File: md5.c

package info (click to toggle)
vdr-plugin-epgsearch 1.0.1~beta3-5
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 2,764 kB
  • ctags: 2,316
  • sloc: ansic: 23,300; perl: 1,330; sh: 608; makefile: 193
file content (320 lines) | stat: -rw-r--r-- 9,547 bytes parent folder | download | duplicates (3)
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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
/*                                                                  -*- c++ -*-
Copyright (C) 2004-2013 Christian Wieninger

This program 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.

This program 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
Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html

The author can be reached at cwieninger@gmx.de

The project's page is at http://winni.vdr-developer.org/epgsearch
*/

/////////////////////////////////////////////////////////////////////////
// MD5.cpp
// Implementation file for MD5 class
//
// This C++ Class implementation of the original RSA Data Security, Inc.
// MD5 Message-Digest Algorithm is copyright (c) 2002, Gary McNickle.
// All rights reserved.  This software is a derivative of the "RSA Data
//  Security, Inc. MD5 Message-Digest Algorithm"
//
// You may use this software free of any charge, but without any
// warranty or implied warranty, provided that you follow the terms
// of the original RSA copyright, listed below.
//
// Original RSA Data Security, Inc. Copyright notice
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
// rights reserved.
//
// License to copy and use this software is granted provided that it
// is identified as the "RSA Data Security, Inc. MD5 Message-Digest
// Algorithm" in all material mentioning or referencing this software
// or this function.
// License is also granted to make and use derivative works provided
// that such works are identified as "derived from the RSA Data
// Security, Inc. MD5 Message-Digest Algorithm" in all material
// mentioning or referencing the derived work.
// RSA Data Security, Inc. makes no representations concerning either
// the merchantability of this software or the suitability of this
// software for any particular purpose. It is provided "as is"
// without express or implied warranty of any kind.
// These notices must be retained in any copies of any part of this
// documentation and/or software.
/////////////////////////////////////////////////////////////////////////

#include <assert.h>
#include <memory.h>
#include <stdio.h>
#include <string.h>
#include "md5.h"


static unsigned char PADDING[64] =
{
  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21


// PrintMD5: Converts a completed md5 digest into a char* string.
char* PrintMD5(uchar md5Digest[16])
{
	char chBuffer[256];
	char chEach[10];
	int nCount;

	memset(chBuffer,0,256);
	memset(chEach, 0, 10);

	for (nCount = 0; nCount < 16; nCount++)
	{
		sprintf(chEach, "%02x", md5Digest[nCount]);
		strncat(chBuffer, chEach, sizeof(chEach));
	}

	return strdup(chBuffer);
}

// MD5String: Performs the MD5 algorithm on a char* string, returning
// the results as a char*.
char* MD5String(char* szString)
{
	int nLen = strlen(szString);
	md5 alg;

	alg.Update((unsigned char*)szString, (unsigned int)nLen);
	alg.Finalize();

	return PrintMD5(alg.Digest());

}

// md5::Init
// Initializes a new context.
void md5::Init()
{
	memset(m_Count, 0, 2 * sizeof(uint4));

	m_State[0] = 0x67452301;
	m_State[1] = 0xefcdab89;
	m_State[2] = 0x98badcfe;
	m_State[3] = 0x10325476;
}

// md5::Update
// MD5 block update operation. Continues an MD5 message-digest
// operation, processing another message block, and updating the
// context.
void md5::Update(uchar* chInput, uint4 nInputLen)
{
	uint4 i, index, partLen;

	// Compute number of bytes mod 64
	index = (unsigned int)((m_Count[0] >> 3) & 0x3F);

	// Update number of bits
	if ((m_Count[0] += (nInputLen << 3)) < (nInputLen << 3))
		m_Count[1]++;

	m_Count[1] += (nInputLen >> 29);

	partLen = 64 - index;

	// Transform as many times as possible.
	if (nInputLen >= partLen)
	{
		memcpy( &m_Buffer[index], chInput, partLen );
		Transform(m_Buffer);

		for (i = partLen; i + 63 < nInputLen; i += 64)
			Transform(&chInput[i]);

		index = 0;
	}
	else
		i = 0;

  // Buffer remaining input
  memcpy( &m_Buffer[index], &chInput[i], nInputLen-i );
}

// md5::Finalize
// MD5 finalization. Ends an MD5 message-digest operation, writing
// the message digest and zeroizing the context.
void md5::Finalize()
{
	uchar bits[8];
	uint4 index, padLen;

	// Save number of bits
	Encode (bits, m_Count, 8);

	// Pad out to 56 mod 64
	index = (unsigned int)((m_Count[0] >> 3) & 0x3f);
	padLen = (index < 56) ? (56 - index) : (120 - index);
	Update(PADDING, padLen);

	// Append length (before padding)
	Update (bits, 8);

	// Store state in digest
	Encode (m_Digest, m_State, 16);

	memset(m_Count, 0, 2 * sizeof(uint4));
	memset(m_State, 0, 4 * sizeof(uint4));
	memset(m_Buffer,0, 64 * sizeof(uchar));
}

