apps/s_cb.c

   1 /*
   2  * Copyright 1995-2016 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 #define USE_SOCKETS
  15 #include "apps.h"
  16 #undef USE_SOCKETS
  17 #include <openssl/err.h>
  18 #include <openssl/rand.h>
  19 #include <openssl/x509.h>
  20 #include <openssl/ssl.h>
  21 #include <openssl/bn.h>
  22 #ifndef OPENSSL_NO_DH
  23 # include <openssl/dh.h>
  24 #endif
  25 #include "s_apps.h"
  26
  27 #define COOKIE_SECRET_LENGTH    16
  28
  29 VERIFY_CB_ARGS verify_args = { 0, 0, X509_V_OK, 0 };
  30
  31 #ifndef OPENSSL_NO_SOCK
  32 static unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
  33 static int cookie_initialized = 0;
  34 #endif
  35 static BIO *bio_keylog = NULL;
  36
  37 static const char *lookup(int val, const STRINT_PAIR* list, const char* def)
  38 {
  39     for ( ; list->name; ++list)
  40         if (list->retval == val)
  41             return list->name;
  42     return def;
  43 }
  44
  45 int verify_callback(int ok, X509_STORE_CTX *ctx)
  46 {
  47     X509 *err_cert;
  48     int err, depth;
  49
  50     err_cert = X509_STORE_CTX_get_current_cert(ctx);
  51     err = X509_STORE_CTX_get_error(ctx);
  52     depth = X509_STORE_CTX_get_error_depth(ctx);
  53
  54     if (!verify_args.quiet || !ok) {
  55         BIO_printf(bio_err, "depth=%d ", depth);
  56         if (err_cert != NULL) {
  57             X509_NAME_print_ex(bio_err,
  58                                X509_get_subject_name(err_cert),
  59                                0, get_nameopt());
  60             BIO_puts(bio_err, "\n");
  61         } else {
  62             BIO_puts(bio_err, "<no cert>\n");
  63         }
  64     }
  65     if (!ok) {
  66         BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
  67                    X509_verify_cert_error_string(err));
  68         if (verify_args.depth >= depth) {
  69             if (!verify_args.return_error)
  70                 ok = 1;
  71             verify_args.error = err;
  72         } else {
  73             ok = 0;
  74             verify_args.error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
  75         }
  76     }
  77     switch (err) {
  78     case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
  79         BIO_puts(bio_err, "issuer= ");
  80         X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
  81                            0, get_nameopt());
  82         BIO_puts(bio_err, "\n");
  83         break;
  84     case X509_V_ERR_CERT_NOT_YET_VALID:
  85     case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
  86         BIO_printf(bio_err, "notBefore=");
  87         ASN1_TIME_print(bio_err, X509_get0_notBefore(err_cert));
  88         BIO_printf(bio_err, "\n");
  89         break;
  90     case X509_V_ERR_CERT_HAS_EXPIRED:
  91     case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
  92         BIO_printf(bio_err, "notAfter=");
  93         ASN1_TIME_print(bio_err, X509_get0_notAfter(err_cert));
  94         BIO_printf(bio_err, "\n");
  95         break;
  96     case X509_V_ERR_NO_EXPLICIT_POLICY:
  97         if (!verify_args.quiet)
  98             policies_print(ctx);
  99         break;
 100     }
 101     if (err == X509_V_OK && ok == 2 && !verify_args.quiet)
 102         policies_print(ctx);
 103     if (ok && !verify_args.quiet)
 104         BIO_printf(bio_err, "verify return:%d\n", ok);
 105     return (ok);
 106 }
 107
 108 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 109 {
 110     if (cert_file != NULL) {
 111         if (SSL_CTX_use_certificate_file(ctx, cert_file,
 112                                          SSL_FILETYPE_PEM) <= 0) {
 113             BIO_printf(bio_err, "unable to get certificate from '%s'\n",
 114                        cert_file);
 115             ERR_print_errors(bio_err);
 116             return (0);
 117         }
 118         if (key_file == NULL)
 119             key_file = cert_file;
 120         if (SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0) {
 121             BIO_printf(bio_err, "unable to get private key from '%s'\n",
 122                        key_file);
 123             ERR_print_errors(bio_err);
 124             return (0);
 125         }
 126
 127         /*
 128          * If we are using DSA, we can copy the parameters from the private
 129          * key
 130          */
 131
 132         /*
 133          * Now we know that a key and cert have been set against the SSL
 134          * context
 135          */
 136         if (!SSL_CTX_check_private_key(ctx)) {
 137             BIO_printf(bio_err,
 138                        "Private key does not match the certificate public key\n");
 139             return (0);
 140         }
 141     }
 142     return (1);
 143 }
 144
 145 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
 146                        STACK_OF(X509) *chain, int build_chain)
 147 {
 148     int chflags = chain ? SSL_BUILD_CHAIN_FLAG_CHECK : 0;
 149     if (cert == NULL)
 150         return 1;
 151     if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
 152         BIO_printf(bio_err, "error setting certificate\n");
 153         ERR_print_errors(bio_err);
 154         return 0;
 155     }
 156
 157     if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
 158         BIO_printf(bio_err, "error setting private key\n");
 159         ERR_print_errors(bio_err);
 160         return 0;
 161     }
 162
 163     /*
 164      * Now we know that a key and cert have been set against the SSL context
 165      */
 166     if (!SSL_CTX_check_private_key(ctx)) {
 167         BIO_printf(bio_err,
 168                    "Private key does not match the certificate public key\n");
 169         return 0;
 170     }
 171     if (chain && !SSL_CTX_set1_chain(ctx, chain)) {
 172         BIO_printf(bio_err, "error setting certificate chain\n");
 173         ERR_print_errors(bio_err);
 174         return 0;
 175     }
 176     if (build_chain && !SSL_CTX_build_cert_chain(ctx, chflags)) {
 177         BIO_printf(bio_err, "error building certificate chain\n");
 178         ERR_print_errors(bio_err);
 179         return 0;
 180     }
 181     return 1;
 182 }
 183
 184 static STRINT_PAIR cert_type_list[] = {
 185     {"RSA sign", TLS_CT_RSA_SIGN},
 186     {"DSA sign", TLS_CT_DSS_SIGN},
 187     {"RSA fixed DH", TLS_CT_RSA_FIXED_DH},
 188     {"DSS fixed DH", TLS_CT_DSS_FIXED_DH},
 189     {"ECDSA sign", TLS_CT_ECDSA_SIGN},
 190     {"RSA fixed ECDH", TLS_CT_RSA_FIXED_ECDH},
 191     {"ECDSA fixed ECDH", TLS_CT_ECDSA_FIXED_ECDH},
 192     {"GOST01 Sign", TLS_CT_GOST01_SIGN},
 193     {NULL}
 194 };
 195
 196 static void ssl_print_client_cert_types(BIO *bio, SSL *s)
