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boringssl/crypto/cipher_extra/cipher_test.cc

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/*
* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 2015 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
* licensing@OpenSSL.org.
*
* 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.
* ====================================================================
*/
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <algorithm>
#include <string>
#include <vector>
#include <gtest/gtest.h>
#include <openssl/aes.h>
#include <openssl/cipher.h>
#include <openssl/err.h>
#include <openssl/nid.h>
#include <openssl/rand.h>
#include <openssl/sha.h>
#include <openssl/span.h>
#include "../test/file_test.h"
#include "../test/test_util.h"
#include "../test/wycheproof_util.h"
#include "./internal.h"
static const EVP_CIPHER *GetCipher(const std::string &name) {
if (name == "DES-CBC") {
return EVP_des_cbc();
} else if (name == "DES-ECB") {
return EVP_des_ecb();
} else if (name == "DES-EDE") {
return EVP_des_ede();
} else if (name == "DES-EDE3") {
return EVP_des_ede3();
} else if (name == "DES-EDE-CBC") {
return EVP_des_ede_cbc();
} else if (name == "DES-EDE3-CBC") {
return EVP_des_ede3_cbc();
} else if (name == "RC4") {
return EVP_rc4();
} else if (name == "AES-128-ECB") {
return EVP_aes_128_ecb();
} else if (name == "AES-256-ECB") {
return EVP_aes_256_ecb();
} else if (name == "AES-128-CBC") {
return EVP_aes_128_cbc();
} else if (name == "AES-128-GCM") {
return EVP_aes_128_gcm();
} else if (name == "AES-128-OFB") {
return EVP_aes_128_ofb();
} else if (name == "AES-192-CBC") {
return EVP_aes_192_cbc();
} else if (name == "AES-192-CTR") {
return EVP_aes_192_ctr();
} else if (name == "AES-192-ECB") {
return EVP_aes_192_ecb();
} else if (name == "AES-192-OFB") {
return EVP_aes_192_ofb();
} else if (name == "AES-256-CBC") {
return EVP_aes_256_cbc();
} else if (name == "AES-128-CTR") {
return EVP_aes_128_ctr();
} else if (name == "AES-256-CTR") {
return EVP_aes_256_ctr();
} else if (name == "AES-256-GCM") {
return EVP_aes_256_gcm();
} else if (name == "AES-256-OFB") {
return EVP_aes_256_ofb();
}
return nullptr;
}
static bool DoCipher(EVP_CIPHER_CTX *ctx, std::vector<uint8_t> *out,
bssl::Span<const uint8_t> in, size_t chunk,
bool in_place) {
size_t max_out = in.size();
if ((EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_NO_PADDING) == 0 &&
EVP_CIPHER_CTX_encrypting(ctx)) {
unsigned block_size = EVP_CIPHER_CTX_block_size(ctx);
max_out += block_size - (max_out % block_size);
}
out->resize(max_out);
if (in_place) {
std::copy(in.begin(), in.end(), out->begin());
in = bssl::MakeConstSpan(out->data(), in.size());
}
size_t total = 0;
int len;
while (!in.empty()) {
size_t todo = chunk == 0 ? in.size() : std::min(in.size(), chunk);
EXPECT_LE(todo, static_cast<size_t>(INT_MAX));
if (!EVP_CipherUpdate(ctx, out->data() + total, &len, in.data(),
static_cast<int>(todo))) {
return false;
}
EXPECT_GE(len, 0);
total += static_cast<size_t>(len);
in = in.subspan(todo);
}
if (!EVP_CipherFinal_ex(ctx, out->data() + total, &len)) {
return false;
}
EXPECT_GE(len, 0);
total += static_cast<size_t>(len);
