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      case NID_ED25519:
 234         return "Ed25519";
 235
 236     default:
 237         return NULL;
 238     }
 239 }
 240
 241 static int do_print_sigalgs(BIO *out, SSL *s, int shared)
 242 {
 243     int i, nsig, client;
 244     client = SSL_is_server(s) ? 0 : 1;
 245     if (shared)
 246         nsig = SSL_get_shared_sigalgs(s, 0, NULL, NULL, NULL, NULL, NULL);
 247     else
 248         nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 249     if (nsig == 0)
 250         return 1;
 251
 252     if (shared)
 253         BIO_puts(out, "Shared ");
 254
 255     if (client)
 256         BIO_puts(out, "Requested ");
 257     BIO_puts(out, "Signature Algorithms: ");
 258     for (i = 0; i < nsig; i++) {
 259         int hash_nid, sign_nid;
 260         unsigned char rhash, rsign;
 261         const char *sstr = NULL;
 262         if (shared)
 263             SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 264                                    &rsign, &rhash);
 265         else
 266             SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL, &rsign, &rhash);
 267         if (i)
 268             BIO_puts(out, ":");
 269         sstr = get_sigtype(sign_nid);
 270         if (sstr)
 271             BIO_printf(out, "%s", sstr);
 272         else
 273             BIO_printf(out, "0x%02X", (int)rsign);
 274         if (hash_nid != NID_undef)
 275             BIO_printf(out, "+%s", OBJ_nid2sn(hash_nid));
 276         else if (sstr == NULL)
 277             BIO_printf(out, "+0x%02X", (int)rhash);
 278     }
 279     BIO_puts(out, "\n");
 280     return 1;
 281 }
 282
 283 int ssl_print_sigalgs(BIO *out, SSL *s)
 284 {
 285     int nid;
 286     if (!SSL_is_server(s))
 287         ssl_print_client_cert_types(out, s);
 288     do_print_sigalgs(out, s, 0);
 289     do_print_sigalgs(out, s, 1);
 290     if (SSL_get_peer_signature_nid(s, &nid) && nid != NID_undef)
 291         BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(nid));
 292     if (SSL_get_peer_signature_type_nid(s, &nid))
 293         BIO_printf(out, "Peer signature type: %s\n", get_sigtype(nid));
 294     return 1;
 295 }
 296
 297 #ifndef OPENSSL_NO_EC
 298 int ssl_print_point_formats(BIO *out, SSL *s)
 299 {
 300     int i, nformats;
 301     const char *pformats;
 302     nformats = SSL_get0_ec_point_formats(s, &pformats);
 303     if (nformats <= 0)
 304         return 1;
 305     BIO_puts(out, "Supported Elliptic Curve Point Formats: ");
 306     for (i = 0; i < nformats; i++, pformats++) {
 307         if (i)
 308             BIO_puts(out, ":");
 309         switch (*pformats) {
 310         case TLSEXT_ECPOINTFORMAT_uncompressed:
 311             BIO_puts(out, "uncompressed");
 312             break;
 313
 314         case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime:
 315             BIO_puts(out, "ansiX962_compressed_prime");
 316             break;
 317
 318         case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2:
 319             BIO_puts(out, "ansiX962_compressed_char2");
 320             break;
 321
 322         default:
 323             BIO_printf(out, "unknown(%d)", (int)*pformats);
 324             break;
 325
 326         }
 327     }
 328     BIO_puts(out, "\n");
 329     return 1;
 330 }
 331
 332 int ssl_print_groups(BIO *out, SSL *s, int noshared)
 333 {
 334     int i, ngroups, *groups, nid;
 335     const char *gname;
 336
 337     ngroups = SSL_get1_groups(s, NULL);
 338     if (ngroups <= 0)
 339         return 1;
 340     groups = app_malloc(ngroups * sizeof(int), "groups to print");
 341     SSL_get1_groups(s, groups);
 342
 343     BIO_puts(out, "Supported Elliptic Groups: ");
 344     for (i = 0; i < ngroups; i++) {
 345         if (i)
 346             BIO_puts(out, ":");
 347         nid = groups[i];
 348         /* If unrecognised print out hex version */
 349         if (nid & TLSEXT_nid_unknown) {
 350             BIO_printf(out, "0x%04X", nid & 0xFFFF);
 351         } else {
 352             /* TODO(TLS1.3): Get group name here */
 353             /* Use NIST name for curve if it exists */
 354             gname = EC_curve_nid2nist(nid);
 355             if (gname == NULL)
 356                 gname = OBJ_nid2sn(nid);
 357             BIO_printf(out, "%s", gname);
 358         }
 359     }
 360     OPENSSL_free(groups);
 361     if (noshared) {
 362         BIO_puts(out, "\n");
 363         return 1;
 364     }
 365     BIO_puts(out, "\nShared Elliptic groups: ");
 366     ngroups = SSL_get_shared_group(s, -1);
 367     for (i = 0; i < ngroups; i++) {
 368         if (i)
 369             BIO_puts(out, ":");
 370         nid = SSL_get_shared_group(s, i);
 371         /* TODO(TLS1.3): Convert for DH groups */
 372         gname = EC_curve_nid2nist(nid);
 373         if (gname == NULL)
 374             gname = OBJ_nid2sn(nid);
 375         BIO_printf(out, "%s", gname);
 376     }
 377     if (ngroups == 0)
 378         BIO_puts(out, "NONE");
 379     BIO_puts(out, "\n");
 380     return 1;
 381 }
 382 #endif
 383
 384 int ssl_print_tmp_key(BIO *out, SSL *s)
 385 {
 386     EVP_PKEY *key;
 387     if (!SSL_get_server_tmp_key(s, &key))
 388         return 1;
 389     BIO_puts(out, "Server Temp Key: ");
 390     switch (EVP_PKEY_id(key)) {
 391     case EVP_PKEY_RSA:
 392         BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
 393         break;
 394
 395     case EVP_PKEY_DH:
 396         BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
 397         break;
 398 #ifndef OPENSSL_NO_EC
