1 /* 2 * Copyright (C) 2014 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.io.ByteArrayOutputStream; 20 21 public final class OpenSSLBIOSink { 22 private final long ctx; 23 private final ByteArrayOutputStream buffer; 24 private int position; 25 26 public static OpenSSLBIOSink create() { 27 ByteArrayOutputStream buffer = new ByteArrayOutputStream(); 28 return new OpenSSLBIOSink(buffer); 29 } 30 31 private OpenSSLBIOSink(ByteArrayOutputStream buffer) { 32 ctx = NativeCrypto.create_BIO_OutputStream(buffer); 33 this.buffer = buffer; 34 } 35 36 public int available() { 37 return buffer.size() - position; 38 } 39 40 public void reset() { 41 buffer.reset(); 42 position = 0; 43 } 44 45 public long skip(long byteCount) { 46 int maxLength = Math.min(available(), (int) byteCount); 47 position += maxLength; 48 if (position == buffer.size()) { 49 reset(); 50 } 51 return maxLength; 52 } 53 54 public long getContext() { 55 return ctx; 56 } 57 58 public byte[] toByteArray() { 59 return buffer.toByteArray(); 60 } 61 62 public int position() { 63 return position; 64 } 65 66 @Override 67 protected void finalize() throws Throwable { 68 try { 69 NativeCrypto.BIO_free_all(ctx); 70 } finally { 71 super.finalize(); 72 } 73 } 74 } 75
