go-srp

Introduction

Golang implementation of the SRP protocol, used for authentication of ProtonMail users.

License

Copyright (c) 2019 Proton Technologies AG

Please see LICENSE file for the license.

Doc

• Technical blog post
• RFC 5054

.NET Wrapper

The windows folder contains the wrapper for .net.

Build for mobile apps

Setup Go Mobile and build/bind the source code:

Go Mobile repo: https://github.com/golang/mobile

Go Mobile wiki: https://github.com/golang/go/wiki/Mobile

1. Install Go: brew install go

2. Install Gomobile: go get -u golang.org/x/mobile/cmd/gomobile

3. Install Gobind: go install golang.org/x/mobile/cmd/gobind

4. Install Android SDK and NDK using Android Studio

5. Set env: export ANDROID_HOME="/AndroidSDK" (path to your SDK)

6. Init gomobile: gomobile init -ndk /AndroidSDK/ndk-bundle/ (path to your NDK)

7. Copy Go module dependencies to the vendor directory: go mod vendor

8. Build examples: gomobile build -target=android #or ios

   Bind examples: gomobile bind -target ios -o frameworks/name.framework gomobile bind -target android

   The bind will create framework for iOS and jar&aar files for Android (x86_64 and ARM).

Other notes

If you wish to use build.sh, you may need to modify the paths in it.

go mod vendor

./build.sh

Dependencies

github.com/ProtonMail/bcrypt (fork of github.com/jameskeane/bcrypt)

golang.org/x/mobile

github.com/ProtonMail/go-crypto

github.com/cronokirby/saferith