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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <array>
#include <span>
#include <wtf/text/CString.h>
#if PLATFORM(COCOA)
#include <CommonCrypto/CommonDigest.h>
#endif
#ifdef __OBJC__
#include <objc/objc.h>
#endif
#if USE(CF)
typedef const struct __CFString * CFStringRef;
#endif
// On Cocoa platforms, CoreUtils.h has a SHA1() macro that sometimes get included above here.
#ifdef SHA1
#undef SHA1
#endif
namespace WTF {
class SHA1 {
WTF_MAKE_FAST_ALLOCATED;
public:
WTF_EXPORT_PRIVATE SHA1();
WTF_EXPORT_PRIVATE void addBytes(std::span<const std::byte>);
void addBytes(std::span<const uint8_t> input)
{
addBytes(std::as_bytes(input));
}
void addBytes(const CString& input)
{
addBytes(std::as_bytes(input.span()));
}
WTF_EXPORT_PRIVATE void addUTF8Bytes(StringView);
#if USE(CF)
WTF_EXPORT_PRIVATE void addUTF8Bytes(CFStringRef);
#ifdef __OBJC__
void addUTF8Bytes(NSString *string) { addUTF8Bytes((__bridge CFStringRef)string); }
#endif
#endif
// Size of the SHA1 hash
WTF_EXPORT_PRIVATE static constexpr size_t hashSize = 20;
// type for computing SHA1 hash
typedef std::array<uint8_t, hashSize> Digest;
WTF_EXPORT_PRIVATE void computeHash(Digest&);
// Get a hex hash from the digest.
WTF_EXPORT_PRIVATE static CString hexDigest(const Digest&);
// Compute the hex digest directly.
WTF_EXPORT_PRIVATE CString computeHexDigest();
private:
#if PLATFORM(COCOA)
CC_SHA1_CTX m_context;
#else
void finalize();
void processBlock();
void reset();
std::array<uint8_t, 64> m_buffer;
size_t m_cursor; // Number of bytes filled in m_buffer (0-64).
uint64_t m_totalBytes; // Number of bytes added so far.
std::array<uint32_t, 5> m_hash;
#endif
};
} // namespace WTF
using WTF::SHA1;
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