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- /* Copyright (c) 2014, 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. */
-
- #include <stdint.h>
- #include <string.h>
-
- #include <vector>
-
- #include <openssl/aead.h>
- #include <openssl/crypto.h>
- #include <openssl/err.h>
-
- #include "../test/file_test.h"
- #include "../test/scoped_types.h"
-
-
- // This program tests an AEAD against a series of test vectors from a file,
- // using the FileTest format. As an example, here's a valid test case:
- //
- // KEY: 5a19f3173586b4c42f8412f4d5a786531b3231753e9e00998aec12fda8df10e4
- // NONCE: 978105dfce667bf4
- // IN: 6a4583908d
- // AD: b654574932
- // CT: 5294265a60
- // TAG: 1d45758621762e061368e68868e2f929
-
- static bool TestAEAD(FileTest *t, void *arg) {
- const EVP_AEAD *aead = reinterpret_cast<const EVP_AEAD*>(arg);
-
- std::vector<uint8_t> key, nonce, in, ad, ct, tag;
- if (!t->GetBytes(&key, "KEY") ||
- !t->GetBytes(&nonce, "NONCE") ||
- !t->GetBytes(&in, "IN") ||
- !t->GetBytes(&ad, "AD") ||
- !t->GetBytes(&ct, "CT") ||
- !t->GetBytes(&tag, "TAG")) {
- return false;
- }
-
- ScopedEVP_AEAD_CTX ctx;
- if (!EVP_AEAD_CTX_init_with_direction(ctx.get(), aead, key.data(), key.size(),
- tag.size(), evp_aead_seal)) {
- t->PrintLine("Failed to init AEAD.");
- return false;
- }
-
- std::vector<uint8_t> out(in.size() + EVP_AEAD_max_overhead(aead));
- if (!t->HasAttribute("NO_SEAL")) {
- size_t out_len;
- if (!EVP_AEAD_CTX_seal(ctx.get(), out.data(), &out_len, out.size(),
- nonce.data(), nonce.size(), in.data(), in.size(),
- ad.data(), ad.size())) {
- t->PrintLine("Failed to run AEAD.");
- return false;
- }
- out.resize(out_len);
-
- if (out.size() != ct.size() + tag.size()) {
- t->PrintLine("Bad output length: %u vs %u.", (unsigned)out_len,
- (unsigned)(ct.size() + tag.size()));
- return false;
- }
- if (!t->ExpectBytesEqual(ct.data(), ct.size(), out.data(), ct.size()) ||
- !t->ExpectBytesEqual(tag.data(), tag.size(), out.data() + ct.size(),
- tag.size())) {
- return false;
- }
- } else {
- out.resize(ct.size() + tag.size());
- memcpy(out.data(), ct.data(), ct.size());
- memcpy(out.data() + ct.size(), tag.data(), tag.size());
- }
-
- // The "stateful" AEADs for implementing pre-AEAD cipher suites need to be
- // reset after each operation.
- ctx.Reset();
- if (!EVP_AEAD_CTX_init_with_direction(ctx.get(), aead, key.data(), key.size(),
- tag.size(), evp_aead_open)) {
- t->PrintLine("Failed to init AEAD.");
- return false;
- }
-
- std::vector<uint8_t> out2(out.size());
- size_t out2_len;
- int ret = EVP_AEAD_CTX_open(ctx.get(), out2.data(), &out2_len, out2.size(),
- nonce.data(), nonce.size(), out.data(),
- out.size(), ad.data(), ad.size());
- if (t->HasAttribute("FAILS")) {
- if (ret) {
- t->PrintLine("Decrypted bad data.");
- return false;
- }
- ERR_clear_error();
- return true;
- }
-
- if (!ret) {
- t->PrintLine("Failed to decrypt.");
- return false;
- }
- out2.resize(out2_len);
- if (!t->ExpectBytesEqual(in.data(), in.size(), out2.data(), out2.size())) {
- return false;
- }
-
- // The "stateful" AEADs for implementing pre-AEAD cipher suites need to be
- // reset after each operation.
