80 lines · cpp
1//===- llvm/unittest/Support/SHA256Test.cpp - SHA256 tests2//----------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9//10// This file implements unit tests for the SHA256 functions.11//12//===----------------------------------------------------------------------===//13 14#include "llvm/Support/SHA256.h"15#include "llvm/ADT/ArrayRef.h"16#include "gtest/gtest.h"17 18using namespace llvm;19 20namespace {21 22static std::string toHex(ArrayRef<uint8_t> Input) {23 static const char *const LUT = "0123456789abcdef";24 size_t Length = Input.size();25 26 std::string Output;27 Output.reserve(2 * Length);28 for (size_t i = 0; i < Length; ++i) {29 const unsigned char c = Input[i];30 Output.push_back(LUT[c >> 4]);31 Output.push_back(LUT[c & 15]);32 }33 return Output;34}35 36/// Tests an arbitrary set of bytes passed as \p Input.37void TestSHA256Sum(ArrayRef<uint8_t> Input, StringRef Final) {38 SHA256 Hash;39 Hash.update(Input);40 auto hash = Hash.final();41 auto hashStr = toHex(hash);42 EXPECT_EQ(hashStr, Final);43}44 45using KV = std::pair<const char *, const char *>;46 47TEST(SHA256Test, SHA256) {48 std::array<KV, 5> testvectors{49 KV{"",50 "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},51 KV{"a",52 "ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb"},53 KV{"abc",54 "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad"},55 KV{"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",56 "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1"},57 KV{"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklm"58 "nopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",59 "cf5b16a778af8380036ce59e7b0492370b249b11e8f07a51afac45037afee9d1"}};60 61 for (auto input_expected : testvectors) {62 auto str = std::get<0>(input_expected);63 auto expected = std::get<1>(input_expected);64 TestSHA256Sum({reinterpret_cast<const uint8_t *>(str), strlen(str)},65 expected);66 }67 68 std::string rep(1000, 'a');69 SHA256 Hash;70 for (int i = 0; i < 1000; ++i) {71 Hash.update({reinterpret_cast<const uint8_t *>(rep.data()), rep.size()});72 }73 auto hash = Hash.final();74 auto hashStr = toHex(hash);75 EXPECT_EQ(hashStr,76 "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0");77}78 79} // namespace80