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1c1d7e |
/*
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1c1d7e |
* This code implements the MD5 message-digest algorithm.
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1c1d7e |
* The algorithm is due to Ron Rivest. This code was
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|
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1c1d7e |
* written by Colin Plumb in 1993, no copyright is claimed.
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|
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1c1d7e |
* This code is in the public domain; do with it what you wish.
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1c1d7e |
*
|
|
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1c1d7e |
* Equivalent code is available from RSA Data Security, Inc.
|
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1c1d7e |
* This code has been tested against that, and is equivalent,
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1c1d7e |
* except that you don't need to include two pages of legalese
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1c1d7e |
* with every copy.
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1c1d7e |
*
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1c1d7e |
* To compute the message digest of a chunk of bytes, declare an
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1c1d7e |
* MD5Context structure, pass it to MD5Init, call MD5Update as
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1c1d7e |
* needed on buffers full of bytes, and then call MD5Final, which
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1c1d7e |
* will fill a supplied 16-byte array with the digest.
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1c1d7e |
*
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1c1d7e |
* Changed so as no longer to depend on Colin Plumb's `usual.h' header
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1c1d7e |
* definitions; now uses stuff from dpkg's config.h.
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1c1d7e |
* - Ian Jackson <ian@chiark.greenend.org.uk>.
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1c1d7e |
* Still in the public domain.
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1c1d7e |
*/
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1c1d7e |
|
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1c1d7e |
#include <string.h> /* for memcpy() */
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1c1d7e |
#include <sys/types.h> /* for stupid systems */
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1c1d7e |
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1c1d7e |
#include "md5.h"
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1c1d7e |
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1c1d7e |
void
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1c1d7e |
MD5Transform(UWORD32 buf[4], UWORD32 const in[16]);
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1c1d7e |
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1c1d7e |
int g_bigEndian = 0;
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1c1d7e |
int g_endianessDetected = 0;
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1c1d7e |
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1c1d7e |
static void
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1c1d7e |
detectEndianess()
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1c1d7e |
{
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1c1d7e |
int nl = 0x12345678;
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1c1d7e |
short ns = 0x1234;
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1c1d7e |
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1c1d7e |
unsigned char *p = (unsigned char *)(&nl);
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1c1d7e |
unsigned char *sp = (unsigned char *)(&ns);
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1c1d7e |
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1c1d7e |
if (g_endianessDetected) return;
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1c1d7e |
if ( p[0] == 0x12 && p[1] == 0x34 && p[2] == 0x56 && p[3] == 0x78 )
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|
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1c1d7e |
{
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1c1d7e |
g_bigEndian = 1;
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1c1d7e |
}
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1c1d7e |
else if ( p[0] == 0x78 && p[1] == 0x56 && p[2] == 0x34 && p[3] == 0x12 )
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1c1d7e |
{
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1c1d7e |
g_bigEndian = 0;
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1c1d7e |
}
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1c1d7e |
else
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1c1d7e |
{
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1c1d7e |
g_bigEndian = *sp != 0x12;
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1c1d7e |
}
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1c1d7e |
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1c1d7e |
g_endianessDetected=1;
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1c1d7e |
}
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1c1d7e |
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1c1d7e |
static void
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1c1d7e |
byteSwap(UWORD32 *buf, unsigned words)
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1c1d7e |
{
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|
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1c1d7e |
md5byte *p;
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1c1d7e |
|
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1c1d7e |
if (!g_bigEndian) return;
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|
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1c1d7e |
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1c1d7e |
p = (md5byte *)buf;
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1c1d7e |
|
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1c1d7e |
do {
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1c1d7e |
*buf++ = (UWORD32)((unsigned)p[3] << 8 | p[2]) << 16 |
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1c1d7e |
((unsigned)p[1] << 8 | p[0]);
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1c1d7e |
p += 4;
|
|
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1c1d7e |
} while (--words);
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|
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1c1d7e |
}
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1c1d7e |
|
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1c1d7e |
/*
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1c1d7e |
* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
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1c1d7e |
* initialization constants.
