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/* Copyright (c) 2017, 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. */
// cavp_keywrap_test processes a NIST CAVP AES test vector request file and
// emits the corresponding response.
#include <stdlib.h>
#include <openssl/aes.h>
#include <openssl/crypto.h>
#include "../crypto/test/file_test.h"
#include "cavp_test_util.h"
namespace {
struct TestCtx {
bool encrypt;
bool padding;
};
} // namespace
static bool AESKeyWrap(std::vector<uint8_t> *out, bool encrypt,
const std::vector<uint8_t> &key,
const std::vector<uint8_t> &in) {
size_t key_bits = key.size() * 8;
if (key_bits != 128 && key_bits != 192 && key_bits != 256) {
return false;
}
AES_KEY aes_key;
if (encrypt) {
out->resize(in.size() + 8);
if (AES_set_encrypt_key(key.data(), key_bits, &aes_key) ||
AES_wrap_key(&aes_key, nullptr, out->data(), in.data(), in.size()) ==
-1) {
return false;
}
} else {
out->resize(in.size() - 8);
if (AES_set_decrypt_key(key.data(), key_bits, &aes_key) ||
AES_unwrap_key(&aes_key, nullptr, out->data(), in.data(), in.size()) ==
-1) {
return false;
}
}
return true;
}
static bool AESKeyWrapWithPadding(std::vector<uint8_t> *out, bool encrypt,
const std::vector<uint8_t> &key,
const std::vector<uint8_t> &in) {
const size_t key_bits = key.size() * 8;
if (key_bits != 128 && key_bits != 192 && key_bits != 256) {
return false;
}
AES_KEY aes_key;
size_t out_len;
if (encrypt) {
out->resize(in.size() + 15);
if (AES_set_encrypt_key(key.data(), key_bits, &aes_key) ||
!AES_wrap_key_padded(&aes_key, out->data(), &out_len, out->size(),
in.data(), in.size())) {
return false;
}
} else {
out->resize(in.size());
if (AES_set_decrypt_key(key.data(), key_bits, &aes_key) ||
!AES_unwrap_key_padded(&aes_key, out->data(), &out_len, out->size(),
in.data(), in.size())) {
return false;
}
}
out->resize(out_len);
return true;
}
static bool TestCipher(FileTest *t, void *arg) {
TestCtx *ctx = reinterpret_cast<TestCtx *>(arg);
std::string count, unused, in_label = ctx->encrypt ? "P" : "C",
result_label = ctx->encrypt ? "C" : "P";
std::vector<uint8_t> key, in, result;
// clang-format off
if (!t->GetInstruction(&unused, "PLAINTEXT LENGTH") ||
!t->GetAttribute(&count, "COUNT") ||
!t->GetBytes(&key, "K") ||
!t->GetBytes(&in, in_label)) {
return false;
}
// clang-format on
auto wrap_function = AESKeyWrap;
if (ctx->padding) {
wrap_function = AESKeyWrapWithPadding;
}
printf("%s", t->CurrentTestToString().c_str());
if (!wrap_function(&result, ctx->encrypt, key, in)) {
if (ctx->encrypt) {
return false;
} else {
printf("FAIL\r\n\r\n");
}
} else {
printf("%s = %s\r\n\r\n", result_label.c_str(),
EncodeHex(result.data(), result.size()).c_str());
}
return true;
}
static int usage(char *arg) {
fprintf(
stderr,
"usage: %s (enc|dec|enc-pad|dec-pad) (128|192|256) <test file>\n",
arg);
return 1;
}
int cavp_keywrap_test_main(int argc, char **argv) {
if (argc != 4) {
return usage(argv[0]);
}
const std::string op(argv[1]);
bool encrypt = false;
bool padding = false;
if (op == "enc") {
encrypt = true;
} else if (op == "dec") {
} else if (op == "enc-pad") {
encrypt = true;
padding = true;
} else if (op == "dec-pad") {
padding = true;
} else {
return usage(argv[0]);
}
TestCtx ctx = {encrypt, padding};
FileTest::Options opts;
opts.path = argv[3];
opts.callback = TestCipher;
opts.arg = &ctx;
opts.silent = true;
opts.comment_callback = EchoComment;
return FileTestMain(opts);
}
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