llvm/unittests/Support/raw_sha1_ostream_test.cpp

   1 //===- llvm/unittest/Support/raw_ostream_test.cpp - raw_ostream tests -----===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Support/Format.h"
  10 #include "llvm/Support/raw_sha1_ostream.h"
  11 #include "gtest/gtest.h"
  12
  13 #include <string>
  14
  15 using namespace llvm;
  16
  17 static std::string toHex(ArrayRef<uint8_t> Input) {
  18   static const char *const LUT = "0123456789ABCDEF";
  19   size_t Length = Input.size();
  20
  21   std::string Output;
  22   Output.reserve(2 * Length);
  23   for (size_t i = 0; i < Length; ++i) {
  24     const unsigned char c = Input[i];
  25     Output.push_back(LUT[c >> 4]);
  26     Output.push_back(LUT[c & 15]);
  27   }
  28   return Output;
  29 }
  30
  31 TEST(raw_sha1_ostreamTest, Basic) {
  32   llvm::raw_sha1_ostream Sha1Stream;
  33   Sha1Stream << "Hello World!";
  34   auto Hash = toHex(Sha1Stream.sha1());
  35
  36   ASSERT_EQ("2EF7BDE608CE5404E97D5F042F95F89F1C232871", Hash);
  37 }
  38
  39 TEST(sha1_hash_test, Basic) {
  40   ArrayRef<uint8_t> Input((const uint8_t *)"Hello World!", 12);
  41   std::array<uint8_t, 20> Vec = SHA1::hash(Input);
  42   std::string Hash = toHex(Vec);
  43   ASSERT_EQ("2EF7BDE608CE5404E97D5F042F95F89F1C232871", Hash);
  44 }
  45
  46 TEST(sha1_hash_test, Update) {
  47   SHA1 sha1;
  48   std::string Input = "123456789012345678901234567890";
  49   ASSERT_EQ(Input.size(), 30UL);
  50   // 3 short updates.
  51   sha1.update(Input);
  52   sha1.update(Input);
  53   sha1.update(Input);
  54   // Long update that gets into the optimized loop with prefix/suffix.
  55   sha1.update(Input + Input + Input + Input);
  56   // 18 bytes buffered now.
  57
  58   std::string Hash = toHex(sha1.final());
  59   ASSERT_EQ("3E4A614101AD84985AB0FE54DC12A6D71551E5AE", Hash);
  60 }
  61
  62 // Check that getting the intermediate hash in the middle of the stream does
  63 // not invalidate the final result.
  64 TEST(raw_sha1_ostreamTest, Intermediate) {
  65   llvm::raw_sha1_ostream Sha1Stream;
  66   Sha1Stream << "Hello";
  67   auto Hash = toHex(Sha1Stream.sha1());
  68
  69   ASSERT_EQ("F7FF9E8B7BB2E09B70935A5D785E0CC5D9D0ABF0", Hash);
  70   Sha1Stream << " World!";
  71   Hash = toHex(Sha1Stream.sha1());
  72
  73   // Compute the non-split hash separately as a reference.
  74   llvm::raw_sha1_ostream NonSplitSha1Stream;
  75   NonSplitSha1Stream << "Hello World!";
  76   auto NonSplitHash = toHex(NonSplitSha1Stream.sha1());
  77
  78   ASSERT_EQ(NonSplitHash, Hash);
  79 }
  80
  81 TEST(raw_sha1_ostreamTest, Reset) {
  82   llvm::raw_sha1_ostream Sha1Stream;
  83   Sha1Stream << "Hello";
  84   auto Hash = toHex(Sha1Stream.sha1());
  85
  86   ASSERT_EQ("F7FF9E8B7BB2E09B70935A5D785E0CC5D9D0ABF0", Hash);
  87
  88   Sha1Stream.resetHash();
  89   Sha1Stream << " World!";
  90   Hash = toHex(Sha1Stream.sha1());
  91
  92   ASSERT_EQ("7447F2A5A42185C8CF91E632789C431830B59067", Hash);
  93 }