A Java library for communicating via Signal.

This library is an unofficial fork where we publish our changes to the official library (upstream). This fork allows using the Signal servers without Google Cloud Messaging (GCM) and provides provisioning, i.e. linking devices, and some bugfixes. Use it at your own risk. OpenWhisperSystems is not responsible for this fork.

Upstream development is now happening in the Signal-Android project: https://github.com/signalapp/Signal-Android/tree/master/libsignal/service The branch upstream is tracking the signal-service lib changes from the Signal-Android project.

The library is available on Maven Central.

This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See http://www.wassenaar.org/ for more information.

The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with asymmetric algorithms. The form and manner of this distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code.

Copyright 2013-2016 Open Whisper Systems

Licensed under the AGPLv3: https://www.gnu.org/licenses/agpl-3.0.html