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Commit 5a796310 authored by Stéphane Borel's avatar Stéphane Borel
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-Much cleaning in css code. It should work fine now. 

Most of DVD with movie in title 1 should work.

To come : support for movie in other titles.
parent 3b3156e1
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Showing with 491 additions and 407 deletions
plugins/dvd/dvd_css.c
View file @ 5a796310
......@@ -2,7 +2,7 @@
* dvd_css.c: Functions for DVD authentification and unscrambling
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
* $Id: dvd_css.c,v 1.5 2001/02/09 18:34:01 stef Exp $
* $Id: dvd_css.c,v 1.6 2001/02/12 09:58:06 stef Exp $
*
* Author: Stphane Borel <stef@via.ecp.fr>
*
......@@ -43,22 +43,16 @@
# include <linux/cdrom.h>
#endif
#include "common.h"
#include "intf_msg.h"
#include "dvd_css.h"
#include "dvd_ifo.h"
#include "input_dvd.h"
#include "css_table.h"
/*****************************************************************************
* CSS tables
*****************************************************************************/
unsigned int pi_css_tab0[11]={ 5, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4 };
unsigned char pi_css_tab1[256]=
static u8 pi_css_tab1[256]=
{ 0x33, 0x73, 0x3b, 0x26, 0x63, 0x23, 0x6b, 0x76,
0x3e, 0x7e, 0x36, 0x2b, 0x6e, 0x2e, 0x66, 0x7b,
0xd3, 0x93, 0xdb, 0x06, 0x43, 0x03, 0x4b, 0x96,
......@@ -90,9 +84,10 @@ unsigned char pi_css_tab1[256]=
0x39, 0x79, 0x31, 0x20, 0x69, 0x29, 0x61, 0x70,
0x38, 0x78, 0x30, 0x21, 0x68, 0x28, 0x60, 0x71,
0xb7, 0xf7, 0xbf, 0xa2, 0xe7, 0xa7, 0xef, 0xf2,
0xba, 0xfa, 0xb2, 0xaf, 0xea, 0xaa, 0xe2, 0xff };
0xba, 0xfa, 0xb2, 0xaf, 0xea, 0xaa, 0xe2, 0xff
};
unsigned char pi_css_tab2[256]=
static u8 pi_css_tab2[256]=
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x09, 0x08, 0x0b, 0x0a, 0x0d, 0x0c, 0x0f, 0x0e,
0x12, 0x13, 0x10, 0x11, 0x16, 0x17, 0x14, 0x15,
......@@ -127,7 +122,7 @@ unsigned char pi_css_tab2[256]=
0xe4, 0xe5, 0xe6, 0xe7, 0xe0, 0xe1, 0xe2, 0xe3
};
unsigned char pi_css_tab3[512]=
static u8 pi_css_tab3[512]=
{ 0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff,
0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff,
0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff,
......@@ -191,9 +186,10 @@ unsigned char pi_css_tab3[512]=
0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff,
0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff,
0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff,
0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff };
0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff
};
unsigned char pi_css_tab4[256]=
static u8 pi_css_tab4[256]=
{ 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
......@@ -225,9 +221,10 @@ unsigned char pi_css_tab4[256]=
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff };
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};
unsigned char pi_css_tab5[256]=
static u8 pi_css_tab5[256]=
{ 0xff, 0x7f, 0xbf, 0x3f, 0xdf, 0x5f, 0x9f, 0x1f,
0xef, 0x6f, 0xaf, 0x2f, 0xcf, 0x4f, 0x8f, 0x0f,
0xf7, 0x77, 0xb7, 0x37, 0xd7, 0x57, 0x97, 0x17,
......@@ -259,7 +256,153 @@ unsigned char pi_css_tab5[256]=
0xf8, 0x78, 0xb8, 0x38, 0xd8, 0x58, 0x98, 0x18,
0xe8, 0x68, 0xa8, 0x28, 0xc8, 0x48, 0x88, 0x08,
0xf0, 0x70, 0xb0, 0x30, 0xd0, 0x50, 0x90, 0x10,
0xe0, 0x60, 0xa0, 0x20, 0xc0, 0x40, 0x80, 0x00 };
0xe0, 0x60, 0xa0, 0x20, 0xc0, 0x40, 0x80, 0x00
};
/* Mangle tables usesd for key decryption */
static u8 pi_css_mangle0[256] =
{
0x00, 0x81, 0x03, 0x82, 0x06, 0x87, 0x05, 0x84,
0x0C, 0x8D, 0x0F, 0x8E, 0x0A, 0x8B, 0x09, 0x88,
0x18, 0x99, 0x1B, 0x9A, 0x1E, 0x9F, 0x1D, 0x9C,
0x14, 0x95, 0x17, 0x96, 0x12, 0x93, 0x11, 0x90,
0x30, 0xB1, 0x33, 0xB2, 0x36, 0xB7, 0x35, 0xB4,
0x3C, 0xBD, 0x3F, 0xBE, 0x3A, 0xBB, 0x39, 0xB8,