 197 {
 198     const unsigned char *p;
 199     int i;
 200     int cert_type_num = SSL_get0_certificate_types(s, &p);
 201     if (!cert_type_num)
 202         return;
 203     BIO_puts(bio, "Client Certificate Types: ");
 204     for (i = 0; i < cert_type_num; i++) {
 205         unsigned char cert_type = p[i];
 206         const char *cname = lookup((int)cert_type, cert_type_list, NULL);
 207
 208         if (i)
 209             BIO_puts(bio, ", ");
 210         if (cname != NULL)
 211             BIO_puts(bio, cname);
 212         else
 213             BIO_printf(bio, "UNKNOWN (%d),", cert_type);
 214     }
 215     BIO_puts(bio, "\n");
 216 }
 217
 218 static const char *get_sigtype(int nid)
 219 {
 220     switch (nid) {
 221     case EVP_PKEY_RSA:
 222         return "RSA";
 223
 224     case EVP_PKEY_RSA_PSS:
 225         return "RSA-PSS";
 226
 227     case EVP_PKEY_DSA:
 228         return "DSA";
 229
 230      case EVP_PKEY_EC:
 231         return "ECDSA";
 232
 233     default:
 234         return NULL;
 235     }
 236 }
 237
 238 static int do_print_sigalgs(BIO *out, SSL *s, int shared)
 239 {
 240     int i, nsig, client;
 241     client = SSL_is_server(s) ? 0 : 1;
 242     if (shared)
 243         nsig = SSL_get_shared_sigalgs(s, 0, NULL, NULL, NULL, NULL, NULL);
 244     else
 245         nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 246     if (nsig == 0)
 247         return 1;
 248
 249     if (shared)
 250         BIO_puts(out, "Shared ");
 251
 252     if (client)
 253         BIO_puts(out, "Requested ");
 254     BIO_puts(out, "Signature Algorithms: ");
 255     for (i = 0; i < nsig; i++) {
 256         int hash_nid, sign_nid;
 257         unsigned char rhash, rsign;
 258         const char *sstr = NULL;
 259         if (shared)
 260             SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 261                                    &rsign, &rhash);
 262         else
 263             SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL, &rsign, &rhash);
 264         if (i)
 265             BIO_puts(out, ":");
 266         sstr = get_sigtype(sign_nid);
 267         if (sstr)
 268             BIO_printf(out, "%s+", sstr);
 269         else
 270             BIO_printf(out, "0x%02X+", (int)rsign);
 271         if (hash_nid != NID_undef)
 272             BIO_printf(out, "%s", OBJ_nid2sn(hash_nid));
 273         else
 274             BIO_printf(out, "0x%02X", (int)rhash);
 275     }
 276     BIO_puts(out, "\n");
 277     return 1;
 278 }
 279
 280 int ssl_print_sigalgs(BIO *out, SSL *s)
 281 {
 282     int nid;
 283     if (!SSL_is_server(s))
 284         ssl_print_client_cert_types(out, s);
 285     do_print_sigalgs(out, s, 0);
 286     do_print_sigalgs(out, s, 1);
 287     if (SSL_get_peer_signature_nid(s, &nid))
 288         BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(nid));
 289     if (SSL_get_peer_signature_type_nid(s, &nid))
 290         BIO_printf(out, "Peer signature type: %s\n", get_sigtype(nid));
 291     return 1;
 292 }
 293
 294 #ifndef OPENSSL_NO_EC
 295 int ssl_print_point_formats(BIO *out, SSL *s)
 296 {
 297     int i, nformats;
 298     const char *pformats;
 299     nformats = SSL_get0_ec_point_formats(s, &pformats);
 300     if (nformats <= 0)
 301         return 1;
 302     BIO_puts(out, "Supported Elliptic Curve Point Formats: ");
 303     for (i = 0; i < nformats; i++, pformats++) {
 304         if (i)
 305             BIO_puts(out, ":");
 306         switch (*pformats) {
 307         case TLSEXT_ECPOINTFORMAT_uncompressed:
 308             BIO_puts(out, "uncompressed");
 309             break;
 310
 311         case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime:
 312             BIO_puts(out, "ansiX962_compressed_prime");
 313             break;
 314
 315         case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2:
 316             BIO_puts(out, "ansiX962_compressed_char2");
 317             break;
 318
 319         default:
 320             BIO_printf(out, "unknown(%d)", (int)*pformats);
 321             break;
 322
 323         }
 324     }
 325     BIO_puts(out, "\n");
 326     return 1;
 327 }
 328
 329 int ssl_print_groups(BIO *out, SSL *s, int noshared)
 330 {
 331     int i, ngroups, *groups, nid;
 332     const char *gname;
 333
 334     ngroups = SSL_get1_groups(s, NULL);
 335     if (ngroups <= 0)
 336         return 1;
 337     groups = app_malloc(ngroups * sizeof(int), "groups to print");
 338     SSL_get1_groups(s, groups);
 339
 340     BIO_puts(out, "Supported Elliptic Groups: ");
 341     for (i = 0; i < ngroups; i++) {
 342         if (i)
 343             BIO_puts(out, ":");
 344         nid = groups[i];
 345         /* If unrecognised print out hex version */
 346         if (nid & TLSEXT_nid_unknown) {
 347             BIO_printf(out, "0x%04X", nid & 0xFFFF);
 348         } else {
 349             /* TODO(TLS1.3): Get group name here */
 350             /* Use NIST name for curve if it exists */
 351             gname = EC_curve_nid2nist(nid);
 352             if (gname == NULL)
 353                 gname = OBJ_nid2sn(nid);
 354             BIO_printf(out, "%s", gname);
 355         }
 356     }
 357     OPENSSL_free(groups);
 358     if (noshared) {
 359         BIO_puts(out, "\n");
 360         return 1;
 361     }
 362     BIO_puts(out, "\nShared Elliptic groups: ");
 363     ngroups = SSL_get_shared_group(s, -1);
 364     for (i = 0; i < ngroups; i++) {
 365         if (i)
 366             BIO_puts(out, ":");
 367         nid = SSL_get_shared_group(s, i);
 368         /* TODO(TLS1.3): Convert for DH groups */
 369         gname = EC_curve_nid2nist(nid);
 370         if (gname == NULL)
 371             gname = OBJ_nid2sn(nid);
 372         BIO_printf(out, "%s", gname);
 373     }
 374     if (ngroups == 0)
 375         BIO_puts(out, "NONE");
 376     BIO_puts(out, "\n");
 377     return 1;
 378 }
 379 #endif
 380
 381 int ssl_print_tmp_key(BIO *out, SSL *s)
 382 {
 383     EVP_PKEY *key;
 384     if (!SSL_get_server_tmp_key(s, &key))
 385         return 1;
 386     BIO_puts(out, "Server Temp Key: ");
 387     switch (EVP_PKEY_id(key)) {
 388     case EVP_PKEY_RSA:
 389         BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
 390         break;
 391
 392     case EVP_PKEY_DH:
 393         BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
 394         break;
 395 #ifndef OPENSSL_NO_EC
 396     case EVP_PKEY_EC:
 397         {
 398             EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
 399             int nid;
 400             const char *cname;
