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openldap  2.4.31
Defines | Functions
md5.c File Reference
#include "portable.h"
#include <ac/string.h>
#include <ac/socket.h>
#include <lutil_md5.h>

Go to the source code of this file.

Defines

#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 &= 0xffffffff, w = w<<s | w>>(32-s), w += x )

Functions

static ber_uint_t getu32 (const unsigned char *addr)
static void putu32 (ber_uint_t data, unsigned char *addr)
void lutil_MD5Init (struct lutil_MD5Context *ctx)
void lutil_MD5Update (struct lutil_MD5Context *ctx, const unsigned char *buf, ber_len_t len)
void lutil_MD5Final (unsigned char *digest, struct lutil_MD5Context *ctx)
void lutil_MD5Transform (ber_uint_t *buf, const unsigned char *inraw)

Define Documentation

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

Definition at line 196 of file md5.c.

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

Definition at line 197 of file md5.c.

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

Definition at line 198 of file md5.c.

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

Definition at line 199 of file md5.c.

#define MD5STEP (   f,
  w,
  x,
  y,
  z,
  data,
  s 
)    ( w += f(x, y, z) + data, w &= 0xffffffff, w = w<<s | w>>(32-s), w += x )

Definition at line 202 of file md5.c.


Function Documentation

static ber_uint_t getu32 ( const unsigned char *  addr) [static]

Definition at line 62 of file md5.c.

{
       return (((((unsigned long)addr[3] << 8) | addr[2]) << 8)
              | addr[1]) << 8 | addr[0];
}

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void lutil_MD5Final ( unsigned char *  digest,
struct lutil_MD5Context ctx 
)

Definition at line 150 of file md5.c.

{
       unsigned count;
       unsigned char *p;

       /* 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 */
       p = ctx->in + count;
       *p++ = 0x80;

       /* Bytes of padding needed to make 64 bytes */
       count = 64 - 1 - count;

       /* Pad out to 56 mod 64 */
       if (count < 8) {
              /* Two lots of padding:  Pad the first block to 64 bytes */
              memset(p, '\0', count);
              lutil_MD5Transform(ctx->buf, ctx->in);

              /* Now fill the next block with 56 bytes */
              memset(ctx->in, '\0', 56);
       } else {
              /* Pad block to 56 bytes */
              memset(p, '\0', count-8);
       }

       /* Append length in bits and transform */
       putu32(ctx->bits[0], ctx->in + 56);
       putu32(ctx->bits[1], ctx->in + 60);

       lutil_MD5Transform(ctx->buf, ctx->in);
       putu32(ctx->buf[0], digest);
       putu32(ctx->buf[1], digest + 4);
       putu32(ctx->buf[2], digest + 8);
       putu32(ctx->buf[3], digest + 12);
       memset(ctx, '\0', sizeof(*ctx));   /* In case it's sensitive */
}

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void lutil_MD5Init ( struct lutil_MD5Context ctx)

Definition at line 82 of file md5.c.

{
       ctx->buf[0] = 0x67452301;
       ctx->buf[1] = 0xefcdab89;
       ctx->buf[2] = 0x98badcfe;
       ctx->buf[3] = 0x10325476;

       ctx->bits[0] = 0;
       ctx->bits[1] = 0;
}

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void lutil_MD5Transform ( ber_uint_t *  buf,
const unsigned char *  inraw 
)

Definition at line 211 of file md5.c.

{
       register ber_uint_t a, b, c, d;
       ber_uint_t in[16];
       int i;

       for (i = 0; i < 16; ++i)
              in[i] = getu32 (inraw + 4 * i);

       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;
}

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void lutil_MD5Update ( struct lutil_MD5Context ctx,
const unsigned char *  buf,
ber_len_t  len 
)

Definition at line 98 of file md5.c.

{
       ber_uint_t t;

       /* Update bitcount */

       t = ctx->bits[0];
       if ((ctx->bits[0] = (t + ((ber_uint_t)len << 3)) & 0xffffffff) < t)
              ctx->bits[1]++;      /* Carry from low to high */
       ctx->bits[1] += len >> 29;

       t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */

       /* Handle any leading odd-sized chunks */

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

              t = 64-t;
              if (len < t) {
                     AC_MEMCPY(p, buf, len);
                     return;
              }
              AC_MEMCPY(p, buf, t);
              lutil_MD5Transform(ctx->buf, ctx->in);
              buf += t;
              len -= t;
       }

       /* Process data in 64-byte chunks */

       while (len >= 64) {
              AC_MEMCPY(ctx->in, buf, 64);
              lutil_MD5Transform(ctx->buf, ctx->in);
              buf += 64;
              len -= 64;
       }

       /* Handle any remaining bytes of data. */

       AC_MEMCPY(ctx->in, buf, len);
}

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static void putu32 ( ber_uint_t  data,
unsigned char *  addr 
) [static]

Definition at line 69 of file md5.c.

{
       addr[0] = (unsigned char)data;
       addr[1] = (unsigned char)(data >> 8);
       addr[2] = (unsigned char)(data >> 16);
       addr[3] = (unsigned char)(data >> 24);
}

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