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875988 |
/*
|
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875988 |
* This code implements the MD5 message-digest algorithm.
|
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Packit |
875988 |
* The algorithm is due to Ron Rivest. This code was
|
|
Packit |
875988 |
* written by Colin Plumb in 1993, no copyright is claimed.
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|
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875988 |
* This code is in the public domain; do with it what you wish.
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875988 |
*
|
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875988 |
* Equivalent code is available from RSA Data Security, Inc.
|
|
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875988 |
* This code has been tested against that, and is equivalent,
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875988 |
* except that you don't need to include two pages of legalese
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875988 |
* with every copy.
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875988 |
*
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875988 |
* To compute the message digest of a chunk of bytes, declare an
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875988 |
* MD5Context structure, pass it to MD5Init, call MD5Update as
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|
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875988 |
* needed on buffers full of bytes, and then call MD5Final, which
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875988 |
* will fill a supplied 16-byte array with the digest.
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875988 |
*/
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875988 |
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875988 |
/* Based on OpenBSD modifications */
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875988 |
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875988 |
#include "md5.h"
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875988 |
#include "mhd_byteorder.h"
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875988 |
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875988 |
#define PUT_64BIT_LE(cp, value) do { \
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875988 |
(cp)[7] = (uint8_t)((value) >> 56); \
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875988 |
(cp)[6] = (uint8_t)((value) >> 48); \
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875988 |
(cp)[5] = (uint8_t)((value) >> 40); \
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875988 |
(cp)[4] = (uint8_t)((value) >> 32); \
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875988 |
(cp)[3] = (uint8_t)((value) >> 24); \
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875988 |
(cp)[2] = (uint8_t)((value) >> 16); \
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875988 |
(cp)[1] = (uint8_t)((value) >> 8); \
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875988 |
(cp)[0] = (uint8_t)((value)); } while (0)
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875988 |
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875988 |
#define PUT_32BIT_LE(cp, value) do { \
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875988 |
(cp)[3] = (uint8_t)((value) >> 24); \
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875988 |
(cp)[2] = (uint8_t)((value) >> 16); \
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875988 |
(cp)[1] = (uint8_t)((value) >> 8); \
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875988 |
(cp)[0] = (uint8_t)((value)); } while (0)
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875988 |
|
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875988 |
static uint8_t PADDING[MD5_BLOCK_SIZE] = {
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875988 |
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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875988 |
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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875988 |
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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875988 |
};
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875988 |
|
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875988 |
/*
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|
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875988 |
* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
|
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875988 |
* initialization constants.
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875988 |
*/
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875988 |
void
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875988 |
MD5Init(struct MD5Context *ctx)
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875988 |
{
|
|
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875988 |
if (!ctx)
|
|
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875988 |
return;
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|
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875988 |
|
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875988 |
ctx->count = 0;
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|
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875988 |
ctx->state[0] = 0x67452301;
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|
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875988 |
ctx->state[1] = 0xefcdab89;
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|
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875988 |
ctx->state[2] = 0x98badcfe;
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|
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875988 |
ctx->state[3] = 0x10325476;
|
|
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875988 |
}
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|
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875988 |
|
|
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875988 |
/*
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875988 |
* Update context to reflect the concatenation of another buffer full
|
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875988 |
* of bytes.
