Rocket.Chat/packages/rocketchat-e2e/server/models/Users.js

import { RocketChat } from 'meteor/rocketchat:lib';

RocketChat.models.Users.setE2EPublicAndPivateKeysByUserId = function(userId, { public_key, private_key }) {
	this.update({ _id: userId }, {
		$set: {
			'e2e.public_key': public_key,
			'e2e.private_key': private_key,
		},
	});
};

RocketChat.models.Users.fetchKeysByUserId = function(userId) {
	const user = this.findOne({ _id: userId }, { fields: { e2e: 1 } });

	if (!user || !user.e2e || !user.e2e.public_key) {
		return {};
	}

	return {
		public_key: user.e2e.public_key,
		private_key: user.e2e.private_key,
	};
};

RocketChat.models.Users.findByIdsWithPublicE2EKey = function(ids, options) {
	const query = {
		_id: {
			$in: ids,
		},
		'e2e.public_key': {
			$exists: 1,
		},
	};

	return this.find(query, options);
};