1 /* $OpenBSD: tls_prf.c,v 1.11 2024/07/16 14:38:59 jsing Exp $ */ 2 /* 3 * Copyright (c) 2017 Joel Sing <jsing@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <err.h> 19 20 #include "ssl_local.h" 21 22 int tls1_PRF(SSL *s, const unsigned char *secret, size_t secret_len, 23 const void *seed1, size_t seed1_len, const void *seed2, size_t seed2_len, 24 const void *seed3, size_t seed3_len, const void *seed4, size_t seed4_len, 25 const void *seed5, size_t seed5_len, unsigned char *out, size_t out_len); 26 27 #define TLS_PRF_OUT_LEN 128 28 29 struct tls_prf_test { 30 const unsigned char *desc; 31 const SSL_METHOD *(*ssl_method)(void); 32 const uint16_t cipher_value; 33 const unsigned char out[TLS_PRF_OUT_LEN]; 34 }; 35 36 static const struct tls_prf_test tls_prf_tests[] = { 37 { 38 .desc = "SHA256", 39 .ssl_method = TLSv1_2_method, 40 .cipher_value = 0x0033, 41 .out = { 42 0x37, 0xa7, 0x06, 0x71, 0x6e, 0x19, 0x19, 0xda, 43 0x23, 0x8c, 0xcc, 0xb4, 0x2f, 0x31, 0x64, 0x9d, 44 0x05, 0x29, 0x1c, 0x33, 0x7e, 0x09, 0x1b, 0x0c, 45 0x0e, 0x23, 0xc1, 0xb0, 0x40, 0xcc, 0x31, 0xf7, 46 0x55, 0x66, 0x68, 0xd9, 0xa8, 0xae, 0x74, 0x75, 47 0xf3, 0x46, 0xe9, 0x3a, 0x54, 0x9d, 0xe0, 0x8b, 48 0x7e, 0x6c, 0x63, 0x1c, 0xfa, 0x2f, 0xfd, 0xc9, 49 0xd3, 0xf1, 0xd3, 0xfe, 0x7b, 0x9e, 0x14, 0x95, 50 0xb5, 0xd0, 0xad, 0x9b, 0xee, 0x78, 0x8c, 0x83, 51 0x18, 0x58, 0x7e, 0xa2, 0x23, 0xc1, 0x8b, 0x62, 52 0x94, 0x12, 0xcb, 0xb6, 0x60, 0x69, 0x32, 0xfe, 53 0x98, 0x0e, 0x93, 0xb0, 0x8e, 0x5c, 0xfb, 0x6e, 54 0xdb, 0x9a, 0xc2, 0x9f, 0x8c, 0x5c, 0x43, 0x19, 55 0xeb, 0x4a, 0x52, 0xad, 0x62, 0x2b, 0xdd, 0x9f, 56 0xa3, 0x74, 0xa6, 0x96, 0x61, 0x4d, 0x98, 0x40, 57 0x63, 0xa6, 0xd4, 0xbb, 0x17, 0x11, 0x75, 0xed, 58 }, 59 }, 60 { 61 .desc = "SHA384", 62 .ssl_method = TLSv1_2_method, 63 .cipher_value = 0x009d, 64 .out = { 65 0x00, 0x93, 0xc3, 0xfd, 0xa7, 0xbb, 0xdc, 0x5b, 66 0x13, 0x3a, 0xe6, 0x8b, 0x1b, 0xac, 0xf3, 0xfb, 67 0x3c, 0x9a, 0x78, 0xf6, 0x19, 0xf0, 0x13, 0x0f, 68 0x0d, 0x01, 0x9d, 0xdf, 0x0a, 0x28, 0x38, 0xce, 69 0x1a, 0x9b, 0x43, 0xbe, 0x56, 0x12, 0xa7, 0x16, 70 0x58, 0xe1, 0x8a, 0xe4, 0xc5, 0xbb, 0x10, 0x4c, 71 0x3a, 0xf3, 0x7f, 0xd3, 0xdb, 0xe4, 0xe0, 0x3d, 72 0xcc, 0x83, 0xca, 0xf0, 0xf9, 0x69, 0xcc, 0x70, 73 0x83, 0x32, 0xf6, 0xfc, 0x81, 0x80, 0x02, 0xe8, 74 0x31, 0x1e, 0x7c, 0x3b, 0x34, 0xf7, 0x34, 0xd1, 75 0xcf, 0x2a, 0xc4, 0x36, 0x2f, 0xe9, 0xaa, 0x7f, 76 0x6d, 0x1f, 0x5e, 0x0e, 0x39, 0x05, 0x15, 0xe1, 77 0xa2, 0x9a, 0x4d, 0x97, 0x8c, 0x62, 0x46, 0xf1, 78 0x87, 0x65, 0xd8, 0xe9, 0x14, 0x11, 0xa6, 0x48, 79 0xd7, 0x0e, 0x6e, 0x70, 0xad, 0xfb, 0x3f, 0x36, 80 0x05, 0x76, 0x4b, 0xe4, 