apps/s_cb.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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     {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
 398     if (!SSL_get_peer_tmp_key(s, &key))
 399         return 1;
 400     BIO_puts(out, "Server Temp Key: ");
 401     switch (EVP_PKEY_id(key)) {
 402     case EVP_PKEY_RSA:
 403         BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
 404         break;
 405
 406     case EVP_PKEY_DH:
 407         BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
 408         break;
 409 #ifndef OPENSSL_NO_EC
 410     case EVP_PKEY_EC:
 411         {
 412             EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
 413             int nid;
 414             const char *cname;
 415             nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 416             EC_KEY_free(ec);
 417             cname = EC_curve_nid2nist(nid);
 418             if (cname == NULL)
 419                 cname = OBJ_nid2sn(nid);
 420             BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(key));
 421         }
 422     break;
 423 #endif
 424     default:
 425         BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(key)),
 426                    EVP_PKEY_bits(key));
 427     }
 428     EVP_PKEY_free(key);
 429     return 1;
 430 }
 431
 432 long bio_dump_callback(BIO *bio, int cmd, const char *argp,
 433                        int argi, long argl, long ret)
 434 {
 435     BIO *out;
 436
 437     out = (BIO *)BIO_get_callback_arg(bio);
 438     if (out == NULL)
 439         return ret;
 440
 441     if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
 442         BIO_printf(out, "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 443                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 444         BIO_dump(out, argp, (int)ret);
 445         return ret;
 446     } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
 447         BIO_printf(out, "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 448                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 449         BIO_dump(out, argp, (int)ret);
 450     }
 451     return ret;
 452 }
 453
 454 void apps_ssl_info_callback(const SSL *s, int where, int ret)
 455 {
 456     const char *str;
 457     int w;
 458
 459     w = where & ~SSL_ST_MASK;
 460
 461     if (w & SSL_ST_CONNECT)
 462         str = "SSL_connect";
 463     else if (w & SSL_ST_ACCEPT)
 464         str = "SSL_accept";
 465     else
 466         str = "undefined";
 467
 468     if (where & SSL_CB_LOOP) {
 469         BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
 470     } else if (where & SSL_CB_ALERT) {
 471         str = (where & SSL_CB_READ) ? "read" : "write";
 472         BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n",
 473                    str,
 474                    SSL_alert_type_string_long(ret),
 475                    SSL_alert_desc_string_long(ret));
 476     } else if (where & SSL_CB_EXIT) {
 477         if (ret == 0)
 478             BIO_printf(bio_err, "%s:failed in %s\n",
 479                        str, SSL_state_string_long(s));
 480         else if (ret < 0)
 481             BIO_printf(bio_err, "%s:error in %s\n",
 482                        str, SSL_state_string_long(s));
 483     }
 484 }
 485
 486 static STRINT_PAIR ssl_versions[] = {
 487     {"SSL 3.0", SSL3_VERSION},
 488     {"TLS 1.0", TLS1_VERSION},
 489     {"TLS 1.1", TLS1_1_VERSION},
 490     {"TLS 1.2", TLS1_2_VERSION},
 491     {"TLS 1.3", TLS1_3_VERSION},
 492     {"DTLS 1.0", DTLS1_VERSION},
 493     {"DTLS 1.0 (bad)", DTLS1_BAD_VER},
 494     {NULL}
 495 };
 496
 497 static STRINT_PAIR alert_types[] = {
 498     {" close_notify", 0},
 499     {" end_of_early_data", 1},
 500     {" unexpected_message", 10},
 501     {" bad_record_mac", 20},
 502     {" decryption_failed", 21},
 503     {" record_overflow", 22},
 504     {" decompression_failure", 30},
 505     {" handshake_failure", 40},
 506     {" bad_certificate", 42},
 507     {" unsupported_certificate", 43},
 508     {" certificate_revoked", 44},
 509     {" certificate_expired", 45},
 510     {" certificate_unknown", 46},
 511     {" illegal_parameter", 47},
 512     {" unknown_ca", 48},
 513     {" access_denied", 49},
 514     {" decode_error", 50},
 515     {" decrypt_error", 51},
 516     {" export_restriction", 60},
 517     {" protocol_version", 70},
 518     {" insufficient_security", 71},
 519     {" internal_error", 80},
 520     {" inappropriate_fallback", 86},
 521     {" user_canceled", 90},
 522     {" no_renegotiation", 100},
 523     {" missing_extension", 109},
 524     {" unsupported_extension", 110},
 525     {" certificate_unobtainable", 111},
 526     {" unrecognized_name", 112},
 527     {" bad_certificate_status_response", 113},
 528     {" bad_certificate_hash_value", 114},
 529     {" unknown_psk_identity", 115},
 530     {" certificate_required", 116},
 531     {NULL}
 532 };
 533
 534 static STRINT_PAIR handshakes[] = {
 535     {", HelloRequest", SSL3_MT_HELLO_REQUEST},
 536     {", ClientHello", SSL3_MT_CLIENT_HELLO},
 537     {", ServerHello", SSL3_MT_SERVER_HELLO},
 538     {", HelloVerifyRequest", DTLS1_MT_HELLO_VERIFY_REQUEST},
