ssl/ssl_rsa.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "ssl_locl.h"
  12 #include "internal/packet.h"
  13 #include <openssl/bio.h>
  14 #include <openssl/objects.h>
  15 #include <openssl/evp.h>
  16 #include <openssl/x509.h>
  17 #include <openssl/pem.h>
  18
  19 static int ssl_set_cert(CERT *c, X509 *x509);
  20 static int ssl_set_pkey(CERT *c, EVP_PKEY *pkey);
  21
  22 #define  SYNTHV1CONTEXT     (SSL_EXT_TLS1_2_AND_BELOW_ONLY \
  23                              | SSL_EXT_CLIENT_HELLO \
  24                              | SSL_EXT_TLS1_2_SERVER_HELLO \
  25                              | SSL_EXT_IGNORE_ON_RESUMPTION)
  26
  27 int SSL_use_certificate(SSL *ssl, X509 *x)
  28 {
  29     int rv;
  30     if (x == NULL) {
  31         SSLerr(SSL_F_SSL_USE_CERTIFICATE, ERR_R_PASSED_NULL_PARAMETER);
  32         return 0;
  33     }
  34     rv = ssl_security_cert(ssl, NULL, x, 0, 1);
  35     if (rv != 1) {
  36         SSLerr(SSL_F_SSL_USE_CERTIFICATE, rv);
  37         return 0;
  38     }
  39
  40     return ssl_set_cert(ssl->cert, x);
  41 }
  42
  43 int SSL_use_certificate_file(SSL *ssl, const char *file, int type)
  44 {
  45     int j;
  46     BIO *in;
  47     int ret = 0;
  48     X509 *x = NULL;
  49
  50     in = BIO_new(BIO_s_file());
  51     if (in == NULL) {
  52         SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, ERR_R_BUF_LIB);
  53         goto end;
  54     }
  55
  56     if (BIO_read_filename(in, file) <= 0) {
  57         SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, ERR_R_SYS_LIB);
  58         goto end;
  59     }
  60     if (type == SSL_FILETYPE_ASN1) {
  61         j = ERR_R_ASN1_LIB;
  62         x = d2i_X509_bio(in, NULL);
  63     } else if (type == SSL_FILETYPE_PEM) {
  64         j = ERR_R_PEM_LIB;
  65         x = PEM_read_bio_X509(in, NULL, ssl->default_passwd_callback,
  66                               ssl->default_passwd_callback_userdata);
  67     } else {
  68         SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, SSL_R_BAD_SSL_FILETYPE);
  69         goto end;
  70     }
  71
  72     if (x == NULL) {
  73         SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, j);
  74         goto end;
  75     }
  76
  77     ret = SSL_use_certificate(ssl, x);
  78  end:
  79     X509_free(x);
  80     BIO_free(in);
  81     return ret;
  82 }
  83
  84 int SSL_use_certificate_ASN1(SSL *ssl, const unsigned char *d, int len)
  85 {
  86     X509 *x;
  87     int ret;
  88
  89     x = d2i_X509(NULL, &d, (long)len);
  90     if (x == NULL) {
  91         SSLerr(SSL_F_SSL_USE_CERTIFICATE_ASN1, ERR_R_ASN1_LIB);
  92         return 0;
  93     }
  94
  95     ret = SSL_use_certificate(ssl, x);
  96     X509_free(x);
  97     return ret;
  98 }
  99
 100 #ifndef OPENSSL_NO_RSA
 101 int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa)
 102 {
 103     EVP_PKEY *pkey;
 104     int ret;
 105
 106     if (rsa == NULL) {
 107         SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
 108         return 0;
 109     }
 110     if ((pkey = EVP_PKEY_new()) == NULL) {
 111         SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY, ERR_R_EVP_LIB);
 112         return 0;
 113     }
 114
 115     RSA_up_ref(rsa);
 116     if (EVP_PKEY_assign_RSA(pkey, rsa) <= 0) {
 117         RSA_free(rsa);
 118         EVP_PKEY_free(pkey);
 119         return 0;
 120     }
 121
 122     ret = ssl_set_pkey(ssl->cert, pkey);
 123     EVP_PKEY_free(pkey);
 124     return ret;
 125 }
 126 #endif
 127
 128 static int ssl_set_pkey(CERT *c, EVP_PKEY *pkey)
 129 {
 130     size_t i;
 131
 132     if (ssl_cert_lookup_by_pkey(pkey, &i) == NULL) {
 133         SSLerr(SSL_F_SSL_SET_PKEY, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
 134         return 0;
 135     }
 136
 137     if (c->pkeys[i].x509 != NULL) {
 138         EVP_PKEY *pktmp;
 139         pktmp = X509_get0_pubkey(c->pkeys[i].x509);
 140         if (pktmp == NULL) {
 141             SSLerr(SSL_F_SSL_SET_PKEY, ERR_R_MALLOC_FAILURE);
 142             return 0;
 143         }
 144         /*
 145          * The return code from EVP_PKEY_copy_parameters is deliberately
 146          * ignored. Some EVP_PKEY types cannot do this.
 147          */
 148         EVP_PKEY_copy_parameters(pktmp, pkey);
 149         ERR_clear_error();
 150
 151 #ifndef OPENSSL_NO_RSA
 152         /*
 153          * Don't check the public/private key, this is mostly for smart
 154          * cards.
