[TASK] Provide nacl-based Encryption

[ghost]

(draft)

related #1190 (Initial user-filed Issue)

Quick Summary

• Give dApps the ability to request from a user a naclPublicKey (derived from the private key kept within mm),
• key is used to encrypt data.
• dApp can request from user to decrypt data (mm asks user for confirmation) and send it back.

Team

This task is currently mainly executed by contributor @logvik (own use-case)

Test Setup

git clone https://github.com/logvik/metamask-extension mm-encrypt
cd mm-encrypt
yarn
yarn dist

https://github.com/logvik/metamask-extension/blob/develop/docs/add-to-chrome.md

cd ..
git clone https://github.com/logvik/test-dapp
cd test-dapp
npm i
npm start

Open http://localhost:9000

Status of Work

EIP level

• Add web3.eth.encrypt method for RPC & web3 ethereum/EIPs#130
• Add web3.eth.encrypt and web3.eth.decrypt functions to JSON-RPC ethereum/EIPs#1098

Packages

Completed work (merged and npm published)

• - Ecies eth-sig-util#29
• - Decrypt message eth-simple-keyring#32
• - Update index.js KeyringController#41
• - Is it updated on npm? eth-json-rpc-middleware#18
• - Update eth-simple-keyring to 3.5.0 eth-hd-keyring#21

MetaMask Core

• - Implementation for eth_decryptMessage #7247 => revise, review, e2e-test, Merge
• - provide the encryption_public_key API Call

MetaMask UI

• New decrypt message UI Design#149
• Decryption / Encryption use-case Design#154

Test dApp

Used to test and further refine the implementation, and to showcase the functionality/

• - Provide a Dev Dapp to test Encryption #7586
  • - https://github.com/logvik/test-dapp

Eth Ecosystem

• https://wiki.parity.io/JSONRPC-parity-module#parity_encryptmessage

[Gudahtt]

This was implemented in #7831