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NIAP requires that the TLS KDF be tested by CAVP so this change moves the PRF into crypto/fipsmodule/tls and adds a test harness for it. Like the KAS tests, this is only triggered when “-niap” is passed to run_cavp.go. Change-Id: Iaa4973d915853c8e367e6106d829e44fcf1b4ce5 Reviewed-on: https://boringssl-review.googlesource.com/24666 Reviewed-by: Adam Langley <[email protected]>
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/* Copyright (c) 2018, Google Inc. | ||
* | ||
* Permission to use, copy, modify, and/or distribute this software for any | ||
* purpose with or without fee is hereby granted, provided that the above | ||
* copyright notice and this permission notice appear in all copies. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | ||
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | ||
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | ||
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ | ||
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#ifndef OPENSSL_HEADER_CRYPTO_FIPSMODULE_TLS_INTERNAL_H | ||
#define OPENSSL_HEADER_CRYPTO_FIPSMODULE_TLS_INTERNAL_H | ||
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#include <openssl/base.h> | ||
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#if defined(__cplusplus) | ||
extern "C" { | ||
#endif | ||
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// tls1_prf calculates |out_len| bytes of the TLS PDF, using |digest|, and | ||
// writes them to |out|. It returns one on success and zero on error. | ||
OPENSSL_EXPORT int CRYPTO_tls1_prf(const EVP_MD *digest, | ||
uint8_t *out, size_t out_len, | ||
const uint8_t *secret, size_t secret_len, | ||
const char *label, size_t label_len, | ||
const uint8_t *seed1, size_t seed1_len, | ||
const uint8_t *seed2, size_t seed2_len); | ||
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#if defined(__cplusplus) | ||
} | ||
#endif | ||
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#endif // OPENSSL_HEADER_CRYPTO_FIPSMODULE_TLS_INTERNAL_H |
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/* ==================================================================== | ||
* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. | ||
* | ||
* Redistribution and use in source and binary forms, with or without | ||
* modification, are permitted provided that the following conditions | ||
* are met: | ||
* | ||
* 1. Redistributions of source code must retain the above copyright | ||
* notice, this list of conditions and the following disclaimer. | ||
* | ||
* 2. Redistributions in binary form must reproduce the above copyright | ||
* notice, this list of conditions and the following disclaimer in | ||
* the documentation and/or other materials provided with the | ||
* distribution. | ||
* | ||
* 3. All advertising materials mentioning features or use of this | ||
* software must display the following acknowledgment: | ||
* "This product includes software developed by the OpenSSL Project | ||
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | ||
* | ||
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | ||
* endorse or promote products derived from this software without | ||
* prior written permission. For written permission, please contact | ||
* [email protected]. | ||
* | ||
* 5. Products derived from this software may not be called "OpenSSL" | ||
* nor may "OpenSSL" appear in their names without prior written | ||
* permission of the OpenSSL Project. | ||
* | ||
* 6. Redistributions of any form whatsoever must retain the following | ||
* acknowledgment: | ||
* "This product includes software developed by the OpenSSL Project | ||
* for use in the OpenSSL Toolkit (http://www.openssl.org/)" | ||
* | ||
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | ||
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | ||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | ||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | ||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | ||
* OF THE POSSIBILITY OF SUCH DAMAGE. | ||
* ==================================================================== | ||
* | ||
* This product includes cryptographic software written by Eric Young | ||
* ([email protected]). This product includes software written by Tim | ||
* Hudson ([email protected]). */ | ||
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#include <openssl/hmac.h> | ||
