[WIP] Adding functionality for End-to-End encrypted conversations

[mrinaldhar]

@RocketChat/core

Creating new package "RocketChat-e2e", that enables end-to-end encrypted chat conversations in Rocket.Chat, as part of Google Summer of Code 2017.

Project will add functionality for encrypted direct messaging, encrypted group conversations and encrypted file uploads.

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Objectives completed at end of GSoC programme:

• E2E Encryption support for Direct messaging
• E2E Encryption support for Private groups
• E2E Encryption support for uploaded files
• Offline encrypted chats

[CLAassistant]

All committers have signed the CLA.

[jfchevrette]

@mrinaldhar This is awesome! May I ask is this only 1-on-1 private chats or is this also going to encrypt conversations in rooms?

[mrinaldhar]

@jfchevrette I'll first be adding support for 1-on-1 conversations, but plans include supporting encrypted group chats as well.

[cyclops24]

@mrinaldhar It's very awesome feature. Is it complete or still needs more work?

[geekgonecrazy]

Fixes: #7507

[geekgonecrazy]

Note for any that come across. This is merged into a branch, not to develop. Still WIP