// md5::Transform
// MD5 basic transformation. Transforms state based on block.
void md5::Transform (uchar* block)
{
  uint4 a = m_State[0], b = m_State[1], c = m_State[2], d = m_State[3], x[16];

  Decode (x, block, 64);

  // Round 1
  FF (a, b, c, d, x[ 0], S11, 0xd76aa478);
  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756);
  FF (c, d, a, b, x[ 2], S13, 0x242070db);
  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee);
  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf);
  FF (d, a, b, c, x[ 5], S12, 0x4787c62a);
  FF (c, d, a, b, x[ 6], S13, 0xa8304613);
  FF (b, c, d, a, x[ 7], S14, 0xfd469501);
  FF (a, b, c, d, x[ 8], S11, 0x698098d8);
  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af);
  FF (c, d, a, b, x[10], S13, 0xffff5bb1);
  FF (b, c, d, a, x[11], S14, 0x895cd7be);
  FF (a, b, c, d, x[12], S11, 0x6b901122);
  FF (d, a, b, c, x[13], S12, 0xfd987193);
  FF (c, d, a, b, x[14], S13, 0xa679438e);
  FF (b, c, d, a, x[15], S14, 0x49b40821);

 // Round 2
  GG (a, b, c, d, x[ 1], S21, 0xf61e2562);
  GG (d, a, b, c, x[ 6], S22, 0xc040b340);
  GG (c, d, a, b, x[11], S23, 0x265e5a51);
  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa);
  GG (a, b, c, d, x[ 5], S21, 0xd62f105d);
  GG (d, a, b, c, x[10], S22,  0x2441453);
  GG (c, d, a, b, x[15], S23, 0xd8a1e681);
  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8);
  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6);
  GG (d, a, b, c, x[14], S22, 0xc33707d6);
  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87);
  GG (b, c, d, a, x[ 8], S24, 0x455a14ed);
  GG (a, b, c, d, x[13], S21, 0xa9e3e905);
  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8);
  GG (c, d, a, b, x[ 7], S23, 0x676f02d9);
  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a);

  // Round 3
  HH (a, b, c, d, x[ 5], S31, 0xfffa3942);
  HH (d, a, b, c, x[ 8], S32, 0x8771f681);
  HH (c, d, a, b, x[11], S33, 0x6d9d6122);
  HH (b, c, d, a, x[14], S34, 0xfde5380c);
  HH (a, b, c, d, x[ 1], S31, 0xa4beea44);
  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9);
  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60);
  HH (b, c, d, a, x[10], S34, 0xbebfbc70);
  HH (a, b, c, d, x[13], S31, 0x289b7ec6);
  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa);
  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085);
  HH (b, c, d, a, x[ 6], S34,  0x4881d05);
  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039);
  HH (d, a, b, c, x[12], S32, 0xe6db99e5);
  HH (c, d, a, b, x[15], S33, 0x1fa27cf8);
  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665);

  // Round 4
  II (a, b, c, d, x[ 0], S41, 0xf4292244);
  II (d, a, b, c, x[ 7], S42, 0x432aff97);
  II (c, d, a, b, x[14], S43, 0xab9423a7);
  II (b, c, d, a, x[ 5], S44, 0xfc93a039);
  II (a, b, c, d, x[12], S41, 0x655b59c3);
  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92);
  II (c, d, a, b, x[10], S43, 0xffeff47d);
  II (b, c, d, a, x[ 1], S44, 0x85845dd1);
  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f);
  II (d, a, b, c, x[15], S42, 0xfe2ce6e0);
  II (c, d, a, b, x[ 6], S43, 0xa3014314);
  II (b, c, d, a, x[13], S44, 0x4e0811a1);
  II (a, b, c, d, x[ 4], S41, 0xf7537e82);
  II (d, a, b, c, x[11], S42, 0xbd3af235);
  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb);
  II (b, c, d, a, x[ 9], S44, 0xeb86d391);

  m_State[0] += a;
  m_State[1] += b;
  m_State[2] += c;
  m_State[3] += d;

  memset(x, 0, sizeof(x));
}

// md5::Encode
// Encodes input (uint4) into output (uchar). Assumes nLength is
// a multiple of 4.
void md5::Encode(uchar* dest, uint4* src, uint4 nLength)
{
	uint4 i, j;

	assert(nLength % 4 == 0);

	for (i = 0, j = 0; j < nLength; i++, j += 4)
	{
		dest[j] = (uchar)(src[i] & 0xff);
		dest[j+1] = (uchar)((src[i] >> 8) & 0xff);
		dest[j+2] = (uchar)((src[i] >> 16) & 0xff);
		dest[j+3] = (uchar)((src[i] >> 24) & 0xff);
	}
}

// md5::Decode
// Decodes input (uchar) into output (uint4). Assumes nLength is
// a multiple of 4.
void md5::Decode(uint4* dest, uchar* src, uint4 nLength)
{
	uint4 i, j;

	assert(nLength % 4 == 0);

	for (i = 0, j = 0; j < nLength; i++, j += 4)
	{
		dest[i] = ((uint4)src[j]) | (((uint4)src[j+1])<<8) |
			      (((uint4)src[j+2])<<16) | (((uint4)src[j+3])<<24);
	}
}