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|
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1c1d7e |
*/
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1c1d7e |
void
|
|
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1c1d7e |
MD5Init(struct MD5Context *ctx)
|
|
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1c1d7e |
{
|
|
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1c1d7e |
detectEndianess();
|
|
Packit |
1c1d7e |
|
|
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1c1d7e |
ctx->buf[0] = 0x67452301;
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|
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1c1d7e |
ctx->buf[1] = 0xefcdab89;
|
|
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1c1d7e |
ctx->buf[2] = 0x98badcfe;
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|
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1c1d7e |
ctx->buf[3] = 0x10325476;
|
|
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1c1d7e |
|
|
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1c1d7e |
ctx->bytes[0] = 0;
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|
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1c1d7e |
ctx->bytes[1] = 0;
|
|
Packit |
1c1d7e |
}
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|
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1c1d7e |
|
|
Packit |
1c1d7e |
/*
|
|
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1c1d7e |
* Update context to reflect the concatenation of another buffer full
|
|
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1c1d7e |
* of bytes.
|
|
Packit |
1c1d7e |
*/
|
|
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1c1d7e |
void
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|
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1c1d7e |
MD5Update(struct MD5Context *ctx, md5byte const *buf, unsigned len)
|
|
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1c1d7e |
{
|
|
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1c1d7e |
UWORD32 t;
|
|
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1c1d7e |
|
|
Packit |
1c1d7e |
/* Update byte count */
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|
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1c1d7e |
|
|
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1c1d7e |
t = ctx->bytes[0];
|
|
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1c1d7e |
if ((ctx->bytes[0] = t + len) < t)
|
|
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1c1d7e |
ctx->bytes[1]++; /* Carry from low to high */
|
|
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1c1d7e |
|
|
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1c1d7e |
t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
|
|
Packit |
1c1d7e |
if (t > len) {
|
|
Packit |
1c1d7e |
memcpy((md5byte *)ctx->in + 64 - t, buf, len);
|
|
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1c1d7e |
return;
|
|
Packit |
1c1d7e |
}
|
|
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1c1d7e |
/* First chunk is an odd size */
|
|
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1c1d7e |
memcpy((md5byte *)ctx->in + 64 - t, buf, t);
|
|
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1c1d7e |
byteSwap(ctx->in, 16);
|
|
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1c1d7e |
MD5Transform(ctx->buf, ctx->in);
|
|
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1c1d7e |
buf += t;
|
|
Packit |
1c1d7e |
len -= t;
|
|
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1c1d7e |
|
|
Packit |
1c1d7e |
/* Process data in 64-byte chunks */
|
|
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1c1d7e |
while (len >= 64) {
|
|
Packit |
1c1d7e |
memcpy(ctx->in, buf, 64);
|
|
Packit |
1c1d7e |
byteSwap(ctx->in, 16);
|
|
Packit |
1c1d7e |
MD5Transform(ctx->buf, ctx->in);
|
|
Packit |
1c1d7e |
buf += 64;
|
|
Packit |
1c1d7e |
len -= 64;
|
|
Packit |
1c1d7e |
}
|
|
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1c1d7e |
|
|
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1c1d7e |
/* Handle any remaining bytes of data. */
|
|
Packit |
1c1d7e |
memcpy(ctx->in, buf, len);
|
|
Packit |
1c1d7e |
}
|
|
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1c1d7e |
|
|
Packit |
1c1d7e |
/*
|
|
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1c1d7e |
* Final wrapup - pad to 64-byte boundary with the bit pattern
|
|
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1c1d7e |
* 1 0* (64-bit count of bits processed, MSB-first)
|
|
Packit |
1c1d7e |
*/
|
|
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1c1d7e |
void
|
|
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1c1d7e |
MD5Final(md5byte digest[16], struct MD5Context *ctx)
|
|
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1c1d7e |
{
|
|
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1c1d7e |
int count = ctx->bytes[0] & 0x3f; /* Number of bytes in ctx->in */
|
|
Packit |
1c1d7e |
md5byte *p = (md5byte *)ctx->in + count;
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
/* Set the first char of padding to 0x80. There is always room. */
|
|
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1c1d7e |
*p++ = 0x80;
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
/* Bytes of padding needed to make 56 bytes (-8..55) */
|
|
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1c1d7e |
count = 56 - 1 - count;
