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Diffstat (limited to 'libdvdcss/libdvdcss.c')
| -rw-r--r-- | libdvdcss/libdvdcss.c | 814 |
1 files changed, 0 insertions, 814 deletions
diff --git a/libdvdcss/libdvdcss.c b/libdvdcss/libdvdcss.c deleted file mode 100644 index e3b60e1fe2..0000000000 --- a/libdvdcss/libdvdcss.c +++ /dev/null @@ -1,814 +0,0 @@ -/* libdvdcss.c: DVD reading library. - * - * Authors: Stéphane Borel <stef@via.ecp.fr> - * Sam Hocevar <sam@zoy.org> - * Håkan Hjort <d95hjort@dtek.chalmers.se> - * - * Copyright (C) 1998-2008 VideoLAN - * $Id$ - * - * This library is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this library; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -/** - * \mainpage libdvdcss developer documentation - * - * \section intro Introduction - * - * \e libdvdcss is a simple library designed for accessing DVDs like a block - * device without having to bother about the decryption. The important features - * are: - * \li portability: currently supported platforms are GNU/Linux, FreeBSD, - * NetBSD, OpenBSD, BSD/OS, BeOS, Windows 95/98, Windows NT/2000, MacOS X, - * Solaris, HP-UX and OS/2. - * \li adaptability: unlike most similar projects, libdvdcss doesn't require - * the region of your drive to be set and will try its best to read from - * the disc even in the case of a region mismatch. - * \li simplicity: a DVD player can be built around the \e libdvdcss API using - * no more than 4 or 5 library calls. - * - * \e libdvdcss is free software, released under the General Public License. - * This ensures that \e libdvdcss remains free and used only with free - * software. - * - * \section api The libdvdcss API - * - * The complete \e libdvdcss programming interface is documented in the - * dvdcss.h file. - * - * \section env Environment variables - * - * Some environment variables can be used to change the behaviour of - * \e libdvdcss without having to modify the program which uses it. These - * variables are: - * - * \li \b DVDCSS_VERBOSE: sets the verbosity level. - * - \c 0 outputs no messages at all. - * - \c 1 outputs error messages to stderr. - * - \c 2 outputs error messages and debug messages to stderr. - * - * \li \b DVDCSS_METHOD: sets the authentication and decryption method - * that \e libdvdcss will use to read scrambled discs. Can be one - * of \c title, \c key or \c disc. - * - \c key is the default method. \e libdvdcss will use a set of - * calculated player keys to try and get the disc key. This can fail - * if the drive does not recognize any of the player keys. - * - \c disc is a fallback method when \c key has failed. Instead of - * using player keys, \e libdvdcss will crack the disc key using - * a brute force algorithm. This process is CPU intensive and requires - * 64 MB of memory to store temporary data. - * - \c title is the fallback when all other methods have failed. It does - * not rely on a key exchange with the DVD drive, but rather uses a - * crypto attack to guess the title key. On rare cases this may fail - * because there is not enough encrypted data on the disc to perform - * a statistical attack, but in the other hand it is the only way to - * decrypt a DVD stored on a hard disc, or a DVD with the wrong region - * on an RPC2 drive. - * - * \li \b DVDCSS_RAW_DEVICE: specify the raw device to use. Exact usage will - * depend on your operating system, the Linux utility to set up raw devices - * is \c raw(8) for instance. Please note that on most operating systems, - * using a raw device requires highly aligned buffers: Linux requires a - * 2048 bytes alignment (which is the size of a DVD sector). - * - * \li \b DVDCSS_CACHE: specify a directory in which to store title key - * values. This will speed up descrambling of DVDs which are in the - * cache. The DVDCSS_CACHE directory is created if it does not exist, - * and a subdirectory is created named after the DVD's title or - * manufacturing date. If DVDCSS_CACHE is not set or is empty, \e libdvdcss - * will use the default value which is "${HOME}/.dvdcss/" under Unix and - * "C:\Documents and Settings\$USER\Application Data\dvdcss\" under Win32. - * The special value "off" disables caching. - */ - -/* - * Preamble - */ -#include "config.h" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/types.h> -#include <sys/stat.h> -#ifdef HAVE_SYS_PARAM_H -# include <sys/param.h> -#endif -#ifdef HAVE_PWD_H -# include <pwd.h> -#endif -#include <fcntl.h> -#include <errno.h> - -#ifdef HAVE_UNISTD_H -# include <unistd.h> -#endif - -#ifdef HAVE_LIMITS_H -# include <limits.h> -#endif - -#ifdef HAVE_DIRECT_H -# include <direct.h> -#endif - -#include "dvdcss/dvdcss.h" - -#include "common.h" -#include "css.h" -#include "libdvdcss.h" -#include "ioctl.h" -#include "device.h" - -/** - * \brief Symbol for version checks. - * - * The name of this symbol contains the library major number, which makes it - * easy to check which \e libdvdcss development headers are installed on the - * system with tools such as autoconf. - * - * The variable itself contains the exact version number of the library, - * which can be useful for specific feature needs. - */ -char * dvdcss_interface_2 = VERSION; - -/** - * \brief Open a DVD device or directory and return a dvdcss instance. - * - * \param psz_target a string containing the target name, for instance - * "/dev/hdc" or "E:". - * \return a handle to a dvdcss instance or NULL on error. - * - * Initialize the \e libdvdcss library and open the requested DVD device or - * directory. \e libdvdcss checks whether ioctls can be performed on the disc, - * and when possible, the disc key is retrieved. - * - * dvdcss_open() returns a handle to be used for all subsequent \e libdvdcss - * calls. If an error occurred, NULL is returned. - */ -LIBDVDCSS_EXPORT dvdcss_t dvdcss_open ( char *psz_target ) -{ - char psz_buffer[PATH_MAX]; - int i_ret; - - char *psz_method = getenv( "DVDCSS_METHOD" ); - char *psz_verbose = getenv( "DVDCSS_VERBOSE" ); - char *psz_cache = getenv( "DVDCSS_CACHE" ); -#if !defined(WIN32) && !defined(SYS_OS2) - char *psz_raw_device = getenv( "DVDCSS_RAW_DEVICE" ); -#endif - - dvdcss_t dvdcss; - - /* - * Allocate the library structure - */ - dvdcss = malloc( sizeof( struct dvdcss_s ) ); - if( dvdcss == NULL ) - { - return NULL; - } - - /* - * Initialize structure with default values - */ -#if !defined(WIN32) && !defined(SYS_OS2) - dvdcss->i_raw_fd = -1; -#endif - dvdcss->p_titles = NULL; - dvdcss->psz_device = (char *)strdup( psz_target ); - dvdcss->psz_error = "no error"; - dvdcss->i_method = DVDCSS_METHOD_KEY; - dvdcss->psz_cachefile[0] = '\0'; - dvdcss->b_debug = 0; - dvdcss->b_errors = 0; - - /* - * Find verbosity from DVDCSS_VERBOSE environment variable - */ - if( psz_verbose != NULL ) - { - int i = atoi( psz_verbose ); - - if( i >= 2 ) dvdcss->b_debug = i; - if( i >= 1 ) dvdcss->b_errors = 1; - } - - /* - * Find method from DVDCSS_METHOD environment variable - */ - if( psz_method != NULL ) - { - if( !strncmp( psz_method, "key", 4 ) ) - { - dvdcss->i_method = DVDCSS_METHOD_KEY; - } - else if( !strncmp( psz_method, "disc", 5 ) ) - { - dvdcss->i_method = DVDCSS_METHOD_DISC; - } - else if( !strncmp( psz_method, "title", 5 ) ) - { - dvdcss->i_method = DVDCSS_METHOD_TITLE; - } - else - { - print_error( dvdcss, "unknown decrypt method, please choose " - "from 'title', 'key' or 'disc'" ); - free( dvdcss->psz_device ); - free( dvdcss ); - return NULL; - } - } - - /* - * If