0x28, 0xA9, 0x2B, 0xAA, 0x2E, 0xAF, 0x2D, 0xAC,
0x24, 0xA5, 0x27, 0xA6, 0x22, 0xA3, 0x21, 0xA0,
0x60, 0xE1, 0x63, 0xE2, 0x66, 0xE7, 0x65, 0xE4,
0x6C, 0xED, 0x6F, 0xEE, 0x6A, 0xEB, 0x69, 0xE8,
0x78, 0xF9, 0x7B, 0xFA, 0x7E, 0xFF, 0x7D, 0xFC,
0x74, 0xF5, 0x77, 0xF6, 0x72, 0xF3, 0x71, 0xF0,
0x50, 0xD1, 0x53, 0xD2, 0x56, 0xD7, 0x55, 0xD4,
0x5C, 0xDD, 0x5F, 0xDE, 0x5A, 0xDB, 0x59, 0xD8,
0x48, 0xC9, 0x4B, 0xCA, 0x4E, 0xCF, 0x4D, 0xCC,
0x44, 0xC5, 0x47, 0xC6, 0x42, 0xC3, 0x41, 0xC0,
0xC0, 0x41, 0xC3, 0x42, 0xC6, 0x47, 0xC5, 0x44,
0xCC, 0x4D, 0xCF, 0x4E, 0xCA, 0x4B, 0xC9, 0x48,
0xD8, 0x59, 0xDB, 0x5A, 0xDE, 0x5F, 0xDD, 0x5C,
0xD4, 0x55, 0xD7, 0x56, 0xD2, 0x53, 0xD1, 0x50,
0xF0, 0x71, 0xF3, 0x72, 0xF6, 0x77, 0xF5, 0x74,
0xFC, 0x7D, 0xFF, 0x7E, 0xFA, 0x7B, 0xF9, 0x78,
0xE8, 0x69, 0xEB, 0x6A, 0xEE, 0x6F, 0xED, 0x6C,
0xE4, 0x65, 0xE7, 0x66, 0xE2, 0x63, 0xE1, 0x60,
0xA0, 0x21, 0xA3, 0x22, 0xA6, 0x27, 0xA5, 0x24,
0xAC, 0x2D, 0xAF, 0x2E, 0xAA, 0x2B, 0xA9, 0x28,
0xB8, 0x39, 0xBB, 0x3A, 0xBE, 0x3F, 0xBD, 0x3C,
0xB4, 0x35, 0xB7, 0x36, 0xB2, 0x33, 0xB1, 0x30,
0x90, 0x11, 0x93, 0x12, 0x96, 0x17, 0x95, 0x14,
0x9C, 0x1D, 0x9F, 0x1E, 0x9A, 0x1B, 0x99, 0x18,
0x88, 0x09, 0x8B, 0x0A, 0x8E, 0x0F, 0x8D, 0x0C,
0x84, 0x05, 0x87, 0x06, 0x82, 0x03, 0x81, 0x00
};
static u8 pi_css_mangle1[256] =
{
0xC4, 0xCD, 0xCE, 0xCB, 0xC8, 0xC9, 0xCA, 0xCF,
0xCC, 0xC5, 0xC6, 0xC3, 0xC0, 0xC1, 0xC2, 0xC7,
0x14, 0x1D, 0x1E, 0x1B, 0x18, 0x19, 0x1A, 0x1F,
0x1C, 0x15, 0x16, 0x13, 0x10, 0x11, 0x12, 0x17,
0x24, 0x2D, 0x2E, 0x2B, 0x28, 0x29, 0x2A, 0x2F,
0x2C, 0x25, 0x26, 0x23, 0x20, 0x21, 0x22, 0x27,
0x34, 0x3D, 0x3E, 0x3B, 0x38, 0x39, 0x3A, 0x3F,
0x3C, 0x35, 0x36, 0x33, 0x30, 0x31, 0x32, 0x37,
0x04, 0x0D, 0x0E, 0x0B, 0x08, 0x09, 0x0A, 0x0F,
0x0C, 0x05, 0x06, 0x03, 0x00, 0x01, 0x02, 0x07,
0xD4, 0xDD, 0xDE, 0xDB, 0xD8, 0xD9, 0xDA, 0xDF,
0xDC, 0xD5, 0xD6, 0xD3, 0xD0, 0xD1, 0xD2, 0xD7,
0xE4, 0xED, 0xEE, 0xEB, 0xE8, 0xE9, 0xEA, 0xEF,
0xEC, 0xE5, 0xE6, 0xE3, 0xE0, 0xE1, 0xE2, 0xE7,
0xF4, 0xFD, 0xFE, 0xFB, 0xF8, 0xF9, 0xFA, 0xFF,
0xFC, 0xF5, 0xF6, 0xF3, 0xF0, 0xF1, 0xF2, 0xF7,
0x44, 0x4D, 0x4E, 0x4B, 0x48, 0x49, 0x4A, 0x4F,
0x4C, 0x45, 0x46, 0x43, 0x40, 0x41, 0x42, 0x47,
0x94, 0x9D, 0x9E, 0x9B, 0x98, 0x99, 0x9A, 0x9F,
0x9C, 0x95, 0x96, 0x93, 0x90, 0x91, 0x92, 0x97,
0xA4, 0xAD, 0xAE, 0xAB, 0xA8, 0xA9, 0xAA, 0xAF,
0xAC, 0xA5, 0xA6, 0xA3, 0xA0, 0xA1, 0xA2, 0xA7,
0xB4, 0xBD, 0xBE, 0xBB, 0xB8, 0xB9, 0xBA, 0xBF,
0xBC, 0xB5, 0xB6, 0xB3, 0xB0, 0xB1, 0xB2, 0xB7,
0x84, 0x8D, 0x8E, 0x8B, 0x88, 0x89, 0x8A, 0x8F,
0x8C, 0x85, 0x86, 0x83, 0x80, 0x81, 0x82, 0x87,
0x54, 0x5D, 0x5E, 0x5B, 0x58, 0x59, 0x5A, 0x5F,
0x5C, 0x55, 0x56, 0x53, 0x50, 0x51, 0x52, 0x57,
0x64, 0x6D, 0x6E, 0x6B, 0x68, 0x69, 0x6A, 0x6F,
0x6C, 0x65, 0x66, 0x63, 0x60, 0x61, 0x62, 0x67,
0x74, 0x7D, 0x7E, 0x7B, 0x78, 0x79, 0x7A, 0x7F,
0x7C, 0x75, 0x76, 0x73, 0x70, 0x71, 0x72, 0x77
};
static u8 pi_css_mangle2[256] =
{
0xC4, 0x24, 0x14, 0x34, 0xCE, 0x2E, 0x1E, 0x3E,
0xCD, 0x2D, 0x1D, 0x3D, 0xCB, 0x2B, 0x1B, 0x3B,
0x44, 0xA4, 0x94, 0xB4, 0x4E, 0xAE, 0x9E, 0xBE,
0x4D, 0xAD, 0x9D, 0xBD, 0x4B, 0xAB, 0x9B, 0xBB,
0x04, 0xE4, 0xD4, 0xF4, 0x0E, 0xEE, 0xDE, 0xFE,
0x0D, 0xED, 0xDD, 0xFD, 0x0B, 0xEB, 0xDB, 0xFB,
0x84, 0x64, 0x54, 0x74, 0x8E, 0x6E, 0x5E, 0x7E,
0x8D, 0x6D, 0x5D, 0x7D, 0x8B, 0x6B, 0x5B, 0x7B,
0xCC, 0x2C, 0x1C, 0x3C, 0xC6, 0x26, 0x16, 0x36,
0xC5, 0x25, 0x15, 0x35, 0xC3, 0x23, 0x13, 0x33,
0x4C, 0xAC, 0x9C, 0xBC, 0x46, 0xA6, 0x96, 0xB6,
0x45, 0xA5, 0x95, 0xB5, 0x43, 0xA3, 0x93, 0xB3,
0x0C, 0xEC, 0xDC, 0xFC, 0x06, 0xE6, 0xD6, 0xF6,
0x05, 0xE5, 0xD5, 0xF5, 0x03, 0xE3, 0xD3, 0xF3,
0x8C, 0x6C, 0x5C, 0x7C, 0x86, 0x66, 0x56, 0x76,
0x85, 0x65, 0x55, 0x75, 0x83, 0x63, 0x53, 0x73,
0xC8, 0x28, 0x18, 0x38, 0xCA, 0x2A, 0x1A, 0x3A,
0xC9, 0x29, 0x19, 0x39, 0xCF, 0x2F, 0x1F, 0x3F,
0x48, 0xA8, 0x98, 0xB8, 0x4A, 0xAA, 0x9A, 0xBA,
0x49, 0xA9, 0x99, 0xB9, 0x4F, 0xAF, 0x9F, 0xBF,
