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-rw-r--r--test/csstest.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/test/csstest.c b/test/csstest.c
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+/* csstest.c - test program for libdvdcss
+ *
+ * Sam Hocevar <sam@zoy.org> - June 2001
+ * Updated on Nov 13th 2001 for libdvdcss version 1.0.0
+ * Additional error checks on Aug 9th 2002
+ * Aligned data reads on Jan 28th 2003
+ *
+ * This piece of code is public domain */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <dvdcss/dvdcss.h>
+
+static int isscrambled( unsigned char * );
+static void dumpsector ( unsigned char * );
+
+int main( int i_argc, char *ppsz_argv[] )
+{
+ dvdcss_t dvdcss;
+ unsigned char p_data[ DVDCSS_BLOCK_SIZE * 2 ];
+ unsigned char *p_buffer;
+ unsigned int i_sector;
+ int i_ret;
+
+ /* Check for 2 arguments */
+ if( i_argc != 3 )
+ {
+ printf( "usage: %s <target> <sector>\n", ppsz_argv[0] );
+ printf( "examples:\n" );
+ printf( " %s /dev/hdc 1024\n", ppsz_argv[0] );
+ printf( " %s D: 1024\n", ppsz_argv[0] );
+ printf( " %s scrambledfile.vob 1024\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;
+ }
+
+ /* Align our read buffer */
+ p_buffer = p_data + DVDCSS_BLOCK_SIZE
+ - ((long int)p_data & (DVDCSS_BLOCK_SIZE-1));
+
+ /* Set the file descriptor at sector i_sector and read one sector */
+ i_ret = dvdcss_seek( dvdcss, i_sector, DVDCSS_NOFLAGS );
+ if( i_ret != (int)i_sector )
+ {
+ printf( "seek failed (%s)\n", dvdcss_error( dvdcss ) );
+ dvdcss_close( dvdcss );
+ return i_ret;
+ }
+
+ i_ret = dvdcss_read( dvdcss, p_buffer, 1, DVDCSS_NOFLAGS );
+ if( i_ret != 1 )
+ {
+ printf( "read failed (%s)\n", dvdcss_error( dvdcss ) );
+ dvdcss_close( dvdcss );
+ return i_ret;
+ }
+
+ /* Print the sector */
+ printf( "requested sector: " );
+ dumpsector( p_buffer );
+
+ /* Check if sector was encrypted */
+ if( isscrambled( p_buffer ) )
+ {
+ /* Set the file descriptor position to the previous location */
+ /* ... and get the appropriate key for this sector */
+ i_ret = dvdcss_seek( dvdcss, i_sector, DVDCSS_SEEK_KEY );
+ if( i_ret != (int)i_sector )
+ {
+ printf( "seek failed (%s)\n", dvdcss_error( dvdcss ) );
+ dvdcss_close( dvdcss );
+ return i_ret;
+ }
+
+ /* Read sector again, and decrypt it on the fly */
+ i_ret = dvdcss_read( dvdcss, p_buffer, 1, DVDCSS_READ_DECRYPT );
+ if( i_ret != 1 )
+ {
+ printf( "read failed (%s)\n", dvdcss_error( dvdcss ) );
+ dvdcss_close( dvdcss );
+ return i_ret;
+ }
+
+ /* Print the decrypted sector */
+ printf( "unscrambled sector: " );
+ dumpsector( p_buffer );
+ }
+ else
+ {
+ printf( "sector is not scrambled\n" );
+ }
+
+ /* Close the device */
+ i_ret = dvdcss_close( dvdcss );
+
+ return i_ret;
+}
+
+/* Check if a sector is scrambled */
+static int isscrambled( unsigned char *p_buffer )
+{
+ return p_buffer[ 0x14 ] & 0x30;
+}
+
+/* Print parts of a 2048 bytes buffer */
+static void dumpsector( unsigned char *p_buffer )
+{
+ int i_amount = 4;
+ for( ; i_amount ; i_amount--, p_buffer++ ) printf( "%.2x", *p_buffer );
+ printf( "..." );
+ i_amount = 22;
+ p_buffer += 200;
+ for( ; i_amount ; i_amount--, p_buffer++ ) printf( "%.2x", *p_buffer );
+ printf( "...\n" );
+}