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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package org.conscrypt;
     18 
     19 import java.nio.ByteBuffer;
     20 import java.security.Key;
     21 import javax.crypto.Cipher;
     22 
     23 /**
     24  * Benchmark for comparing cipher encrypt performance.
     25  */
     26 public final class CipherEncryptBenchmark {
     27     public enum BufferType {
     28         ARRAY,
     29         HEAP_HEAP,
     30         HEAP_DIRECT,
     31         DIRECT_DIRECT,
     32         DIRECT_HEAP
     33     }
     34 
     35     /**
     36      * Provider for the benchmark configuration
     37      */
     38     interface Config {
     39         BufferType bufferType();
     40         CipherFactory cipherFactory();
     41         Transformation transformation();
     42     }
     43 
     44     private final EncryptStrategy encryptStrategy;
     45 
     46     CipherEncryptBenchmark(Config config) throws Exception {
     47         switch (config.bufferType()) {
     48             case ARRAY:
     49                 encryptStrategy = new ArrayStrategy(config);
     50                 break;
     51             default:
     52                 encryptStrategy = new ByteBufferStrategy(config);
     53                 break;
     54         }
     55     }
     56 
     57     int encrypt() throws Exception {
     58         return encryptStrategy.encrypt();
     59     }
     60 
     61     private static abstract class EncryptStrategy {
     62         private final Key key;
     63         final Cipher cipher;
     64         final int outputSize;
     65 
     66         EncryptStrategy(Config config) throws Exception {
     67             Transformation tx = config.transformation();
     68             key = tx.newEncryptKey();
     69             cipher = config.cipherFactory().newCipher(tx.toFormattedString());
     70             initCipher();
     71 
     72             int messageSize = messageSize(tx.toFormattedString());
     73             outputSize = cipher.getOutputSize(messageSize);
     74         }
     75 
     76         final void initCipher() throws Exception {
     77             cipher.init(Cipher.ENCRYPT_MODE, key);
     78         }
     79 
     80         final int messageSize(String transformation) throws Exception {
     81             Cipher conscryptCipher = Cipher.getInstance(transformation, TestUtils.getConscryptProvider());
     82             conscryptCipher.init(Cipher.ENCRYPT_MODE, key);
     83             return conscryptCipher.getBlockSize() > 0 ? conscryptCipher.getBlockSize() : 128;
     84         }
     85 
     86         final byte[] newMessage() {
     87             return TestUtils.newTextMessage(cipher.getBlockSize());
     88         }
     89 
     90         abstract int encrypt() throws Exception;
     91     }
     92 
     93     private static final class ArrayStrategy extends EncryptStrategy {
     94         private final byte[] plainBytes;
     95         private final byte[] cipherBytes;
     96 
     97         ArrayStrategy(Config config) throws Exception {
     98             super(config);
     99 
    100             plainBytes = newMessage();
    101             cipherBytes = new byte[outputSize];
    102         }
    103 
    104         @Override
    105         int encrypt() throws Exception {
    106             initCipher();
    107             return cipher.doFinal(plainBytes, 0, plainBytes.length, cipherBytes, 0);
    108         }
    109     }
    110 
    111     private static final class ByteBufferStrategy extends EncryptStrategy {
    112         private final ByteBuffer input;
    113         private final ByteBuffer output;
    114 
    115         ByteBufferStrategy(Config config) throws Exception {
    116             super(config);
    117 
    118             switch (config.bufferType()) {
    119                 case HEAP_HEAP:
    120                     input = ByteBuffer.wrap(newMessage());
    121                     output = ByteBuffer.allocate(outputSize);
    122                     break;
    123                 case HEAP_DIRECT:
    124                     input = ByteBuffer.wrap(newMessage());
    125                     output = ByteBuffer.allocateDirect(outputSize);
    126                     break;
    127                 case DIRECT_DIRECT:
    128                     input = toDirect(newMessage());
    129                     output = ByteBuffer.allocateDirect(outputSize);
    130                     break;
    131                 case DIRECT_HEAP:
    132                     input = toDirect(newMessage());
    133                     output = ByteBuffer.allocate(outputSize);
    134                     break;
    135                 default: {
    136                     throw new IllegalStateException(
    137                             "Unexpected buffertype: " + config.bufferType());
    138                 }
    139             }
    140         }
    141 
    142         @Override
    143         int encrypt() throws Exception {
    144             initCipher();
    145             input.position(0);
    146             output.clear();
    147             return cipher.doFinal(input, output);
    148         }
    149 
    150         private static ByteBuffer toDirect(byte[] data) {
    151             ByteBuffer buffer = ByteBuffer.allocateDirect(data.length);
    152             buffer.put(data);
    153             buffer.flip();
    154             return buffer;
    155         }
    156     }
    157 }
    158