mirror of
https://github.com/hashcat/hashcat.git
synced 2024-11-22 16:18:09 +00:00
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* XzCrc64Opt.c -- CRC64 calculation
|
|
2021-02-09 : Igor Pavlov : Public domain */
|
|
|
|
#include "Precomp.h"
|
|
|
|
#include "CpuArch.h"
|
|
|
|
#ifndef MY_CPU_BE
|
|
|
|
#define CRC64_UPDATE_BYTE_2(crc, b) (table[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8))
|
|
|
|
UInt64 MY_FAST_CALL XzCrc64UpdateT4(UInt64 v, const void *data, size_t size, const UInt64 *table);
|
|
UInt64 MY_FAST_CALL XzCrc64UpdateT4(UInt64 v, const void *data, size_t size, const UInt64 *table)
|
|
{
|
|
const Byte *p = (const Byte *)data;
|
|
for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++)
|
|
v = CRC64_UPDATE_BYTE_2(v, *p);
|
|
for (; size >= 4; size -= 4, p += 4)
|
|
{
|
|
UInt32 d = (UInt32)v ^ *(const UInt32 *)(const void *)p;
|
|
v = (v >> 32)
|
|
^ (table + 0x300)[((d ) & 0xFF)]
|
|
^ (table + 0x200)[((d >> 8) & 0xFF)]
|
|
^ (table + 0x100)[((d >> 16) & 0xFF)]
|
|
^ (table + 0x000)[((d >> 24))];
|
|
}
|
|
for (; size > 0; size--, p++)
|
|
v = CRC64_UPDATE_BYTE_2(v, *p);
|
|
return v;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
#ifndef MY_CPU_LE
|
|
|
|
#define CRC_UINT64_SWAP(v) \
|
|
((v >> 56) \
|
|
| ((v >> 40) & ((UInt64)0xFF << 8)) \
|
|
| ((v >> 24) & ((UInt64)0xFF << 16)) \
|
|
| ((v >> 8) & ((UInt64)0xFF << 24)) \
|
|
| ((v << 8) & ((UInt64)0xFF << 32)) \
|
|
| ((v << 24) & ((UInt64)0xFF << 40)) \
|
|
| ((v << 40) & ((UInt64)0xFF << 48)) \
|
|
| ((v << 56)))
|
|
|
|
#define CRC64_UPDATE_BYTE_2_BE(crc, b) (table[(Byte)((crc) >> 56) ^ (b)] ^ ((crc) << 8))
|
|
|
|
UInt64 MY_FAST_CALL XzCrc64UpdateT1_BeT4(UInt64 v, const void *data, size_t size, const UInt64 *table);
|
|
UInt64 MY_FAST_CALL XzCrc64UpdateT1_BeT4(UInt64 v, const void *data, size_t size, const UInt64 *table)
|
|
{
|
|
const Byte *p = (const Byte *)data;
|
|
table += 0x100;
|
|
v = CRC_UINT64_SWAP(v);
|
|
for (; size > 0 && ((unsigned)(ptrdiff_t)p & 3) != 0; size--, p++)
|
|
v = CRC64_UPDATE_BYTE_2_BE(v, *p);
|
|
for (; size >= 4; size -= 4, p += 4)
|
|
{
|
|
UInt32 d = (UInt32)(v >> 32) ^ *(const UInt32 *)(const void *)p;
|
|
v = (v << 32)
|
|
^ (table + 0x000)[((d ) & 0xFF)]
|
|
^ (table + 0x100)[((d >> 8) & 0xFF)]
|
|
^ (table + 0x200)[((d >> 16) & 0xFF)]
|
|
^ (table + 0x300)[((d >> 24))];
|
|
}
|
|
for (; size > 0; size--, p++)
|
|
v = CRC64_UPDATE_BYTE_2_BE(v, *p);
|
|
return CRC_UINT64_SWAP(v);
|
|
}
|
|
|
|
#endif
|