out->resize(total);
return true;
}
static void TestOperation(FileTest *t, const EVP_CIPHER *cipher, bool encrypt,
bool copy, bool in_place, size_t chunk_size,
const std::vector<uint8_t> &key,
const std::vector<uint8_t> &iv,
const std::vector<uint8_t> &plaintext,
const std::vector<uint8_t> &ciphertext,
const std::vector<uint8_t> &aad,
const std::vector<uint8_t> &tag) {
const std::vector<uint8_t> *in, *out;
if (encrypt) {
in = &plaintext;
out = &ciphertext;
} else {
in = &ciphertext;
out = &plaintext;
}
bool is_aead = EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE;
bssl::ScopedEVP_CIPHER_CTX ctx1;
ASSERT_TRUE(EVP_CipherInit_ex(ctx1.get(), cipher, nullptr, nullptr, nullptr,
encrypt ? 1 : 0));
if (t->HasAttribute("IV")) {
if (is_aead) {
ASSERT_TRUE(EVP_CIPHER_CTX_ctrl(ctx1.get(), EVP_CTRL_AEAD_SET_IVLEN,
iv.size(), 0));
} else {
ASSERT_EQ(iv.size(), EVP_CIPHER_CTX_iv_length(ctx1.get()));
}
}
bssl::ScopedEVP_CIPHER_CTX ctx2;
EVP_CIPHER_CTX *ctx = ctx1.get();
if (copy) {
ASSERT_TRUE(EVP_CIPHER_CTX_copy(ctx2.get(), ctx1.get()));
ctx = ctx2.get();
}
if (is_aead && !encrypt) {
ASSERT_TRUE(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, tag.size(),
const_cast<uint8_t *>(tag.data())));
}
// The ciphers are run with no padding. For each of the ciphers we test, the
// output size matches the input size.
ASSERT_EQ(in->size(), out->size());
ASSERT_TRUE(EVP_CIPHER_CTX_set_key_length(ctx, key.size()));
ASSERT_TRUE(
EVP_CipherInit_ex(ctx, nullptr, nullptr, key.data(), iv.data(), -1));
// Note: the deprecated |EVP_CIPHER|-based AEAD API is sensitive to whether
// parameters are NULL, so it is important to skip the |in| and |aad|
// |EVP_CipherUpdate| calls when empty.
if (!aad.empty()) {
int unused;
ASSERT_TRUE(
EVP_CipherUpdate(ctx, nullptr, &unused, aad.data(), aad.size()));
}
ASSERT_TRUE(EVP_CIPHER_CTX_set_padding(ctx, 0));
std::vector<uint8_t> result;
ASSERT_TRUE(DoCipher(ctx, &result, *in, chunk_size, in_place));
EXPECT_EQ(Bytes(*out), Bytes(result));
if (encrypt && is_aead) {
uint8_t rtag[16];
ASSERT_LE(tag.size(), sizeof(rtag));
ASSERT_TRUE(
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, tag.size(), rtag));
EXPECT_EQ(Bytes(tag), Bytes(rtag, tag.size()));
}
// Additionally test low-level AES mode APIs. Skip runs where |copy| because
// it does not apply.
if (!copy) {
int nid = EVP_CIPHER_nid(cipher);
bool is_ctr = nid == NID_aes_128_ctr || nid == NID_aes_192_ctr ||
nid == NID_aes_256_ctr;
bool is_cbc = nid == NID_aes_128_cbc || nid == NID_aes_192_cbc ||
nid == NID_aes_256_cbc;
bool is_ofb = nid == NID_aes_128_ofb128 || nid == NID_aes_192_ofb128 ||
nid == NID_aes_256_ofb128;
if (is_ctr || is_cbc || is_ofb) {
AES_KEY aes;
if (encrypt || !is_cbc) {
ASSERT_EQ(0, AES_set_encrypt_key(key.data(), key.size() * 8, &aes));
} else {
ASSERT_EQ(0, AES_set_decrypt_key(key.data(), key.size() * 8, &aes));
}
// The low-level APIs all work in-place.
bssl::Span<const uint8_t> input = *in;
result.clear();
if (in_place) {
result = *in;
input = result;
} else {
result.resize(out->size());
}
bssl::Span<uint8_t> output = bssl::MakeSpan(result);
ASSERT_EQ(input.size(), output.size());
// The low-level APIs all use block-size IVs.
