| 1 |
/* |
| 2 |
* zipcrack.c - where the 'crack' routine is located |
| 3 |
*/ |
| 4 |
|
| 5 |
/* |
| 6 |
* guiding comments for gencrack.pl |
| 7 |
* |
| 8 |
* MTH cpmask init_cpmask crack_cpmask load_img |
| 9 |
* |
| 10 |
* LCL init_crack_pw crack_pw |
| 11 |
* LOD load_zip |
| 12 |
* |
| 13 |
* ARC ARCH_i386 |
| 14 |
* DEF USE_MULT_TAB |
| 15 |
* DEF TARGET_CPU 0 $ 5 $ 6 |
| 16 |
* DFT TARGET_CPU==COMPILE_CPU && USE_MULT_TAB |
| 17 |
* DEP defined(__i386__) || defined(__i386) || defined(i386) |
| 18 |
* |
| 19 |
* DEF USE_MULT_TAB |
| 20 |
* DFT USE_MULT_TAB |
| 21 |
* DEP 1 |
| 22 |
* |
| 23 |
* END |
| 24 |
*/ |
| 25 |
|
| 26 |
#include "crc32.h" |
| 27 |
|
| 28 |
#undef USE_GCC_X86_ASM |
| 29 |
#define USE_GCC_X86_ASM (ARCH_i386 && USE_GCC_ASM && USE_MULT_TAB) |
| 30 |
|
| 31 |
static void init_crack_pw (void) |
| 32 |
{ |
| 33 |
#if USE_MULT_TAB |
| 34 |
u16 t; |
| 35 |
for (t = 0; t < 16384; t++) |
| 36 |
mult_tab[t] = ((t*4+3) * (t*4+2) >> 8) & 0xff; |
| 37 |
#endif |
| 38 |
} |
| 39 |
|
| 40 |
static int crack_pw (gen_func genfunc, callback_func cbfunc) |
| 41 |
{ |
| 42 |
int changed = -1; |
| 43 |
int crack_count = 0; |
| 44 |
u32 key_stack[(MAX_PW+1) * 3] = { 0x12345678UL, 0x23456789UL, 0x34567890UL }; |
| 45 |
u32 *sp; |
| 46 |
#if USE_GCC_X86_ASM |
| 47 |
int dummy; /* dummy output. */ |
| 48 |
#endif |
| 49 |
|
| 50 |
sp = 0; /* to calm down dumb compilers */ |
| 51 |
|
| 52 |
do |
| 53 |
{ |
| 54 |
int count = file_count; |
| 55 |
int count2 = 0; |
| 56 |
u32 key0, key1, key2; |
| 57 |
u8 *p; |
| 58 |
u8 *b = files; |
| 59 |
|
| 60 |
if (changed < 0) |
| 61 |
{ |
| 62 |
changed = strlen (pw); |
| 63 |
pw_end = pw + changed; |
| 64 |
sp = key_stack + changed * 3; |
| 65 |
} |
| 66 |
|
| 67 |
sp -= changed * 3; |
| 68 |
p = (u8 *)pw_end - changed; |
| 69 |
|
| 70 |
if (++crack_count >= 1000000 && verbosity) |
| 71 |
{ |
| 72 |
printf ("checking pw %-40.40s\r", pw), fflush (stdout); |
| 73 |
crack_count = 0; |
| 74 |
} |
| 75 |
|
| 76 |
# if USE_GCC_X86_ASM && TARGET_CPU |
| 77 |
asm( |
| 78 |
" movl (%7),%0\n" |
| 79 |
" movl 4(%7),%1\n" |
| 80 |
" movl 8(%7),%2\n" |
| 81 |
" xorl %3,%3\n" |
| 82 |
" movb (%5),%b3\n" |
| 83 |
"1: xorb %b0,%b3\n" |
| 84 |
" shrl $8,%0\n" |
| 85 |
" incl %5\n" |
| 86 |
" xorl %c6(,%3,4),%0\n" |
| 87 |
" movb %b0,%b3\n" |
| 88 |
" addl $12,%7\n" |
| 89 |
" movl %0,(%7)\n" |
| 90 |
" addl %1,%3\n" |
| 91 |
" imul $134775813,%3\n" |
| 92 |
" leal 1(%3),%1\n" |
| 93 |
" shrl $24,%3\n" |
| 94 |
" movl %1,4(%7)\n" |
| 95 |
