1 files changed, 0 insertions, 158 deletions
diff --git a/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DHandshakeContext.java b/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DHandshakeContext.java
deleted file mode 100644
index 5fc1d7b..0000000
--- a/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DHandshakeContext.java
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2020 Google LLC
-//
-// 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
-//
-//     https://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 com.google.security.cryptauth.lib.securegcm;
-
-/**
- * Describes a cryptographic handshake with arbitrary number of round trips.  Some handshake
- * messages may also send a payload.
- *
- * <p>Generic usage for handshake Initiator:
- * {@code
- *   // Handshake Initiator
- *   D2DHandshakeContext handshake = <specific handshake>.forInitiator();
- *   while (!handshake.isHandshakeComplete()) {
- *     try {
- *       // Get the next handshake message to send
- *       byte[] initiatorMessage = handshake.getNextHandshakeMessage();
- *
- *       // Send the message out and get the response
- *       socket.send(initiatorMessage);
- *       byte[] responderMessage = socket.read();
- *
- *       // Handle the response and obtain the optional payload
- *       byte[] payload = handshake.parseHandshakeMessage(responderMessage);
- *
- *       // Handle the payload if one was sent
- *       if (payload.length > 0) {
- *         handlePayload(payload);
- *       }
- *     } catch (HandshakeException e) {
- *       // Handshake has failed, bail
- *       Log("Handshake failed!", e);
- *       return;
- *     }
- *   }
- *
- *   ConnectionContext connectionContext;
- *   try {
- *     // Upgrade handshake context to a full connection context
- *     connectionContext = handshake.toConnectionContext();
- *   } catch (HandshakeException e) {
- *     Log("Cannot convert handshake to connection context", e);
- *   }
- * }
- *
- * <p>Generic usage for handshake Responder:
- * {@code
- *   // Handshake Responder
- *   D2DHandshakeContext handshake = <specific handshake>.forResponder();
- *
- *   while (!handshake.isHandshakeComplete()) {
- *     try {
- *       // Get the message from the initiator
- *       byte[] initiatorMessage = socket.read();
- *
- *       // Handle the message and get the payload if it exists
- *       byte[] payload = handshake.parseHandshakeMessage(initiatorMessage);
- *
- *       // Handle the payload if one was sent
- *       if (payload.length > 0) {
- *         handlePayload(payload);
- *       }
- *
- *       // Make sure that wasn't the last message
- *       if (handshake.isHandshakeComplete()) {
- *         break;
- *       }
- *
- *       // Get next message to send and send it
- *       byte[] responderMessage = handshake.getNextHandshakeMessage();
- *       socket.send(responderMessage);
- *     } catch (HandshakeException e) {
- *       // Handshake has failed, bail
- *       Log("Handshake failed!", e);
- *       return;
- *     }
- *   }
- *
- *   ConnectionContext connectionContext;
- *   try {
- *     // Upgrade handshake context to a full connection context
- *     connectionContext = handshake.toConnectionContext();
- *   } catch (HandshakeException e) {
- *     Log("Cannot convert handshake to connection context", e);
- *   }
- * }
- */
-public interface D2DHandshakeContext {
-
-  /**
-   * Tells the caller whether the handshake has completed or not. If the handshake is complete, the
-   * caller may call {@link #toConnectionContext()} to obtain a connection context.
-   *
-   * @return true if the handshake is complete, false otherwise
-   */
-  boolean isHandshakeComplete();
-
-  /**
-   * Constructs the next message that should be sent in the handshake.
-   *
-   * @return the next message
-   * @throws HandshakeException if the handshake is over or if the next handshake message can't be
-   *     obtained (e.g., there is an internal error)
-   */
-  byte[] getNextHandshakeMessage() throws HandshakeException;
-
-  /**
-   * Tells the caller whether the next handshake message may carry a payload. If true, caller may
-   * call {@link #getNextHandshakeMessage(byte[])} instead of the regular
-   * {@link #getNextHandshakeMessage()}. If false, calling {@link #getNextHandshakeMessage(byte[])}
-   * will result in a {@link HandshakeException}.
-   *
-   * @return true if the next handshake message can carry a payload, false otherwise
-   */
-  boolean canSendPayloadInHandshakeMessage();
-
-  /**
-   * Constructs the next message that should be sent in the handshake along with a payload. Caller
-   * should verify that this method can be called by calling
-   * {@link #canSendPayloadInHandshakeMessage()}.
-   *
-   * @param payload the payload to include in the handshake message
-   * @return the next message
-   * @throws HandshakeException if the handshake is over or if the next handshake message can't be
-   *     obtained (e.g., there is an internal error) or if the payload may not be included in this
-   *     message
-   */
-  byte[] getNextHandshakeMessage(byte[] payload) throws HandshakeException;
-
-  /**
-   * Parses a handshake message and returns the included payload (if any).
-   *
-   * @param handshakeMessage message received in the handshake
-   * @return payload or empty byte[] if no payload was in the handshake message
-   * @throws HandshakeException if an error occurs in parsing the handshake message
-   */
-  byte[] parseHandshakeMessage(byte[] handshakeMessage) throws HandshakeException;
-
-  /**
-   * Creates a full {@link D2DConnectionContext}. May only be called if
-   * {@link #isHandshakeComplete()} returns true.
-   *
-   * @return a full {@link D2DConnectionContext}
-   * @throws HandshakeException if a connection context cannot be created
-   */
-  D2DConnectionContext toConnectionContext() throws HandshakeException;
-}