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import JSEncrypt from './js-encrypt.js';
// @ts-ignore
const AES = require('crypto-js/aes');
// @ts-ignore
const ENC_UTF8 = require('crypto-js/enc-utf8');
// @ts-ignore
const ENC_BASE64 = require('crypto-js/enc-base64');
// @ts-ignore
const CTR_MODE = require('crypto-js/mode-ctr');
// @ts-ignore
const PAD_NOPADDING = require('crypto-js/pad-nopadding');
export interface RSACipherOb {
cipherText: string;
iv: string;
secretKey: string;
}
function generateRandomBytes (byteLength: number): string {
let result = '';
while (result.length < byteLength) {
result += Math.random()
.toString(36)
.substr(2, 1);
}
return result;
}
function aesEncrypt (
plaintext: string,
keyString: string,
ivString: string,
mode: any,
padding: any
): string {
const key = ENC_UTF8.parse(keyString);
const iv = ENC_UTF8.parse(ivString);
const cipherResult = AES.encrypt(plaintext, key, {
mode: mode,
padding: padding,
iv: iv
});
const ciphertext = cipherResult.ciphertext;
const ciphertextBase64 = ciphertext.toString(ENC_BASE64);
return ciphertextBase64;
}
function rsaEncrypt (plaintext: string, publicKey: string): string {
const en = new JSEncrypt();
en.setPublicKey(publicKey);
const cipher = en.encrypt(plaintext);
return cipher;
}
/**
* AES-128-CTR
*/
function ctrEncrypt (plaintext: string, keyString: string, ivString: string): string {
return aesEncrypt(plaintext, keyString, ivString, CTR_MODE, PAD_NOPADDING);
}
export function encryptByRSA (
plaintext: string,
publicKey: string
): RSACipherOb {
const iv = generateRandomBytes(16);
const aesKey = generateRandomBytes(16);
const cipherText = ctrEncrypt(plaintext, aesKey, iv);
const secretKey = rsaEncrypt(aesKey, publicKey);
return {
cipherText,
iv,
secretKey
};
}
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