ref: 41fb39a4f483037f32a9a8d5abb491fd6a902739
dir: /test/csstest.c/
/* csstest.c - test program for libdvdcss * * Samuel Hocevar <[email protected]> - June 2001 * Updated on Nov 13th 2001 for libdvdcss version 1.0.0 * * This piece of code is public domain */ #include <stdlib.h> #include <dvdcss/dvdcss.h> /* Macro to check if a sector is scrambled */ #define IsSectorScrambled(buf) (((unsigned char*)(buf))[0x14] & 0x30) /* Print parts of a 2048 bytes buffer */ void dumpsector( unsigned char * ); int main( int i_argc, char *ppsz_argv[] ) { dvdcss_handle dvdcss; unsigned char p_buffer[ DVDCSS_BLOCK_SIZE ]; unsigned int i_sector; /* Print version number */ printf( "cool, I found libdvdcss version %s\n", dvdcss_interface_2 ); /* Check for 2 arguments */ if( i_argc != 3 ) { printf( "usage: %s <device> <sector>\n", ppsz_argv[0] ); return -1; } /* Save the requested sector */ i_sector = atoi( ppsz_argv[2] ); /* Initialize libdvdcss */ dvdcss = dvdcss_open( ppsz_argv[1] ); if( dvdcss == NULL ) { printf( "argh ! couldn't open DVD (%s)\n", ppsz_argv[1] ); return -1; } /* Set the file descriptor at sector i_sector */ dvdcss_seek( dvdcss, i_sector, DVDCSS_NOFLAGS ); /* Read one sector */ dvdcss_read( dvdcss, p_buffer, 1, DVDCSS_NOFLAGS ); /* Print the sector */ printf( "requested sector:\n" ); dumpsector( p_buffer ); /* Check if sector was encrypted */ if( IsSectorScrambled( p_buffer ) ) { /* Set the file descriptor position to the previous location */ /* ... and get the appropriate key for this sector */ dvdcss_seek( dvdcss, i_sector, DVDCSS_SEEK_KEY ); /* Read sector again, and decrypt it on the fly */ dvdcss_read( dvdcss, p_buffer, 1, DVDCSS_READ_DECRYPT ); /* Print the decrypted sector */ printf( "unscrambled sector:\n" ); dumpsector( p_buffer ); } else { printf( "sector is not scrambled\n" ); } /* Close the device */ dvdcss_close( dvdcss ); return 0; } /* Print parts of a 2048 bytes buffer */ void dumpsector( unsigned char *p_buffer ) { int i_amount = 10; for( ; i_amount ; i_amount--, p_buffer++ ) printf( "%.2x", *p_buffer ); printf( " ... " ); i_amount = 25; p_buffer += 200; for( ; i_amount ; i_amount--, p_buffer++ ) printf( "%.2x", *p_buffer ); printf( " ...\n" ); }