DVDCSS_CACHE was not set, try to guess a default value - */ - if( psz_cache == NULL || psz_cache[0] == '\0' ) - { -#ifdef HAVE_DIRECT_H - typedef HRESULT( WINAPI *SHGETFOLDERPATH ) - ( HWND, int, HANDLE, DWORD, LPTSTR ); - -# define CSIDL_FLAG_CREATE 0x8000 -# define CSIDL_APPDATA 0x1A -# define SHGFP_TYPE_CURRENT 0 - - char psz_home[MAX_PATH]; - HINSTANCE p_dll; - SHGETFOLDERPATH p_getpath; - - *psz_home = '\0'; - - /* Load the shfolder dll to retrieve SHGetFolderPath */ - p_dll = LoadLibrary( "shfolder.dll" ); - if( p_dll ) - { - p_getpath = (void*)GetProcAddress( p_dll, "SHGetFolderPathA" ); - if( p_getpath ) - { - /* Get the "Application Data" folder for the current user */ - if( p_getpath( NULL, CSIDL_APPDATA | CSIDL_FLAG_CREATE, - NULL, SHGFP_TYPE_CURRENT, psz_home ) == S_OK ) - { - FreeLibrary( p_dll ); - } - else - { - *psz_home = '\0'; - } - } - FreeLibrary( p_dll ); - } - - /* Cache our keys in - * C:\Documents and Settings\$USER\Application Data\dvdcss\ */ - if( *psz_home ) - { - snprintf( psz_buffer, PATH_MAX, "%s/dvdcss", psz_home ); - psz_buffer[PATH_MAX-1] = '\0'; - psz_cache = psz_buffer; - } -#else - char *psz_home = NULL; -# ifdef HAVE_PWD_H - struct passwd *p_pwd; - - /* Try looking in password file for home dir. */ - p_pwd = getpwuid(getuid()); - if( p_pwd ) - { - psz_home = p_pwd->pw_dir; - } -# endif - - if( psz_home == NULL ) - { - psz_home = getenv( "HOME" ); - } - if( psz_home == NULL ) - { - psz_home = getenv( "USERPROFILE" ); - } - - /* Cache our keys in ${HOME}/.dvdcss/ */ - if( psz_home ) - { - int home_pos = 0; - -#ifdef SYS_OS2 - if( *psz_home == '/' || *psz_home == '\\') - { - char *psz_unixroot = getenv("UNIXROOT"); - - if( psz_unixroot && - psz_unixroot[0] && - psz_unixroot[1] == ':' && - psz_unixroot[2] == '\0') - { - strcpy( psz_buffer, psz_unixroot ); - home_pos = 2; - } - } -#endif - snprintf( psz_buffer + home_pos, PATH_MAX - home_pos, - "%s/.dvdcss", psz_home ); - psz_buffer[PATH_MAX-1] = '\0'; - psz_cache = psz_buffer; - } -#endif - } - - /* - * Find cache dir from the DVDCSS_CACHE environment variable - */ - if( psz_cache != NULL ) - { - if( psz_cache[0] == '\0' || !strcmp( psz_cache, "off" ) ) - { - psz_cache = NULL; - } - /* Check that we can add the ID directory and the block filename */ - else if( strlen( psz_cache ) + 1 + 32 + 1 + (KEY_SIZE * 2) + 10 + 1 - > PATH_MAX ) - { - print_error( dvdcss, "cache directory name is too long" ); - psz_cache = NULL; - } - } - - /* - * Open device - */ - _dvdcss_check( dvdcss ); - i_ret = _dvdcss_open( dvdcss ); - if( i_ret < 0 ) - { - free( dvdcss->psz_device ); - free( dvdcss ); - return NULL; - } - - dvdcss->b_scrambled = 1; /* Assume the worst */ - dvdcss->b_ioctls = _dvdcss_use_ioctls( dvdcss ); - - if( dvdcss->b_ioctls ) - { - _dvdcss_test( dvdcss ); - } - - /* If disc is CSS protected and the ioctls work, authenticate the drive */ - if( dvdcss->b_scrambled && dvdcss->b_ioctls ) - { - i_ret = _dvdcss_disckey( dvdcss ); - - if( i_ret < 0 ) - { - print_debug( dvdcss, "could not get disc key" ); - } - } - else - { - memset( dvdcss->css.p_disc_key, 0, KEY_SIZE ); - } - - /* If the cache is enabled, write the cache directory tag */ - if( psz_cache ) - { - char *psz_tag = "Signature: 8a477f597d28d172789f06886806bc55\r\n" - "# This file is a cache directory tag created by libdvdcss.