 155          */
 156         if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA
 157             && RSA_flags(EVP_PKEY_get0_RSA(pkey)) & RSA_METHOD_FLAG_NO_CHECK) ;
 158         else
 159 #endif
 160         if (!X509_check_private_key(c->pkeys[i].x509, pkey)) {
 161             X509_free(c->pkeys[i].x509);
 162             c->pkeys[i].x509 = NULL;
 163             return 0;
 164         }
 165     }
 166
 167     EVP_PKEY_free(c->pkeys[i].privatekey);
 168     EVP_PKEY_up_ref(pkey);
 169     c->pkeys[i].privatekey = pkey;
 170     c->key = &c->pkeys[i];
 171     return 1;
 172 }
 173
 174 #ifndef OPENSSL_NO_RSA
 175 int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type)
 176 {
 177     int j, ret = 0;
 178     BIO *in;
 179     RSA *rsa = NULL;
 180
 181     in = BIO_new(BIO_s_file());
 182     if (in == NULL) {
 183         SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, ERR_R_BUF_LIB);
 184         goto end;
 185     }
 186
 187     if (BIO_read_filename(in, file) <= 0) {
 188         SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, ERR_R_SYS_LIB);
 189         goto end;
 190     }
 191     if (type == SSL_FILETYPE_ASN1) {
 192         j = ERR_R_ASN1_LIB;
 193         rsa = d2i_RSAPrivateKey_bio(in, NULL);
 194     } else if (type == SSL_FILETYPE_PEM) {
 195         j = ERR_R_PEM_LIB;
 196         rsa = PEM_read_bio_RSAPrivateKey(in, NULL,
 197                                          ssl->default_passwd_callback,
 198                                          ssl->default_passwd_callback_userdata);
 199     } else {
 200         SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE);
 201         goto end;
 202     }
 203     if (rsa == NULL) {
 204         SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, j);
 205         goto end;
 206     }
 207     ret = SSL_use_RSAPrivateKey(ssl, rsa);
 208     RSA_free(rsa);
 209  end:
 210     BIO_free(in);
 211     return ret;
 212 }
 213
 214 int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, const unsigned char *d, long len)
 215 {
 216     int ret;
 217     const unsigned char *p;
 218     RSA *rsa;
 219
 220     p = d;
 221     if ((rsa = d2i_RSAPrivateKey(NULL, &p, (long)len)) == NULL) {
 222         SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_ASN1, ERR_R_ASN1_LIB);
 223         return 0;
 224     }
 225
 226     ret = SSL_use_RSAPrivateKey(ssl, rsa);
 227     RSA_free(rsa);
 228     return ret;
 229 }
 230 #endif                          /* !OPENSSL_NO_RSA */
 231
 232 int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey)
 233 {
 234     int ret;
 235
 236     if (pkey == NULL) {
 237         SSLerr(SSL_F_SSL_USE_PRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
 238         return 0;
 239     }
 240     ret = ssl_set_pkey(ssl->cert, pkey);
 241     return ret;
 242 }
 243
 244 int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type)
 245 {
 246     int j, ret = 0;
 247     BIO *in;
 248     EVP_PKEY *pkey = NULL;
 249
 250     in = BIO_new(BIO_s_file());
 251     if (in == NULL) {
 252         SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, ERR_R_BUF_LIB);
 253         goto end;
 254     }
 255
 256     if (BIO_read_filename(in, file) <= 0) {
 257         SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, ERR_R_SYS_LIB);
 258         goto end;
 259     }
 260     if (type == SSL_FILETYPE_PEM) {
 261         j = ERR_R_PEM_LIB;
 262         pkey = PEM_read_bio_PrivateKey(in, NULL,
 263                                        ssl->default_passwd_callback,
 264                                        ssl->default_passwd_callback_userdata);
 265     } else if (type == SSL_FILETYPE_ASN1) {
 266         j = ERR_R_ASN1_LIB;
 267         pkey = d2i_PrivateKey_bio(in, NULL);
 268     } else {
 269         SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE);
 270         goto end;
 271     }
 272     if (pkey == NULL) {
 273         SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, j);
 274         goto end;
 275     }
 276     ret = SSL_use_PrivateKey(ssl, pkey);
 277     EVP_PKEY_free(pkey);
 278  end:
 279     BIO_free(in);
 280     return ret;
 281 }
 282
 283 int SSL_use_PrivateKey_ASN1(int type, SSL *ssl, const unsigned char *d,
 284                             long len)
 285 {
 286     int ret;
 287     const unsigned char *p;
 288     EVP_PKEY *pkey;
 289
 290     p = d;
 291     if ((pkey = d2i_PrivateKey(type, NULL, &p, (long)len)) == NULL) {
 292         SSLerr(SSL_F_SSL_USE_PRIVATEKEY_ASN1, ERR_R_ASN1_LIB);
 293         return 0;
 294     }
 295
 296     ret = SSL_use_PrivateKey(ssl, pkey);
 297     EVP_PKEY_free(pkey);
 298     return ret;
 299 }
 300
 301 int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x)
 302 {
 303     int rv;
 304     if (x == NULL) {
 305         SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE, ERR_R_PASSED_NULL_PARAMETER);
 306         return 0;
 307     }
 308     rv = ssl_security_cert(NULL, ctx, x, 0, 1);
 309     if (rv != 1) {
 310         SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE, rv);
 311         return 0;
 312     }
 313     return ssl_set_cert(ctx->cert, x);
 314 }
 315
 316 static int ssl_set_cert(CERT *c, X509 *x)
 317 {
 318     EVP_PKEY *pkey;
 319     size_t i;
 320
 321     pkey = X509_get0_pubkey(x);
 322     if (pkey == NULL) {
 323         SSLerr(SSL_F_SSL_SET_CERT, SSL_R_X509_LIB);
 324         return 0;
 325     }
 326
 327     if (ssl_cert_lookup_by_pkey(pkey, &i) == NULL) {
 328         SSLerr(SSL_F_SSL_SET_CERT, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
 329         return 0;
 330     }
 331 #ifndef OPENSSL_NO_EC
 332     if (i == SSL_PKEY_ECC && !EC_KEY_can_sign(EVP_PKEY_get0_EC_KEY(pkey))) {
 333         SSLerr(SSL_F_SSL_SET_CERT, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
 334         return 0;
 335     }
 336 #endif
 337     if (c->pkeys[i].privatekey != NULL) {
 338         /*
 339          * The return code from EVP_PKEY_copy_parameters is deliberately
 340          * ignored. Some EVP_PKEY types cannot do this.
