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/*
*
* Copyright (c) 2020-2021 Project CHIP Authors
* All rights reserved.
*
* 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.
*/
/**
* @file
* Platform-specific implementation of KVS for android.
*/
#include <platform/KeyValueStoreManager.h>
#include <algorithm>
#include <string.h>
#include <lib/support/Base64.h>
#include <lib/support/CHIPJNIError.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/JniTypeWrappers.h>
#include <lib/support/logging/CHIPLogging.h>
namespace chip {
namespace DeviceLayer {
namespace PersistedStorage {
namespace {
constexpr size_t kMaxKvsValueBytes = 4096;
constexpr size_t kMaxKvsValueEncodedChars = BASE64_ENCODED_LEN(kMaxKvsValueBytes) + 1;
} // namespace
KeyValueStoreManagerImpl KeyValueStoreManagerImpl::sInstance;
void KeyValueStoreManagerImpl::InitializeWithObject(jobject manager)
{
JNIEnv * env = JniReferences::GetInstance().GetEnvForCurrentThread();
VerifyOrReturn(env != nullptr, ChipLogError(DeviceLayer, "Failed to GetEnvForCurrentThread for KeyValueStoreManagerImpl"));
mKeyValueStoreManagerObject = env->NewGlobalRef(manager);
VerifyOrReturn(mKeyValueStoreManagerObject != nullptr,
ChipLogError(DeviceLayer, "Failed to NewGlobalRef KeyValueStoreManager"));
jclass KeyValueStoreManagerClass = env->GetObjectClass(manager);
VerifyOrReturn(KeyValueStoreManagerClass != nullptr,
ChipLogError(DeviceLayer, "Failed to get KeyValueStoreManager Java class"));
mGetMethod = env->GetMethodID(KeyValueStoreManagerClass, "get", "(Ljava/lang/String;)Ljava/lang/String;");
if (mGetMethod == nullptr)
{
ChipLogError(DeviceLayer, "Failed to access KeyValueStoreManager 'get' method");
env->ExceptionClear();
}
mSetMethod = env->GetMethodID(KeyValueStoreManagerClass, "set", "(Ljava/lang/String;Ljava/lang/String;)V");
if (mSetMethod == nullptr)
{
ChipLogError(DeviceLayer, "Failed to access KeyValueStoreManager 'set' method");
env->ExceptionClear();
}
mDeleteMethod = env->GetMethodID(KeyValueStoreManagerClass, "delete", "(Ljava/lang/String;)V");
if (mDeleteMethod == nullptr)
{
ChipLogError(DeviceLayer, "Failed to access KeyValueStoreManager 'delete' method");
env->ExceptionClear();
}
}
CHIP_ERROR KeyValueStoreManagerImpl::_Get(const char * key, void * value, size_t value_size, size_t * read_bytes_size,
size_t offset_bytes)
{
CHIP_ERROR err = CHIP_NO_ERROR;
ReturnErrorCodeIf(mKeyValueStoreManagerObject == nullptr, CHIP_ERROR_INCORRECT_STATE);
ReturnErrorCodeIf(mGetMethod == nullptr, CHIP_ERROR_INCORRECT_STATE);
JNIEnv * env = JniReferences::GetInstance().GetEnvForCurrentThread();
ReturnErrorCodeIf(env == nullptr, CHIP_JNI_ERROR_NO_ENV);
chip::UtfString javaKey(env, key);
jobject javaValue = env->CallObjectMethod(mKeyValueStoreManagerObject, mGetMethod, javaKey.jniValue());
if (env->ExceptionCheck())
{
ChipLogError(DeviceLayer, "Java exception in KeyValueStoreManager::Get");
env->ExceptionDescribe();
env->ExceptionClear();
return CHIP_JNI_ERROR_EXCEPTION_THROWN;