0x08, 0xE8, 0xD8, 0xF8, 0x0A, 0xEA, 0xDA, 0xFA,
0x09, 0xE9, 0xD9, 0xF9, 0x0F, 0xEF, 0xDF, 0xFF,
0x88, 0x68, 0x58, 0x78, 0x8A, 0x6A, 0x5A, 0x7A,
0x89, 0x69, 0x59, 0x79, 0x8F, 0x6F, 0x5F, 0x7F,
0xC0, 0x20, 0x10, 0x30, 0xC2, 0x22, 0x12, 0x32,
0xC1, 0x21, 0x11, 0x31, 0xC7, 0x27, 0x17, 0x37,
0x40, 0xA0, 0x90, 0xB0, 0x42, 0xA2, 0x92, 0xB2,
0x41, 0xA1, 0x91, 0xB1, 0x47, 0xA7, 0x97, 0xB7,
0x00, 0xE0, 0xD0, 0xF0, 0x02, 0xE2, 0xD2, 0xF2,
0x01, 0xE1, 0xD1, 0xF1, 0x07, 0xE7, 0xD7, 0xF7,
0x80, 0x60, 0x50, 0x70, 0x82, 0x62, 0x52, 0x72,
0x81, 0x61, 0x51, 0x71, 0x87, 0x67, 0x57, 0x77
};
static u8 pi_reverse[256] =
{
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
};
/*
* Local functions
......@@ -267,28 +410,38 @@ unsigned char pi_css_tab5[256]=
/*****************************************************************************
* CSSGetASF : Get Authentification success flag
* ---
* Returns :
* -1 on ioctl error,
* 0 if the device needs to be authenticated,
* 1 either.
*****************************************************************************/
static int CSSGetASF( int i_fd )
{
dvd_authinfo ai;
dvd_authinfo auth_info;
ai.type = DVD_LU_SEND_ASF;
ai.lsasf.asf = 0;
auth_info.type = DVD_LU_SEND_ASF;
auth_info.lsasf.asf = 0;
for( ai.lsasf.agid = 0 ; ai.lsasf.agid < 4 ; ai.lsasf.agid++ )
for( auth_info.lsasf.agid = 0 ; auth_info.lsasf.agid < 4 ;
auth_info.lsasf.agid++ )
{
if( !( ioctl( i_fd, DVD_AUTH, &ai ) ) )
if( !( ioctl( i_fd, DVD_AUTH, &auth_info ) ) )
{
intf_Msg("CSS: %sAuthenticated\n", (ai.lsasf.asf) ? "" : "not");
return 0;
intf_WarnMsg( 3, "CSS: %sAuthenticated",
( auth_info.lsasf.asf ) ? "" : "not " );
return auth_info.lsasf.asf;
}
}
intf_ErrMsg( "CSS Error: GetASF" );
/* The ioctl process has failed */
intf_ErrMsg( "CSS: GetASF Fatal Error" );
return -1;
}
/*****************************************************************************
* CSSCryptKey : shuffles bits and unencrypt keys.
* Used during authentication and disc key negociation in CSSInit.
* ---
* i_key_type : 0->key1, 1->key2, 2->buskey.
* i_varient : between 0 and 31.
......@@ -296,12 +449,16 @@ static int CSSGetASF( int i_fd )
static void CSSCryptKey( int i_key_type, int i_varient,
u8 const * pi_challenge, u8* pi_key )
{
/* "Secret" key */
u8 pi_css_secret[5] = { 0xE2, 0xA3, 0x45, 0x10, 0xF4 };
/* Permutation table for challenge */
u8 ppi_perm_challenge[3][10] =
{ { 1, 3, 0, 7, 5, 2, 9, 6, 4, 8 },
{ 6, 1, 9, 3, 8, 5, 7, 4, 0, 2 },
{ 4, 0, 3, 5, 7, 2, 8, 6, 1, 9 } };
/* Permutation table for varient table */
/* Permutation table for varient table for key2 and buskey */
u8 ppi_perm_varient[2][32] =
{ { 0x0a, 0x08, 0x0e, 0x0c, 0x0b, 0x09, 0x0f, 0x0d,
0x1a, 0x18, 0x1e, 0x1c, 0x1b, 0x19, 0x1f, 0x1d,
......@@ -311,7 +468,8 @@ static void CSSCryptKey( int i_key_type, int i_varient,
0x10, 0x18, 0x14, 0x1c, 0x00, 0x08, 0x04, 0x0c,
0x13, 0x1b, 0x17, 0x1f, 0x03, 0x0b, 0x07, 0x0f,
0x11, 0x19, 0x15, 0x1d, 0x01, 0x09, 0x05, 0x0d } };
u8 pi_css_secret[5] = { 0xE2, 0xA3, 0x45, 0x10, 0xF4 };
/* CSS varient for mangling */
u8 pi_css_varients[32] =
{ 0x00, 0x01, 0x04, 0x05, 0x10, 0x11, 0x14, 0x15,
0x20, 0x21, 0x24, 0x25, 0x30, 0x31, 0x34, 0x35,
......@@ -349,6 +507,7 @@ static void CSSCryptKey( int i_key_type, int i_varient,
i_lfsr0 = ( pi_tmp1[0] << 17 ) | ( pi_tmp1[1] << 9 ) |
( ( pi_tmp1[2] & ~7 ) << 1 ) | 8 | (pi_tmp1[2] & 7);
/*
* reverse lfsr0/1 to simplify calculation in loop
*/
......@@ -361,6 +520,7 @@ static void CSSCryptKey( int i_key_type, int i_varient,
( pi_reverse[pi_tmp1[3]] );
i_index = sizeof( pi_bits );
do
{
i_lfsr0_o = ( i_lfsr0 >> 12) ^ ( i_lfsr0 >> 4) ^
......@@ -384,8 +544,6 @@ static void CSSCryptKey( int i_key_type, int i_varient,
i_css_varient = pi_css_varients[i_css_varient];
intf_WarnMsg( 3, "CSS varient: %d\n", i_css_varient );
/*
* Mangling
*/
......@@ -396,6 +554,7 @@ static void CSSCryptKey( int i_key_type, int i_varient,
