IccMD5.cpp File Reference

#include "IccMD5.h"
#include <memory.h>
#include <string.h>

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

Functions
static void	Decode (UINT4 *, unsigned char *, unsigned int)
static void	Encode (unsigned char *, UINT4 *, unsigned int)
void ICCPROFLIB_API	icMD5Final (unsigned char *digest, MD5_CTX *context)
void ICCPROFLIB_API	icMD5Init (MD5_CTX *context)
void ICCPROFLIB_API	icMD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen)
static void	MD5Transform (UINT4[4], unsigned char[64])

Variables
static unsigned char	PADDING [64]

Detailed Description

IccMD5.cpp - RSA Data Security, Inc., MD5 message-digest algorithm

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.

Definition in file IccMD5.cpp.

Macro Definition Documentation

F

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

FF

#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); \
  }

                                 { \
 (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

G

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

GG

#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); \
  }

                                 { \
 (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

H

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

HH

#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); \
  }

                                 { \
 (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

I

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

II

#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); \
  }

                                 { \
 (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
 (a) = ROTATE_LEFT ((a), (s)); \
 (a) += (b); \
  }

ROTATE_LEFT

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

ROTATE_LEFT rotates x left n bits.

S11

#define S11   7

S12

#define S12   12

S13

#define S13   17

S14

#define S14   22

S21

#define S21   5

S22

#define S22   9

S23

#define S23   14

S24

#define S24   20

S31

#define S31   4

S32

#define S32   11

S33

#define S33   16

S34

#define S34   23

S41

#define S41   6

S42

#define S42   10

S43

#define S43   15

S44

#define S44   21

Function Documentation

Decode()

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

static

Decodes input (unsigned char) into output (UINT4). Assumes len is a multiple of 4.

{
  unsigned int i, j;
 
  for (i = 0, j = 0; j < len; i++, j += 4)
    output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
      (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
}

Referenced by MD5Transform().

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Encode()

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

static

Encodes input (UINT4) into output (unsigned char). Assumes len is a multiple of 4.

{
  unsigned int i, j;
 
  for (i = 0, j = 0; j < len; i++, j += 4) {
    output[j] = (unsigned char)(input[i] & 0xff);
    output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
    output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
    output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
  }
}

Referenced by icMD5Final().

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icMD5Final()

void ICCPROFLIB_API icMD5Final	(	unsigned char *	digest,
		MD5_CTX *	context
	)

MD5 finalization. Ends an MD5 message-digest operation, writing the the message digest and zeroizing the context.

{
  unsigned char bits[8];
  unsigned int index, padLen;
 
  /* Save number of bits */
  Encode (bits, context->count, 8);
 
  /* Pad out to 56 mod 64.
*/
  index = (unsigned int)((context->count[0] >> 3) & 0x3f);
  padLen = (index < 56) ? (56 - index) : (120 - index);
  icMD5Update (context, PADDING, padLen);
 
  /* Append length (before padding) */
  icMD5Update (context, bits, 8);
 
 
  /* Store state in digest */
  Encode (digest, context->state, 16);
 
  /* Zeroize sensitive information.
*/
  memset((POINTER)context, 0, sizeof (*context));
}

References MD5_CTX::count, Encode(), icMD5Update(), PADDING, and MD5_CTX::state.

Referenced by CalcProfileID().

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icMD5Init()

void ICCPROFLIB_API icMD5Init

(

MD5_CTX *

context

)

MD5 initialization. Begins an MD5 operation, writing a new context.

{
  context->count[0] = context->count[1] = 0;
  /* Load magic initialization constants.
*/
  context->state[0] = 0x67452301;
  context->state[1] = 0xefcdab89;
  context->state[2] = 0x98badcfe;
  context->state[3] = 0x10325476;
}

References MD5_CTX::count, and MD5_CTX::state.

Referenced by CalcProfileID().

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icMD5Update()

void ICCPROFLIB_API icMD5Update	(	MD5_CTX *	context,
		unsigned char *	input,
		unsigned int	inputLen
	)

MD5 block update operation. Continues an MD5 message-digest operation, processing another message block, and updating the context.

{
  unsigned int i, index, partLen;
 
  /* Compute number of bytes mod 64 */
  index = (unsigned int)((context->count[0] >> 3) & 0x3F);
 
  /* Update number of bits */
  if ((context->count[0] += ((UINT4)inputLen << 3))
    < ((UINT4)inputLen << 3))
    context->count[1]++;
  context->count[1] += ((UINT4)inputLen >> 29);
 
  partLen = 64 - index;
 
  /* Transform as many times as possible.
  */
  if (inputLen >= partLen) {
    memcpy((POINTER)&context->buffer[index], (POINTER)input, partLen);
    MD5Transform (context->state, context->buffer);
 
    for (i = partLen; i + 63 < inputLen; i += 64)
      MD5Transform (context->state, &input[i]);
 
    index = 0;
  }
  else
    i = 0;
 
  /* Buffer remaining input */
  memcpy((POINTER)&context->buffer[index], (POINTER)&input[i],inputLen-i);
}

References MD5_CTX::buffer, MD5_CTX::count, MD5Transform(), and MD5_CTX::state.

Referenced by CalcProfileID(), and icMD5Final().

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MD5Transform()

static void MD5Transform ( UINT4  state[4], unsigned char  block[64]  )

static

MD5 basic transformation. Transforms state based on block.

{
  UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
 
  Decode (x, block, 64);
 
  /* Round 1 */
  FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
  FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
  FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
  FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
  FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
  FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
  FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
  FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
  FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
  FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
  FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
  FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
 
 /* Round 2 */
  GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
  GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
  GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
  GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
  GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */
  GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
  GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
  GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
  GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
  GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
 
  /* Round 3 */
  HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
  HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
  HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
  HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
  HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
  HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
  HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
  HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
  HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
  HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
 
  /* Round 4 */
  II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
  II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
  II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
  II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
  II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
  II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
  II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
  II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
  II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
  II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
  II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
  II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
  II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
 
  state[0] += a;
  state[1] += b;
  state[2] += c;
  state[3] += d;
 
  /* Zeroize sensitive information.
*/
  memset((POINTER)x, 0, sizeof (x));
}

References Decode().

Referenced by icMD5Update().

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Variable Documentation

PADDING

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
}

                                   {
  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
};

Referenced by icMD5Final().