61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
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// Copyright (c) 2013 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "media/base/fixed_encryptor_source.h"
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#include "base/logging.h"
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#include "base/strings/string_number_conversions.h"
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#include "media/base/aes_encryptor.h"
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namespace {
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// The size of generated IV for this encryptor source.
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const uint8 kIvSize = 8;
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} // namespace
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namespace media {
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FixedEncryptorSource::FixedEncryptorSource(const std::string& key_id_hex,
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const std::string& key_hex,
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const std::string& pssh_hex,
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uint32 clear_milliseconds)
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: key_id_hex_(key_id_hex),
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key_hex_(key_hex),
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pssh_hex_(pssh_hex) {
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set_clear_milliseconds(clear_milliseconds);
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}
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FixedEncryptorSource::~FixedEncryptorSource() {}
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Status FixedEncryptorSource::Initialize() {
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std::vector<uint8> key_id;
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if (!base::HexStringToBytes(key_id_hex_, &key_id)) {
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LOG(ERROR) << "Cannot parse key_id_hex " << key_id_hex_;
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return Status(error::INVALID_ARGUMENT, "Cannot parse input key_id_hex.");
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}
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std::vector<uint8> key;
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if (!base::HexStringToBytes(key_hex_, &key)) {
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LOG(ERROR) << "Cannot parse key_hex " << key_hex_;
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return Status(error::INVALID_ARGUMENT, "Cannot parse input key_hex.");
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}
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std::vector<uint8> pssh;
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if (!base::HexStringToBytes(pssh_hex_, &pssh)) {
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LOG(ERROR) << "Cannot parse pssh_hex " << pssh_hex_;
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return Status(error::INVALID_ARGUMENT, "Cannot parse input pssh_hex.");
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}
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scoped_ptr<AesCtrEncryptor> encryptor(new AesCtrEncryptor());
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if (!encryptor->InitializeWithRandomIv(key, kIvSize))
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return Status(error::UNKNOWN, "Failed to initialize the encryptor.");
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set_encryptor(encryptor.Pass());
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set_key_id(key_id);
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set_key(key);
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set_pssh(pssh);
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return Status::OK;
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}
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} // namespace media
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