 399     case EVP_PKEY_EC:
 400         {
 401             EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
 402             int nid;
 403             const char *cname;
 404             nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 405             EC_KEY_free(ec);
 406             cname = EC_curve_nid2nist(nid);
 407             if (cname == NULL)
 408                 cname = OBJ_nid2sn(nid);
 409             BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(key));
 410         }
 411     break;
 412 #endif
 413     default:
 414         BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(key)),
 415                    EVP_PKEY_bits(key));
 416     }
 417     EVP_PKEY_free(key);
 418     return 1;
 419 }
 420
 421 long bio_dump_callback(BIO *bio, int cmd, const char *argp,
 422                        int argi, long argl, long ret)
 423 {
 424     BIO *out;
 425
 426     out = (BIO *)BIO_get_callback_arg(bio);
 427     if (out == NULL)
 428         return (ret);
 429
 430     if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
 431         BIO_printf(out, "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 432                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 433         BIO_dump(out, argp, (int)ret);
 434         return (ret);
 435     } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
 436         BIO_printf(out, "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 437                    (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
 438         BIO_dump(out, argp, (int)ret);
 439     }
 440     return (ret);
 441 }
 442
 443 void apps_ssl_info_callback(const SSL *s, int where, int ret)
 444 {
 445     const char *str;
 446     int w;
 447
 448     w = where & ~SSL_ST_MASK;
 449
 450     if (w & SSL_ST_CONNECT)
 451         str = "SSL_connect";
 452     else if (w & SSL_ST_ACCEPT)
 453         str = "SSL_accept";
 454     else
 455         str = "undefined";
 456
 457     if (where & SSL_CB_LOOP) {
 458         BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
 459     } else if (where & SSL_CB_ALERT) {
 460         str = (where & SSL_CB_READ) ? "read" : "write";
 461         BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n",
 462                    str,
 463                    SSL_alert_type_string_long(ret),
 464                    SSL_alert_desc_string_long(ret));
 465     } else if (where & SSL_CB_EXIT) {
 466         if (ret == 0)
 467             BIO_printf(bio_err, "%s:failed in %s\n",
 468                        str, SSL_state_string_long(s));
 469         else if (ret < 0)
 470             BIO_printf(bio_err, "%s:error in %s\n",
 471                        str, SSL_state_string_long(s));
 472     }
 473 }
 474
 475 static STRINT_PAIR ssl_versions[] = {
 476     {"SSL 3.0", SSL3_VERSION},
 477     {"TLS 1.0", TLS1_VERSION},
 478     {"TLS 1.1", TLS1_1_VERSION},
 479     {"TLS 1.2", TLS1_2_VERSION},
 480     {"TLS 1.3", TLS1_3_VERSION},
 481     {"DTLS 1.0", DTLS1_VERSION},
 482     {"DTLS 1.0 (bad)", DTLS1_BAD_VER},
 483     {NULL}
 484 };
 485
 486 static STRINT_PAIR alert_types[] = {
 487     {" close_notify", 0},
 488     {" end_of_early_data", 1},
 489     {" unexpected_message", 10},
 490     {" bad_record_mac", 20},
 491     {" decryption_failed", 21},
 492     {" record_overflow", 22},
 493     {" decompression_failure", 30},
 494     {" handshake_failure", 40},
 495     {" bad_certificate", 42},
 496     {" unsupported_certificate", 43},
 497     {" certificate_revoked", 44},
 498     {" certificate_expired", 45},
 499     {" certificate_unknown", 46},
 500     {" illegal_parameter", 47},
 501     {" unknown_ca", 48},
 502     {" access_denied", 49},
 503     {" decode_error", 50},
 504     {" decrypt_error", 51},
 505     {" export_restriction", 60},
 506     {" protocol_version", 70},
 507     {" insufficient_security", 71},
 508     {" internal_error", 80},
 509     {" inappropriate_fallback", 86},
 510     {" user_canceled", 90},
 511     {" no_renegotiation", 100},
 512     {" missing_extension", 109},
 513     {" unsupported_extension", 110},
 514     {" certificate_unobtainable", 111},
 515     {" unrecognized_name", 112},
 516     {" bad_certificate_status_response", 113},
 517     {" bad_certificate_hash_value", 114},
 518     {" unknown_psk_identity", 115},
 519     {" certificate_required", 116},
 520     {NULL}
 521 };
 522
 523 static STRINT_PAIR handshakes[] = {
 524     {", HelloRequest", SSL3_MT_HELLO_REQUEST},
 525     {", ClientHello", SSL3_MT_CLIENT_HELLO},
 526     {", ServerHello", SSL3_MT_SERVER_HELLO},
 527     {", HelloVerifyRequest", DTLS1_MT_HELLO_VERIFY_REQUEST},
 528     {", NewSessionTicket", SSL3_MT_NEWSESSION_TICKET},
 529     {", EndOfEarlyData", SSL3_MT_END_OF_EARLY_DATA},
 530     {", HelloRetryRequest", SSL3_MT_HELLO_RETRY_REQUEST},
 531     {", EncryptedExtensions", SSL3_MT_ENCRYPTED_EXTENSIONS},
 532     {", Certificate", SSL3_MT_CERTIFICATE},
 533     {", ServerKeyExchange", SSL3_MT_SERVER_KEY_EXCHANGE},
 534     {", CertificateRequest", SSL3_MT_CERTIFICATE_REQUEST},
 535     {", ServerHelloDone", SSL3_MT_SERVER_DONE},
 536     {", CertificateVerify", SSL3_MT_CERTIFICATE_VERIFY},
 537     {", ClientKeyExchange", SSL3_MT_CLIENT_KEY_EXCHANGE},
 538     {", Finished", SSL3_MT_FINISHED},
 539     {", CertificateUrl", 21},
 540     {", CertificateStatus", SSL3_MT_CERTIFICATE_STATUS},
 541     {", SupplementalData", 23},
 542     {", KeyUpdate", SSL3_MT_KEY_UPDATE},
 543 #ifndef OPENSSL_NO_NEXTPROTONEG
 544     {", NextProto", SSL3_MT_NEXT_PROTO},
 545 #endif