pi_tmp1[i] = pi_css_mangle2[i_index] ^ i_term;
}
pi_tmp1[4] ^= pi_tmp1[0];
for( i = 5, i_term = 0 ; --i >= 0 ; i_term = pi_tmp1[i] )
{
i_index = pi_bits[20+i] ^ pi_tmp1[i];
......@@ -403,6 +562,7 @@ static void CSSCryptKey( int i_key_type, int i_varient,
pi_tmp2[i] = pi_css_mangle2[i_index] ^ i_term;
}
pi_tmp2[4] ^= pi_tmp2[0];
for( i = 5, i_term = 0 ; --i >= 0 ; i_term = pi_tmp2[i] )
{
i_index = pi_bits[15+i] ^ pi_tmp2[i];
......@@ -411,6 +571,7 @@ static void CSSCryptKey( int i_key_type, int i_varient,
pi_tmp1[i] = pi_css_mangle0[i_index];
}
pi_tmp1[4] ^= pi_tmp1[0];
for( i = 5, i_term = 0 ; --i >= 0 ; i_term = pi_tmp1[i] )
{
i_index = pi_bits[10+i] ^ pi_tmp1[i];
......@@ -419,6 +580,7 @@ static void CSSCryptKey( int i_key_type, int i_varient,
pi_tmp2[i] = pi_css_mangle0[i_index];
}
pi_tmp2[4] ^= pi_tmp2[0];
for( i = 5, i_term = 0 ; --i >= 0 ; i_term = pi_tmp2[i] )
{
i_index = pi_bits[5+i] ^ pi_tmp2[i];
......@@ -437,222 +599,131 @@ static void CSSCryptKey( int i_key_type, int i_varient,
return;
}
static int CSSAuthHost( dvd_authinfo *ai, disc_t *disc )
{
int i;
switch( ai->type )
{
/* Host data receive (host changes state) */
case DVD_LU_SEND_AGID:
ai->type = DVD_HOST_SEND_CHALLENGE;
break;
case DVD_LU_SEND_KEY1:
for( i=0; i<KEY_SIZE; i++ )
{
disc->pi_key1[i] = ai->lsk.key[4-i];
}
for( i=0; i<32; ++i )
{
CSSCryptKey( 0, i, disc->pi_challenge,
disc->pi_key_check );
if( memcmp( disc->pi_key_check,
disc->pi_key1, KEY_SIZE ) == 0 )
{
intf_WarnMsg( 3, "CSS: Drive Authentic - using varient %d\n", i);
disc->i_varient = i;
ai->type = DVD_LU_SEND_CHALLENGE;
break;
}
}
// intf_ErrMsg( "Drive would not Authenticate" );
// ai->type = DVD_AUTH_FAILURE;
// return -22;
break;
case DVD_LU_SEND_CHALLENGE:
for( i=0; i<10; ++i )
{
disc->pi_challenge[i] = ai->hsc.chal[9-i];
}
CSSCryptKey( 1, disc->i_varient, disc->pi_challenge,
disc->pi_key2 );
ai->type = DVD_HOST_SEND_KEY2;
break;
/* Host data send */
case DVD_HOST_SEND_CHALLENGE:
for( i=0; i<10; ++i )
{
ai->hsc.chal[9-i] = disc->pi_challenge[i];
}
/* Returning data, let LU change state */
break;
case DVD_HOST_SEND_KEY2:
for( i=0; i<KEY_SIZE; ++i )
{
ai->hsk.key[4-i] = disc->pi_key2[i];
}
/* Returning data, let LU change state */
break;
default:
intf_ErrMsg( "CSS: Got invalid state %d", ai->type );
return -22;
}
return 0;
}
/*****************************************************************************
* CSSCracker : title key decryption by cracking
* ---
* This function is called by CSSGetKeys to find a key
*****************************************************************************/
// FIXME : adapt to vlc
#define KEYSTREAMBYTES 10
static unsigned char invtab4[256];
static int CSScracker( int StartVal,
unsigned char* pCrypted,
unsigned char* pDecrypted,
DVD_key_t *StreamKey,
DVD_key_t *pkey )
static int CSSCracker( int i_start,
unsigned char * p_crypted,
unsigned char * p_decrypted,
DVD_key_t * p_sector_key,
DVD_key_t * p_key )
{
unsigned char MyBuf[10];
unsigned int t1,t2,t3,t4,t5,t6;
unsigned int nTry;
unsigned int vCandidate;
int i;
unsigned int j;
unsigned char pi_buffer[10];
unsigned int i_t1, i_t2, i_t3, i_t4, i_t5, i_t6;
unsigned int i_try;
unsigned int i_candidate;
unsigned int i, j;
int i_exit = -1;
for (i=0;i<10;i++)
{
MyBuf[i] = pi_css_tab1[pCrypted[i]] ^ pDecrypted[i];
}
/* Test that CSStab4 is a permutation */
memset( invtab4, 0, 256 );
for( i = 0 ; i < 256 ; i++ )
{
invtab4[ pi_css_tab4[i] ] = 1;
}
for (i = 0 ; i < 256 ; i++)
{
if (invtab4[ i ] != 1)
{
intf_ErrMsg( "CSS: Permutation error" );
exit( -1 );
}
}
/* initialize the inverse of table4 */
for( i = 0 ; i < 256 ; i++ )
for( i = 0 ; i < 10 ; i++ )
{
invtab4[ pi_css_tab4[i] ] = i;
pi_buffer[i] = pi_css_tab1[p_crypted[i]] ^ p_decrypted[i];
}
for( nTry = StartVal ; nTry < 65536 ; nTry++ )
for( i_try = i_start ; i_try < 0x10000 ; i_try++ )
