1/* 2 * Copyright 2016-2021 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 <openssl/ssl.h> 11#include <openssl/evp.h> 12 13#include "../ssl/ssl_local.h" 14#include "testutil.h" 15 16#define IVLEN 12 17#define KEYLEN 16 18 19/* 20 * Based on the test vectors available in: 21 * https://tools.ietf.org/html/draft-ietf-tls-tls13-vectors-06 22 */ 23 24static unsigned char hs_start_hash[] = { 250xc6, 0xc9, 0x18, 0xad, 0x2f, 0x41, 0x99, 0xd5, 0x59, 0x8e, 0xaf, 0x01, 0x16, 260xcb, 0x7a, 0x5c, 0x2c, 0x14, 0xcb, 0x54, 0x78, 0x12, 0x18, 0x88, 0x8d, 0xb7, 270x03, 0x0d, 0xd5, 0x0d, 0x5e, 0x6d 28}; 29 30static unsigned char hs_full_hash[] = { 310xf8, 0xc1, 0x9e, 0x8c, 0x77, 0xc0, 0x38, 0x79, 0xbb, 0xc8, 0xeb, 0x6d, 0x56, 320xe0, 0x0d, 0xd5, 0xd8, 0x6e, 0xf5, 0x59, 0x27, 0xee, 0xfc, 0x08, 0xe1, 0xb0, 330x02, 0xb6, 0xec, 0xe0, 0x5d, 0xbf 34}; 35 36static unsigned char early_secret[] = { 370x33, 0xad, 0x0a, 0x1c, 0x60, 0x7e, 0xc0, 0x3b, 0x09, 0xe6, 0xcd, 0x98, 0x93, 380x68, 0x0c, 0xe2, 0x10, 0xad, 0xf3, 0x00, 0xaa, 0x1f, 0x26, 0x60, 0xe1, 0xb2, 390x2e, 0x10, 0xf1, 0x70, 0xf9, 0x2a 40}; 41 42static unsigned char ecdhe_secret[] = { 430x81, 0x51, 0xd1, 0x46, 0x4c, 0x1b, 0x55, 0x53, 0x36, 0x23, 0xb9, 0xc2, 0x24, 440x6a, 0x6a, 0x0e, 0x6e, 0x7e, 0x18, 0x50, 0x63, 0xe1, 0x4a, 0xfd, 0xaf, 0xf0, 450xb6, 0xe1, 0xc6, 0x1a, 0x86, 0x42 46}; 47 48static unsigned char handshake_secret[] = { 490x5b, 0x4f, 0x96, 0x5d, 0xf0, 0x3c, 0x68, 0x2c, 0x46, 0xe6, 0xee, 0x86, 0xc3, 500x11, 0x63, 0x66, 0x15, 0xa1, 0xd2, 0xbb, 0xb2, 0x43, 0x45, 0xc2, 0x52, 0x05, 510x95, 0x3c, 0x87, 0x9e, 0x8d, 0x06 52}; 53 54static const char *client_hts_label = "c hs traffic"; 55 56static unsigned char client_hts[] = { 570xe2, 0xe2, 0x32, 0x07, 0xbd, 0x93, 0xfb, 0x7f, 0xe4, 0xfc, 0x2e, 0x29, 0x7a, 580xfe, 0xab, 0x16, 0x0e, 0x52, 0x2b, 0x5a, 0xb7, 0x5d, 0x64, 0xa8, 0x6e, 0x75, 590xbc, 0xac, 0x3f, 0x3e, 0x51, 0x03 60}; 61 62static unsigned char client_hts_key[] = { 630x26, 0x79, 0xa4, 0x3e, 0x1d, 0x76, 0x78, 0x40, 0x34, 0xea, 0x17, 0x97, 0xd5, 640xad, 0x26, 0x49 65}; 66 67static unsigned char client_hts_iv[] = { 680x54, 0x82, 0x40, 0x52, 0x90, 0xdd, 0x0d, 0x2f, 0x81, 0xc0, 0xd9, 0x42 69}; 70 71static const char *server_hts_label = "s hs traffic"; 72 73static unsigned char server_hts[] = { 740x3b, 0x7a, 0x83, 0x9c, 0x23, 0x9e, 0xf2, 0xbf, 0x0b, 0x73, 0x05, 0xa0, 0xe0, 750xc4, 0xe5, 0xa8, 0xc6, 0xc6, 0x93, 0x30, 0xa7, 0x53, 0xb3, 0x08, 0xf5, 0xe3, 760xa8, 0x3a, 0xa2, 0xef, 0x69, 0x79 77}; 78 79static unsigned char server_hts_key[] = { 800xc6, 0x6c, 0xb1, 0xae, 0xc5, 0x19, 0xdf, 0x44, 0xc9, 0x1e, 0x10, 0x99, 0x55, 810x11, 0xac, 0x8b 82}; 83 84static unsigned char server_hts_iv[] = { 850xf7, 0xf6, 0x88, 0x4c, 0x49, 0x81, 0x71, 0x6c, 0x2d, 0x0d, 0x29, 0xa4 86}; 87 88static unsigned char master_secret[] = { 