 546     {", MessageHash", SSL3_MT_MESSAGE_HASH},
 547     {NULL}
 548 };
 549
 550 void msg_cb(int write_p, int version, int content_type, const void *buf,
 551             size_t len, SSL *ssl, void *arg)
 552 {
 553     BIO *bio = arg;
 554     const char *str_write_p = write_p ? ">>>" : "<<<";
 555     const char *str_version = lookup(version, ssl_versions, "???");
 556     const char *str_content_type = "", *str_details1 = "", *str_details2 = "";
 557     const unsigned char* bp = buf;
 558
 559     if (version == SSL3_VERSION ||
 560         version == TLS1_VERSION ||
 561         version == TLS1_1_VERSION ||
 562         version == TLS1_2_VERSION ||
 563         version == TLS1_3_VERSION ||
 564         version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
 565         switch (content_type) {
 566         case 20:
 567             str_content_type = ", ChangeCipherSpec";
 568             break;
 569         case 21:
 570             str_content_type = ", Alert";
 571             str_details1 = ", ???";
 572             if (len == 2) {
 573                 switch (bp[0]) {
 574                 case 1:
 575                     str_details1 = ", warning";
 576                     break;
 577                 case 2:
 578                     str_details1 = ", fatal";
 579                     break;
 580                 }
 581                 str_details2 = lookup((int)bp[1], alert_types, " ???");
 582             }
 583             break;
 584         case 22:
 585             str_content_type = ", Handshake";
 586             str_details1 = "???";
 587             if (len > 0)
 588                 str_details1 = lookup((int)bp[0], handshakes, "???");
 589             break;
 590         case 23:
 591             str_content_type = ", ApplicationData";
 592             break;
 593 #ifndef OPENSSL_NO_HEARTBEATS
 594         case 24:
 595             str_details1 = ", Heartbeat";
 596
 597             if (len > 0) {
 598                 switch (bp[0]) {
 599                 case 1:
 600                     str_details1 = ", HeartbeatRequest";
 601                     break;
 602                 case 2:
 603                     str_details1 = ", HeartbeatResponse";
 604                     break;
 605                 }
 606             }
 607             break;
 608 #endif
 609         }
 610     }
 611
 612     BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version,
 613                str_content_type, (unsigned long)len, str_details1,
 614                str_details2);
 615
 616     if (len > 0) {
 617         size_t num, i;
 618
 619         BIO_printf(bio, "   ");
 620         num = len;
 621         for (i = 0; i < num; i++) {
 622             if (i % 16 == 0 && i > 0)
 623                 BIO_printf(bio, "\n   ");
 624             BIO_printf(bio, " %02x", ((const unsigned char *)buf)[i]);
 625         }
 626         if (i < len)
 627             BIO_printf(bio, " ...");
 628         BIO_printf(bio, "\n");
 629     }
 630     (void)BIO_flush(bio);
 631 }
 632
 633 static STRINT_PAIR tlsext_types[] = {
 634     {"server name", TLSEXT_TYPE_server_name},
 635     {"max fragment length", TLSEXT_TYPE_max_fragment_length},
 636     {"client certificate URL", TLSEXT_TYPE_client_certificate_url},
 637     {"trusted CA keys", TLSEXT_TYPE_trusted_ca_keys},
 638     {"truncated HMAC", TLSEXT_TYPE_truncated_hmac},
 639     {"status request", TLSEXT_TYPE_status_request},
 640     {"user mapping", TLSEXT_TYPE_user_mapping},
 641     {"client authz", TLSEXT_TYPE_client_authz},
 642     {"server authz", TLSEXT_TYPE_server_authz},
 643     {"cert type", TLSEXT_TYPE_cert_type},
 644     {"supported_groups", TLSEXT_TYPE_supported_groups},
 645     {"EC point formats", TLSEXT_TYPE_ec_point_formats},
 646     {"SRP", TLSEXT_TYPE_srp},
 647     {"signature algorithms", TLSEXT_TYPE_signature_algorithms},
 648     {"use SRTP", TLSEXT_TYPE_use_srtp},
 649     {"heartbeat", TLSEXT_TYPE_heartbeat},
 650     {"session ticket", TLSEXT_TYPE_session_ticket},
 651     {"renegotiation info", TLSEXT_TYPE_renegotiate},
 652     {"signed certificate timestamps", TLSEXT_TYPE_signed_certificate_timestamp},
 653     {"TLS padding", TLSEXT_TYPE_padding},
 654 #ifdef TLSEXT_TYPE_next_proto_neg
 655     {"next protocol", TLSEXT_TYPE_next_proto_neg},
 656 #endif
 657 #ifdef TLSEXT_TYPE_encrypt_then_mac
 658     {"encrypt-then-mac", TLSEXT_TYPE_encrypt_then_mac},
 659 #endif
 660 #ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
 661     {"application layer protocol negotiation",
 662      TLSEXT_TYPE_application_layer_protocol_negotiation},
 663 #endif
 664 #ifdef TLSEXT_TYPE_extended_master_secret
 665     {"extended master secret", TLSEXT_TYPE_extended_master_secret},
 666 #endif
 667     {"key share", TLSEXT_TYPE_key_share},
 668     {"supported versions", TLSEXT_TYPE_supported_versions},
 669     {"psk", TLSEXT_TYPE_psk},
 670     {"psk kex modes", TLSEXT_TYPE_psk_kex_modes},
 671     {"certificate authorities", TLSEXT_TYPE_certificate_authorities},
 672     {NULL}
 673 };
 674
 675 void tlsext_cb(SSL *s, int client_server, int type,
 676                const unsigned char *data, int len, void *arg)
 677 {
 678     BIO *bio = arg;
 679     const char *extname = lookup(type, tlsext_types, "unknown");
 680
 681     BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 682                client_server ? "server" : "client", extname, type, len);
 683     BIO_dump(bio, (const char *)data, len);
 684     (void)BIO_flush(bio);
 685 }
 686
 687 #ifndef OPENSSL_NO_SOCK
 688 int generate_cookie_callback(SSL *ssl, unsigned char *cookie,
