tls13secretstest.c 11 KB

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  1. /*
  2. * Copyright 2016-2018 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. #include <openssl/ssl.h>
  10. #include <openssl/evp.h>
  11. #include "../ssl/ssl_locl.h"
  12. #include "testutil.h"
  13. #define IVLEN 12
  14. #define KEYLEN 16
  15. /*
  16. * Based on the test vectors available in:
  17. * https://tools.ietf.org/html/draft-ietf-tls-tls13-vectors-06
  18. */
  19. static unsigned char hs_start_hash[] = {
  20. 0xc6, 0xc9, 0x18, 0xad, 0x2f, 0x41, 0x99, 0xd5, 0x59, 0x8e, 0xaf, 0x01, 0x16,
  21. 0xcb, 0x7a, 0x5c, 0x2c, 0x14, 0xcb, 0x54, 0x78, 0x12, 0x18, 0x88, 0x8d, 0xb7,
  22. 0x03, 0x0d, 0xd5, 0x0d, 0x5e, 0x6d
  23. };
  24. static unsigned char hs_full_hash[] = {
  25. 0xf8, 0xc1, 0x9e, 0x8c, 0x77, 0xc0, 0x38, 0x79, 0xbb, 0xc8, 0xeb, 0x6d, 0x56,
  26. 0xe0, 0x0d, 0xd5, 0xd8, 0x6e, 0xf5, 0x59, 0x27, 0xee, 0xfc, 0x08, 0xe1, 0xb0,
  27. 0x02, 0xb6, 0xec, 0xe0, 0x5d, 0xbf
  28. };
  29. static unsigned char early_secret[] = {
  30. 0x33, 0xad, 0x0a, 0x1c, 0x60, 0x7e, 0xc0, 0x3b, 0x09, 0xe6, 0xcd, 0x98, 0x93,
  31. 0x68, 0x0c, 0xe2, 0x10, 0xad, 0xf3, 0x00, 0xaa, 0x1f, 0x26, 0x60, 0xe1, 0xb2,
  32. 0x2e, 0x10, 0xf1, 0x70, 0xf9, 0x2a
  33. };
  34. static unsigned char ecdhe_secret[] = {
  35. 0x81, 0x51, 0xd1, 0x46, 0x4c, 0x1b, 0x55, 0x53, 0x36, 0x23, 0xb9, 0xc2, 0x24,
  36. 0x6a, 0x6a, 0x0e, 0x6e, 0x7e, 0x18, 0x50, 0x63, 0xe1, 0x4a, 0xfd, 0xaf, 0xf0,
  37. 0xb6, 0xe1, 0xc6, 0x1a, 0x86, 0x42
  38. };
  39. static unsigned char handshake_secret[] = {
  40. 0x5b, 0x4f, 0x96, 0x5d, 0xf0, 0x3c, 0x68, 0x2c, 0x46, 0xe6, 0xee, 0x86, 0xc3,
  41. 0x11, 0x63, 0x66, 0x15, 0xa1, 0xd2, 0xbb, 0xb2, 0x43, 0x45, 0xc2, 0x52, 0x05,
  42. 0x95, 0x3c, 0x87, 0x9e, 0x8d, 0x06
  43. };
  44. static const char *client_hts_label = "c hs traffic";
  45. static unsigned char client_hts[] = {
  46. 0xe2, 0xe2, 0x32, 0x07, 0xbd, 0x93, 0xfb, 0x7f, 0xe4, 0xfc, 0x2e, 0x29, 0x7a,
  47. 0xfe, 0xab, 0x16, 0x0e, 0x52, 0x2b, 0x5a, 0xb7, 0x5d, 0x64, 0xa8, 0x6e, 0x75,
  48. 0xbc, 0xac, 0x3f, 0x3e, 0x51, 0x03
  49. };
  50. static unsigned char client_hts_key[] = {
  51. 0x26, 0x79, 0xa4, 0x3e, 0x1d, 0x76, 0x78, 0x40, 0x34, 0xea, 0x17, 0x97, 0xd5,
  52. 0xad, 0x26, 0x49
  53. };
  54. static unsigned char client_hts_iv[] = {
  55. 0x54, 0x82, 0x40, 0x52, 0x90, 0xdd, 0x0d, 0x2f, 0x81, 0xc0, 0xd9, 0x42
  56. };
  57. static const char *server_hts_label = "s hs traffic";
  58. static unsigned char server_hts[] = {
  59. 0x3b, 0x7a, 0x83, 0x9c, 0x23, 0x9e, 0xf2, 0xbf, 0x0b, 0x73, 0x05, 0xa0, 0xe0,
  60. 0xc4, 0xe5, 0xa8, 0xc6, 0xc6, 0x93, 0x30, 0xa7, 0x53, 0xb3, 0x08, 0xf5, 0xe3,
  61. 0xa8, 0x3a, 0xa2, 0xef, 0x69, 0x79
  62. };
  63. static unsigned char server_hts_key[] = {
  64. 0xc6, 0x6c, 0xb1, 0xae, 0xc5, 0x19, 0xdf, 0x44, 0xc9, 0x1e, 0x10, 0x99, 0x55,
  65. 0x11, 0xac, 0x8b
  66. };