- ctx.Reset();
- if (!EVP_AEAD_CTX_init_with_direction(ctx.get(), aead, key.data(), key.size(),
- tag.size(), evp_aead_open)) {
- t->PrintLine("Failed to init AEAD.");
- return false;
- }
-
- // Garbage at the end isn't ignored.
- out.push_back(0);
- out2.resize(out.size());
- if (EVP_AEAD_CTX_open(ctx.get(), out2.data(), &out2_len, out2.size(),
- nonce.data(), nonce.size(), out.data(), out.size(),
- ad.data(), ad.size())) {
- t->PrintLine("Decrypted bad data with trailing garbage.");
- return false;
- }
- ERR_clear_error();
-
- // The "stateful" AEADs for implementing pre-AEAD cipher suites need to be
- // reset after each operation.
- ctx.Reset();
- if (!EVP_AEAD_CTX_init_with_direction(ctx.get(), aead, key.data(), key.size(),
- tag.size(), evp_aead_open)) {
- t->PrintLine("Failed to init AEAD.");
- return false;
- }
-
- // Verify integrity is checked.
- out[0] ^= 0x80;
- out.resize(out.size() - 1);
- out2.resize(out.size());
- if (EVP_AEAD_CTX_open(ctx.get(), out2.data(), &out2_len, out2.size(),
- nonce.data(), nonce.size(), out.data(), out.size(),
- ad.data(), ad.size())) {
- t->PrintLine("Decrypted bad data with corrupted byte.");
- return false;
- }
- ERR_clear_error();
-
- return true;
- }
-
- static int TestCleanupAfterInitFailure(const EVP_AEAD *aead) {
- EVP_AEAD_CTX ctx;
- uint8_t key[128];
-
- memset(key, 0, sizeof(key));
- const size_t key_len = EVP_AEAD_key_length(aead);
- if (key_len > sizeof(key)) {
- fprintf(stderr, "Key length of AEAD too long.\n");
- return 0;
- }
-
- if (EVP_AEAD_CTX_init(&ctx, aead, key, key_len,
- 9999 /* a silly tag length to trigger an error */,
- NULL /* ENGINE */) != 0) {
- fprintf(stderr, "A silly tag length didn't trigger an error!\n");
- return 0;
- }
- ERR_clear_error();
-
- /* Running a second, failed _init should not cause a memory leak. */
- if (EVP_AEAD_CTX_init(&ctx, aead, key, key_len,
- 9999 /* a silly tag length to trigger an error */,
- NULL /* ENGINE */) != 0) {
- fprintf(stderr, "A silly tag length didn't trigger an error!\n");
- return 0;
- }
- ERR_clear_error();
-
- /* Calling _cleanup on an |EVP_AEAD_CTX| after a failed _init should be a
- * no-op. */
- EVP_AEAD_CTX_cleanup(&ctx);
- return 1;
- }
-
- static bool TestWithAliasedBuffers(const EVP_AEAD *aead) {
- const size_t key_len = EVP_AEAD_key_length(aead);
- const size_t nonce_len = EVP_AEAD_nonce_length(aead);
- const size_t max_overhead = EVP_AEAD_max_overhead(aead);
-
- std::vector<uint8_t> key(key_len, 'a');
- ScopedEVP_AEAD_CTX ctx;
- if (!EVP_AEAD_CTX_init(ctx.get(), aead, key.data(), key_len,
- EVP_AEAD_DEFAULT_TAG_LENGTH, nullptr)) {
- return false;
- }
-
- static const uint8_t kPlaintext[260] =
- "testing123456testing123456testing123456testing123456testing123456testing"
- "123456testing123456testing123456testing123456testing123456testing123456t"
- "esting123456testing123456testing123456testing123456testing123456testing1"
- "23456testing123456testing123456testing12345";
- const std::vector<size_t> offsets = {
- 0, 1, 2, 8, 15, 16, 17, 31, 32, 33, 63,
- 64, 65, 95, 96, 97, 127, 128, 129, 255, 256, 257,
- };
-
- std::vector<uint8_t> nonce(nonce_len, 'b');
- std::vector<uint8_t> valid_encryption(sizeof(kPlaintext) + max_overhead);
- size_t valid_encryption_len;
- if (!EVP_AEAD_CTX_seal(
- ctx.get(), valid_encryption.data(), &valid_encryption_len,
- sizeof(kPlaintext) + max_overhead, nonce.data(), nonce_len,
- kPlaintext, sizeof(kPlaintext), nullptr, 0)) {
- fprintf(stderr, "EVP_AEAD_CTX_seal failed with disjoint buffers.\n");
- return false;
- }
-
- // Test with out != in which we expect to fail.
