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// Copyright Epic Games, Inc. All Rights Reserved.
#include <zencore/blake3.h>
#include <zencore/compositebuffer.h>
#include <zencore/filesystem.h>
#include <zencore/string.h>
#include <zencore/testing.h>
#include <zencore/zencore.h>
#include <string.h>
#include "blake3.h"
//////////////////////////////////////////////////////////////////////////
namespace zen {
void
blake3_forcelink()
{
}
BLAKE3 BLAKE3::Zero; // Initialized to all zeroes
BLAKE3
BLAKE3::HashMemory(const void* data, size_t byteCount)
{
BLAKE3 b3;
blake3_hasher b3h;
blake3_hasher_init(&b3h);
blake3_hasher_update(&b3h, data, byteCount);
blake3_hasher_finalize(&b3h, b3.Hash, sizeof b3.Hash);
return b3;
}
BLAKE3
BLAKE3::HashBuffer(const CompositeBuffer& Buffer)
{
BLAKE3 Hash;
blake3_hasher Hasher;
blake3_hasher_init(&Hasher);
for (const SharedBuffer& Segment : Buffer.GetSegments())
{
size_t SegmentSize = Segment.GetSize();
static const uint64_t BufferingSize = 256u * 1024u;
IoBufferFileReference FileRef;
if (SegmentSize >= (BufferingSize + BufferingSize / 2) && Segment.GetFileReference(FileRef))
{
ScanFile(FileRef.FileHandle,
FileRef.FileChunkOffset,
FileRef.FileChunkSize,
BufferingSize,
[&Hasher](const void* Data, size_t Size) { blake3_hasher_update(&Hasher, Data, Size); });
}
else
{
blake3_hasher_update(&Hasher, Segment.GetData(), SegmentSize);
}
}
blake3_hasher_finalize(&Hasher, Hash.Hash, sizeof Hash.Hash);
return Hash;
}
BLAKE3
BLAKE3::HashBuffer(const IoBuffer& Buffer)
{
BLAKE3 Hash;
blake3_hasher Hasher;
blake3_hasher_init(&Hasher);
size_t BufferSize = Buffer.GetSize();
static const uint64_t BufferingSize = 256u * 1024u;
IoBufferFileReference FileRef;
if (BufferSize >= (BufferingSize + BufferingSize / 2) && Buffer.GetFileReference(FileRef))
{
ScanFile(FileRef.FileHandle,
FileRef.FileChunkOffset,
FileRef.FileChunkSize,
BufferingSize,
[&Hasher](const void* Data, size_t Size) { blake3_hasher_update(&Hasher, Data, Size); });
}
else
{
blake3_hasher_update(&Hasher, Buffer.GetData(), BufferSize);
}
blake3_hasher_finalize(&Hasher, Hash.Hash, sizeof Hash.Hash);
return Hash;
}
BLAKE3
BLAKE3::FromHexString(const char* string)
{
BLAKE3 b3;
ParseHexBytes(string, 2 * sizeof b3.Hash, b3.Hash);
return b3;
}
const char*
BLAKE3::ToHexString(char* outString /* 40 characters + NUL terminator */) const
{
ToHexBytes(Hash, sizeof(BLAKE3), outString);
outString[2 * sizeof(BLAKE3)] = '\0';
return outString;
}
StringBuilderBase&
BLAKE3::ToHexString(StringBuilderBase& outBuilder) const
{
char str[65];
ToHexString(str);
outBuilder.AppendRange(str, &str[65]);
return outBuilder;
}
BLAKE3Stream::BLAKE3Stream()
{
blake3_hasher* b3h = reinterpret_cast<blake3_hasher*>(m_HashState);
static_assert(sizeof(blake3_hasher) <= sizeof(m_HashState));
blake3_hasher_init(b3h);
}
void
BLAKE3Stream::Reset()
{
blake3_hasher* b3h = reinterpret_cast<blake3_hasher*>(m_HashState);
blake3_hasher_init(b3h);
}
BLAKE3Stream&
BLAKE3Stream::Append(const void* data, size_t byteCount)
{
blake3_hasher* b3h = reinterpret_cast<blake3_hasher*>(m_HashState);
blake3_hasher_update(b3h, data, byteCount);
return *this;
}
BLAKE3
BLAKE3Stream::GetHash()
{
BLAKE3 b3;
blake3_hasher* b3h = reinterpret_cast<blake3_hasher*>(m_HashState);
blake3_hasher_finalize(b3h, b3.Hash, sizeof b3.Hash);
return b3;
}
//////////////////////////////////////////////////////////////////////////
//
// Testing related code follows...
//
#if ZEN_WITH_TESTS
// doctest::String
// toString(const BLAKE3& value)
// {
// char text[2 * sizeof(BLAKE3) + 1];
// value.ToHexString(text);
// return text;
// }
TEST_CASE("BLAKE3")
{
SUBCASE("Basics")
{
BLAKE3 b3 = BLAKE3::HashMemory(nullptr, 0);
CHECK(BLAKE3::FromHexString("af1349b9f5f9a1a6a0404dea36dcc9499bcb25c9adc112b7cc9a93cae41f3262") == b3);
BLAKE3::String_t b3s;
std::string b3ss = b3.ToHexString(b3s);
CHECK(b3ss == "af1349b9f5f9a1a6a0404dea36dcc9499bcb25c9adc112b7cc9a93cae41f3262");
}
SUBCASE("hashes")
{
CHECK(BLAKE3::FromHexString("00307ced6a8b278d5e3a9f77b138d0e9d2209717c9d45b205f427a73565cc5fb") == BLAKE3::HashMemory("abc123", 6));
CHECK(BLAKE3::FromHexString("a7142c8c3905cd11b1e35105c7ac588b75d6798822f71e1145187ad46f3e8df4") ==
BLAKE3::HashMemory("1234567890123456789012345678901234567890", 40));
CHECK(BLAKE3::FromHexString("70e708532559265c4662d0285e5e0a4be8bd972bd1f255a93ddf342243adc427") ==
BLAKE3::HashMemory("The HttpSendHttpResponse function sends an HTTP response to the specified HTTP request.", 87));
}
SUBCASE("streamHashes")
{
auto streamHash = [](const void* data, size_t dataBytes) -> BLAKE3 {
BLAKE3Stream b3s;
b3s.Append(data, dataBytes);
return b3s.GetHash();
};
CHECK(BLAKE3::FromHexString("00307ced6a8b278d5e3a9f77b138d0e9d2209717c9d45b205f427a73565cc5fb") == streamHash("abc123", 6));
CHECK(BLAKE3::FromHexString("a7142c8c3905cd11b1e35105c7ac588b75d6798822f71e1145187ad46f3e8df4") ==
streamHash("1234567890123456789012345678901234567890", 40));
CHECK(BLAKE3::FromHexString("70e708532559265c4662d0285e5e0a4be8bd972bd1f255a93ddf342243adc427") ==
streamHash("The HttpSendHttpResponse function sends an HTTP response to the specified HTTP request.", 87));
}
}
#endif
} // namespace zen
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