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TextSecure for iOS

Currently in early development stage. Please see Contributing for details how best to contribute.

This is a working directory. TextSecure will be the instant messaging part of Signal

Temporary notice

The main Cocoapods repo got corrupted. Please follow these instructions for your next pod update

Building

  1. Clone the repo to a working directory

  2. CocoaPods is used to manage dependencies. Pods are setup easily and are distributed via a ruby gem. Follow the simple instructions on the website to setup. After setup, run the following command from the toplevel directory of TextSecureiOS to download the dependencies for TextSecure iOS:

pod install

If you are having build issues, first make sure your pods are up to date

pod update
pod install

occasionally, CocoaPods itself will need to be updated. Do this with

sudo gem update
  1. Open the TextSecureiOS.xcworkspace in Xcode. Note that for CocoaPods to work properly it is very important to always open the workspace and not the .xcodeproj file. Build and Run and you are ready to go!

  2. Debugging network calls. If you are contributing networked code, PonyDebugger is integrated in Debug mode of the application. Check out https://github.com/square/PonyDebugger#quick-start and easily debug network code from the iOS simulator

Compile Error when building for 64-bit architecture

Due to an issue in version 2.5.0 of the Google Protobuf Library the compiling fails when building the app for a 64-bit architecture (which is the case for the iPhone 5S)

See the Google-Issue for this: https://code.google.com/p/protobuf/issues/detail?id=575.

However the specified Workaround in the Google Issue solves the compile errors

Certificate Pinning

TextSecure uses certificate-pinning to avoid (wo)man-in-the-middle attacks. If you use your own server, here are the steps to generate the certificate file.

  1. Use OpenSSL to download the certificate (copy-paste the text between the BEGIN and END into a cert.pem file).
openssl s_client -showcerts -connect textsecure-service.whispersystems.org:443 </dev/null
  1. Use OpenSSL to convert this PEM certificate into a DER certificate.
openssl x509 -inform PEM -outform DER -in cert.pem -out cert.der
  1. Rename and move cert.der to TextSecureiOS/gcm.textsecure.whispersystems.org.cer

Documentation

Looking for documentation? Check out the wiki!

https://github.com/WhisperSystems/TextSecure/wiki

Interoperability

The iOS code will be tested to be interoperable with the TextSecure Android push-library branch

$ git clone https://github.com/WhisperSystems/TextSecure.git
$ git checkout push-library
$ gradle build
$ adb install -r build/apk/TextSecure-debug-unaligned.apk

You'll need gradle > 1.8 installed on your build machine, as well as the "Android Support Repository" and "Google Repository" installed from the Android SDK manager on your build machine.

Cryptography Notice

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.

License

Copyright 2013 Whisper Systems

Licensed under the GPLv3: http://www.gnu.org/licenses/gpl-3.0.html

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A secure text messaging application for iOS

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