0x28, 0x50, 0x4a, 0xf2, 81 }, 82 }, 83 }; 84 85 #define N_TLS_PRF_TESTS \ 86 (sizeof(tls_prf_tests) / sizeof(*tls_prf_tests)) 87 88 #define TLS_PRF_SEED1 "tls prf seed 1" 89 #define TLS_PRF_SEED2 "tls prf seed 2" 90 #define TLS_PRF_SEED3 "tls prf seed 3" 91 #define TLS_PRF_SEED4 "tls prf seed 4" 92 #define TLS_PRF_SEED5 "tls prf seed 5" 93 #define TLS_PRF_SECRET "tls prf secretz" 94 95 static void 96 hexdump(const unsigned char *buf, size_t len) 97 { 98 size_t i; 99 100 for (i = 1; i <= len; i++) 101 fprintf(stderr, " 0x%02hhx,%s", buf[i - 1], i % 8 ? "" : "\n"); 102 103 fprintf(stderr, "\n"); 104 } 105 106 static int 107 do_tls_prf_test(int test_no, const struct tls_prf_test *tpt) 108 { 109 unsigned char *out = NULL; 110 const SSL_CIPHER *cipher; 111 SSL_CTX *ssl_ctx = NULL; 112 SSL *ssl = NULL; 113 int failure = 1; 114 int len; 115 116 fprintf(stderr, "Test %d - %s\n", test_no, tpt->desc); 117 118 if ((out = malloc(TLS_PRF_OUT_LEN)) == NULL) 119 errx(1, "failed to allocate out"); 120 121 if ((ssl_ctx = SSL_CTX_new(tpt->ssl_method())) == NULL) 122 errx(1, "failed to create SSL context"); 123 if ((ssl = SSL_new(ssl_ctx)) == NULL) 124 errx(1, "failed to create SSL context"); 125 126 if ((cipher = ssl3_get_cipher_by_value(tpt->cipher_value)) == NULL) { 127 fprintf(stderr, "FAIL: no cipher %hx\n", tpt->cipher_value); 128 goto failure; 129 } 130 131 ssl->s3->hs.cipher = cipher; 132 133 for (len = 1; len <= TLS_PRF_OUT_LEN; len++) { 134 memset(out, 'A', TLS_PRF_OUT_LEN); 135 136 if (tls1_PRF(ssl, TLS_PRF_SECRET, sizeof(TLS_PRF_SECRET), 137 TLS_PRF_SEED1, sizeof(TLS_PRF_SEED1), TLS_PRF_SEED2, 138 sizeof(TLS_PRF_SEED2), TLS_PRF_SEED3, sizeof(TLS_PRF_SEED3), 139 TLS_PRF_SEED4, sizeof(TLS_PRF_SEED4), TLS_PRF_SEED5, 140 sizeof(TLS_PRF_SEED5), out, len) != 1) { 141 fprintf(stderr, "FAIL: tls_PRF failed for len %d\n", 142 len); 143 goto failure; 144 } 145 146 if (memcmp(out, tpt->out, len) != 0) { 147 fprintf(stderr, "FAIL: tls_PRF output differs for " 148 "len %d\n", len); 149 fprintf(stderr, "output:\n"); 150 hexdump(out, TLS_PRF_OUT_LEN); 151 fprintf(stderr, "test data:\n"); 152 hexdump(tpt->out, TLS_PRF_OUT_LEN); 153 fprintf(stderr, "\n"); 154 goto failure; 155 } 156 } 157 158 failure = 0; 159 160 failure: 161 SSL_free(ssl); 162 SSL_CTX_free(ssl_ctx); 163 164 free(out); 165 166 return failure; 167 } 168 169 int 170 main(int argc, char **argv) 171 { 172 int failed = 0; 173 size_t i; 174 175 SSL_library_init(); 176 SSL_load_error_strings(); 177 178 for (i = 0; i < N_TLS_PRF_TESTS; i++) 179 failed |= do_tls_prf_test(i, &tls_prf_tests[i]); 180 181 return failed; 182 } 183