java 中DH的方式实现非对称加密的实例
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2024-02-12 20:51:10
java 中dh的方式实现非对称加密的实例
实现代码:
package com.sahadev;
import java.security.keyfa...
java 中dh的方式实现非对称加密的实例
实现代码:
package com.sahadev; import java.security.keyfactory; import java.security.keypair; import java.security.keypairgenerator; import java.security.privatekey; import java.security.publickey; import java.security.spec.x509encodedkeyspec; import java.util.objects; import javax.crypto.cipher; import javax.crypto.keyagreement; import javax.crypto.secretkey; import javax.crypto.interfaces.dhpublickey; import javax.crypto.spec.dhparameterspec; import org.apache.commons.codec.binary.hex; public class dh { public static string src = "hello,sahadev!"; public static void main(string[] args) { jdkdh(); } public static void jdkdh() { try { // 初始化发送方密钥 keypairgenerator senderkeypairgenerator = keypairgenerator.getinstance("dh"); senderkeypairgenerator.initialize(512); keypair senderkeypair = senderkeypairgenerator.generatekeypair(); byte[] senderpublickey = senderkeypair.getpublic().getencoded(); // 初始化接收方的密钥 keyfactory instance = keyfactory.getinstance("dh"); x509encodedkeyspec x509encodedkeyspec = new x509encodedkeyspec(senderpublickey); publickey sendpublickeytemp = instance.generatepublic(x509encodedkeyspec); dhparameterspec dhparameterspec = ((dhpublickey) sendpublickeytemp).getparams(); keypairgenerator keypairgenerator = keypairgenerator.getinstance("dh"); keypairgenerator.initialize(dhparameterspec); // 接收方生成密钥 keypair generatekeypair = keypairgenerator.generatekeypair(); byte[] receiverpublickey = generatekeypair.getpublic().getencoded(); privatekey receiverprivatekey = generatekeypair.getprivate(); // 接收方密钥构建 keyagreement receiverkeyagreement = keyagreement.getinstance("dh"); receiverkeyagreement.init(receiverprivatekey); receiverkeyagreement.dophase(senderkeypair.getpublic(), true); // 使用我的密钥和你的公钥生成密钥 secretkey receiverdeskey = receiverkeyagreement.generatesecret("des"); // 发送方密钥构建 keyfactory keyfactory = keyfactory.getinstance("dh"); x509encodedkeyspec x509encodedkeyspec2 = new x509encodedkeyspec(receiverpublickey); publickey receiverpublickeytemp = keyfactory.generatepublic(x509encodedkeyspec2); // 发送方拿到接收方返回的公钥做本地密钥 keyagreement senderkeyagreement = keyagreement.getinstance("dh"); senderkeyagreement.init(senderkeypair.getprivate()); senderkeyagreement.dophase(receiverpublickeytemp, true); // 使用你的密钥我的公钥进行构建 secretkey senderdeskey = senderkeyagreement.generatesecret("des"); // 判断双方的本地密钥是否相同 if (objects.equals(receiverdeskey, senderdeskey)) { system.out.println("双方密钥相同"); } // 加密 cipher cipher = cipher.getinstance("des"); cipher.init(cipher.encrypt_mode, senderdeskey); byte[] result = cipher.dofinal(src.getbytes()); system.out.println("加密结果为 : " + hex.encodehexstring(result)); // 解密 cipher.init(cipher.decrypt_mode, senderdeskey); result = cipher.dofinal(result); system.out.println("解密结果为 : " + new string(result)); } catch (exception e) { e.printstacktrace(); } } }
附上结果:
双方密钥相同 des : da1cc13d388423e82a110539414b1ec0 解密结果为 : hello,sahadev!
以上就是dh实现非对称加密的实例,如有 疑问请留言或者到本站社区交流讨论,感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!