Java security KeyStore Cipher

最新推荐文章于 2024-10-15 10:23:16 发布

转载最新推荐文章于 2024-10-15 10:23:16 发布 · 150 阅读

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原文链接：https://my.oschina.net/fangwei/blog/717253

文章标签：

#java #python #数据库

本文通过一个具体的示例展示了如何使用Java密钥工具(keytool)生成密钥对，并进行加密与解密操作。首先介绍了如何生成带有密码保护的密钥库文件，接着演示了如何加载该密钥库并获取其中的证书。最后，利用获得的公钥和私钥完成了信息的加密和解密过程。

2019独角兽企业重金招聘Python工程师标准>>>

http://docs.oracle.com/javase/7/docs/technotes/guides/security/crypto/CryptoSpec.html

//c:\Program Files\Java\jdk1.7.0_01\bin>keytool.exe -genkeypair -alias alex -keyalg RSA -keysize 1024 -storepass 123456 -v
		
		KeyStore keyStore = KeyStore.getInstance("jks");
		char[] password = "123456".toCharArray();
		keyStore.load(new FileInputStream("c:/users/administrator/.keystore"), password);
		Enumeration<String> aliases = keyStore.aliases();
		while(aliases.hasMoreElements()){
			String element = aliases.nextElement();
			System.out.println(element);
		}
		String alias = "alex";
		Certificate cer = keyStore.getCertificate(alias);
		String s = cer.toString();
		System.out.println(s);
		System.out.println("public key algorithm:"+cer.getPublicKey().getAlgorithm());
		Cipher cipher = Cipher.getInstance(cer.getPublicKey().getAlgorithm());
		cipher.init(Cipher.ENCRYPT_MODE, cer);
		byte[] msg = cipher.doFinal("hello alex".getBytes());
		System.out.println("encrypt result:"+new String(msg));
		
		Key key = keyStore.getKey(alias, password);
		String algorithm = key.getAlgorithm();
		System.out.println("key algorithm:"+algorithm);
		cipher = Cipher.getInstance(algorithm);
		cipher.init(Cipher.DECRYPT_MODE, key);
		byte[] result = cipher.doFinal(msg);
		System.out.println("decrypt result:"+new String(result));

转载于:https://my.oschina.net/fangwei/blog/717253