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
if (count < 0) { /* Padding forces an extra block */
|
|
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1c1d7e |
memset(p, 0, count + 8);
|
|
Packit |
1c1d7e |
byteSwap(ctx->in, 16);
|
|
Packit |
1c1d7e |
MD5Transform(ctx->buf, ctx->in);
|
|
Packit |
1c1d7e |
p = (md5byte *)ctx->in;
|
|
Packit |
1c1d7e |
count = 56;
|
|
Packit |
1c1d7e |
}
|
|
Packit |
1c1d7e |
memset(p, 0, count);
|
|
Packit |
1c1d7e |
byteSwap(ctx->in, 14);
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
/* Append length in bits and transform */
|
|
Packit |
1c1d7e |
ctx->in[14] = ctx->bytes[0] << 3;
|
|
Packit |
1c1d7e |
ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
|
|
Packit |
1c1d7e |
MD5Transform(ctx->buf, ctx->in);
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
byteSwap(ctx->buf, 4);
|
|
Packit |
1c1d7e |
memcpy(digest, ctx->buf, 16);
|
|
Packit |
1c1d7e |
memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
|
|
Packit |
1c1d7e |
}
|
|
Packit |
1c1d7e |
|
|
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1c1d7e |
#ifndef ASM_MD5
|
|
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1c1d7e |
|
|
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1c1d7e |
/* The four core functions - F1 is optimized somewhat */
|
|
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1c1d7e |
|
|
Packit |
1c1d7e |
/* #define F1(x, y, z) (x & y | ~x & z) */
|
|
Packit |
1c1d7e |
#define F1(x, y, z) (z ^ (x & (y ^ z)))
|
|
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1c1d7e |
#define F2(x, y, z) F1(z, x, y)
|
|
Packit |
1c1d7e |
#define F3(x, y, z) (x ^ y ^ z)
|
|
Packit |
1c1d7e |
#define F4(x, y, z) (y ^ (x | ~z))
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
/* This is the central step in the MD5 algorithm. */
|
|
Packit |
1c1d7e |
#define MD5STEP(f,w,x,y,z,in,s) \
|
|
Packit |
1c1d7e |
(w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
/*
|
|
Packit |
1c1d7e |
* The core of the MD5 algorithm, this alters an existing MD5 hash to
|
|
Packit |
1c1d7e |
* reflect the addition of 16 longwords of new data. MD5Update blocks
|
|
Packit |
1c1d7e |
* the data and converts bytes into longwords for this routine.
|
|
Packit |
1c1d7e |
*/
|
|
Packit |
1c1d7e |
void
|
|
Packit |
1c1d7e |
MD5Transform(UWORD32 buf[4], UWORD32 const in[16])
|
|
Packit |
1c1d7e |
{
|
|
Packit |
1c1d7e |
register UWORD32 a, b, c, d;
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
a = buf[0];
|
|
Packit |
1c1d7e |
b = buf[1];
|
|
Packit |
1c1d7e |
c = buf[2];
|
|
Packit |
1c1d7e |
d = buf[3];
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
|
|
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1c1d7e |
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
|
|
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1c1d7e |
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
|
|
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1c1d7e |
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
|
|
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1c1d7e |
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
|
|
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1c1d7e |
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
|
|
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1c1d7e |
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
|
|
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1c1d7e |
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
|
|
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1c1d7e |
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
|
|
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1c1d7e |
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
|
|
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1c1d7e |
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
|
|
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1c1d7e |
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
|
|
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1c1d7e |
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
|
|
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1c1d7e |
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
|
|
Packit |
1c1d7e |
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
|
|
Packit |
1c1d7e |
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
|
|
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1c1d7e |
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
|
|
Packit |
1c1d7e |
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
|
|
Packit |
1c1d7e |
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
|
|
Packit |
1c1d7e |
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
|
|
Packit |
1c1d7e |
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
|
|
Packit |
1c1d7e |
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
|
|
Packit |
1c1d7e |
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
|
|
Packit |
1c1d7e |
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
|
|
Packit |
1c1d7e |
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
|
|
Packit |
1c1d7e |
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
|
|
Packit |
1c1d7e |
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
|
|
Packit |
1c1d7e |
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
|
|
Packit |
1c1d7e |
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
|
|
Packit |
1c1d7e |