 539     {", NewSessionTicket", SSL3_MT_NEWSESSION_TICKET},
 540     {", EndOfEarlyData", SSL3_MT_END_OF_EARLY_DATA},
 541     {", EncryptedExtensions", SSL3_MT_ENCRYPTED_EXTENSIONS},
 542     {", Certificate", SSL3_MT_CERTIFICATE},
 543     {", ServerKeyExchange", SSL3_MT_SERVER_KEY_EXCHANGE},
 544     {", CertificateRequest", SSL3_MT_CERTIFICATE_REQUEST},
 545     {", ServerHelloDone", SSL3_MT_SERVER_DONE},
 546     {", CertificateVerify", SSL3_MT_CERTIFICATE_VERIFY},
 547     {", ClientKeyExchange", SSL3_MT_CLIENT_KEY_EXCHANGE},
 548     {", Finished", SSL3_MT_FINISHED},
 549     {", CertificateUrl", SSL3_MT_CERTIFICATE_URL},
 550     {", CertificateStatus", SSL3_MT_CERTIFICATE_STATUS},
 551     {", SupplementalData", SSL3_MT_SUPPLEMENTAL_DATA},
 552     {", KeyUpdate", SSL3_MT_KEY_UPDATE},
 553 #ifndef OPENSSL_NO_NEXTPROTONEG
 554     {", NextProto", SSL3_MT_NEXT_PROTO},
 555 #endif
 556     {", MessageHash", SSL3_MT_MESSAGE_HASH},
 557     {NULL}
 558 };
 559
 560 void msg_cb(int write_p, int version, int content_type, const void *buf,
 561             size_t len, SSL *ssl, void *arg)
 562 {
 563     BIO *bio = arg;
 564     const char *str_write_p = write_p ? ">>>" : "<<<";
 565     const char *str_version = lookup(version, ssl_versions, "???");
 566     const char *str_content_type = "", *str_details1 = "", *str_details2 = "";
 567     const unsigned char* bp = buf;
 568
 569     if (version == SSL3_VERSION ||
 570         version == TLS1_VERSION ||
 571         version == TLS1_1_VERSION ||
 572         version == TLS1_2_VERSION ||
 573         version == TLS1_3_VERSION ||
 574         version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
 575         switch (content_type) {
 576         case 20:
 577             str_content_type = ", ChangeCipherSpec";
 578             break;
 579         case 21:
 580             str_content_type = ", Alert";
 581             str_details1 = ", ???";
 582             if (len == 2) {
 583                 switch (bp[0]) {
 584                 case 1:
 585                     str_details1 = ", warning";
 586                     break;
 587                 case 2:
 588                     str_details1 = ", fatal";
 589                     break;
 590                 }
 591                 str_details2 = lookup((int)bp[1], alert_types, " ???");
 592             }
 593             break;
 594         case 22:
 595             str_content_type = ", Handshake";
 596             str_details1 = "???";
 597             if (len > 0)
 598                 str_details1 = lookup((int)bp[0], handshakes, "???");
 599             break;
 600         case 23:
 601             str_content_type = ", ApplicationData";
 602             break;
 603 #ifndef OPENSSL_NO_HEARTBEATS
 604         case 24:
 605             str_details1 = ", Heartbeat";
 606
 607             if (len > 0) {
 608                 switch (bp[0]) {
 609                 case 1:
 610                     str_details1 = ", HeartbeatRequest";
 611                     break;
 612                 case 2:
 613                     str_details1 = ", HeartbeatResponse";
 614                     break;
 615                 }
 616             }
 617             break;
 618 #endif
 619         }
 620     }
 621
 622     BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version,
 623                str_content_type, (unsigned long)len, str_details1,
 624                str_details2);
 625
 626     if (len > 0) {
 627         size_t num, i;
 628
 629         BIO_printf(bio, "   ");
 630         num = len;
 631         for (i = 0; i < num; i++) {
 632             if (i % 16 == 0 && i > 0)
 633                 BIO_printf(bio, "\n   ");
 634             BIO_printf(bio, " %02x", ((const unsigned char *)buf)[i]);
 635         }
 636         if (i < len)
 637             BIO_printf(bio, " ...");
 638         BIO_printf(bio, "\n");
 639     }
 640     (void)BIO_flush(bio);
 641 }
 642
 643 static STRINT_PAIR tlsext_types[] = {
 644     {"server name", TLSEXT_TYPE_server_name},
 645     {"max fragment length", TLSEXT_TYPE_max_fragment_length},
 646     {"client certificate URL", TLSEXT_TYPE_client_certificate_url},
 647     {"trusted CA keys", TLSEXT_TYPE_trusted_ca_keys},
 648     {"truncated HMAC", TLSEXT_TYPE_truncated_hmac},
 649     {"status request", TLSEXT_TYPE_status_request},
 650     {"user mapping", TLSEXT_TYPE_user_mapping},
 651     {"client authz", TLSEXT_TYPE_client_authz},
 652     {"server authz", TLSEXT_TYPE_server_authz},
 653     {"cert type", TLSEXT_TYPE_cert_type},
 654     {"supported_groups", TLSEXT_TYPE_supported_groups},
 655     {"EC point formats", TLSEXT_TYPE_ec_point_formats},
 656     {"SRP", TLSEXT_TYPE_srp},
 657     {"signature algorithms", TLSEXT_TYPE_signature_algorithms},
 658     {"use SRTP", TLSEXT_TYPE_use_srtp},
 659     {"heartbeat", TLSEXT_TYPE_heartbeat},
 660     {"session ticket", TLSEXT_TYPE_session_ticket},
 661     {"renegotiation info", TLSEXT_TYPE_renegotiate},
 662     {"signed certificate timestamps", TLSEXT_TYPE_signed_certificate_timestamp},
 663     {"TLS padding", TLSEXT_TYPE_padding},
 664 #ifdef TLSEXT_TYPE_next_proto_neg
 665     {"next protocol", TLSEXT_TYPE_next_proto_neg},
 666 #endif
 667 #ifdef TLSEXT_TYPE_encrypt_then_mac