 401             nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 402             EC_KEY_free(ec);
 403             cname = EC_curve_nid2nist(nid);
 404             if (cname == NULL)
 405                 cname = OBJ_nid2sn(nid);
 406             BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(key));
 407         }
 408     break;
 409 #endif
 410     default:
 411         BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(key)),
 412                    EVP_PKEY_bits(key));
 413     }
 414     EVP_PKEY_free(key);
 415     return 1;
 416 }
 417
 418 long bio_dump_callback(BIO *bio, int cmd, const char *argp,
 419                        int argi, long argl, long ret)
 420 {
 421     BIO *out;
 422
 423     out = (BIO *)BIO_get_callback_arg(bio);
 424     if (out == NULL)
 425         return (ret);
 426
 427     if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
 428         BIO_printf(out, "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 429                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 430         BIO_dump(out, argp, (int)ret);
 431         return (ret);
 432     } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
 433         BIO_printf(out, "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 434                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 435         BIO_dump(out, argp, (int)ret);
 436     }
 437     return (ret);
 438 }
 439
 440 void apps_ssl_info_callback(const SSL *s, int where, int ret)
 441 {
 442     const char *str;
 443     int w;
 444
 445     w = where & ~SSL_ST_MASK;
 446
 447     if (w & SSL_ST_CONNECT)
 448         str = "SSL_connect";
 449     else if (w & SSL_ST_ACCEPT)
 450         str = "SSL_accept";
 451     else
 452         str = "undefined";
 453
 454     if (where & SSL_CB_LOOP) {
 455         BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
 456     } else if (where & SSL_CB_ALERT) {
 457         str = (where & SSL_CB_READ) ? "read" : "write";
 458         BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n",
 459                    str,
 460                    SSL_alert_type_string_long(ret),
 461                    SSL_alert_desc_string_long(ret));
 462     } else if (where & SSL_CB_EXIT) {
 463         if (ret == 0)
 464             BIO_printf(bio_err, "%s:failed in %s\n",
 465                        str, SSL_state_string_long(s));
 466         else if (ret < 0)
 467             BIO_printf(bio_err, "%s:error in %s\n",
 468                        str, SSL_state_string_long(s));
 469     }
 470 }
 471
 472 static STRINT_PAIR ssl_versions[] = {
 473     {"SSL 3.0", SSL3_VERSION},
 474     {"TLS 1.0", TLS1_VERSION},
 475     {"TLS 1.1", TLS1_1_VERSION},
 476     {"TLS 1.2", TLS1_2_VERSION},
 477     {"TLS 1.3", TLS1_3_VERSION},
 478     {"DTLS 1.0", DTLS1_VERSION},
 479     {"DTLS 1.0 (bad)", DTLS1_BAD_VER},
 480     {NULL}
 481 };
 482
 483 static STRINT_PAIR alert_types[] = {
 484     {" close_notify", 0},
 485     {" end_of_early_data", 1},
 486     {" unexpected_message", 10},
 487     {" bad_record_mac", 20},
 488     {" decryption_failed", 21},
 489     {" record_overflow", 22},
 490     {" decompression_failure", 30},
 491     {" handshake_failure", 40},
 492     {" bad_certificate", 42},
 493     {" unsupported_certificate", 43},
 494     {" certificate_revoked", 44},
 495     {" certificate_expired", 45},
 496     {" certificate_unknown", 46},
 497     {" illegal_parameter", 47},
 498     {" unknown_ca", 48},
 499     {" access_denied", 49},
 500     {" decode_error", 50},
 501     {" decrypt_error", 51},
 502     {" export_restriction", 60},
 503     {" protocol_version", 70},
 504     {" insufficient_security", 71},
 505     {" internal_error", 80},
 506     {" inappropriate_fallback", 86},
 507     {" user_canceled", 90},
 508     {" no_renegotiation", 100},
 509     {" missing_extension", 109},
 510     {" unsupported_extension", 110},
 511     {" certificate_unobtainable", 111},
 512     {" unrecognized_name", 112},
 513     {" bad_certificate_status_response", 113},
 514     {" bad_certificate_hash_value", 114},
 515     {" unknown_psk_identity", 115},
 516     {" certificate_required", 116},
 517     {NULL}
 518 };
 519
 520 static STRINT_PAIR handshakes[] = {
 521     {", HelloRequest", SSL3_MT_HELLO_REQUEST},
 522     {", ClientHello", SSL3_MT_CLIENT_HELLO},
 523     {", ServerHello", SSL3_MT_SERVER_HELLO},
 524     {", HelloVerifyRequest", DTLS1_MT_HELLO_VERIFY_REQUEST},
 525     {", NewSessionTicket", SSL3_MT_NEWSESSION_TICKET},
 526     {", EndOfEarlyData", SSL3_MT_END_OF_EARLY_DATA},
 527     {", HelloRetryRequest", SSL3_MT_HELLO_RETRY_REQUEST},
 528     {", EncryptedExtensions", SSL3_MT_ENCRYPTED_EXTENSIONS},
 529     {", Certificate", SSL3_MT_CERTIFICATE},
 530     {", ServerKeyExchange", SSL3_MT_SERVER_KEY_EXCHANGE},
 531     {", CertificateRequest", SSL3_MT_CERTIFICATE_REQUEST},
 532     {", ServerHelloDone", SSL3_MT_SERVER_DONE},
 533     {", CertificateVerify", SSL3_MT_CERTIFICATE_VERIFY},
 534     {", ClientKeyExchange", SSL3_MT_CLIENT_KEY_EXCHANGE},
 535     {", Finished", SSL3_MT_FINISHED},
 536     {", CertificateUrl", 21},
 537     {", CertificateStatus", SSL3_MT_CERTIFICATE_STATUS},
 538     {", SupplementalData", 23},
 539     {", KeyUpdate", SSL3_MT_KEY_UPDATE},
 540 #ifndef OPENSSL_NO_NEXTPROTONEG
 541     {", NextProto", SSL3_MT_NEXT_PROTO},
 542 #endif
 543     {", MessageHash", SSL3_MT_MESSAGE_HASH},
 544     {NULL}
 545 };
 546
 547 void msg_cb(int write_p, int version, int content_type, const void *buf,
 548             size_t len, SSL *ssl, void *arg)
 549 {
 550     BIO *bio = arg;
 551     const char *str_write_p = write_p ? ">>>" : "<<<";
 552     const char *str_version = lookup(version, ssl_versions, "???");
 553     const char *str_content_type = "", *str_details1 = "", *str_details2 = "";
 554     const unsigned char* bp = buf;
 555
 556     if (version == SSL3_VERSION ||
 557         version == TLS1_VERSION ||
 558         version == TLS1_1_VERSION ||
 559         version == TLS1_2_VERSION ||
 560         version == TLS1_3_VERSION ||
 561         version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
 562         switch (content_type) {
 563         case 20:
 564             str_content_type = ", ChangeCipherSpec";
 565             break;
 566         case 21:
 567             str_content_type = ", Alert";
 568             str_details1 = ", ???";
 569             if (len == 2) {
 570                 switch (bp[0]) {
 571                 case 1:
 572                     str_details1 = ", warning";
 573                     break;
 574                 case 2:
 575                     str_details1 = ", fatal";