 341          */
 342         EVP_PKEY_copy_parameters(pkey, c->pkeys[i].privatekey);
 343         ERR_clear_error();
 344
 345 #ifndef OPENSSL_NO_RSA
 346         /*
 347          * Don't check the public/private key, this is mostly for smart
 348          * cards.
 349          */
 350         if (EVP_PKEY_id(c->pkeys[i].privatekey) == EVP_PKEY_RSA
 351             && RSA_flags(EVP_PKEY_get0_RSA(c->pkeys[i].privatekey)) &
 352             RSA_METHOD_FLAG_NO_CHECK) ;
 353         else
 354 #endif                          /* OPENSSL_NO_RSA */
 355         if (!X509_check_private_key(x, c->pkeys[i].privatekey)) {
 356             /*
 357              * don't fail for a cert/key mismatch, just free current private
 358              * key (when switching to a different cert & key, first this
 359              * function should be used, then ssl_set_pkey
 360              */
 361             EVP_PKEY_free(c->pkeys[i].privatekey);
 362             c->pkeys[i].privatekey = NULL;
 363             /* clear error queue */
 364             ERR_clear_error();
 365         }
 366     }
 367
 368     X509_free(c->pkeys[i].x509);
 369     X509_up_ref(x);
 370     c->pkeys[i].x509 = x;
 371     c->key = &(c->pkeys[i]);
 372
 373     return 1;
 374 }
 375
 376 int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type)
 377 {
 378     int j;
 379     BIO *in;
 380     int ret = 0;
 381     X509 *x = NULL;
 382
 383     in = BIO_new(BIO_s_file());
 384     if (in == NULL) {
 385         SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, ERR_R_BUF_LIB);
 386         goto end;
 387     }
 388
 389     if (BIO_read_filename(in, file) <= 0) {
 390         SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, ERR_R_SYS_LIB);
 391         goto end;
 392     }
 393     if (type == SSL_FILETYPE_ASN1) {
 394         j = ERR_R_ASN1_LIB;
 395         x = d2i_X509_bio(in, NULL);
 396     } else if (type == SSL_FILETYPE_PEM) {
 397         j = ERR_R_PEM_LIB;
 398         x = PEM_read_bio_X509(in, NULL, ctx->default_passwd_callback,
 399                               ctx->default_passwd_callback_userdata);
 400     } else {
 401         SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, SSL_R_BAD_SSL_FILETYPE);
 402         goto end;
 403     }
 404
 405     if (x == NULL) {
 406         SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, j);
 407         goto end;
 408     }
 409
 410     ret = SSL_CTX_use_certificate(ctx, x);
 411  end:
 412     X509_free(x);
 413     BIO_free(in);
 414     return ret;
 415 }
 416
 417 int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len, const unsigned char *d)
 418 {
 419     X509 *x;
 420     int ret;
 421
 422     x = d2i_X509(NULL, &d, (long)len);
 423     if (x == NULL) {
 424         SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_ASN1, ERR_R_ASN1_LIB);
 425         return 0;
 426     }
 427
 428     ret = SSL_CTX_use_certificate(ctx, x);
 429     X509_free(x);
 430     return ret;
 431 }
 432
 433 #ifndef OPENSSL_NO_RSA
 434 int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa)
 435 {
 436     int ret;
 437     EVP_PKEY *pkey;
 438
 439     if (rsa == NULL) {
 440         SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
 441         return 0;
 442     }
 443     if ((pkey = EVP_PKEY_new()) == NULL) {
 444         SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY, ERR_R_EVP_LIB);
 445         return 0;
 446     }
 447
 448     RSA_up_ref(rsa);
 449     if (EVP_PKEY_assign_RSA(pkey, rsa) <= 0) {
 450         RSA_free(rsa);
 451         EVP_PKEY_free(pkey);
 452         return 0;
 453     }
 454
 455     ret = ssl_set_pkey(ctx->cert, pkey);
 456     EVP_PKEY_free(pkey);
 457     return ret;
 458 }
 459
 460 int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type)
 461 {
 462     int j, ret = 0;
 463     BIO *in;
 464     RSA *rsa = NULL;
 465
 466     in = BIO_new(BIO_s_file());
 467     if (in == NULL) {
 468         SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, ERR_R_BUF_LIB);
 469         goto end;
 470     }
 471
 472     if (BIO_read_filename(in, file) <= 0) {
 473         SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, ERR_R_SYS_LIB);
 474         goto end;
 475     }
 476     if (type == SSL_FILETYPE_ASN1) {
 477         j = ERR_R_ASN1_LIB;
 478         rsa = d2i_RSAPrivateKey_bio(in, NULL);
 479     } else if (type == SSL_FILETYPE_PEM) {
 480         j = ERR_R_PEM_LIB;
 481         rsa = PEM_read_bio_RSAPrivateKey(in, NULL,
 482                                          ctx->default_passwd_callback,
 483                                          ctx->default_passwd_callback_userdata);
 484     } else {
 485         SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE);
 486         goto end;
 487     }
 488     if (rsa == NULL) {
 489         SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, j);
 490         goto end;
