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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/stl_compat.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
-
- // EVP_AEAD_CTX lacks a zero state, so it doesn't fit easily into
- // ScopedOpenSSLContext.
- class EVP_AEAD_CTXScoper {
- public:
- EVP_AEAD_CTXScoper(EVP_AEAD_CTX *ctx) : ctx_(ctx) {}
- ~EVP_AEAD_CTXScoper() {
- EVP_AEAD_CTX_cleanup(ctx_);
- }
- private:
- EVP_AEAD_CTX *ctx_;
- };
-
- 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;
- }
-
- EVP_AEAD_CTX ctx;
- if (!EVP_AEAD_CTX_init_with_direction(&ctx, aead, bssl::vector_data(&key),
- key.size(), tag.size(),
- evp_aead_seal)) {
- t->PrintLine("Failed to init AEAD.");
- return false;
- }
- EVP_AEAD_CTXScoper cleanup(&ctx);
-
- 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, bssl::vector_data(&out), &out_len, out.size(),
- bssl::vector_data(&nonce), nonce.size(),
- bssl::vector_data(&in), in.size(),
- bssl::vector_data(&ad), 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(bssl::vector_data(&ct), ct.size(),
- bssl::vector_data(&out), ct.size()) ||
- !t->ExpectBytesEqual(bssl::vector_data(&tag), tag.size(),
- bssl::vector_data(&out) + ct.size(), tag.size())) {
- return false;
- }
- } else {
- out.resize(ct.size() + tag.size());
- memcpy(bssl::vector_data(&out), bssl::vector_data(&ct), ct.size());
- memcpy(bssl::vector_data(&out) + ct.size(), bssl::vector_data(&tag),
- tag.size());
- }
-
- // The "stateful" AEADs for implementing pre-AEAD cipher suites need to be
- // reset after each operation.
- EVP_AEAD_CTX_cleanup(&ctx);
- if (!EVP_AEAD_CTX_init_with_direction(&ctx, aead, bssl::vector_data(&key),
- 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,
- bssl::vector_data(&out2), &out2_len, out2.size(),
- bssl::vector_data(&nonce), nonce.size(),
- bssl::vector_data(&out), out.size(),
- bssl::vector_data(&ad), 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(bssl::vector_data(&in), in.size(),
- bssl::vector_data(&out2), out2.size())) {
- return false;
- }
-
- // The "stateful" AEADs for implementing pre-AEAD cipher suites need to be
- // reset after each operation.
- EVP_AEAD_CTX_cleanup(&ctx);
- if (!EVP_AEAD_CTX_init_with_direction(&ctx, aead, bssl::vector_data(&key),
- 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, bssl::vector_data(&out2), &out2_len, out2.size(),
- bssl::vector_data(&nonce), nonce.size(),
- bssl::vector_data(&out), out.size(),
- bssl::vector_data(&ad), 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.
- EVP_AEAD_CTX_cleanup(&ctx);
- if (!EVP_AEAD_CTX_init_with_direction(&ctx, aead, bssl::vector_data(&key),
- 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, bssl::vector_data(&out2), &out2_len, out2.size(),
- bssl::vector_data(&nonce), nonce.size(),
- bssl::vector_data(&out), out.size(),
- bssl::vector_data(&ad), 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;
- }
-
- struct AEADName {
- const char name[40];
- const EVP_AEAD *(*func)(void);
- };
-
- static const struct AEADName kAEADs[] = {
- { "aes-128-gcm", EVP_aead_aes_128_gcm },
- { "aes-256-gcm", EVP_aead_aes_256_gcm },
- { "chacha20-poly1305", EVP_aead_chacha20_poly1305 },
- { "rc4-md5-tls", EVP_aead_rc4_md5_tls },
- { "rc4-sha1-tls", EVP_aead_rc4_sha1_tls },
- { "aes-128-cbc-sha1-tls", EVP_aead_aes_128_cbc_sha1_tls },
- { "aes-128-cbc-sha1-tls-implicit-iv", EVP_aead_aes_128_cbc_sha1_tls_implicit_iv },
- { "aes-128-cbc-sha256-tls", EVP_aead_aes_128_cbc_sha256_tls },
- { "aes-256-cbc-sha1-tls", EVP_aead_aes_256_cbc_sha1_tls },
- { "aes-256-cbc-sha1-tls-implicit-iv", EVP_aead_aes_256_cbc_sha1_tls_implicit_iv },
- { "aes-256-cbc-sha256-tls", EVP_aead_aes_256_cbc_sha256_tls },
- { "aes-256-cbc-sha384-tls", EVP_aead_aes_256_cbc_sha384_tls },
- { "des-ede3-cbc-sha1-tls", EVP_aead_des_ede3_cbc_sha1_tls },
- { "des-ede3-cbc-sha1-tls-implicit-iv", EVP_aead_des_ede3_cbc_sha1_tls_implicit_iv },
- { "rc4-md5-ssl3", EVP_aead_rc4_md5_ssl3 },
- { "rc4-sha1-ssl3", EVP_aead_rc4_sha1_ssl3 },
- { "aes-128-cbc-sha1-ssl3", EVP_aead_aes_128_cbc_sha1_ssl3 },
- { "aes-256-cbc-sha1-ssl3", EVP_aead_aes_256_cbc_sha1_ssl3 },
- { "des-ede3-cbc-sha1-ssl3", EVP_aead_des_ede3_cbc_sha1_ssl3 },
- { "aes-128-key-wrap", EVP_aead_aes_128_key_wrap },
- { "aes-256-key-wrap", EVP_aead_aes_256_key_wrap },
- { "aes-128-ctr-hmac-sha256", EVP_aead_aes_128_ctr_hmac_sha256 },
- { "aes-256-ctr-hmac-sha256", EVP_aead_aes_256_ctr_hmac_sha256 },
- { "", NULL },
- };
-
- 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 EVP_AEAD *aead;
- for (unsigned i = 0;; i++) {
- const struct AEADName &aead_name = kAEADs[i];
- if (aead_name.func == NULL) {
- fprintf(stderr, "Unknown AEAD: %s\n", argv[1]);
- return 2;
- }
- if (strcmp(aead_name.name, argv[1]) == 0) {
- aead = aead_name.func();
- break;
- }
- }
-
- if (!TestCleanupAfterInitFailure(aead)) {
- return 1;
- }
-
- return FileTestMain(TestAEAD, const_cast<EVP_AEAD*>(aead), argv[2]);
- }
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