author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:30:33 +0300 | |
branch | RCL_3 |
changeset 29 | 567bb019e3e3 |
permissions | -rw-r--r-- |
29
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/* |
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* This code implements the MD5 message-digest algorithm. |
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* The algorithm is due to Ron Rivest. This code was |
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* written by Colin Plumb in 1993, no copyright is claimed. |
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* This code is in the public domain; do with it what you wish. |
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* |
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* Equivalent code is available from RSA Data Security, Inc. |
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* This code has been tested against that, and is equivalent, |
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* except that you don't need to include two pages of legalese |
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* with every copy. |
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* |
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* To compute the message digest of a chunk of bytes, declare an |
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* MD5Context structure, pass it to MD5Init, call MD5Update as |
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* needed on buffers full of bytes, and then call MD5Final, which |
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* will fill a supplied 16-byte array with the digest. |
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*/ |
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|
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/* Brutally hacked by John Walker back from ANSI C to K&R (no |
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prototypes) to maintain the tradition that Netfone will compile |
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with Sun's original "cc". */ |
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|
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#include <string.h> /* for memcpy() */ |
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#include <glib.h> |
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#include "md5.h" |
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#if G_BYTE_ORDER == G_BIG_ENDIAN |
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#define HIGHFIRST |
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#endif |
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#ifndef HIGHFIRST |
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#define byteReverse(buf, len) /* Nothing */ |
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#else |
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/* |
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* Note: this code is harmless on little-endian machines. |
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*/ |
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void |
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byteReverse (buf, longs) |
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unsigned char *buf; |
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unsigned longs; |
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{ |
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uint32 t; |
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do { |
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t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 | |
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((unsigned) buf[1] << 8 | buf[0]); |
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*(uint32 *) buf = t; |
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buf += 4; |
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} while (--longs); |
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} |
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#endif |
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|
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/* |
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* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious |
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* initialization constants. |
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*/ |
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void |
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MD5Init (ctx) |
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struct MD5Context *ctx; |
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{ |
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ctx->buf[0] = 0x67452301; |
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ctx->buf[1] = 0xefcdab89; |
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ctx->buf[2] = 0x98badcfe; |
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ctx->buf[3] = 0x10325476; |
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|
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ctx->bits[0] = 0; |
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ctx->bits[1] = 0; |
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} |
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/* |
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* Update context to reflect the concatenation of another buffer full |
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* of bytes. |
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*/ |
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void |
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MD5Update (ctx, buf, len) |
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struct MD5Context *ctx; |
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const char *buf; |
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unsigned len; |
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{ |
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uint32 t; |
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|
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/* Update bitcount */ |
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|
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t = ctx->bits[0]; |
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if ((ctx->bits[0] = t + ((uint32) len << 3)) < t) |
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ctx->bits[1]++; /* Carry from low to high */ |
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ctx->bits[1] += len >> 29; |
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|
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t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ |
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|
