Current File : //data/old/usr/local/include/gpac/ismacryp.h
/*
* GPAC - Multimedia Framework C SDK
*
* Authors: Jean Le Feuvre
* Copyright (c) Telecom ParisTech 2000-2012
* All rights reserved
*
* This file is part of GPAC / Authoring Tools sub-project
*
* GPAC is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GPAC 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _GF_ISMACRYP_H_
#define _GF_ISMACRYP_H_
#ifdef __cplusplus
extern "C" {
#endif
/*!
* \file <gpac/ismacryp.h>
* \brief Utility tools for ISMA and Common Encryption.
*/
/*!
* \addtogroup crypt_grp
* \ingroup media_grp
* \brief Utility tools for ISMA and Common Encryption.
*
*This section documents the encryption and decryption of ISOBMF files according to ISMA and CENC specifications.
* @{
*/
#include <gpac/isomedia.h>
/*loads key and salt from a LOCAL gpac-DRM file (cf MP4Box doc)*/
GF_Err gf_ismacryp_gpac_get_info(u32 stream_id, char *drm_file, char *key, char *salt);
/*loads key and salt for MPEG4IP protected files*/
Bool gf_ismacryp_mpeg4ip_get_info(char *kms_uri, char *key, char *salt);
enum
{
/*ISMA E&A encryption*/
GF_CRYPT_ISMA_CRYPT_TYPE = GF_4CC( 'i', 'A', 'E', 'C' ),
/*CENC CTR-128 encryption*/
GF_CRYPT_CENC_CRYPT_TYPE = GF_4CC('c','e','n','c'),
/*CENC CBC-128 encryption*/
GF_CRYPT_CBC1_CRYPT_TYPE = GF_4CC('c','b','c','1'),
/*Adobe CBC-128 encryption*/
GF_CRYPT_ADOBE_CRYPT_TYPE = GF_4CC('a','d','k','m'),
/*CENC CTR-128 pattern encryption*/
GF_CRYPT_CENS_CRYPT_TYPE = GF_4CC('c','e','n','s'),
/*CENC CBC-128 pattern encryption*/
GF_CRYPT_CBCS_CRYPT_TYPE = GF_4CC('c','b','c','s'),
};
enum
{
/*no selective encryption*/
GF_CRYPT_SELENC_NONE = 0,
/*only encrypts RAP samples*/
GF_CRYPT_SELENC_RAP = 1,
/*only encrypts non-RAP samples*/
GF_CRYPT_SELENC_NON_RAP = 2,
/*selective encryption of random samples*/
GF_CRYPT_SELENC_RAND = 3,
/*selective encryption of a random sample in given range*/
GF_CRYPT_SELENC_RAND_RANGE = 4,
/*selective encryption of first sample in given range*/
GF_CRYPT_SELENC_RANGE = 5,
/*encryption of all samples but the preview range*/
GF_CRYPT_SELENC_PREVIEW = 6,
/*encryption of no samples*/
GF_CRYPT_SELENC_CLEAR = 7,
};
typedef struct
{
/*0: ISMACryp - 1: OMA DRM*/
u32 enc_type;//for now only used for ISMACrypt
u32 trackID;
unsigned char key[16];
unsigned char salt[16];
/*the rest is only used for encryption*/
char KMS_URI[5000];
char Scheme_URI[5000];
/*selecive encryption type*/
u32 sel_enc_type;
u32 sel_enc_range;
/*IPMP signaling: 0: none, 1: IPMP, 2: IPMPX
when IPMP signaling is enabled, the OD stream will be updated with
IPMP Update commands*/
u32 ipmp_type;
/*if not set and IPMP enabled, defaults to TrackID*/
u32 ipmp_desc_id;
/*type of box where sample auxiliary informations is saved, or 0 in case of ISMACrypt (it will be written in samples)*/
u32 sai_saved_box_type;
/*OMA extensions*/
/*0: none, 1: AES CBC, 2: AES CTR*/
u8 encryption;
char TextualHeaders[5000];
u32 TextualHeadersLen;
char TransactionID[17];
/*CENC extensions*/
u32 IsEncrypted;
u8 IV_size;
bin128 default_KID;
u32 KID_count;
bin128 *KIDs;
bin128 *keys;
/*IV of first sample in track*/
unsigned char first_IV[16];
u32 defaultKeyIdx;
u32 keyRoll;
u8 crypt_byte_block, skip_byte_block;
u8 constant_IV_size;
unsigned char constant_IV[16];
//true if using AES-CTR mode, false if using AES-CBC mode
Bool ctr_mode;
u32 cenc_scheme_type;
char metadata[5000];
u32 metadata_len;
} GF_TrackCryptInfo;
#if !defined(GPAC_DISABLE_MCRYPT) && !defined(GPAC_DISABLE_ISOM_WRITE)
/*encrypts track - logs, progress: info callbacks, NULL for default*/
GF_Err gf_ismacryp_encrypt_track(GF_ISOFile *mp4, GF_TrackCryptInfo *tci, void (*progress)(void *cbk, u64 done, u64 total), void *cbk);
/*decrypts track - logs, progress: info callbacks, NULL for default*/
GF_Err gf_ismacryp_decrypt_track(GF_ISOFile *mp4, GF_TrackCryptInfo *tci, void (*progress)(void *cbk, u64 done, u64 total), void *cbk);
/*Common Encryption*/
/*AES-CTR*/
GF_Err gf_cenc_encrypt_track(GF_ISOFile *mp4, GF_TrackCryptInfo *tci, void (*progress)(void *cbk, u64 done, u64 total), void *cbk);
GF_Err gf_cenc_decrypt_track(GF_ISOFile *mp4, GF_TrackCryptInfo *tci, void (*progress)(void *cbk, u64 done, u64 total), void *cbk);
/*AES-CBC*/
GF_Err gf_cbc_encrypt_track(GF_ISOFile *mp4, GF_TrackCryptInfo *tci, void (*progress)(void *cbk, u64 done, u64 total), void *cbk);
GF_Err gf_cbc_decrypt_track(GF_ISOFile *mp4, GF_TrackCryptInfo *tci, void (*progress)(void *cbk, u64 done, u64 total), void *cbk);
/*ADOBE*/
GF_Err gf_adobe_encrypt_track(GF_ISOFile *mp4, GF_TrackCryptInfo *tci, void (*progress)(void *cbk, u64 done, u64 total), void *cbk);
GF_Err gf_adobe_decrypt_track(GF_ISOFile *mp4, GF_TrackCryptInfo *tci, void (*progress)(void *cbk, u64 done, u64 total), void *cbk);
/*decrypt a file
@drm_file: location of DRM data (cf MP4Box doc).
@LogMsg: redirection for message or NULL for default
*/
GF_Err gf_decrypt_file(GF_ISOFile *mp4file, const char *drm_file);
/*Crypt a the file
@drm_file: location of DRM data.
@LogMsg: redirection for message or NULL for default
*/
GF_Err gf_crypt_file(GF_ISOFile *mp4file, const char *drm_file);
#endif /*!defined(GPAC_DISABLE_MCRYPT) && !defined(GPAC_DISABLE_ISOM_WRITE)*/
/*! @} */
#ifdef __cplusplus
}
#endif
#endif /*_GF_ISMACRYP_H_*/
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