" xorb %b2,%b3\n" |
| 96 |
" shrl $8,%2\n" |
| 97 |
" xorl %c6(,%3,4),%2\n" |
| 98 |
" movb (%5),%b3\n" |
| 99 |
" orb %b3,%b3\n" |
| 100 |
" movl %2,8(%7)\n" |
| 101 |
" jnz 1b\n" |
| 102 |
: "=c" (key0), "=a" (key1), "=b" (key2), "=&d" (dummy), "=D" (sp) |
| 103 |
: "S" (p), "i" (crc_32_tab), "D" (sp) |
| 104 |
); |
| 105 |
# else |
| 106 |
key0 = *sp++; |
| 107 |
key1 = *sp++; |
| 108 |
key2 = *sp++; |
| 109 |
do { |
| 110 |
*sp++ = key0 = crc32 (key0, *p++); |
| 111 |
*sp++ = key1 = (key1 + (u8)key0) * 134775813 + 1; |
| 112 |
*sp++ = key2 = crc32 (key2, key1 >> 24); |
| 113 |
} while (*p); |
| 114 |
|
| 115 |
sp -= 3; |
| 116 |
# endif |
| 117 |
|
| 118 |
do |
| 119 |
{ |
| 120 |
u8 target, pre_target; |
| 121 |
|
| 122 |
# if USE_GCC_X86_ASM && TARGET_CPU |
| 123 |
asm( |
| 124 |
" movl $-12,%%edi\n" |
| 125 |
" pushl %%ebx\n" |
| 126 |
" addl $12,%3\n" |
| 127 |
" pushl %%ecx\n" |
| 128 |
" xorl %%edx,%%edx\n" |
| 129 |
" pushl %%ebp\n" |
| 130 |
" jmp 2f\n" |
| 131 |
"1: shrl $2,%%edx\n" |
| 132 |
" movb %c8(%%edx),%%dl\n" |
| 133 |
" xorb -1(%3,%%edi),%%dl\n" |
| 134 |
#if TARGET_CPU == 6 |
| 135 |
" movzbl %%dl,%%ebp\n" |
| 136 |
#else |
| 137 |
" movl %%edx,%%ebp\n" |
| 138 |
#endif |
| 139 |
" xorb %b4,%%dl\n" |
| 140 |
" shrl $8,%4\n" |
| 141 |
#if TARGET_CPU == 6 |
| 142 |
" movzbl %%dl,%%edx\n" |
| 143 |
#else |
| 144 |
" andl $0xff,%%edx\n" |
| 145 |
#endif |
| 146 |
" xorl %c7(,%%edx,4),%4\n" |
| 147 |
#if TARGET_CPU == 6 |
| 148 |
" movzbl %b4,%%edx\n" |
| 149 |
#else |
| 150 |
" movb %b4,%%dl\n" |
| 151 |
#endif |
| 152 |
" addl %5,%%edx\n" |
| 153 |
" imul $134775813,%%edx\n" |
| 154 |
" leal 1(%%edx),%5\n" |
| 155 |
" shrl $24,%%edx\n" |
| 156 |
#if TARGET_CPU == 6 |
| 157 |
" xorl %6,%%edx\n" |
| 158 |
" shrl $8,%6\n" |
| 159 |
" movzbl %%dl,%%edx\n" |
| 160 |
#else |
| 161 |
" xorb %b6,%%dl\n" |
| 162 |
" shrl $8,%6\n" |
| 163 |
#endif |
| 164 |
" xorl %c7(,%%edx,4),%6\n" |
| 165 |
"2: \n" |
| 166 |
#if TARGET_CPU == 6 |
| 167 |
" movzwl %w6,%%edx\n" |
| 168 |
#else |
| 169 |
" movw %w6,%%dx\n" |
| 170 |
#endif |
| 171 |
" shrl $2,%%edx\n" |
| 172 |
" movb %c8(%%edx),%%dl\n" |
| 173 |
" xorb (%3,%%edi),%%dl\n" |
| 174 |
#if TARGET_CPU == 6 |
| 175 |
" movzbl %%dl,%%ebp\n" |
| 176 |
#else |
| 177 |
" movl %%edx,%%ebp\n" |
| 178 |
#endif |
| 179 |
" xorb %b4,%%dl\n" |
| 180 |
" shrl $8,%4\n" |
| 181 |
#if TARGET_CPU == 6 |
| 182 |
" movzbl %%dl,%%edx\n" |
| 183 |
#else |
| 184 |
" andl $0xff,%%edx\n" |
| 185 |
#endif |
| 186 |
" xorl %c7(,%%edx,4),%4\n" |