 576                     break;
 577                 }
 578                 str_details2 = lookup((int)bp[1], alert_types, " ???");
 579             }
 580             break;
 581         case 22:
 582             str_content_type = ", Handshake";
 583             str_details1 = "???";
 584             if (len > 0)
 585                 str_details1 = lookup((int)bp[0], handshakes, "???");
 586             break;
 587         case 23:
 588             str_content_type = ", ApplicationData";
 589             break;
 590 #ifndef OPENSSL_NO_HEARTBEATS
 591         case 24:
 592             str_details1 = ", Heartbeat";
 593
 594             if (len > 0) {
 595                 switch (bp[0]) {
 596                 case 1:
 597                     str_details1 = ", HeartbeatRequest";
 598                     break;
 599                 case 2:
 600                     str_details1 = ", HeartbeatResponse";
 601                     break;
 602                 }
 603             }
 604             break;
 605 #endif
 606         }
 607     }
 608
 609     BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version,
 610                str_content_type, (unsigned long)len, str_details1,
 611                str_details2);
 612
 613     if (len > 0) {
 614         size_t num, i;
 615
 616         BIO_printf(bio, "   ");
 617         num = len;
 618         for (i = 0; i < num; i++) {
 619             if (i % 16 == 0 && i > 0)
 620                 BIO_printf(bio, "\n   ");
 621             BIO_printf(bio, " %02x", ((const unsigned char *)buf)[i]);
 622         }
 623         if (i < len)
 624             BIO_printf(bio, " ...");
 625         BIO_printf(bio, "\n");
 626     }
 627     (void)BIO_flush(bio);
 628 }
 629
 630 static STRINT_PAIR tlsext_types[] = {
 631     {"server name", TLSEXT_TYPE_server_name},
 632     {"max fragment length", TLSEXT_TYPE_max_fragment_length},
 633     {"client certificate URL", TLSEXT_TYPE_client_certificate_url},
 634     {"trusted CA keys", TLSEXT_TYPE_trusted_ca_keys},
 635     {"truncated HMAC", TLSEXT_TYPE_truncated_hmac},
 636     {"status request", TLSEXT_TYPE_status_request},
 637     {"user mapping", TLSEXT_TYPE_user_mapping},
 638     {"client authz", TLSEXT_TYPE_client_authz},
 639     {"server authz", TLSEXT_TYPE_server_authz},
 640     {"cert type", TLSEXT_TYPE_cert_type},
 641     {"supported_groups", TLSEXT_TYPE_supported_groups},
 642     {"EC point formats", TLSEXT_TYPE_ec_point_formats},
 643     {"SRP", TLSEXT_TYPE_srp},
 644     {"signature algorithms", TLSEXT_TYPE_signature_algorithms},
 645     {"use SRTP", TLSEXT_TYPE_use_srtp},
 646     {"heartbeat", TLSEXT_TYPE_heartbeat},
 647     {"session ticket", TLSEXT_TYPE_session_ticket},
 648     {"renegotiation info", TLSEXT_TYPE_renegotiate},
 649     {"signed certificate timestamps", TLSEXT_TYPE_signed_certificate_timestamp},
 650     {"TLS padding", TLSEXT_TYPE_padding},
 651 #ifdef TLSEXT_TYPE_next_proto_neg
 652     {"next protocol", TLSEXT_TYPE_next_proto_neg},
 653 #endif
 654 #ifdef TLSEXT_TYPE_encrypt_then_mac
 655     {"encrypt-then-mac", TLSEXT_TYPE_encrypt_then_mac},
 656 #endif
 657 #ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
 658     {"application layer protocol negotiation",
 659      TLSEXT_TYPE_application_layer_protocol_negotiation},
 660 #endif
 661 #ifdef TLSEXT_TYPE_extended_master_secret
 662     {"extended master secret", TLSEXT_TYPE_extended_master_secret},
 663 #endif
 664     {"key share", TLSEXT_TYPE_key_share},
 665     {"supported versions", TLSEXT_TYPE_supported_versions},
 666     {"psk", TLSEXT_TYPE_psk},
 667     {"psk kex modes", TLSEXT_TYPE_psk_kex_modes},
 668     {"certificate authorities", TLSEXT_TYPE_certificate_authorities},
 669     {NULL}
 670 };
 671
 672 void tlsext_cb(SSL *s, int client_server, int type,
 673                const unsigned char *data, int len, void *arg)
 674 {
 675     BIO *bio = arg;
 676     const char *extname = lookup(type, tlsext_types, "unknown");
 677
 678     BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 679                client_server ? "server" : "client", extname, type, len);
 680     BIO_dump(bio, (const char *)data, len);
 681     (void)BIO_flush(bio);
 682 }
 683
 684 #ifndef OPENSSL_NO_SOCK
 685 int generate_cookie_callback(SSL *ssl, unsigned char *cookie,
 686                              unsigned int *cookie_len)
 687 {
 688     unsigned char *buffer;
 689     size_t length;
 690     unsigned short port;
 691     BIO_ADDR *peer = NULL;
 692
 693     /* Initialize a random secret */
 694     if (!cookie_initialized) {
 695         if (RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH) <= 0) {
 696             BIO_printf(bio_err, "error setting random cookie secret\n");
 697             return 0;
 698         }
 699         cookie_initialized = 1;
 700     }
 701
 702     peer = BIO_ADDR_new();
 703     if (peer == NULL) {
 704         BIO_printf(bio_err, "memory full\n");
 705         return 0;
 706     }
 707
 708     /* Read peer information */
 709     (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), peer);
 710
 711     /* Create buffer with peer's address and port */
 712     BIO_ADDR_rawaddress(peer, NULL, &length);
 713     OPENSSL_assert(length != 0);
 714     port = BIO_ADDR_rawport(peer);
 715     length += sizeof(port);
 716     buffer = app_malloc(length, "cookie generate buffer");
 717
 718     memcpy(buffer, &port, sizeof(port));
 719     BIO_ADDR_rawaddress(peer, buffer + sizeof(port), NULL);
 720
 721     /* Calculate HMAC of buffer using the secret */
 722     HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 723          buffer, length, cookie, cookie_len);
 724
 725     OPENSSL_free(buffer);
 726     BIO_ADDR_free(peer);
 727
 728     return 1;
 729 }
 730
 731 int verify_cookie_callback(SSL *ssl, const unsigned char *cookie,
 732                            unsigned int cookie_len)
 733 {
 734     unsigned char result[EVP_MAX_MD_SIZE];
 735     unsigned int resultlength;
 736
 737     /* Note: we check cookie_initialized because if it's not,
 738      * it cannot be valid */
 739     if (cookie_initialized
 740         && generate_cookie_callback(ssl, result, &resultlength)
 741         && cookie_len == resultlength
 742         && memcmp(result, cookie, resultlength) == 0)
 743         return 1;
 744
 745     return 0;
 746 }
 747 #endif
 748
 749 /*
 750  * Example of extended certificate handling. Where the standard support of
 751  * one certificate per algorithm is not sufficient an application can decide
 752  * which certificate(s) to use at runtime based on whatever criteria it deems
 753  * appropriate.