\r\n" - "# For information about cache directory tags, see:\r\n" - "# http://www.brynosaurus.com/cachedir/\r\n"; - char psz_tagfile[PATH_MAX + 1 + 12 + 1]; - int i_fd; - - sprintf( psz_tagfile, "%s/CACHEDIR.TAG", psz_cache ); - i_fd = open( psz_tagfile, O_RDWR|O_CREAT, 0644 ); - if( i_fd >= 0 ) - { - write( i_fd, psz_tag, strlen(psz_tag) ); - close( i_fd ); - } - } - - /* If the cache is enabled, extract a unique disc ID */ - if( psz_cache ) - { - uint8_t p_sector[DVDCSS_BLOCK_SIZE]; - char psz_key[1 + KEY_SIZE * 2 + 1]; - char *psz_title; - uint8_t *psz_serial; - int i; - - /* We read sector 0. If it starts with 0x000001ba (BE), we are - * reading a VOB file, and we should not cache anything. */ - - i_ret = dvdcss->pf_seek( dvdcss, 0 ); - if( i_ret != 0 ) - { - goto nocache; - } - - i_ret = dvdcss->pf_read( dvdcss, p_sector, 1 ); - if( i_ret != 1 ) - { - goto nocache; - } - - if( p_sector[0] == 0x00 && p_sector[1] == 0x00 - && p_sector[2] == 0x01 && p_sector[3] == 0xba ) - { - goto nocache; - } - - /* The data we are looking for is at sector 16 (32768 bytes): - * - offset 40: disc title (32 uppercase chars) - * - offset 813: manufacturing date + serial no (16 digits) */ - - i_ret = dvdcss->pf_seek( dvdcss, 16 ); - if( i_ret != 16 ) - { - goto nocache; - } - - i_ret = dvdcss->pf_read( dvdcss, p_sector, 1 ); - if( i_ret != 1 ) - { - goto nocache; - } - - /* Get the disc title */ - psz_title = (char *)p_sector + 40; - psz_title[32] = '\0'; - - for( i = 0 ; i < 32 ; i++ ) - { - if( psz_title[i] <= ' ' ) - { - psz_title[i] = '\0'; - break; - } - else if( psz_title[i] == '/' || psz_title[i] == '\\' ) - { - psz_title[i] = '-'; - } - } - - /* Get the date + serial */ - psz_serial = p_sector + 813; - psz_serial[16] = '\0'; - - /* Check that all characters are digits, otherwise convert. */ - for( i = 0 ; i < 16 ; i++ ) - { - if( psz_serial[i] < '0' || psz_serial[i] > '9' ) - { - char psz_tmp[16 + 1]; - sprintf( psz_tmp, - "%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x", - psz_serial[0], psz_serial[1], psz_serial[2], - psz_serial[3], psz_serial[4], psz_serial[5], - psz_serial[6], psz_serial[7] ); - memcpy( psz_serial, psz_tmp, 16 ); - break; - } - } - - /* Get disk key, since some discs have got same title, manufacturing - * date and serial number, but different keys */ - if( dvdcss->b_scrambled ) - { - psz_key[0] = '-'; - for( i = 0; i < KEY_SIZE; i++ ) - { - sprintf( &psz_key[1+i*2], "%.2x", dvdcss->css.p_disc_key[i] ); - } - psz_key[1 + KEY_SIZE * 2] = '\0'; - } - else - { - psz_key[0] = 0; - } - - /* We have a disc name or ID, we can create the cache dir */ - i = sprintf( dvdcss->psz_cachefile, "%s", psz_cache ); -#if !defined( WIN32 ) || defined( SYS_CYGWIN ) - i_ret = mkdir( dvdcss->psz_cachefile, 0755 ); -#else - i_ret = mkdir( dvdcss->psz_cachefile ); -#endif - if( i_ret < 0 && errno != EEXIST ) - { - print_error( dvdcss, "failed creating cache directory" ); - dvdcss->psz_cachefile[0] = '\0'; - goto nocache; - } - - i += sprintf( dvdcss->psz_cachefile + i, "/%s-%s%s", psz_title, - psz_serial, psz_key ); -#if !defined( WIN32 ) || defined( SYS_CYGWIN ) - i_ret = mkdir( dvdcss->psz_cachefile, 0755 ); -#else - i_ret = mkdir( dvdcss->psz_cachefile ); -#endif - if( i_ret < 0 && errno != EEXIST ) - { - print_error( dvdcss, "failed creating cache subdirectory" ); - dvdcss->psz_cachefile[0] = '\0'; - goto nocache; - } - i += sprintf( dvdcss->psz_cachefile + i, "/"); - - /* Pointer to the filename we will use. */ - dvdcss->psz_block = dvdcss->psz_cachefile + i; - - print_debug( dvdcss, "using CSS key cache dir: %s", - dvdcss->psz_cachefile ); - } - nocache: - -#if !defined(WIN32) && !defined(SYS_OS2) - if( psz_raw_device != NULL ) - { - _dvdcss_raw_open( dvdcss, psz_raw_device ); - } -#endif - - /* Seek at the beginning, just for safety. */ - dvdcss->pf_seek( dvdcss, 0 ); - - return dvdcss; -} - -/** - * \brief Return a string containing the latest error that occurred in the - * given \e libdvdcss instance. - * - * \param dvdcss a \e libdvdcss instance. - * \return a null-terminated string containing the latest error message. - * - * This