1a8aa0dd05
Builds libwvmdrmengine.so, which is loaded by the new MediaDrm APIs to support playback of Widevine/CENC protected content. Change-Id: I6f57dd37083dfd96c402cb9dd137c7d74edc8f1c
110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
/*******************************************************************************
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*
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* Copyright 2013 Google Inc. All Rights Reserved.
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*
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* mock implementation of OEMCrypto APIs
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*
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******************************************************************************/
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#include "l3crypto_keybox_mock.h"
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#include <arpa/inet.h> // TODO(fredgc): Add ntoh to wv_cdm_utilities.h
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#include <string>
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#include <cstring>
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#include <sys/types.h>
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#include "log.h"
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#include "wvcrc32.h"
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#include "wv_keybox.h"
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namespace wvoec_obfs {
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const WidevineKeybox kDefaultKeybox = {
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// Sample keybox used for test vectors
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{
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// deviceID
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0x54, 0x65, 0x73, 0x74, 0x4b, 0x65, 0x79, 0x30, // TestKey01
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0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // ........
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // ........
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // ........
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}, {
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// key
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0xfb, 0xda, 0x04, 0x89, 0xa1, 0x58, 0x16, 0x0e,
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0xa4, 0x02, 0xe9, 0x29, 0xe3, 0xb6, 0x8f, 0x04,
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}, {
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// data
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0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x10, 0x19,
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0x07, 0xd9, 0xff, 0xde, 0x13, 0xaa, 0x95, 0xc1,
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0x22, 0x67, 0x80, 0x53, 0x36, 0x21, 0x36, 0xbd,
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0xf8, 0x40, 0x8f, 0x82, 0x76, 0xe4, 0xc2, 0xd8,
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0x7e, 0xc5, 0x2b, 0x61, 0xaa, 0x1b, 0x9f, 0x64,
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0x6e, 0x58, 0x73, 0x49, 0x30, 0xac, 0xeb, 0xe8,
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0x99, 0xb3, 0xe4, 0x64, 0x18, 0x9a, 0x14, 0xa8,
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0x72, 0x02, 0xfb, 0x02, 0x57, 0x4e, 0x70, 0x64,
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0x0b, 0xd2, 0x2e, 0xf4, 0x4b, 0x2d, 0x7e, 0x39,
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}, {
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// magic
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0x6b, 0x62, 0x6f, 0x78,
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}, {
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// Crc
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0x0a, 0x7a, 0x2c, 0x35,
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}
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};
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WvKeybox::WvKeybox() : valid_(false) {
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Prepare();
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}
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bool WvKeybox::Prepare() {
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InstallKeybox(reinterpret_cast<const uint8_t*>(&kDefaultKeybox),
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sizeof(kDefaultKeybox));
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valid_ = true;
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return valid_;
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}
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KeyboxError WvKeybox::Validate() {
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if (!valid_) {
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LOGE("[KEYBOX NOT LOADED]");
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return OTHER_ERROR;
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}
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if (strncmp(reinterpret_cast<char*>(magic_), "kbox", 4) != 0) {
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LOGE("[KEYBOX HAS BAD MAGIC]");
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return BAD_MAGIC;
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}
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uint32_t crc_computed;
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uint32_t* crc_stored = (uint32_t*)crc_;
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WidevineKeybox keybox;
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memset(&keybox, 0, sizeof(keybox));
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memcpy(keybox.device_id_, &device_id_[0], device_id_.size());
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memcpy(keybox.device_key_, &device_key_.value()[0], sizeof(keybox.device_key_));
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memcpy(keybox.data_, key_data_, sizeof(keybox.data_));
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memcpy(keybox.magic_, magic_, sizeof(keybox.magic_));
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crc_computed = ntohl(wvcrc32(reinterpret_cast<uint8_t*>(&keybox),
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sizeof(keybox) - 4)); // Don't include last 4 bytes.
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if (crc_computed != *crc_stored) {
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LOGE("[KEYBOX CRC problem: computed = %08x, stored = %08x]\n",
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crc_computed, *crc_stored);
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return BAD_CRC;
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}
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return NO_ERROR;
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}
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bool WvKeybox::InstallKeybox(const uint8_t* buffer, size_t keyBoxLength) {
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if (keyBoxLength != 128) {
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return false;
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}
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const WidevineKeybox* keybox
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= reinterpret_cast<const WidevineKeybox*>(buffer);
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device_id_.assign(keybox->device_id_,
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keybox->device_id_ + sizeof(keybox->device_id_));
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device_key_.setValue(reinterpret_cast<const char*>(keybox->device_key_),
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sizeof(keybox->device_key_));
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device_key_.setType(KEYTYPE_DEVICE);
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memcpy(key_data_, keybox->data_, sizeof(keybox->data_));
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memcpy(magic_, keybox->magic_, sizeof(keybox->magic_));
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memcpy(crc_, keybox->crc_, sizeof(keybox->crc_));
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return true;
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}
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}; // namespace wvoec_eng
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