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/* Handle any leading odd-sized chunks */ |
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if (t) { |
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unsigned char *p = (unsigned char *) ctx->in + t; |
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t = 64 - t; |
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if (len < t) { |
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memcpy (p, buf, len); |
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return; |
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} |
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memcpy (p, buf, t); |
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byteReverse (ctx->in, 16); |
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MD5Transform (ctx->buf, (uint32 *) ctx->in); |
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buf += t; |
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len -= t; |
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} |
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106 |
/* Process data in 64-byte chunks */ |
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107 |
|
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while (len >= 64) { |
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memcpy (ctx->in, buf, 64); |
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byteReverse (ctx->in, 16); |
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MD5Transform (ctx->buf, (uint32 *) ctx->in); |
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buf += 64; |
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len -= 64; |
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} |
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115 |
|
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/* Handle any remaining bytes of data. */ |
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117 |
|
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memcpy (ctx->in, buf, len); |
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} |
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120 |
|
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/* |
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* Final wrapup - pad to 64-byte boundary with the bit pattern |
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* 1 0* (64-bit count of bits processed, MSB-first) |
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*/ |
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125 |
void |
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MD5Final (digest, ctx) |
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unsigned char digest[16]; |
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struct MD5Context *ctx; |
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{ |
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unsigned count; |
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unsigned char *p; |
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132 |
|
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/* Compute number of bytes mod 64 */ |
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count = (ctx->bits[0] >> 3) & 0x3F; |
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135 |
|
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/* Set the first char of padding to 0x80. This is safe since there is |
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always at least one byte free */ |
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p = ctx->in + count; |
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*p++ = 0x80; |
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140 |
|
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/* Bytes of padding needed to make 64 bytes */ |
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count = 64 - 1 - count; |
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143 |
|
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/* Pad out to 56 mod 64 */ |
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if (count < 8) { |
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/* Two lots of padding: Pad the first block to 64 bytes */ |
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memset (p, 0, count); |
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byteReverse (ctx->in, 16); |
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MD5Transform (ctx->buf, (uint32 *) ctx->in); |
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150 |
|
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/* Now fill the next block with 56 bytes */ |
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memset (ctx->in, 0, 56); |
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} else { |
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/* Pad block to 56 bytes */ |
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memset (p, 0, count - 8); |
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} |
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byteReverse (ctx->in, 14); |
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158 |
|
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/* Append length in bits and transform */ |
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((uint32 *) ctx->in)[14] = ctx->bits[0]; |
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((uint32 *) ctx->in)[15] = ctx->bits[1]; |
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162 |
|
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MD5Transform (ctx->buf, (uint32 *) ctx->in); |
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byteReverse ((unsigned char *) ctx->buf, 4); |
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memcpy (digest, ctx->buf, 16); |
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memset (ctx, 0, sizeof (ctx)); /* In case it's sensitive */ |
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167 |
} |
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168 |
|
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169 |
|
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170 |
/* The four core functions - F1 is optimized somewhat */ |
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171 |
|
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172 |
/* #define F1(x, y, z) (x & y | ~x & z) */ |
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#define F1(x, y, z) (z ^ (x & (y ^ z))) |
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#define F2(x, y, z) F1(z, x, y) |
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#define F3(x, y, z) (x ^ y ^ z) |
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#define F4(x, y, z) (y ^ (x | ~z)) |
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177 |
|
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/* This is the central step in the MD5 algorithm. */ |
