/* Copyright (c) 2015, 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 <stdio.h>
#include <string.h>
#include <vector>
#include <gtest/gtest.h>
#include <openssl/poly1305.h>
#include "../internal.h"
#include "../test/file_test.h"
#include "../test/test_util.h"
static void TestSIMD(unsigned excess, const std::vector<uint8_t> &key,
const std::vector<uint8_t> &in,
const std::vector<uint8_t> &mac) {
poly1305_state state;
CRYPTO_poly1305_init(&state, key.data());
size_t done = 0;
// Feed 16 bytes in. Some implementations begin in non-SIMD mode and upgrade
// on-demand. Stress the upgrade path.
size_t todo = 16;
if (todo > in.size()) {
todo = in.size();
}
CRYPTO_poly1305_update(&state, in.data(), todo);
done += todo;
for (;;) {
// Feed 128 + |excess| bytes to test SIMD mode.
if (done + 128 + excess > in.size()) {
break;
}
CRYPTO_poly1305_update(&state, in.data() + done, 128 + excess);
done += 128 + excess;
// Feed |excess| bytes to ensure SIMD mode can handle short inputs.
if (done + excess > in.size()) {
break;
}
CRYPTO_poly1305_update(&state, in.data() + done, excess);
done += excess;
}
// Consume the remainder and finish.
CRYPTO_poly1305_update(&state, in.data() + done, in.size() - done);
// |CRYPTO_poly1305_finish| requires a 16-byte-aligned output.
alignas(16) uint8_t out[16];
CRYPTO_poly1305_finish(&state, out);
EXPECT_EQ(Bytes(out), Bytes(mac)) << "SIMD pattern " << excess << " failed.";
}
TEST(Poly1305Test, TestVectors) {
FileTestGTest("crypto/poly1305/poly1305_tests.txt", [](FileTest *t) {
std::vector<uint8_t> key, in, mac;
ASSERT_TRUE(t->GetBytes(&key, "Key"));
ASSERT_TRUE(t->GetBytes(&in, "Input"));
ASSERT_TRUE(t->GetBytes(&mac, "MAC"));
ASSERT_EQ(32u, key.size());
ASSERT_EQ(16u, mac.size());
// Test single-shot operation.
poly1305_state state;
CRYPTO_poly1305_init(&state, key.data());
CRYPTO_poly1305_update(&state, in.data(), in.size());
// |CRYPTO_poly1305_finish| requires a 16-byte-aligned output.
alignas(16) uint8_t out[16];
CRYPTO_poly1305_finish(&state, out);
EXPECT_EQ(Bytes(out), Bytes(mac)) << "Single-shot Poly1305 failed.";
// Test streaming byte-by-byte.
CRYPTO_poly1305_init(&state, key.data());
for (size_t i = 0; i < in.size(); i++) {
CRYPTO_poly1305_update(&state, &in[i], 1);
}
CRYPTO_poly1305_finish(&state, out);
EXPECT_EQ(Bytes(out), Bytes(mac)) << "Streaming Poly1305 failed.";
// Test SIMD stress patterns. OpenSSL's AVX2 assembly needs a multiple of
// four blocks, so test up to three blocks of excess.
TestSIMD(0, key, in, mac);
TestSIMD(16, key, in, mac);
TestSIMD(32, key, in, mac);
TestSIMD(48, key, in, mac);
});
}