test/tls13secretstest.c

   1 /*
   2  * Copyright 2016-2017 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 #include <openssl/ssl.h>
  11 #include <openssl/evp.h>
  12
  13 #ifdef __VMS
  14 # pragma names save
  15 # pragma names as_is,shortened
  16 #endif
  17
  18 #include "../ssl/ssl_locl.h"
  19
  20 #ifdef __VMS
  21 # pragma names restore
  22 #endif
  23
  24 #include "testutil.h"
  25
  26 #define IVLEN   12
  27 #define KEYLEN  16
  28
  29 /* The following are self-generated test vectors. This gives us very little
  30  * confidence that we've got the implementation right, but at least tells us
  31  * if we accidentally  break something in the future. Until we can get some
  32  * other source of test vectors this is all we've got.
  33  * TODO(TLS1.3): As and when official vectors become available we should use
  34  * those, e.g. see
  35  * https://www.ietf.org/id/draft-thomson-tls-tls13-vectors-00.txt, however at
  36  * the time of writing these are not suitable because they are based on
  37  * draft -16, which works differently to the draft -20 vectors below.
  38  */
  39
  40 static unsigned char hs_start_hash[] = {
  41 0xec, 0x14, 0x7a, 0x06, 0xde, 0xa3, 0xc8, 0x84, 0x6c, 0x02, 0xb2, 0x23, 0x8e,
  42 0x41, 0xbd, 0xdc, 0x9d, 0x89, 0xf9, 0xae, 0xa1, 0x7b, 0x5e, 0xfd, 0x4d, 0x74,
  43 0x82, 0xaf, 0x75, 0x88, 0x1c, 0x0a
  44 };
  45
  46 static unsigned char hs_full_hash[] = {
  47 0x75, 0x1a, 0x3d, 0x4a, 0x14, 0xdf, 0xab, 0xeb, 0x68, 0xe9, 0x2c, 0xa5, 0x91,
  48 0x8e, 0x24, 0x08, 0xb9, 0xbc, 0xb0, 0x74, 0x89, 0x82, 0xec, 0x9c, 0x32, 0x30,
  49 0xac, 0x30, 0xbb, 0xeb, 0x23, 0xe2,
  50 };
  51
  52 static unsigned char early_secret[] = {
  53 0x33, 0xad, 0x0a, 0x1c, 0x60, 0x7e, 0xc0, 0x3b, 0x09, 0xe6, 0xcd, 0x98, 0x93,
  54 0x68, 0x0c, 0xe2, 0x10, 0xad, 0xf3, 0x00, 0xaa, 0x1f, 0x26, 0x60, 0xe1, 0xb2,
  55 0x2e, 0x10, 0xf1, 0x70, 0xf9, 0x2a
  56 };
  57
  58 static unsigned char ecdhe_secret[] = {
  59 0xe7, 0xb8, 0xfe, 0xf8, 0x90, 0x3b, 0x52, 0x0c, 0xb9, 0xa1, 0x89, 0x71, 0xb6,
  60 0x9d, 0xd4, 0x5d, 0xca, 0x53, 0xce, 0x2f, 0x12, 0xbf, 0x3b, 0xef, 0x93, 0x15,
  61 0xe3, 0x12, 0x71, 0xdf, 0x4b, 0x40
  62 };
  63
  64 static unsigned char handshake_secret[] = {
  65 0xf5, 0x51, 0xd0, 0xbd, 0x9e, 0x6a, 0xc0, 0x95, 0x5f, 0x8e, 0xae, 0xb6, 0x28,
  66 0x2e, 0x8d, 0x9e, 0xf3, 0xd4, 0x08, 0x57, 0x81, 0xbc, 0x9d, 0x80, 0x91, 0x8a,
  67 0x81, 0x33, 0x86, 0x58, 0x7f, 0x46
  68 };
  69
  70 static const char *client_hts_label = "c hs traffic";
  71
  72 static unsigned char client_hts[] = {
  73 0x61, 0x7b, 0x35, 0x07, 0x6b, 0x9d, 0x0e, 0x08, 0xcf, 0x73, 0x1d, 0x94, 0xa8,
  74 0x66, 0x14, 0x78, 0x41, 0x09, 0xef, 0x25, 0x55, 0x51, 0x92, 0x1d, 0xd4, 0x6e,
  75 0x04, 0x01, 0x35, 0xcf, 0x46, 0xab
  76 };
  77
  78 static unsigned char client_hts_key[] = {
  79 0x62, 0xd0, 0xdd, 0x00, 0xf6, 0x96, 0x19, 0xd3, 0xb8, 0x19, 0x3a, 0xb4, 0xa0,
  80 0x95, 0x85, 0xa7
  81 };
  82
  83 static unsigned char client_hts_iv[] = {
  84 0xff, 0xf7, 0x5d, 0xf5, 0xad, 0x35, 0xd5, 0xcb, 0x3c, 0x53, 0xf3, 0xa9
  85 };
  86
  87 static const char *server_hts_label = "s hs traffic";
  88
  89 static unsigned char server_hts[] = {
  90 0xfc, 0xf7, 0xdf, 0xe6, 0x4f, 0xa2, 0xc0, 0x4f, 0x62, 0x35, 0x38, 0x7f, 0x43,
  91 0x4e, 0x01, 0x42, 0x23, 0x36, 0xd9, 0xc0, 0x39, 0xde, 0x68, 0x47, 0xa0, 0xb9,
  92 0xdd, 0xcf, 0x29, 0xa8, 0x87, 0x59
  93 };
  94
