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Macros | Functions | Variables
md5.c File Reference
#include "global.h"
#include "md5.h"

Go to the source code of this file.

Macros

#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
 
#define F(x, y, z)   (((x) & (y)) | ((~x) & (z)))
 
#define G(x, y, z)   (((x) & (z)) | ((y) & (~z)))
 
#define H(x, y, z)   ((x) ^ (y) ^ (z))
 
#define I(x, y, z)   ((y) ^ ((x) | (~z)))
 
#define ROTATE_LEFT(x, n)   (((x) << (n)) | (( (unsigned int) x) >> (32-(n))))
 
#define FF(a, b, c, d, x, s, ac)
 
#define GG(a, b, c, d, x, s, ac)
 
#define HH(a, b, c, d, x, s, ac)
 
#define II(a, b, c, d, x, s, ac)
 

Functions

static void MD5Transform PROTO_LIST ((UINT4[4], unsigned char[64]))
 
static void Encode PROTO_LIST ((unsigned char *, UINT4 *, unsigned int))
 
static void Decode PROTO_LIST ((UINT4 *, unsigned char *, unsigned int))
 
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int))
 
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int))
 
void MD5Init (MD5_CTX *context)
 
void MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen)
 
void MD5Final (digest, MD5_CTX *context)
 
static void MD5Transform (state, block)
 
static void Encode (unsigned char *output, UINT4 *input, unsigned int len)
 
static void Decode (UINT4 *output, unsigned char *input, unsigned int len)
 
static void MD5_memcpy (POINTER output, POINTER input, unsigned int len)
 
static void MD5_memset (POINTER output, int value, unsigned int len)
 

Variables

static unsigned char PADDING [64]
 

Macro Definition Documentation

#define F (   x,
  y,
  z 
)    (((x) & (y)) | ((~x) & (z)))

Definition at line 66 of file md5.c.

#define FF (   a,
  b,
  c,
  d,
  x,
  s,
  ac 
)
Value:
{ \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

Definition at line 83 of file md5.c.

Referenced by MD5Transform().

#define G (   x,
  y,
  z 
)    (((x) & (z)) | ((y) & (~z)))

Definition at line 67 of file md5.c.

#define GG (   a,
  b,
  c,
  d,
  x,
  s,
  ac 
)
Value:
{ \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

Definition at line 88 of file md5.c.

Referenced by MD5Transform().

#define H (   x,
  y,
  z 
)    ((x) ^ (y) ^ (z))

Definition at line 68 of file md5.c.

#define HH (   a,
  b,
  c,
  d,
  x,
  s,
  ac 
)
Value:
{ \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

Definition at line 93 of file md5.c.

Referenced by MD5Transform().

#define I (   x,
  y,
  z 
)    ((y) ^ ((x) | (~z)))

Definition at line 69 of file md5.c.

#define II (   a,
  b,
  c,
  d,
  x,
  s,
  ac 
)
Value:
{ \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

Definition at line 98 of file md5.c.

Referenced by MD5Transform().

#define ROTATE_LEFT (   x,
  n 
)    (((x) << (n)) | (( (unsigned int) x) >> (32-(n))))

Definition at line 78 of file md5.c.

#define S11   7

Definition at line 33 of file md5.c.

Referenced by MD5Transform().

#define S12   12

Definition at line 34 of file md5.c.

Referenced by MD5Transform().

#define S13   17

Definition at line 35 of file md5.c.

Referenced by MD5Transform().

#define S14   22

Definition at line 36 of file md5.c.

Referenced by MD5Transform().

#define S21   5

Definition at line 37 of file md5.c.

Referenced by MD5Transform().

#define S22   9

Definition at line 38 of file md5.c.

Referenced by MD5Transform().

#define S23   14

Definition at line 39 of file md5.c.

Referenced by MD5Transform().

#define S24   20

Definition at line 40 of file md5.c.

Referenced by MD5Transform().

#define S31   4

Definition at line 41 of file md5.c.

Referenced by MD5Transform().

#define S32   11

Definition at line 42 of file md5.c.

Referenced by MD5Transform().

#define S33   16

Definition at line 43 of file md5.c.

Referenced by MD5Transform().

#define S34   23

Definition at line 44 of file md5.c.

Referenced by MD5Transform().

#define S41   6

Definition at line 45 of file md5.c.

Referenced by MD5Transform().

#define S42   10

Definition at line 46 of file md5.c.

Referenced by MD5Transform().

#define S43   15

Definition at line 47 of file md5.c.

Referenced by MD5Transform().

#define S44   21

Definition at line 48 of file md5.c.

Referenced by MD5Transform().

Function Documentation

static void Decode ( UINT4 *  output,
unsigned char *  input,
unsigned int  len 
)
static

Definition at line 304 of file md5.c.

References i.

Referenced by MD5Transform().

308 {
309  unsigned int i, j;
310 
311  for (i = 0, j = 0; j < len; i++, j += 4)
312  output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
313  (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
314 }
static void Encode ( unsigned char *  output,
UINT4 *  input,
unsigned int  len 
)
static

Definition at line 286 of file md5.c.

References i.

Referenced by MD5Final().

290 {
291  unsigned int i, j;
292 
293  for (i = 0, j = 0; j < len; i++, j += 4) {
294  output[j] = (unsigned char)(input[i] & 0xff);
295  output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
296  output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
297  output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
298  }
299 }
static void MD5_memcpy ( POINTER  output,
POINTER  input,
unsigned int  len 
)
static

Definition at line 319 of file md5.c.

