| /********************************************************************** |
| * Copyright (C) 2011 Intel Corporation. All rights reserved. |
| |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| **********************************************************************/ |
| |
| /*! |
| * NOTE: Don't include this file. It is recommended to include sepdrm.h |
| */ |
| #ifndef __WV_DRM_API_H__ |
| #define __WV_DRM_API_H__ |
| |
| #include <inttypes.h> |
| #include "drm_common_api.h" |
| #include "wv_fkp.h" |
| |
| /*! |
| * Defines |
| */ |
| #define NEW_FRAME_FLAG (1) |
| #define PREV_PACKET_PARTIAL_BLOCK_FLAG (1 << 1) |
| #define CLEAR_CONTENT_FLAG (1 << 2) |
| |
| /*! |
| * Structs |
| */ |
| |
| /* |
| * This structure is used to provide necessary information for Widevine audio |
| * ciphertext decryption. |
| * |
| * The members are: |
| * |
| * iv - AES initialization vector. |
| * input_ciphertext_size - Input ciphertext data size in bytes. |
| * p_input_ciphertext - Pointer to the input ciphertext data buffer. |
| * output_plaintext_size - Output plaintext data size in bytes. |
| * p_output_plaintext - Pointer to the output plaintext data buffer. |
| */ |
| struct drm_wv_audio_data |
| { |
| uint8_t iv[AES_IV_COUNTER_SIZE_IN_BYTES]; |
| uint32_t input_ciphertext_size; |
| uint8_t *p_input_ciphertext; |
| uint32_t output_plaintext_size; |
| uint8_t *p_output_plaintext; |
| }; |
| |
| |
| /* |
| * This structure is used to provide necessary information for Widevine video |
| * ciphertext decryption. |
| * |
| * The members are: |
| * |
| * iv - AES initialization vector. |
| * input_ciphertext_size - Input ciphertext data size in bytes. |
| * p_input_ciphertext - Pointer to the input ciphertext data. |
| */ |
| struct drm_wv_video_cipher |
| { |
| uint8_t iv[AES_IV_COUNTER_SIZE_IN_BYTES]; |
| uint32_t input_ciphertext_size; |
| uint8_t *p_input_ciphertext; |
| uint8_t flags; |
| uint8_t *p_output_enc_ciphertext; |
| uint32_t output_ciphertext_size; |
| }; |
| |
| struct drm_wv_nalu_headers |
| { |
| uint32_t frame_size; |
| uint32_t parse_size; |
| uint8_t *p_enc_ciphertext; |
| uint32_t hdrs_buf_len; |
| uint8_t *p_hdrs_buf; |
| }; |
| |
| /*! |
| * Functions |
| */ |
| |
| |
| /* |
| * Set Widevine Asset Key |
| */ |
| uint32_t drm_wv_set_entitlementkey( |
| uint8_t *emm_keyptr, |
| uint32_t emm_keylen); |
| |
| /* |
| * Derive Widevine Control Word |
| */ |
| uint32_t drm_wv_derive_controlword( |
| uint8_t *cw_ptr, |
| uint32_t cw_len, |
| uint32_t *flags_ptr); |
| |
| /* |
| * Get Widevine Keybox infomation |
| * Retrieve the encypted kbox data and decrypt the encrypted kbox data |
| */ |
| uint32_t drm_wv_get_keyboxinfo( |
| uint8_t *key_data, |
| uint32_t *key_data_size, |
| uint8_t *device_id, |
| uint32_t *device_id_size); |
| |
| |
| /*! |
| *@brief Create a widevine session |
| * |
| */ |
| uint32_t drm_wv_create_session( |
| uint32_t *session_id); |
| |
| |
| /* |
| * @brief Creates a Widevine session for HLS content. |
| * @param[out] pSessionID Pointer to a variable that contains the session's ID |
| * number. |
| */ |
| uint32_t drm_wv_hls_create_session( |
| uint32_t *session_id); |
| |
| /* |
| * @brief Decrypts Widevine encrypted audio data |
| * |
| * @param session_id DRM Session ID number |
| * @param audio_info Pointer to a buffer containing Widevine audio information |
| * |
| * @return DRM_SUCCESSFUL The Widevine audio ciphertext was decrypted |
| */ |
| uint32_t drm_wv_decrypt_audio( |
| uint32_t session_id, |
| struct drm_wv_audio_data *audio_info); |
| |
| |
| /* |
| * @brief Decrypts Widevine video ciphertext data into the IMR decryption buffer |
| * @param session_id DRM Session ID number |
| * @param video_info Pointer to the Widevine video data |
| */ |
| uint32_t drm_wv_decrypt_video( |
| uint32_t session_id, |
| struct drm_wv_video_cipher *video_info); |
| |
| |
| uint32_t drm_wv_return_naluheaders( |
| uint32_t session_id, |
| struct drm_wv_nalu_headers *nalu_info); |
| |
| uint32_t drm_wv_keybox_provision( |
| struct wv_keybox *buf); |
| |
| |
| /* |
| * @brief Encrypts a Widevine keybox with a device specific key. |
| * |
| * @param[in] p_keybox Pointer to a Widevine keybox. May be NULL if |
| * keybox_length is zero. |
| * |
| * @param[in] keybox_length Length of the Widevine keybox in bytes. If zero then |
| * only the size of an encrypted Widevine keybox is returned. |
| * |
| * @param[out] p_wrapped_keybox Pointer to a buffer for the returned encrypted |
| * Widevine keybox. May be NULL if keybox_length is zero. |
| * |
| * @param[out] p_wrapped_keybox_length Length of the encrypted Widevine keybox |
| * in bytes. |
| * |
| * @param[in] p_transport_key Pointer to a transport key. May be NULL if |
| * transport_key_length is zero. |
| * |
| * @param[in] transport_key_length Length of the transport key in bytes. |
| * |
| * A Widevine keybox encrypted with the transport key is not supported. |
| */ |
| uint32_t drm_wv_wrap_keybox(const uint8_t * const p_keybox, |
| const uint32_t keybox_length, |
| uint8_t * const p_wrapped_keybox, |
| uint32_t * const p_wrapped_keybox_length, |
| const uint8_t * const p_transport_key, |
| const uint32_t transport_key_length); |
| |
| |
| /* |
| * @brief Decrypts a wrapped Widevine keybox and installs it into the device. |
| * |
| * @param[in] p_keybox Pointer to a wrapped Widevine keybox. |
| * |
| * @param[in] keybox_length Length of the Widevine keybox in bytes. |
| */ |
| uint32_t drm_wv_install_keybox(const uint8_t * const p_keybox, |
| const uint32_t keybox_length); |
| |
| |
| /*! |
| * @brief Erases installed Widevine keybox from secure storage |
| */ |
| uint32_t drm_wv_remove_keybox(void); |
| |
| /** |
| * @brief Temporarily loads test keybox. |
| */ |
| uint32_t drm_wv_load_test_keybox(void); |
| |
| #endif //__WV_DRM_API_H__ |