-/*
- * This code implements the MD5 message-digest algorithm.
+/* This code implements the MD5 message-digest algorithm.
* The algorithm is due to Ron Rivest. This code was
* written by Colin Plumb in 1993, no copyright is claimed.
* This code is in the public domain; do with it what you wish.
* will fill a supplied 16-byte array with the digest.
*/
-#include <string.h> /* for memcpy() */
+#include <string.h>
#include <sys/param.h>
#include "md5.h"
/* Checking for endiannes */
#ifdef __BYTE_ORDER
#if __BYTE_ORDER == __BIG_ENDIAN
- #define HIGHFIRST
+#define HIGHFIRST
#endif /* BIG ENDIAN */
#endif /* byte order */
-
#ifndef HIGHFIRST
-#define byteReverse(buf, len) /* Nothing */
+#define byteReverse(buf, len) /* Nothing */
#else
void byteReverse(unsigned char *buf, unsigned longs);
+
#ifndef ASM_MD5
-/*
- * Note: this code is harmless on little-endian machines.
- */
+/* Note: this code is harmless on little-endian machines */
void byteReverse(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;
+ t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
+ ((unsigned) buf[1] << 8 | buf[0]);
+ *(uint32 *) buf = t;
+ buf += 4;
} while (--longs);
}
#endif
#endif
-/*
- * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+/* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
* initialization constants.
*/
void MD5Init(struct MD5Context *ctx)
ctx->bits[1] = 0;
}
-/*
- * Update context to reflect the concatenation of another buffer full
- * of bytes.
- */
+/* Update context to reflect the concatenation of another buffer full of bytes */
void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len)
{
uint32 t;
/* Update bitcount */
-
t = ctx->bits[0];
- if ((ctx->bits[0] = t + ((uint32) len << 3)) < t)
- ctx->bits[1]++; /* Carry from low to high */
+ if ((ctx->bits[0] = t + ((uint32) len << 3)) < t) {
+ ctx->bits[1]++; /* Carry from low to high */
+ }
ctx->bits[1] += len >> 29;
- t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
+ t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
/* Handle any leading odd-sized chunks */
-
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;
+ 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;
}
- /* Process data in 64-byte chunks */
+ /* Process data in 64-byte chunks */
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, 64);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (uint32 *) ctx->in);
+ buf += 64;
+ len -= 64;
}
- /* Handle any remaining bytes of data. */
-
+ /* Handle any remaining bytes of data */
memcpy(ctx->in, buf, len);
}
/* Compute number of bytes mod 64 */
count = (ctx->bits[0] >> 3) & 0x3F;
- /* Set the first char of padding to 0x80. This is safe since there is
- always at least one byte free */
+ /* Set the first char of padding to 0x80. This is safe since there is
+ * always at least one byte free
+ */
p = ctx->in + count;
*p++ = 0x80;
/* Pad out to 56 mod 64 */
if (count < 8) {
- /* Two lots of padding: Pad the first block to 64 bytes */
- memset(p, 0, count);
- byteReverse(ctx->in, 16);
- MD5Transform(ctx->buf, (uint32 *) ctx->in);
+ /* Two lots of padding: Pad the first block to 64 bytes */
+ memset(p, 0, count);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (uint32 *) ctx->in);
- /* Now fill the next block with 56 bytes */
- memset(ctx->in, 0, 56);
+ /* Now fill the next block with 56 bytes */
+ memset(ctx->in, 0, 56);
} else {
- /* Pad block to 56 bytes */
- memset(p, 0, count - 8);
+ /* Pad block to 56 bytes */
+ memset(p, 0, count - 8);
}
byteReverse(ctx->in, 14);
/* Append length in bits and transform */
- ((uint32 *) ctx->in)[14] = ctx->bits[0];
- ((uint32 *) ctx->in)[15] = ctx->bits[1];
+ ctx->in32[14] = ctx->bits[0];
+ ctx->in32[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)); /* In case it's sensitive */
+ memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
}
#ifndef ASM_MD5
#define F3(x, y, z) (x ^ y ^ z)
#define F4(x, y, z) (y ^ (x | ~z))
-/* This is the central step in the MD5 algorithm. */
+/* This is the central step in the MD5 algorithm */
#define MD5STEP(f, w, x, y, z, data, s) \
- ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
+ ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
/*
* The core of the MD5 algorithm, this alters an existing MD5 hash to
}
#endif
+
projects / ossec-hids.git / blobdiff