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|
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875988 |
*/
|
|
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875988 |
void
|
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875988 |
MD5Update(struct MD5Context *ctx, const unsigned char *input, size_t len)
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|
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875988 |
{
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875988 |
size_t have, need;
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875988 |
|
|
Packit |
875988 |
if (!ctx || !input)
|
|
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875988 |
return;
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|
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875988 |
|
|
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875988 |
/* Check how many bytes we already have and how many more we need. */
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|
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875988 |
have = (size_t)((ctx->count >> 3) & (MD5_BLOCK_SIZE - 1));
|
|
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875988 |
need = MD5_BLOCK_SIZE - have;
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|
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875988 |
|
|
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875988 |
/* Update bitcount */
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|
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875988 |
ctx->count += (uint64_t)len << 3;
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|
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875988 |
|
|
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875988 |
if (len >= need)
|
|
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875988 |
{
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|
Packit |
875988 |
if (have != 0)
|
|
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875988 |
{
|
|
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875988 |
memcpy(ctx->buffer + have, input, need);
|
|
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875988 |
MD5Transform(ctx->state, ctx->buffer);
|
|
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875988 |
input += need;
|
|
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875988 |
len -= need;
|
|
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875988 |
have = 0;
|
|
Packit |
875988 |
}
|
|
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875988 |
|
|
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875988 |
/* Process data in MD5_BLOCK_SIZE-byte chunks. */
|
|
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875988 |
while (len >= MD5_BLOCK_SIZE)
|
|
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875988 |
{
|
|
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875988 |
MD5Transform(ctx->state, input);
|
|
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875988 |
input += MD5_BLOCK_SIZE;
|
|
Packit |
875988 |
len -= MD5_BLOCK_SIZE;
|
|
Packit |
875988 |
}
|
|
Packit |
875988 |
}
|
|
Packit |
875988 |
|
|
Packit |
875988 |
/* Handle any remaining bytes of data. */
|
|
Packit |
875988 |
if (len != 0)
|
|
Packit |
875988 |
memcpy(ctx->buffer + have, input, len);
|
|
Packit |
875988 |
}
|
|
Packit |
875988 |
|
|
Packit |
875988 |
/*
|
|
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875988 |
* Pad pad to 64-byte boundary with the bit pattern
|
|
Packit |
875988 |
* 1 0* (64-bit count of bits processed, MSB-first)
|
|
Packit |
875988 |
*/
|
|
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875988 |
void
|
|
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875988 |
MD5Pad(struct MD5Context *ctx)
|
|
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875988 |
{
|
|
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875988 |
uint8_t count[8];
|
|
Packit |
875988 |
size_t padlen;
|
|
Packit |
875988 |
|
|
Packit |
875988 |
if (!ctx)
|
|
Packit |
875988 |
return;
|
|
Packit |
875988 |
|
|
Packit |
875988 |
/* Convert count to 8 bytes in little endian order. */
|
|
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875988 |
PUT_64BIT_LE(count, ctx->count);
|
|
Packit |
875988 |
|
|
Packit |
875988 |
/* Pad out to 56 mod 64. */
|
|
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875988 |
padlen = MD5_BLOCK_SIZE -
|
|
Packit |
875988 |
((ctx->count >> 3) & (MD5_BLOCK_SIZE - 1));
|
|
Packit |
875988 |
if (padlen < 1 + 8)
|
|
Packit |
875988 |
padlen += MD5_BLOCK_SIZE;
|
|
Packit |
875988 |
MD5Update(ctx, PADDING, padlen - 8); /* padlen - 8 <= 64 */
|
|
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875988 |
MD5Update(ctx, count, 8);
|
|
Packit |
875988 |
}
|
|
Packit |
875988 |
|
|
Packit |
875988 |
/*
|
|
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875988 |
* Final wrapup--call MD5Pad, fill in digest and zero out ctx.
|
|
Packit |
875988 |
*/
|
|
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875988 |
void
|
|
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875988 |
MD5Final(unsigned char digest[MD5_DIGEST_SIZE], struct MD5Context *ctx)
|
|
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875988 |
{
|
|
Packit |
875988 |
int i;
|
|
Packit |
875988 |
|
|
Packit |
875988 |
if (!ctx || !digest)
|
|
Packit |
875988 |
return;
|
|
Packit |
875988 |
|
|
Packit |
875988 |
MD5Pad(ctx);
|
|
Packit |
875988 |
for (i = 0; i < 4; i++)
|
|
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875988 |
PUT_32BIT_LE(digest + i * 4, ctx->state[i]);
|
|
Packit |
875988 |
|
|
Packit |
875988 |
memset(ctx, 0, sizeof(*ctx));
|
|
Packit |
875988 |
}
|
|
Packit |
875988 |
|
|
Packit |
875988 |
|
|
Packit |
875988 |
/* The four core functions - F1 is optimized somewhat */
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875988 |
|
|
Packit |
875988 |
/* #define F1(x, y, z) (x & y | ~x & z) */
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|
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875988 |
#define F1(x, y, z) (z ^ (x & (y ^ z)))
|
|
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875988 |
#define F2(x, y, z) F1(z, x, y)
|
|
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875988 |
#define F3(x, y, z) (x ^ y ^ z)
|
|
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875988 |
#define F4(x, y, z) (y ^ (x | ~z))
|
|
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875988 |
|
|
Packit |
875988 |
/* This is the central step in the MD5 algorithm. */
|
|
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875988 |
#define MD5STEP(f, w, x, y, z, data, s) \
|
|
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875988 |
( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
|
|
Packit |
875988 |
|
|
Packit |
875988 |
/*
|
|
Packit |
875988 |
* The core of the MD5 algorithm, this alters an existing MD5 hash to
|
|
Packit |
875988 |
* reflect the addition of 16 longwords of new data. MD5Update blocks
|
|
Packit |
875988 |
* the data and converts bytes into longwords for this routine.