 668     {"encrypt-then-mac", TLSEXT_TYPE_encrypt_then_mac},
 669 #endif
 670 #ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
 671     {"application layer protocol negotiation",
 672      TLSEXT_TYPE_application_layer_protocol_negotiation},
 673 #endif
 674 #ifdef TLSEXT_TYPE_extended_master_secret
 675     {"extended master secret", TLSEXT_TYPE_extended_master_secret},
 676 #endif
 677     {"key share", TLSEXT_TYPE_key_share},
 678     {"supported versions", TLSEXT_TYPE_supported_versions},
 679     {"psk", TLSEXT_TYPE_psk},
 680     {"psk kex modes", TLSEXT_TYPE_psk_kex_modes},
 681     {"certificate authorities", TLSEXT_TYPE_certificate_authorities},
 682     {"post handshake auth", TLSEXT_TYPE_post_handshake_auth},
 683     {NULL}
 684 };
 685
 686 /* from rfc8446 4.2.3. + gost (https://tools.ietf.org/id/draft-smyshlyaev-tls12-gost-suites-04.html) */
 687 static STRINT_PAIR signature_tls13_scheme_list[] = {
 688     {"rsa_pkcs1_sha1",         0x0201 /* TLSEXT_SIGALG_rsa_pkcs1_sha1 */},
 689     {"ecdsa_sha1",             0x0203 /* TLSEXT_SIGALG_ecdsa_sha1 */},
 690 /*  {"rsa_pkcs1_sha224",       0x0301    TLSEXT_SIGALG_rsa_pkcs1_sha224}, not in rfc8446 */
 691 /*  {"ecdsa_sha224",           0x0303    TLSEXT_SIGALG_ecdsa_sha224}      not in rfc8446 */
 692     {"rsa_pkcs1_sha256",       0x0401 /* TLSEXT_SIGALG_rsa_pkcs1_sha256 */},
 693     {"ecdsa_secp256r1_sha256", 0x0403 /* TLSEXT_SIGALG_ecdsa_secp256r1_sha256 */},
 694     {"rsa_pkcs1_sha384",       0x0501 /* TLSEXT_SIGALG_rsa_pkcs1_sha384 */},
 695     {"ecdsa_secp384r1_sha384", 0x0503 /* TLSEXT_SIGALG_ecdsa_secp384r1_sha384 */},
 696     {"rsa_pkcs1_sha512",       0x0601 /* TLSEXT_SIGALG_rsa_pkcs1_sha512 */},
 697     {"ecdsa_secp521r1_sha512", 0x0603 /* TLSEXT_SIGALG_ecdsa_secp521r1_sha512 */},
 698     {"rsa_pss_rsae_sha256",    0x0804 /* TLSEXT_SIGALG_rsa_pss_rsae_sha256 */},
 699     {"rsa_pss_rsae_sha384",    0x0805 /* TLSEXT_SIGALG_rsa_pss_rsae_sha384 */},
 700     {"rsa_pss_rsae_sha512",    0x0806 /* TLSEXT_SIGALG_rsa_pss_rsae_sha512 */},
 701     {"ed25519",                0x0807 /* TLSEXT_SIGALG_ed25519 */},
 702     {"ed448",                  0x0808 /* TLSEXT_SIGALG_ed448 */},
 703     {"rsa_pss_pss_sha256",     0x0809 /* TLSEXT_SIGALG_rsa_pss_pss_sha256 */},
 704     {"rsa_pss_pss_sha384",     0x080a /* TLSEXT_SIGALG_rsa_pss_pss_sha384 */},
 705     {"rsa_pss_pss_sha512",     0x080b /* TLSEXT_SIGALG_rsa_pss_pss_sha512 */},
 706     {"gostr34102001",          0xeded /* TLSEXT_SIGALG_gostr34102001_gostr3411 */},
 707     {"gostr34102012_256",      0xeeee /* TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256 */},
 708     {"gostr34102012_512",      0xefef /* TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512 */},
 709     {NULL}
 710 };
 711
 712 /* from rfc5246 7.4.1.4.1. */
 713 static STRINT_PAIR signature_tls12_alg_list[] = {
 714     {"anonymous", TLSEXT_signature_anonymous /* 0 */},
 715     {"RSA",       TLSEXT_signature_rsa       /* 1 */},
 716     {"DSA",       TLSEXT_signature_dsa       /* 2 */},
 717     {"ECDSA",     TLSEXT_signature_ecdsa     /* 3 */},
 718     {NULL}
 719 };
 720
 721 /* from rfc5246 7.4.1.4.1. */
 722 static STRINT_PAIR signature_tls12_hash_list[] = {
 723     {"none",   TLSEXT_hash_none   /* 0 */},
 724     {"MD5",    TLSEXT_hash_md5    /* 1 */},
 725     {"SHA1",   TLSEXT_hash_sha1   /* 2 */},
 726     {"SHA224", TLSEXT_hash_sha224 /* 3 */},
 727     {"SHA256", TLSEXT_hash_sha256 /* 4 */},
 728     {"SHA384", TLSEXT_hash_sha384 /* 5 */},
 729     {"SHA512", TLSEXT_hash_sha512 /* 6 */},
 730     {NULL}
 731 };
 732
 733 void tlsext_cb(SSL *s, int client_server, int type,
 734                const unsigned char *data, int len, void *arg)
 735 {
 736     BIO *bio = arg;
 737     const char *extname = lookup(type, tlsext_types, "unknown");
 738
 739     BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 740                client_server ? "server" : "client", extname, type, len);
 741     BIO_dump(bio, (const char *)data, len);
 742     (void)BIO_flush(bio);
 743 }
 744
 745 #ifndef OPENSSL_NO_SOCK
 746 int generate_cookie_callback(SSL *ssl, unsigned char *cookie,
 747                              unsigned int *cookie_len)
 748 {
 749     unsigned char *buffer;
 750     size_t length = 0;
 751     unsigned short port;
 752     BIO_ADDR *lpeer = NULL, *peer = NULL;
 753
 754     /* Initialize a random secret */
 755     if (!cookie_initialized) {
 756         if (RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH) <= 0) {
 757             BIO_printf(bio_err, "error setting random cookie secret\n");
 758             return 0;
 759         }
 760         cookie_initialized = 1;
 761     }
 762
 763     if (SSL_is_dtls(ssl)) {
 764         lpeer = peer = BIO_ADDR_new();
 765         if (peer == NULL) {
 766             BIO_printf(bio_err, "memory full\n");
 767             return 0;
 768         }
 769
 770         /* Read peer information */
 771         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), peer);
 772     } else {
 773         peer = ourpeer;
 774     }
 775
 776     /* Create buffer with peer's address and port */
 777     if (!BIO_ADDR_rawaddress(peer, NULL, &length)) {
 778         BIO_printf(bio_err, "Failed getting peer address\n");