- std::vector<uint8_t> buffer(2 + valid_encryption_len);
- uint8_t *in = buffer.data() + 1;
- uint8_t *out1 = buffer.data();
- uint8_t *out2 = buffer.data() + 2;
-
- memcpy(in, kPlaintext, sizeof(kPlaintext));
- size_t out_len;
- if (EVP_AEAD_CTX_seal(ctx.get(), out1, &out_len,
- sizeof(kPlaintext) + max_overhead, nonce.data(),
- nonce_len, in, sizeof(kPlaintext), nullptr, 0) ||
- EVP_AEAD_CTX_seal(ctx.get(), out2, &out_len,
- sizeof(kPlaintext) + max_overhead, nonce.data(),
- nonce_len, in, sizeof(kPlaintext), nullptr, 0)) {
- fprintf(stderr, "EVP_AEAD_CTX_seal unexpectedly succeeded.\n");
- return false;
- }
- ERR_clear_error();
-
- memcpy(in, valid_encryption.data(), valid_encryption_len);
- if (EVP_AEAD_CTX_open(ctx.get(), out1, &out_len, valid_encryption_len,
- nonce.data(), nonce_len, in, valid_encryption_len,
- nullptr, 0) ||
- EVP_AEAD_CTX_open(ctx.get(), out2, &out_len, valid_encryption_len,
- nonce.data(), nonce_len, in, valid_encryption_len,
- nullptr, 0)) {
- fprintf(stderr, "EVP_AEAD_CTX_open unexpectedly succeeded.\n");
- return false;
- }
- ERR_clear_error();
-
- // Test with out == in, which we expect to work.
- memcpy(in, kPlaintext, sizeof(kPlaintext));
-
- if (!EVP_AEAD_CTX_seal(ctx.get(), in, &out_len,
- sizeof(kPlaintext) + max_overhead, nonce.data(),
- nonce_len, in, sizeof(kPlaintext), nullptr, 0)) {
- fprintf(stderr, "EVP_AEAD_CTX_seal failed in-place.\n");
- return false;
- }
-
- if (out_len != valid_encryption_len ||
- memcmp(in, valid_encryption.data(), out_len) != 0) {
- fprintf(stderr, "EVP_AEAD_CTX_seal produced bad output in-place.\n");
- return false;
- }
-
- memcpy(in, valid_encryption.data(), valid_encryption_len);
- if (!EVP_AEAD_CTX_open(ctx.get(), in, &out_len, valid_encryption_len,
- nonce.data(), nonce_len, in, valid_encryption_len,
- nullptr, 0)) {
- fprintf(stderr, "EVP_AEAD_CTX_open failed in-place.\n");
- return false;
- }
-
- if (out_len != sizeof(kPlaintext) ||
- memcmp(in, kPlaintext, out_len) != 0) {
- fprintf(stderr, "EVP_AEAD_CTX_open produced bad output in-place.\n");
- return false;
- }
-
- return true;
- }
-
- struct KnownAEAD {
- const char name[40];
- const EVP_AEAD *(*func)(void);
- // limited_implementation indicates that tests that assume a generic AEAD
- // interface should not be performed. For example, the key-wrap AEADs only
- // handle inputs that are a multiple of eight bytes in length and the
- // SSLv3/TLS AEADs have the concept of “direction”.
