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Moved stream crypto to crypto component.

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This commit is contained in:
akwizgran
2014-12-29 19:55:05 +00:00
parent 02a485ace0
commit f316d64afa
33 changed files with 504 additions and 354 deletions
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44
briar-tests/src/org/briarproject/transport/TestStreamDecrypter.java Normal file
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@@ -0,0 +1,44 @@
package org.briarproject.transport;
import static org.briarproject.api.transport.TransportConstants.HEADER_LENGTH;
import static org.briarproject.api.transport.TransportConstants.MAC_LENGTH;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import org.briarproject.api.FormatException;
import org.briarproject.api.crypto.StreamDecrypter;
import org.briarproject.util.ByteUtils;
class TestStreamDecrypter implements StreamDecrypter {
private final InputStream in;
private final byte[] frame;
TestStreamDecrypter(InputStream in, int frameLength) {
this.in = in;
frame = new byte[frameLength];
}
public int readFrame(byte[] payload) throws IOException {
int offset = 0;
while(offset < HEADER_LENGTH) {
int read = in.read(frame, offset, HEADER_LENGTH - offset);
if(read == -1) throw new EOFException();
offset += read;
}
boolean finalFrame = (frame[0] & 0x80) == 0x80;
int payloadLength = ByteUtils.readUint16(frame, 0) & 0x7FFF;
while(offset < frame.length) {
int read = in.read(frame, offset, frame.length - offset);
if(read == -1) break;
offset += read;
}
if(!finalFrame && offset < frame.length) throw new EOFException();
if(offset < HEADER_LENGTH + payloadLength + MAC_LENGTH)
throw new FormatException();
System.arraycopy(frame, HEADER_LENGTH, payload, 0, payloadLength);
return payloadLength;
}
}