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
|
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: hashes.cc,v 1.1 2001/03/06 07:15:29 jgg Exp $
/* ######################################################################
Hashes - Simple wrapper around the hash functions
This is just used to make building the methods simpler, this is the
only interface required..
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/hashes.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/macros.h>
#include <unistd.h>
#include <string>
#include <iostream>
/*}}}*/
const char* HashString::_SupportedHashes[] =
{
"SHA512", "SHA256", "SHA1", "MD5Sum", NULL
};
HashString::HashString()
{
}
HashString::HashString(string Type, string Hash) : Type(Type), Hash(Hash)
{
}
HashString::HashString(string StringedHash) /*{{{*/
{
// legacy: md5sum without "MD5Sum:" prefix
if (StringedHash.find(":") == string::npos && StringedHash.size() == 32)
{
Type = "MD5Sum";
Hash = StringedHash;
return;
}
string::size_type pos = StringedHash.find(":");
Type = StringedHash.substr(0,pos);
Hash = StringedHash.substr(pos+1, StringedHash.size() - pos);
if(_config->FindB("Debug::Hashes",false) == true)
std::clog << "HashString(string): " << Type << " : " << Hash << std::endl;
}
/*}}}*/
bool HashString::VerifyFile(string filename) const /*{{{*/
{
FileFd fd;
MD5Summation MD5;
SHA1Summation SHA1;
SHA256Summation SHA256;
SHA256Summation SHA512;
string fileHash;
FileFd Fd(filename, FileFd::ReadOnly);
if(Type == "MD5Sum")
{
MD5.AddFD(Fd.Fd(), Fd.Size());
fileHash = (string)MD5.Result();
}
else if (Type == "SHA1")
{
SHA1.AddFD(Fd.Fd(), Fd.Size());
fileHash = (string)SHA1.Result();
}
else if (Type == "SHA256")
{
SHA256.AddFD(Fd.Fd(), Fd.Size());
fileHash = (string)SHA256.Result();
}
else if (Type == "SHA512")
{
SHA512.AddFD(Fd.Fd(), Fd.Size());
fileHash = (string)SHA512.Result();
}
Fd.Close();
if(_config->FindB("Debug::Hashes",false) == true)
std::clog << "HashString::VerifyFile: got: " << fileHash << " expected: " << toStr() << std::endl;
return (fileHash == Hash);
}
/*}}}*/
const char** HashString::SupportedHashes()
{
return _SupportedHashes;
}
bool HashString::empty() const
{
return (Type.empty() || Hash.empty());
}
string HashString::toStr() const
{
return Type+string(":")+Hash;
}
// Hashes::AddFD - Add the contents of the FD /*{{{*/
// ---------------------------------------------------------------------
/* */
bool Hashes::AddFD(int Fd,unsigned long Size)
{
unsigned char Buf[64*64];
int Res = 0;
int ToEOF = (Size == 0);
while (Size != 0 || ToEOF)
{
unsigned n = sizeof(Buf);
if (!ToEOF) n = min(Size,(unsigned long)n);
Res = read(Fd,Buf,n);
if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
return false;
if (ToEOF && Res == 0) // EOF
break;
Size -= Res;
MD5.Add(Buf,Res);
SHA1.Add(Buf,Res);
SHA256.Add(Buf,Res);
SHA512.Add(Buf,Res);
}
return true;
}
/*}}}*/
|