 491     }
 492     ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa);
 493     RSA_free(rsa);
 494  end:
 495     BIO_free(in);
 496     return ret;
 497 }
 498
 499 int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, const unsigned char *d,
 500                                    long len)
 501 {
 502     int ret;
 503     const unsigned char *p;
 504     RSA *rsa;
 505
 506     p = d;
 507     if ((rsa = d2i_RSAPrivateKey(NULL, &p, (long)len)) == NULL) {
 508         SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_ASN1, ERR_R_ASN1_LIB);
 509         return 0;
 510     }
 511
 512     ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa);
 513     RSA_free(rsa);
 514     return ret;
 515 }
 516 #endif                          /* !OPENSSL_NO_RSA */
 517
 518 int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey)
 519 {
 520     if (pkey == NULL) {
 521         SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
 522         return 0;
 523     }
 524     return ssl_set_pkey(ctx->cert, pkey);
 525 }
 526
 527 int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type)
 528 {
 529     int j, ret = 0;
 530     BIO *in;
 531     EVP_PKEY *pkey = NULL;
 532
 533     in = BIO_new(BIO_s_file());
 534     if (in == NULL) {
 535         SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, ERR_R_BUF_LIB);
 536         goto end;
 537     }
 538
 539     if (BIO_read_filename(in, file) <= 0) {
 540         SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, ERR_R_SYS_LIB);
 541         goto end;
 542     }
 543     if (type == SSL_FILETYPE_PEM) {
 544         j = ERR_R_PEM_LIB;
 545         pkey = PEM_read_bio_PrivateKey(in, NULL,
 546                                        ctx->default_passwd_callback,
 547                                        ctx->default_passwd_callback_userdata);
 548     } else if (type == SSL_FILETYPE_ASN1) {
 549         j = ERR_R_ASN1_LIB;
 550         pkey = d2i_PrivateKey_bio(in, NULL);
 551     } else {
 552         SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE);
 553         goto end;
 554     }
 555     if (pkey == NULL) {
 556         SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, j);
 557         goto end;
 558     }
 559     ret = SSL_CTX_use_PrivateKey(ctx, pkey);
 560     EVP_PKEY_free(pkey);
 561  end:
 562     BIO_free(in);
 563     return ret;
 564 }
 565
 566 int SSL_CTX_use_PrivateKey_ASN1(int type, SSL_CTX *ctx,
 567                                 const unsigned char *d, long len)
 568 {
 569     int ret;
 570     const unsigned char *p;
 571     EVP_PKEY *pkey;
 572
 573     p = d;
 574     if ((pkey = d2i_PrivateKey(type, NULL, &p, (long)len)) == NULL) {
 575         SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_ASN1, ERR_R_ASN1_LIB);
 576         return 0;
 577     }
 578
 579     ret = SSL_CTX_use_PrivateKey(ctx, pkey);
 580     EVP_PKEY_free(pkey);
 581     return ret;
 582 }
 583
 584 /*
 585  * Read a file that contains our certificate in "PEM" format, possibly
 586  * followed by a sequence of CA certificates that should be sent to the peer
 587  * in the Certificate message.
 588  */
 589 static int use_certificate_chain_file(SSL_CTX *ctx, SSL *ssl, const char *file)
 590 {
 591     BIO *in;
 592     int ret = 0;
 593     X509 *x = NULL;
 594     pem_password_cb *passwd_callback;
 595     void *passwd_callback_userdata;
 596
 597     ERR_clear_error();          /* clear error stack for
 598                                  * SSL_CTX_use_certificate() */
 599
 600     if (ctx != NULL) {
 601         passwd_callback = ctx->default_passwd_callback;
 602         passwd_callback_userdata = ctx->default_passwd_callback_userdata;
 603     } else {
 604         passwd_callback = ssl->default_passwd_callback;
 605         passwd_callback_userdata = ssl->default_passwd_callback_userdata;
 606     }
 607
 608     in = BIO_new(BIO_s_file());
 609     if (in == NULL) {
 610         SSLerr(SSL_F_USE_CERTIFICATE_CHAIN_FILE, ERR_R_BUF_LIB);
 611         goto end;
 612     }
 613
 614     if (BIO_read_filename(in, file) <= 0) {
 615         SSLerr(SSL_F_USE_CERTIFICATE_CHAIN_FILE, ERR_R_SYS_LIB);
 616         goto end;
 617     }
 618
 619     x = PEM_read_bio_X509_AUX(in, NULL, passwd_callback,
 620                               passwd_callback_userdata);
 621     if (x == NULL) {
 622         SSLerr(SSL_F_USE_CERTIFICATE_CHAIN_FILE, ERR_R_PEM_LIB);
 623         goto end;
 624     }
 625
 626     if (ctx)
 627         ret = SSL_CTX_use_certificate(ctx, x);
 628     else
 629         ret = SSL_use_certificate(ssl, x);
 630
 631     if (ERR_peek_error() != 0)
 632         ret = 0;                /* Key/certificate mismatch doesn't imply
 633                                  * ret==0 ... */
 634     if (ret) {
 635         /*
 636          * If we could set up our certificate, now proceed to the CA
 637          * certificates.
