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/*
* This code is derived from (original license follows):
*
* This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
* MD5 Message-Digest Algorithm (RFC 1321).
*
* Homepage:
* http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
*
* Author:
* Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
*
* This software was written by Alexander Peslyak in 2001. No copyright is
* claimed, and the software is hereby placed in the public domain.
* In case this attempt to disclaim copyright and place the software in the
* public domain is deemed null and void, then the software is
* Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
* general public under the following terms:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted.
*
* There's ABSOLUTELY NO WARRANTY, express or implied.
*
* See md5.c for more information.
*/
#ifndef LLVM_SUPPORT_MD5_H
#define LLVM_SUPPORT_MD5_H
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Endian.h"
namespace llvm {
template <typename T> class ArrayRef;
class MD5 {
// Any 32-bit or wider unsigned integer data type will do.
typedef uint32_t MD5_u32plus;
MD5_u32plus a, b, c, d;
MD5_u32plus hi, lo;
uint8_t buffer[64];
MD5_u32plus block[16];
public:
typedef uint8_t MD5Result[16];
MD5();
/// \brief Updates the hash for the byte stream provided.
void update(ArrayRef<uint8_t> Data);
/// \brief Updates the hash for the StringRef provided.
void update(StringRef Str);
/// \brief Finishes off the hash and puts the result in result.
void final(MD5Result &Result);
/// \brief Translates the bytes in \p Res to a hex string that is
/// deposited into \p Str. The result will be of length 32.
static void stringifyResult(MD5Result &Result, SmallString<32> &Str);
private:
const uint8_t *body(ArrayRef<uint8_t> Data);
};
/// Helper to compute and return lower 64 bits of the given string's MD5 hash.
inline uint64_t MD5Hash(StringRef Str) {
MD5 Hash;
Hash.update(Str);
llvm::MD5::MD5Result Result;
Hash.final(Result);
// Return the least significant 8 bytes. Our MD5 implementation returns the
// result in little endian, so we may need to swap bytes.
using namespace llvm::support;
return endian::read<uint64_t, little, unaligned>(Result);
}
}
#endif
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