SAESCoderUtil.kt 4.0 KB

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  1. /*
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  20. * .&888888I Copyright (c) 2016-2020. 博锐尚格科技股份有限公司
  21. * ~8888'
  22. * .!88~ All rights reserved.
  23. *
  24. * *********************************************************************************************************************
  25. */
  26. package com.persagy.service.utils.crypt
  27. import javax.crypto.Cipher
  28. import javax.crypto.KeyGenerator
  29. import javax.crypto.spec.SecretKeySpec
  30. import java.io.IOException
  31. import java.security.Key
  32. import java.security.NoSuchAlgorithmException
  33. import java.security.SecureRandom
  34. import java.util.*
  35. /**
  36. * AES 安全编码组件
  37. *
  38. * @author Andy
  39. */
  40. abstract class SAESCoderUtil : SCoderUtil() {
  41. companion object {
  42. const val ALGORITHM = "AES"
  43. /**
  44. * 转换密钥
  45. *
  46. * @param key 字节数组
  47. * @return key
  48. * @throws Exception
  49. */
  50. @Throws(Exception::class)
  51. private fun toKey(key: ByteArray): Key {
  52. return SecretKeySpec(key, ALGORITHM)
  53. }
  54. /**
  55. * 解密
  56. *
  57. * @param data
  58. * @param key
  59. * @return
  60. * @throws Exception
  61. */
  62. @Throws(Exception::class)
  63. fun decrypt(data: ByteArray, key: String): ByteArray {
  64. val k = toKey(Base64.getDecoder().decode(key))
  65. val cipher = Cipher.getInstance(ALGORITHM)
  66. cipher.init(Cipher.DECRYPT_MODE, k)
  67. return cipher.doFinal(data)
  68. } // Fun decrypt()
  69. /**
  70. * 加密
  71. *
  72. * @param data
  73. * @param key
  74. * @return
  75. * @throws Exception
  76. */
  77. @Throws(Exception::class)
  78. fun encrypt(data: ByteArray, key: String): ByteArray {
  79. val k = toKey(Base64.getDecoder().decode(key))
  80. val cipher = Cipher.getInstance(ALGORITHM)
  81. cipher.init(Cipher.ENCRYPT_MODE, k)
  82. return cipher.doFinal(data)
  83. } // Fun encrypt()
  84. /**
  85. * 生成密钥
  86. *
  87. * @param seed
  88. * @return
  89. * @throws IOException
  90. * @throws NoSuchAlgorithmException
  91. */
  92. @Throws(IOException::class, NoSuchAlgorithmException::class)
  93. @JvmOverloads
  94. fun initKey(seed: String? = null): String? {
  95. val secureRandom = if (seed != null) {
  96. SecureRandom(Base64.getDecoder().decode(seed))
  97. } else {
  98. SecureRandom()
  99. }
  100. val kg = KeyGenerator.getInstance(ALGORITHM)
  101. kg.init(secureRandom)
  102. val secretKey = kg.generateKey()
  103. return Base64.getEncoder().encodeToString(secretKey.encoded)
  104. }
  105. }
  106. }