 754  */
 755
 756 /* Linked list of certificates, keys and chains */
 757 struct ssl_excert_st {
 758     int certform;
 759     const char *certfile;
 760     int keyform;
 761     const char *keyfile;
 762     const char *chainfile;
 763     X509 *cert;
 764     EVP_PKEY *key;
 765     STACK_OF(X509) *chain;
 766     int build_chain;
 767     struct ssl_excert_st *next, *prev;
 768 };
 769
 770 static STRINT_PAIR chain_flags[] = {
 771     {"Overall Validity", CERT_PKEY_VALID},
 772     {"Sign with EE key", CERT_PKEY_SIGN},
 773     {"EE signature", CERT_PKEY_EE_SIGNATURE},
 774     {"CA signature", CERT_PKEY_CA_SIGNATURE},
 775     {"EE key parameters", CERT_PKEY_EE_PARAM},
 776     {"CA key parameters", CERT_PKEY_CA_PARAM},
 777     {"Explicitly sign with EE key", CERT_PKEY_EXPLICIT_SIGN},
 778     {"Issuer Name", CERT_PKEY_ISSUER_NAME},
 779     {"Certificate Type", CERT_PKEY_CERT_TYPE},
 780     {NULL}
 781 };
 782
 783 static void print_chain_flags(SSL *s, int flags)
 784 {
 785     STRINT_PAIR *pp;
 786
 787     for (pp = chain_flags; pp->name; ++pp)
 788         BIO_printf(bio_err, "\t%s: %s\n",
 789                    pp->name,
 790                    (flags & pp->retval) ? "OK" : "NOT OK");
 791     BIO_printf(bio_err, "\tSuite B: ");
 792     if (SSL_set_cert_flags(s, 0) & SSL_CERT_FLAG_SUITEB_128_LOS)
 793         BIO_puts(bio_err, flags & CERT_PKEY_SUITEB ? "OK\n" : "NOT OK\n");
 794     else
 795         BIO_printf(bio_err, "not tested\n");
 796 }
 797
 798 /*
 799  * Very basic selection callback: just use any certificate chain reported as
 800  * valid. More sophisticated could prioritise according to local policy.
 801  */
 802 static int set_cert_cb(SSL *ssl, void *arg)
 803 {
 804     int i, rv;
 805     SSL_EXCERT *exc = arg;
 806 #ifdef CERT_CB_TEST_RETRY
 807     static int retry_cnt;
 808     if (retry_cnt < 5) {
 809         retry_cnt++;
 810         BIO_printf(bio_err,
 811                    "Certificate callback retry test: count %d\n",
 812                    retry_cnt);
 813         return -1;
 814     }
 815 #endif
 816     SSL_certs_clear(ssl);
 817
 818     if (exc == NULL)
 819         return 1;
 820
 821     /*
 822      * Go to end of list and traverse backwards since we prepend newer
 823      * entries this retains the original order.
 824      */
 825     while (exc->next != NULL)
 826         exc = exc->next;
 827
 828     i = 0;
 829
 830     while (exc != NULL) {
 831         i++;
 832         rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
 833         BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
 834         X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
 835                            get_nameopt());
 836         BIO_puts(bio_err, "\n");
 837         print_chain_flags(ssl, rv);
 838         if (rv & CERT_PKEY_VALID) {
 839             if (!SSL_use_certificate(ssl, exc->cert)
 840                     || !SSL_use_PrivateKey(ssl, exc->key)) {
 841                 return 0;
 842             }
 843             /*
 844              * NB: we wouldn't normally do this as it is not efficient
 845              * building chains on each connection better to cache the chain
 846              * in advance.
 847              */
 848             if (exc->build_chain) {
 849                 if (!SSL_build_cert_chain(ssl, 0))
 850                     return 0;
 851             } else if (exc->chain != NULL) {
 852                 SSL_set1_chain(ssl, exc->chain);
 853             }
 854         }
 855         exc = exc->prev;
 856     }
 857     return 1;
 858 }
 859
 860 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
 861 {
 862     SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
 863 }
 864
 865 static int ssl_excert_prepend(SSL_EXCERT **pexc)
 866 {
 867     SSL_EXCERT *exc = app_malloc(sizeof(*exc), "prepend cert");
 868
 869     memset(exc, 0, sizeof(*exc));
 870
 871     exc->next = *pexc;
 872     *pexc = exc;
 873
 874     if (exc->next) {
 875         exc->certform = exc->next->certform;
 876         exc->keyform = exc->next->keyform;
 877         exc->next->prev = exc;
 878     } else {
 879         exc->certform = FORMAT_PEM;
 880         exc->keyform = FORMAT_PEM;
 881     }
 882     return 1;
 883
 884 }
 885
 886 void ssl_excert_free(SSL_EXCERT *exc)
 887 {
 888     SSL_EXCERT *curr;
 889
 890     if (exc == NULL)
 891         return;
 892     while (exc) {
 893         X509_free(exc->cert);
 894         EVP_PKEY_free(exc->key);
 895         sk_X509_pop_free(exc->chain, X509_free);
 896         curr = exc;
 897         exc = exc->next;
 898         OPENSSL_free(curr);
 899     }
 900 }
 901
 902 int load_excert(SSL_EXCERT **pexc)
 903 {
 904     SSL_EXCERT *exc = *pexc;
 905     if (exc == NULL)
 906         return 1;
 907     /* If nothing in list, free and set to NULL */
 908     if (exc->certfile == NULL && exc->next == NULL) {
 909         ssl_excert_free(exc);
 910         *pexc = NULL;
 911         return 1;
 912     }
 913     for (; exc; exc = exc->next) {
 914         if (exc->certfile == NULL) {
 915             BIO_printf(bio_err, "Missing filename\n");
 916             return 0;
 917         }
 918         exc->cert = load_cert(exc->certfile, exc->certform,
 919                               "Server Certificate");
 920         if (exc->cert == NULL)
 921             return 0;
 922         if (exc->keyfile != NULL) {
 923             exc->key = load_key(exc->keyfile, exc->keyform,
 924                                 0, NULL, NULL, "Server Key");
 925         } else {
 926             exc->key = load_key(exc->certfile, exc->certform,
