| /* |
| * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <openssl/ssl.h> |
| #include <openssl/evp.h> |
| #include "../ssl/ssl_locl.h" |
| |
| #include "testutil.h" |
| #include "test_main.h" |
| |
| #define IVLEN 12 |
| #define KEYLEN 16 |
| |
| /* The following are self-generated test vectors. This gives us very little |
| * confidence that we've got the implementation right, but at least tells us |
| * if we accidentally break something in the future. Until we can get some |
| * other source of test vectors this is all we've got. |
| * TODO(TLS1.3): As and when official vectors become available we should use |
| * those, e.g. see |
| * https://www.ietf.org/id/draft-thomson-tls-tls13-vectors-00.txt, however at |
| * the time of writing these are not suitable because they are based on |
| * draft -16, which works differently to the draft -19 vectors below. |
| */ |
| |
| static unsigned char hs_start_hash[] = { |
| 0xec, 0x14, 0x7a, 0x06, 0xde, 0xa3, 0xc8, 0x84, 0x6c, 0x02, 0xb2, 0x23, 0x8e, |
| 0x41, 0xbd, 0xdc, 0x9d, 0x89, 0xf9, 0xae, 0xa1, 0x7b, 0x5e, 0xfd, 0x4d, 0x74, |
| 0x82, 0xaf, 0x75, 0x88, 0x1c, 0x0a |
| }; |
| |
| static unsigned char hs_full_hash[] = { |
| 0x75, 0x1a, 0x3d, 0x4a, 0x14, 0xdf, 0xab, 0xeb, 0x68, 0xe9, 0x2c, 0xa5, 0x91, |
| 0x8e, 0x24, 0x08, 0xb9, 0xbc, 0xb0, 0x74, 0x89, 0x82, 0xec, 0x9c, 0x32, 0x30, |
| 0xac, 0x30, 0xbb, 0xeb, 0x23, 0xe2, |
| }; |
| |
| static unsigned char early_secret[] = { |
| 0x33, 0xad, 0x0a, 0x1c, 0x60, 0x7e, 0xc0, 0x3b, 0x09, 0xe6, 0xcd, 0x98, 0x93, |
| 0x68, 0x0c, 0xe2, 0x10, 0xad, 0xf3, 0x00, 0xaa, 0x1f, 0x26, 0x60, 0xe1, 0xb2, |
| 0x2e, 0x10, 0xf1, 0x70, 0xf9, 0x2a |
| }; |
| |
| static unsigned char ecdhe_secret[] = { |
| 0xe7, 0xb8, 0xfe, 0xf8, 0x90, 0x3b, 0x52, 0x0c, 0xb9, 0xa1, 0x89, 0x71, 0xb6, |
| 0x9d, 0xd4, 0x5d, 0xca, 0x53, 0xce, 0x2f, 0x12, 0xbf, 0x3b, 0xef, 0x93, 0x15, |
| 0xe3, 0x12, 0x71, 0xdf, 0x4b, 0x40 |
| }; |
| |
| static unsigned char handshake_secret[] = { |
| 0xa4, 0xc6, 0x2e, 0x1c, 0x3c, 0xb8, 0x0a, 0xae, 0x34, 0x34, 0x0d, 0xb8, 0xfb, |
| 0x0d, 0xd5, 0x0d, 0x2d, 0x2f, 0x08, 0xa4, 0x54, 0x6b, 0xbb, 0x2e, 0x60, 0xc6, |
| 0x53, 0xac, 0xb3, 0xca, 0xf2, 0x87 |
| }; |
| |
| static const char *client_hts_label = "client handshake traffic secret"; |
| |
| static unsigned char client_hts[] = { |
| 0xd7, 0x58, 0x9f, 0x10, 0xa8, 0x30, 0xf3, 0x85, 0x63, 0x6f, 0xd9, 0xb0, 0x61, |
| 0xd5, 0x20, 0x19, 0xb1, 0x45, 0x96, 0x82, 0x24, 0x8e, 0x36, 0x45, 0xf7, 0x5a, |
| 0xd7, 0x2f, 0x31, 0xec, 0x57, 0xf7 |
| }; |
| |
| static unsigned char client_hts_key[] = { |
| 0xcc, 0x8b, 0xda, 0xbf, 0x83, 0x74, 0x2d, 0xf4, 0x53, 0x44, 0xff, 0xbc, 0xa4, |
| 0x43, 0xc8, 0x2a |
| }; |
| |
| static unsigned char client_hts_iv[] = { |
| 0xa4, 0x83, 0x46, 0x11, 0xc2, 0x78, 0xea, 0x0f, 0x94, 0x52, 0x1d, 0xca |
| }; |
| |
| static const char *server_hts_label = "server handshake traffic secret"; |
