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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.conscrypt;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* Provides an interface to OpenSSL's BIO system directly from a Java
* InputStream. It allows an OpenSSL API to read directly from something more
* flexible interface than a byte array.
*/
public class OpenSSLBIOInputStream extends FilterInputStream {
private long ctx;
public OpenSSLBIOInputStream(InputStream is) {
super(is);
ctx = NativeCrypto.create_BIO_InputStream(this);
}
public long getBioContext() {
return ctx;
}
/**
* Similar to a {@code readLine} method, but matches what OpenSSL expects
* from a {@code BIO_gets} method.
*/
public int gets(byte[] buffer) throws IOException {
if (buffer == null || buffer.length == 0) {
return 0;
}
int offset = 0;
int inputByte = 0;
while (offset < buffer.length) {
inputByte = read();
if (inputByte == -1) {
// EOF
break;
}
if (inputByte == '\n') {
if (offset == 0) {
// If we haven't read anything yet, ignore CRLF.
continue;
} else {
break;
}
}
buffer[offset++] = (byte) inputByte;
}
return offset;
}
}
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