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
|
|
Packit |
1c1d7e |
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
|
|
Packit |
1c1d7e |
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
|
|
Packit |
1c1d7e |
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
|
|
Packit |
1c1d7e |
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
|
|
Packit |
1c1d7e |
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
|
|
Packit |
1c1d7e |
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
|
|
Packit |
1c1d7e |
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
|
|
Packit |
1c1d7e |
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
|
|
Packit |
1c1d7e |
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
|
|
Packit |
1c1d7e |
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
|
|
Packit |
1c1d7e |
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
|
|
Packit |
1c1d7e |
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
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Packit |
1c1d7e |
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
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Packit |
1c1d7e |
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
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Packit |
1c1d7e |
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
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Packit |
1c1d7e |
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
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Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
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|
Packit |
1c1d7e |
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
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|
Packit |
1c1d7e |
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
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|
Packit |
1c1d7e |
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
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|
Packit |
1c1d7e |
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
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|
Packit |
1c1d7e |
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
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|
Packit |
1c1d7e |
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
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|
Packit |
1c1d7e |
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
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|
Packit |
1c1d7e |
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
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|
Packit |
1c1d7e |
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
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|
Packit |
1c1d7e |
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
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|
Packit |
1c1d7e |
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
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|
Packit |
1c1d7e |
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
|
|
Packit |
1c1d7e |
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
|
|
Packit |
1c1d7e |
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
|
|
Packit |
1c1d7e |
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
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|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
buf[0] += a;
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|
Packit |
1c1d7e |
buf[1] += b;
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|
Packit |
1c1d7e |
buf[2] += c;
|
|
Packit |
1c1d7e |
buf[3] += d;
|
|
Packit |
1c1d7e |
}
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
#endif
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
void MD5Buffer (const unsigned char *buf,unsigned int len,unsigned char sig[16])
|
|
Packit |
1c1d7e |
{
|
|
Packit |
1c1d7e |
struct MD5Context md5;
|
|
Packit |
1c1d7e |
MD5Init(&md5;;
|
|
Packit |
1c1d7e |
MD5Update(&md5,buf,len);
|
|
Packit |
1c1d7e |
MD5Final(sig,&md5;;
|
|
Packit |
1c1d7e |
}
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
#define HEX_STRING "0123456789abcdef" /* to convert to hex */
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
void MD5SigToString(unsigned char signature[16],char *str,int len)
|
|
Packit |
1c1d7e |
{
|
|
Packit |
1c1d7e |
unsigned char *sig_p;
|
|
Packit |
1c1d7e |
char *str_p, *max_p;
|
|
Packit |
1c1d7e |
unsigned int high, low;
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
str_p = str;
|
|
Packit |
1c1d7e |
max_p = str + len;
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
for (sig_p = (unsigned char *)signature;
|
|
Packit |
1c1d7e |
sig_p < (unsigned char *)signature + 16;
|
|
Packit |
1c1d7e |
sig_p++)
|
|
Packit |
1c1d7e |
{
|
|
Packit |
1c1d7e |
high = *sig_p / 16;
|
|
Packit |
1c1d7e |
low = *sig_p % 16;
|
|
Packit |
1c1d7e |
/* account for 2 chars */
|
|
Packit |
1c1d7e |
if (str_p + 1 >= max_p) {
|
|
Packit |
1c1d7e |
break;
|
|
Packit |
1c1d7e |
}
|
|
Packit |
1c1d7e |
*str_p++ = HEX_STRING[high];
|
|
Packit |
1c1d7e |
*str_p++ = HEX_STRING[low];
|
|
Packit |
1c1d7e |
}
|
|
Packit |
1c1d7e |
/* account for 2 chars */
|
|
Packit |
1c1d7e |
if (str_p < max_p) {
|
|
Packit |
1c1d7e |
*str_p++ = '\0';
|
|
Packit |
1c1d7e |
}
|
|
Packit |
1c1d7e |
}
|
|
Packit |
1c1d7e |
|
|
Packit |
1c1d7e |
|