md5.cpp

比较简单的md5的应用,用户使用起来非常方便

		MD5_memcpy
			((POINTER) & context->buffer[index], (POINTER) input, partLen);
		MD5Transform(context->state, context->buffer);

		for (i = partLen; i + 63 < inputLen; i += 64)
			MD5Transform(context->state, (unsigned char *) &input[i]);

		index = 0;
	}
	else
		i = 0;

	/*
	Buffer remaining input 
	*/
	MD5_memcpy
		((POINTER) & context->buffer[index], (POINTER) & input[i],
		inputLen - i);
}

/*
MD5 finalization. Ends an MD5 message-digest operation, writing the
the message digest and zeroizing the context.
*/
void
MD5Final(
		 MD5_CTX *context,
		 unsigned char digest[16]	
		 )
		 {
			 unsigned char bits[8];
			 unsigned int index, padLen;
			 //char *digest = (char*)malloc(16);

			 /*
			 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);
			 MD5Update(context, PADDING, padLen);

			 /*
			 Append length (before padding) 
			 */
			 MD5Update(context, bits, 8);



			 /*
			 Store state in digest 
			 */
			 Encode((unsigned char*)digest, context->state, 16);

			 /*
			 Zeroize sensitive information.
			 */
			 MD5_memset((POINTER) context, 0, sizeof(*context));

			 // return digest;
		 }

		 /*
		 MD5 basic transformation. Transforms state based on block.
		 */
		 static void
			 MD5Transform(
			 word32 state[4],
			 unsigned char block[64]
			 )
			 {
				 word32 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.



				 */
				 MD5_memset((POINTER) x, 0, sizeof(x));
			 }

			 /*
			 Encodes input (word32) into output (unsigned char). Assumes len is
			 a multiple of 4.
			 */
			 static void
				 Encode(
				 unsigned char *output,
				 word32 *input,
				 unsigned int len
				 )
			 {
				 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);
				 }
			 }

			 /*
			 Decodes input (unsigned char) into output (word32). Assumes len is
			 a multiple of 4.
			 */
			 static void
				 Decode(
				 word32 *output,
				 unsigned char *input,
				 unsigned int len
				 )
			 {
				 unsigned int i, j;

				 for (i = 0, j = 0; j < len; i++, j += 4)
					 output[i] = ((word32) input[j]) | (((word32) input[j + 1]) << 8) |
					 (((word32) input[j + 2]) << 16) | (((word32) input[j + 3]) << 24);
			 }

			 // nBittage must be 128 or 256
			 void Hash(void* pzData, int nDataLength, unsigned char *pDest, int nBittage)
			 {
				 MD5_CTX ctx;
				 MD5Init(&ctx);
				 MD5Update(&ctx, (unsigned char *)pzData, nDataLength);
				 MD5Final(&ctx, pDest);

				 // for now just use 2 identical 128 bit hashes back to back
				 // for a 256 bit hash.  This will be replaced soon.
				 if (nBittage == 256)
				 {
					 MD5Init(&ctx);
					 MD5Update(&ctx, (unsigned char *)pzData, nDataLength);
					 MD5Final(&ctx, &pDest[16]);
				 }
			 }

			 /*
			 Note: Replace "for loop" with standard memcpy if possible.
			 */
			 /*
			 static void
			 MD5_memcpy(
			 POINTER output,
			 POINTER input,
			 unsigned int len
			 )
			 {
			 unsigned int i;

			 for (i = 0; i < len; i++)
			 output[i] = input[i];
			 }
			 */
			 /*
			 Note: Replace "for loop" with standard memset if possible.
			 */
			 /*
			 static void
			 MD5_memset(
			 POINTER output,
			 int value,
			 unsigned int len
			 )
			 {
			 unsigned int i;

			 for (i = 0; i < len; i++)
			 ((char *) output)[i] = (char) value;
			 }
			 */


#endif // USE_IMPL_2




#ifdef USE_IMPL_3

#include "mhash_md5.h"
#include <string.h>

			 char *ap_cpystrn(char *dst, const char *src, size_t dst_size)
			 {

				 char *d, *end;

				 if (!dst_size)
					 return (dst);

				 d = dst;
				 end = dst + dst_size - 1;

				 for (; d < end; ++d, ++src) {
					 if (!(*d = *src)) {
						 return (d);
					 }
				 }

				 *d = '\0';	/* always null terminate */

				 return (d);
			 }



			 /* Constants for MD5Transform routine.
			 */

#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

			 static void MD5Transform(UINT4 state[4], const unsigned char block[64]);
			 static void Encode(unsigned char *output, const UINT4 *input,
				 unsigned int len);
			 static void Decode(UINT4 *output, const unsigned char *input,
				 unsigned int len);

			 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
			 };

			 /* F, G, H and I are basic MD5 functions.