java和c++的语法差别也不是很大吧...
我这有个类,别人写的,先给个使用的例子你看,
#include <iostream.h>
#include "md5_ctx.h"int main(int argc, char* argv[])
{
MD5_CTX test; //MD5_CTX是md5算法封装
cout << test.MD5String("password") << endl; //MD5String根据传进来的字符,返回对应的md5码
return 0;
}
我这有个类,别人写的,先给个使用的例子你看,
#include <iostream.h>
#include "md5_ctx.h"int main(int argc, char* argv[])
{
MD5_CTX test; //MD5_CTX是md5算法封装
cout << test.MD5String("password") << endl; //MD5String根据传进来的字符,返回对应的md5码
return 0;
}
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#pragma once/******************************************************************************
* Copyright (C) 2000 by Robert Hubley. *
* All rights reserved. *
* *
* This software is provided ``AS IS'' and any express or implied *
* warranties, including, but not limited to, the implied warranties of *
* merchantability and fitness for a particular purpose, are disclaimed. *
* In no event shall the authors be liable for any direct, indirect, *
* incidental, special, exemplary, or consequential damages (including, but *
* not limited to, procurement of substitute goods or services; loss of use, *
* data, or profits; or business interruption) however caused and on any *
* theory of liability, whether in contract, strict liability, or tort *
* (including negligence or otherwise) arising in any way out of the use of *
* this software, even if advised of the possibility of such damage. *
* *
****************************************************************************** MD5.H - header file for MD5C.C
Port to Win32 DLL by Robert Hubley 1/5/2000 Original Copyright: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.
*/
/******************************************************************************
* Copyright (C) 2000 by Robert Hubley. *
* All rights reserved. *
* *
* This software is provided ``AS IS'' and any express or implied *
* warranties, including, but not limited to, the implied warranties of *
* merchantability and fitness for a particular purpose, are disclaimed. *
* In no event shall the authors be liable for any direct, indirect, *
* incidental, special, exemplary, or consequential damages (including, but *
* not limited to, procurement of substitute goods or services; loss of use, *
* data, or profits; or business interruption) however caused and on any *
* theory of liability, whether in contract, strict liability, or tort *
* (including negligence or otherwise) arising in any way out of the use of *
* this software, even if advised of the possibility of such damage. *
* *
******************************************************************************
*//******************************************************************************
* 2002-4-18 Modified by Liguangyi. *
* struct MD5_CTX ==> class MD5_CTX. *
* Take off the Globals Functions *
******************************************************************************
*//* MD5 Class. */
class MD5_CTX {
public:
MD5_CTX();
virtual ~MD5_CTX();
char* MD5String(const char* string);
void MD5Update (unsigned char *input, unsigned int inputLen);
void MD5Final (unsigned char digest[16]);private:
unsigned long int state[4];/* state (ABCD) */
unsigned long int count[2];/* number of bits, modulo 2^64 (lsb first) */
unsigned char buffer[64];/* input buffer */
unsigned char PADDING[64];/* What? */private:
void MD5Init ();
void MD5Transform (unsigned long int state[4], unsigned char block[64]);
void MD5_memcpy (unsigned char* output, unsigned char* input,unsigned int len);
void Encode (unsigned char *output, unsigned long int *input,unsigned int len);
void Decode (unsigned long int *output, unsigned char *input, unsigned int len);
void MD5_memset (unsigned char* output,int value,unsigned int len);
};
#include "md5_ctx.h"
/******************************************************************************
* Copyright (C) 2000 by Robert Hubley. *
* All rights reserved. *
* *
* This software is provided ``AS IS'' and any express or implied *
* warranties, including, but not limited to, the implied warranties of *
* merchantability and fitness for a particular purpose, are disclaimed. *
* In no event shall the authors be liable for any direct, indirect, *
* incidental, special, exemplary, or consequential damages (including, but *
* not limited to, procurement of substitute goods or services; loss of use, *
* data, or profits; or business interruption) however caused and on any *
* theory of liability, whether in contract, strict liability, or tort *
* (including negligence or otherwise) arising in any way out of the use of *
* this software, even if advised of the possibility of such damage. *
* *
******************************************************************************MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithmPort to Win32 DLL by Robert Hubley 1/5/2000Original Copyright: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.
*/
/* 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/* F, G, H and I are basic MD5 functions.
*/
#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)))/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/MD5_CTX::MD5_CTX()
{
MD5Init();
}MD5_CTX::~MD5_CTX()
{
}void MD5_CTX::MD5Init ()
{
this->count[0] = this->count[1] = 0;
/* Load magic initialization constants.*/
this->state[0] = 0x67452301;
this->state[1] = 0xefcdab89;
this->state[2] = 0x98badcfe;
this->state[3] = 0x10325476;
/* Add by Liguangyi */
MD5_memset(PADDING, 0, sizeof(PADDING));
*PADDING=0x80;
//PADDING = {
//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};
}/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5_CTX::MD5Update (unsigned char *input,unsigned int inputLen)
{
unsigned int i, index, partLen;/* Compute number of bytes mod 64 */
index = (unsigned int)((this->count[0] >> 3) & 0x3F);/* Update number of bits */
if ((this->count[0] += ((unsigned long int)inputLen << 3))
< ((unsigned long int)inputLen << 3))
this->count[1]++;
this->count[1] += ((unsigned long int)inputLen >> 29);partLen = 64 - index;/* Transform as many times as possible.
*/
if (inputLen >= partLen) {
MD5_memcpy((unsigned char*)&this->buffer[index],
(unsigned char*)input, partLen);
MD5Transform (this->state, this->buffer);for (i = partLen; i + 63 < inputLen; i += 64)
MD5Transform (this->state, &input[i]);index = 0;
}
else
i = 0;/* Buffer remaining input */
MD5_memcpy ((unsigned char*)&this->buffer[index], (unsigned char*)&input[i], inputLen-i);
}
关键字搜索 MD5Init MD5Update, 如
http://cvs.sf.net/viewcvs.py/wxcode/wxCode/components/webupdate/src/md5.cpp?rev=1.5Allocate an MD5_CTX, initialize it with MD5Init(), run over the
data with MD5Update(), and finally extract the result using MD5Final().
When a null pointer is passed to MD5Final() as first argument only the
final padding will be applied and the current context can still be used
with MD5Update().