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/*
* Copyright 2015, Mozilla Foundation and contributors
*
* 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.
*/
#include "ClearKeyStorage.h"
#include <assert.h>
// This include is required in order for content_decryption_module to work
// on Unix systems.
#include <stddef.h>
#include <vector>
#include "content_decryption_module.h"
#include "ArrayUtils.h"
#include "ClearKeyUtils.h"
using namespace cdm;
using std::function;
using std::string;
using std::vector;
class WriteRecordClient : public FileIOClient {
public:
/*
* This function will take the memory ownership of the parameters and
* delete them when done.
*/
static void Write(Host_10* aHost, string& aRecordName,
const vector<uint8_t>& aData, function<void()>&& aOnSuccess,
function<void()>&& aOnFailure) {
WriteRecordClient* client = new WriteRecordClient(
aData, std::move(aOnSuccess), std::move(aOnFailure));
client->Do(aRecordName, aHost);
}
void OnOpenComplete(Status aStatus) override {
// If we hit an error, fail.
if (aStatus != Status::kSuccess) {
Done(aStatus);
} else if (mFileIO) { // Otherwise, write our data to the file.
mFileIO->Write(&mData[0], mData.size());
}
}
void OnReadComplete(Status aStatus, const uint8_t* aData,
uint32_t aDataSize) override {
// This function should never be called, we only ever write data with this
// client.
assert(false);
}
void OnWriteComplete(Status aStatus) override { Done(aStatus); }
private:
explicit WriteRecordClient(const vector<uint8_t>& aData,
function<void()>&& aOnSuccess,
function<void()>&& aOnFailure)
: mFileIO(nullptr),
mOnSuccess(std::move(aOnSuccess)),
mOnFailure(std::move(aOnFailure)),
mData(aData) {}
void Do(const string& aName, Host_10* aHost) {
// Initialize the FileIO.
mFileIO = aHost->CreateFileIO(this);
mFileIO->Open(aName.c_str(), aName.size());
}
void Done(cdm::FileIOClient::Status aStatus) {
// Note: Call Close() before running continuation, in case the
// continuation tries to open the same record; if we call Close()
// after running the continuation, the Close() call will arrive
// just after the Open() call succeeds, immediately closing the
// record we just opened.
if (mFileIO) {
mFileIO->Close();
}
if (IO_SUCCEEDED(aStatus)) {
mOnSuccess();
} else {
mOnFailure();
}
delete this;
}
FileIO* mFileIO = nullptr;
function<void()> mOnSuccess;
function<void()> mOnFailure;
const vector<uint8_t> mData;
};
void WriteData(Host_10* aHost, string& aRecordName,
const vector<uint8_t>& aData, function<void()>&& aOnSuccess,
function<void()>&& aOnFailure) {
WriteRecordClient::Write(aHost, aRecordName, aData, std::move(aOnSuccess),
std::move(aOnFailure));
}
class ReadRecordClient : public FileIOClient {
public:
/*
* This function will take the memory ownership of the parameters and
* delete them when done.
*/
static void Read(Host_10* aHost, string& aRecordName,
function<void(const uint8_t*, uint32_t)>&& aOnSuccess,
function<void()>&& aOnFailure) {
(new ReadRecordClient(std::move(aOnSuccess), std::move(aOnFailure)))
->Do(aRecordName, aHost);
}
void OnOpenComplete(Status aStatus) override {
auto err = aStatus;
if (aStatus != Status::kSuccess) {
Done(err, nullptr, 0);
} else {
mFileIO->Read();
}
}
void OnReadComplete(Status aStatus, const uint8_t* aData,
uint32_t aDataSize) override {
Done(aStatus, aData, aDataSize);
}
void OnWriteComplete(Status aStatus) override {
// We should never reach here, this client only ever reads data.
assert(false);
}
private:
explicit ReadRecordClient(
function<void(const uint8_t*, uint32_t)>&& aOnSuccess,
function<void()>&& aOnFailure)
: mFileIO(nullptr),
mOnSuccess(std::move(aOnSuccess)),
mOnFailure(std::move(aOnFailure)) {}
void Do(const string& aName, Host_10* aHost) {
mFileIO = aHost->CreateFileIO(this);
mFileIO->Open(aName.c_str(), aName.size());
}
void Done(cdm::FileIOClient::Status aStatus, const uint8_t* aData,
uint32_t aDataSize) {
// Note: Call Close() before running continuation, in case the
// continuation tries to open the same record; if we call Close()
// after running the continuation, the Close() call will arrive
// just after the Open() call succeeds, immediately closing the
// record we just opened.
if (mFileIO) {
mFileIO->Close();
}
if (IO_SUCCEEDED(aStatus)) {
mOnSuccess(aData, aDataSize);
} else {
mOnFailure();
}
delete this;
}
FileIO* mFileIO = nullptr;
function<void(const uint8_t*, uint32_t)> mOnSuccess;
function<void()> mOnFailure;
};
void ReadData(Host_10* aHost, string& aRecordName,
function<void(const uint8_t*, uint32_t)>&& aOnSuccess,
function<void()>&& aOnFailure) {
ReadRecordClient::Read(aHost, aRecordName, std::move(aOnSuccess),
std::move(aOnFailure));
}
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