ASSERT_EQ(iv.size(), size_t{AES_BLOCK_SIZE});
uint8_t ivec[AES_BLOCK_SIZE];
OPENSSL_memcpy(ivec, iv.data(), iv.size());
if (is_ctr) {
unsigned num = 0;
uint8_t ecount_buf[AES_BLOCK_SIZE];
if (chunk_size == 0) {
AES_ctr128_encrypt(input.data(), output.data(), input.size(), &aes,
ivec, ecount_buf, &num);
} else {
do {
size_t todo = std::min(input.size(), chunk_size);
AES_ctr128_encrypt(input.data(), output.data(), todo, &aes, ivec,
ecount_buf, &num);
input = input.subspan(todo);
output = output.subspan(todo);
} while (!input.empty());
}
EXPECT_EQ(Bytes(*out), Bytes(result));
} else if (is_cbc && chunk_size % AES_BLOCK_SIZE == 0) {
// Note |AES_cbc_encrypt| requires block-aligned chunks.
if (chunk_size == 0) {
AES_cbc_encrypt(input.data(), output.data(), input.size(), &aes, ivec,
encrypt);
} else {
do {
size_t todo = std::min(input.size(), chunk_size);
AES_cbc_encrypt(input.data(), output.data(), todo, &aes, ivec,
encrypt);
input = input.subspan(todo);
output = output.subspan(todo);
} while (!input.empty());
}
EXPECT_EQ(Bytes(*out), Bytes(result));
} else if (is_ofb) {
int num = 0;
if (chunk_size == 0) {
AES_ofb128_encrypt(input.data(), output.data(), input.size(), &aes,
ivec, &num);
} else {
do {
size_t todo = std::min(input.size(), chunk_size);
AES_ofb128_encrypt(input.data(), output.data(), todo, &aes, ivec,
&num);
input = input.subspan(todo);
output = output.subspan(todo);
} while (!input.empty());
}
EXPECT_EQ(Bytes(*out), Bytes(result));
}
}
}
}
static void TestCipher(FileTest *t) {
std::string cipher_str;
ASSERT_TRUE(t->GetAttribute(&cipher_str, "Cipher"));
const EVP_CIPHER *cipher = GetCipher(cipher_str);
ASSERT_TRUE(cipher);
std::vector<uint8_t> key, iv, plaintext, ciphertext, aad, tag;
ASSERT_TRUE(t->GetBytes(&key, "Key"));
ASSERT_TRUE(t->GetBytes(&plaintext, "Plaintext"));
ASSERT_TRUE(t->GetBytes(&ciphertext, "Ciphertext"));
if (EVP_CIPHER_iv_length(cipher) > 0) {
ASSERT_TRUE(t->GetBytes(&iv, "IV"));
}
if (EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE) {
ASSERT_TRUE(t->GetBytes(&aad, "AAD"));
ASSERT_TRUE(t->GetBytes(&tag, "Tag"));
}
enum {
kEncrypt,
kDecrypt,
kBoth,
} operation = kBoth;
if (t->HasAttribute("Operation")) {
const std::string &str = t->GetAttributeOrDie("Operation");
if (str == "ENCRYPT") {
operation = kEncrypt;
} else if (str == "DECRYPT") {
operation = kDecrypt;
} else {
FAIL() << "Unknown operation: " << str;
}
}
const std::vector<size_t> chunk_sizes = {0, 1, 2, 5, 7, 8, 9, 15, 16,
17, 31, 32, 33, 63, 64, 65, 512};
for (size_t chunk_size : chunk_sizes) {
SCOPED_TRACE(chunk_size);
for (bool copy : {false, true}) {
SCOPED_TRACE(copy);
for (bool in_place : {false, true}) {
SCOPED_TRACE(in_place);
// By default, both directions are run, unless overridden by the
// operation.
