code: public SshPublicKey[] list() throws SshException,
  			PublicKeySubsystemException {
  
  		try {
  
  			Packet msg = createPacket();
  			msg.writeString("list");
  
  			sendMessage(msg);
  
  			Vector<SshPublicKey> keys = new Vector<SshPublicKey>();
  
  			while (true) {
  				ByteArrayReader response = new ByteArrayReader(nextMessage());
  
  				try {
  					String type = response.readString();
  
  					if (type.equals("publickey")) {
  						@SuppressWarnings("unused")
  						String comment = response.readString();
  						String algorithm = response.readString();
  						keys.addElement(SshPublicKeyFileFactory
  								.decodeSSH2PublicKey(algorithm,
  										response.readBinaryString()));
  
  					} else if (type.equals("status")) {
  						int status = (int) response.readInt();
  						String desc = response.readString();
  
  						if (status != PublicKeySubsystemException.SUCCESS) {
  							throw new PublicKeySubsystemException(status, desc);
  						}
  						SshPublicKey[] array = new SshPublicKey[keys.size()];
  						keys.copyInto(array);
  
  						return array;
  
  					} else {
  						throw new SshException(
  								"The server sent an invalid response to a list command",
  								SshException.PROTOCOL_VIOLATION);
  					}
  				} finally {
  					try {
  						response.close();
  					} catch (IOException e) {
  					}
  				}
  			}
  		} catch (IOException ex) {
  			throw new SshException(ex);
  		}
  
  	}
docs: List all of the users acceptable keys.
  
  @return SshPublicKey[]