 689                              unsigned int *cookie_len)
 690 {
 691     unsigned char *buffer;
 692     size_t length;
 693     unsigned short port;
 694     BIO_ADDR *peer = NULL;
 695
 696     /* Initialize a random secret */
 697     if (!cookie_initialized) {
 698         if (RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH) <= 0) {
 699             BIO_printf(bio_err, "error setting random cookie secret\n");
 700             return 0;
 701         }
 702         cookie_initialized = 1;
 703     }
 704
 705     peer = BIO_ADDR_new();
 706     if (peer == NULL) {
 707         BIO_printf(bio_err, "memory full\n");
 708         return 0;
 709     }
 710
 711     /* Read peer information */
 712     (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), peer);
 713
 714     /* Create buffer with peer's address and port */
 715     BIO_ADDR_rawaddress(peer, NULL, &length);
 716     OPENSSL_assert(length != 0);
 717     port = BIO_ADDR_rawport(peer);
 718     length += sizeof(port);
 719     buffer = app_malloc(length, "cookie generate buffer");
 720
 721     memcpy(buffer, &port, sizeof(port));
 722     BIO_ADDR_rawaddress(peer, buffer + sizeof(port), NULL);
 723
 724     /* Calculate HMAC of buffer using the secret */
 725     HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 726          buffer, length, cookie, cookie_len);
 727
 728     OPENSSL_free(buffer);
 729     BIO_ADDR_free(peer);
 730
 731     return 1;
 732 }
 733
 734 int verify_cookie_callback(SSL *ssl, const unsigned char *cookie,
 735                            unsigned int cookie_len)
 736 {
 737     unsigned char result[EVP_MAX_MD_SIZE];
 738     unsigned int resultlength;
 739
 740     /* Note: we check cookie_initialized because if it's not,
 741      * it cannot be valid */
 742     if (cookie_initialized
 743         && generate_cookie_callback(ssl, result, &resultlength)
 744         && cookie_len == resultlength
 745         && memcmp(result, cookie, resultlength) == 0)
 746         return 1;
 747
 748     return 0;
 749 }
 750 #endif
 751
 752 /*
 753  * Example of extended certificate handling. Where the standard support of
 754  * one certificate per algorithm is not sufficient an application can decide
 755  * which certificate(s) to use at runtime based on whatever criteria it deems
 756  * appropriate.
 757  */
 758
 759 /* Linked list of certificates, keys and chains */
 760 struct ssl_excert_st {
 761     int certform;
 762     const char *certfile;
 763     int keyform;
 764     const char *keyfile;
 765     const char *chainfile;
 766     X509 *cert;
 767     EVP_PKEY *key;
 768     STACK_OF(X509) *chain;
 769     int build_chain;
 770     struct ssl_excert_st *next, *prev;
 771 };
 772
 773 static STRINT_PAIR chain_flags[] = {
 774     {"Overall Validity", CERT_PKEY_VALID},
 775     {"Sign with EE key", CERT_PKEY_SIGN},
 776     {"EE signature", CERT_PKEY_EE_SIGNATURE},
 777     {"CA signature", CERT_PKEY_CA_SIGNATURE},
 778     {"EE key parameters", CERT_PKEY_EE_PARAM},
 779     {"CA key parameters", CERT_PKEY_CA_PARAM},
 780     {"Explicitly sign with EE key", CERT_PKEY_EXPLICIT_SIGN},
 781     {"Issuer Name", CERT_PKEY_ISSUER_NAME},
 782     {"Certificate Type", CERT_PKEY_CERT_TYPE},
 783     {NULL}
 784 };
 785
 786 static void print_chain_flags(SSL *s, int flags)
 787 {
 788     STRINT_PAIR *pp;
 789
 790     for (pp = chain_flags; pp->name; ++pp)
 791         BIO_printf(bio_err, "\t%s: %s\n",
 792                    pp->name,
 793                    (flags & pp->retval) ? "OK" : "NOT OK");
 794     BIO_printf(bio_err, "\tSuite B: ");
 795     if (SSL_set_cert_flags(s, 0) & SSL_CERT_FLAG_SUITEB_128_LOS)
 796         BIO_puts(bio_err, flags & CERT_PKEY_SUITEB ? "OK\n" : "NOT OK\n");
 797     else
 798         BIO_printf(bio_err, "not tested\n");
 799 }
 800
 801 /*
 802  * Very basic selection callback: just use any certificate chain reported as
 803  * valid. More sophisticated could prioritise according to local policy.
 804  */
 805 static int set_cert_cb(SSL *ssl, void *arg)
 806 {
 807     int i, rv;
 808     SSL_EXCERT *exc = arg;
 809 #ifdef CERT_CB_TEST_RETRY
 810     static int retry_cnt;
 811     if (retry_cnt < 5) {
 812         retry_cnt++;
 813         BIO_printf(bio_err,
 814                    "Certificate callback retry test: count %d\n",
 815                    retry_cnt);
 816         return -1;
 817     }
 818 #endif
 819     SSL_certs_clear(ssl);
 820
 821     if (exc == NULL)
 822         return 1;
 823
 824     /*
 825      * Go to end of list and traverse backwards since we prepend newer
 826      * entries this retains the original order.
 827      */
 828     while (exc->next != NULL)
 829         exc = exc->next;
 830
 831     i = 0;
 832
 833     while (exc != NULL) {
 834         i++;
 835         rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
 836         BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
 837         X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
 838                            get_nameopt());
 839         BIO_puts(bio_err, "\n");
 840         print_chain_flags(ssl, rv);
 841         if (rv & CERT_PKEY_VALID) {
 842             if (!SSL_use_certificate(ssl, exc->cert)
 843                     || !SSL_use_PrivateKey(ssl, exc->key)) {
 844                 return 0;
 845             }
 846             /*
 847              * NB: we wouldn't normally do this as it is not efficient
 848              * building chains on each connection better to cache the chain
 849              * in advance.
