LLVM 20.0.0git
MD5.h
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1/* -*- C++ -*-
2 * This code is derived from (original license follows):
3 *
4 * This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
5 * MD5 Message-Digest Algorithm (RFC 1321).
6 *
7 * Homepage:
8 * http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
9 *
10 * Author:
11 * Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
12 *
13 * This software was written by Alexander Peslyak in 2001. No copyright is
14 * claimed, and the software is hereby placed in the public domain.
15 * In case this attempt to disclaim copyright and place the software in the
16 * public domain is deemed null and void, then the software is
17 * Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
18 * general public under the following terms:
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted.
22 *
23 * There's ABSOLUTELY NO WARRANTY, express or implied.
24 *
25 * See md5.c for more information.
26 */
27
28#ifndef LLVM_SUPPORT_MD5_H
29#define LLVM_SUPPORT_MD5_H
30
31#include "llvm/ADT/StringRef.h"
32#include "llvm/Support/Endian.h"
33#include <array>
34#include <cstdint>
35
36namespace llvm {
37
38template <unsigned N> class SmallString;
39template <typename T> class ArrayRef;
40
41class MD5 {
42public:
43 struct MD5Result : public std::array<uint8_t, 16> {
44 SmallString<32> digest() const;
45
46 uint64_t low() const {
47 // Our MD5 implementation returns the result in little endian, so the low
48 // word is first.
49 using namespace support;
50 return endian::read<uint64_t, llvm::endianness::little>(data());
51 }
52
53 uint64_t high() const {
54 using namespace support;
55 return endian::read<uint64_t, llvm::endianness::little>(data() + 8);
56 }
57 std::pair<uint64_t, uint64_t> words() const {
58 using namespace support;
59 return std::make_pair(high(), low());
60 }
61 };
62
63 MD5();
64
65 /// Updates the hash for the byte stream provided.
67
68 /// Updates the hash for the StringRef provided.
69 void update(StringRef Str);
70
71 /// Finishes off the hash and puts the result in result.
72 void final(MD5Result &Result);
73
74 /// Finishes off the hash, and returns the 16-byte hash data.
75 MD5Result final();
76
77 /// Finishes off the hash, and returns the 16-byte hash data.
78 /// This is suitable for getting the MD5 at any time without invalidating the
79 /// internal state, so that more calls can be made into `update`.
81
82 /// Translates the bytes in \p Res to a hex string that is
83 /// deposited into \p Str. The result will be of length 32.
84 static void stringifyResult(MD5Result &Result, SmallVectorImpl<char> &Str);
85
86 /// Computes the hash for a given bytes.
88
89private:
90 // Any 32-bit or wider unsigned integer data type will do.
91 typedef uint32_t MD5_u32plus;
92
93 // Internal State
94 struct {
95 MD5_u32plus a = 0x67452301;
96 MD5_u32plus b = 0xefcdab89;
97 MD5_u32plus c = 0x98badcfe;
98 MD5_u32plus d = 0x10325476;
101 uint8_t buffer[64];
103 } InternalState;
104
105 const uint8_t *body(ArrayRef<uint8_t> Data);
106};
107
108/// Helper to compute and return lower 64 bits of the given string's MD5 hash.
110 using namespace support;
111
112 MD5 Hash;
113 Hash.update(Str);
114 MD5::MD5Result Result;
115 Hash.final(Result);
116 // Return the least significant word.
117 return Result.low();
118}
119
120} // end namespace llvm
121
122#endif // LLVM_SUPPORT_MD5_H
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: ArrayRef.h:41
Definition: MD5.h:41
MD5_u32plus block[16]
Definition: MD5.h:102
MD5_u32plus a
Definition: MD5.h:95
void update(ArrayRef< uint8_t > Data)
Updates the hash for the byte stream provided.
Definition: MD5.cpp:189
static void stringifyResult(MD5Result &Result, SmallVectorImpl< char > &Str)
Translates the bytes in Res to a hex string that is deposited into Str.
Definition: MD5.cpp:287
void final(MD5Result &Result)
Finishes off the hash and puts the result in result.
Definition: MD5.cpp:234
MD5_u32plus hi
Definition: MD5.h:99
MD5Result result()
Finishes off the hash, and returns the 16-byte hash data.
Definition: MD5.cpp:270
static MD5Result hash(ArrayRef< uint8_t > Data)
Computes the hash for a given bytes.
Definition: MD5.cpp:291
uint8_t buffer[64]
Definition: MD5.h:101
MD5_u32plus lo
Definition: MD5.h:100
MD5_u32plus b
Definition: MD5.h:96
MD5_u32plus d
Definition: MD5.h:98
MD5_u32plus c
Definition: MD5.h:97
SmallString - A SmallString is just a SmallVector with methods and accessors that make it work better...
Definition: SmallString.h:26
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: SmallVector.h:586
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
uint64_t MD5Hash(const FunctionId &Obj)
Definition: FunctionId.h:167
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
ArrayRef(const T &OneElt) -> ArrayRef< T >
SmallString< 32 > digest() const
Definition: MD5.cpp:281
uint64_t low() const
Definition: MD5.h:46
uint64_t high() const
Definition: MD5.h:53
std::pair< uint64_t, uint64_t > words() const
Definition: MD5.h:57