| 187 |
#if TARGET_CPU == 6 |
| 188 |
" movzbl %b4,%%edx\n" |
| 189 |
#else |
| 190 |
" movb %b4,%%dl\n" |
| 191 |
#endif |
| 192 |
" addl %5,%%edx\n" |
| 193 |
" imul $134775813,%%edx\n" |
| 194 |
" leal 1(%%edx),%5\n" |
| 195 |
" shrl $24,%%edx\n" |
| 196 |
#if TARGET_CPU == 6 |
| 197 |
" xorl %6,%%edx\n" |
| 198 |
" shrl $8,%6\n" |
| 199 |
" movzbl %%dl,%%edx\n" |
| 200 |
#else |
| 201 |
" xorb %b6,%%dl\n" |
| 202 |
" shrl $8,%6\n" |
| 203 |
#endif |
| 204 |
" xorl %c7(,%%edx,4),%6\n" |
| 205 |
" addl $2,%%edi\n" |
| 206 |
#if TARGET_CPU == 6 |
| 207 |
" movzwl %w6,%%edx\n" |
| 208 |
#else |
| 209 |
" movw %w6,%%dx\n" |
| 210 |
#endif |
| 211 |
" jne 1b\n" |
| 212 |
#if TARGET_CPU == 6 |
| 213 |
" movzwl %w6,%6\n" |
| 214 |
#else |
| 215 |
" andl $0xffff,%6\n" |
| 216 |
#endif |
| 217 |
" movb -1(%3),%1\n" |
| 218 |
" shrl $2,%6\n" |
| 219 |
" movl %%ebp,%k2\n" |
| 220 |
" popl %%ebp\n" |
| 221 |
" popl %%ecx\n" |
| 222 |
" xorb %c8(%6),%1\n" |
| 223 |
" popl %%ebx\n" |
| 224 |
: "=S" (b), "=a" (target), "=d" (pre_target) |
| 225 |
: "S" (b), "c" (key0), "a" (key1), "b" (key2), |
| 226 |
"i" (crc_32_tab), "i" (mult_tab) |
| 227 |
: "edi" |
| 228 |
); |
| 229 |
# else |
| 230 |
# if !USE_MULT_TAB |
| 231 |
u16 t; |
| 232 |
# endif |
| 233 |
u32 kez0, kez1, kez2; |
| 234 |
u8 *e = b + FILE_SIZE - 1; |
| 235 |
|
| 236 |
kez0 = key0, kez1 = key1, kez2 = key2; |
| 237 |
do |
| 238 |
{ |
| 239 |
# if USE_MULT_TAB |
| 240 |
pre_target = *b++ ^ mult_tab [(u16)(kez2) >> 2]; |
| 241 |
# else |
| 242 |
t = kez2 | 2; |
| 243 |
pre_target = *b++ ^ (u8)(((u16) (t * (t^1)) >> 8)); |
| 244 |
# endif |
| 245 |
kez0 = crc32 (kez0, pre_target); |
| 246 |
kez1 = (kez1 + (u8)kez0) * 134775813 + 1; |
| 247 |
kez2 = crc32 (kez2, kez1 >> 24); |
| 248 |
} |
| 249 |
while (b < e); |
| 250 |
|
| 251 |
# if USE_MULT_TAB |
| 252 |
target = *b++ ^ mult_tab [(u16)(kez2) >> 2]; |
| 253 |
# else |
| 254 |
t = kez2 | 2; |
| 255 |
target = *b++ ^ (u8)(((u16) (t * (t^1)) >> 8)); |
| 256 |
# endif |
| 257 |
# endif |
| 258 |
|
| 259 |
/*printf ("pw=%s, t1=%02x, t2=%02x (%02x, %02x)\n", pw, target, pre_target, b[0], b[1]);*/ |
| 260 |
|
| 261 |
if (target != *b++) |
| 262 |
goto out; |
| 263 |
|
| 264 |
if (pre_target == *b++) |
| 265 |
count2++; |
| 266 |
} |
| 267 |
while(--count); |
| 268 |
|
| 269 |
if ((changed = cbfunc (pw, 0))) |
| 270 |
return changed; |
| 271 |
|
| 272 |
out: ; |
| 273 |
} |
| 274 |
while ((changed = genfunc ())); |
| 275 |
|
| 276 |
return 0; |
| 277 |
} |
| 278 |
|