 927                                 0, NULL, NULL, "Server Key");
 928         }
 929         if (exc->key == NULL)
 930             return 0;
 931         if (exc->chainfile != NULL) {
 932             if (!load_certs(exc->chainfile, &exc->chain, FORMAT_PEM, NULL,
 933                             "Server Chain"))
 934                 return 0;
 935         }
 936     }
 937     return 1;
 938 }
 939
 940 enum range { OPT_X_ENUM };
 941
 942 int args_excert(int opt, SSL_EXCERT **pexc)
 943 {
 944     SSL_EXCERT *exc = *pexc;
 945
 946     assert(opt > OPT_X__FIRST);
 947     assert(opt < OPT_X__LAST);
 948
 949     if (exc == NULL) {
 950         if (!ssl_excert_prepend(&exc)) {
 951             BIO_printf(bio_err, " %s: Error initialising xcert\n",
 952                        opt_getprog());
 953             goto err;
 954         }
 955         *pexc = exc;
 956     }
 957
 958     switch ((enum range)opt) {
 959     case OPT_X__FIRST:
 960     case OPT_X__LAST:
 961         return 0;
 962     case OPT_X_CERT:
 963         if (exc->certfile != NULL && !ssl_excert_prepend(&exc)) {
 964             BIO_printf(bio_err, "%s: Error adding xcert\n", opt_getprog());
 965             goto err;
 966         }
 967         *pexc = exc;
 968         exc->certfile = opt_arg();
 969         break;
 970     case OPT_X_KEY:
 971         if (exc->keyfile != NULL) {
 972             BIO_printf(bio_err, "%s: Key already specified\n", opt_getprog());
 973             goto err;
 974         }
 975         exc->keyfile = opt_arg();
 976         break;
 977     case OPT_X_CHAIN:
 978         if (exc->chainfile != NULL) {
 979             BIO_printf(bio_err, "%s: Chain already specified\n",
 980                        opt_getprog());
 981             goto err;
 982         }
 983         exc->chainfile = opt_arg();
 984         break;
 985     case OPT_X_CHAIN_BUILD:
 986         exc->build_chain = 1;
 987         break;
 988     case OPT_X_CERTFORM:
 989         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->certform))
 990             return 0;
 991         break;
 992     case OPT_X_KEYFORM:
 993         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->keyform))
 994             return 0;
 995         break;
 996     }
 997     return 1;
 998
 999  err:
1000     ERR_print_errors(bio_err);
1001     ssl_excert_free(exc);
1002     *pexc = NULL;
1003     return 0;
1004 }
1005
1006 static void print_raw_cipherlist(SSL *s)
1007 {
1008     const unsigned char *rlist;
1009     static const unsigned char scsv_id[] = { 0, 0xFF };
1010     size_t i, rlistlen, num;
1011     if (!SSL_is_server(s))
1012         return;
1013     num = SSL_get0_raw_cipherlist(s, NULL);
1014     OPENSSL_assert(num == 2);
1015     rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
1016     BIO_puts(bio_err, "Client cipher list: ");
1017     for (i = 0; i < rlistlen; i += num, rlist += num) {
1018         const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
1019         if (i)
1020             BIO_puts(bio_err, ":");
1021         if (c != NULL) {
1022             BIO_puts(bio_err, SSL_CIPHER_get_name(c));
1023         } else if (memcmp(rlist, scsv_id, num) == 0) {
1024             BIO_puts(bio_err, "SCSV");
1025         } else {
1026             size_t j;
1027             BIO_puts(bio_err, "0x");
1028             for (j = 0; j < num; j++)
1029                 BIO_printf(bio_err, "%02X", rlist[j]);
1030         }
1031     }
1032     BIO_puts(bio_err, "\n");
1033 }
1034
1035 /*
1036  * Hex encoder for TLSA RRdata, not ':' delimited.
1037  */
1038 static char *hexencode(const unsigned char *data, size_t len)
1039 {
1040     static const char *hex = "0123456789abcdef";
1041     char *out;
1042     char *cp;
1043     size_t outlen = 2 * len + 1;
1044     int ilen = (int) outlen;
1045
1046     if (outlen < len || ilen < 0 || outlen != (size_t)ilen) {
1047         BIO_printf(bio_err, "%s: %zu-byte buffer too large to hexencode\n",
1048                    opt_getprog(), len);
1049         exit(1);
1050     }
1051     cp = out = app_malloc(ilen, "TLSA hex data buffer");
1052
1053     while (len-- > 0) {
1054         *cp++ = hex[(*data >> 4) & 0x0f];
1055         *cp++ = hex[*data++ & 0x0f];
1056     }
1057     *cp = '\0';
1058     return out;
1059 }
1060
1061 void print_verify_detail(SSL *s, BIO *bio)
1062 {
1063     int mdpth;
1064     EVP_PKEY *mspki;
1065     long verify_err = SSL_get_verify_result(s);
1066
1067     if (verify_err == X509_V_OK) {
1068         const char *peername = SSL_get0_peername(s);
1069
1070         BIO_printf(bio, "Verification: OK\n");
1071         if (peername != NULL)
1072             BIO_printf(bio, "Verified peername: %s\n", peername);
1073     } else {
1074         const char *reason = X509_verify_cert_error_string(verify_err);
1075
1076         BIO_printf(bio, "Verification error: %s\n", reason);
1077     }
1078
1079     if ((mdpth = SSL_get0_dane_authority(s, NULL, &mspki)) >= 0) {
1080         uint8_t usage, selector, mtype;
1081         const unsigned char *data = NULL;
1082         size_t dlen = 0;
1083         char *hexdata;
1084
1085         mdpth = SSL_get0_dane_tlsa(s, &usage, &selector, &mtype, &data, &dlen);
1086
1087         /*
1088          * The TLSA data field can be quite long when it is a certificate,
1089          * public key or even a SHA2-512 digest.  Because the initial octets of
1090          * ASN.1 certificates and public keys contain mostly boilerplate OIDs
1091          * and lengths, we show the last 12 bytes of the data instead, as these
1092          * are more likely to distinguish distinct TLSA records.
