makeivs.c
上传用户:fubang
上传日期:2009-06-18
资源大小:2071k
文件大小:2k
- #include <stdio.h>
- #define SWAP(x,y) { unsigned char tmp = x; x = y; y = tmp; }
- int main( int argc, char *argv[] )
- {
- int i, j, n;
- FILE *f_ivs_out;
- unsigned char K[16];
- unsigned char S[256];
- unsigned char buffer[64], *s;
- if( argc != 3 )
- {
- printf( "usage: makeivs <ivs file> <104-bit key>n" );
- return( 1 );
- }
- i = 0;
- s = argv[2];
- buffer[0] = s[0];
- buffer[1] = s[1];
- buffer[2] = ' ';
- while( sscanf( buffer, "%x", &n ) == 1 )
- {
- if( n < 0 || n > 255 )
- {
- fprintf( stderr, "Invalid wep key.n" );
- return( 1 );
- }
- K[3 + i++] = n;
- if( i >= 16 ) break;
- s += 2;
- if( s[0] == ':' || s[0] == '-' )
- s++;
- if( s[0] == ' ' || s[1] == ' ' )
- break;
-
- buffer[0] = s[0];
- buffer[1] = s[1];
- }
- if( i != 13 )
- {
- fprintf( stderr, "Invalid wep key.n" );
- return( 1 );
- }
- if( ( f_ivs_out = fopen( argv[1], "wb+" ) ) == NULL )
- {
- perror( "fopen" );
- return( 1 );
- }
- fprintf( f_ivs_out, "xBFxCAx84xD4x01x01x01x01x01x01" );
- for( n = 0x000000; n <= 0x0FFFFF; n++ )
- {
- K[2] = ( n >> 16 ) & 0xFF;
- K[1] = ( n >> 8 ) & 0xFF;
- K[0] = ( n ) & 0xFF;
- fprintf( f_ivs_out, "%c%c%c", K[0], K[1], K[2] );
- for( i = 0; i < 256; i++ )
- S[i] = i;
- for( i = j = 0; i < 256; i++ )
- {
- j = ( j + S[i] + K[i & 15] ) & 0xFF;
- SWAP( S[i], S[j] );
- }
- i = 1; j = ( 0 + S[i] ) & 0xFF; SWAP(S[i], S[j]);
- fprintf( f_ivs_out, "%c", 0xAA ^ S[(S[i] + S[j]) & 0xFF] );
- i = 2; j = ( j + S[i] ) & 0xFF; SWAP(S[i], S[j]);
- fprintf( f_ivs_out, "%cxFF", 0xAA ^ S[(S[i] + S[j]) & 0xFF] );
- }
- fclose( f_ivs_out );
- printf( "Done.n" );
- return( 0 );
- }