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/*
* zipcrack.c - where the 'crack' routine is located
*/
/*
* guiding comments for gencrack.pl
*
* MTH cpmask init_cpmask crack_cpmask load_img
*
* LCL init_crack_pw crack_pw
* LOD load_zip
*
* ARC ARCH_i386
* DEF USE_MULT_TAB
* DEF TARGET_CPU 0 $ 5 $ 6
* DFT TARGET_CPU==COMPILE_CPU && USE_MULT_TAB
* DEP defined(__i386__) || defined(__i386) || defined(i386)
*
* DEF USE_MULT_TAB
* DFT USE_MULT_TAB
* DEP 1
*
* END
*/
#include "crc32.h"
#undef USE_GCC_X86_ASM
#define USE_GCC_X86_ASM (ARCH_i386 && USE_GCC_ASM && USE_MULT_TAB)
static void init_crack_pw (void)
{
#if USE_MULT_TAB
u16 t;
for (t = 0; t < 16384; t++)
mult_tab[t] = ((t*4+3) * (t*4+2) >> 8) & 0xff;
#endif
}
static int crack_pw (gen_func genfunc, callback_func cbfunc)
{
int changed = -1;
int crack_count = 0;
u32 key_stack[(MAX_PW+1) * 3] = { 0x12345678UL, 0x23456789UL, 0x34567890UL };
u32 *sp;
#if USE_GCC_X86_ASM
int dummy; /* dummy output. */
#endif
sp = 0; /* to calm down dumb compilers */
do
{
int count = file_count;
int count2 = 0;
u32 key0, key1, key2;
u8 *p;
u8 *b = files;
if (changed < 0)
{
changed = strlen (pw);
pw_end = pw + changed;
sp = key_stack + changed * 3;
}
sp -= changed * 3;
p = (u8 *)pw_end - changed;
if (++crack_count >= 1000000 && verbosity)
{
printf ("checking pw %-40.40s\r", pw), fflush (stdout);
crack_count = 0;
}
# if USE_GCC_X86_ASM && TARGET_CPU
asm(
" movl (%7),%0\n"
" movl 4(%7),%1\n"
" movl 8(%7),%2\n"
" xorl %3,%3\n"
" movb (%5),%b3\n"
"1: xorb %b0,%b3\n"
" shrl $8,%0\n"
" incl %5\n"
" xorl %c6(,%3,4),%0\n"
" movb %b0,%b3\n"
" addl $12,%7\n"
" movl %0,(%7)\n"
" addl %1,%3\n"
" imul $134775813,%3\n"
" leal 1(%3),%1\n"
" shrl $24,%3\n"
" movl %1,4(%7)\n"
" xorb %b2,%b3\n"
" shrl $8,%2\n"
" xorl %c6(,%3,4),%2\n"
" movb (%5),%b3\n"
" orb %b3,%b3\n"
" movl %2,8(%7)\n"
" jnz 1b\n"
: "=c" (key0), "=a" (key1), "=b" (key2), "=&d" (dummy), "=D" (sp)
: "S" (p), "i" (crc_32_tab), "D" (sp)
);
# else
key0 = *sp++;
key1 = *sp++;
key2 = *sp++;
do {
*sp++ = key0 = crc32 (key0, *p++);
*sp++ = key1 = (key1 + (u8)key0) * 134775813 + 1;
*sp++ = key2 = crc32 (key2, key1 >> 24);
} while (*p);
sp -= 3;
# endif
do
{
u8 target, pre_target;
# if USE_GCC_X86_ASM && TARGET_CPU
asm(
" movl $-12,%%edi\n"
" pushl %%ebx\n"
" addl $12,%3\n"
" pushl %%ecx\n"
" xorl %%edx,%%edx\n"
" pushl %%ebp\n"
" jmp 2f\n"
"1: shrl $2,%%edx\n"
" movb %c8(%%edx),%%dl\n"
" xorb -1(%3,%%edi),%%dl\n"
#if TARGET_CPU == 6
" movzbl %%dl,%%ebp\n"
#else