1093          */
1094 #define TLSA_TAIL_SIZE 12
1095         if (dlen > TLSA_TAIL_SIZE)
1096             hexdata = hexencode(data + dlen - TLSA_TAIL_SIZE, TLSA_TAIL_SIZE);
1097         else
1098             hexdata = hexencode(data, dlen);
1099         BIO_printf(bio, "DANE TLSA %d %d %d %s%s %s at depth %d\n",
1100                    usage, selector, mtype,
1101                    (dlen > TLSA_TAIL_SIZE) ? "..." : "", hexdata,
1102                    (mspki != NULL) ? "signed the certificate" :
1103                    mdpth ? "matched TA certificate" : "matched EE certificate",
1104                    mdpth);
1105         OPENSSL_free(hexdata);
1106     }
1107 }
1108
1109 void print_ssl_summary(SSL *s)
1110 {
1111     const SSL_CIPHER *c;
1112     X509 *peer;
1113
1114     BIO_printf(bio_err, "Protocol version: %s\n", SSL_get_version(s));
1115     print_raw_cipherlist(s);
1116     c = SSL_get_current_cipher(s);
1117     BIO_printf(bio_err, "Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
1118     do_print_sigalgs(bio_err, s, 0);
1119     peer = SSL_get_peer_certificate(s);
1120     if (peer != NULL) {
1121         int nid;
1122
1123         BIO_puts(bio_err, "Peer certificate: ");
1124         X509_NAME_print_ex(bio_err, X509_get_subject_name(peer),
1125                            0, get_nameopt());
1126         BIO_puts(bio_err, "\n");
1127         if (SSL_get_peer_signature_nid(s, &nid))
1128             BIO_printf(bio_err, "Hash used: %s\n", OBJ_nid2sn(nid));
1129         if (SSL_get_peer_signature_type_nid(s, &nid))
1130             BIO_printf(bio_err, "Signature type: %s\n", get_sigtype(nid));
1131         print_verify_detail(s, bio_err);
1132     } else {
1133         BIO_puts(bio_err, "No peer certificate\n");
1134     }
1135     X509_free(peer);
1136 #ifndef OPENSSL_NO_EC
1137     ssl_print_point_formats(bio_err, s);
1138     if (SSL_is_server(s))
1139         ssl_print_groups(bio_err, s, 1);
1140     else
1141         ssl_print_tmp_key(bio_err, s);
1142 #else
1143     if (!SSL_is_server(s))
1144         ssl_print_tmp_key(bio_err, s);
1145 #endif
1146 }
1147
1148 int config_ctx(SSL_CONF_CTX *cctx, STACK_OF(OPENSSL_STRING) *str,
1149                SSL_CTX *ctx)
1150 {
1151     int i;
1152
1153     SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
1154     for (i = 0; i < sk_OPENSSL_STRING_num(str); i += 2) {
1155         const char *flag = sk_OPENSSL_STRING_value(str, i);
1156         const char *arg = sk_OPENSSL_STRING_value(str, i + 1);
1157         if (SSL_CONF_cmd(cctx, flag, arg) <= 0) {
1158             if (arg != NULL)
1159                 BIO_printf(bio_err, "Error with command: \"%s %s\"\n",
1160                            flag, arg);
1161             else
1162                 BIO_printf(bio_err, "Error with command: \"%s\"\n", flag);
1163             ERR_print_errors(bio_err);
1164             return 0;
1165         }
1166     }
1167     if (!SSL_CONF_CTX_finish(cctx)) {
1168         BIO_puts(bio_err, "Error finishing context\n");
1169         ERR_print_errors(bio_err);
1170         return 0;
1171     }
1172     return 1;
1173 }
1174
1175 static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
1176 {
1177     X509_CRL *crl;
1178     int i;
1179     for (i = 0; i < sk_X509_CRL_num(crls); i++) {
1180         crl = sk_X509_CRL_value(crls, i);
1181         X509_STORE_add_crl(st, crl);
1182     }
1183     return 1;
1184 }
1185
1186 int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls, int crl_download)
1187 {
1188     X509_STORE *st;
1189     st = SSL_CTX_get_cert_store(ctx);
1190     add_crls_store(st, crls);
1191     if (crl_download)
1192         store_setup_crl_download(st);
1193     return 1;
1194 }
1195
1196 int ssl_load_stores(SSL_CTX *ctx,
1197                     const char *vfyCApath, const char *vfyCAfile,
1198                     const char *chCApath, const char *chCAfile,
1199                     STACK_OF(X509_CRL) *crls, int crl_download)
1200 {
1201     X509_STORE *vfy = NULL, *ch = NULL;
1202     int rv = 0;
1203     if (vfyCApath != NULL || vfyCAfile != NULL) {
1204         vfy = X509_STORE_new();
1205         if (vfy == NULL)
1206             goto err;
1207         if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
1208             goto err;
1209         add_crls_store(vfy, crls);
1210         SSL_CTX_set1_verify_cert_store(ctx, vfy);
1211         if (crl_download)
1212             store_setup_crl_download(vfy);
1213     }
1214     if (chCApath != NULL || chCAfile != NULL) {
1215         ch = X509_STORE_new();
1216         if (ch == NULL)
1217             goto err;
1218         if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
1219             goto err;
1220         SSL_CTX_set1_chain_cert_store(ctx, ch);
1221     }
1222     rv = 1;
1223  err:
1224     X509_STORE_free(vfy);
1225     X509_STORE_free(ch);
1226     return rv;
1227 }
1228
1229 /* Verbose print out of security callback */
1230
1231 typedef struct {
1232     BIO *out;
1233     int verbose;
1234     int (*old_cb) (const SSL *s, const SSL_CTX *ctx, int op, int bits, int nid,
1235                    void *other, void *ex);
1236 } security_debug_ex;
1237
1238 static STRINT_PAIR callback_types[] = {
1239     {"Supported Ciphersuite", SSL_SECOP_CIPHER_SUPPORTED},
1240     {"Shared Ciphersuite", SSL_SECOP_CIPHER_SHARED},
1241     {"Check Ciphersuite", SSL_SECOP_CIPHER_CHECK},
1242 #ifndef OPENSSL_NO_DH
1243     {"Temp DH key bits", SSL_SECOP_TMP_DH},
1244 #endif
1245     {"Supported Curve", SSL_SECOP_CURVE_SUPPORTED},
1246     {"Shared Curve", SSL_SECOP_CURVE_SHARED},
1247     {"Check Curve", SSL_SECOP_CURVE_CHECK},
1248     {"Supported Signature Algorithm digest", SSL_SECOP_SIGALG_SUPPORTED},
1249     {"Shared Signature Algorithm digest", SSL_SECOP_SIGALG_SHARED},
1250     {"Check Signature Algorithm digest", SSL_SECOP_SIGALG_CHECK},
1251     {"Signature Algorithm mask", SSL_SECOP_SIGALG_MASK},
1252     {"Certificate chain EE key", SSL_SECOP_EE_KEY},
1253     {"Certificate chain CA key", SSL_SECOP_CA_KEY},
1254     {"Peer Chain EE key", SSL_SECOP_PEER_EE_KEY},
1255     {"Peer Chain CA key", SSL_SECOP_PEER_CA_KEY},
1256     {"Certificate chain CA digest", SSL_SECOP_CA_MD},
1257     {"Peer chain CA digest", SSL_SECOP_PEER_CA_MD},
1258     {"SSL compression", SSL_SECOP_COMPRESSION},
