1 /* Copyright (c) 2015, Google Inc. 2 * 3 * Permission to use, copy, modify, and/or distribute this software for any 4 * purpose with or without fee is hereby granted, provided that the above 5 * copyright notice and this permission notice appear in all copies. 6 * 7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 14 15 #include <stdio.h> 16 #include <string.h> 17 18 #include <vector> 19 20 #include <gtest/gtest.h> 21 22 #include <openssl/poly1305.h> 23 24 #include "../internal.h" 25 #include "../test/file_test.h" 26 #include "../test/test_util.h" 27 28 29 static void TestSIMD(unsigned excess, const std::vector<uint8_t> &key, 30 const std::vector<uint8_t> &in, 31 const std::vector<uint8_t> &mac) { 32 poly1305_state state; 33 CRYPTO_poly1305_init(&state, key.data()); 34 35 size_t done = 0; 36 37 // Feed 16 bytes in. Some implementations begin in non-SIMD mode and upgrade 38 // on-demand. Stress the upgrade path. 39 size_t todo = 16; 40 if (todo > in.size()) { 41 todo = in.size(); 42 } 43 CRYPTO_poly1305_update(&state, in.data(), todo); 44 done += todo; 45 46 for (;;) { 47 // Feed 128 + |excess| bytes to test SIMD mode. 48 if (done + 128 + excess > in.size()) { 49 break; 50 } 51 CRYPTO_poly1305_update(&state, in.data() + done, 128 + excess); 52 done += 128 + excess; 53 54 // Feed |excess| bytes to ensure SIMD mode can handle short inputs. 55 if (done + excess > in.size()) { 56 break; 57 } 58 CRYPTO_poly1305_update(&state, in.data() + done, excess); 59 done += excess; 60 } 61 62 // Consume the remainder and finish. 63 CRYPTO_poly1305_update(&state, in.data() + done, in.size() - done); 64 65 // |CRYPTO_poly1305_finish| requires a 16-byte-aligned output. 66 alignas(16) uint8_t out[16]; 67 CRYPTO_poly1305_finish(&state, out); 68 EXPECT_EQ(Bytes(out), Bytes(mac)) << "SIMD pattern " << excess << " failed."; 69 } 70 71 TEST(Poly1305Test, TestVectors) { 72 FileTestGTest("crypto/poly1305/poly1305_tests.txt", [](FileTest *t) { 73 std::vector<uint8_t> key, in, mac; 74 ASSERT_TRUE(t->GetBytes(&key, "Key")); 75 ASSERT_TRUE(t->GetBytes(&in, "Input")); 76 ASSERT_TRUE(t->GetBytes(&mac, "MAC")); 77 ASSERT_EQ(32u, key.size()); 78 ASSERT_EQ(16u, mac.size()); 79 80 // Test single-shot operation. 81 poly1305_state state; 82 CRYPTO_poly1305_init(&state, key.data()); 83 CRYPTO_poly1305_update(&state, in.data(), in.size()); 84 // |CRYPTO_poly1305_finish| requires a 16-byte-aligned output. 85 alignas(16) uint8_t out[16]; 86 CRYPTO_poly1305_finish(&state, out); 87 EXPECT_EQ(Bytes(out), Bytes(mac)) << "Single-shot Poly1305 failed."; 88 89 // Test streaming byte-by-byte. 90 CRYPTO_poly1305_init(&state, key.data()); 91 for (size_t i = 0; i < in.size(); i++) { 92 CRYPTO_poly1305_update(&state, &in[i], 1); 93 } 94 CRYPTO_poly1305_finish(&state, out); 95 EXPECT_EQ(Bytes(out), Bytes(mac)) << "Streaming Poly1305 failed."; 96 97 // Test SIMD stress patterns. OpenSSL's AVX2 assembly needs a multiple of 98 // four blocks, so test up to three blocks of excess. 99 TestSIMD(0, key, in, mac); 100 TestSIMD(16, key, in, mac); 101 TestSIMD(32, key, in, mac); 102 TestSIMD(48, key, in, mac); 103 }); 104 } 105
