1334     {"Shared Signature Algorithm", SSL_SECOP_SIGALG_SHARED},
1335     {"Check Signature Algorithm", SSL_SECOP_SIGALG_CHECK},
1336     {"Signature Algorithm mask", SSL_SECOP_SIGALG_MASK},
1337     {"Certificate chain EE key", SSL_SECOP_EE_KEY},
1338     {"Certificate chain CA key", SSL_SECOP_CA_KEY},
1339     {"Peer Chain EE key", SSL_SECOP_PEER_EE_KEY},
1340     {"Peer Chain CA key", SSL_SECOP_PEER_CA_KEY},
1341     {"Certificate chain CA digest", SSL_SECOP_CA_MD},
1342     {"Peer chain CA digest", SSL_SECOP_PEER_CA_MD},
1343     {"SSL compression", SSL_SECOP_COMPRESSION},
1344     {"Session ticket", SSL_SECOP_TICKET},
1345     {NULL}
1346 };
1347
1348 static int security_callback_debug(const SSL *s, const SSL_CTX *ctx,
1349                                    int op, int bits, int nid,
1350                                    void *other, void *ex)
1351 {
1352     security_debug_ex *sdb = ex;
1353     int rv, show_bits = 1, cert_md = 0;
1354     const char *nm;
1355     int show_nm;
1356     rv = sdb->old_cb(s, ctx, op, bits, nid, other, ex);
1357     if (rv == 1 && sdb->verbose < 2)
1358         return 1;
1359     BIO_puts(sdb->out, "Security callback: ");
1360
1361     nm = lookup(op, callback_types, NULL);
1362     show_nm = nm != NULL;
1363     switch (op) {
1364     case SSL_SECOP_TICKET:
1365     case SSL_SECOP_COMPRESSION:
1366         show_bits = 0;
1367         show_nm = 0;
1368         break;
1369     case SSL_SECOP_VERSION:
1370         BIO_printf(sdb->out, "Version=%s", lookup(nid, ssl_versions, "???"));
1371         show_bits = 0;
1372         show_nm = 0;
1373         break;
1374     case SSL_SECOP_CA_MD:
1375     case SSL_SECOP_PEER_CA_MD:
1376         cert_md = 1;
1377         break;
1378     case SSL_SECOP_SIGALG_SUPPORTED:
1379     case SSL_SECOP_SIGALG_SHARED:
1380     case SSL_SECOP_SIGALG_CHECK:
1381     case SSL_SECOP_SIGALG_MASK:
1382         show_nm = 0;
1383         break;
1384     }
1385     if (show_nm)
1386         BIO_printf(sdb->out, "%s=", nm);
1387
1388     switch (op & SSL_SECOP_OTHER_TYPE) {
1389
1390     case SSL_SECOP_OTHER_CIPHER:
1391         BIO_puts(sdb->out, SSL_CIPHER_get_name(other));
1392         break;
1393
1394 #ifndef OPENSSL_NO_EC
1395     case SSL_SECOP_OTHER_CURVE:
1396         {
1397             const char *cname;
1398             cname = EC_curve_nid2nist(nid);
1399             if (cname == NULL)
1400                 cname = OBJ_nid2sn(nid);
1401             BIO_puts(sdb->out, cname);
1402         }
1403         break;
1404 #endif
1405 #ifndef OPENSSL_NO_DH
1406     case SSL_SECOP_OTHER_DH:
1407         {
1408             DH *dh = other;
1409             BIO_printf(sdb->out, "%d", DH_bits(dh));
1410             break;
1411         }
1412 #endif
1413     case SSL_SECOP_OTHER_CERT:
1414         {
1415             if (cert_md) {
1416                 int sig_nid = X509_get_signature_nid(other);
1417                 BIO_puts(sdb->out, OBJ_nid2sn(sig_nid));
1418             } else {
1419                 EVP_PKEY *pkey = X509_get0_pubkey(other);
1420                 const char *algname = "";
1421                 EVP_PKEY_asn1_get0_info(NULL, NULL, NULL, NULL,
1422                                         &algname, EVP_PKEY_get0_asn1(pkey));
1423                 BIO_printf(sdb->out, "%s, bits=%d",
1424                            algname, EVP_PKEY_bits(pkey));
1425             }
1426             break;
1427         }
1428     case SSL_SECOP_OTHER_SIGALG:
1429         {
1430             const unsigned char *salg = other;
1431             const char *sname = NULL;
1432             int raw_sig_code = (salg[0] << 8) + salg[1]; /* always big endian (msb, lsb) */
1433                 /* raw_sig_code: signature_scheme from tls1.3, or signature_and_hash from tls1.2 */
1434
1435             if (nm != NULL)
