mirror of https://git.matrix.org/git/olm.git
84 lines
2.5 KiB
Java
84 lines
2.5 KiB
Java
/*
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* Copyright 2018 New Vector Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.matrix.olm;
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import android.util.Log;
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import java.util.Arrays;
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public class OlmPkDecryption {
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private static final String LOG_TAG = "OlmPkDecryption";
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/** Session Id returned by JNI.
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* This value uniquely identifies the native session instance.
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**/
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private transient long mNativeId;
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public OlmPkDecryption() throws OlmException {
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try {
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mNativeId = createNewPkDecryptionJni();
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} catch (Exception e) {
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throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_CREATION, e.getMessage());
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}
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}
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private native long createNewPkDecryptionJni();
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private native void releasePkDecryptionJni();
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public void releaseDecryption() {
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if (0 != mNativeId) {
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releasePkDecryptionJni();
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}
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mNativeId = 0;
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}
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public boolean isReleased() {
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return (0 == mNativeId);
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}
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public String generateKey() throws OlmException {
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try {
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byte[] key = generateKeyJni();
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return new String(key, "UTF-8");
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} catch (Exception e) {
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Log.e(LOG_TAG, "## setRecipientKey(): failed " + e.getMessage());
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throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_GENERATE_KEY, e.getMessage());
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}
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}
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private native byte[] generateKeyJni();
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public String decrypt(OlmPkMessage aMessage) throws OlmException {
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if (null == aMessage) {
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return null;
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}
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try {
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byte[] plaintextBuffer = decryptJni(aMessage);
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String plaintext = new String(plaintextBuffer, "UTF-8");
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Arrays.fill(plaintextBuffer, (byte) 0);
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return plaintext;
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} catch (Exception e) {
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Log.e(LOG_TAG, "## pkDecrypt(): failed " + e.getMessage());
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throw new OlmException(OlmException.EXCEPTION_CODE_PK_DECRYPTION_DECRYPT, e.getMessage());
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}
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}
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private native byte[] decryptJni(OlmPkMessage aMessage);
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}
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