  95 static unsigned char server_hts_key[] = {
  96 0x04, 0x67, 0xf3, 0x16, 0xa8, 0x05, 0xb8, 0xc4, 0x97, 0xee, 0x67, 0x04, 0x7b,
  97 0xbc, 0xbc, 0x54
  98 };
  99
 100 static unsigned char server_hts_iv[] = {
 101 0xde, 0x83, 0xa7, 0x3e, 0x9d, 0x81, 0x4b, 0x04, 0xc4, 0x8b, 0x78, 0x09
 102 };
 103
 104 static unsigned char master_secret[] = {
 105 0x34, 0x83, 0x83, 0x84, 0x67, 0x12, 0xe7, 0xff, 0x24, 0xe8, 0x6e, 0x70, 0x56,
 106 0x95, 0x16, 0x71, 0x43, 0x7f, 0x19, 0xd7, 0x85, 0x06, 0x9d, 0x75, 0x70, 0x49,
 107 0x6e, 0x6c, 0xa4, 0x81, 0xf0, 0xb8
 108 };
 109
 110 static const char *client_ats_label = "c ap traffic";
 111
 112 static unsigned char client_ats[] = {
 113 0xc1, 0x4a, 0x6d, 0x79, 0x76, 0xd8, 0x10, 0x2b, 0x5a, 0x0c, 0x99, 0x51, 0x49,
 114 0x3f, 0xee, 0x87, 0xdc, 0xaf, 0xf8, 0x2c, 0x24, 0xca, 0xb2, 0x14, 0xe8, 0xbe,
 115 0x71, 0xa8, 0x20, 0x6d, 0xbd, 0xa5
 116 };
 117
 118 static unsigned char client_ats_key[] = {
 119 0xcc, 0x9f, 0x5f, 0x98, 0x0b, 0x5f, 0x10, 0x30, 0x6c, 0xba, 0xd7, 0xbe, 0x98,
 120 0xd7, 0x57, 0x2e
 121 };
 122
 123 static unsigned char client_ats_iv[] = {
 124 0xb8, 0x09, 0x29, 0xe8, 0xd0, 0x2c, 0x70, 0xf6, 0x11, 0x62, 0xed, 0x6b
 125 };
 126
 127 static const char *server_ats_label = "s ap traffic";
 128
 129 static unsigned char server_ats[] = {
 130 0x2c, 0x90, 0x77, 0x38, 0xd3, 0xf8, 0x37, 0x02, 0xd1, 0xe4, 0x59, 0x8f, 0x48,
 131 0x48, 0x53, 0x1d, 0x9f, 0x93, 0x65, 0x49, 0x1b, 0x9f, 0x7f, 0x52, 0xc8, 0x22,
 132 0x29, 0x0d, 0x4c, 0x23, 0x21, 0x92
 133 };
 134
 135 static unsigned char server_ats_key[] = {
 136 0x0c, 0xb2, 0x95, 0x62, 0xd8, 0xd8, 0x8f, 0x48, 0xb0, 0x2c, 0xbf, 0xbe, 0xd7,
 137 0xe6, 0x2b, 0xb3
 138 };
 139
 140 static unsigned char server_ats_iv[] = {
 141 0x0d, 0xb2, 0x8f, 0x98, 0x85, 0x86, 0xa1, 0xb7, 0xe4, 0xd5, 0xc6, 0x9c
 142 };
 143
 144 /* Mocked out implementations of various functions */
 145 int ssl3_digest_cached_records(SSL *s, int keep)
 146 {
 147     return 1;
 148 }
 149
 150 static int full_hash = 0;
 151
 152 /* Give a hash of the currently set handshake */
 153 int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
 154                        size_t *hashlen)
 155 {
 156     if (sizeof(hs_start_hash) > outlen
 157             || sizeof(hs_full_hash) != sizeof(hs_start_hash))
 158         return 0;
 159
 160     if (full_hash) {
 161         memcpy(out, hs_full_hash, sizeof(hs_full_hash));
 162         *hashlen = sizeof(hs_full_hash);
 163     } else {
 164         memcpy(out, hs_start_hash, sizeof(hs_start_hash));
 165         *hashlen = sizeof(hs_start_hash);
 166     }
 167
 168     return 1;
 169 }
 170
 171 const EVP_MD *ssl_handshake_md(SSL *s)
 172 {
 173     return EVP_sha256();
 174 }
 175
 176 void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl)
 177 {
 178 }
 179
 180 void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl)
 181 {
 182 }
 183
 184 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 185                        const EVP_MD **md, int *mac_pkey_type,
 186                        size_t *mac_secret_size, SSL_COMP **comp, int use_etm)
 187
 188 {
 189     return 0;
 190 }
 191
 192 int tls1_alert_code(int code)
 193 {
 194     return code;
 195 }
 196
 197 int ssl_log_secret(SSL *ssl,
 198                    const char *label,
 199                    const uint8_t *secret,
 200                    size_t secret_len)
 201 {
 202     return 1;
