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- /*
- * *********************************************************************************************************************
- *
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- * .:R888888I
- * .&888888I Copyright (c) 2016-2020. 博锐尚格科技股份有限公司
- * ~8888'
- * .!88~ All rights reserved.
- *
- * *********************************************************************************************************************
- */
- package com.persagy.service.utils.crypt
- import javax.crypto.Cipher
- import javax.crypto.KeyGenerator
- import javax.crypto.SecretKeyFactory
- import javax.crypto.spec.DESKeySpec
- import java.io.IOException
- import java.security.Key
- import java.security.NoSuchAlgorithmException
- import java.security.SecureRandom
- import java.util.*
- /**
- * DES安全编码组件
- *
- * @author Andy
- */
- abstract class SDESCoderUtil : SCoderUtil() {
- companion object {
- const val ALGORITHM = "DES"
- /**
- * 转换密钥
- *
- * @param key
- * @return
- * @throws Exception
- */
- @Throws(Exception::class)
- private fun toKey(key: ByteArray?): Key {
- val dks = DESKeySpec(key!!)
- val keyFactory = SecretKeyFactory.getInstance(ALGORITHM)
- return keyFactory.generateSecret(dks)
- }
- /**
- * 解密
- *
- * @param data
- * @param key
- * @return
- * @throws Exception
- */
- @Throws(Exception::class)
- fun decrypt(data: ByteArray, key: String): ByteArray {
- val k = toKey(Base64.getDecoder().decode(key))
- val cipher = Cipher.getInstance(ALGORITHM)
- cipher.init(Cipher.DECRYPT_MODE, k)
- return cipher.doFinal(data)
- } // Fun decrypt()
- /**
- * 加密
- *
- * @param data
- * @param key
- * @return
- * @throws Exception
- */
- @Throws(Exception::class)
- fun encrypt(data: ByteArray, key: String): ByteArray {
- val k = toKey(Base64.getDecoder().decode(key))
- val cipher = Cipher.getInstance(ALGORITHM)
- cipher.init(Cipher.ENCRYPT_MODE, k)
- return cipher.doFinal(data)
- } // Fun encrypt()
- /**
- * 生成密钥
- *
- * @param seed
- * @return
- * @throws IOException
- * @throws NoSuchAlgorithmException
- */
- @Throws(IOException::class, NoSuchAlgorithmException::class)
- @JvmOverloads
- fun initKey(seed: String? = null): String? {
- val secureRandom = if (seed != null) {
- SecureRandom(Base64.getDecoder().decode(seed))
- } else {
- SecureRandom()
- }
- val kg = KeyGenerator.getInstance(ALGORITHM)
- kg.init(secureRandom)
- val secretKey = kg.generateKey()
- return Base64.getEncoder().encodeToString(secretKey.encoded)
- } // Fun initKey()
- } // companion object
- } // Class SDESCoderUtil
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