 850              */
 851             if (exc->build_chain) {
 852                 if (!SSL_build_cert_chain(ssl, 0))
 853                     return 0;
 854             } else if (exc->chain != NULL) {
 855                 SSL_set1_chain(ssl, exc->chain);
 856             }
 857         }
 858         exc = exc->prev;
 859     }
 860     return 1;
 861 }
 862
 863 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
 864 {
 865     SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
 866 }
 867
 868 static int ssl_excert_prepend(SSL_EXCERT **pexc)
 869 {
 870     SSL_EXCERT *exc = app_malloc(sizeof(*exc), "prepend cert");
 871
 872     memset(exc, 0, sizeof(*exc));
 873
 874     exc->next = *pexc;
 875     *pexc = exc;
 876
 877     if (exc->next) {
 878         exc->certform = exc->next->certform;
 879         exc->keyform = exc->next->keyform;
 880         exc->next->prev = exc;
 881     } else {
 882         exc->certform = FORMAT_PEM;
 883         exc->keyform = FORMAT_PEM;
 884     }
 885     return 1;
 886
 887 }
 888
 889 void ssl_excert_free(SSL_EXCERT *exc)
 890 {
 891     SSL_EXCERT *curr;
 892
 893     if (exc == NULL)
 894         return;
 895     while (exc) {
 896         X509_free(exc->cert);
 897         EVP_PKEY_free(exc->key);
 898         sk_X509_pop_free(exc->chain, X509_free);
 899         curr = exc;
 900         exc = exc->next;
 901         OPENSSL_free(curr);
 902     }
 903 }
 904
 905 int load_excert(SSL_EXCERT **pexc)
 906 {
 907     SSL_EXCERT *exc = *pexc;
 908     if (exc == NULL)
 909         return 1;
 910     /* If nothing in list, free and set to NULL */
 911     if (exc->certfile == NULL && exc->next == NULL) {
 912         ssl_excert_free(exc);
 913         *pexc = NULL;
 914         return 1;
 915     }
 916     for (; exc; exc = exc->next) {
 917         if (exc->certfile == NULL) {
 918             BIO_printf(bio_err, "Missing filename\n");
 919             return 0;
 920         }
 921         exc->cert = load_cert(exc->certfile, exc->certform,
 922                               "Server Certificate");
 923         if (exc->cert == NULL)
 924             return 0;
 925         if (exc->keyfile != NULL) {
 926             exc->key = load_key(exc->keyfile, exc->keyform,
 927                                 0, NULL, NULL, "Server Key");
 928         } else {
 929             exc->key = load_key(exc->certfile, exc->certform,
 930                                 0, NULL, NULL, "Server Key");
 931         }
 932         if (exc->key == NULL)
 933             return 0;
 934         if (exc->chainfile != NULL) {
 935             if (!load_certs(exc->chainfile, &exc->chain, FORMAT_PEM, NULL,
 936                             "Server Chain"))
 937                 return 0;
 938         }
 939     }
 940     return 1;
 941 }
 942
 943 enum range { OPT_X_ENUM };
 944
 945 int args_excert(int opt, SSL_EXCERT **pexc)
 946 {
 947     SSL_EXCERT *exc = *pexc;
 948
 949     assert(opt > OPT_X__FIRST);
 950     assert(opt < OPT_X__LAST);
 951
 952     if (exc == NULL) {
 953         if (!ssl_excert_prepend(&exc)) {
 954             BIO_printf(bio_err, " %s: Error initialising xcert\n",
 955                        opt_getprog());
 956             goto err;
 957         }
 958         *pexc = exc;
 959     }
 960
 961     switch ((enum range)opt) {
 962     case OPT_X__FIRST:
 963     case OPT_X__LAST:
 964         return 0;
 965     case OPT_X_CERT:
 966         if (exc->certfile != NULL && !ssl_excert_prepend(&exc)) {
 967             BIO_printf(bio_err, "%s: Error adding xcert\n", opt_getprog());
 968             goto err;
 969         }
 970         *pexc = exc;
 971         exc->certfile = opt_arg();
 972         break;
 973     case OPT_X_KEY:
 974         if (exc->keyfile != NULL) {
 975             BIO_printf(bio_err, "%s: Key already specified\n", opt_getprog());
 976             goto err;
 977         }
 978         exc->keyfile = opt_arg();
 979         break;
 980     case OPT_X_CHAIN:
 981         if (exc->chainfile != NULL) {
 982             BIO_printf(bio_err, "%s: Chain already specified\n",
 983                        opt_getprog());
 984             goto err;
 985         }
 986         exc->chainfile = opt_arg();
 987         break;
 988     case OPT_X_CHAIN_BUILD:
 989         exc->build_chain = 1;
 990         break;
 991     case OPT_X_CERTFORM:
 992         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->certform))
 993             return 0;
 994         break;
 995     case OPT_X_KEYFORM:
 996         if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &exc->keyform))
 997             return 0;
 998         break;
 999     }
1000     return 1;
1001
1002  err:
1003     ERR_print_errors(bio_err);
1004     ssl_excert_free(exc);
1005     *pexc = NULL;
1006     return 0;
1007 }
1008
1009 static void print_raw_cipherlist(SSL *s)
1010 {
1011     const unsigned char *rlist;
1012     static const unsigned char scsv_id[] = { 0, 0xFF };
1013     size_t i, rlistlen, num;
1014     if (!SSL_is_server(s))
1015         return;
1016     num = SSL_get0_raw_cipherlist(s, NULL);
1017     OPENSSL_assert(num == 2);
1018     rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
1019     BIO_puts(bio_err, "Client cipher list: ");
1020     for (i = 0; i < rlistlen; i += num, rlist += num) {
1021         const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
1022         if (i)
1023             BIO_puts(bio_err, ":");
1024         if (c != NULL) {
1025             BIO_puts(bio_err, SSL_CIPHER_get_name(c));
1026         } else if (memcmp(rlist, scsv_id, num) == 0) {
1027             BIO_puts(bio_err, "SCSV");
1028         } else {
1029             size_t j;
1030             BIO_puts(bio_err, "0x");
1031             for (j = 0; j < num; j++)
1032                 BIO_printf(bio_err, "%02X", rlist[j]);
1033         }
1034     }
1035     BIO_puts(bio_err, "\n");
1036 }
1037
1038 /*
1039  * Hex encoder for TLSA RRdata, not ':' delimited.