" movl %%edx,%%ebp\n"
#endif
" xorb %b4,%%dl\n"
" shrl $8,%4\n"
#if TARGET_CPU == 6
" movzbl %%dl,%%edx\n"
#else
" andl $0xff,%%edx\n"
#endif
" xorl %c7(,%%edx,4),%4\n"
#if TARGET_CPU == 6
" movzbl %b4,%%edx\n"
#else
" movb %b4,%%dl\n"
#endif
" addl %5,%%edx\n"
" imul $134775813,%%edx\n"
" leal 1(%%edx),%5\n"
" shrl $24,%%edx\n"
#if TARGET_CPU == 6
" xorl %6,%%edx\n"
" shrl $8,%6\n"
" movzbl %%dl,%%edx\n"
#else
" xorb %b6,%%dl\n"
" shrl $8,%6\n"
#endif
" xorl %c7(,%%edx,4),%6\n"
"2: \n"
#if TARGET_CPU == 6
" movzwl %w6,%%edx\n"
#else
" movw %w6,%%dx\n"
#endif
" shrl $2,%%edx\n"
" movb %c8(%%edx),%%dl\n"
" xorb (%3,%%edi),%%dl\n"
#if TARGET_CPU == 6
" movzbl %%dl,%%ebp\n"
#else
" movl %%edx,%%ebp\n"
#endif
" xorb %b4,%%dl\n"
" shrl $8,%4\n"
#if TARGET_CPU == 6
" movzbl %%dl,%%edx\n"
#else
" andl $0xff,%%edx\n"
#endif
" xorl %c7(,%%edx,4),%4\n"
#if TARGET_CPU == 6
" movzbl %b4,%%edx\n"
#else
" movb %b4,%%dl\n"
#endif
" addl %5,%%edx\n"
" imul $134775813,%%edx\n"
" leal 1(%%edx),%5\n"
" shrl $24,%%edx\n"
#if TARGET_CPU == 6
" xorl %6,%%edx\n"
" shrl $8,%6\n"
" movzbl %%dl,%%edx\n"
#else
" xorb %b6,%%dl\n"
" shrl $8,%6\n"
#endif
" xorl %c7(,%%edx,4),%6\n"
" addl $2,%%edi\n"
#if TARGET_CPU == 6
" movzwl %w6,%%edx\n"
#else
" movw %w6,%%dx\n"
#endif
" jne 1b\n"
#if TARGET_CPU == 6
" movzwl %w6,%6\n"
#else
" andl $0xffff,%6\n"
#endif
" movb -1(%3),%1\n"
" shrl $2,%6\n"
" movl %%ebp,%k2\n"
" popl %%ebp\n"
" popl %%ecx\n"
" xorb %c8(%6),%1\n"
" popl %%ebx\n"
: "=S" (b), "=a" (target), "=d" (pre_target)
: "S" (b), "c" (key0), "a" (key1), "b" (key2),
"i" (crc_32_tab), "i" (mult_tab)
: "edi"
);
# else
# if !USE_MULT_TAB
u16 t;
# endif
u32 kez0, kez1, kez2;
u8 *e = b + FILE_SIZE - 1;
kez0 = key0, kez1 = key1, kez2 = key2;
do
{
# if USE_MULT_TAB
pre_target = *b++ ^ mult_tab [(u16)(kez2) >> 2];
# else
t = kez2 | 2;
pre_target = *b++ ^ (u8)(((u16) (t * (t^1)) >> 8));
# endif
kez0 = crc32 (kez0, pre_target);
kez1 = (kez1 + (u8)kez0) * 134775813 + 1;
kez2 = crc32 (kez2, kez1 >> 24);
}
while (b < e);
# if USE_MULT_TAB
target = *b++ ^ mult_tab [(u16)(kez2) >> 2];
# else
t = kez2 | 2;
target = *b++ ^ (u8)(((u16) (t * (t^1)) >> 8));
# endif
# endif
/*printf ("pw=%s, t1=%02x, t2=%02x (%02x, %02x)\n", pw, target, pre_target, b[0], b[1]);*/
if (target != *b++)
goto out;
if (pre_target == *b++)
count2++;
}
while(--count);
if ((changed = cbfunc (pw, 0)))
return changed;
out: ;
}
while ((changed = genfunc ()));
return 0;
}
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