{
t1 = nTry >> 8 | 0x100;
t2 = nTry & 0xff;
t3 = 0; /* not needed */
t5 = 0;
i_t1 = i_try >> 8 | 0x100;
i_t2 = i_try & 0xff;
i_t3 = 0; /* not needed */
i_t5 = 0;
/* iterate cipher 4 times to reconstruct LFSR2 */
for( i = 0 ; i < 4 ; i++ )
{
/* advance LFSR1 normaly */
t4=pi_css_tab2[t2]^pi_css_tab3[t1];
t2=t1>>1;
t1=((t1&1)<<8)^t4;
t4=pi_css_tab5[t4];
/* deduce t6 & t5 */
t6 = MyBuf[ i ];
if( t5 )
i_t4 = pi_css_tab2[i_t2] ^ pi_css_tab3[i_t1];
i_t2 = i_t1 >> 1;
i_t1 = ( ( i_t1 & 1 ) << 8 ) ^ i_t4;
i_t4 = pi_css_tab5[i_t4];
/* deduce i_t6 & i_t5 */
i_t6 = pi_buffer[i];
if( i_t5 )
{
t6 = ( t6 + 0xff )&0x0ff;
i_t6 = ( i_t6 + 0xff ) & 0x0ff;
}
if( t6 < t4 )
if( i_t6 < i_t4 )
{
t6 += 0x100;
i_t6 += 0x100;
}
t6 -= t4;
t5 += t6 + t4;
t6 = invtab4[ t6 ];
/* feed / advance t3 / t5 */
t3 = (t3 << 8) | t6;
t5 >>= 8;
i_t6 -= i_t4;
i_t5 += i_t6 + i_t4;
i_t6 = pi_css_tab4[ i_t6 ];
/* feed / advance i_t3 / i_t5 */
i_t3 = ( i_t3 << 8 ) | i_t6;
i_t5 >>= 8;
}
vCandidate = t3;
i_candidate = i_t3;
/* iterate 6 more times to validate candidate key */
for( ; i < KEYSTREAMBYTES ; i++ )
for( ; i < 10 ; i++ )
{
i_t4 = pi_css_tab2[i_t2] ^ pi_css_tab3[i_t1];
i_t2 = i_t1 >> 1;
i_t1 = ( ( i_t1 & 1 ) << 8 ) ^ i_t4;
i_t4 = pi_css_tab5[i_t4];
i_t6 = ((((((( i_t3 >> 3 ) ^ i_t3 ) >> 1 ) ^
i_t3 ) >> 8 ) ^ i_t3 ) >> 5 ) & 0xff;
i_t3 = ( i_t3 << 8 ) | i_t6;
i_t6 = pi_css_tab4[i_t6];
i_t5 += i_t6 + i_t4;
if( ( i_t5 & 0xff ) != pi_buffer[i] )
{
t4=pi_css_tab2[t2]^pi_css_tab3[t1];
t2=t1>>1;
t1=((t1&1)<<8)^t4;
t4=pi_css_tab5[t4];
t6=(((((((t3>>3)^t3)>>1)^t3)>>8)^t3)>>5)&0xff;
t3=(t3<<8)|t6;
t6=pi_css_tab4[t6];
t5+=t6+t4;
if( (t5 & 0xff) != MyBuf[i] ) break;
t5>>=8;
break;
}
i_t5 >>= 8;
}
if( i == KEYSTREAMBYTES )
if( i == 10 )
{
/* Do 4 backwards steps of iterating t3 to deduce initial state */
t3 = vCandidate;
i_t3 = i_candidate;
for( i = 0 ; i < 4 ; i++ )
{
t1 = t3 & 0xff;
t3 = ( t3 >> 8 );
i_t1 = i_t3 & 0xff;
i_t3 = ( i_t3 >> 8 );
/* easy to code, and fast enough bruteforce
* search for byte shifted in */
for( j=0 ; j < 256 ; j++ )
for( j = 0 ; j < 256 ; j++ )
{
t3 = (t3 & 0x1ffff) | ( j << 17 );
t6=(((((((t3>>3)^t3)>>1)^t3)>>8)^t3)>>5)&0xff;
if( t6 == t1 ) break;
i_t3 = ( i_t3 & 0x1ffff) | ( j << 17 );
i_t6 = ((((((( i_t3 >> 3 ) ^ i_t3 ) >> 1 ) ^
i_t3 ) >> 8 ) ^ i_t3 ) >> 5 ) & 0xff;
if( i_t6 == i_t1 )
{
break;
}
}
}
// printf( "Candidate: t1=%03x t2=%02x t3=%08x\n", 0x100|(nTry>>8),nTry&0x0ff, t3 );
t4 = (t3>>1) - 4;
for(t5=0;t5<8;t5++)
i_t4 = ( i_t3 >> 1 ) - 4;
for( i_t5 = 0 ; i_t5 < 8; i_t5++ )
{
if ( ((t4+t5)*2 + 8 - ((t4+t5)&7))==t3 )
if( ( ( i_t4 + i_t5 ) * 2 + 8 - ( (i_t4 + i_t5 ) & 7 ) )
== i_t3 )
{
(*pkey)[0] = nTry>>8;
(*pkey)[1] = nTry & 0xFF;
(*pkey)[2] = ((t4+t5) >> 0) & 0xFF;
(*pkey)[3] = ((t4+t5) >> 8) & 0xFF;
(*pkey)[4] = ((t4+t5) >> 16) & 0xFF;
i_exit = nTry+1;
(*p_key)[0] = i_try>>8;
(*p_key)[1] = i_try & 0xFF;
(*p_key)[2] = ( ( i_t4 + i_t5 ) >> 0) & 0xFF;
(*p_key)[3] = ( ( i_t4 + i_t5 ) >> 8) & 0xFF;
(*p_key)[4] = ( ( i_t4 + i_t5 ) >> 16) & 0xFF;
i_exit = i_try + 1;
}
}
}
}
if (i_exit>=0)
if( i_exit >= 0 )
{
(*pkey)[0] ^= (*StreamKey)[0];
(*pkey)[1] ^= (*StreamKey)[1];
(*pkey)[2] ^= (*StreamKey)[2];
(*pkey)[3] ^= (*StreamKey)[3];
(*pkey)[4] ^= (*StreamKey)[4];
(*p_key)[0] ^= (*p_sector_key)[0];
(*p_key)[1] ^= (*p_sector_key)[1];
(*p_key)[2] ^= (*p_sector_key)[2];
(*p_key)[3] ^= (*p_sector_key)[3];
(*p_key)[4] ^= (*p_sector_key)[4];
}
return i_exit;
......@@ -683,121 +754,167 @@ int CSSTest( int i_fd )
/*****************************************************************************
* CSSInit : CSS Structure initialisation and DVD authentication.
* It simulates the mutual authentication between logical unit and host.
* ---
* Since we don't need the disc key to find the title key, we just run the
* basic unavoidable commands to authenticate device and disc.
