AesDecrypt.kt

fun String.aesDecrypt(transformation: String = "AES/CBC/PKCS7PADDING", key: String, iv: String) =
    also {
        Security.addProvider(BouncyCastleProvider())
    }.let {
        Cipher.getInstance(transformation)
    }.also {
        it.init(
            Cipher.DECRYPT_MODE,
            SecretKeySpec(key.toByteArray(StandardCharsets.UTF_8), "AES"),
            IvParameterSpec(iv.toByteArray(StandardCharsets.UTF_8))
        )
    }.let {
        String(it.doFinal(this.hexString2ByteArray()))
    }