/usr/include/libpar2/md5.h is in libpar2-dev 0.4-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | // This file is part of par2cmdline (a PAR 2.0 compatible file verification and
// repair tool). See http://parchive.sourceforge.net for details of PAR 2.0.
//
// Copyright (c) 2003 Peter Brian Clements
//
// par2cmdline is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// par2cmdline is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#ifndef __MD5_H__
#define __MD5_H__
#ifdef WIN32
#pragma pack(push, 1)
#define PACKED
#else
#define PACKED __attribute__ ((packed))
#endif
// This file defines the MD5Hash and MD5Context objects which are used
// to compute and manipulate the MD5 Hash values for a block of data.
// Usage:
//
// MD5Context context;
// context.Update(buffer, length);
//
// MD5Hash hash;
// context.Final(hash);
// MD5 Hash value
struct MD5Hash;
ostream& operator<<(ostream &s, const MD5Hash &hash);
struct MD5Hash
{
// Comparison operators
bool operator==(const MD5Hash &other) const;
bool operator!=(const MD5Hash &other) const;
bool operator<(const MD5Hash &other) const;
bool operator>=(const MD5Hash &other) const;
bool operator>(const MD5Hash &other) const;
bool operator<=(const MD5Hash &other) const;
// Convert value to hex
friend ostream& operator<<(ostream &s, const MD5Hash &hash);
string print(void) const;
u8 hash[16]; // 16 byte MD5 Hash value
} PACKED;
// Intermediate computation state
class MD5State
{
public:
MD5State(void);
void Reset(void);
public:
void UpdateState(const u32 (&block)[16]);
protected:
u32 state[4]; // 16 byte MD5 computation state
};
// MD5 computation context with 64 byte buffer
class MD5Context : public MD5State
{
public:
MD5Context(void);
~MD5Context(void) {};
void Reset(void);
// Process data from a buffer
void Update(const void *buffer, size_t length);
// Process 0 bytes
void Update(size_t length);
// Compute the final hash value
void Final(MD5Hash &output);
// Get the Hash value and the total number of bytes processed.
MD5Hash Hash(void) const;
u64 Bytes(void) const {return bytes;}
friend ostream& operator<<(ostream &s, const MD5Context &context);
string print(void) const;
protected:
enum {buffersize = 64};
unsigned char block[buffersize];
size_t used;
u64 bytes;
};
// Compare hash values
inline bool MD5Hash::operator==(const MD5Hash &other) const
{
return (0==memcmp(&hash, &other.hash, sizeof(hash)));
}
inline bool MD5Hash::operator!=(const MD5Hash &other) const
{
return !operator==(other);
}
inline bool MD5Hash::operator<(const MD5Hash &other) const
{
size_t index = 15;
while (index > 0 && hash[index] == other.hash[index])
{
index--;
}
return hash[index] < other.hash[index];
}
inline bool MD5Hash::operator>=(const MD5Hash &other) const
{
return !operator<(other);
}
inline bool MD5Hash::operator>(const MD5Hash &other) const
{
return other.operator<(*this);
}
inline bool MD5Hash::operator<=(const MD5Hash &other) const
{
return !other.operator<(*this);
}
#ifdef WIN32
#pragma pack(pop)
#endif
#undef PACKED
#endif // __MD5_H__
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