1436                 BIO_printf(sdb->out, "%s", nm);
1437             else
1438                 BIO_printf(sdb->out, "s_cb.c:security_callback_debug op=0x%x", op);
1439
1440             sname = lookup(raw_sig_code, signature_tls13_scheme_list, NULL);
1441             if (sname != NULL) {
1442                 BIO_printf(sdb->out, " scheme=%s", sname);
1443             } else {
1444                 int alg_code = salg[1];
1445                 int hash_code = salg[0];
1446                 const char *alg_str = lookup(alg_code, signature_tls12_alg_list, NULL);
1447                 const char *hash_str = lookup(hash_code, signature_tls12_hash_list, NULL);
1448
1449                 if (alg_str != NULL && hash_str != NULL)
1450                     BIO_printf(sdb->out, " digest=%s, algorithm=%s", hash_str, alg_str);
1451                 else
1452                     BIO_printf(sdb->out, " scheme=unknown(0x%04x)", raw_sig_code);
1453             }
1454         }
1455
1456     }
1457
1458     if (show_bits)
1459         BIO_printf(sdb->out, ", security bits=%d", bits);
1460     BIO_printf(sdb->out, ": %s\n", rv ? "yes" : "no");
1461     return rv;
1462 }
1463
1464 void ssl_ctx_security_debug(SSL_CTX *ctx, int verbose)
1465 {
1466     static security_debug_ex sdb;
1467
1468     sdb.out = bio_err;
1469     sdb.verbose = verbose;
1470     sdb.old_cb = SSL_CTX_get_security_callback(ctx);
1471     SSL_CTX_set_security_callback(ctx, security_callback_debug);
1472     SSL_CTX_set0_security_ex_data(ctx, &sdb);
1473 }
1474
1475 static void keylog_callback(const SSL *ssl, const char *line)
1476 {
1477     if (bio_keylog == NULL) {
1478         BIO_printf(bio_err, "Keylog callback is invoked without valid file!\n");
1479         return;
1480     }
1481
1482     /*
1483      * There might be concurrent writers to the keylog file, so we must ensure
1484      * that the given line is written at once.
1485      */
1486     BIO_printf(bio_keylog, "%s\n", line);
1487     (void)BIO_flush(bio_keylog);
1488 }
1489
1490 int set_keylog_file(SSL_CTX *ctx, const char *keylog_file)
1491 {
1492     /* Close any open files */
1493     BIO_free_all(bio_keylog);
1494     bio_keylog = NULL;
1495
1496     if (ctx == NULL || keylog_file == NULL) {
1497         /* Keylogging is disabled, OK. */
1498         return 0;
1499     }
1500
1501     /*
1502      * Append rather than write in order to allow concurrent modification.
1503      * Furthermore, this preserves existing keylog files which is useful when
1504      * the tool is run multiple times.
1505      */
1506     bio_keylog = BIO_new_file(keylog_file, "a");
1507     if (bio_keylog == NULL) {
1508         BIO_printf(bio_err, "Error writing keylog file %s\n", keylog_file);
1509         return 1;
1510     }
1511
1512     /* Write a header for seekable, empty files (this excludes pipes). */
1513     if (BIO_tell(bio_keylog) == 0) {
1514         BIO_puts(bio_keylog,
1515                  "# SSL/TLS secrets log file, generated by OpenSSL\n");
1516         (void)BIO_flush(bio_keylog);
1517     }
1518     SSL_CTX_set_keylog_callback(ctx, keylog_callback);
1519     return 0;
1520 }
1521
1522 void print_ca_names(BIO *bio, SSL *s)
1523 {
1524     const char *cs = SSL_is_server(s) ? "server" : "client";
1525     const STACK_OF(X509_NAME) *sk = SSL_get0_peer_CA_list(s);
1526     int i;
1527
1528     if (sk == NULL || sk_X509_NAME_num(sk) == 0) {
1529         if (!SSL_is_server(s))
1530             BIO_printf(bio, "---\nNo %s certificate CA names sent\n", cs);
1531         return;
1532     }
1533
1534     BIO_printf(bio, "---\nAcceptable %s certificate CA names\n",cs);
1535     for (i = 0; i < sk_X509_NAME_num(sk); i++) {
1536         X509_NAME_print_ex(bio, sk_X509_NAME_value(sk, i), 0, get_nameopt());
1537         BIO_write(bio, "\n", 1);
1538     }
1539 }