#include "ckconfig.h"
#if CRYPTKIT_MD5_ENABLE && !CRYPTKIT_LIBMD_DIGEST
#include "ckMD5.h"
#include "platform.h"
#include "byteRep.h"
#include <stdlib.h>
#define MD5_DEBUG 0
#if MD5_DEBUG
static inline void dumpCtx(MD5Context *ctx, char *label)
{
int i;
printf("%s\n", label);
printf("buf = ");
for(i=0; i<4; i++) {
printf("%x:", ctx->buf[i]);
}
printf("\nbits: %d:%d\n", ctx->bits[0], ctx->bits[1]);
printf("in[]:\n ");
for(i=0; i<64; i++) {
printf("%02x:", ctx->in[i]);
if((i % 16) == 15) {
printf("\n ");
}
}
printf("\n");
}
#else // MD5_DEBUG
#define dumpCtx(ctx, label)
#endif // MD5_DEBUG
static void MD5Transform(UINT32 buf[4], UINT32 const in[16]);
#if __LITTLE_ENDIAN__
#define byteReverse(buf, len)
#else
static void byteReverse(unsigned char *buf, unsigned longs);
#ifndef ASM_MD5
static void byteReverse(unsigned char *buf, unsigned longs)
{
#if old_way
UINT32 t;
do {
t = (UINT32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
((unsigned) buf[1] << 8 | buf[0]);
*(UINT32 *) buf = t;
buf += 4;
} while (--longs);
#else // new_way
unsigned char t;
do {
t = buf[0];
buf[0] = buf[3];
buf[3] = t;
t = buf[1];
buf[1] = buf[2];
buf[2] = t;
buf += 4;
} while (--longs);
#endif // old_way
}
#endif // ASM_MD5
#endif // __LITTLE_ENDIAN__
void MD5Init(MD5Context *ctx)
{
ctx->buf[0] = 0x67452301;
ctx->buf[1] = 0xefcdab89;
ctx->buf[2] = 0x98badcfe;
ctx->buf[3] = 0x10325476;
ctx->bits[0] = 0;
ctx->bits[1] = 0;
}
void MD5Update(MD5Context *ctx, unsigned char const *buf, unsigned len)
{
UINT32 t;
dumpCtx(ctx, "MD5.c update top");
t = ctx->bits[0];
if ((ctx->bits[0] = t + ((UINT32) len << 3)) < t)
ctx->bits[1]++;
ctx->bits[1] += len >> 29;
t = (t >> 3) & 0x3f;
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);
dumpCtx(ctx, "update - return from transform (1)");
buf += t;
len -= t;
}
while (len >= 64) {
memcpy(ctx->in, buf, 64);
byteReverse(ctx->in, 16);
MD5Transform(ctx->buf, (UINT32 *) ctx->in);
dumpCtx(ctx, "update - return from transform (2)");
buf += 64;
len -= 64;
}
memcpy(ctx->in, buf, len);
}
void MD5Final(MD5Context *ctx, unsigned char *digest)
{
unsigned count;
unsigned char *p;
dumpCtx(ctx, "final top");
count = (ctx->bits[0] >> 3) & 0x3F;
p = ctx->in + count;
*p++ = 0x80;
#if MD5_DEBUG
printf("in[%d] = %x\n", count, ctx->in[count]);
#endif
count = 64 - 1 - count;
dumpCtx(ctx, "final, before pad");
if (count < 8) {
bzero(p, count);
byteReverse(ctx->in, 16);
MD5Transform(ctx->buf, (UINT32 *) ctx->in);
bzero(ctx->in, 56);
} else {
bzero(p, count - 8);
}
byteReverse(ctx->in, 14);
#if old_way
((UINT32 *) ctx->in)[14] = ctx->bits[0];
((UINT32 *) ctx->in)[15] = ctx->bits[1];
#else intToByteRep(ctx->bits[0], &ctx->in[56]);
intToByteRep(ctx->bits[1], &ctx->in[60]);
#endif
dumpCtx(ctx, "last transform");
MD5Transform(ctx->buf, (UINT32 *) ctx->in);
byteReverse((unsigned char *) ctx->buf, 4);
memcpy(digest, ctx->buf, MD5_DIGEST_SIZE);
dumpCtx(ctx, "final end");
bzero(ctx, sizeof(*ctx));
}
#ifndef ASM_MD5
#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 = w<<s | w>>(32-s), w += x )
static void MD5Transform(UINT32 buf[4], UINT32 const in[16])
{
register UINT32 a, b, c, d;
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;
}
#endif
#endif