  67. static unsigned char server_hts_iv[] = {
  68. 0xf7, 0xf6, 0x88, 0x4c, 0x49, 0x81, 0x71, 0x6c, 0x2d, 0x0d, 0x29, 0xa4
  69. };
  70. static unsigned char master_secret[] = {
  71. 0x5c, 0x79, 0xd1, 0x69, 0x42, 0x4e, 0x26, 0x2b, 0x56, 0x32, 0x03, 0x62, 0x7b,
  72. 0xe4, 0xeb, 0x51, 0x03, 0x3f, 0x58, 0x8c, 0x43, 0xc9, 0xce, 0x03, 0x73, 0x37,
  73. 0x2d, 0xbc, 0xbc, 0x01, 0x85, 0xa7
  74. };
  75. static const char *client_ats_label = "c ap traffic";
  76. static unsigned char client_ats[] = {
  77. 0xe2, 0xf0, 0xdb, 0x6a, 0x82, 0xe8, 0x82, 0x80, 0xfc, 0x26, 0xf7, 0x3c, 0x89,
  78. 0x85, 0x4e, 0xe8, 0x61, 0x5e, 0x25, 0xdf, 0x28, 0xb2, 0x20, 0x79, 0x62, 0xfa,
  79. 0x78, 0x22, 0x26, 0xb2, 0x36, 0x26
  80. };
  81. static unsigned char client_ats_key[] = {
  82. 0x88, 0xb9, 0x6a, 0xd6, 0x86, 0xc8, 0x4b, 0xe5, 0x5a, 0xce, 0x18, 0xa5, 0x9c,
  83. 0xce, 0x5c, 0x87
  84. };
  85. static unsigned char client_ats_iv[] = {
  86. 0xb9, 0x9d, 0xc5, 0x8c, 0xd5, 0xff, 0x5a, 0xb0, 0x82, 0xfd, 0xad, 0x19
  87. };
  88. static const char *server_ats_label = "s ap traffic";
  89. static unsigned char server_ats[] = {
  90. 0x5b, 0x73, 0xb1, 0x08, 0xd9, 0xac, 0x1b, 0x9b, 0x0c, 0x82, 0x48, 0xca, 0x39,
  91. 0x26, 0xec, 0x6e, 0x7b, 0xc4, 0x7e, 0x41, 0x17, 0x06, 0x96, 0x39, 0x87, 0xec,
  92. 0x11, 0x43, 0x5d, 0x30, 0x57, 0x19
  93. };
  94. static unsigned char server_ats_key[] = {
  95. 0xa6, 0x88, 0xeb, 0xb5, 0xac, 0x82, 0x6d, 0x6f, 0x42, 0xd4, 0x5c, 0x0c, 0xc4,
  96. 0x4b, 0x9b, 0x7d
  97. };
  98. static unsigned char server_ats_iv[] = {
  99. 0xc1, 0xca, 0xd4, 0x42, 0x5a, 0x43, 0x8b, 0x5d, 0xe7, 0x14, 0x83, 0x0a
  100. };
  101. /* Mocked out implementations of various functions */
  102. int ssl3_digest_cached_records(SSL *s, int keep)
  103. {
  104. return 1;
  105. }
  106. static int full_hash = 0;
  107. /* Give a hash of the currently set handshake */
  108. int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
  109. size_t *hashlen)
  110. {
  111. if (sizeof(hs_start_hash) > outlen
  112. || sizeof(hs_full_hash) != sizeof(hs_start_hash))
  113. return 0;
  114. if (full_hash) {
  115. memcpy(out, hs_full_hash, sizeof(hs_full_hash));
  116. *hashlen = sizeof(hs_full_hash);
  117. } else {
  118. memcpy(out, hs_start_hash, sizeof(hs_start_hash));
  119. *hashlen = sizeof(hs_start_hash);
  120. }
  121. return 1;
  122. }
  123. const EVP_MD *ssl_handshake_md(SSL *s)
  124. {
  125. return EVP_sha256();
  126. }
  127. void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl)
  128. {
  129. }
  130. void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl)
  131. {
  132. }
  133. int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
  134. const EVP_MD **md, int *mac_pkey_type,
  135. size_t *mac_secret_size, SSL_COMP **comp, int use_etm)
  136. {
  137. return 0;
  138. }
  139. int tls1_alert_code(int code)
  140. {
  141. return code;
  142. }
  143. int ssl_log_secret(SSL *ssl,