*****************************************************************************/
css_t CSSInit( int i_fd )
{
dvd_authinfo ai;
/* structures defined in cdrom.h or dvdio.h */
dvd_authinfo auth_info;
dvd_struct dvd;
css_t css;
int rv = -1;
int i_error = -1;
int i;
css.i_fd = i_fd;
css.b_error = 0;
memset( &ai, 0, sizeof(ai) );
// if (CSSGetASF (i_fd))
// return css;
memset( &auth_info, 0, sizeof(auth_info) );
/* Test authentication success */
switch( CSSGetASF( i_fd ) )
{
case -1:
css.b_error = 1;
case 1:
return css;
case 0:
intf_WarnMsg( 3, "CSS: Authenticating" );
}
/* Init sequence, request AGID */
for( i=1; (i<4)&&(rv== -1) ; ++i )
for( i = 1; i < 4 ; ++i )
{
intf_WarnMsg( 3, "CSS: Request AGID [%d]...", i );
ai.type = DVD_LU_SEND_AGID;
ai.lsa.agid = 0;
rv = ioctl (i_fd, DVD_AUTH, &ai);
if (rv == -1)
intf_WarnMsg( 3, "CSS: Request AGID %d", i );
auth_info.type = DVD_LU_SEND_AGID;
auth_info.lsa.agid = 0;
i_error = ioctl( i_fd, DVD_AUTH, &auth_info );
if( i_error != -1 )
{
intf_ErrMsg( "CSS: N/A, invalidating" );
ai.type = DVD_INVALIDATE_AGID;
ai.lsa.agid = 0;
ioctl( i_fd, DVD_AUTH, &ai );
/* No error during ioctl: we know if device
* is authenticated */
break;
}
intf_ErrMsg( "CSS: AGID N/A, invalidating" );
auth_info.type = DVD_INVALIDATE_AGID;
auth_info.lsa.agid = 0;
ioctl( i_fd, DVD_AUTH, &auth_info );
}
if( rv==-1 )
/* Unable to authenticate without AGID */
if( i_error == -1 )
{
intf_ErrMsg( "CSS: Cannot get AGID\n" );
css.b_error = 1;
intf_ErrMsg( "CSS: Cannot get AGID" );
return css;
}
for( i=0 ; i<10; ++i )
for( i = 0 ; i < 10; ++i )
{
css.disc.pi_challenge[i] = i;
}
/* Send AGID to host */
if( CSSAuthHost(&ai, &(css.disc) )<0 )
{
intf_ErrMsg( "CSS Error: Send AGID to host failed" );
return css;
}
auth_info.type = DVD_HOST_SEND_CHALLENGE;
/* Get challenge from host */
if( CSSAuthHost( &ai, &(css.disc) )<0)
for( i = 0 ; i < 10 ; ++i )
{
intf_ErrMsg( "CSS Error: Get challenge from host failed" );
return css;
auth_info.hsc.chal[9-i] = css.disc.pi_challenge[i];
}
css.i_agid = ai.lsa.agid;
/* Returning data, let LU change state */
css.i_agid = auth_info.lsa.agid;
/* Send challenge to LU */
if( ioctl( i_fd, DVD_AUTH, &ai )<0 )
if( ioctl( i_fd, DVD_AUTH, &auth_info )<0 )
{
intf_ErrMsg( "CSS Error: Send challenge to LU failed ");
intf_ErrMsg( "CSS: Send challenge to LU failed ");
css.b_error = 1;
return css;
}
/* Get key1 from LU */
if( ioctl( i_fd, DVD_AUTH, &ai )<0)
if( ioctl( i_fd, DVD_AUTH, &auth_info ) < 0)
{
intf_ErrMsg( "CSS Error: Get key1 from LU failed ");
intf_ErrMsg( "CSS: Get key1 from LU failed ");
css.b_error = 1;
return css;
}
/* Send key1 to host */
// if (_CSSAuthHost(&ai, disc) < 0) {
if( CSSAuthHost( &ai, &(css.disc) )<0)
for( i = 0 ; i < KEY_SIZE ; i++ )
{
css.disc.pi_key1[i] = auth_info.lsk.key[4-i];
}
for( i = 0 ; i < 32 ; ++i )
{
CSSCryptKey( 0, i, css.disc.pi_challenge,
css.disc.pi_key_check );
if( memcmp( css.disc.pi_key_check,
css.disc.pi_key1, KEY_SIZE ) == 0 )
{
intf_ErrMsg( "CSS Error: Send key1 to host failed" );
intf_WarnMsg( 3, "CSS: Drive Authentic - using varient %d", i);
css.disc.i_varient = i;
auth_info.type = DVD_LU_SEND_CHALLENGE;
break;
}
}
if( i == 32 )
{
intf_ErrMsg( "Drive would not Authenticate" );
auth_info.type = DVD_AUTH_FAILURE;
css.b_error = 1;
return css;
}
/* Get challenge from LU */
if( ioctl( i_fd, DVD_AUTH, &ai)<0 )
if( ioctl( i_fd, DVD_AUTH, &auth_info ) < 0 )
{
intf_ErrMsg( "CSS Error: Get challenge from LU failed ");
intf_ErrMsg( "CSS: Get challenge from LU failed ");
css.b_error = 1;
return css;
}
/* Send challenge to host */
if( CSSAuthHost( &ai, &(css.disc) )<0 )
for( i = 0 ; i < 10 ; ++i )
{
intf_ErrMsg( "CSS Error: Send challenge to host failed");
return css;
css.disc.pi_challenge[i] = auth_info.hsc.chal[9-i];
}
CSSCryptKey( 1, css.disc.i_varient, css.disc.pi_challenge,
css.disc.pi_key2 );
auth_info.type = DVD_HOST_SEND_KEY2;
/* Get key2 from host */
if( CSSAuthHost( &ai, &(css.disc) )<0 )
for( i = 0 ; i < KEY_SIZE ; ++i )
{
intf_ErrMsg( "CSS Error: Get key2 from host failed" );
return css;
auth_info.hsk.key[4-i] = css.disc.pi_key2[i];
}
/* Returning data, let LU change state */
/* Send key2 to LU */
if( ioctl( i_fd, DVD_AUTH, &ai )<0 )
if( ioctl( i_fd, DVD_AUTH, &auth_info ) < 0 )
{
intf_ErrMsg( "CSS Error: Send key2 to LU failed (expected)" );
intf_ErrMsg( "CSS: Send key2 to LU failed (expected)" );
return css;
}
if( ai.type == DVD_AUTH_ESTABLISHED )
if( auth_info.type == DVD_AUTH_ESTABLISHED )
{
intf_WarnMsg( 3, "DVD is authenticated");
intf_WarnMsg( 3, "CSS: Authentication established");
}
else if( ai.type == DVD_AUTH_FAILURE )
else if( auth_info.type == DVD_AUTH_FAILURE )
{