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#define MD5STEP(f, w, x, y, z, data, s) \ |
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( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) |
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181 |
|
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/* |
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* The core of the MD5 algorithm, this alters an existing MD5 hash to |
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* reflect the addition of 16 longwords of new data. MD5Update blocks |
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* the data and converts bytes into longwords for this routine. |
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186 |
*/ |
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187 |
void |
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188 |
MD5Transform (buf, in) |
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189 |
uint32 buf[4]; |
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190 |
uint32 in[16]; |
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191 |
{ |
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192 |
register uint32 a, b, c, d; |
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193 |
|
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194 |
a = buf[0]; |
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195 |
b = buf[1]; |
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c = buf[2]; |
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d = buf[3]; |
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198 |
|
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199 |
MD5STEP (F1, a, b, c, d, in[0] + 0xd76aa478, 7); |
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200 |
MD5STEP (F1, d, a, b, c, in[1] + 0xe8c7b756, 12); |
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201 |
MD5STEP (F1, c, d, a, b, in[2] + 0x242070db, 17); |
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202 |
MD5STEP (F1, b, c, d, a, in[3] + 0xc1bdceee, 22); |
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203 |
MD5STEP (F1, a, b, c, d, in[4] + 0xf57c0faf, 7); |
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204 |
MD5STEP (F1, d, a, b, c, in[5] + 0x4787c62a, 12); |
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205 |
MD5STEP (F1, c, d, a, b, in[6] + 0xa8304613, 17); |
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206 |
MD5STEP (F1, b, c, d, a, in[7] + 0xfd469501, 22); |
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207 |
MD5STEP (F1, a, b, c, d, in[8] + 0x698098d8, 7); |
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208 |
MD5STEP (F1, d, a, b, c, in[9] + 0x8b44f7af, 12); |
567bb019e3e3
Revision: 201010
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diff
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|
209 |
MD5STEP (F1, c, d, a, b, in[10] + 0xffff5bb1, 17); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
210 |
MD5STEP (F1, b, c, d, a, in[11] + 0x895cd7be, 22); |
567bb019e3e3
Revision: 201010
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diff
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|
211 |
MD5STEP (F1, a, b, c, d, in[12] + 0x6b901122, 7); |
567bb019e3e3
Revision: 201010
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diff
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|
212 |
MD5STEP (F1, d, a, b, c, in[13] + 0xfd987193, 12); |
567bb019e3e3
Revision: 201010
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diff
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|
213 |
MD5STEP (F1, c, d, a, b, in[14] + 0xa679438e, 17); |
567bb019e3e3
Revision: 201010
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parents:
diff
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|
214 |
MD5STEP (F1, b, c, d, a, in[15] + 0x49b40821, 22); |
567bb019e3e3
Revision: 201010
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diff
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|
215 |
|
567bb019e3e3
Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
216 |
MD5STEP (F2, a, b, c, d, in[1] + 0xf61e2562, 5); |
567bb019e3e3
Revision: 201010
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diff
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|
217 |
MD5STEP (F2, d, a, b, c, in[6] + 0xc040b340, 9); |
567bb019e3e3
Revision: 201010
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parents:
diff
changeset
|
218 |
MD5STEP (F2, c, d, a, b, in[11] + 0x265e5a51, 14); |
567bb019e3e3
Revision: 201010
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parents:
diff
changeset
|
219 |
MD5STEP (F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); |
567bb019e3e3
Revision: 201010
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diff
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|
220 |
MD5STEP (F2, a, b, c, d, in[5] + 0xd62f105d, 5); |
567bb019e3e3
Revision: 201010
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diff
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|
221 |
MD5STEP (F2, d, a, b, c, in[10] + 0x02441453, 9); |
567bb019e3e3
Revision: 201010
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parents:
diff
changeset
|
222 |
MD5STEP (F2, c, d, a, b, in[15] + 0xd8a1e681, 14); |
567bb019e3e3
Revision: 201010
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parents:
diff
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|
223 |
MD5STEP (F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); |
567bb019e3e3
Revision: 201010
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parents:
diff
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|
224 |
MD5STEP (F2, a, b, c, d, in[9] + 0x21e1cde6, 5); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
225 |
MD5STEP (F2, d, a, b, c, in[14] + 0xc33707d6, 9); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
226 |
MD5STEP (F2, c, d, a, b, in[3] + 0xf4d50d87, 14); |
567bb019e3e3
Revision: 201010
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diff
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|
227 |
MD5STEP (F2, b, c, d, a, in[8] + 0x455a14ed, 20); |
567bb019e3e3
Revision: 201010
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|
228 |
MD5STEP (F2, a, b, c, d, in[13] + 0xa9e3e905, 5); |
567bb019e3e3
Revision: 201010
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diff
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|
229 |
MD5STEP (F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
230 |
MD5STEP (F2, c, d, a, b, in[7] + 0x676f02d9, 14); |
567bb019e3e3
Revision: 201010
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parents:
diff
changeset
|
231 |
MD5STEP (F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); |
567bb019e3e3
Revision: 201010
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diff