 203 }
 204
 205 const EVP_MD *ssl_md(int idx)
 206 {
 207     return EVP_sha256();
 208 }
 209
 210 void ossl_statem_fatal(SSL *s, int al, int func, int reason, const char *file,
 211                            int line)
 212 {
 213 }
 214
 215 /* End of mocked out code */
 216
 217 static int test_secret(SSL *s, unsigned char *prk,
 218                        const unsigned char *label, size_t labellen,
 219                        const unsigned char *ref_secret,
 220                        const unsigned char *ref_key, const unsigned char *ref_iv)
 221 {
 222     size_t hashsize;
 223     unsigned char gensecret[EVP_MAX_MD_SIZE];
 224     unsigned char hash[EVP_MAX_MD_SIZE];
 225     unsigned char key[KEYLEN];
 226     unsigned char iv[IVLEN];
 227     const EVP_MD *md = ssl_handshake_md(s);
 228
 229     if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashsize)) {
 230         TEST_error("Failed to get hash");
 231         return 0;
 232     }
 233
 234     if (!tls13_hkdf_expand(s, md, prk, label, labellen, hash, hashsize,
 235                            gensecret, hashsize)) {
 236         TEST_error("Secret generation failed");
 237         return 0;
 238     }
 239
 240     if (!TEST_mem_eq(gensecret, hashsize, ref_secret, hashsize))
 241         return 0;
 242
 243     if (!tls13_derive_key(s, md, gensecret, key, KEYLEN)) {
 244         TEST_error("Key generation failed");
 245         return 0;
 246     }
 247
 248     if (!TEST_mem_eq(key, KEYLEN, ref_key, KEYLEN))
 249         return 0;
 250
 251     if (!tls13_derive_iv(s, md, gensecret, iv, IVLEN)) {
 252         TEST_error("IV generation failed");
 253         return 0;
 254     }
 255
 256     if (!TEST_mem_eq(iv, IVLEN, ref_iv, IVLEN))
 257         return 0;
 258
 259     return 1;
 260 }
 261
 262 static int test_handshake_secrets(void)
 263 {
 264     SSL_CTX *ctx = NULL;
 265     SSL *s = NULL;
 266     int ret = 0;
 267     size_t hashsize;
 268     unsigned char out_master_secret[EVP_MAX_MD_SIZE];
 269     size_t master_secret_length;
 270
 271     ctx = SSL_CTX_new(TLS_method());
 272     if (!TEST_ptr(ctx))
 273         goto err;
 274
 275     s = SSL_new(ctx);
 276     if (!TEST_ptr(s ))
 277         goto err;
 278
 279     s->session = SSL_SESSION_new();
 280     if (!TEST_ptr(s->session))
 281         goto err;
 282
 283     if (!TEST_true(tls13_generate_secret(s, ssl_handshake_md(s), NULL, NULL, 0,
 284                                          (unsigned char *)&s->early_secret))) {
 285         TEST_info("Early secret generation failed");
 286         goto err;
 287     }
 288
 289     if (!TEST_mem_eq(s->early_secret, sizeof(early_secret),
 290                      early_secret, sizeof(early_secret))) {
 291         TEST_info("Early secret does not match");
 292         goto err;
 293     }
 294
 295     if (!TEST_true(tls13_generate_handshake_secret(s, ecdhe_secret,
 296                                                    sizeof(ecdhe_secret)))) {
 297         TEST_info("Handshake secret generation failed");
 298         goto err;
 299     }
 300
 301     if (!TEST_mem_eq(s->handshake_secret, sizeof(handshake_secret),
 302                      handshake_secret, sizeof(handshake_secret)))
 303         goto err;
 304
 305     hashsize = EVP_MD_size(ssl_handshake_md(s));
 306     if (!TEST_size_t_eq(sizeof(client_hts), hashsize))
 307         goto err;