890x5c, 0x79, 0xd1, 0x69, 0x42, 0x4e, 0x26, 0x2b, 0x56, 0x32, 0x03, 0x62, 0x7b, 900xe4, 0xeb, 0x51, 0x03, 0x3f, 0x58, 0x8c, 0x43, 0xc9, 0xce, 0x03, 0x73, 0x37, 910x2d, 0xbc, 0xbc, 0x01, 0x85, 0xa7 92}; 93 94static const char *client_ats_label = "c ap traffic"; 95 96static unsigned char client_ats[] = { 970xe2, 0xf0, 0xdb, 0x6a, 0x82, 0xe8, 0x82, 0x80, 0xfc, 0x26, 0xf7, 0x3c, 0x89, 980x85, 0x4e, 0xe8, 0x61, 0x5e, 0x25, 0xdf, 0x28, 0xb2, 0x20, 0x79, 0x62, 0xfa, 990x78, 0x22, 0x26, 0xb2, 0x36, 0x26 100}; 101 102static unsigned char client_ats_key[] = { 1030x88, 0xb9, 0x6a, 0xd6, 0x86, 0xc8, 0x4b, 0xe5, 0x5a, 0xce, 0x18, 0xa5, 0x9c, 1040xce, 0x5c, 0x87 105}; 106 107static unsigned char client_ats_iv[] = { 1080xb9, 0x9d, 0xc5, 0x8c, 0xd5, 0xff, 0x5a, 0xb0, 0x82, 0xfd, 0xad, 0x19 109}; 110 111static const char *server_ats_label = "s ap traffic"; 112 113static unsigned char server_ats[] = { 1140x5b, 0x73, 0xb1, 0x08, 0xd9, 0xac, 0x1b, 0x9b, 0x0c, 0x82, 0x48, 0xca, 0x39, 1150x26, 0xec, 0x6e, 0x7b, 0xc4, 0x7e, 0x41, 0x17, 0x06, 0x96, 0x39, 0x87, 0xec, 1160x11, 0x43, 0x5d, 0x30, 0x57, 0x19 117}; 118 119static unsigned char server_ats_key[] = { 1200xa6, 0x88, 0xeb, 0xb5, 0xac, 0x82, 0x6d, 0x6f, 0x42, 0xd4, 0x5c, 0x0c, 0xc4, 1210x4b, 0x9b, 0x7d 122}; 123 124static unsigned char server_ats_iv[] = { 1250xc1, 0xca, 0xd4, 0x42, 0x5a, 0x43, 0x8b, 0x5d, 0xe7, 0x14, 0x83, 0x0a 126}; 127 128/* Mocked out implementations of various functions */ 129int ssl3_digest_cached_records(SSL *s, int keep) 130{ 131 return 1; 132} 133 134static int full_hash = 0; 135 136/* Give a hash of the currently set handshake */ 137int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen, 138 size_t *hashlen) 139{ 140 if (sizeof(hs_start_hash) > outlen 141 || sizeof(hs_full_hash) != sizeof(hs_start_hash)) 142 return 0; 143 144 if (full_hash) { 145 memcpy(out, hs_full_hash, sizeof(hs_full_hash)); 146 *hashlen = sizeof(hs_full_hash); 147 } else { 148 memcpy(out, hs_start_hash, sizeof(hs_start_hash)); 149 *hashlen = sizeof(hs_start_hash); 150 } 151 152 return 1; 153} 154 155const EVP_MD *ssl_handshake_md(SSL *s) 156{ 157 return EVP_sha256(); 158} 159 160void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) 161{ 162} 163 164void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) 165{ 166} 167 168int ssl_cipher_get_evp_cipher(SSL_CTX *ctx, const SSL_CIPHER *sslc, 169 const EVP_CIPHER **enc) 170{ 171 return 0; 172} 173 174int ssl_cipher_get_evp(SSL_CTX *ctx, const SSL_SESSION *s, 175 const EVP_CIPHER **enc, const EVP_MD **md, 176 int *mac_pkey_type, size_t *mac_secret_size, 177 SSL_COMP **comp, int use_etm) 178 179{ 180 return 0; 181} 182 183int tls1_alert_code(int code) 184{ 185 return code; 186} 187 188int ssl_log_secret(SSL *ssl, 189 const char *label, 190 const uint8_t *secret, 191 size_t secret_len) 192{ 193 return 1; 194} 195 196const EVP_MD *ssl_md(SSL_CTX *ctx, int idx) 197{ 198 return EVP_sha256(); 199} 200 201void ossl_statem_send_fatal(SSL *s, int al) 202{ 203} 204 205void ossl_statem_fatal(SSL *s, int al, int reason, const char *fmt, ...) 