1040  */
1041 static char *hexencode(const unsigned char *data, size_t len)
1042 {
1043     static const char *hex = "0123456789abcdef";
1044     char *out;
1045     char *cp;
1046     size_t outlen = 2 * len + 1;
1047     int ilen = (int) outlen;
1048
1049     if (outlen < len || ilen < 0 || outlen != (size_t)ilen) {
1050         BIO_printf(bio_err, "%s: %zu-byte buffer too large to hexencode\n",
1051                    opt_getprog(), len);
1052         exit(1);
1053     }
1054     cp = out = app_malloc(ilen, "TLSA hex data buffer");
1055
1056     while (len-- > 0) {
1057         *cp++ = hex[(*data >> 4) & 0x0f];
1058         *cp++ = hex[*data++ & 0x0f];
1059     }
1060     *cp = '\0';
1061     return out;
1062 }
1063
1064 void print_verify_detail(SSL *s, BIO *bio)
1065 {
1066     int mdpth;
1067     EVP_PKEY *mspki;
1068     long verify_err = SSL_get_verify_result(s);
1069
1070     if (verify_err == X509_V_OK) {
1071         const char *peername = SSL_get0_peername(s);
1072
1073         BIO_printf(bio, "Verification: OK\n");
1074         if (peername != NULL)
1075             BIO_printf(bio, "Verified peername: %s\n", peername);
1076     } else {
1077         const char *reason = X509_verify_cert_error_string(verify_err);
1078
1079         BIO_printf(bio, "Verification error: %s\n", reason);
1080     }
1081
1082     if ((mdpth = SSL_get0_dane_authority(s, NULL, &mspki)) >= 0) {
1083         uint8_t usage, selector, mtype;
1084         const unsigned char *data = NULL;
1085         size_t dlen = 0;
1086         char *hexdata;
1087
1088         mdpth = SSL_get0_dane_tlsa(s, &usage, &selector, &mtype, &data, &dlen);
1089
1090         /*
1091          * The TLSA data field can be quite long when it is a certificate,
1092          * public key or even a SHA2-512 digest.  Because the initial octets of
1093          * ASN.1 certificates and public keys contain mostly boilerplate OIDs
1094          * and lengths, we show the last 12 bytes of the data instead, as these
1095          * are more likely to distinguish distinct TLSA records.
1096          */
1097 #define TLSA_TAIL_SIZE 12
1098         if (dlen > TLSA_TAIL_SIZE)
1099             hexdata = hexencode(data + dlen - TLSA_TAIL_SIZE, TLSA_TAIL_SIZE);
1100         else
1101             hexdata = hexencode(data, dlen);
1102         BIO_printf(bio, "DANE TLSA %d %d %d %s%s %s at depth %d\n",
1103                    usage, selector, mtype,
1104                    (dlen > TLSA_TAIL_SIZE) ? "..." : "", hexdata,
1105                    (mspki != NULL) ? "signed the certificate" :
1106                    mdpth ? "matched TA certificate" : "matched EE certificate",
1107                    mdpth);
1108         OPENSSL_free(hexdata);
1109     }
1110 }
1111
1112 void print_ssl_summary(SSL *s)
1113 {
1114     const SSL_CIPHER *c;
1115     X509 *peer;
1116
1117     BIO_printf(bio_err, "Protocol version: %s\n", SSL_get_version(s));
1118     print_raw_cipherlist(s);
1119     c = SSL_get_current_cipher(s);
1120     BIO_printf(bio_err, "Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
1121     do_print_sigalgs(bio_err, s, 0);
1122     peer = SSL_get_peer_certificate(s);
1123     if (peer != NULL) {
1124         int nid;
1125
1126         BIO_puts(bio_err, "Peer certificate: ");
1127         X509_NAME_print_ex(bio_err, X509_get_subject_name(peer),
1128                            0, get_nameopt());
1129         BIO_puts(bio_err, "\n");
1130         if (SSL_get_peer_signature_nid(s, &nid))
1131             BIO_printf(bio_err, "Hash used: %s\n", OBJ_nid2sn(nid));
1132         if (SSL_get_peer_signature_type_nid(s, &nid))
1133             BIO_printf(bio_err, "Signature type: %s\n", get_sigtype(nid));
1134         print_verify_detail(s, bio_err);
1135     } else {
1136         BIO_puts(bio_err, "No peer certificate\n");
1137     }
1138     X509_free(peer);
1139 #ifndef OPENSSL_NO_EC
1140     ssl_print_point_formats(bio_err, s);
1141     if (SSL_is_server(s))
1142         ssl_print_groups(bio_err, s, 1);
1143     else
1144         ssl_print_tmp_key(bio_err, s);
1145 #else
1146     if (!SSL_is_server(s))
1147         ssl_print_tmp_key(bio_err, s);
1148 #endif
1149 }
1150
1151 int config_ctx(SSL_CONF_CTX *cctx, STACK_OF(OPENSSL_STRING) *str,
1152                SSL_CTX *ctx)
1153 {
1154     int i;
1155
1156     SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
1157     for (i = 0; i < sk_OPENSSL_STRING_num(str); i += 2) {
1158         const char *flag = sk_OPENSSL_STRING_value(str, i);
1159         const char *arg = sk_OPENSSL_STRING_value(str, i + 1);
1160         if (SSL_CONF_cmd(cctx, flag, arg) <= 0) {
1161             if (arg != NULL)
1162                 BIO_printf(bio_err, "Error with command: \"%s %s\"\n",
1163                            flag, arg);
1164             else
1165                 BIO_printf(bio_err, "Error with command: \"%s\"\n", flag);
1166             ERR_print_errors(bio_err);