| |
| static unsigned char server_hts[] = { |
| 0xba, 0x7c, 0x3b, 0x74, 0x0d, 0x1e, 0x84, 0x82, 0xd6, 0x6f, 0x3e, 0x5e, 0x1d, |
| 0x6e, 0x25, 0xdc, 0x87, 0x1f, 0x48, 0x74, 0x2f, 0x65, 0xa4, 0x40, 0x39, 0xda, |
| 0xdc, 0x02, 0x2a, 0x16, 0x19, 0x5c |
| }; |
| |
| static unsigned char server_hts_key[] = { |
| 0x7d, 0x22, 0x2a, 0x3f, 0x72, 0x37, 0x92, 0xd9, 0x95, 0x9a, 0xe1, 0x66, 0x32, |
| 0x6f, 0x0d, 0xc9 |
| }; |
| |
| static unsigned char server_hts_iv[] = { |
| 0xa2, 0x73, 0xcd, 0x4e, 0x20, 0xe7, 0xe1, 0xe3, 0xcb, 0x0e, 0x18, 0x9e |
| }; |
| |
| static unsigned char master_secret[] = { |
| 0x9a, 0x2f, 0x36, 0xdc, 0x68, 0xab, 0x8f, 0x07, 0xef, 0x41, 0xea, 0x63, 0x39, |
| 0xfc, 0x46, 0x6b, 0x11, 0x24, 0xd6, 0xba, 0x6b, 0x8a, 0x92, 0x74, 0x61, 0xd3, |
| 0x64, 0x82, 0xc1, 0xc9, 0xc7, 0x0e |
| }; |
| |
| static const char *client_ats_label = "client application traffic secret"; |
| |
| static unsigned char client_ats[] = { |
| 0xc3, 0x60, 0x5f, 0xb3, 0xc4, 0x4b, 0xc2, 0x25, 0xd2, 0xaf, 0x36, 0xad, 0x99, |
| 0xa1, 0xcd, 0xcf, 0x71, 0xc4, 0xb9, 0xa2, 0x3d, 0xd2, 0x3e, 0xe6, 0xff, 0xca, |
| 0x2c, 0x71, 0x86, 0x3d, 0x1f, 0x85 |
| }; |
| |
| static unsigned char client_ats_key[] = { |
| 0x3a, 0x25, 0x23, 0x12, 0xde, 0x0f, 0x53, 0xc7, 0xa0, 0xb2, 0xcf, 0x71, 0xb7, |
| 0x1a, 0x0d, 0xc7 |
| }; |
| |
| static unsigned char client_ats_iv[] = { |
| 0xbd, 0x0d, 0x3c, 0x26, 0x9d, 0x2d, 0xa6, 0x52, 0x1b, 0x8d, 0x45, 0xef |
| }; |
| |
| static const char *server_ats_label = "server application traffic secret"; |
| |
| static unsigned char server_ats[] = { |
| 0x27, 0x8d, 0x96, 0x76, 0x95, 0x9e, 0x3e, 0x39, 0xa4, 0xa9, 0xfc, 0x46, 0x9c, |
| 0x32, 0x9f, 0xe0, 0x29, 0x50, 0x22, 0x45, 0x39, 0x82, 0xdd, 0x1c, 0xc5, 0xfb, |
| 0xa9, 0x0a, 0x68, 0x29, 0x4e, 0x80 |
| }; |
| |
| static unsigned char server_ats_key[] = { |
| 0x78, 0xbd, 0xd7, 0xc6, 0xb0, 0xf1, 0x50, 0x5e, 0xae, 0x54, 0xff, 0xa5, 0xf2, |
| 0xed, 0x0b, 0x77 |
| }; |
| |
| static unsigned char server_ats_iv[] = { |
| 0xb1, 0x7b, 0x1c, 0xa2, 0xca, 0xbe, 0xe4, 0xac, 0xb5, 0xf3, 0x91, 0x7e |
| }; |
| |
| /* Mocked out implementations of various functions */ |
| int ssl3_digest_cached_records(SSL *s, int keep) |
| { |
| return 1; |
| } |
| |
| static int full_hash = 0; |
| |
| /* Give a hash of the currently set handshake */ |
| int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen, |
| size_t *hashlen) |
| { |
| if (sizeof(hs_start_hash) > outlen |
| || sizeof(hs_full_hash) != sizeof(hs_start_hash)) |
| return 0; |
| |
| if (full_hash) { |
| memcpy(out, hs_full_hash, sizeof(hs_full_hash)); |
| *hashlen = sizeof(hs_full_hash); |
| } else { |
| memcpy(out, hs_start_hash, sizeof(hs_start_hash)); |
| *hashlen = sizeof(hs_start_hash); |
| } |
| |
| return 1; |
| } |
| |
| const EVP_MD *ssl_handshake_md(SSL *s) |
| { |
| return EVP_sha256(); |
