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/*
* Copyright 2018 New Vector Ltd
*
* 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.
*/
package org.matrix.olm;
import android.util.Log;
import java.util.Arrays;
public class OlmPkDecryption {
private static final String LOG_TAG = "OlmPkDecryption";
/** Session Id returned by JNI.
* This value uniquely identifies the native session instance.
**/
private transient long mNativeId;
public OlmPkDecryption() throws OlmException {
try {
mNativeId = createNewPkDecryptionJni();
} catch (Exception e) {
throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_CREATION, e.getMessage());
}
}
private native long createNewPkDecryptionJni();
private native void releasePkDecryptionJni();
public void releaseDecryption() {
if (0 != mNativeId) {
releasePkDecryptionJni();
}
mNativeId = 0;
}
public boolean isReleased() {
return (0 == mNativeId);
}
public static native int privateKeyLength();
public String setPrivateKey(byte[] privateKey) throws OlmException {
try {
byte[] key = setPrivateKeyJni(privateKey);
return new String(key, "UTF-8");
} catch (Exception e) {
Log.e(LOG_TAG, "## setPrivateKey(): failed " + e.getMessage());
throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_SET_PRIVATE_KEY, e.getMessage());
}
}
private native byte[] setPrivateKeyJni(byte[] privateKey);
public String generateKey() throws OlmException {
try {
byte[] key = generateKeyJni();
return new String(key, "UTF-8");
} catch (Exception e) {
Log.e(LOG_TAG, "## setRecipientKey(): failed " + e.getMessage());
throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_GENERATE_KEY, e.getMessage());
}
}
private native byte[] generateKeyJni();
public byte[] privateKey() throws OlmException {
try {
return privateKeyJni();
} catch (Exception e) {
Log.e(LOG_TAG, "## privateKey(): failed " + e.getMessage());
throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_PRIVATE_KEY, e.getMessage());
}
}
private native byte[] privateKeyJni();
public String decrypt(OlmPkMessage aMessage) throws OlmException {
if (null == aMessage) {
return null;
}
byte[] plaintextBuffer = decryptJni(aMessage);
try {
String plaintext = new String(plaintextBuffer, "UTF-8");
return plaintext;
} catch (Exception e) {
Log.e(LOG_TAG, "## pkDecrypt(): failed " + e.getMessage());
throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_DECRYPT, e.getMessage());
} finally {
Arrays.fill(plaintextBuffer, (byte) 0);
}
}
private native byte[] decryptJni(OlmPkMessage aMessage);
}
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