import * as CryptoJS from 'crypto-js';

export function encrypt(text: string, key: string, iv: string): string {
    const keyUtf8 = CryptoJS.enc.Utf8.parse(key);
    const ivUtf8 = CryptoJS.enc.Utf8.parse(iv);
    const encrypted = CryptoJS.AES.encrypt(text, keyUtf8, {
        iv: ivUtf8,
        mode: CryptoJS.mode.CTR,
        padding: CryptoJS.pad.NoPadding,
        format: CryptoJS.format.Hex
    });
    return encrypted.toString();
}

export function decrypt(ciphertext: string, key: string, iv: string): string {
    const keyUtf8 = CryptoJS.enc.Utf8.parse(key);
    const ivUtf8 = CryptoJS.enc.Utf8.parse(iv);
    const cypher = CryptoJS.enc.Hex.parse(ciphertext);
    const cipherParams = CryptoJS.lib.CipherParams.create({
        ciphertext: cypher,
    });
    const decrypted = CryptoJS.AES.decrypt(cipherParams, keyUtf8, {
        iv: ivUtf8,
        mode: CryptoJS.mode.CTR,
        padding: CryptoJS.pad.NoPadding,
    });
    return decrypted.toString(CryptoJS.enc.Utf8);
}