 779         return 0;
 780     }
 781     OPENSSL_assert(length != 0);
 782     port = BIO_ADDR_rawport(peer);
 783     length += sizeof(port);
 784     buffer = app_malloc(length, "cookie generate buffer");
 785
 786     memcpy(buffer, &port, sizeof(port));
 787     BIO_ADDR_rawaddress(peer, buffer + sizeof(port), NULL);
 788
 789     /* Calculate HMAC of buffer using the secret */
 790     HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 791          buffer, length, cookie, cookie_len);
 792
 793     OPENSSL_free(buffer);
 794     BIO_ADDR_free(lpeer);
 795
 796     return 1;
 797 }
 798
 799 int verify_cookie_callback(SSL *ssl, const unsigned char *cookie,
 800                            unsigned int cookie_len)
 801 {
 802     unsigned char result[EVP_MAX_MD_SIZE];
 803     unsigned int resultlength;
 804
 805     /* Note: we check cookie_initialized because if it's not,
 806      * it cannot be valid */
 807     if (cookie_initialized
 808         && generate_cookie_callback(ssl, result, &resultlength)
 809         && cookie_len == resultlength
 810         && memcmp(result, cookie, resultlength) == 0)
 811         return 1;
 812
 813     return 0;
 814 }
 815
 816 int generate_stateless_cookie_callback(SSL *ssl, unsigned char *cookie,
 817                                        size_t *cookie_len)
 818 {
 819     unsigned int temp;
 820     int res = generate_cookie_callback(ssl, cookie, &temp);
 821     *cookie_len = temp;
 822     return res;
 823 }
 824
 825 int verify_stateless_cookie_callback(SSL *ssl, const unsigned char *cookie,
 826                                      size_t cookie_len)
 827 {
 828     return verify_cookie_callback(ssl, cookie, cookie_len);
 829 }
 830
 831 #endif
 832
 833 /*
 834  * Example of extended certificate handling. Where the standard support of
 835  * one certificate per algorithm is not sufficient an application can decide
 836  * which certificate(s) to use at runtime based on whatever criteria it deems
 837  * appropriate.
 838  */
 839
 840 /* Linked list of certificates, keys and chains */
 841 struct ssl_excert_st {
 842     int certform;
 843     const char *certfile;
 844     int keyform;
 845     const char *keyfile;
 846     const char *chainfile;
 847     X509 *cert;
 848     EVP_PKEY *key;
 849     STACK_OF(X509) *chain;
 850     int build_chain;
 851     struct ssl_excert_st *next, *prev;
 852 };
 853
 854 static STRINT_PAIR chain_flags[] = {
 855     {"Overall Validity", CERT_PKEY_VALID},
 856     {"Sign with EE key", CERT_PKEY_SIGN},
 857     {"EE signature", CERT_PKEY_EE_SIGNATURE},
 858     {"CA signature", CERT_PKEY_CA_SIGNATURE},
 859     {"EE key parameters", CERT_PKEY_EE_PARAM},
 860     {"CA key parameters", CERT_PKEY_CA_PARAM},
 861     {"Explicitly sign with EE key", CERT_PKEY_EXPLICIT_SIGN},
 862     {"Issuer Name", CERT_PKEY_ISSUER_NAME},
 863     {"Certificate Type", CERT_PKEY_CERT_TYPE},
 864     {NULL}
 865 };
 866
 867 static void print_chain_flags(SSL *s, int flags)
 868 {
 869     STRINT_PAIR *pp;
 870
 871     for (pp = chain_flags; pp->name; ++pp)
 872         BIO_printf(bio_err, "\t%s: %s\n",
 873                    pp->name,
 874                    (flags & pp->retval) ? "OK" : "NOT OK");
 875     BIO_printf(bio_err, "\tSuite B: ");
 876     if (SSL_set_cert_flags(s, 0) & SSL_CERT_FLAG_SUITEB_128_LOS)
 877         BIO_puts(bio_err, flags & CERT_PKEY_SUITEB ? "OK\n" : "NOT OK\n");
 878     else
 879         BIO_printf(bio_err, "not tested\n");
 880 }
 881
 882 /*
 883  * Very basic selection callback: just use any certificate chain reported as
 884  * valid. More sophisticated could prioritise according to local policy.
 885  */
 886 static int set_cert_cb(SSL *ssl, void *arg)
 887 {
 888     int i, rv;
 889     SSL_EXCERT *exc = arg;
 890 #ifdef CERT_CB_TEST_RETRY
 891     static int retry_cnt;
 892     if (retry_cnt < 5) {
 893         retry_cnt++;
 894         BIO_printf(bio_err,
 895                    "Certificate callback retry test: count %d\n",
 896                    retry_cnt);
 897         return -1;
 898     }
 899 #endif
 900     SSL_certs_clear(ssl);
 901
 902     if (exc == NULL)
 903         return 1;
 904
 905     /*
 906      * Go to end of list and traverse backwards since we prepend newer
 907      * entries this retains the original order.
 908      */
 909     while (exc->next != NULL)
 910         exc = exc->next;
 911
 912     i = 0;
 913
 914     while (exc != NULL) {
 915         i++;
 916         rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
 917         BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
 918         X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
 919                            get_nameopt());
 920         BIO_puts(bio_err, "\n");
 921         print_chain_flags(ssl, rv);
 922         if (rv & CERT_PKEY_VALID) {
 923             if (!SSL_use_certificate(ssl, exc->cert)
 924                     || !SSL_use_PrivateKey(ssl, exc->key)) {
 925                 return 0;
 926             }
 927             /*
 928              * NB: we wouldn't normally do this as it is not efficient
 929              * building chains on each connection better to cache the chain
 930              * in advance.