 308     if (!TEST_size_t_eq(sizeof(client_hts_key), KEYLEN))
 309         goto err;
 310     if (!TEST_size_t_eq(sizeof(client_hts_iv), IVLEN))
 311         goto err;
 312
 313     if (!TEST_true(test_secret(s, s->handshake_secret,
 314                                (unsigned char *)client_hts_label,
 315                                strlen(client_hts_label), client_hts,
 316                                client_hts_key, client_hts_iv))) {
 317         TEST_info("Client handshake secret test failed");
 318         goto err;
 319     }
 320
 321     if (!TEST_size_t_eq(sizeof(server_hts), hashsize))
 322         goto err;
 323     if (!TEST_size_t_eq(sizeof(server_hts_key), KEYLEN))
 324         goto err;
 325     if (!TEST_size_t_eq(sizeof(server_hts_iv), IVLEN))
 326         goto err;
 327
 328     if (!TEST_true(test_secret(s, s->handshake_secret,
 329                                (unsigned char *)server_hts_label,
 330                                strlen(server_hts_label), server_hts,
 331                                server_hts_key, server_hts_iv))) {
 332         TEST_info("Server handshake secret test failed");
 333         goto err;
 334     }
 335
 336     /*
 337      * Ensure the mocked out ssl_handshake_hash() returns the full handshake
 338      * hash.
 339      */
 340     full_hash = 1;
 341
 342     if (!TEST_true(tls13_generate_master_secret(s, out_master_secret,
 343                                                 s->handshake_secret, hashsize,
 344                                                 &master_secret_length))) {
 345         TEST_info("Master secret generation failed");
 346         goto err;
 347     }
 348
 349     if (!TEST_mem_eq(out_master_secret, master_secret_length,
 350                      master_secret, sizeof(master_secret))) {
 351         TEST_info("Master secret does not match");
 352         goto err;
 353     }
 354
 355     if (!TEST_size_t_eq(sizeof(client_ats), hashsize))
 356         goto err;
 357     if (!TEST_size_t_eq(sizeof(client_ats_key), KEYLEN))
 358         goto err;
 359     if (!TEST_size_t_eq(sizeof(client_ats_iv), IVLEN))
 360         goto err;
 361
 362     if (!TEST_true(test_secret(s, out_master_secret,
 363                                (unsigned char *)client_ats_label,
 364                                strlen(client_ats_label), client_ats,
 365                                client_ats_key, client_ats_iv))) {
 366         TEST_info("Client application data secret test failed");
 367         goto err;
 368     }
 369
 370     if (!TEST_size_t_eq(sizeof(server_ats), hashsize))
 371         goto err;
 372     if (!TEST_size_t_eq(sizeof(server_ats_key), KEYLEN))
 373         goto err;
 374     if (!TEST_size_t_eq(sizeof(server_ats_iv), IVLEN))
 375         goto err;
 376
 377     if (!TEST_true(test_secret(s, out_master_secret,
 378                                (unsigned char *)server_ats_label,
 379                                strlen(server_ats_label), server_ats,
 380                                server_ats_key, server_ats_iv))) {
 381         TEST_info("Server application data secret test failed");
 382         goto err;
 383     }
 384
 385     ret = 1;
 386  err:
 387     SSL_free(s);
 388     SSL_CTX_free(ctx);
 389     return ret;
 390 }
 391
 392 int setup_tests()
 393 {
 394     ADD_TEST(test_handshake_secrets);
 395     return 1;
 396 }