  144. const char *label,
  145. const uint8_t *secret,
  146. size_t secret_len)
  147. {
  148. return 1;
  149. }
  150. const EVP_MD *ssl_md(int idx)
  151. {
  152. return EVP_sha256();
  153. }
  154. void ossl_statem_fatal(SSL *s, int al, int func, int reason, const char *file,
  155. int line)
  156. {
  157. }
  158. int ossl_statem_export_allowed(SSL *s)
  159. {
  160. return 1;
  161. }
  162. int ossl_statem_export_early_allowed(SSL *s)
  163. {
  164. return 1;
  165. }
  166. /* End of mocked out code */
  167. static int test_secret(SSL *s, unsigned char *prk,
  168. const unsigned char *label, size_t labellen,
  169. const unsigned char *ref_secret,
  170. const unsigned char *ref_key, const unsigned char *ref_iv)
  171. {
  172. size_t hashsize;
  173. unsigned char gensecret[EVP_MAX_MD_SIZE];
  174. unsigned char hash[EVP_MAX_MD_SIZE];
  175. unsigned char key[KEYLEN];
  176. unsigned char iv[IVLEN];
  177. const EVP_MD *md = ssl_handshake_md(s);
  178. if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashsize)) {
  179. TEST_error("Failed to get hash");
  180. return 0;
  181. }
  182. if (!tls13_hkdf_expand(s, md, prk, label, labellen, hash, hashsize,
  183. gensecret, hashsize, 1)) {
  184. TEST_error("Secret generation failed");
  185. return 0;
  186. }
  187. if (!TEST_mem_eq(gensecret, hashsize, ref_secret, hashsize))
  188. return 0;
  189. if (!tls13_derive_key(s, md, gensecret, key, KEYLEN)) {
  190. TEST_error("Key generation failed");
  191. return 0;
  192. }
  193. if (!TEST_mem_eq(key, KEYLEN, ref_key, KEYLEN))
  194. return 0;
  195. if (!tls13_derive_iv(s, md, gensecret, iv, IVLEN)) {
  196. TEST_error("IV generation failed");
  197. return 0;
  198. }
  199. if (!TEST_mem_eq(iv, IVLEN, ref_iv, IVLEN))
  200. return 0;
  201. return 1;
  202. }
  203. static int test_handshake_secrets(void)
  204. {
  205. SSL_CTX *ctx = NULL;
  206. SSL *s = NULL;
  207. int ret = 0;
  208. size_t hashsize;
  209. unsigned char out_master_secret[EVP_MAX_MD_SIZE];
  210. size_t master_secret_length;
  211. ctx = SSL_CTX_new(TLS_method());
  212. if (!TEST_ptr(ctx))
  213. goto err;
  214. s = SSL_new(ctx);
  215. if (!TEST_ptr(s ))
  216. goto err;
  217. s->session = SSL_SESSION_new();
  218. if (!TEST_ptr(s->session))
  219. goto err;
  220. if (!TEST_true(tls13_generate_secret(s, ssl_handshake_md(s), NULL, NULL, 0,
  221. (unsigned char *)&s->early_secret))) {
  222. TEST_info("Early secret generation failed");
  223. goto err;
  224. }
  225. if (!TEST_mem_eq(s->early_secret, sizeof(early_secret),
  226. early_secret, sizeof(early_secret))) {
  227. TEST_info("Early secret does not match");
  228. goto err;
  229. }
  230. if (!TEST_true(tls13_generate_handshake_secret(s, ecdhe_secret,
  231. sizeof(ecdhe_secret)))) {
  232. TEST_info("Handshake secret generation failed");
  233. goto err;
  234. }
