使用JCE / JCA从主密钥导出密钥

本文介绍了使用JCE / JCA从主密钥导出密钥的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 有些人可能指向正确的方向吗？ 我想使用JCE / JCA从主密钥导出新密钥，我如何解决方案 JCA提供标准密码的密钥派生函数，如 PKCS＃5 v2.0中定义的PBKDF2 和 RFC 2898 。该算法从主秘密（密码）创建一些随机材料，以便生成适合于给定密码的密钥。 public byte [] derivedKey（String password，byte [] salt，int keyLen）{ SecretKeyFactory kf = SecretKeyFactory .getInstance（PBKDF2WithHmacSHA1）; KeySpec specs = new PBEKeySpec（password.toCharArray（），salt，1024，keyLen）; SecretKey key = kf.generateSecret（specs）; return key.getEncoded（）; } public byte [] encrypt（String password，byte [] plaintext）{ byte [] salt = new byte [64] Random rnd = new Random（）; rnd.nextByte（salt）; byte [] data = derivKey（password，salt，192）; SecretKey desKey = SecretKeyFactory.getInstance（DESede）。generateSecret（new DESedeKeySpec（data））; Cipher cipher = Cipher.getInstance（DESede / CBC / PKCS5Padding）; cipher.init（Cipher.ENCRYPT_MODE，desKey）; return cipher.doFinal（plaintext）; } Can some point me in the right direction?I'd like to use JCE/JCA to derive a new key from a master secret key, How can I achieve this?Regards. 解决方案 The JCA provides standard password-based key derivation functions like PBKDF2 defined in PKCS#5 v2.0 and RFC 2898. This algorithm creates some random material from a master secret (a password) in order to generate a key suitable for a given cipher. public byte[] deriveKey(String password, byte[] salt, int keyLen) { SecretKeyFactory kf = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1"); KeySpec specs = new PBEKeySpec(password.toCharArray(), salt, 1024, keyLen); SecretKey key = kf.generateSecret(specs); return key.getEncoded();}public byte[] encrypt(String password, byte[] plaintext) { byte[] salt = new byte[64]; Random rnd = new Random(); rnd.nextByte(salt); byte[] data = deriveKey(password, salt, 192); SecretKey desKey = SecretKeyFactory.getInstance("DESede").generateSecret(new DESedeKeySpec(data)); Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, desKey); return cipher.doFinal(plaintext);} 这篇关于使用JCE / JCA从主密钥导出密钥的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！