1167             return 0;
1168         }
1169     }
1170     if (!SSL_CONF_CTX_finish(cctx)) {
1171         BIO_puts(bio_err, "Error finishing context\n");
1172         ERR_print_errors(bio_err);
1173         return 0;
1174     }
1175     return 1;
1176 }
1177
1178 static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
1179 {
1180     X509_CRL *crl;
1181     int i;
1182     for (i = 0; i < sk_X509_CRL_num(crls); i++) {
1183         crl = sk_X509_CRL_value(crls, i);
1184         X509_STORE_add_crl(st, crl);
1185     }
1186     return 1;
1187 }
1188
1189 int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls, int crl_download)
1190 {
1191     X509_STORE *st;
1192     st = SSL_CTX_get_cert_store(ctx);
1193     add_crls_store(st, crls);
1194     if (crl_download)
1195         store_setup_crl_download(st);
1196     return 1;
1197 }
1198
1199 int ssl_load_stores(SSL_CTX *ctx,
1200                     const char *vfyCApath, const char *vfyCAfile,
1201                     const char *chCApath, const char *chCAfile,
1202                     STACK_OF(X509_CRL) *crls, int crl_download)
1203 {
1204     X509_STORE *vfy = NULL, *ch = NULL;
1205     int rv = 0;
1206     if (vfyCApath != NULL || vfyCAfile != NULL) {
1207         vfy = X509_STORE_new();
1208         if (vfy == NULL)
1209             goto err;
1210         if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
1211             goto err;
1212         add_crls_store(vfy, crls);
1213         SSL_CTX_set1_verify_cert_store(ctx, vfy);
1214         if (crl_download)
1215             store_setup_crl_download(vfy);
1216     }
1217     if (chCApath != NULL || chCAfile != NULL) {
1218         ch = X509_STORE_new();
1219         if (ch == NULL)
1220             goto err;
1221         if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
1222             goto err;
1223         SSL_CTX_set1_chain_cert_store(ctx, ch);
1224     }
1225     rv = 1;
1226  err:
1227     X509_STORE_free(vfy);
1228     X509_STORE_free(ch);
1229     return rv;
1230 }
1231
1232 /* Verbose print out of security callback */
1233
1234 typedef struct {
1235     BIO *out;
1236     int verbose;
1237     int (*old_cb) (const SSL *s, const SSL_CTX *ctx, int op, int bits, int nid,
1238                    void *other, void *ex);
1239 } security_debug_ex;
1240
1241 static STRINT_PAIR callback_types[] = {
1242     {"Supported Ciphersuite", SSL_SECOP_CIPHER_SUPPORTED},
1243     {"Shared Ciphersuite", SSL_SECOP_CIPHER_SHARED},
1244     {"Check Ciphersuite", SSL_SECOP_CIPHER_CHECK},
1245 #ifndef OPENSSL_NO_DH
1246     {"Temp DH key bits", SSL_SECOP_TMP_DH},
1247 #endif
1248     {"Supported Curve", SSL_SECOP_CURVE_SUPPORTED},
1249     {"Shared Curve", SSL_SECOP_CURVE_SHARED},
1250     {"Check Curve", SSL_SECOP_CURVE_CHECK},
1251     {"Supported Signature Algorithm digest", SSL_SECOP_SIGALG_SUPPORTED},
1252     {"Shared Signature Algorithm digest", SSL_SECOP_SIGALG_SHARED},
1253     {"Check Signature Algorithm digest", SSL_SECOP_SIGALG_CHECK},
1254     {"Signature Algorithm mask", SSL_SECOP_SIGALG_MASK},
1255     {"Certificate chain EE key", SSL_SECOP_EE_KEY},
1256     {"Certificate chain CA key", SSL_SECOP_CA_KEY},
1257     {"Peer Chain EE key", SSL_SECOP_PEER_EE_KEY},
1258     {"Peer Chain CA key", SSL_SECOP_PEER_CA_KEY},
1259     {"Certificate chain CA digest", SSL_SECOP_CA_MD},
1260     {"Peer chain CA digest", SSL_SECOP_PEER_CA_MD},
1261     {"SSL compression", SSL_SECOP_COMPRESSION},
1262     {"Session ticket", SSL_SECOP_TICKET},
1263     {NULL}
1264 };
1265
1266 static int security_callback_debug(const SSL *s, const SSL_CTX *ctx,
1267                                    int op, int bits, int nid,
1268                                    void *other, void *ex)
1269 {
1270     security_debug_ex *sdb = ex;
1271     int rv, show_bits = 1, cert_md = 0;
1272     const char *nm;
1273     rv = sdb->old_cb(s, ctx, op, bits, nid, other, ex);
1274     if (rv == 1 && sdb->verbose < 2)
1275         return 1;
1276     BIO_puts(sdb->out, "Security callback: ");
1277
1278     nm = lookup(op, callback_types, NULL);
1279     switch (op) {
1280     case SSL_SECOP_TICKET:
1281     case SSL_SECOP_COMPRESSION:
1282         show_bits = 0;
1283         nm = NULL;
1284         break;
1285     case SSL_SECOP_VERSION:
1286         BIO_printf(sdb->out, "Version=%s", lookup(nid, ssl_versions, "???"));
1287         show_bits = 0;
1288         nm = NULL;
1289         break;
1290     case SSL_SECOP_CA_MD:
1291     case SSL_SECOP_PEER_CA_MD:
1292         cert_md = 1;
1293         break;
1294     }
1295     if (nm != NULL)
1296         BIO_printf(sdb->out, "%s=", nm);
1297
1298     switch (op & SSL_SECOP_OTHER_TYPE) {
1299
1300     case SSL_SECOP_OTHER_CIPHER:
1301         BIO_puts(sdb->out, SSL_CIPHER_get_name(other));
1302         break;
1303
1304 #ifndef OPENSSL_NO_EC
1305     case SSL_SECOP_OTHER_CURVE:
1306         {