- bool limited_implementation;
- };
-
- static const struct KnownAEAD kAEADs[] = {
- { "aes-128-gcm", EVP_aead_aes_128_gcm, false },
- { "aes-256-gcm", EVP_aead_aes_256_gcm, false },
- { "chacha20-poly1305", EVP_aead_chacha20_poly1305, false },
- { "chacha20-poly1305-old", EVP_aead_chacha20_poly1305_old, false },
- { "rc4-md5-tls", EVP_aead_rc4_md5_tls, true },
- { "rc4-sha1-tls", EVP_aead_rc4_sha1_tls, true },
- { "aes-128-cbc-sha1-tls", EVP_aead_aes_128_cbc_sha1_tls, true },
- { "aes-128-cbc-sha1-tls-implicit-iv", EVP_aead_aes_128_cbc_sha1_tls_implicit_iv, true },
- { "aes-128-cbc-sha256-tls", EVP_aead_aes_128_cbc_sha256_tls, true },
- { "aes-256-cbc-sha1-tls", EVP_aead_aes_256_cbc_sha1_tls, true },
- { "aes-256-cbc-sha1-tls-implicit-iv", EVP_aead_aes_256_cbc_sha1_tls_implicit_iv, true },
- { "aes-256-cbc-sha256-tls", EVP_aead_aes_256_cbc_sha256_tls, true },
- { "aes-256-cbc-sha384-tls", EVP_aead_aes_256_cbc_sha384_tls, true },
- { "des-ede3-cbc-sha1-tls", EVP_aead_des_ede3_cbc_sha1_tls, true },
- { "des-ede3-cbc-sha1-tls-implicit-iv", EVP_aead_des_ede3_cbc_sha1_tls_implicit_iv, true },
- { "rc4-md5-ssl3", EVP_aead_rc4_md5_ssl3, true },
- { "rc4-sha1-ssl3", EVP_aead_rc4_sha1_ssl3, true },
- { "aes-128-cbc-sha1-ssl3", EVP_aead_aes_128_cbc_sha1_ssl3, true },
- { "aes-256-cbc-sha1-ssl3", EVP_aead_aes_256_cbc_sha1_ssl3, true },
- { "des-ede3-cbc-sha1-ssl3", EVP_aead_des_ede3_cbc_sha1_ssl3, true },
- { "aes-128-key-wrap", EVP_aead_aes_128_key_wrap, true },
- { "aes-256-key-wrap", EVP_aead_aes_256_key_wrap, true },
- { "aes-128-ctr-hmac-sha256", EVP_aead_aes_128_ctr_hmac_sha256, false },
- { "aes-256-ctr-hmac-sha256", EVP_aead_aes_256_ctr_hmac_sha256, false },
- { "", NULL, false },
- };
-
- int main(int argc, char **argv) {
- CRYPTO_library_init();
-
- if (argc != 3) {
- fprintf(stderr, "%s <aead> <test file.txt>\n", argv[0]);
- return 1;
- }
-
- const struct KnownAEAD *known_aead;
- for (unsigned i = 0;; i++) {
- known_aead = &kAEADs[i];
- if (known_aead->func == NULL) {
- fprintf(stderr, "Unknown AEAD: %s\n", argv[1]);
- return 2;
- }
- if (strcmp(known_aead->name, argv[1]) == 0) {
- break;
- }
- }
-
- const EVP_AEAD *const aead = known_aead->func();
-
- if (!TestCleanupAfterInitFailure(aead)) {
- return 1;
- }
-
- if (!known_aead->limited_implementation && !TestWithAliasedBuffers(aead)) {
- fprintf(stderr, "Aliased buffers test failed for %s.\n", known_aead->name);
- return 1;
- }
-
- return FileTestMain(TestAEAD, const_cast<EVP_AEAD*>(aead), argv[2]);
- }
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