if (operation != kDecrypt) {
SCOPED_TRACE("encrypt");
TestOperation(t, cipher, true /* encrypt */, copy, in_place,
chunk_size, key, iv, plaintext, ciphertext, aad, tag);
}
if (operation != kEncrypt) {
SCOPED_TRACE("decrypt");
TestOperation(t, cipher, false /* decrypt */, copy, in_place,
chunk_size, key, iv, plaintext, ciphertext, aad, tag);
}
}
}
}
}
TEST(CipherTest, TestVectors) {
FileTestGTest("crypto/cipher_extra/test/cipher_tests.txt", TestCipher);
}
TEST(CipherTest, CAVP_AES_128_CBC) {
FileTestGTest("crypto/cipher_extra/test/nist_cavp/aes_128_cbc.txt",
TestCipher);
}
TEST(CipherTest, CAVP_AES_128_CTR) {
FileTestGTest("crypto/cipher_extra/test/nist_cavp/aes_128_ctr.txt",
TestCipher);
}
TEST(CipherTest, CAVP_AES_192_CBC) {
FileTestGTest("crypto/cipher_extra/test/nist_cavp/aes_192_cbc.txt",
TestCipher);
}
TEST(CipherTest, CAVP_AES_192_CTR) {
FileTestGTest("crypto/cipher_extra/test/nist_cavp/aes_192_ctr.txt",
TestCipher);
}
TEST(CipherTest, CAVP_AES_256_CBC) {
FileTestGTest("crypto/cipher_extra/test/nist_cavp/aes_256_cbc.txt",
TestCipher);
}
TEST(CipherTest, CAVP_AES_256_CTR) {
FileTestGTest("crypto/cipher_extra/test/nist_cavp/aes_256_ctr.txt",
TestCipher);
}
TEST(CipherTest, CAVP_TDES_CBC) {
FileTestGTest("crypto/cipher_extra/test/nist_cavp/tdes_cbc.txt", TestCipher);
}
TEST(CipherTest, CAVP_TDES_ECB) {
FileTestGTest("crypto/cipher_extra/test/nist_cavp/tdes_ecb.txt", TestCipher);
}
TEST(CipherTest, WycheproofAESCBC) {
FileTestGTest(
"third_party/wycheproof_testvectors/aes_cbc_pkcs5_test.txt",
[](FileTest *t) {
t->IgnoreInstruction("type");
t->IgnoreInstruction("ivSize");
std::string key_size;
ASSERT_TRUE(t->GetInstruction(&key_size, "keySize"));
const EVP_CIPHER *cipher;
switch (atoi(key_size.c_str())) {
case 128:
cipher = EVP_aes_128_cbc();
break;
case 192:
cipher = EVP_aes_192_cbc();
break;
case 256:
cipher = EVP_aes_256_cbc();
break;
default:
FAIL() << "Unsupported key size: " << key_size;
}
std::vector<uint8_t> key, iv, msg, ct;
ASSERT_TRUE(t->GetBytes(&key, "key"));
ASSERT_TRUE(t->GetBytes(&iv, "iv"));
ASSERT_TRUE(t->GetBytes(&msg, "msg"));
ASSERT_TRUE(t->GetBytes(&ct, "ct"));
ASSERT_EQ(EVP_CIPHER_key_length(cipher), key.size());
ASSERT_EQ(EVP_CIPHER_iv_length(cipher), iv.size());
WycheproofResult result;
ASSERT_TRUE(GetWycheproofResult(t, &result));
bssl::ScopedEVP_CIPHER_CTX ctx;
std::vector<uint8_t> out;
const std::vector<size_t> chunk_sizes = {
0, 1, 2, 5, 7, 8, 9, 15, 16, 17, 31, 32, 33, 63, 64, 65, 512};
for (size_t chunk : chunk_sizes) {
SCOPED_TRACE(chunk);
for (bool in_place : {false, true}) {
SCOPED_TRACE(in_place);
if (result.IsValid()) {
ASSERT_TRUE(EVP_DecryptInit_ex(ctx.get(), cipher, nullptr,
key.data(), iv.data()));
ASSERT_TRUE(DoCipher(ctx.get(), &out, ct, chunk, in_place));
EXPECT_EQ(Bytes(msg), Bytes(out));
ASSERT_TRUE(EVP_EncryptInit_ex(ctx.get(), cipher, nullptr,
key.data(), iv.data()));
ASSERT_TRUE(DoCipher(ctx.get(), &out, msg, chunk, in_place));
EXPECT_EQ(Bytes(ct), Bytes(out));
} else {
ASSERT_TRUE(EVP_DecryptInit_ex(ctx.get(), cipher, nullptr,
key.data(), iv.data()));
EXPECT_FALSE(DoCipher(ctx.get(), &out, ct, chunk, in_place));
}
}
}
});
}
TEST(CipherTest, SHA1WithSecretSuffix) {
uint8_t buf[SHA_CBLOCK * 4];
RAND_bytes(buf, sizeof(buf));
// Hashing should run in time independent of the bytes.
