尝试在LR里实现字符串的MD5计算。

一、在LR里添加头文件md5.h，在globals.h里添加引用#include "md5.h"；

二、md5.h代码如下：

#ifndef MD5_H

#define MD5_H

#ifdef __alpha

typedef unsigned int uint32;

#else

typedef unsigned long uint32;

#endif

struct MD5Context {

uint32 buf[4];

uint32 bits[2];

unsigned char in[64];

};

extern void MD5Init();

extern void MD5Update();

extern void MD5Final();

extern void MD5Transform();

typedef struct MD5Context MD5_CTX;

#endif

#ifdef sgi

#define HIGHFIRST

#endif

#ifdef sun

#define HIGHFIRST

#endif

#ifndef HIGHFIRST

#define byteReverse(buf, len) /* Nothing */

#else

void byteReverse(buf, longs)unsigned char *buf; unsigned longs;

{

uint32 t;

do {

t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |((unsigned)buf[1] << 8 | buf[0]);

*(uint32 *) buf = t;

buf += 4;

} while (--longs);

}

#endif

void MD5Init(ctx)struct MD5Context *ctx;

{

ctx->buf[0] = 0x67452301;

ctx->buf[1] = 0xefcdab89;

ctx->buf[2] = 0x98badcfe;

ctx->buf[3] = 0x10325476;

ctx->bits[0] = 0;

ctx->bits[1] = 0;

}

void MD5Update(ctx, buf, len) struct MD5Context *ctx; unsigned char *buf;unsigned len;

{

uint32 t;

t = ctx->bits[0];

if ((ctx->bits[0] = t + ((uint32) len << 3)) < t)

ctx->bits[1]++;

ctx->bits[1] += len >> 29;

t = (t >> 3) & 0x3f;

if (t) {

unsigned char *p = (unsigned char *) ctx->in + t;

t = 64 - t;

if (len < t) {

memcpy(p, buf, len);

return;

}

memcpy(p, buf, t);

byteReverse(ctx->in, 16);

MD5Transform(ctx->buf, (uint32 *) ctx->in);

buf += t;

len -= t;

}

while (len >= 64) {

memcpy(ctx->in, buf, 64);

byteReverse(ctx->in, 16);

MD5Transform(ctx->buf, (uint32 *) ctx->in);

buf += 64;

len -= 64;

}

memcpy(ctx->in, buf, len);

}

void MD5Final(digest, ctx)

unsigned char digest[16]; struct MD5Context *ctx;

{

unsigned count;

unsigned char *p;

count = (ctx->bits[0] >> 3) & 0x3F;

p = ctx->in + count;

*p++ = 0x80;

count = 64 - 1 - count;

if (count < 8) {

memset(p, 0, count);

byteReverse(ctx->in, 16);

MD5Transform(ctx->buf, (uint32 *) ctx->in);

memset(ctx->in, 0, 56);

} else {

memset(p, 0, count - 8);

}

byteReverse(ctx->in, 14);

((uint32 *) ctx->in)[14] = ctx->bits[0];

((uint32 *) ctx->in)[15] = ctx->bits[1];

MD5Transform(ctx->buf, (uint32 *) ctx->in);

byteReverse((unsigned char *) ctx->buf, 4);

memcpy(digest, ctx->buf, 16);

memset(ctx, 0, sizeof(ctx));

}

#define F1(x, y, z) (z ^ (x & (y ^ z)))

#define F2(x, y, z) F1(z, x, y)

#define F3(x, y, z) (x ^ y ^ z)

#define F4(x, y, z) (y ^ (x | ~z))

#define MD5STEP(f, w, x, y, z, data, s) ( w += f(x, y, z) + data, w =w<>(32-s), w += x )

void MD5Transform(buf, in)

uint32 buf[4]; uint32 in[16];

{

register uint32 a, b, c, d;

a = buf[0];

b = buf[1];

c = buf[2];

d = buf[3];

MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);

MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);

MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);

MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);

MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);

MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);

MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);

MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);

MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);

MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);

MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);

MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);

MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);

MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);

MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);

MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);

MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);

MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);

MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);

MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);

MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);

MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);

MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);

MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);

MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);

MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);

MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);

MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);

MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);

MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);

MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);

MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);

MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);

MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);

MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);

MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);

MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);

MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);

MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);

MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);

MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);

MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);

MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);

MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);

MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);

MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);

MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);

MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);

MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);

MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);

MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);

MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);

MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);

MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);

MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);

MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);

MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);

MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);

MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);

MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);

MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);

MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);

MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);

MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);

buf[0] += a;

buf[1] += b;

buf[2] += c;

buf[3] += d;

}

void GetMd5FromString(const char* s,char* resStr)

{

struct MD5Context md5c;

unsigned char ss[16];

char subStr[3];

int i;

MD5Init( &md5c );

MD5Update( &md5c, s, strlen(s) );

MD5Final( ss, &md5c );

strcpy(resStr,"");

for( i=0; i<16; i++ )

{

sprintf(subStr, "%02x", ss[i] );

itoa(ss[i],subStr,16);

if (strlen(subStr)==1) {

strcat(resStr,"0");

}

strcat(resStr,subStr);

}

strcat(resStr,"\0");

}

[if !supportLineBreakNewLine]

[endif]

三、调用的例子如下：

{

char Md5[33];

GetMd5FromString("a",Md5);

lr_output_message(Md5);

}

输出结果：

Running Vuser...

Starting iteration 1.

Starting action main.

main.c(5): 0cc175b9c0f1b6a831c399e269772661

Ending action main.