1307             const char *cname;
1308             cname = EC_curve_nid2nist(nid);
1309             if (cname == NULL)
1310                 cname = OBJ_nid2sn(nid);
1311             BIO_puts(sdb->out, cname);
1312         }
1313         break;
1314 #endif
1315 #ifndef OPENSSL_NO_DH
1316     case SSL_SECOP_OTHER_DH:
1317         {
1318             DH *dh = other;
1319             BIO_printf(sdb->out, "%d", DH_bits(dh));
1320             break;
1321         }
1322 #endif
1323     case SSL_SECOP_OTHER_CERT:
1324         {
1325             if (cert_md) {
1326                 int sig_nid = X509_get_signature_nid(other);
1327                 BIO_puts(sdb->out, OBJ_nid2sn(sig_nid));
1328             } else {
1329                 EVP_PKEY *pkey = X509_get0_pubkey(other);
1330                 const char *algname = "";
1331                 EVP_PKEY_asn1_get0_info(NULL, NULL, NULL, NULL,
1332                                         &algname, EVP_PKEY_get0_asn1(pkey));
1333                 BIO_printf(sdb->out, "%s, bits=%d",
1334                            algname, EVP_PKEY_bits(pkey));
1335             }
1336             break;
1337         }
1338     case SSL_SECOP_OTHER_SIGALG:
1339         {
1340             const unsigned char *salg = other;
1341             const char *sname = NULL;
1342             switch (salg[1]) {
1343             case TLSEXT_signature_anonymous:
1344                 sname = "anonymous";
1345                 break;
1346             case TLSEXT_signature_rsa:
1347                 sname = "RSA";
1348                 break;
1349             case TLSEXT_signature_dsa:
1350                 sname = "DSA";
1351                 break;
1352             case TLSEXT_signature_ecdsa:
1353                 sname = "ECDSA";
1354                 break;
1355             }
1356
1357             BIO_puts(sdb->out, OBJ_nid2sn(nid));
1358             if (sname)
1359                 BIO_printf(sdb->out, ", algorithm=%s", sname);
1360             else
1361                 BIO_printf(sdb->out, ", algid=%d", salg[1]);
1362             break;
1363         }
1364
1365     }
1366
1367     if (show_bits)
1368         BIO_printf(sdb->out, ", security bits=%d", bits);
1369     BIO_printf(sdb->out, ": %s\n", rv ? "yes" : "no");
1370     return rv;
1371 }
1372
1373 void ssl_ctx_security_debug(SSL_CTX *ctx, int verbose)
1374 {
1375     static security_debug_ex sdb;
1376
1377     sdb.out = bio_err;
1378     sdb.verbose = verbose;
1379     sdb.old_cb = SSL_CTX_get_security_callback(ctx);
1380     SSL_CTX_set_security_callback(ctx, security_callback_debug);
1381     SSL_CTX_set0_security_ex_data(ctx, &sdb);
1382 }
1383
1384 static void keylog_callback(const SSL *ssl, const char *line)
1385 {
1386     if (bio_keylog == NULL) {
1387         BIO_printf(bio_err, "Keylog callback is invoked without valid file!\n");
1388         return;
1389     }
1390
1391     /*
1392      * There might be concurrent writers to the keylog file, so we must ensure
1393      * that the given line is written at once.
1394      */
1395     BIO_printf(bio_keylog, "%s\n", line);
1396     (void)BIO_flush(bio_keylog);
1397 }
1398
1399 int set_keylog_file(SSL_CTX *ctx, const char *keylog_file)
1400 {
1401     /* Close any open files */
1402     BIO_free_all(bio_keylog);
1403     bio_keylog = NULL;
1404
1405     if (ctx == NULL || keylog_file == NULL) {
1406         /* Keylogging is disabled, OK. */
1407         return 0;
1408     }
1409
1410     /*
1411      * Append rather than write in order to allow concurrent modification.
1412      * Furthermore, this preserves existing keylog files which is useful when
1413      * the tool is run multiple times.
1414      */
1415     bio_keylog = BIO_new_file(keylog_file, "a");
1416     if (bio_keylog == NULL) {
1417         BIO_printf(bio_err, "Error writing keylog file %s\n", keylog_file);
1418         return 1;
1419     }
1420
1421     /* Write a header for seekable, empty files (this excludes pipes). */
1422     if (BIO_tell(bio_keylog) == 0) {
1423         BIO_puts(bio_keylog,
1424                  "# SSL/TLS secrets log file, generated by OpenSSL\n");
1425         (void)BIO_flush(bio_keylog);
1426     }
1427     SSL_CTX_set_keylog_callback(ctx, keylog_callback);
1428     return 0;
1429 }
1430
1431 void print_ca_names(BIO *bio, SSL *s)
1432 {
1433     const char *cs = SSL_is_server(s) ? "server" : "client";
1434     const STACK_OF(X509_NAME) *sk = SSL_get0_peer_CA_list(s);
1435     int i;
1436
1437     if (sk == NULL || sk_X509_NAME_num(sk) == 0) {
1438         BIO_printf(bio, "---\nNo %s certificate CA names sent\n", cs);
1439         return;
1440     }
1441
1442     BIO_printf(bio, "---\nAcceptable %s certificate CA names\n",cs);
1443     for (i = 0; i < sk_X509_NAME_num(sk); i++) {
1444         X509_NAME_print_ex(bio, sk_X509_NAME_value(sk, i), 0, get_nameopt());
1445         BIO_write(bio, "\n", 1);
1446     }
1447 }