 931              */
 932             if (exc->build_chain) {
 933                 if (!SSL_build_cert_chain(ssl, 0))
 934                     return 0;
 935             } else if (exc->chain != NULL) {
 936                 SSL_set1_chain(ssl, exc->chain);
 937             }
 938         }
 939         exc = exc->prev;
 940     }
 941     return 1;
 942 }
 943
 944 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
 945 {
 946     SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
 947 }
 948
 949 static int ssl_excert_prepend(SSL_EXCERT **pexc)
 950 {
 951     SSL_EXCERT *exc = app_malloc(sizeof(*exc), "prepend cert");
 952
 953     memset(exc, 0, sizeof(*exc));
 954
 955     exc->next = *pexc;
 956     *pexc = exc;
 957
 958     if (exc->next) {
 959         exc->certform = exc->next->certform;
 960         exc->keyform = exc->next->keyform;
 961         exc->next->prev = exc;
 962     } else {
 963         exc->certform = FORMAT_PEM;
 964         exc->keyform = FORMAT_PEM;
 965     }
 966     return 1;
 967
 968 }
 969
 970 void ssl_excert_free(SSL_EXCERT *exc)
 971 {
 972     SSL_EXCERT *curr;
 973
 974     if (exc == NULL)
 975         return;
 976     while (exc) {
 977         X509_free(exc->cert);
 978         EVP_PKEY_free(exc->key);
 979         sk_X509_pop_free(exc->chain, X509_free);
 980         curr = exc;
 981         exc = exc->next;
 982         OPENSSL_free(curr);
 983     }
 984 }
 985
 986 int load_excert(SSL_EXCERT **pexc)
 987 {
 988     SSL_EXCERT *exc = *pexc;
 989     if (exc == NULL)
 990         return 1;
 991     /* If nothing in list, free and set to NULL */
 992     if (exc->certfile == NULL && exc->next == NULL) {
 993         ssl_excert_free(exc);
 994         *pexc = NULL;
 995         return 1;
 996     }
 997     for (; exc; exc = exc->next) {
 998         if (exc->certfile == NULL) {
 999             BIO_printf(bio_err, "Missing filename\n");
1000             return 0;
1001         }
1002         exc->cert = load_cert(exc->certfile, exc->certform,
1003                               "Server Certificate");
1004         if (exc->cert == NULL)
1005             return 0;
1006         if (exc->keyfile != NULL) {
1007             exc->key = load_key(exc->keyfile, exc->keyform,
1008                                 0, NULL, NULL, "Server Key");
1009         } else {
1010             exc->key = load_key(exc->certfile, exc->certform,
1011                                 0, NULL, NULL, "Server Key");
1012         }
1013         if (exc->key == NULL)
1014             return 0;
1015         if (exc->chainfile != NULL) {
1016             if (!load_certs(exc->chainfile, &exc->chain, FORMAT_PEM, NULL,
1017                             "Server Chain"))
1018                 return 0;
1019         }
1020     }
1021     return 1;
1022 }
1023
1024 enum range { OPT_X_ENUM };
1025
1026 int args_excert(int opt, SSL_EXCERT **pexc)
1027 {
1028     SSL_EXCERT *exc = *pexc;
1029
1030     assert(opt > OPT_X__FIRST);
1031     assert(opt < OPT_X__LAST);
1032
1033     if (exc == NULL) {
1034         if (!ssl_excert_prepend(&exc)) {
1035             BIO_printf(bio_err, " %s: Error initialising xcert\n",
1036                        opt_getprog());
1037             goto err;
1038         }
1039         *pexc = exc;
1040     }
1041
1042     switch ((enum range)opt) {
1043     case OPT_X__FIRST:
1044     case OPT_X__LAST:
1045         return 0;
1046     case OPT_X_CERT:
1047         if (exc->certfile != NULL && !ssl_excert_prepend(&exc)) {
1048             BIO_printf(bio_err, "%s: Error adding xcert\n", opt_getprog());
1049             goto err;
1050         }
1051         *pexc = exc;
1052         exc->certfile = opt_arg();
1053         break;
1054     case OPT_X_KEY:
1055         if (exc->keyfile != NULL) {
1056             BIO_printf(bio_err, "%s: Key already specified\n", opt_getprog());
1057             goto err;
1058         }
1059         exc->keyfile = opt_arg();
1060         break;
1061     case OPT_X_CHAIN:
1062         if (exc->chainfile != NULL) {
1063             BIO_printf(bio_err, "%s: Chain already specified\n",
1064                        opt_getprog());
1065             goto err;
1066         }
1067         exc->chainfile = opt_arg();
1068         break;
1069     case OPT_X_CHAIN_BUILD:
1070         exc->build_chain = 1;
1071         break;
1072     case OPT_X_CERTFORM:
1073         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->certform))
1074             return 0;
1075         break;
1076     case OPT_X_KEYFORM:
1077         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->keyform))
1078             return 0;
1079         break;
1080     }
1081     return 1;
1082
1083  err:
1084     ERR_print_errors(bio_err);
1085     ssl_excert_free(exc);
1086     *pexc = NULL;
1087     return 0;
1088 }
1089
1090 static void print_raw_cipherlist(SSL *s)
1091 {
1092     const unsigned char *rlist;
1093     static const unsigned char scsv_id[] = { 0, 0xFF };
1094     size_t i, rlistlen, num;
1095     if (!SSL_is_server(s))
1096         return;
1097     num = SSL_get0_raw_cipherlist(s, NULL);
1098     OPENSSL_assert(num == 2);
1099     rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
1100     BIO_puts(bio_err, "Client cipher list: ");
1101     for (i = 0; i < rlistlen; i += num, rlist += num) {
1102         const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
1103         if (i)
1104             BIO_puts(bio_err, ":");
1105         if (c != NULL) {
1106             BIO_puts(bio_err, SSL_CIPHER_get_name(c));
1107         } else if (memcmp(rlist, scsv_id, num) == 0) {
1108             BIO_puts(bio_err, "SCSV");
1109         } else {
1110             size_t j;
1111             BIO_puts(bio_err, "0x");
1112             for (j = 0; j < num; j++)
1113                 BIO_printf(bio_err, "%02X", rlist[j]);
1114         }
1115     }
1116     BIO_puts(bio_err, "\n");
1117 }
1118
1119 /*
1120  * Hex encoder for TLSA RRdata, not ':' delimited.
