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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 <string.h> // FIXME: conflicts with fs.h
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <css.h>
#if CSS_MAJOR_VERSION > 0 || (CSS_MAJOR_VERSION == 0 && CSS_MINOR_VERSION > 1)
# include <dvd.h>
# undef OLD_CSS_API
#else
# if defined(__NetBSD__) || defined(__OpenBSD__)
# include <sys/dvdio.h>
# elif defined(__linux__)
# include <linux/cdrom.h>
# elif defined(__sun)
# include <sun/dvdio.h>
# else
# error "Need the DVD ioctls"
# endif
# define OLD_CSS_API 1
#endif
#include "dvdauth.h"
#if OLD_CSS_API
/*
* provide some backward compatibiliy macros to compile this
* code using the old libcss-0.1
*/
#define DVDHandle int
#define DVDOpenFailed (-1)
#define DVDAuth(hdl, s) ioctl(hdl, DVD_AUTH, s)
#define DVDOpenDevice(path) open(path, O_RDONLY)
#define DVDCloseDevice(hdl) close(hdl)
#define CSSDVDisEncrypted(hdl) CSSisEncrypted(hdl)
#define CSSDVDAuthDisc CSSAuthDisc
#define CSSDVDAuthTitlePath(hdl,key_title,path) \
CSSAuthTitle(hdl,key_title,path_to_lba(path))
#else /*OLD_CSS_API*/
#define DVDHandle struct dvd_device *
#define DVDOpenFailed NULL
#endif /*OLD_CSS_API*/
char *dvd_auth_device=NULL;
unsigned char key_disc[2048];
unsigned char key_title[5];
unsigned char *dvdimportkey=NULL;
int descrambling=0;
#if OLD_CSS_API
/*
* With the old libcss-0.1 api, we have to find out the LBA for
* a title for title authentication.
*/
#ifdef __linux__
#include <linux/fs.h>
#include <errno.h>
#ifndef FIBMAP
#define FIBMAP 1
#endif
static int path_to_lba (char *path)
{
int fd, lba = 0;
if ((fd = open(path, O_RDONLY)) == -1) {
fprintf(stderr, "Cannot open file %s: %s",
path ? path : "(NULL)", strerror(errno));
return -1;
}
if (ioctl(fd, FIBMAP, &lba) != 0) {
perror ("ioctl FIBMAP");
fprintf(stderr,"Hint: run mplayer as root!\n");
close(fd);
return -1;
}
close(fd);
return lba;
}
#else /*linux*/
static int path_to_lba (char *path)
{
#warning translating pathname to iso9660 LBA is not supported on this platform
fprintf(stderr, "Translating pathname to iso9660 LBA is not supported on this platform\n");
return -1;
}
#endif /*linux*/
#endif /*OLD_CSS_API*/
static void reset_agids ( DVDHandle dvd )
{
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;
DVDAuth(dvd, &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 , char *filename )
{
DVDHandle dvd; /* DVD device handle */
if ((dvd=DVDOpenDevice(dev)) == DVDOpenFailed) {
fprintf(stderr,"DVD: cannot open DVD device \"%s\".\n",dev);
return 1;
}
if (!CSSDVDisEncrypted(dvd)) {
printf("DVD is unencrypted! Skipping authentication!\n(note: you should not use -dvd switch for unencrypted discs!)\n");
DVDCloseDevice(dvd);
return 0;
} else printf("DVD is encrypted, issuing authentication ...\n");
/* reset AGIDs */
reset_agids(dvd);
/* authenticate disc */
if (CSSDVDAuthDisc(dvd,key_disc)) {
fprintf(stderr,"DVD: CSSDVDAuthDisc() failed.\n");
DVDCloseDevice(dvd);
return 1;
}
if (CSSDVDAuthTitlePath(dvd,key_title,filename)) {
fprintf(stderr,"DVD: CSSDVDAuthTitle() failed.\n");
DVDCloseDevice(dvd);
return 1;
}
/* decrypting title */
if (CSSDecryptTitleKey (key_title, key_disc) < 0) {
fprintf(stderr,"DVD: CSSDecryptTitleKey() failed.\n");
DVDCloseDevice(dvd);
return 1;
}
DVDCloseDevice(dvd);
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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