206{ 207} 208 209int ossl_statem_export_allowed(SSL *s) 210{ 211 return 1; 212} 213 214int ossl_statem_export_early_allowed(SSL *s) 215{ 216 return 1; 217} 218 219void ssl_evp_cipher_free(const EVP_CIPHER *cipher) 220{ 221} 222 223void ssl_evp_md_free(const EVP_MD *md) 224{ 225} 226 227/* End of mocked out code */ 228 229static int test_secret(SSL *s, unsigned char *prk, 230 const unsigned char *label, size_t labellen, 231 const unsigned char *ref_secret, 232 const unsigned char *ref_key, const unsigned char *ref_iv) 233{ 234 size_t hashsize; 235 unsigned char gensecret[EVP_MAX_MD_SIZE]; 236 unsigned char hash[EVP_MAX_MD_SIZE]; 237 unsigned char key[KEYLEN]; 238 unsigned char iv[IVLEN]; 239 const EVP_MD *md = ssl_handshake_md(s); 240 241 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashsize)) { 242 TEST_error("Failed to get hash"); 243 return 0; 244 } 245 246 if (!tls13_hkdf_expand(s, md, prk, label, labellen, hash, hashsize, 247 gensecret, hashsize, 1)) { 248 TEST_error("Secret generation failed"); 249 return 0; 250 } 251 252 if (!TEST_mem_eq(gensecret, hashsize, ref_secret, hashsize)) 253 return 0; 254 255 if (!tls13_derive_key(s, md, gensecret, key, KEYLEN)) { 256 TEST_error("Key generation failed"); 257 return 0; 258 } 259 260 if (!TEST_mem_eq(key, KEYLEN, ref_key, KEYLEN)) 261 return 0; 262 263 if (!tls13_derive_iv(s, md, gensecret, iv, IVLEN)) { 264 TEST_error("IV generation failed"); 265 return 0; 266 } 267 268 if (!TEST_mem_eq(iv, IVLEN, ref_iv, IVLEN)) 269 return 0; 270 271 return 1; 272} 273 274static int test_handshake_secrets(void) 275{ 276 SSL_CTX *ctx = NULL; 277 SSL *s = NULL; 278 int ret = 0; 279 size_t hashsize; 280 unsigned char out_master_secret[EVP_MAX_MD_SIZE]; 281 size_t master_secret_length; 282 283 ctx = SSL_CTX_new(TLS_method()); 284 if (!TEST_ptr(ctx)) 285 goto err; 286 287 s = SSL_new(ctx); 288 if (!TEST_ptr(s )) 289 goto err; 290 291 s->session = SSL_SESSION_new(); 292 if (!TEST_ptr(s->session)) 293 goto err; 294 295 if (!TEST_true(tls13_generate_secret(s, ssl_handshake_md(s), NULL, NULL, 0, 296 (unsigned char *)&s->early_secret))) { 297 TEST_info("Early secret generation failed"); 298 goto err; 299 } 300 301 if (!TEST_mem_eq(s->early_secret, sizeof(early_secret), 302 early_secret, sizeof(early_secret))) { 303 TEST_info("Early secret does not match"); 304 goto err; 305 } 306 307 if (!TEST_true(tls13_generate_handshake_secret(s, ecdhe_secret, 308 sizeof(ecdhe_secret)))) { 309 TEST_info("Handshake secret generation