intf_ErrMsg("CSS Error: DVD authentication failed");
css.b_error = 1;
intf_ErrMsg("CSS: DVD authentication failed");
}
memcpy( css.disc.pi_challenge, css.disc.pi_key1, KEY_SIZE );
......@@ -806,169 +923,116 @@ css_t CSSInit( int i_fd )
css.disc.pi_challenge,
css.disc.pi_key_check );
intf_WarnMsg( 3, "CSS: Received Session Key\n" );
intf_WarnMsg( 1, "CSS: Received Session Key" );
if( css.i_agid < 0 )
{
css.b_error = 1;
return css;
}
// if (CSSGetASF (i_fd) < 0)
// return css;
/* Test authentication success */
switch( CSSGetASF( i_fd ) )
{
case -1:
css.b_error = 1;
case 1:
return css;
case 0:
intf_WarnMsg( 3, "CSS: Getting disc key" );
}
/* Get encrypted disc key */
dvd.type = DVD_STRUCT_DISCKEY;
dvd.disckey.agid = css.i_agid;
memset( dvd.disckey.value, 0, 2048 );
if( ioctl( i_fd, DVD_READ_STRUCT, &dvd )<0 )
if( ioctl( i_fd, DVD_READ_STRUCT, &dvd ) < 0 )
{
intf_ErrMsg( "CSS Error: Could not read Disc Key" );
intf_ErrMsg( "CSS: Could not read Disc Key" );
css.b_error = 1;
return css;
}
for (i=0; i<sizeof dvd.disckey.value; i++)
#if 0
/* Unencrypt disc key using bus key */
for( i = 0 ; i < sizeof(dvd.disckey.value) ; i++ )
{
dvd.disckey.value[i] ^= css.disc.pi_key_check[4 - (i % KEY_SIZE)];
}
memcpy( css.disc.pi_key_check, dvd.disckey.value, 2048 );
//
// if (CSSGetASF (i_fd) < 0)
// {
// css.b_error = 1;
// return css;
// }
#endif
/* Test authentication success */
switch( CSSGetASF( i_fd ) )
{
case -1:
case 0:
css.b_error = 1;
case 1:
return css;
}
return css;
}
/*****************************************************************************
* CSSGetKeys : get the disc key of the media en the dvd device, and then
* the title keys.
* The DVD should have been opened before.
* CSSGetKeys : get the title keys.
* The DVD should have been opened and authenticated before.
*****************************************************************************/
#define MaxKeys 1000
#define REPEAT 2
int CSSGetKeys( css_t * p_css )
{
#if 0
/*
* css_auth/libcss method from Derek Fawcus.
* Get encrypted keys with ioctls and decrypt them
* with cracked player keys
*/
dvd_struct dvd;
dvd_authinfo auth;
int i, j;
if( CSSGetASF( p_css->i_fd ) < 0 )
{
return 1;
}
/* Disk key */
dvd.type = DVD_STRUCT_DISCKEY;
dvd.disckey.agid = p_css->i_agid;
memset( dvd.disckey.value, 0, 2048 );
if( ioctl( p_css->i_fd, DVD_READ_STRUCT, &dvd )<0 )
{
intf_ErrMsg( "DVD ioctl error in CSSGetKeys" );
p_css->b_error = 1;
return 1;
}
for( i=0 ; i<sizeof(dvd.disckey.value) ; i++ )
{
dvd.disckey.value[i] ^=
p_css->keys.pi_key_check[4 - (i % KEY_SIZE )];
}
memcpy( p_css->pi_disc_key, dvd.disckey.value, 2048 );
if( CSSGetASF( p_css->i_fd ) < 0 )
{
return 1;
}
/* Title keys */
auth.type = DVD_LU_SEND_TITLE_KEY;
auth.lstk.agid = p_css->i_agid;
for( j=0 ; j<p_css->i_title_nb ; j++ )
{
auth.lstk.lba = p_css->p_title_key[j].i_lba;
if( ioctl( p_css->i_fd, DVD_AUTH, &auth )<0 )
{
intf_ErrMsg( "DVD ioctl error in CSSGetKeys" );
p_css->b_error = 1;
return 1;
}
for( i=0 ; i<KEY_SIZE ; ++i )
{
auth.lstk.title_key[i] ^=
p_css->keys.pi_key_check[4 - (i % KEY_SIZE)];
memcpy( p_css->p_title_key[j].key, auth.lstk.title_key, KEY_SIZE );
}
}
if( CSSGetASF( p_css->i_fd ) < 0 )
{
return 1;
}
#endif
#if 1
/*
* Cracking method from Ethan Hawke.
* Does not use key tables and ioctls.
* Title key cracking method from Ethan Hawke,
* with Frank A. Stevenson algorithm.
* Does not use any player key table and ioctls.
*/
u8 pi_buf[0x800] ;
DVD_key_t my_key;
title_key_t title_key[MaxKeys] ;
int i_title;
title_key_t title_key[10] ;
off_t i_pos = 0;
boolean_t b_encrypted = 0;
boolean_t b_stop_scanning = 0 ;
int i_title;
int i_bytes_read;
int i_best_plen;
int i_best_p;
int i,j,k;
int i_registered_keys = 0 ;
int i_total_keys_found = 0 ;
int i_highest=0 ;
boolean_t b_encrypted = 0;
boolean_t b_stop_scanning = 0 ;
int i_highest= 0;
int i,j,k;
int i_fd = p_css->i_fd;
for( i_title=0 ; i_title<1/*p_css->i_title_nb*/ ; i_title++ )
{
i_pos = p_css->p_title_key[i_title].i;
do
{
do {
i_pos = lseek( i_fd, i_pos, SEEK_SET );
i_bytes_read = read( i_fd, pi_buf, 0x800 );
if( pi_buf[0x14] & 0x30 ) // PES_scrambling_control
/* PES_scrambling_control */
if( pi_buf[0x14] & 0x30 )
{
b_encrypted = 1;
i_best_plen = 0;
i_best_p = 0;
for( i=2 ; i<0x30 ; i++ )
for( i = 2 ; i < 0x30 ; i++ )
{
for( j = i ; ( j < 0x80 ) &&
( pi_buf[0x7F - (j%i)] == pi_buf[0x7F-j] ) ; j++ );
{
for( j=i ; (j<0x80) &&
(pi_buf[0x7F - (j%i)] == pi_buf[0x7F-j]) ; j++ );
if( (j>i_best_plen) && (j>i) )
if( ( j > i_best_plen ) && ( j > i ) )
{
i_best_plen = j;
i_best_p = i;
}
}
if( (i_best_plen>20) && (i_best_plen / i_best_p >= 2) )
}
if( ( i_best_plen > 20 ) && ( i_best_plen / i_best_p >= 2) )
{
i = CSScracker( 0, &pi_buf[0x80],