1259     {"Session ticket", SSL_SECOP_TICKET},
1260     {NULL}
1261 };
1262
1263 static int security_callback_debug(const SSL *s, const SSL_CTX *ctx,
1264                                    int op, int bits, int nid,
1265                                    void *other, void *ex)
1266 {
1267     security_debug_ex *sdb = ex;
1268     int rv, show_bits = 1, cert_md = 0;
1269     const char *nm;
1270     rv = sdb->old_cb(s, ctx, op, bits, nid, other, ex);
1271     if (rv == 1 && sdb->verbose < 2)
1272         return 1;
1273     BIO_puts(sdb->out, "Security callback: ");
1274
1275     nm = lookup(op, callback_types, NULL);
1276     switch (op) {
1277     case SSL_SECOP_TICKET:
1278     case SSL_SECOP_COMPRESSION:
1279         show_bits = 0;
1280         nm = NULL;
1281         break;
1282     case SSL_SECOP_VERSION:
1283         BIO_printf(sdb->out, "Version=%s", lookup(nid, ssl_versions, "???"));
1284         show_bits = 0;
1285         nm = NULL;
1286         break;
1287     case SSL_SECOP_CA_MD:
1288     case SSL_SECOP_PEER_CA_MD:
1289         cert_md = 1;
1290         break;
1291     }
1292     if (nm != NULL)
1293         BIO_printf(sdb->out, "%s=", nm);
1294
1295     switch (op & SSL_SECOP_OTHER_TYPE) {
1296
1297     case SSL_SECOP_OTHER_CIPHER:
1298         BIO_puts(sdb->out, SSL_CIPHER_get_name(other));
1299         break;
1300
1301 #ifndef OPENSSL_NO_EC
1302     case SSL_SECOP_OTHER_CURVE:
1303         {
1304             const char *cname;
1305             cname = EC_curve_nid2nist(nid);
1306             if (cname == NULL)
1307                 cname = OBJ_nid2sn(nid);
1308             BIO_puts(sdb->out, cname);
1309         }
1310         break;
1311 #endif
1312 #ifndef OPENSSL_NO_DH
1313     case SSL_SECOP_OTHER_DH:
1314         {
1315             DH *dh = other;
1316             BIO_printf(sdb->out, "%d", DH_bits(dh));
1317             break;
1318         }
1319 #endif
1320     case SSL_SECOP_OTHER_CERT:
1321         {
1322             if (cert_md) {
1323                 int sig_nid = X509_get_signature_nid(other);
1324                 BIO_puts(sdb->out, OBJ_nid2sn(sig_nid));
1325             } else {
1326                 EVP_PKEY *pkey = X509_get0_pubkey(other);
1327                 const char *algname = "";
1328                 EVP_PKEY_asn1_get0_info(NULL, NULL, NULL, NULL,
1329                                         &algname, EVP_PKEY_get0_asn1(pkey));
1330                 BIO_printf(sdb->out, "%s, bits=%d",
1331                            algname, EVP_PKEY_bits(pkey));
1332             }
1333             break;
1334         }
1335     case SSL_SECOP_OTHER_SIGALG:
1336         {
1337             const unsigned char *salg = other;
1338             const char *sname = NULL;
1339             switch (salg[1]) {
1340             case TLSEXT_signature_anonymous:
1341                 sname = "anonymous";
1342                 break;
1343             case TLSEXT_signature_rsa:
1344                 sname = "RSA";
1345                 break;
1346             case TLSEXT_signature_dsa:
1347                 sname = "DSA";
1348                 break;
1349             case TLSEXT_signature_ecdsa:
1350                 sname = "ECDSA";
1351                 break;
1352             }
1353
1354             BIO_puts(sdb->out, OBJ_nid2sn(nid));
1355             if (sname)
1356                 BIO_printf(sdb->out, ", algorithm=%s", sname);
1357             else
1358                 BIO_printf(sdb->out, ", algid=%d", salg[1]);
1359             break;
1360         }
1361
1362     }
1363
1364     if (show_bits)
1365         BIO_printf(sdb->out, ", security bits=%d", bits);
1366     BIO_printf(sdb->out, ": %s\n", rv ? "yes" : "no");
1367     return rv;
1368 }
1369
1370 void ssl_ctx_security_debug(SSL_CTX *ctx, int verbose)
1371 {
1372     static security_debug_ex sdb;
1373
1374     sdb.out = bio_err;
1375     sdb.verbose = verbose;
1376     sdb.old_cb = SSL_CTX_get_security_callback(ctx);
1377     SSL_CTX_set_security_callback(ctx, security_callback_debug);
1378     SSL_CTX_set0_security_ex_data(ctx, &sdb);
1379 }
1380
1381 static void keylog_callback(const SSL *ssl, const char *line)
1382 {
1383     if (bio_keylog == NULL) {
1384         BIO_printf(bio_err, "Keylog callback is invoked without valid file!\n");
1385         return;
1386     }
1387
1388     /*
1389      * There might be concurrent writers to the keylog file, so we must ensure
1390      * that the given line is written at once.
1391      */
1392     BIO_printf(bio_keylog, "%s\n", line);
1393     (void)BIO_flush(bio_keylog);
1394 }
1395
1396 int set_keylog_file(SSL_CTX *ctx, const char *keylog_file)
1397 {
1398     /* Close any open files */
1399     BIO_free_all(bio_keylog);
1400     bio_keylog = NULL;
1401
1402     if (ctx == NULL || keylog_file == NULL) {
1403         /* Keylogging is disabled, OK. */
1404         return 0;
1405     }
1406
1407     /*
1408      * Append rather than write in order to allow concurrent modification.
1409      * Furthermore, this preserves existing keylog files which is useful when
1410      * the tool is run multiple times.
1411      */
1412     bio_keylog = BIO_new_file(keylog_file, "a");
1413     if (bio_keylog == NULL) {
1414         BIO_printf(bio_err, "Error writing keylog file %s\n", keylog_file);
1415         return 1;
1416     }
1417
1418     /* Write a header for seekable, empty files (this excludes pipes). */
1419     if (BIO_tell(bio_keylog) == 0) {
1420         BIO_puts(bio_keylog,
1421                  "# SSL/TLS secrets log file, generated by OpenSSL\n");
1422         (void)BIO_flush(bio_keylog);
1423     }
1424     SSL_CTX_set_keylog_callback(ctx, keylog_callback);
1425     return 0;
1426 }
1427
1428 void print_ca_names(BIO *bio, SSL *s)
1429 {
1430     const char *cs = SSL_is_server(s) ? "server" : "client";
1431     const STACK_OF(X509_NAME) *sk = SSL_get0_peer_CA_list(s);
1432     int i;
1433
1434     if (sk == NULL || sk_X509_NAME_num(sk) == 0) {
1435         BIO_printf(bio, "---\nNo %s certificate CA names sent\n", cs);
1436         return;
1437     }
1438
1439     BIO_printf(bio, "---\nAcceptable %s certificate CA names\n",cs);
1440     for (i = 0; i < sk_X509_NAME_num(sk); i++) {
1441         X509_NAME_print_ex(bio, sk_X509_NAME_value(sk, i), 0, get_nameopt());
1442         BIO_write(bio, "\n", 1);
1443     }
1444 }