failed"); 310 goto err; 311 } 312 313 if (!TEST_mem_eq(s->handshake_secret, sizeof(handshake_secret), 314 handshake_secret, sizeof(handshake_secret))) 315 goto err; 316 317 hashsize = EVP_MD_get_size(ssl_handshake_md(s)); 318 if (!TEST_size_t_eq(sizeof(client_hts), hashsize)) 319 goto err; 320 if (!TEST_size_t_eq(sizeof(client_hts_key), KEYLEN)) 321 goto err; 322 if (!TEST_size_t_eq(sizeof(client_hts_iv), IVLEN)) 323 goto err; 324 325 if (!TEST_true(test_secret(s, s->handshake_secret, 326 (unsigned char *)client_hts_label, 327 strlen(client_hts_label), client_hts, 328 client_hts_key, client_hts_iv))) { 329 TEST_info("Client handshake secret test failed"); 330 goto err; 331 } 332 333 if (!TEST_size_t_eq(sizeof(server_hts), hashsize)) 334 goto err; 335 if (!TEST_size_t_eq(sizeof(server_hts_key), KEYLEN)) 336 goto err; 337 if (!TEST_size_t_eq(sizeof(server_hts_iv), IVLEN)) 338 goto err; 339 340 if (!TEST_true(test_secret(s, s->handshake_secret, 341 (unsigned char *)server_hts_label, 342 strlen(server_hts_label), server_hts, 343 server_hts_key, server_hts_iv))) { 344 TEST_info("Server handshake secret test failed"); 345 goto err; 346 } 347 348 /* 349 * Ensure the mocked out ssl_handshake_hash() returns the full handshake 350 * hash. 351 */ 352 full_hash = 1; 353 354 if (!TEST_true(tls13_generate_master_secret(s, out_master_secret, 355 s->handshake_secret, hashsize, 356 &master_secret_length))) { 357 TEST_info("Master secret generation failed"); 358 goto err; 359 } 360 361 if (!TEST_mem_eq(out_master_secret, master_secret_length, 362 master_secret, sizeof(master_secret))) { 363 TEST_info("Master secret does not match"); 364 goto err; 365 } 366 367 if (!TEST_size_t_eq(sizeof(client_ats), hashsize)) 368 goto err; 369 if (!TEST_size_t_eq(sizeof(client_ats_key), KEYLEN)) 370 goto err; 371 if (!TEST_size_t_eq(sizeof(client_ats_iv), IVLEN)) 372 goto err; 373 374 if (!TEST_true(test_secret(s, out_master_secret, 375 (unsigned char *)client_ats_label, 376 strlen(client_ats_label), client_ats, 377 client_ats_key, client_ats_iv))) { 378 TEST_info("Client application data secret test failed"); 379 goto err; 380 } 381 382 if (!TEST_size_t_eq(sizeof(server_ats), hashsize)) 383 goto err; 384 if (!TEST_size_t_eq(sizeof(server_ats_key), KEYLEN)) 385 goto err; 386 if (!TEST_size_t_eq(sizeof(server_ats_iv), IVLEN)) 387 goto err; 388 389 if (!TEST_true(test_secret(s, out_master_secret, 390 (unsigned char *)server_ats_label, 391 strlen(server_ats_label), server_ats, 392 server_ats_key, server_ats_iv))) { 393 TEST_info("Server application data secret test failed"); 394 goto err; 395 } 396 397 ret = 1; 398 err: 399 SSL_free(s); 400 SSL_CTX_free(ctx); 401 return ret; 402} 403 404int setup_tests(void) 405{ 406 ADD_TEST(test_handshake_secrets); 407 return 1; 408} 409