1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* (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_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
|