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#include "internal.h" | ||
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// tls1_P_hash computes the TLS P_<hash> function as described in RFC 5246, | ||
// section 5. It XORs |out_len| bytes to |out|, using |md| as the hash and | ||
// |secret| as the secret. |label|, |seed1|, and |seed2| are concatenated to | ||
// form the seed parameter. It returns true on success and false on failure. | ||
static int tls1_P_hash(uint8_t *out, size_t out_len, | ||
const EVP_MD *md, | ||
const uint8_t *secret, size_t secret_len, | ||
const char *label, size_t label_len, | ||
const uint8_t *seed1, size_t seed1_len, | ||
const uint8_t *seed2, size_t seed2_len) { | ||
HMAC_CTX ctx, ctx_tmp, ctx_init; | ||
uint8_t A1[EVP_MAX_MD_SIZE]; | ||
unsigned A1_len; | ||
int ret = 0; | ||
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const size_t chunk = EVP_MD_size(md); | ||
HMAC_CTX_init(&ctx); | ||
HMAC_CTX_init(&ctx_tmp); | ||
HMAC_CTX_init(&ctx_init); | ||
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if (!HMAC_Init_ex(&ctx_init, secret, secret_len, md, NULL) || | ||
!HMAC_CTX_copy_ex(&ctx, &ctx_init) || | ||
!HMAC_Update(&ctx, (const uint8_t *) label, label_len) || | ||
!HMAC_Update(&ctx, seed1, seed1_len) || | ||
!HMAC_Update(&ctx, seed2, seed2_len) || | ||
!HMAC_Final(&ctx, A1, &A1_len)) { | ||
goto err; | ||
} | ||
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for (;;) { | ||
unsigned len; | ||
uint8_t hmac[EVP_MAX_MD_SIZE]; | ||
if (!HMAC_CTX_copy_ex(&ctx, &ctx_init) || | ||
!HMAC_Update(&ctx, A1, A1_len) || | ||
// Save a copy of |ctx| to compute the next A1 value below. | ||
(out_len > chunk && !HMAC_CTX_copy_ex(&ctx_tmp, &ctx)) || | ||
!HMAC_Update(&ctx, (const uint8_t *) label, label_len) || | ||
!HMAC_Update(&ctx, seed1, seed1_len) || | ||
!HMAC_Update(&ctx, seed2, seed2_len) || | ||
!HMAC_Final(&ctx, hmac, &len)) { | ||
goto err; | ||
} | ||
assert(len == chunk); | ||
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// XOR the result into |out|. | ||
if (len > out_len) { | ||
len = out_len; | ||
} | ||
for (unsigned i = 0; i < len; i++) { | ||
out[i] ^= hmac[i]; | ||
} | ||
out += len; | ||
out_len -= len; | ||
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if (out_len == 0) { | ||
break; | ||
} | ||
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// Calculate the next A1 value. | ||
if (!HMAC_Final(&ctx_tmp, A1, &A1_len)) { | ||
goto err; | ||
} | ||
} | ||
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ret = 1; | ||
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err: | ||
OPENSSL_cleanse(A1, sizeof(A1)); | ||
HMAC_CTX_cleanup(&ctx); | ||
HMAC_CTX_cleanup(&ctx_tmp); | ||
HMAC_CTX_cleanup(&ctx_init); | ||
return ret; | ||
} | ||
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int CRYPTO_tls1_prf(const EVP_MD *digest, | ||
uint8_t *out, size_t out_len, | ||
const uint8_t *secret, size_t secret_len, | ||
const char *label, size_t label_len, | ||
const uint8_t *seed1, size_t seed1_len, | ||
const uint8_t *seed2, size_t seed2_len) { | ||
if (out_len == 0) { | ||
return 1; | ||
} | ||
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OPENSSL_memset(out, 0, out_len); | ||
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if (digest == EVP_md5_sha1()) { | ||
// If using the MD5/SHA1 PRF, |secret| is partitioned between MD5 and SHA-1. | ||
size_t secret_half = secret_len - (secret_len / 2); | ||
if (!tls1_P_hash(out, out_len, EVP_md5(), secret, secret_half, label, | ||
label_len, seed1, seed1_len, seed2, seed2_len)) { | ||
return 0; | ||
} | ||
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// Note that, if |secret_len| is odd, the two halves share a byte. | ||
secret += secret_len - secret_half; | ||
secret_len = secret_half; | ||
digest = EVP_sha1(); | ||
} | ||
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return tls1_P_hash(out, out_len, digest, secret, secret_len, label, label_len, | ||
seed1, seed1_len, seed2, seed2_len); | ||
} |
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Original file line number | Diff line number | Diff line change |
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/* Copyright (c) 2018, Google Inc. | ||
* | ||
* Permission to use, copy, modify, and/or distribute this software for any | ||
* purpose with or without fee is hereby granted, provided that the above | ||