|
|
Packit |
875988 |
*/
|
|
Packit |
875988 |
void
|
|
Packit |
875988 |
MD5Transform(uint32_t state[4], const uint8_t block[MD5_BLOCK_SIZE])
|
|
Packit |
875988 |
{
|
|
Packit |
875988 |
uint32_t a, b, c, d, in[MD5_BLOCK_SIZE / 4];
|
|
Packit |
875988 |
|
|
Packit |
875988 |
#if _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
|
|
Packit |
875988 |
memcpy(in, block, sizeof(in));
|
|
Packit |
875988 |
#else
|
|
Packit |
875988 |
for (a = 0; a < MD5_BLOCK_SIZE / 4; a++)
|
|
Packit |
875988 |
{
|
|
Packit |
875988 |
in[a] = (uint32_t)(
|
|
Packit |
875988 |
(uint32_t)(block[a * 4 + 0]) |
|
|
Packit |
875988 |
(uint32_t)(block[a * 4 + 1]) << 8 |
|
|
Packit |
875988 |
(uint32_t)(block[a * 4 + 2]) << 16 |
|
|
Packit |
875988 |
(uint32_t)(block[a * 4 + 3]) << 24);
|
|
Packit |
875988 |
}
|
|
Packit |
875988 |
#endif
|
|
Packit |
875988 |
|
|
Packit |
875988 |
a = state[0];
|
|
Packit |
875988 |
b = state[1];
|
|
Packit |
875988 |
c = state[2];
|
|
Packit |
875988 |
d = state[3];
|
|
Packit |
875988 |
|
|
Packit |
875988 |
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
|
|
Packit |
875988 |
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
|
|
Packit |
875988 |
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
|
|
Packit |
875988 |
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
|
|
Packit |
875988 |
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
|
|
Packit |
875988 |
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
|
|
Packit |
875988 |
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
|
|
Packit |
875988 |
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
|
|
Packit |
875988 |
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
|
|
Packit |
875988 |
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
|
|
Packit |
875988 |
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
|
|
Packit |
875988 |
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
|
|
Packit |
875988 |
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
|
|
Packit |
875988 |
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
|
|
Packit |
875988 |
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
|
|
Packit |
875988 |
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
|
|
Packit |
875988 |
|
|
Packit |
875988 |
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
|
|
Packit |
875988 |
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
|
|
Packit |
875988 |
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
|
|
Packit |
875988 |
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
|
|
Packit |
875988 |
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
|
|
Packit |
875988 |
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
|
|
Packit |
875988 |
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
|
|
Packit |
875988 |
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
|
|
Packit |
875988 |
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
|
|
Packit |
875988 |
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
|
|
Packit |
875988 |
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
|
|
Packit |
875988 |
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
|
|
Packit |
875988 |
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
|
|
Packit |
875988 |
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
|
|
Packit |
875988 |
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
|
|
Packit |
875988 |
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
|
|
Packit |
875988 |
|
|
Packit |
875988 |
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
|
|
Packit |
875988 |
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
|
|
Packit |
875988 |
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
|
|
Packit |
875988 |
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
|
|
Packit |
875988 |
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
|
|
Packit |
875988 |
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
|
|
Packit |
875988 |
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
|
|
Packit |
875988 |
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
|
|
Packit |
875988 |
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
|
|
Packit |
875988 |
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
|
|
Packit |
875988 |
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
|
|
Packit |
875988 |
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
|
|
Packit |
875988 |
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
|
|
Packit |
875988 |
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
|
|
Packit |
875988 |
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
|
|
Packit |
875988 |
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
|
|
Packit |
875988 |
|
|
Packit |
875988 |
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
|
|
Packit |
875988 |
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
|
|
Packit |
875988 |
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
|
|
Packit |
875988 |
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
|
|
Packit |
875988 |
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
|
|
Packit |
875988 |
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
|
|
Packit |
875988 |
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
|
|
Packit |
875988 |
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
|
|
Packit |
875988 |
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
|
|
Packit |
875988 |
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
|
|
Packit |
875988 |
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
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Packit |
875988 |
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
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Packit |
875988 |
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
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Packit |
875988 |
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
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|
Packit |
875988 |
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
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|
Packit |
875988 |
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
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|
Packit |
875988 |
|
|
Packit |
875988 |
state[0] += a;
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|
Packit |
875988 |
state[1] += b;
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|
Packit |
875988 |
state[2] += c;
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|
Packit |
875988 |
state[3] += d;
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|
Packit |
875988 |
}
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|
Packit |
875988 |
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|
Packit |
875988 |
/* end of md5.c */
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