i = CSSCracker( 0, &pi_buf[0x80],
&pi_buf[0x80 - ( i_best_plen / i_best_p) *i_best_p],
(DVD_key_t*)&pi_buf[0x54],
&my_key );
......@@ -985,24 +1049,28 @@ int CSSGetKeys( css_t * p_css )
k = 1;
}
}
if( k == 0 )
{
memcpy( &( title_key[i_registered_keys].key),
memcpy( &(title_key[i_registered_keys].key),
&my_key,
sizeof(DVD_key_t) );
title_key[i_registered_keys++].i = 1;
i_total_keys_found++;
}
i = CSScracker( i, &pi_buf[0x80],
i = CSSCracker( i, &pi_buf[0x80],
&pi_buf[0x80 -( i_best_plen / i_best_p) *i_best_p],
(DVD_key_t*)&pi_buf[0x54], &my_key);
}
if( i_registered_keys == 1 && title_key[0].i >= REPEAT )
/* Stop search if we find two occurances of the key */
if( i_registered_keys == 1 && title_key[0].i >= 2 )
{
b_stop_scanning = 1;
}
}
}
i_pos += i_bytes_read;
} while( i_bytes_read == 0x800 && !b_stop_scanning);
......@@ -1011,11 +1079,13 @@ int CSSGetKeys( css_t * p_css )
intf_WarnMsg( 3,
"CSS: Found enough occurancies of the same key." );
}
if( !b_encrypted )
{
intf_WarnMsg( 3, "CSS: This file was _NOT_ encrypted!");
return(0);
}
if( b_encrypted && i_registered_keys == 0 )
{
intf_WarnMsg( 3 , "CSS: Unable to determine keys from file.");
......@@ -1038,29 +1108,31 @@ int CSSGetKeys( css_t * p_css )
}
}
i_highest = 0;
#if 0
fprintf(stderr, " Key(s) & key probability\n---------------------\n");
#ifdef STATS
intf_WarnMsg( 1, " Key(s) & key probability\n---------------------");
#endif
for( i=0 ; i<i_registered_keys ; i++ )
{
fprintf(stderr, "%d) %02X %02X %02X %02X %02X - %3.2f%%\n", i,
#ifdef STATS
intf_WarnMsg( 1, "%d) %02X %02X %02X %02X %02X - %3.2f%%", i,
title_key[i].key[0], title_key[i].key[1],
title_key[i].key[2], title_key[i].key[3],
title_key[i].key[4],
title_key[i].i * 100.0 / i_total_keys_found );
#endif
if( title_key[i_highest].i * 100.0 / i_total_keys_found
<= title_key[i].i*100.0 / i_total_keys_found )
{
i_highest = i;
}
}
fprintf(stderr, "\n");
#endif
/* The "find the key with the highest probability" code
* is untested, as I haven't been able to find a VOB that
* produces multiple keys (RT)
*/
intf_WarnMsg( 3, "CSS: Title %d key: %02X %02X %02X %02X %02X\n",
intf_WarnMsg( 3, "CSS: Title %d key: %02X %02X %02X %02X %02X",
i_title+1,
title_key[i_highest].key[0],
title_key[i_highest].key[1],
......@@ -1071,7 +1143,7 @@ int CSSGetKeys( css_t * p_css )
memcpy( p_css->p_title_key[i_title].key,
title_key[i_highest].key, KEY_SIZE );
}
#endif
return 0;
}
......@@ -1086,7 +1158,8 @@ int CSSDescrambleSector( DVD_key_t key, u8* pi_sec )
unsigned int i_t1, i_t2, i_t3, i_t4, i_t5, i_t6;
u8* pi_end = pi_sec + 0x800;
if( pi_sec[0x14] & 0x30) // PES_scrambling_control
/* PES_scrambling_control */
if( pi_sec[0x14] & 0x30)
{
i_t1 = ((key)[0] ^ pi_sec[0x54]) | 0x100;
i_t2 = (key)[1] ^ pi_sec[0x55];
......
plugins/dvd/dvd_ifo.c
View file @ 5a796310
......@@ -2,7 +2,7 @@
* dvd_ifo.c: Functions for ifo parsing
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
* $Id: dvd_ifo.c,v 1.4 2001/02/09 03:51:42 stef Exp $
* $Id: dvd_ifo.c,v 1.5 2001/02/12 09:58:06 stef Exp $
*
* Author: Stphane Borel <stef@via.ecp.fr>
*
......@@ -1095,7 +1095,11 @@ void IfoRead( ifo_t* p_ifo )
int i;
off_t i_off;
/* Video Manager Initialization */
intf_WarnMsg( 2, "Ifo: Initializing VMG" );
p_ifo->vmg = ReadVMG( p_ifo );
/* Video Title Sets initialization */
p_ifo->p_vts = malloc( p_ifo->vmg.mat.i_tts_nb *sizeof(vts_t) );
if( p_ifo->p_vts == NULL )
{
......@@ -1106,10 +1110,11 @@ void IfoRead( ifo_t* p_ifo )
for( i=0 ; i<1/*p_ifo->vmg.mat.i_tts_nb*/ ; i++ )
{
intf_WarnMsg( 3, "######### VTS %d #############\n", i+1 );
intf_WarnMsg( 2, "Ifo: Initializing VTS %d", i+1 );
i_off = p_ifo->vmg.ptt_srpt.p_tts[i].i_ssector *DVD_LB_SIZE;
p_ifo->i_pos = lseek( p_ifo->i_fd, i_off, SEEK_SET );
/* FIXME : use udf filesystem to avoid this */
IfoFindVTS( p_ifo );
p_ifo->p_vts[i] = ReadVTS( p_ifo );
......
plugins/dvd/input_dvd.c
View file @ 5a796310
......@@ -10,7 +10,7 @@
* -dvd_udf to find files
*****************************************************************************
* Copyright (C) 1998-2001 VideoLAN
* $Id: input_dvd.c,v 1.7 2001/02/12 07:52:40 sam Exp $
* $Id: input_dvd.c,v 1.8 2001/02/12 09:58:06 stef Exp $
*
* Author: Stphane Borel <stef@via.ecp.fr>
*
......@@ -183,6 +183,12 @@ static void DVDInit( input_thread_t * p_input )
int i;
p_method->css = CSSInit( p_input->i_handle );
if( ( p_input->b_error = p_method->css.b_error ) )
{
fprintf( stderr, " boaruf \n" );
return;
}
p_method->css.i_title_nb = p_method->ifo.vmg.mat.i_tts_nb;
if( (p_method->css.p_title_key =
malloc( p_method->css.i_title_nb *sizeof(title_key_t) ) ) == NULL )
......
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