1121  */
1122 static char *hexencode(const unsigned char *data, size_t len)
1123 {
1124     static const char *hex = "0123456789abcdef";
1125     char *out;
1126     char *cp;
1127     size_t outlen = 2 * len + 1;
1128     int ilen = (int) outlen;
1129
1130     if (outlen < len || ilen < 0 || outlen != (size_t)ilen) {
1131         BIO_printf(bio_err, "%s: %zu-byte buffer too large to hexencode\n",
1132                    opt_getprog(), len);
1133         exit(1);
1134     }
1135     cp = out = app_malloc(ilen, "TLSA hex data buffer");
1136
1137     while (len-- > 0) {
1138         *cp++ = hex[(*data >> 4) & 0x0f];
1139         *cp++ = hex[*data++ & 0x0f];
1140     }
1141     *cp = '\0';
1142     return out;
1143 }
1144
1145 void print_verify_detail(SSL *s, BIO *bio)
1146 {
1147     int mdpth;
1148     EVP_PKEY *mspki;
1149     long verify_err = SSL_get_verify_result(s);
1150
1151     if (verify_err == X509_V_OK) {
1152         const char *peername = SSL_get0_peername(s);
1153
1154         BIO_printf(bio, "Verification: OK\n");
1155         if (peername != NULL)
1156             BIO_printf(bio, "Verified peername: %s\n", peername);
1157     } else {
1158         const char *reason = X509_verify_cert_error_string(verify_err);
1159
1160         BIO_printf(bio, "Verification error: %s\n", reason);
1161     }
1162
1163     if ((mdpth = SSL_get0_dane_authority(s, NULL, &mspki)) >= 0) {
1164         uint8_t usage, selector, mtype;
1165         const unsigned char *data = NULL;
1166         size_t dlen = 0;
1167         char *hexdata;
1168
1169         mdpth = SSL_get0_dane_tlsa(s, &usage, &selector, &mtype, &data, &dlen);
1170
1171         /*
1172          * The TLSA data field can be quite long when it is a certificate,
1173          * public key or even a SHA2-512 digest.  Because the initial octets of
1174          * ASN.1 certificates and public keys contain mostly boilerplate OIDs
1175          * and lengths, we show the last 12 bytes of the data instead, as these
1176          * are more likely to distinguish distinct TLSA records.
1177          */
1178 #define TLSA_TAIL_SIZE 12
1179         if (dlen > TLSA_TAIL_SIZE)
1180             hexdata = hexencode(data + dlen - TLSA_TAIL_SIZE, TLSA_TAIL_SIZE);
1181         else
1182             hexdata = hexencode(data, dlen);
1183         BIO_printf(bio, "DANE TLSA %d %d %d %s%s %s at depth %d\n",
1184                    usage, selector, mtype,
1185                    (dlen > TLSA_TAIL_SIZE) ? "..." : "", hexdata,
1186                    (mspki != NULL) ? "signed the certificate" :
1187                    mdpth ? "matched TA certificate" : "matched EE certificate",
1188                    mdpth);
1189         OPENSSL_free(hexdata);
1190     }
1191 }
1192
1193 void print_ssl_summary(SSL *s)
1194 {
1195     const SSL_CIPHER *c;
1196     X509 *peer;
1197
1198     BIO_printf(bio_err, "Protocol version: %s\n", SSL_get_version(s));
1199     print_raw_cipherlist(s);
1200     c = SSL_get_current_cipher(s);
1201     BIO_printf(bio_err, "Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
1202     do_print_sigalgs(bio_err, s, 0);
1203     peer = SSL_get_peer_certificate(s);
1204     if (peer != NULL) {
1205         int nid;
1206
1207         BIO_puts(bio_err, "Peer certificate: ");
1208         X509_NAME_print_ex(bio_err, X509_get_subject_name(peer),
1209                            0, get_nameopt());
1210         BIO_puts(bio_err, "\n");
1211         if (SSL_get_peer_signature_nid(s, &nid))
1212             BIO_printf(bio_err, "Hash used: %s\n", OBJ_nid2sn(nid));
1213         if (SSL_get_peer_signature_type_nid(s, &nid))
1214             BIO_printf(bio_err, "Signature type: %s\n", get_sigtype(nid));
1215         print_verify_detail(s, bio_err);
1216     } else {
1217         BIO_puts(bio_err, "No peer certificate\n");
1218     }
1219     X509_free(peer);
1220 #ifndef OPENSSL_NO_EC
1221     ssl_print_point_formats(bio_err, s);
1222     if (SSL_is_server(s))
1223         ssl_print_groups(bio_err, s, 1);
1224     else
1225         ssl_print_tmp_key(bio_err, s);
1226 #else
1227     if (!SSL_is_server(s))
1228         ssl_print_tmp_key(bio_err, s);
1229 #endif
1230 }
1231
1232 int config_ctx(SSL_CONF_CTX *cctx, STACK_OF(OPENSSL_STRING) *str,
1233                SSL_CTX *ctx)
1234 {
1235     int i;
1236
1237     SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
1238     for (i = 0; i < sk_OPENSSL_STRING_num(str); i += 2) {
1239         const char *flag = sk_OPENSSL_STRING_value(str, i);
1240         const char *arg = sk_OPENSSL_STRING_value(str, i + 1);
1241         if (SSL_CONF_cmd(cctx, flag, arg) <= 0) {
1242             if (arg != NULL)
1243                 BIO_printf(bio_err, "Error with command: \"%s %s\"\n",
1244                            flag, arg);
1245             else
1246                 BIO_printf(bio_err, "Error with command: \"%s\"\n", flag);
1247             ERR_print_errors(bio_err);
1248             return 0;
1249         }
1250     }
1251     if (!SSL_CONF_CTX_finish(cctx)) {
1252         BIO_puts(bio_err, "Error finishing context\n");
1253         ERR_print_errors(bio_err);
