LLVM  4.0.0
MD5.h
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1 /*
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/SmallString.h"
32 #include "llvm/Support/DataTypes.h"
33 #include "llvm/Support/Endian.h"
34 #include <array>
35 
36 namespace llvm {
37 template <typename T> class ArrayRef;
38 
39 class MD5 {
40  // Any 32-bit or wider unsigned integer data type will do.
41  typedef uint32_t MD5_u32plus;
42 
43  MD5_u32plus a, b, c, d;
44  MD5_u32plus hi, lo;
45  uint8_t buffer[64];
46  MD5_u32plus block[16];
47 
48 public:
49  typedef uint8_t MD5Result[16];
50 
51  MD5();
52 
53  /// \brief Updates the hash for the byte stream provided.
54  void update(ArrayRef<uint8_t> Data);
55 
56  /// \brief Updates the hash for the StringRef provided.
57  void update(StringRef Str);
58 
59  /// \brief Finishes off the hash and puts the result in result.
60  void final(MD5Result &Result);
61 
62  /// \brief Translates the bytes in \p Res to a hex string that is
63  /// deposited into \p Str. The result will be of length 32.
64  static void stringifyResult(MD5Result &Result, SmallString<32> &Str);
65 
66  /// \brief Computes the hash for a given bytes.
67  static std::array<uint8_t, 16> hash(ArrayRef<uint8_t> Data);
68 
69 private:
70  const uint8_t *body(ArrayRef<uint8_t> Data);
71 };
72 
73 /// Helper to compute and return lower 64 bits of the given string's MD5 hash.
74 inline uint64_t MD5Hash(StringRef Str) {
75  MD5 Hash;
76  Hash.update(Str);
77  llvm::MD5::MD5Result Result;
78  Hash.final(Result);
79  // Return the least significant 8 bytes. Our MD5 implementation returns the
80  // result in little endian, so we may need to swap bytes.
81  using namespace llvm::support;
82  return endian::read<uint64_t, little, unaligned>(Result);
83 }
84 
85 }
86 
87 #endif
uint64_t MD5Hash(StringRef Str)
Helper to compute and return lower 64 bits of the given string's MD5 hash.
Definition: MD5.h:74
void update(ArrayRef< uint8_t > Data)
Updates the hash for the byte stream provided.
Definition: MD5.cpp:187
static void stringifyResult(MD5Result &Result, SmallString< 32 > &Str)
Translates the bytes in Res to a hex string that is deposited into Str.
Definition: MD5.cpp:262
static std::array< uint8_t, 16 > hash(ArrayRef< uint8_t > Data)
Computes the hash for a given bytes.
Definition: MD5.cpp:268
uint8_t MD5Result[16]
Definition: MD5.h:49
void final(MD5Result &Result)
Finishes off the hash and puts the result in result.
Definition: MD5.cpp:232
Definition: MD5.h:39
std::string Hash(const Unit &U)
Definition: FuzzerSHA1.cpp:216
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:47
MD5()
Definition: MD5.cpp:182