Moved stream crypto to crypto component.

briar-api/src/org/briarproject/api/crypto/StreamDecrypter.java

@@ -0,0 +1,14 @@
+package org.briarproject.api.crypto;
+
+import java.io.IOException;
+
+public interface StreamDecrypter {
+
+	/**
+	 * Reads a frame, decrypts its payload into the given buffer and returns
+	 * the payload length, or -1 if no more frames can be read from the stream.
+	 * @throws java.io.IOException if an error occurs while reading the frame,
+	 * or if authenticated decryption fails.
+	 */
+	int readFrame(byte[] payload) throws IOException;
+}

briar-api/src/org/briarproject/api/crypto/StreamDecrypterFactory.java

@@ -0,0 +1,18 @@
+package org.briarproject.api.crypto;
+
+import java.io.InputStream;
+
+import org.briarproject.api.transport.StreamContext;
+
+public interface StreamDecrypterFactory {
+
+	/** Creates a {@link StreamDecrypter} for decrypting a transport stream. */
+	StreamDecrypter createStreamDecrypter(InputStream in, int maxFrameLength,
+			StreamContext ctx);
+
+	/**
+	 * Creates a {@link StreamDecrypter} for decrypting an invitation stream.
+	 */
+	StreamDecrypter createInvitationStreamDecrypter(InputStream in,
+			int maxFrameLength, byte[] secret, boolean alice);
+}

briar-api/src/org/briarproject/api/crypto/StreamEncrypter.java

@@ -0,0 +1,13 @@
+package org.briarproject.api.crypto;
+
+import java.io.IOException;
+
+public interface StreamEncrypter {
+
+	/** Encrypts the given frame and writes it to the stream. */
+	void writeFrame(byte[] payload, int payloadLength, boolean finalFrame)
+			throws IOException;
+
+	/** Flushes the stream. */
+	void flush() throws IOException;
+}

briar-api/src/org/briarproject/api/crypto/StreamEncrypterFactory.java

@@ -0,0 +1,18 @@
+package org.briarproject.api.crypto;
+
+import java.io.OutputStream;
+
+import org.briarproject.api.transport.StreamContext;
+
+public interface StreamEncrypterFactory {
+
+	/** Creates a {@link StreamEncrypter} for encrypting a transport stream. */
+	StreamEncrypter createStreamEncrypter(OutputStream out,
+			int maxFrameLength, StreamContext ctx);
+
+	/**
+	 * Creates a {@link StreamEncrypter} for encrypting an invitation stream.
+	 */
+	StreamEncrypter createInvitationStreamEncrypter(OutputStream out,
+			int maxFrameLength, byte[] secret, boolean alice);
+}