preliminary DVD support using libcss

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@493 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 106 insertions, 0 deletions

diff --git a/dvdauth.c b/dvdauth.c
new file mode 100644
index 0000000000..da6832c58a
--- /dev/null
+++ b/dvdauth.c
@@ -0,0 +1,106 @@
+/* (C)2001 by LGB (Gabor Lenart), based on example programs in libcss
+   Some TODO: root privilegies really needed??  */
+
+/* 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_device=NULL;
+unsigned char key_disc[2048];
+unsigned char key_title[5];
+
+
+#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_auth ( char *dev , int fd )
+{
+        int devfd;  /* FD of DVD device */
+        int lba;
+
+//	printf("DVD: auth fd=%d on %s.\n",fd,dev);
+
+	if ((devfd=open(dev,O_RDONLY))<0) {
+		fprintf(stderr,"DVD: cannot open DVD device \"%s\".\n",dev);
+		return 1;
+	}
+
+	/* 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);
+	return 0;
+}
+
+
+#endif