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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_aes_gcm_test processes a NIST CAVP AES GCM test vector request file and
// emits the corresponding response.
#include <stdlib.h>
#include <openssl/aead.h>
#include <openssl/cipher.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include "../crypto/test/file_test.h"
#include "cavp_test_util.h"
namespace {
struct TestCtx {
const EVP_AEAD *aead;
};
}
static const EVP_AEAD *GetAEAD(const std::string &name, const bool enc) {
if (name == "aes-128-gcm") {
return EVP_aead_aes_128_gcm();
} else if (name == "aes-256-gcm") {
return EVP_aead_aes_256_gcm();
}
return nullptr;
}
static bool TestAEADEncrypt(FileTest *t, void *arg) {
TestCtx *ctx = reinterpret_cast<TestCtx *>(arg);
std::string key_len_str, iv_len_str, pt_len_str, aad_len_str, tag_len_str;
if (!t->GetInstruction(&key_len_str, "Keylen") ||
!t->GetInstruction(&iv_len_str, "IVlen") ||
!t->GetInstruction(&pt_len_str, "PTlen") ||
!t->GetInstruction(&aad_len_str, "AADlen") ||
!t->GetInstruction(&tag_len_str, "Taglen")) {
return false;
}
std::string count;
std::vector<uint8_t> key, iv, pt, aad, tag, ct;
if (!t->GetAttribute(&count, "Count") ||
!t->GetBytes(&key, "Key") ||
!t->GetBytes(&iv, "IV") ||
!t->GetBytes(&pt, "PT") ||
!t->GetBytes(&aad, "AAD") ||
key.size() * 8 != strtoul(key_len_str.c_str(), nullptr, 0) ||
iv.size() * 8 != strtoul(iv_len_str.c_str(), nullptr, 0) ||
pt.size() * 8 != strtoul(pt_len_str.c_str(), nullptr, 0) ||
aad.size() * 8 != strtoul(aad_len_str.c_str(), nullptr, 0) ||
iv.size() != 12) {
return false;
}
const size_t tag_len = strtoul(tag_len_str.c_str(), nullptr, 0) / 8;
if (!AEADEncrypt(ctx->aead, &ct, &tag, tag_len, key, pt, aad, iv)) {
return false;
}
printf("%s", t->CurrentTestToString().c_str());
printf("CT = %s\r\n", EncodeHex(ct.data(), ct.size()).c_str());
printf("Tag = %s\r\n\r\n", EncodeHex(tag.data(), tag.size()).c_str());
return true;
}
static bool TestAEADDecrypt(FileTest *t, void *arg) {
TestCtx *ctx = reinterpret_cast<TestCtx *>(arg);
std::string key_len, iv_len, pt_len_str, aad_len_str, tag_len;
if (!t->GetInstruction(&key_len, "Keylen") ||
!t->GetInstruction(&iv_len, "IVlen") ||
!t->GetInstruction(&pt_len_str, "PTlen") ||
!t->GetInstruction(&aad_len_str, "AADlen") ||
!t->GetInstruction(&tag_len, "Taglen")) {
t->PrintLine("Invalid instruction block.");
return false;
}
size_t aad_len = strtoul(aad_len_str.c_str(), nullptr, 0) / 8;
size_t pt_len = strtoul(pt_len_str.c_str(), nullptr, 0) / 8;
std::string count;
std::vector<uint8_t> key, iv, ct, aad, tag, pt;
if (!t->GetAttribute(&count, "Count") ||
!t->GetBytes(&key, "Key") ||
!t->GetBytes(&aad, "AAD") ||
!t->GetBytes(&tag, "Tag") ||
!t->GetBytes(&iv, "IV") ||
!t->GetBytes(&ct, "CT") ||
key.size() * 8 != strtoul(key_len.c_str(), nullptr, 0) ||
iv.size() * 8 != strtoul(iv_len.c_str(), nullptr, 0) ||
ct.size() != pt_len ||
aad.size() != aad_len ||
tag.size() * 8 != strtoul(tag_len.c_str(), nullptr, 0)) {
t->PrintLine("Invalid test case");
return false;
}
printf("%s", t->CurrentTestToString().c_str());
bool aead_result =
AEADDecrypt(ctx->aead, &pt, pt_len, key, aad, ct, tag, iv);
if (aead_result) {
printf("PT = %s\r\n\r\n", EncodeHex(pt.data(), pt.size()).c_str());
} else {
printf("FAIL\r\n\r\n");
}
return true;
}
static int usage(char *arg) {
fprintf(stderr, "usage: %s (enc|dec) <cipher> <test file>\n", arg);
return 1;
}
int cavp_aes_gcm_test_main(int argc, char **argv) {
if (argc != 4) {
return usage(argv[0]);
}
const std::string mode(argv[1]);
bool (*test_fn)(FileTest * t, void *arg);
if (mode == "enc") {
test_fn = &TestAEADEncrypt;
} else if (mode == "dec") {
test_fn = &TestAEADDecrypt;
} else {
return usage(argv[0]);
}
const EVP_AEAD *aead = GetAEAD(argv[2], mode == "enc");
if (aead == nullptr) {
fprintf(stderr, "invalid aead: %s\n", argv[2]);
return 1;
}
TestCtx ctx = {aead};
FileTest::Options opts;
opts.path = argv[3];
opts.callback = test_fn;
opts.arg = &ctx;
opts.silent = true;
opts.comment_callback = EchoComment;
return FileTestMain(opts);
}
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