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/* (C)2001 by LGB (Gabor Lenart), based on example programs in libcss
lgb@lgb.hu */
/* don't do anything with this source if css support was not requested */
#include "config.h"
#ifdef HAVE_LIBCSS
#include <stdio.h>
#include <stdlib.h>
#include <linux/cdrom.h>
// FIXME #include <string.h> conflicts with #include <linux/fs.h> (below)
//#include <string.h> // FIXME this conflicts with #include <linux/fs.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <css.h>
#include "dvdauth.h"
char *dvd_auth_device=NULL;
unsigned char key_disc[2048];
unsigned char key_title[5];
unsigned char *dvdimportkey=NULL;
int descrambling=0;
#include <linux/fs.h>
#ifndef FIBMAP
#define FIBMAP 1
#endif
static int path_to_lba ( int fd )
{
int lba = 0;
if (ioctl(fd, FIBMAP, &lba) < 0) {
perror ("ioctl FIBMAP");
fprintf(stderr,"Hint: run mplayer as root!\n");
// close(fd);
return -1;
}
return lba;
}
static void reset_agids ( int fd )
{
dvd_authinfo ai;
int i;
for (i = 0; i < 4; i++) {
memset(&ai, 0, sizeof(ai));
ai.type = DVD_INVALIDATE_AGID;
ai.lsa.agid = i;
ioctl(fd, DVD_AUTH, &ai);
}
}
int dvd_import_key ( unsigned char *hexkey )
{
unsigned char *t=key_title;
int digit=4,len;
bzero(key_title,sizeof(key_title));
// printf("DVD key: %s\n",hexkey);
for (len=0;len<10;len++) {
// printf("-> %c\n",*hexkey);
if (!*hexkey) return 1;
if (*hexkey>='A'&&*hexkey<='F') *t|=(*hexkey-'A'+10)<<digit;
else if (*hexkey>='0'&&*hexkey<='9') *t|=(*hexkey-'0')<<digit;
else return 1;
if (digit) digit=0; else {
digit=4;
t++;
}
hexkey++;
}
if (*hexkey) return 1;
printf("DVD key (requested): %02X%02X%02X%02X%02X\n",key_title[0],key_title[1],key_title[2],key_title[3],key_title[4]);
descrambling=1;
return 0;
}
int dvd_auth ( char *dev , int fd )
{
int devfd; /* FD of DVD device */
int lba;
if ((devfd=open(dev,O_RDONLY))<0) {
fprintf(stderr,"DVD: cannot open DVD device \"%s\".\n",dev);
return 1;
}
if (!CSSisEncrypted(devfd)) {
printf("DVD is unencrypted! Skipping authentication!\n(note: you should not use -dvd switch for unencrypted discs!)\n");
return 0;
} else printf("DVD is encrypted, issuing authentication ...\n");
/* reset AGIDs */
reset_agids(devfd);
/* authenticate disc */
if (CSSAuthDisc(devfd,key_disc)) {
fprintf(stderr,"DVD: CSSAuthDisc() failed.\n");
return 1;
}
/* authenticate title */
lba=path_to_lba(fd);
if (lba==-1) {
fprintf(stderr,"DVD: path_to_lba() failed.\n");
return 1;
}
if (CSSAuthTitle(devfd,key_title,lba)) {
fprintf(stderr,"DVD: CSSAuthTitle() failed.\n");
return 1;
}
/* decrypting title */
if (CSSDecryptTitleKey (key_title, key_disc) < 0) {
fprintf(stderr,"DVD: CSSDecryptTitleKey() failed.\n");
return 1;
}
close(devfd);
printf("DVD title key is: %02X%02X%02X%02X%02X\n",key_title[0],key_title[1],key_title[2],key_title[3],key_title[4]);
descrambling=1;
return 0;
}
#endif
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