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Fix endianness-sensitivity

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pooler 2011-12-29 19:03:18 +01:00
parent 703d58cd82
commit 31c3074537
1 changed files with 56 additions and 23 deletions
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79
scrypt.c
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@ -1,5 +1,5 @@
/*-
* Copyright 2009 Colin Percival, 2011 ArtForz
* Copyright 2009 Colin Percival, 2011 ArtForz, 2011 pooler
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -36,24 +36,56 @@
#define byteswap(x) ((((x) << 24) & 0xff000000u) | (((x) << 8) & 0x00ff0000u) | (((x) >> 8) & 0x0000ff00u) | (((x) >> 24) & 0x000000ffu))
typedef struct SHA256Context {
uint32_t state[8];
uint32_t buf[16];
} SHA256_CTX;
/*
* Encode a length len vector of (uint32_t) into a length len vector of
* (unsigned char) in big-endian form.
*/
static inline void
be32enc_vect(uint32_t *dst, const uint32_t *src, uint32_t len)
byteswap_vec(uint32_t *dest, const uint32_t *src, uint32_t len)
{
uint32_t i;
for (i = 0; i < len; i++)
dst[i] = byteswap(src[i]);
dest[i] = byteswap(src[i]);
}
static inline uint32_t be32dec(const void *pp)
{
const uint8_t *p = (uint8_t const *)pp;
return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) +
((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24));
}
static inline void be32enc(void *pp, uint32_t x)
{
uint8_t * p = (uint8_t *)pp;
p[3] = x & 0xff;
p[2] = (x >> 8) & 0xff;
p[1] = (x >> 16) & 0xff;
p[0] = (x >> 24) & 0xff;
}
static inline uint32_t le32dec(const void *pp)
{
const uint8_t *p = (uint8_t const *)pp;
return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) +
((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24));
}
static inline void le32enc(void *pp, uint32_t x)
{
uint8_t * p = (uint8_t *)pp;
p[0] = x & 0xff;
p[1] = (x >> 8) & 0xff;
p[2] = (x >> 16) & 0xff;
p[3] = (x >> 24) & 0xff;
}
typedef struct SHA256Context {
uint32_t state[8];
uint32_t buf[16];
} SHA256_CTX;
/* Elementary functions used by SHA256 */
#define Ch(x, y, z) ((x & (y ^ z)) ^ z)
#define Maj(x, y, z) ((x & (y | z)) | (y & z))
@ -93,8 +125,7 @@ SHA256_Transform(uint32_t * state, const uint32_t block[16], int swap)
/* 1. Prepare message schedule W. */
if(swap)
for (i = 0; i < 16; i++)
W[i] = byteswap(block[i]);
byteswap_vec(W, block, 16);
else
memcpy(W, block, 64);
for (i = 16; i < 64; i += 2) {
@ -241,8 +272,8 @@ PBKDF2_SHA256_80_128(const uint32_t *tstate, const uint32_t *ostate, const uint3
memcpy(PShoctx.buf+8, outerpad, 32);
SHA256_Transform(PShictx.state, passwd, 1);
be32enc_vect(PShictx.buf, passwd+16, 4);
be32enc_vect(PShictx.buf+5, innerpad, 11);
byteswap_vec(PShictx.buf, passwd+16, 4);
byteswap_vec(PShictx.buf+5, innerpad, 11);
/* Iterate through the blocks. */
for (i = 0; i < 4; i++) {
@ -256,7 +287,7 @@ PBKDF2_SHA256_80_128(const uint32_t *tstate, const uint32_t *ostate, const uint3
memcpy(ost, PShoctx.state, 32);
SHA256_Transform(ost, PShoctx.buf, 0);
be32enc_vect(buf+i*8, ost, 8);
byteswap_vec(buf+i*8, ost, 8);
}
}
@ -451,24 +482,26 @@ int scanhash_scrypt(int thr_id, unsigned char *pdata, unsigned char *scratchbuf,
int use_dual;
#endif
uint32_t n = 0;
uint32_t Htarg = ((const uint32_t *)ptarget)[7];
uint32_t Htarg = le32dec(&((const uint32_t *)ptarget)[7]);
int i;
work_restart[thr_id].restart = 0;
be32enc_vect(data, (const uint32_t *)pdata, 19);
for (i = 0; i < 19; i++)
data[i] = be32dec(&((const uint32_t *)pdata)[i]);
#ifdef DUAL_SCRYPT
memcpy(data2, data, 80);
memcpy(data2, data, 76);
use_dual = prefer_dual_scrypt();
#endif
while (1) {
data[19] = n++;
#ifdef DUAL_SCRYPT
if (use_dual) {
if (use_dual && n < max_nonce) {
data2[19] = n++;
dual_scrypt_1024_1_1_256_sp(data, data2, hash, hash2, scratchbuf);
if (hash2[7] <= Htarg) {
((uint32_t *)pdata)[19] = byteswap(data2[19]);
be32enc(&((uint32_t *)pdata)[19], data2[19]);
*hashes_done = n;
return true;
}
@ -480,7 +513,7 @@ int scanhash_scrypt(int thr_id, unsigned char *pdata, unsigned char *scratchbuf,
#endif
if (hash[7] <= Htarg) {
((uint32_t *)pdata)[19] = byteswap(data[19]);
be32enc(&((uint32_t *)pdata)[19], data[19]);
*hashes_done = n;
return true;
}