}
if (javaValue == nullptr)
{
return CHIP_ERROR_PERSISTED_STORAGE_VALUE_NOT_FOUND;
}
chip::JniUtfString utfValue(env, (jstring) javaValue);
const size_t utfValueLen = strlen(utfValue.c_str());
if (utfValueLen > kMaxKvsValueEncodedChars)
{
ChipLogError(DeviceLayer, "Unexpected large value received from KeyValueStoreManager");
return CHIP_ERROR_NO_MEMORY;
}
std::unique_ptr<uint8_t[]> buffer(new uint8_t[BASE64_MAX_DECODED_LEN(utfValueLen)]);
uint16_t decodedLength = chip::Base64Decode(utfValue.c_str(), utfValueLen, buffer.get());
if (decodedLength == UINT16_MAX)
{
ChipLogError(DeviceLayer, "KeyValueStoreManager base64 decoding failed");
return CHIP_ERROR_INTEGRITY_CHECK_FAILED;
}
ReturnErrorCodeIf(offset_bytes != 0 && offset_bytes >= decodedLength, CHIP_ERROR_INVALID_ARGUMENT);
size_t read_size = std::min<size_t>(value_size, decodedLength - offset_bytes);
if (value_size + offset_bytes < decodedLength)
{
err = CHIP_ERROR_BUFFER_TOO_SMALL;
}
if (read_bytes_size != nullptr)
{
*read_bytes_size = read_size;
}
if (value != nullptr)
{
memcpy(value, buffer.get() + offset_bytes, read_size);
}
return err;
}
CHIP_ERROR KeyValueStoreManagerImpl::_Put(const char * key, const void * value, size_t value_size)
{
ReturnErrorCodeIf(mKeyValueStoreManagerObject == nullptr, CHIP_ERROR_INCORRECT_STATE);
ReturnErrorCodeIf(mSetMethod == nullptr, CHIP_ERROR_INCORRECT_STATE);
ReturnErrorCodeIf(value_size > kMaxKvsValueBytes, CHIP_ERROR_INVALID_ARGUMENT);
JNIEnv * env = JniReferences::GetInstance().GetEnvForCurrentThread();
ReturnErrorCodeIf(env == nullptr, CHIP_ERROR_INTERNAL);
std::unique_ptr<char[]> buffer(new char[BASE64_ENCODED_LEN(value_size) + 1]);
size_t length = chip::Base64Encode(static_cast<const uint8_t *>(value), value_size, buffer.get());
buffer.get()[length] = 0;
UtfString utfKey(env, key);
UtfString utfBase64Value(env, buffer.get());
env->CallVoidMethod(mKeyValueStoreManagerObject, mSetMethod, utfKey.jniValue(), utfBase64Value.jniValue());
if (env->ExceptionCheck())
{
ChipLogError(DeviceLayer, "Java exception in KeyValueStoreManager::Put");
env->ExceptionDescribe();
env->ExceptionClear();
return CHIP_JNI_ERROR_EXCEPTION_THROWN;
}
return CHIP_NO_ERROR;
}
CHIP_ERROR KeyValueStoreManagerImpl::_Delete(const char * key)
{
ReturnErrorCodeIf(mKeyValueStoreManagerObject == nullptr, CHIP_ERROR_INCORRECT_STATE);
ReturnErrorCodeIf(mDeleteMethod == nullptr, CHIP_ERROR_INCORRECT_STATE);
JNIEnv * env = JniReferences::GetInstance().GetEnvForCurrentThread();
ReturnErrorCodeIf(env == nullptr, CHIP_ERROR_INTERNAL);
UtfString javaKey(env, key);
env->CallVoidMethod(mKeyValueStoreManagerObject, mDeleteMethod, javaKey.jniValue());
if (env->ExceptionCheck())
{
ChipLogError(DeviceLayer, "Java exception in KeyValueStoreManager::Delete");
env->ExceptionDescribe();
env->ExceptionClear();
return CHIP_JNI_ERROR_EXCEPTION_THROWN;
}
return CHIP_NO_ERROR;
}
} // namespace PersistedStorage
} // namespace DeviceLayer
} // namespace chip