 638          */
 639         X509 *ca;
 640         int r;
 641         unsigned long err;
 642
 643         if (ctx)
 644             r = SSL_CTX_clear_chain_certs(ctx);
 645         else
 646             r = SSL_clear_chain_certs(ssl);
 647
 648         if (r == 0) {
 649             ret = 0;
 650             goto end;
 651         }
 652
 653         while ((ca = PEM_read_bio_X509(in, NULL, passwd_callback,
 654                                        passwd_callback_userdata))
 655                != NULL) {
 656             if (ctx)
 657                 r = SSL_CTX_add0_chain_cert(ctx, ca);
 658             else
 659                 r = SSL_add0_chain_cert(ssl, ca);
 660             /*
 661              * Note that we must not free ca if it was successfully added to
 662              * the chain (while we must free the main certificate, since its
 663              * reference count is increased by SSL_CTX_use_certificate).
 664              */
 665             if (!r) {
 666                 X509_free(ca);
 667                 ret = 0;
 668                 goto end;
 669             }
 670         }
 671         /* When the while loop ends, it's usually just EOF. */
 672         err = ERR_peek_last_error();
 673         if (ERR_GET_LIB(err) == ERR_LIB_PEM
 674             && ERR_GET_REASON(err) == PEM_R_NO_START_LINE)
 675             ERR_clear_error();
 676         else
 677             ret = 0;            /* some real error */
 678     }
 679
 680  end:
 681     X509_free(x);
 682     BIO_free(in);
 683     return ret;
 684 }
 685
 686 int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file)
 687 {
 688     return use_certificate_chain_file(ctx, NULL, file);
 689 }
 690
 691 int SSL_use_certificate_chain_file(SSL *ssl, const char *file)
 692 {
 693     return use_certificate_chain_file(NULL, ssl, file);
 694 }
 695
 696 static int serverinfo_find_extension(const unsigned char *serverinfo,
 697                                      size_t serverinfo_length,
 698                                      unsigned int extension_type,
 699                                      const unsigned char **extension_data,
 700                                      size_t *extension_length)
 701 {
 702     PACKET pkt, data;
 703
 704     *extension_data = NULL;
 705     *extension_length = 0;
 706     if (serverinfo == NULL || serverinfo_length == 0)
 707         return -1;
 708
 709     if (!PACKET_buf_init(&pkt, serverinfo, serverinfo_length))
 710         return -1;
 711
 712     for (;;) {
 713         unsigned int type = 0;
 714         unsigned long context = 0;
 715
 716         /* end of serverinfo */
 717         if (PACKET_remaining(&pkt) == 0)
 718             return 0;           /* Extension not found */
 719
 720         if (!PACKET_get_net_4(&pkt, &context)
 721                 || !PACKET_get_net_2(&pkt, &type)
 722                 || !PACKET_get_length_prefixed_2(&pkt, &data))
 723             return -1;
 724
 725         if (type == extension_type) {
 726             *extension_data = PACKET_data(&data);
 727             *extension_length = PACKET_remaining(&data);;
 728             return 1;           /* Success */
 729         }
 730     }
 731     /* Unreachable */
 732 }
 733
 734 static int serverinfoex_srv_parse_cb(SSL *s, unsigned int ext_type,
 735                                      unsigned int context,
 736                                      const unsigned char *in,
 737                                      size_t inlen, X509 *x, size_t chainidx,
 738                                      int *al, void *arg)
 739 {
 740
 741     if (inlen != 0) {
 742         *al = SSL_AD_DECODE_ERROR;
 743         return 0;
 744     }
 745
 746     return 1;
 747 }
 748
 749 static int serverinfo_srv_parse_cb(SSL *s, unsigned int ext_type,
 750                                    const unsigned char *in,
 751                                    size_t inlen, int *al, void *arg)
 752 {
 753     return serverinfoex_srv_parse_cb(s, ext_type, 0, in, inlen, NULL, 0, al,
 754                                      arg);
 755 }
 756
 757 static int serverinfoex_srv_add_cb(SSL *s, unsigned int ext_type,
 758                                    unsigned int context,
 759                                    const unsigned char **out,
 760                                    size_t *outlen, X509 *x, size_t chainidx,
 761                                    int *al, void *arg)
 762 {
 763     const unsigned char *serverinfo = NULL;
 764     size_t serverinfo_length = 0;
 765
 766     /* We only support extensions for the first Certificate */
 767     if ((context & SSL_EXT_TLS1_3_CERTIFICATE) != 0 && chainidx > 0)
 768         return 0;
 769
 770     /* Is there serverinfo data for the chosen server cert? */
 771     if ((ssl_get_server_cert_serverinfo(s, &serverinfo,
 772                                         &serverinfo_length)) != 0) {
 773         /* Find the relevant extension from the serverinfo */
 774         int retval = serverinfo_find_extension(serverinfo, serverinfo_length,
 775                                                ext_type, out, outlen);
 776         if (retval == -1) {
 777             *al = SSL_AD_INTERNAL_ERROR;
 778             return -1;          /* Error */
 779         }
 780         if (retval == 0)
 781             return 0;           /* No extension found, don't send extension */
 782         return 1;               /* Send extension */
 783     }
 784     return 0;                   /* No serverinfo data found, don't send
 785                                  * extension */
 786 }
 787
 788 static int serverinfo_srv_add_cb(SSL *s, unsigned int ext_type,
 789                                  const unsigned char **out, size_t *outlen,
 790                                  int *al, void *arg)
 791 {
 792     return serverinfoex_srv_add_cb(s, ext_type, 0, out, outlen, NULL, 0, al,
 793                                    arg);
 794 }
 795
 796 /*
 797  * With a NULL context, this function just checks that the serverinfo data
 798  * parses correctly.  With a non-NULL context, it registers callbacks for
 799  * the included extensions.
