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