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|
232 |
|
567bb019e3e3
Revision: 201010
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diff
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|
233 |
MD5STEP (F3, a, b, c, d, in[5] + 0xfffa3942, 4); |
567bb019e3e3
Revision: 201010
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parents:
diff
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|
234 |
MD5STEP (F3, d, a, b, c, in[8] + 0x8771f681, 11); |
567bb019e3e3
Revision: 201010
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parents:
diff
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|
235 |
MD5STEP (F3, c, d, a, b, in[11] + 0x6d9d6122, 16); |
567bb019e3e3
Revision: 201010
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diff
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|
236 |
MD5STEP (F3, b, c, d, a, in[14] + 0xfde5380c, 23); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
237 |
MD5STEP (F3, a, b, c, d, in[1] + 0xa4beea44, 4); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
238 |
MD5STEP (F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
239 |
MD5STEP (F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); |
567bb019e3e3
Revision: 201010
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diff
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|
240 |
MD5STEP (F3, b, c, d, a, in[10] + 0xbebfbc70, 23); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
241 |
MD5STEP (F3, a, b, c, d, in[13] + 0x289b7ec6, 4); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
242 |
MD5STEP (F3, d, a, b, c, in[0] + 0xeaa127fa, 11); |
567bb019e3e3
Revision: 201010
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diff
changeset
|
243 |
MD5STEP (F3, c, d, a, b, in[3] + 0xd4ef3085, 16); |
567bb019e3e3
Revision: 201010
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diff
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|
244 |
MD5STEP (F3, b, c, d, a, in[6] + 0x04881d05, 23); |
567bb019e3e3
Revision: 201010
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diff
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|
245 |
MD5STEP (F3, a, b, c, d, in[9] + 0xd9d4d039, 4); |
567bb019e3e3
Revision: 201010
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diff
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|
246 |
MD5STEP (F3, d, a, b, c, in[12] + 0xe6db99e5, 11); |
567bb019e3e3
Revision: 201010
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diff
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|
247 |
MD5STEP (F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); |
567bb019e3e3
Revision: 201010
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diff
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|
248 |
MD5STEP (F3, b, c, d, a, in[2] + 0xc4ac5665, 23); |
567bb019e3e3
Revision: 201010
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|
249 |
|
567bb019e3e3
Revision: 201010
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|
250 |
MD5STEP (F4, a, b, c, d, in[0] + 0xf4292244, 6); |
567bb019e3e3
Revision: 201010
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diff
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|
251 |
MD5STEP (F4, d, a, b, c, in[7] + 0x432aff97, 10); |
567bb019e3e3
Revision: 201010
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diff
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|
252 |
MD5STEP (F4, c, d, a, b, in[14] + 0xab9423a7, 15); |
567bb019e3e3
Revision: 201010
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diff
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|
253 |
MD5STEP (F4, b, c, d, a, in[5] + 0xfc93a039, 21); |
567bb019e3e3
Revision: 201010
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diff
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|
254 |
MD5STEP (F4, a, b, c, d, in[12] + 0x655b59c3, 6); |
567bb019e3e3
Revision: 201010
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|
255 |
MD5STEP (F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); |
567bb019e3e3
Revision: 201010
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diff
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|
256 |
MD5STEP (F4, c, d, a, b, in[10] + 0xffeff47d, 15); |
567bb019e3e3
Revision: 201010
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diff
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|
257 |
MD5STEP (F4, b, c, d, a, in[1] + 0x85845dd1, 21); |
567bb019e3e3
Revision: 201010
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parents:
diff
changeset
|
258 |
MD5STEP (F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); |
567bb019e3e3
Revision: 201010
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parents:
diff
changeset
|
259 |
MD5STEP (F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); |
567bb019e3e3
Revision: 201010
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diff
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|
260 |
MD5STEP (F4, c, d, a, b, in[6] + 0xa3014314, 15); |
567bb019e3e3
Revision: 201010
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diff
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|
261 |
MD5STEP (F4, b, c, d, a, in[13] + 0x4e0811a1, 21); |
567bb019e3e3
Revision: 201010
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diff
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|
262 |
MD5STEP (F4, a, b, c, d, in[4] + 0xf7537e82, 6); |
567bb019e3e3
Revision: 201010
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diff
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|
263 |
MD5STEP (F4, d, a, b, c, in[11] + 0xbd3af235, 10); |
567bb019e3e3
Revision: 201010
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diff
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|
264 |
MD5STEP (F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); |
567bb019e3e3
Revision: 201010
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parents:
diff
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|
265 |
MD5STEP (F4, b, c, d, a, in[9] + 0xeb86d391, 21); |
567bb019e3e3
Revision: 201010
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diff
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|
266 |
|
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Revision: 201010
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|
267 |
buf[0] += a; |
567bb019e3e3
Revision: 201010
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|
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buf[1] += b; |
567bb019e3e3
Revision: 201010
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|
269 |
buf[2] += c; |
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Revision: 201010
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|
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buf[3] += d; |
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Revision: 201010
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|
271 |
} |