 800  */
 801 static int serverinfo_process_buffer(unsigned int version,
 802                                      const unsigned char *serverinfo,
 803                                      size_t serverinfo_length, SSL_CTX *ctx)
 804 {
 805     PACKET pkt;
 806
 807     if (serverinfo == NULL || serverinfo_length == 0)
 808         return 0;
 809
 810     if (version != SSL_SERVERINFOV1 && version != SSL_SERVERINFOV2)
 811         return 0;
 812
 813     if (!PACKET_buf_init(&pkt, serverinfo, serverinfo_length))
 814         return 0;
 815
 816     while (PACKET_remaining(&pkt)) {
 817         unsigned long context = 0;
 818         unsigned int ext_type = 0;
 819         PACKET data;
 820
 821         if ((version == SSL_SERVERINFOV2 && !PACKET_get_net_4(&pkt, &context))
 822                 || !PACKET_get_net_2(&pkt, &ext_type)
 823                 || !PACKET_get_length_prefixed_2(&pkt, &data))
 824             return 0;
 825
 826         if (ctx == NULL)
 827             continue;
 828
 829         /*
 830          * The old style custom extensions API could be set separately for
 831          * server/client, i.e. you could set one custom extension for a client,
 832          * and *for the same extension in the same SSL_CTX* you could set a
 833          * custom extension for the server as well. It seems quite weird to be
 834          * setting a custom extension for both client and server in a single
 835          * SSL_CTX - but theoretically possible. This isn't possible in the
 836          * new API. Therefore, if we have V1 serverinfo we use the old API. We
 837          * also use the old API even if we have V2 serverinfo but the context
 838          * looks like an old style <= TLSv1.2 extension.
 839          */
 840         if (version == SSL_SERVERINFOV1 || context == SYNTHV1CONTEXT) {
 841             if (!SSL_CTX_add_server_custom_ext(ctx, ext_type,
 842                                                serverinfo_srv_add_cb,
 843                                                NULL, NULL,
 844                                                serverinfo_srv_parse_cb,
 845                                                NULL))
 846                 return 0;
 847         } else {
 848             if (!SSL_CTX_add_custom_ext(ctx, ext_type, context,
 849                                         serverinfoex_srv_add_cb,
 850                                         NULL, NULL,
 851                                         serverinfoex_srv_parse_cb,
 852                                         NULL))
 853                 return 0;
 854         }
 855     }
 856
 857     return 1;
 858 }
 859
 860 int SSL_CTX_use_serverinfo_ex(SSL_CTX *ctx, unsigned int version,
 861                               const unsigned char *serverinfo,
 862                               size_t serverinfo_length)
 863 {
 864     unsigned char *new_serverinfo;
 865
 866     if (ctx == NULL || serverinfo == NULL || serverinfo_length == 0) {
 867         SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_EX, ERR_R_PASSED_NULL_PARAMETER);
 868         return 0;
 869     }
 870     if (!serverinfo_process_buffer(version, serverinfo, serverinfo_length,
 871                                    NULL)) {
 872         SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_EX, SSL_R_INVALID_SERVERINFO_DATA);
 873         return 0;
 874     }
 875     if (ctx->cert->key == NULL) {
 876         SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_EX, ERR_R_INTERNAL_ERROR);
 877         return 0;
 878     }
 879     new_serverinfo = OPENSSL_realloc(ctx->cert->key->serverinfo,
 880                                      serverinfo_length);
 881     if (new_serverinfo == NULL) {
 882         SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_EX, ERR_R_MALLOC_FAILURE);
 883         return 0;
 884     }
 885     ctx->cert->key->serverinfo = new_serverinfo;
 886     memcpy(ctx->cert->key->serverinfo, serverinfo, serverinfo_length);
 887     ctx->cert->key->serverinfo_length = serverinfo_length;
 888
 889     /*
 890      * Now that the serverinfo is validated and stored, go ahead and
 891      * register callbacks.