  235. if (!TEST_mem_eq(s->handshake_secret, sizeof(handshake_secret),
  236. handshake_secret, sizeof(handshake_secret)))
  237. goto err;
  238. hashsize = EVP_MD_size(ssl_handshake_md(s));
  239. if (!TEST_size_t_eq(sizeof(client_hts), hashsize))
  240. goto err;
  241. if (!TEST_size_t_eq(sizeof(client_hts_key), KEYLEN))
  242. goto err;
  243. if (!TEST_size_t_eq(sizeof(client_hts_iv), IVLEN))
  244. goto err;
  245. if (!TEST_true(test_secret(s, s->handshake_secret,
  246. (unsigned char *)client_hts_label,
  247. strlen(client_hts_label), client_hts,
  248. client_hts_key, client_hts_iv))) {
  249. TEST_info("Client handshake secret test failed");
  250. goto err;
  251. }
  252. if (!TEST_size_t_eq(sizeof(server_hts), hashsize))
  253. goto err;
  254. if (!TEST_size_t_eq(sizeof(server_hts_key), KEYLEN))
  255. goto err;
  256. if (!TEST_size_t_eq(sizeof(server_hts_iv), IVLEN))
  257. goto err;
  258. if (!TEST_true(test_secret(s, s->handshake_secret,
  259. (unsigned char *)server_hts_label,
  260. strlen(server_hts_label), server_hts,
  261. server_hts_key, server_hts_iv))) {
  262. TEST_info("Server handshake secret test failed");
  263. goto err;
  264. }
  265. /*
  266. * Ensure the mocked out ssl_handshake_hash() returns the full handshake
  267. * hash.
  268. */
  269. full_hash = 1;
  270. if (!TEST_true(tls13_generate_master_secret(s, out_master_secret,
  271. s->handshake_secret, hashsize,
  272. &master_secret_length))) {
  273. TEST_info("Master secret generation failed");
  274. goto err;
  275. }
  276. if (!TEST_mem_eq(out_master_secret, master_secret_length,
  277. master_secret, sizeof(master_secret))) {
  278. TEST_info("Master secret does not match");
  279. goto err;
  280. }
  281. if (!TEST_size_t_eq(sizeof(client_ats), hashsize))
  282. goto err;
  283. if (!TEST_size_t_eq(sizeof(client_ats_key), KEYLEN))
  284. goto err;
  285. if (!TEST_size_t_eq(sizeof(client_ats_iv), IVLEN))
  286. goto err;
  287. if (!TEST_true(test_secret(s, out_master_secret,
  288. (unsigned char *)client_ats_label,
  289. strlen(client_ats_label), client_ats,
  290. client_ats_key, client_ats_iv))) {
  291. TEST_info("Client application data secret test failed");
  292. goto err;
  293. }
  294. if (!TEST_size_t_eq(sizeof(server_ats), hashsize))
  295. goto err;
  296. if (!TEST_size_t_eq(sizeof(server_ats_key), KEYLEN))
  297. goto err;
  298. if (!TEST_size_t_eq(sizeof(server_ats_iv), IVLEN))
  299. goto err;
  300. if (!TEST_true(test_secret(s, out_master_secret,
  301. (unsigned char *)server_ats_label,
  302. strlen(server_ats_label), server_ats,
  303. server_ats_key, server_ats_iv))) {
  304. TEST_info("Server application data secret test failed");
  305. goto err;
  306. }
  307. ret = 1;
  308. err:
  309. SSL_free(s);
  310. SSL_CTX_free(ctx);
  311. return ret;
  312. }
  313. int setup_tests(void)
  314. {
  315. ADD_TEST(test_handshake_secrets);
  316. return 1;
  317. }