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
|
/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmSHA1.h"
#include "gdcmSystem.h"
#ifdef GDCM_USE_SYSTEM_OPENSSL
#include <openssl/sha.h>
#endif
#include <string.h> // memcmp
#include <stdlib.h> // malloc
#include <stdio.h> // sprintf
/*
*/
namespace gdcm
{
class SHA1Internals
{
public:
#ifdef GDCM_USE_SYSTEM_OPENSSL
SHA_CTX ctx;
#endif
};
SHA1::SHA1()
{
Internals = new SHA1Internals;
}
SHA1::~SHA1()
{
delete Internals;
}
bool SHA1::Compute(const char *buffer, unsigned long buf_len, char digest[])
{
#ifdef GDCM_USE_SYSTEM_OPENSSL
if( !buffer || !buf_len )
{
return false;
}
unsigned char output[20];
SHA_CTX ctx;
SHA1_Init(&ctx);
SHA1_Update(&ctx, buffer, buf_len);
SHA1_Final(output, &ctx);
for (int di = 0; di < 20; ++di)
{
sprintf(digest+2*di, "%02x", output[di]);
}
digest[2*20] = '\0';
return true;
#else
(void)buffer;
(void)buf_len;
(void)digest;
return false;
#endif
}
#ifdef GDCM_USE_SYSTEM_OPENSSL
static bool process_file(const char *filename, unsigned char *digest)
{
if( !filename || !digest ) return false;
FILE *file = fopen(filename, "rb");
if(!file)
{
return false;
}
size_t file_size = System::FileSize(filename);
void *buffer = malloc(file_size);
if(!buffer)
{
fclose(file);
return false;
}
size_t read = fread(buffer, 1, file_size, file);
if( read != file_size ) return false;
SHA_CTX ctx;
int ret = SHA1_Init(&ctx);
if( !ret ) return false;
ret = SHA1_Update(&ctx, buffer, file_size);
if( !ret ) return false;
ret = SHA1_Final(digest, &ctx);
if( !ret ) return false;
/*printf("MD5 (\"%s\") = ", test[i]); */
/*for (int di = 0; di < 16; ++di)
{
printf("%02x", digest[di]);
}*/
//printf("\t%s\n", filename);
free(buffer);
fclose(file);
return true;
}
#endif
bool SHA1::ComputeFile(const char *filename, char digest_str[20*2+1])
{
#ifdef GDCM_USE_SYSTEM_OPENSSL
// If not file exist
// return false;
unsigned char digest[20];
/* Do the file */
if( !process_file(filename, digest) )
{
return false;
}
for (int di = 0; di < 20; ++di)
{
sprintf(digest_str+2*di, "%02x", digest[di]);
}
digest_str[2*20] = '\0';
return true;
#else
(void)filename;
(void)digest_str;
return false;
#endif
}
} // end namespace gdcm
|