1254         return 0;
1255     }
1256     return 1;
1257 }
1258
1259 static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
1260 {
1261     X509_CRL *crl;
1262     int i;
1263     for (i = 0; i < sk_X509_CRL_num(crls); i++) {
1264         crl = sk_X509_CRL_value(crls, i);
1265         X509_STORE_add_crl(st, crl);
1266     }
1267     return 1;
1268 }
1269
1270 int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls, int crl_download)
1271 {
1272     X509_STORE *st;
1273     st = SSL_CTX_get_cert_store(ctx);
1274     add_crls_store(st, crls);
1275     if (crl_download)
1276         store_setup_crl_download(st);
1277     return 1;
1278 }
1279
1280 int ssl_load_stores(SSL_CTX *ctx,
1281                     const char *vfyCApath, const char *vfyCAfile,
1282                     const char *chCApath, const char *chCAfile,
1283                     STACK_OF(X509_CRL) *crls, int crl_download)
1284 {
1285     X509_STORE *vfy = NULL, *ch = NULL;
1286     int rv = 0;
1287     if (vfyCApath != NULL || vfyCAfile != NULL) {
1288         vfy = X509_STORE_new();
1289         if (vfy == NULL)
1290             goto err;
1291         if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
1292             goto err;
1293         add_crls_store(vfy, crls);
1294         SSL_CTX_set1_verify_cert_store(ctx, vfy);
1295         if (crl_download)
1296             store_setup_crl_download(vfy);
1297     }
1298     if (chCApath != NULL || chCAfile != NULL) {
1299         ch = X509_STORE_new();
1300         if (ch == NULL)
1301             goto err;
1302         if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
1303             goto err;
1304         SSL_CTX_set1_chain_cert_store(ctx, ch);
1305     }
1306     rv = 1;
1307  err:
1308     X509_STORE_free(vfy);
1309     X509_STORE_free(ch);
1310     return rv;
1311 }
1312
1313 /* Verbose print out of security callback */
1314
1315 typedef struct {
1316     BIO *out;
1317     int verbose;
1318     int (*old_cb) (const SSL *s, const SSL_CTX *ctx, int op, int bits, int nid,
1319                    void *other, void *ex);
1320 } security_debug_ex;
1321
1322 static STRINT_PAIR callback_types[] = {
1323     {"Supported Ciphersuite", SSL_SECOP_CIPHER_SUPPORTED},
1324     {"Shared Ciphersuite", SSL_SECOP_CIPHER_SHARED},
1325     {"Check Ciphersuite", SSL_SECOP_CIPHER_CHECK},
1326 #ifndef OPENSSL_NO_DH
1327     {"Temp DH key bits", SSL_SECOP_TMP_DH},
1328 #endif
1329     {"Supported Curve", SSL_SECOP_CURVE_SUPPORTED},
1330     {"Shared Curve", SSL_SECOP_CURVE_SHARED},
1331     {"Check Curve", SSL_SECOP_CURVE_CHECK},
1332     {"Supported Signature Algorithm", SSL_SECOP_SIGALG_SUPPORTED},
1333     {"Shared Signature Algorithm", SSL_SECOP_SIGALG_SHARED},
1334     {"Check Signature Algorithm", SSL_SECOP_SIGALG_CHECK},
1335     {"Signature Algorithm mask", SSL_SECOP_SIGALG_MASK},
1336     {"Certificate chain EE key", SSL_SECOP_EE_KEY},
1337     {"Certificate chain CA key", SSL_SECOP_CA_KEY},
1338     {"Peer Chain EE key", SSL_SECOP_PEER_EE_KEY},
1339     {"Peer Chain CA key", SSL_SECOP_PEER_CA_KEY},
1340     {"Certificate chain CA digest", SSL_SECOP_CA_MD},
1341     {"Peer chain CA digest", SSL_SECOP_PEER_CA_MD},
1342     {"SSL compression", SSL_SECOP_COMPRESSION},
1343     {"Session ticket", SSL_SECOP_TICKET},
1344     {NULL}
1345 };
1346
1347 static int security_callback_debug(const SSL *s, const SSL_CTX *ctx,
1348                                    int op, int bits, int nid,
1349                                    void *other, void *ex)
1350 {
1351     security_debug_ex *sdb = ex;
1352     int rv, show_bits = 1, cert_md = 0;
1353     const char *nm;
1354     int show_nm;
1355     rv = sdb->old_cb(s, ctx, op, bits, nid, other, ex);
1356     if (rv == 1 && sdb->verbose < 2)
1357         return 1;
1358     BIO_puts(sdb->out, "Security callback: ");
1359
1360     nm = lookup(op, callback_types, NULL);
1361     show_nm = nm != NULL;
1362     switch (op) {
1363     case SSL_SECOP_TICKET:
1364     case SSL_SECOP_COMPRESSION:
1365         show_bits = 0;
1366         show_nm = 0;
1367         break;
1368     case SSL_SECOP_VERSION:
1369         BIO_printf(sdb->out, "Version=%s", lookup(nid, ssl_versions, "???"));
1370         show_bits = 0;
1371         show_nm = 0;
1372         break;
1373     case SSL_SECOP_CA_MD:
1374     case SSL_SECOP_PEER_CA_MD:
1375         cert_md = 1;
1376         break;
1377     case SSL_SECOP_SIGALG_SUPPORTED:
1378     case SSL_SECOP_SIGALG_SHARED:
1379     case SSL_SECOP_SIGALG_CHECK:
1380     case SSL_SECOP_SIGALG_MASK:
1381         show_nm = 0;
1382         break;
1383     }
1384     if (show_nm)
1385         BIO_printf(sdb->out, "%s=", nm);
1386
1387     switch (op & SSL_SECOP_OTHER_TYPE) {
1388
1389     case SSL_SECOP_OTHER_CIPHER:
1390         BIO_puts(sdb->out, SSL_CIPHER_get_name(other));
1391         break;
1392
1393 #ifndef OPENSSL_NO_EC
1394     case SSL_SECOP_OTHER_CURVE:
1395         {
1396             const char *cname;
1397             cname = EC_curve_nid2nist(nid);
1398             if (cname == NULL)
1399                 cname = OBJ_nid2sn(nid);
1400             BIO_puts(sdb->out, cname);
