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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
// Copyright (C) 2010 David Sugar, Tycho Softworks.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.
#include "local.h"
Digest::Digest()
{
hashid = 0;
context = NULL;
bufsize = 0;
textbuf[0] = 0;
}
Digest::Digest(const char *type)
{
hashtype = NULL;
context = NULL;
bufsize = 0;
textbuf[0] = 0;
set(type);
}
Digest::~Digest()
{
release();
}
void Digest::release(void)
{
if(context) {
gcry_md_close((MD_CTX)context);
context = NULL;
}
bufsize = 0;
textbuf[0] = 0;
}
void Digest::set(const char *type)
{
secure::init();
release();
if(case_eq(type, "sha"))
type = "sha1";
hashid = gcry_md_map_name(type);
if(hashid == GCRY_MD_NONE)
return;
gcry_md_open((MD_CTX *)&context, hashid, 0);
}
bool Digest::is(const char *type)
{
if(case_eq(type, "sha"))
type = "sha1";
return gcry_md_map_name(type) != GCRY_MD_NONE;
}
bool Digest::put(const void *address, size_t size)
{
if(!context)
return false;
gcry_md_write((MD_CTX)context, address, size);
return true;
}
const char *Digest::c_str(void)
{
if(!bufsize)
get();
return textbuf;
}
void Digest::reset(void)
{
if(!context) {
if(hashid == GCRY_MD_NONE)
return;
gcry_md_open((MD_CTX *)&context, hashid, 0);
}
else
gcry_md_reset((MD_CTX)context);
bufsize = 0;
}
void Digest::recycle(bool bin)
{
unsigned size = bufsize;
if(!context)
return;
if(!bufsize) {
gcry_md_final((MD_CTX)context);
size = gcry_md_get_algo_dlen(hashid);
memcpy(buffer, gcry_md_read((MD_CTX)context, hashid), size);
}
gcry_md_reset((MD_CTX)context);
if(bin)
gcry_md_write((MD_CTX)context, buffer, size);
else {
unsigned count = 0;
while(count < size) {
snprintf(textbuf + (count * 2), 3, "%2.2x",
buffer[count]);
++count;
}
gcry_md_write((MD_CTX)context, textbuf, size * 2);
}
bufsize = 0;
}
const unsigned char *Digest::get(void)
{
unsigned count = 0;
unsigned size = 0;
if(bufsize)
return buffer;
if(!context)
return NULL;
gcry_md_final((MD_CTX)context);
size = gcry_md_get_algo_dlen(hashid);
memcpy(buffer, gcry_md_read((MD_CTX)context, hashid), size);
release();
bufsize = size;
while(count < bufsize) {
snprintf(textbuf + (count * 2), 3, "%2.2x",
buffer[count]);
++count;
}
return buffer;
}
void Digest::uuid(char *str, const char *name, const unsigned char *ns)
{
unsigned mask = 0x50;
const char *type = "sha1";
if(!is("sha1")) {
mask = 0x30;
type = "md5";
}
Digest md(type);
if(ns)
md.put(ns, 16);
md.puts(name);
unsigned char *buf = (unsigned char *)md.get();
buf[6] &= 0x0f;
buf[6] |= mask;
buf[8] &= 0x3f;
buf[8] |= 0x80;
String::hexdump(buf, str, "4-2-2-2-6");
}
String Digest::uuid(const char *name, const unsigned char *ns)
{
char buf[38];
uuid(buf, name, ns);
return String(buf);
}
|