 892      */
 893     if (!serverinfo_process_buffer(version, serverinfo, serverinfo_length,
 894                                    ctx)) {
 895         SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_EX, SSL_R_INVALID_SERVERINFO_DATA);
 896         return 0;
 897     }
 898     return 1;
 899 }
 900
 901 int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo,
 902                            size_t serverinfo_length)
 903 {
 904     return SSL_CTX_use_serverinfo_ex(ctx, SSL_SERVERINFOV1, serverinfo,
 905                                      serverinfo_length);
 906 }
 907
 908 int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file)
 909 {
 910     unsigned char *serverinfo = NULL;
 911     unsigned char *tmp;
 912     size_t serverinfo_length = 0;
 913     unsigned char *extension = 0;
 914     long extension_length = 0;
 915     char *name = NULL;
 916     char *header = NULL;
 917     char namePrefix1[] = "SERVERINFO FOR ";
 918     char namePrefix2[] = "SERVERINFOV2 FOR ";
 919     int ret = 0;
 920     BIO *bin = NULL;
 921     size_t num_extensions = 0, contextoff = 0;
 922
 923     if (ctx == NULL || file == NULL) {
 924         SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_PASSED_NULL_PARAMETER);
 925         goto end;
 926     }
 927
 928     bin = BIO_new(BIO_s_file());
 929     if (bin == NULL) {
 930         SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_BUF_LIB);
 931         goto end;
 932     }
 933     if (BIO_read_filename(bin, file) <= 0) {
 934         SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_SYS_LIB);
 935         goto end;
 936     }
 937
 938     for (num_extensions = 0;; num_extensions++) {
 939         unsigned int version;
 940
 941         if (PEM_read_bio(bin, &name, &header, &extension, &extension_length)
 942             == 0) {
 943             /*
 944              * There must be at least one extension in this file
 945              */
 946             if (num_extensions == 0) {
 947                 SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
 948                        SSL_R_NO_PEM_EXTENSIONS);
 949                 goto end;
 950             } else              /* End of file, we're done */
 951                 break;
 952         }
 953         /* Check that PEM name starts with "BEGIN SERVERINFO FOR " */
 954         if (strlen(name) < strlen(namePrefix1)) {
 955             SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, SSL_R_PEM_NAME_TOO_SHORT);
 956             goto end;
 957         }
 958         if (strncmp(name, namePrefix1, strlen(namePrefix1)) == 0) {
 959             version = SSL_SERVERINFOV1;
 960         } else {
 961             if (strlen(name) < strlen(namePrefix2)) {
 962                 SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
 963                        SSL_R_PEM_NAME_TOO_SHORT);
 964                 goto end;
 965             }
 966             if (strncmp(name, namePrefix2, strlen(namePrefix2)) != 0) {
 967                 SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
 968                        SSL_R_PEM_NAME_BAD_PREFIX);
 969                 goto end;
 970             }
 971             version = SSL_SERVERINFOV2;
 972         }
 973         /*
 974          * Check that the decoded PEM data is plausible (valid length field)
 975          */
 976         if (version == SSL_SERVERINFOV1) {
 977             /* 4 byte header: 2 bytes type, 2 bytes len */
 978             if (extension_length < 4
 979                     || (extension[2] << 8) + extension[3]
 980                        != extension_length - 4) {
 981                 SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, SSL_R_BAD_DATA);
 982                 goto end;
 983             }
 984             /*
 985              * File does not have a context value so we must take account of
 986              * this later.
 987              */
 988             contextoff = 4;
 989         } else {
 990             /* 8 byte header: 4 bytes context, 2 bytes type, 2 bytes len */
 991             if (extension_length < 8
 992                     || (extension[6] << 8) + extension[7]
 993                        != extension_length - 8) {
 994                 SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, SSL_R_BAD_DATA);
 995                 goto end;
 996             }
 997         }
 998         /* Append the decoded extension to the serverinfo buffer */
 999         tmp = OPENSSL_realloc(serverinfo, serverinfo_length + extension_length
1000                                           + contextoff);
1001         if (tmp == NULL) {
1002             SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_MALLOC_FAILURE);
1003             goto end;
1004         }
1005         serverinfo = tmp;
1006         if (contextoff > 0) {
1007             unsigned char *sinfo = serverinfo + serverinfo_length;
1008
1009             /* We know this only uses the last 2 bytes */
1010             sinfo[0] = 0;
1011             sinfo[1] = 0;
1012             sinfo[2] = (SYNTHV1CONTEXT >> 8) & 0xff;
