mirror of https://github.com/moparisthebest/mail
124 lines
3.4 KiB
JavaScript
124 lines
3.4 KiB
JavaScript
(function() {
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'use strict';
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/**
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* Crypto batch library for processing large sets of data
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*/
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var CryptoBatch = function(aes, rsa, util, _) {
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/**
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* Encrypt a list of items using AES
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* @param list [Array] The list of items to encrypt
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*/
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this.encryptList = function(list) {
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list.forEach(function(i) {
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// stringify to JSON before encryption
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i.ciphertext = aes.encrypt(JSON.stringify(i.plaintext), i.key, i.iv);
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delete i.plaintext;
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});
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return list;
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};
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/**
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* Decrypt a list of items using AES
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* @param list [Array] The list of items to decrypt
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*/
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this.decryptList = function(list) {
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list.forEach(function(i) {
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// decrypt JSON and parse to object literal
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i.plaintext = JSON.parse(aes.decrypt(i.ciphertext, i.key, i.iv));
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delete i.ciphertext;
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});
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return list;
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};
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/**
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* Encrypt and sign a list of items using AES and RSA
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* @param list [Array] The list of items to encrypt
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* @param receiverPubkeys [Array] A list of public keys used to encrypt
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* @param senderPrivkey [Array] The sender's private key used to sign
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*/
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this.encryptListForUser = function(list, receiverPubkeys, senderPrivkey) {
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// encrypt list with aes
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var encryptedList = this.encryptList(list);
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// set sender private key
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rsa.init(null, senderPrivkey.privateKey);
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// encrypt keys for user
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encryptedList.forEach(function(i) {
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// fetch correct public key
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var pk = _.findWhere(receiverPubkeys, {
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_id: i.receiverPk
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});
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// set rsa public key used to encrypt
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rsa.init(pk.publicKey);
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// process new values
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i.encryptedKey = rsa.encrypt(i.key);
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i.signature = rsa.sign([i.iv, util.str2Base64(i.id), i.encryptedKey, i.ciphertext]);
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i.senderPk = senderPrivkey._id;
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// delete old ones
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delete i.key;
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delete i.receiverPk;
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});
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return encryptedList;
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};
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/**
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* Decrypt and verify a list of items using AES and RSA
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* @param list [Array] The list of items to decrypt
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* @param senderPubkeys [Array] A list of public keys used to verify
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* @param receiverPrivkey [Array] The receiver's private key used to decrypt
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*/
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this.decryptListForUser = function(encryptedList, senderPubkeys, receiverPrivkey) {
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var j, self = this;
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// set receiver private key
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rsa.init(null, receiverPrivkey.privateKey);
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// decrypt keys for user
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encryptedList.forEach(function(i) {
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// fetch correct public key
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var pk = _.findWhere(senderPubkeys, {
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_id: i.senderPk
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});
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// set rsa public key used to verify
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rsa.init(pk.publicKey);
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// verify signature
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if (!rsa.verify([i.iv, util.str2Base64(i.id), i.encryptedKey, i.ciphertext], i.signature)) {
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throw new Error('Verifying RSA signature failed!');
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}
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// process new values
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i.key = rsa.decrypt(i.encryptedKey);
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// delete old values
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delete i.signature;
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delete i.encryptedKey;
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delete i.senderPk;
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});
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// decrypt list
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var decryptedList = this.decryptList(encryptedList);
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// add plaintext to list
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for (j = 0; j < decryptedList.length; j++) {
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decryptedList[j] = decryptedList[j].plaintext;
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}
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return decryptedList;
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};
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};
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if (typeof module !== 'undefined' && module.exports) {
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module.exports = CryptoBatch;
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} else {
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var that = (typeof window !== 'undefined') ? window : self;
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that.cryptoLib = that.cryptoLib || {};
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that.cryptoLib.CryptoBatch = CryptoBatch;
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}
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})(); |