CONSTTIME_SECRET(buf, sizeof(buf));
// Exhaustively testing interesting cases in this function is cubic in the
// block size, so we test in 3-byte increments.
constexpr size_t kSkip = 3;
// This value should be less than 8 to test the edge case when the 8-byte
// length wraps to the next block.
static_assert(kSkip < 8, "kSkip is too large");
// |EVP_sha1_final_with_secret_suffix| is sensitive to the public length of
// the partial block previously hashed. In TLS, this is the HMAC prefix, the
// header, and the public minimum padding length.
for (size_t prefix = 0; prefix < SHA_CBLOCK; prefix += kSkip) {
SCOPED_TRACE(prefix);
// The first block is treated differently, so we run with up to three
// blocks of length variability.
for (size_t max_len = 0; max_len < 3 * SHA_CBLOCK; max_len += kSkip) {
SCOPED_TRACE(max_len);
for (size_t len = 0; len <= max_len; len += kSkip) {
SCOPED_TRACE(len);
uint8_t expected[SHA_DIGEST_LENGTH];
SHA1(buf, prefix + len, expected);
CONSTTIME_DECLASSIFY(expected, sizeof(expected));
// Make a copy of the secret length to avoid interfering with the loop.
size_t secret_len = len;
CONSTTIME_SECRET(&secret_len, sizeof(secret_len));
SHA_CTX ctx;
SHA1_Init(&ctx);
SHA1_Update(&ctx, buf, prefix);
uint8_t computed[SHA_DIGEST_LENGTH];
ASSERT_TRUE(EVP_sha1_final_with_secret_suffix(
&ctx, computed, buf + prefix, secret_len, max_len));
CONSTTIME_DECLASSIFY(computed, sizeof(computed));
EXPECT_EQ(Bytes(expected), Bytes(computed));
}
}
}
}
TEST(CipherTest, GetCipher) {
const EVP_CIPHER *cipher = EVP_get_cipherbynid(NID_aes_128_gcm);
ASSERT_TRUE(cipher);
EXPECT_EQ(NID_aes_128_gcm, EVP_CIPHER_nid(cipher));
cipher = EVP_get_cipherbyname("aes-128-gcm");
ASSERT_TRUE(cipher);
EXPECT_EQ(NID_aes_128_gcm, EVP_CIPHER_nid(cipher));
cipher = EVP_get_cipherbyname("AES-128-GCM");
ASSERT_TRUE(cipher);
EXPECT_EQ(NID_aes_128_gcm, EVP_CIPHER_nid(cipher));
// We support a tcpdump-specific alias for 3DES.
cipher = EVP_get_cipherbyname("3des");
ASSERT_TRUE(cipher);
EXPECT_EQ(NID_des_ede3_cbc, EVP_CIPHER_nid(cipher));
}