151 lines
4.0 KiB
C++
151 lines
4.0 KiB
C++
/*
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* Copyright (C) 2012 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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//#define LOG_NDEBUG 0
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#define LOG_TAG "wv_crypto_plugin"
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#include <utils/Log.h>
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#include "WVCryptoPlugin.h"
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#include <media/stagefright/foundation/ADebug.h>
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#include <media/stagefright/foundation/hexdump.h>
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#include <OEMCrypto_L1.h>
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#include <string.h>
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android::CryptoFactory *createCryptoFactory() {
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return new android::WVCryptoFactory;
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}
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namespace android {
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// static
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const uint8_t WVCryptoFactory::kUUIDWidevine[16] = {
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0xED,0xEF,0x8B,0xA9,0x79,0xD6,0x4A,0xCE,
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0xA3,0xC8,0x27,0xDC,0xD5,0x1D,0x21,0xED
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};
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WVCryptoPlugin::WVCryptoPlugin(const void *data, size_t size)
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: mInitCheck(NO_INIT) {
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// not using data at this time, require
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// size to be zero.
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if (size > 0) {
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mInitCheck = -EINVAL;
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} else {
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OEMCryptoResult res = OEMCrypto_Initialize();
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if (res != OEMCrypto_SUCCESS) {
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ALOGE("OEMCrypto_Initialize failed: %d", res);
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mInitCheck = -EINVAL;
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} else {
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mInitCheck = OK;
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}
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}
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}
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WVCryptoPlugin::~WVCryptoPlugin() {
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if (mInitCheck == OK) {
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OEMCryptoResult res = OEMCrypto_Terminate();
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if (res != OEMCrypto_SUCCESS) {
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ALOGW("OEMCrypto_Terminate failed: %d", res);
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}
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}
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}
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status_t WVCryptoPlugin::initCheck() const {
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return mInitCheck;
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}
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bool WVCryptoPlugin::requiresSecureDecoderComponent(const char *mime) const {
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return !strncasecmp(mime, "video/", 6);
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}
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status_t WVCryptoPlugin::decrypt(
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bool secure,
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const uint8_t key[16],
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const uint8_t iv[16],
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Mode mode,
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const void *srcPtr,
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const SubSample *subSamples, size_t numSubSamples,
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void *dstPtr,
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AString *errorDetailMsg) {
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Mutex::Autolock autoLock(mLock);
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//ALOGD("mode=%d, secure=%d, numSubSamples=%d", mode, secure, numSubSamples);
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CHECK(mode == kMode_Unencrypted || mode == kMode_AES_WV);
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size_t offset = 0;
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for (size_t i = 0; i < numSubSamples; ++i) {
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const SubSample &ss = subSamples[i];
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size_t srcSize;
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if (mode == kMode_Unencrypted) {
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srcSize = ss.mNumBytesOfClearData;
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CHECK_EQ(ss.mNumBytesOfEncryptedData, 0u);
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} else {
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CHECK_EQ(ss.mNumBytesOfClearData, 0u);
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srcSize = ss.mNumBytesOfEncryptedData;
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}
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//ALOGD("size[%d]=%d", i, srcSize);
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OEMCrypto_UINT32 dstLength = srcSize;
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OEMCryptoResult res;
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OEMCrypto_UINT8 _iv[16];
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const OEMCrypto_UINT8 *iv = NULL;
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if (mode != kMode_Unencrypted) {
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memset(_iv, 0, sizeof(_iv));
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iv = _iv;
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}
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if (secure) {
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//ALOGD("calling DecryptVideo, size=%d", srcSize);
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res = OEMCrypto_DecryptVideo(
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iv,
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(const OEMCrypto_UINT8 *)srcPtr + offset,
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srcSize,
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(OEMCrypto_UINT32)dstPtr,
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offset,
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&dstLength);
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} else {
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//ALOGD("calling DecryptAudio: size=%d", srcSize);
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res = OEMCrypto_DecryptAudio(
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iv,
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(const OEMCrypto_UINT8 *)srcPtr + offset,
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srcSize,
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(OEMCrypto_UINT8 *)dstPtr + offset,
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&dstLength);
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}
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if (res != OEMCrypto_SUCCESS) {
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ALOGE("decrypt result: %d", res);
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return -EINVAL;
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}
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offset += dstLength;
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}
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return OK;
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}
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} // namespace android
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