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这期内容当中小编将会给大家带来有关如何在java中实现RSA非对称加密算法,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
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初始化密钥:
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA"); keyPairGenerator.initialize(512); KeyPair keyPair = keyPairGenerator.generateKeyPair(); RSAPrivateKey rsaprivateKey = (RSAPrivateKey)keyPair.getPrivate();//私有密钥 RSAPublicKey rsapublicKey = (RSAPublicKey)keyPair.getPublic();//公有密钥 System.out.println("privateKey : "+Base64.encodeBase64String(rsaprivateKey.getEncoded())); System.out.println("publicKey : "+Base64.encodeBase64String(rsapublicKey.getEncoded()));
1、私钥加密,公钥解密:
//私钥加密,公钥解密--加密 PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaprivateKey.getEncoded()); KeyFactory privateKeyFactory = KeyFactory.getInstance("RSA"); PrivateKey privateKey = privateKeyFactory.generatePrivate(pkcs8EncodedKeySpec); Cipher privateCipher = Cipher.getInstance("RSA"); privateCipher.init(Cipher.ENCRYPT_MODE, privateKey); byte[] result = privateCipher.doFinal(src.getBytes()); System.out.println("私钥加密,公钥解密--加密:"+Base64.encodeBase64String(result)); //私钥加密,公钥解密--解密 X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(rsapublicKey.getEncoded()); KeyFactory publicKeyFactory = KeyFactory.getInstance("RSA"); PublicKey publicKey = publicKeyFactory.generatePublic(x509EncodedKeySpec); Cipher publicCipher = Cipher.getInstance("RSA"); publicCipher.init(Cipher.DECRYPT_MODE, publicKey); result = publicCipher.doFinal(result); System.out.println("私钥加密,公钥解密--解密:"+new String(result));
2、公钥加密,私钥解密:
//公钥加密,私钥解密---加密 x509EncodedKeySpec = new X509EncodedKeySpec(rsapublicKey.getEncoded()); publicKeyFactory = KeyFactory.getInstance("RSA"); publicKey = publicKeyFactory.generatePublic(x509EncodedKeySpec); publicCipher = Cipher.getInstance("RSA"); publicCipher.init(Cipher.ENCRYPT_MODE, publicKey); result = publicCipher.doFinal(src.getBytes()); System.out.println("公钥加密,私钥解密---加密:"+Base64.encodeBase64String(result)); //公钥加密,私钥解密---解密 pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaprivateKey.getEncoded()); privateKeyFactory = KeyFactory.getInstance("RSA"); privateKey = privateKeyFactory.generatePrivate(pkcs8EncodedKeySpec); privateCipher = Cipher.getInstance("RSA"); privateCipher.init(Cipher.DECRYPT_MODE, privateKey); result = privateCipher.doFinal(result); System.out.println("公钥加密,私钥解密---解密:"+new String(result));
上述就是小编为大家分享的如何在java中实现RSA非对称加密算法了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注创新互联行业资讯频道。