1013             sinfo[3] = SYNTHV1CONTEXT & 0xff;
1014         }
1015         memcpy(serverinfo + serverinfo_length + contextoff,
1016                extension, extension_length);
1017         serverinfo_length += extension_length + contextoff;
1018
1019         OPENSSL_free(name);
1020         name = NULL;
1021         OPENSSL_free(header);
1022         header = NULL;
1023         OPENSSL_free(extension);
1024         extension = NULL;
1025     }
1026
1027     ret = SSL_CTX_use_serverinfo_ex(ctx, SSL_SERVERINFOV2, serverinfo,
1028                                     serverinfo_length);
1029  end:
1030     /* SSL_CTX_use_serverinfo makes a local copy of the serverinfo. */
1031     OPENSSL_free(name);
1032     OPENSSL_free(header);
1033     OPENSSL_free(extension);
1034     OPENSSL_free(serverinfo);
1035     BIO_free(bin);
1036     return ret;
1037 }
1038
1039 static int ssl_set_cert_and_key(SSL *ssl, SSL_CTX *ctx, X509 *x509, EVP_PKEY *privatekey,
1040                                 STACK_OF(X509) *chain, int override)
1041 {
1042     int ret = 0;
1043     size_t i;
1044     int j;
1045     int rv;
1046     CERT *c = ssl != NULL ? ssl->cert : ctx->cert;
1047     STACK_OF(X509) *dup_chain = NULL;
1048     EVP_PKEY *pubkey = NULL;
1049
1050     /* Do all security checks before anything else */
1051     rv = ssl_security_cert(ssl, ctx, x509, 0, 1);
1052     if (rv != 1) {
1053         SSLerr(SSL_F_SSL_SET_CERT_AND_KEY, rv);
1054         goto out;
1055     }
1056     for (j = 0; j < sk_X509_num(chain); j++) {
1057         rv = ssl_security_cert(ssl, ctx, sk_X509_value(chain, j), 0, 0);
1058         if (rv != 1) {
1059             SSLerr(SSL_F_SSL_SET_CERT_AND_KEY, rv);
1060             goto out;
1061         }
1062     }
1063
1064     pubkey = X509_get_pubkey(x509); /* bumps reference */
1065     if (pubkey == NULL)
1066         goto out;
1067     if (privatekey == NULL) {
1068         privatekey = pubkey;
1069     } else {
1070         /* For RSA, which has no parameters, missing returns 0 */
1071         if (EVP_PKEY_missing_parameters(privatekey)) {
1072             if (EVP_PKEY_missing_parameters(pubkey)) {
1073                 /* nobody has parameters? - error */
1074                 SSLerr(SSL_F_SSL_SET_CERT_AND_KEY, SSL_R_MISSING_PARAMETERS);
1075                 goto out;
1076             } else {
1077                 /* copy to privatekey from pubkey */
1078                 EVP_PKEY_copy_parameters(privatekey, pubkey);
1079             }
1080         } else if (EVP_PKEY_missing_parameters(pubkey)) {
1081             /* copy to pubkey from privatekey */
1082             EVP_PKEY_copy_parameters(pubkey, privatekey);
1083         } /* else both have parameters */
1084
1085         /* Copied from ssl_set_cert/pkey */
1086 #ifndef OPENSSL_NO_RSA
1087         if ((EVP_PKEY_id(privatekey) == EVP_PKEY_RSA) &&
1088             ((RSA_flags(EVP_PKEY_get0_RSA(privatekey)) & RSA_METHOD_FLAG_NO_CHECK)))
1089             /* no-op */ ;
1090         else
1091 #endif
1092         /* check that key <-> cert match */
1093         if (EVP_PKEY_cmp(pubkey, privatekey) != 1) {
1094             SSLerr(SSL_F_SSL_SET_CERT_AND_KEY, SSL_R_PRIVATE_KEY_MISMATCH);
1095             goto out;
1096         }
1097     }
1098     if (ssl_cert_lookup_by_pkey(pubkey, &i) == NULL) {
1099         SSLerr(SSL_F_SSL_SET_CERT_AND_KEY, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1100         goto out;
1101     }
1102
1103     if (!override && (c->pkeys[i].x509 != NULL
1104                       || c->pkeys[i].privatekey != NULL
1105                       || c->pkeys[i].chain != NULL)) {
1106         /* No override, and something already there */
1107         SSLerr(SSL_F_SSL_SET_CERT_AND_KEY, SSL_R_NOT_REPLACING_CERTIFICATE);
1108         goto out;
1109     }
1110
1111     if (chain != NULL) {
1112         dup_chain = X509_chain_up_ref(chain);
1113         if  (dup_chain == NULL) {
1114             SSLerr(SSL_F_SSL_SET_CERT_AND_KEY, ERR_R_MALLOC_FAILURE);
1115             goto out;
1116         }
1117     }
1118
1119     sk_X509_pop_free(c->pkeys[i].chain, X509_free);
1120     c->pkeys[i].chain = dup_chain;
1121
1122     X509_free(c->pkeys[i].x509);
1123     X509_up_ref(x509);
1124     c->pkeys[i].x509 = x509;
1125
1126     EVP_PKEY_free(c->pkeys[i].privatekey);
1127     EVP_PKEY_up_ref(privatekey);
1128     c->pkeys[i].privatekey = privatekey;
1129
1130     c->key = &(c->pkeys[i]);
1131
1132     ret = 1;
1133  out:
1134     EVP_PKEY_free(pubkey);
1135     return ret;
1136 }
1137
1138 int SSL_use_cert_and_key(SSL *ssl, X509 *x509, EVP_PKEY *privatekey,
1139                          STACK_OF(X509) *chain, int override)
1140 {
1141     return ssl_set_cert_and_key(ssl, NULL, x509, privatekey, chain, override);
1142 }
1143
1144 int SSL_CTX_use_cert_and_key(SSL_CTX *ctx, X509 *x509, EVP_PKEY *privatekey,
1145                              STACK_OF(X509) *chain, int override)
1146 {
1147     return ssl_set_cert_and_key(NULL, ctx, x509, privatekey, chain, override);
1148 }