/* 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); }); }