| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| |
| #ifndef _GUAC_SSH_AGENT_H |
| #define _GUAC_SSH_AGENT_H |
| |
| #include "config.h" |
| |
| #include "ssh_key.h" |
| |
| /** |
| * Packet type of an agent identity request. |
| */ |
| #define SSH2_AGENT_REQUEST_IDENTITIES 0x0B |
| |
| /** |
| * Packet type of an agent identity response. |
| */ |
| #define SSH2_AGENT_IDENTITIES_ANSWER 0x0C |
| |
| /** |
| * Packet type of an agent sign request. |
| */ |
| #define SSH2_AGENT_SIGN_REQUEST 0x0D |
| |
| /** |
| * Packet type of an agent sign response. |
| */ |
| #define SSH2_AGENT_SIGN_RESPONSE 0x0E |
| |
| /** |
| * The comment to associate with public keys when listed. |
| */ |
| #define SSH_AGENT_COMMENT "Guacamole SSH Agent" |
| |
| /** |
| * The packet sent by the SSH agent when an operation is not supported. |
| */ |
| #define UNSUPPORTED "\x00\x00\x00\x0C\x05Unsupported" |
| |
| /** |
| * Data representing an SSH auth agent. |
| */ |
| typedef struct ssh_auth_agent { |
| |
| /** |
| * The SSH channel being used for SSH agent protocol. |
| */ |
| LIBSSH2_CHANNEL* channel; |
| |
| /** |
| * The single private key to use for authentication. |
| */ |
| ssh_key* identity; |
| |
| /** |
| * Data read from the agent channel. |
| */ |
| char buffer[4096]; |
| |
| /** |
| * The number of bytes of data currently stored in the buffer. |
| */ |
| int buffer_length; |
| |
| } ssh_auth_agent; |
| |
| /** |
| * Handler for an agent sign request. |
| */ |
| void ssh_auth_agent_sign(ssh_auth_agent* auth_agent, |
| char* data, int data_length); |
| |
| /** |
| * Handler for an agent identity request. |
| */ |
| void ssh_auth_agent_list_identities(ssh_auth_agent* auth_agent); |
| |
| /** |
| * Generic handler for all packets received over the auth agent channel. |
| */ |
| void ssh_auth_agent_handle_packet(ssh_auth_agent* auth_agent, |
| uint8_t type, char* data, int data_length); |
| |
| /** |
| * Reads and handles a single packet from the SSH agent channel associated |
| * with the given ssh_auth_agent, returning the size of that packet, the size |
| * of the partial packet read, or a negative value if an error occurs. |
| */ |
| int ssh_auth_agent_read(ssh_auth_agent* auth_agent); |
| |
| /** |
| * Libssh2 callback, invoked when the auth agent channel is opened. |
| */ |
| void ssh_auth_agent_callback(LIBSSH2_SESSION *session, |
| LIBSSH2_CHANNEL *channel, void **abstract); |
| |
| #endif |
| |