1401         }
1402         break;
1403 #endif
1404 #ifndef OPENSSL_NO_DH
1405     case SSL_SECOP_OTHER_DH:
1406         {
1407             DH *dh = other;
1408             BIO_printf(sdb->out, "%d", DH_bits(dh));
1409             break;
1410         }
1411 #endif
1412     case SSL_SECOP_OTHER_CERT:
1413         {
1414             if (cert_md) {
1415                 int sig_nid = X509_get_signature_nid(other);
1416                 BIO_puts(sdb->out, OBJ_nid2sn(sig_nid));
1417             } else {
1418                 EVP_PKEY *pkey = X509_get0_pubkey(other);
1419                 const char *algname = "";
1420                 EVP_PKEY_asn1_get0_info(NULL, NULL, NULL, NULL,
1421                                         &algname, EVP_PKEY_get0_asn1(pkey));
1422                 BIO_printf(sdb->out, "%s, bits=%d",
1423                            algname, EVP_PKEY_bits(pkey));
1424             }
1425             break;
1426         }
1427     case SSL_SECOP_OTHER_SIGALG:
1428         {
1429             const unsigned char *salg = other;
1430             const char *sname = NULL;
1431             int raw_sig_code = (salg[0] << 8) + salg[1]; /* always big endian (msb, lsb) */
1432                 /* raw_sig_code: signature_scheme from tls1.3, or signature_and_hash from tls1.2 */
1433
1434             if (nm != NULL)
1435                 BIO_printf(sdb->out, "%s", nm);
1436             else
1437                 BIO_printf(sdb->out, "s_cb.c:security_callback_debug op=0x%x", op);
1438
1439             sname = lookup(raw_sig_code, signature_tls13_scheme_list, NULL);
1440             if (sname != NULL) {
1441                 BIO_printf(sdb->out, " scheme=%s", sname);
1442             } else {
1443                 int alg_code = salg[1];
1444                 int hash_code = salg[0];
1445                 const char *alg_str = lookup(alg_code, signature_tls12_alg_list, NULL);
1446                 const char *hash_str = lookup(hash_code, signature_tls12_hash_list, NULL);
1447
1448                 if (alg_str != NULL && hash_str != NULL)
1449                     BIO_printf(sdb->out, " digest=%s, algorithm=%s", hash_str, alg_str);
1450                 else
1451                     BIO_printf(sdb->out, " scheme=unknown(0x%04x)", raw_sig_code);
1452             }
1453         }
1454
1455     }
1456
1457     if (show_bits)
1458         BIO_printf(sdb->out, ", security bits=%d", bits);
1459     BIO_printf(sdb->out, ": %s\n", rv ? "yes" : "no");
1460     return rv;
1461 }
1462
1463 void ssl_ctx_security_debug(SSL_CTX *ctx, int verbose)
1464 {
1465     static security_debug_ex sdb;
1466
1467     sdb.out = bio_err;
1468     sdb.verbose = verbose;
1469     sdb.old_cb = SSL_CTX_get_security_callback(ctx);
1470     SSL_CTX_set_security_callback(ctx, security_callback_debug);
1471     SSL_CTX_set0_security_ex_data(ctx, &sdb);
1472 }
1473
1474 static void keylog_callback(const SSL *ssl, const char *line)
1475 {
1476     if (bio_keylog == NULL) {
1477         BIO_printf(bio_err, "Keylog callback is invoked without valid file!\n");
1478         return;
1479     }
1480
1481     /*
1482      * There might be concurrent writers to the keylog file, so we must ensure
1483      * that the given line is written at once.
1484      */
1485     BIO_printf(bio_keylog, "%s\n", line);
1486     (void)BIO_flush(bio_keylog);
1487 }
1488
1489 int set_keylog_file(SSL_CTX *ctx, const char *keylog_file)
1490 {
1491     /* Close any open files */
1492     BIO_free_all(bio_keylog);
1493     bio_keylog = NULL;
1494
1495     if (ctx == NULL || keylog_file == NULL) {
1496         /* Keylogging is disabled, OK. */
1497         return 0;
1498     }
1499
1500     /*
1501      * Append rather than write in order to allow concurrent modification.
1502      * Furthermore, this preserves existing keylog files which is useful when
1503      * the tool is run multiple times.
1504      */
1505     bio_keylog = BIO_new_file(keylog_file, "a");
1506     if (bio_keylog == NULL) {
1507         BIO_printf(bio_err, "Error writing keylog file %s\n", keylog_file);
1508         return 1;
1509     }
1510
1511     /* Write a header for seekable, empty files (this excludes pipes). */
1512     if (BIO_tell(bio_keylog) == 0) {
1513         BIO_puts(bio_keylog,
1514                  "# SSL/TLS secrets log file, generated by OpenSSL\n");
1515         (void)BIO_flush(bio_keylog);
1516     }
1517     SSL_CTX_set_keylog_callback(ctx, keylog_callback);
1518     return 0;
1519 }
1520
1521 void print_ca_names(BIO *bio, SSL *s)
1522 {
1523     const char *cs = SSL_is_server(s) ? "server" : "client";
1524     const STACK_OF(X509_NAME) *sk = SSL_get0_peer_CA_list(s);
1525     int i;
1526
1527     if (sk == NULL || sk_X509_NAME_num(sk) == 0) {
1528         BIO_printf(bio, "---\nNo %s certificate CA names sent\n", cs);
1529         return;
1530     }
1531
1532     BIO_printf(bio, "---\nAcceptable %s certificate CA names\n",cs);
1533     for (i = 0; i < sk_X509_NAME_num(sk); i++) {
1534         X509_NAME_print_ex(bio, sk_X509_NAME_value(sk, i), 0, get_nameopt());
1535         BIO_write(bio, "\n", 1);
1536     }
1537 }