function returns a constant string containing the latest error that - * occurred in \e libdvdcss. It can be used to format error messages at your - * convenience in your application. - */ -LIBDVDCSS_EXPORT char * dvdcss_error ( dvdcss_t dvdcss ) -{ - return dvdcss->psz_error; -} - -/** - * \brief Seek in the disc and change the current key if requested. - * - * \param dvdcss a \e libdvdcss instance. - * \param i_blocks an absolute block offset to seek to. - * \param i_flags #DVDCSS_NOFLAGS, optionally ored with one of #DVDCSS_SEEK_KEY - * or #DVDCSS_SEEK_MPEG. - * \return the new position in blocks, or a negative value in case an error - * happened. - * - * This function seeks to the requested position, in logical blocks. - * - * You typically set \p i_flags to #DVDCSS_NOFLAGS when seeking in a .IFO. - * - * If #DVDCSS_SEEK_MPEG is specified in \p i_flags and if \e libdvdcss finds it - * reasonable to do so (ie, if the dvdcss method is not "title"), the current - * title key will be checked and a new one will be calculated if necessary. - * This flag is typically used when reading data from a VOB. - * - * If #DVDCSS_SEEK_KEY is specified, the title key will be always checked, - * even with the "title" method. This is equivalent to using the now - * deprecated dvdcss_title() call. This flag is typically used when seeking - * in a new title. - */ -LIBDVDCSS_EXPORT int dvdcss_seek ( dvdcss_t dvdcss, int i_blocks, int i_flags ) -{ - /* title cracking method is too slow to be used at each seek */ - if( ( ( i_flags & DVDCSS_SEEK_MPEG ) - && ( dvdcss->i_method != DVDCSS_METHOD_TITLE ) ) - || ( i_flags & DVDCSS_SEEK_KEY ) ) - { - /* check the title key */ - if( _dvdcss_title( dvdcss, i_blocks ) ) - { - return -1; - } - } - - return dvdcss->pf_seek( dvdcss, i_blocks ); -} - -/** - * \brief Read from the disc and decrypt data if requested. - * - * \param dvdcss a \e libdvdcss instance. - * \param p_buffer a buffer that will contain the data read from the disc. - * \param i_blocks the amount of blocks to read. - * \param i_flags #DVDCSS_NOFLAGS, optionally ored with #DVDCSS_READ_DECRYPT. - * \return the amount of blocks read, or a negative value in case an - * error happened. - * - * This function reads \p i_blocks logical blocks from the DVD. - * - * You typically set \p i_flags to #DVDCSS_NOFLAGS when reading data from a - * .IFO file on the DVD. - * - * If #DVDCSS_READ_DECRYPT is specified in \p i_flags, dvdcss_read() will - * automatically decrypt scrambled sectors. This flag is typically used when - * reading data from a .VOB file on the DVD. It has no effect on unscrambled - * discs or unscrambled sectors, and can be safely used on those. - * - * \warning dvdcss_read() expects to be able to write \p i_blocks * - * #DVDCSS_BLOCK_SIZE bytes in \p p_buffer. - */ -LIBDVDCSS_EXPORT int dvdcss_read ( dvdcss_t dvdcss, void *p_buffer, - int i_blocks, - int i_flags ) -{ - int i_ret, i_index; - - i_ret = dvdcss->pf_read( dvdcss, p_buffer, i_blocks ); - - if( i_ret <= 0 - || !dvdcss->b_scrambled - || !(i_flags & DVDCSS_READ_DECRYPT) ) - { - return i_ret; - } - - if( ! memcmp( dvdcss->css.p_title_key, "\0\0\0\0\0", 5 ) ) - { - /* For what we believe is an unencrypted title, - * check that there are no encrypted blocks */ - for( i_index = i_ret; i_index; i_index-- ) - { - if( ((uint8_t*)p_buffer)[0x14] & 0x30 ) - { - print_error( dvdcss, "no key but found encrypted block" ); - /* Only return the initial range of unscrambled blocks? */ - /* or fail completely? return 0; */ - break; - } - p_buffer = (void *) ((uint8_t *)p_buffer + DVDCSS_BLOCK_SIZE); - } - } - else - { - /* Decrypt the blocks we managed to read */ - for( i_index = i_ret; i_index; i_index-- ) - { - _dvdcss_unscramble( dvdcss->css.p_title_key, p_buffer ); - ((uint8_t*)p_buffer)[0x14] &= 0x8f; - p_buffer = (void *) ((uint8_t *)p_buffer + DVDCSS_BLOCK_SIZE); - } - } - - return i_ret; -} - -/** - * \brief Read from the disc into multiple buffers and decrypt data if - * requested. - * - * \param dvdcss a \e libdvdcss instance. - * \param p_iovec a pointer to an array of iovec structures that will contain - * the data read from the disc. - * \param i_blocks the amount of blocks to read. - * \param i_flags #DVDCSS_NOFLAGS, optionally ored with #DVDCSS_READ_DECRYPT. - * \return the amount of blocks read, or a negative value in case an - * error happened. - * - * This function reads \p i_blocks logical blocks from the DVD and writes them - * to an array of iovec structures. - * - * You typically set \p i_flags to #DVDCSS_NOFLAGS when reading data from a - * .IFO file on the DVD. - * - * If #DVDCSS_READ_DECRYPT is specified in \p i_flags, dvdcss_readv() will - * automatically decrypt scrambled sectors. This flag is typically used when - * reading data from a .VOB file on the DVD. It has no effect on unscrambled - * discs or unscrambled sectors, and can be safely used on those. - * - * \warning dvdcss_readv() expects to be able to write \p i_blocks * - * #DVDCSS_BLOCK_SIZE bytes in the buffers pointed by \p p_iovec. - * Moreover, all iov_len members of the iovec structures should be - * multiples of #DVDCSS_BLOCK_SIZE. - */ -LIBDVDCSS_EXPORT int dvdcss_readv ( dvdcss_t dvdcss, void *p_iovec, - int i_blocks, - int i_flags ) -{ - struct iovec *_p_iovec = (struct iovec *)p_iovec; - int i_ret, i_index; - void *iov_base; - size_t iov_len; - - i_ret = dvdcss->pf_readv( dvdcss, _p_iovec, i_blocks ); - - if( i_ret <= 0 - || !dvdcss->b_scrambled - || !(i_flags & DVDCSS_READ_DECRYPT) ) - { - return i_ret; - } - - /* Initialize loop for decryption */ - iov_base = _p_iovec->iov_base; - iov_len = _p_iovec->iov_len; - - /* Decrypt the blocks we managed to read */ - for( i_index = i_ret; i_index; i_index-- ) - { - /* Check that iov_len is a multiple of 2048 */ - if( iov_len & 0x7ff ) - { - return -1; - } - - while( iov_len == 0 ) - { - _p_iovec++; - iov_base = _p_iovec->iov_base; - iov_len = _p_iovec->iov_len; - } - - _dvdcss_unscramble( dvdcss->css.p_title_key, iov_base ); - ((uint8_t*)iov_base)[0x14] &= 0x8f; - - iov_base = (void *) ((uint8_t*)iov_base + DVDCSS_BLOCK_SIZE); - iov_len -= DVDCSS_BLOCK_SIZE; - } - - return i_ret; -} - -/** - * \brief Close the DVD and clean up the library. - * - * \param dvdcss a \e libdvdcss instance. - * \return zero in case of success, a negative value otherwise. - * - * This function closes the DVD device and frees all the memory allocated - * by \e libdvdcss. On return, the #dvdcss_t is invalidated and may not be - * used again. - */ -LIBDVDCSS_EXPORT int dvdcss_close ( dvdcss_t dvdcss ) -{ - dvd_title_t *p_title; - int i_ret; - - /* Free our list of keys */ - p_title = dvdcss->p_titles; - while( p_title ) - { - dvd_title_t *p_tmptitle = p_title->p_next; - free( p_title ); - p_title = p_tmptitle; - } - - i_ret = _dvdcss_close( dvdcss ); - - if( i_ret < 0 ) - { - return i_ret; - } - - free( dvdcss->psz_device ); - free( dvdcss ); - - return 0; -} - -/* - * Deprecated. See dvdcss_seek(). - */ -#undef dvdcss_title -LIBDVDCSS_EXPORT int dvdcss_title ( dvdcss_t dvdcss, int i_block ) -{ - return _dvdcss_title( dvdcss, i_block ); -} - -/** - * \brief Return 1 if the DVD is scrambled, 0 otherwise. - * - * \param dvdcss a \e libdvdcss instance. - * \return 1 if the DVD is scrambled, 0 otherwise. - * - * This function returns whether the DVD is scrambled. - */ -LIBDVDCSS_EXPORT int dvdcss_is_scrambled ( dvdcss_t dvdcss ) -{ - return dvdcss->b_scrambled; -} - |