blob: 0be2918eee243e8e35c57725eeb5a7f8b7f51494 (
plain)
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
|
/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#ifndef cmCryptoHash_h
#define cmCryptoHash_h
#include <cmConfigure.h>
#include <cm_auto_ptr.hxx>
#include <string>
#include <vector>
/**
* @brief Abstract base class for cryptographic hash generators
*/
class cmCryptoHash
{
public:
virtual ~cmCryptoHash() {}
/// @brief Returns a new hash generator of the requested type
/// @arg algo Hash type name. Supported hash types are
/// MD5, SHA1, SHA224, SHA256, SHA384, SHA512
/// @return A valid auto pointer if algo is supported or
/// an invalid/NULL pointer otherwise
static CM_AUTO_PTR<cmCryptoHash> New(const char* algo);
/// @brief Converts a hex character to its binary value (4 bits)
/// @arg input Hex character [0-9a-fA-F].
/// @arg output Binary value of the input character (4 bits)
/// @return True if input was a valid hex character
static bool IntFromHexDigit(char input, char& output);
/// @brief Converts a byte hash to a sequence of hex character pairs
static std::string ByteHashToString(const std::vector<unsigned char>& hash);
/// @brief Calculates a binary hash from string input data
/// @return Binary hash vector
std::vector<unsigned char> ByteHashString(const std::string& input);
/// @brief Calculates a binary hash from file content
/// @see ByteHashString()
/// @return Non empty binary hash vector if the file was read successfully.
/// An empty vector otherwise.
std::vector<unsigned char> ByteHashFile(const std::string& file);
/// @brief Calculates a hash string from string input data
/// @return Sequence of hex characters pairs for each byte of the binary hash
std::string HashString(const std::string& input);
/// @brief Calculates a hash string from file content
/// @see HashString()
/// @return Non empty hash string if the file was read successfully.
/// An empty string otherwise.
std::string HashFile(const std::string& file);
protected:
virtual void Initialize() = 0;
virtual void Append(unsigned char const*, int) = 0;
virtual std::vector<unsigned char> Finalize() = 0;
};
class cmCryptoHashMD5 : public cmCryptoHash
{
struct cmsysMD5_s* MD5;
public:
cmCryptoHashMD5();
~cmCryptoHashMD5() CM_OVERRIDE;
protected:
void Initialize() CM_OVERRIDE;
void Append(unsigned char const* buf, int sz) CM_OVERRIDE;
std::vector<unsigned char> Finalize() CM_OVERRIDE;
};
#define cmCryptoHash_SHA_CLASS_DECL(SHA) \
class cmCryptoHash##SHA : public cmCryptoHash \
{ \
union _SHA_CTX* SHA; \
\
public: \
cmCryptoHash##SHA(); \
~cmCryptoHash##SHA(); \
\
protected: \
virtual void Initialize(); \
virtual void Append(unsigned char const* buf, int sz); \
virtual std::vector<unsigned char> Finalize(); \
}
cmCryptoHash_SHA_CLASS_DECL(SHA1);
cmCryptoHash_SHA_CLASS_DECL(SHA224);
cmCryptoHash_SHA_CLASS_DECL(SHA256);
cmCryptoHash_SHA_CLASS_DECL(SHA384);
cmCryptoHash_SHA_CLASS_DECL(SHA512);
#undef cmCryptoHash_SHA_CLASS_DECL
#endif
|