References i.

Referenced by MD5Update().

323 {
324  unsigned int i;
325 
326  for (i = 0; i < len; i++)
327  output[i] = input[i];
328 }
static void MD5_memset ( POINTER  output,
int  value,
unsigned int  len 
)
static

Definition at line 332 of file md5.c.

References i.

Referenced by MD5Final(), and MD5Transform().

336 {
337  unsigned int i;
338 
339  for (i = 0; i < len; i++)
340  ((char *)output)[i] = (char)value;
341 }
void MD5Final ( digest  ,
MD5_CTX *  context 
)

Definition at line 164 of file md5.c.

References MD5_CTX::count, Encode(), MD5_memset(), MD5Update(), and MD5_CTX::state.

167 {
168  unsigned char bits[8];
169  unsigned int index, padLen;
170 
171  /* Save number of bits */
172  Encode (bits, context->count, 8);
173 
174  /* Pad out to 56 mod 64.
175 */
176  index = (unsigned int)((context->count[0] >> 3) & 0x3f);
177  padLen = (index < 56) ? (56 - index) : (120 - index);
178  MD5Update (context, PADDING, padLen);
179 
180  /* Append length (before padding) */
181  MD5Update (context, bits, 8);
182 
183  /* Store state in digest */
184  Encode (digest, context->state, 16);
185 
186  /* Zeroize sensitive information.
187 */
188  MD5_memset ((POINTER)context, 0, sizeof (*context));
189 }
void MD5Init ( MD5_CTX *  context)

Definition at line 106 of file md5.c.

References MD5_CTX::count.

108 {
109  context->count[0] = context->count[1] = 0;
110  /* Load magic initialization constants.
111 */
112  context->state[0] = 0x67452301;
113  context->state[1] = 0xefcdab89;
114  context->state[2] = 0x98badcfe;
115  context->state[3] = 0x10325476;
116 }
static void MD5Transform ( state  ,
block   
)
static

Definition at line 193 of file md5.c.

References c, Decode(), FF, GG, HH, II, MD5_memset(), S11, S12, S13, S14, S21, S22, S23, S24, S31, S32, S33, S34, S41, S42, S43, and S44.

Referenced by MD5Update().

196 {
197  UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
198 
199  Decode (x, block, 64);
200 
201  /* Round 1 */
202  FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
203  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
204  FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
205  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
206  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
207  FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
208  FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
209  FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
210  FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
211  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
212  FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
213  FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
214  FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
215  FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
216  FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
217  FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
218 
219  /* Round 2 */
220  GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
221  GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
222  GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
223  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
224  GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
225  GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */
226  GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
227  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
228  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
229  GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
230  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
231  GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
232  GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
233  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
234  GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
235  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
236 
237  /* Round 3 */
238  HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
239  HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
240  HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
241  HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
242  HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
243  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
244  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
245  HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
246  HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
247  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
248  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
249  HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
250  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
251  HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
252  HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
253  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
254 
255  /* Round 4 */
256  II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
257  II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
258  II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
259  II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
260  II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
261  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
262  II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
263  II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
264  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
265  II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
266  II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
267  II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
268  II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
269  II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
270  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
271  II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
272 
273  state[0] += a;
274  state[1] += b;
275  state[2] += c;
276  state[3] += d;
277 
278  /* Zeroize sensitive information.
279  */
280  MD5_memset ((POINTER)x, 0, sizeof (x));
281 }
void MD5Update ( MD5_CTX *  context,
unsigned char *  input,
unsigned int  inputLen 
)

Definition at line 122 of file md5.c.

References i, MD5_memcpy(), and MD5Transform().

126 {
127  unsigned int i, index, partLen;
128 
129  /* Compute number of bytes mod 64 */
130  index = (unsigned int)((context->count[0] >> 3) & 0x3F);
131 
132  /* Update number of bits */
133  if ((context->count[0] += ((UINT4)inputLen << 3))
134  < ((UINT4)inputLen << 3))
135  context->count[1]++;
136  context->count[1] += ((UINT4)inputLen >> 29);
137 
138  partLen = 64 - index;
139 
140  /* Transform as many times as possible.
141 */
142  if (inputLen >= partLen) {
143  MD5_memcpy
144  ((POINTER)&context->buffer[index], (POINTER)input, partLen);
145  MD5Transform (context->state, context->buffer);
146 
147  for (i = partLen; i + 63 < inputLen; i += 64)
148  MD5Transform (context->state, &input[i]);
149 
150  index = 0;
151  }
152  else
153  i = 0;
154 
155  /* Buffer remaining input */
156  MD5_memcpy
157  ((POINTER)&context->buffer[index], (POINTER)&input[i],
158  inputLen-i);
159 }
static void MD5Transform PROTO_LIST ( (UINT4[4], unsigned char[64])  )
static
static void Encode PROTO_LIST ( (unsigned char *, UINT4 *, unsigned int)  )
static
static void Decode PROTO_LIST ( (UINT4 *, unsigned char *, unsigned int)  )
static
static void MD5_memcpy PROTO_LIST ( (POINTER, POINTER, unsigned int)  )
static
static void MD5_memset PROTO_LIST ( (POINTER, int, unsigned int)  )
static

Variable Documentation

unsigned char PADDING[64]
static
Initial value:
= {
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
}

Definition at line 58 of file md5.c.

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