* copyright notice and this permission notice appear in all copies. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | ||
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | ||
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | ||
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ | ||
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// cavp_tlskdf_test processes NIST TLS KDF test vectors and emits the | ||
// corresponding response. | ||
// See https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Algorithm-Validation-Program/documents/components/askdfvs.pdf, section 6.4. | ||
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#include <vector> | ||
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#include <openssl/digest.h> | ||
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#include "cavp_test_util.h" | ||
#include "../crypto/fipsmodule/tls/internal.h" | ||
#include "../crypto/test/file_test.h" | ||
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static bool TestTLSKDF(FileTest *t, void *arg) { | ||
const EVP_MD *md = nullptr; | ||
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if (t->HasInstruction("TLS 1.0/1.1")) { | ||
md = EVP_md5_sha1(); | ||
} else if (t->HasInstruction("TLS 1.2")) { | ||
if (t->HasInstruction("SHA-256")) { | ||
md = EVP_sha256(); | ||
} else if (t->HasInstruction("SHA-384")) { | ||
md = EVP_sha384(); | ||
} else if (t->HasInstruction("SHA-512")) { | ||
md = EVP_sha512(); | ||
} | ||
} | ||
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if (md == nullptr) { | ||
return false; | ||
} | ||
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std::string key_block_len_str; | ||
std::vector<uint8_t> premaster, server_random, client_random, | ||
key_block_server_random, key_block_client_random; | ||
if (!t->GetBytes(&premaster, "pre_master_secret") || | ||
!t->GetBytes(&server_random, "serverHello_random") || | ||
!t->GetBytes(&client_random, "clientHello_random") || | ||
// The NIST tests specify different client and server randoms for the | ||
// expansion step from the master-secret step. This is impossible in TLS. | ||
!t->GetBytes(&key_block_server_random, "server_random") || | ||
!t->GetBytes(&key_block_client_random, "client_random") || | ||
!t->GetInstruction(&key_block_len_str, "key block length") || | ||
// These are ignored. | ||
!t->HasAttribute("COUNT") || | ||
!t->HasInstruction("pre-master secret length")) { | ||
return false; | ||
} | ||
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uint8_t master_secret[48]; | ||
static const char kMasterSecretLabel[] = "master secret"; | ||
if (!CRYPTO_tls1_prf(md, master_secret, sizeof(master_secret), | ||
premaster.data(), premaster.size(), kMasterSecretLabel, | ||
sizeof(kMasterSecretLabel) - 1, client_random.data(), | ||
client_random.size(), server_random.data(), | ||
server_random.size())) { | ||
return false; | ||
} | ||
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errno = 0; | ||
const long int key_block_bits = | ||
strtol(key_block_len_str.c_str(), nullptr, 10); | ||
if (errno != 0 || key_block_bits <= 0 || (key_block_bits & 7) != 0) { | ||
return false; | ||
} | ||
const size_t key_block_len = key_block_bits / 8; | ||
std::vector<uint8_t> key_block(key_block_len); | ||
static const char kLabel[] = "key expansion"; | ||
if (!CRYPTO_tls1_prf( | ||
md, key_block.data(), key_block.size(), master_secret, | ||
sizeof(master_secret), kLabel, sizeof(kLabel) - 1, | ||
key_block_server_random.data(), key_block_server_random.size(), | ||
key_block_client_random.data(), key_block_client_random.size())) { | ||
return false; | ||
} | ||
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printf("%smaster_secret = %s\r\nkey_block = %s\r\n\r\n", | ||
t->CurrentTestToString().c_str(), | ||
EncodeHex(master_secret, sizeof(master_secret)).c_str(), | ||
EncodeHex(key_block.data(), key_block.size()).c_str()); | ||
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return true; | ||
} | ||
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int cavp_tlskdf_test_main(int argc, char **argv) { | ||
if (argc != 2) { | ||
fprintf(stderr, "usage: %s <test file>\n", argv[0]); | ||
return 1; | ||
} | ||
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FileTest::Options opts; | ||
opts.path = argv[1]; | ||
opts.callback = TestTLSKDF; | ||
opts.silent = true; | ||
opts.comment_callback = EchoComment; | ||
return FileTestMain(opts); | ||
} |
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