| } |
| |
| void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
| { |
| } |
| |
| void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) |
| { |
| } |
| |
| int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, |
| const EVP_MD **md, int *mac_pkey_type, |
| size_t *mac_secret_size, SSL_COMP **comp, int use_etm) |
| |
| { |
| return 0; |
| } |
| |
| int tls1_alert_code(int code) |
| { |
| return code; |
| } |
| |
| int ssl_log_secret(SSL *ssl, |
| const char *label, |
| const uint8_t *secret, |
| size_t secret_len) |
| { |
| return 1; |
| } |
| |
| const EVP_MD *ssl_md(int idx) |
| { |
| return EVP_sha256(); |
| } |
| |
| /* End of mocked out code */ |
| |
| static int test_secret(SSL *s, unsigned char *prk, |
| const unsigned char *label, size_t labellen, |
| const unsigned char *ref_secret, |
| const unsigned char *ref_key, const unsigned char *ref_iv) |
| { |
| size_t hashsize; |
| unsigned char gensecret[EVP_MAX_MD_SIZE]; |
| unsigned char hash[EVP_MAX_MD_SIZE]; |
| unsigned char key[KEYLEN]; |
| unsigned char iv[IVLEN]; |
| const EVP_MD *md = ssl_handshake_md(s); |
| |
| if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashsize)) { |
| fprintf(stderr, "Failed to get hash\n"); |
| return 0; |
| } |
| |
| if (!tls13_hkdf_expand(s, md, prk, label, labellen, hash, gensecret, |
| hashsize)) { |
| fprintf(stderr, "Secret generation failed\n"); |
| return 0; |
| } |
| |
| if (memcmp(gensecret, ref_secret, hashsize) != 0) { |
| fprintf(stderr, "Generated secret does not match\n"); |
| return 0; |
| } |
| |
| if (!tls13_derive_key(s, md, gensecret, key, KEYLEN)) { |
| fprintf(stderr, "Key generation failed\n"); |
| return 0; |
| } |
| |
| if (memcmp(key, ref_key, KEYLEN) != 0) { |
| fprintf(stderr, "Generated key does not match\n"); |
| return 0; |
| } |
| |
| if (!tls13_derive_iv(s, md, gensecret, iv, IVLEN)) { |
| fprintf(stderr, "IV generation failed\n"); |
| return 0; |
| } |
| |
| if (memcmp(iv, ref_iv, IVLEN) != 0) { |
| fprintf(stderr, "Generated IV does not match\n"); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static int test_handshake_secrets(void) |
| { |
| SSL_CTX *ctx = NULL; |
| SSL *s = NULL; |
| int ret = 0; |
| size_t hashsize; |
| unsigned char out_master_secret[EVP_MAX_MD_SIZE]; |
| size_t master_secret_length; |
| |
| ctx = SSL_CTX_new(TLS_method()); |
| if (ctx == NULL) |
| goto err; |
| |
| s = SSL_new(ctx); |
| if (s == NULL) |
| goto err; |
| |
| s->session = SSL_SESSION_new(); |
| if (s->session == NULL) |
| goto err; |
| |
| if (!tls13_generate_secret(s, ssl_handshake_md(s), NULL, NULL, 0, |
| (unsigned char *)&s->early_secret)) { |
| fprintf(stderr, "Early secret generation failed\n"); |
| goto err; |
| } |
| |
| if (memcmp(s->early_secret, early_secret, sizeof(early_secret)) != 0) { |
| fprintf(stderr, "Early secret does not match\n"); |
| goto err; |
