184 lines
5.6 KiB
C
184 lines
5.6 KiB
C
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/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __DRM_RIGHTS_MANAGER_H__
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#define __DRM_RIGHTS_MANAGER_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <openssl/aes.h>
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#include <drm_common_types.h>
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#include <parser_rel.h>
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#ifdef DRM_DEVICE_ARCH_ARM
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#define ANDROID_DRM_CORE_PATH "/data/drm/rights/"
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#define DRM_UID_FILE_PATH "/data/drm/rights/uid.txt"
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#else
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#define ANDROID_DRM_CORE_PATH "/home/user/golf/esmertec/device/out/debug/host/linux-x86/product/sim/data/data/com.android.drm.mobile1/"
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#define DRM_UID_FILE_PATH "/home/user/golf/esmertec/device/out/debug/host/linux-x86/product/sim/data/data/com.android.drm.mobile1/uid.txt"
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#endif
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#define EXTENSION_NAME_INFO ".info"
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#define GET_ID 1
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#define GET_UID 2
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#define GET_ROAMOUNT 1
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#define GET_ALL_RO 2
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#define SAVE_ALL_RO 3
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#define GET_A_RO 4
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#define SAVE_A_RO 5
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/**
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* Get the id or uid from the "uid.txt" file.
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*
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* \param Uid The content id for a specially DRM object.
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* \param id The id number managed by DRM engine for a specially DRM object.
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* \param option The option to get id or uid, the value includes: GET_ID, GET_UID.
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*
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* \return
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* -TRUE, if the operation successfully.
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* -FALSE, if the operation failed.
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*/
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int32_t drm_readFromUidTxt(uint8_t* Uid, int32_t* id, int32_t option);
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/**
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* Save or read the rights information on the "id.info" file.
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*
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* \param id The id number managed by DRM engine for a specially DRM object.
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* \param Ro The rights structure to save the rights information.
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* \param RoAmount The number of rights for this DRM object.
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* \param option The option include: GET_ROAMOUNT, GET_ALL_RO, SAVE_ALL_RO, GET_A_RO, SAVE_A_RO.
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*
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* \return
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* -TRUE, if the operation successfully.
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* -FALSE, if the operation failed.
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*/
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int32_t drm_writeOrReadInfo(int32_t id, T_DRM_Rights* Ro, int32_t* RoAmount, int32_t option);
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/**
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* Append a rights information to DRM engine storage.
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*
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* \param Ro The rights structure to save the rights information.
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*
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* return
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* -TRUE, if the operation successfully.
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* -FALSE, if the operation failed.
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*/
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int32_t drm_appendRightsInfo(T_DRM_Rights* rights);
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/**
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* Get the mex id number from the "uid.txt" file.
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*
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* \return
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* -an integer to indicate the max id number.
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* -(-1), if the operation failed.
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*/
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int32_t drm_getMaxIdFromUidTxt();
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/**
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* Remove the "id.info" file if all the rights for this DRM object has been deleted.
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*
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* \param id The id number managed by DRM engine for a specially DRM object.
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*
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* \return
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* -TRUE, if the operation successfully.
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* -FALSE, if the operation failed.
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*/
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int32_t drm_removeIdInfoFile(int32_t id);
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/**
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* Update the "uid.txt" file when delete the rights object.
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*
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* \param id The id number managed by DRM engine for a specially DRM object.
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*
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* \return
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* -TRUE, if the operation successfully.
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* -FALSE, if the operation failed.
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*/
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int32_t drm_updateUidTxtWhenDelete(int32_t id);
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/**
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* Get the CEK according the given content id.
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*
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* \param uid The content id for a specially DRM object.
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* \param KeyValue The buffer to save the CEK.
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*
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* \return
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* -TRUE, if the operation successfully.
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* -FALSE, if the operation failed.
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*/
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int32_t drm_getKey(uint8_t* uid, uint8_t* KeyValue);
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/**
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* Discard the padding bytes in DCF decrypted data.
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*
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* \param decryptedBuf The aes decrypted data buffer to be scanned.
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* \param decryptedBufLen The length of the buffer. And save the output result.
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*
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* \return
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* -0
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*/
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void drm_discardPaddingByte(uint8_t *decryptedBuf, int32_t *decryptedBufLen);
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/**
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* Decrypt the media data according the CEK.
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*
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* \param Buffer The buffer to decrypted and also used to save the output data.
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* \param BufferLen The length of the buffer data and also save the output data length.
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* \param key The structure of the CEK.
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*
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* \return
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* -0
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*/
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int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, AES_KEY *key);
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/**
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* Update the DCF data length according the CEK.
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*
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* \param pDcfLastData The last several byte for the DCF.
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* \param keyValue The CEK of the DRM content.
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* \param moreBytes Output the more bytes for discarded.
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*
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* \return
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* -TRUE, if the operation successfully.
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* -FALSE, if the operation failed.
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*/
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int32_t drm_updateDcfDataLen(uint8_t* pDcfLastData, uint8_t* keyValue, int32_t* moreBytes);
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/**
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* Check and update the rights for a specially DRM content.
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*
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* \param id The id number managed by DRM engine for a specially DRM object.
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* \param permission The permission to be check and updated.
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*
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* \return
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* -DRM_SUCCESS, if there is a valid rights and update it successfully.
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* -DRM_NO_RIGHTS, if there is no rights for this content.
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* -DRM_RIGHTS_PENDING, if the rights is pending.
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* -DRM_RIGHTS_EXPIRED, if the rights has expired.
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* -DRM_RIGHTS_FAILURE, if there is some other error occur.
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*/
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int32_t drm_checkRoAndUpdate(int32_t id, int32_t permission);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __DRM_RIGHTS_MANAGER_H__ */
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