@open-rights-exchange/orejs/dist/modules/crypto.js

Orejs is a Javascript helper library to provide simple high-level access to the ore-protocol. Orejs uses eosJS as a wrapper to the EOS blockchain.

"use strict";
var sjcl = require('sjcl');
// PRIVATE
// Encrypts the EOS private key with the derived key
function encryptWithKey(unencrypted, key) {
    var encrypted = JSON.parse(sjcl.encrypt(key, unencrypted, { mode: 'gcm' }));
    return JSON.stringify(encrypted);
}
// PUBLIC
// Derive the key used for encryption/decryption
// TODO: change default value for useOldSaltEncoding to false after migrating keys
function deriveKey(password, salt, useOldSaltEncoding) {
    if (useOldSaltEncoding === void 0) { useOldSaltEncoding = true; }
    var saltArray = salt;
    if (!useOldSaltEncoding) {
        // correct usage of this library is to convert the salt to a BitArray - otherwise it won't be decodable correcly using the expected approach
        saltArray = stringToBitArray(salt || '');
    }
    // NOTE Passing in at least an empty string for the salt, will prevent cached keys, which can lead to false positives in the test suite
    var key = sjcl.misc.cachedPbkdf2(password, { iter: 1000, salt: saltArray }).key;
    // new salt encoding expects the key object to be converted explicity to a string
    return (useOldSaltEncoding) ? key : bitArrayToString(key);
}
// Decrypts the encrypted EOS private key with the derived key
function decryptWithKey(encrypted, key) {
    try {
        var encryptedData = JSON.stringify(Object.assign(JSON.parse(encrypted), { mode: 'gcm' }));
        return sjcl.decrypt(key, encryptedData);
    }
    catch (err) {
        // console.error('Decryption Error:', err);
        return '';
    }
}
// Decrypts the encrypted EOS private key with wallet password, and salt
function decrypt(encrypted, password, salt) {
    // try decrypting with new Salt encoding approach
    var decrypted = decryptWithKey(encrypted, deriveKey(password, salt, false));
    if (decrypted === '') {
        // if decrypt fails, try using the old Salt encoding approach
        decrypted = decryptWithKey(encrypted, deriveKey(password, salt, true));
    }
    return decrypted;
}
// Encrypts the EOS private key with wallet password, and salt
// TODO: change default value for useOldSaltEncoding to false after migrating keys
function encrypt(unencrypted, password, salt, useOldSaltEncoding) {
    if (useOldSaltEncoding === void 0) { useOldSaltEncoding = true; }
    return encryptWithKey(unencrypted, deriveKey(password, salt, useOldSaltEncoding));
}
function stringToBitArray(value) {
    return sjcl.codec.base64.toBits(value);
}
function bitArrayToString(value) {
    return sjcl.codec.base64.fromBits(value);
}
module.exports = {
    decrypt: decrypt,
    decryptWithKey: decryptWithKey,
    deriveKey: deriveKey,
    encrypt: encrypt
};
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