| } |
| |
| if (!tls13_generate_handshake_secret(s, ecdhe_secret, |
| sizeof(ecdhe_secret))) { |
| fprintf(stderr, "Hanshake secret generation failed\n"); |
| goto err; |
| } |
| |
| if (memcmp(s->handshake_secret, handshake_secret, |
| sizeof(handshake_secret)) != 0) { |
| fprintf(stderr, "Handshake secret does not match\n"); |
| goto err; |
| } |
| |
| hashsize = EVP_MD_size(ssl_handshake_md(s)); |
| if (sizeof(client_hts) != hashsize || sizeof(client_hts_key) != KEYLEN |
| || sizeof(client_hts_iv) != IVLEN) { |
| fprintf(stderr, "Internal test error\n"); |
| goto err; |
| } |
| |
| if (!test_secret(s, s->handshake_secret, (unsigned char *)client_hts_label, |
| strlen(client_hts_label), client_hts, client_hts_key, |
| client_hts_iv)) { |
| fprintf(stderr, "Client handshake secret test failed\n"); |
| goto err; |
| } |
| |
| if (sizeof(server_hts) != hashsize || sizeof(server_hts_key) != KEYLEN |
| || sizeof(server_hts_iv) != IVLEN) { |
| fprintf(stderr, "Internal test error\n"); |
| goto err; |
| } |
| |
| if (!test_secret(s, s->handshake_secret, (unsigned char *)server_hts_label, |
| strlen(server_hts_label), server_hts, server_hts_key, |
| server_hts_iv)) { |
| fprintf(stderr, "Server handshake secret test failed\n"); |
| goto err; |
| } |
| |
| /* |
| * Ensure the mocked out ssl_handshake_hash() returns the full handshake |
| * hash. |
| */ |
| full_hash = 1; |
| |
| if (!tls13_generate_master_secret(s, out_master_secret, |
| s->handshake_secret, hashsize, |
| &master_secret_length)) { |
| fprintf(stderr, "Master secret generation failed\n"); |
| goto err; |
| } |
| |
| if (master_secret_length != sizeof(master_secret) || |
| memcmp(out_master_secret, master_secret, |
| sizeof(master_secret)) != 0) { |
| fprintf(stderr, "Master secret does not match\n"); |
| goto err; |
| } |
| |
| if (sizeof(client_ats) != hashsize || sizeof(client_ats_key) != KEYLEN |
| || sizeof(client_ats_iv) != IVLEN) { |
| fprintf(stderr, "Internal test error\n"); |
| goto err; |
| } |
| |
| if (!test_secret(s, out_master_secret, (unsigned char *)client_ats_label, |
| strlen(client_ats_label), client_ats, client_ats_key, |
| client_ats_iv)) { |
| fprintf(stderr, "Client application data secret test failed\n"); |
| goto err; |
| } |
| |
| if (sizeof(server_ats) != hashsize || sizeof(server_ats_key) != KEYLEN |
| || sizeof(server_ats_iv) != IVLEN) { |
| fprintf(stderr, "Internal test error\n"); |
| goto err; |
| } |
| |
| if (!test_secret(s, out_master_secret, (unsigned char *)server_ats_label, |
| strlen(server_ats_label), server_ats, server_ats_key, |
| server_ats_iv)) { |
| fprintf(stderr, "Server application data secret test failed\n"); |
| goto err; |
| } |
| |
| ret = 1; |
| err: |
| SSL_free(s); |
| SSL_CTX_free(ctx); |
| return ret; |
| } |
| |
| void register_tests() |
| { |
| ADD_TEST(test_handshake_secrets); |
| } |