RSAsecurity.javapackage com.mstf.rsa; import java.security.KeyFactory;import java.security.KeyPair;import java.security.
RSAsecurity.java
package com.mstf.rsa; import java.security.KeyFactory;import java.security.KeyPair;import java.security.KeyPairGenerator;import java.security.PrivateKey;import java.security.PublicKey;import java.security.interfaces.RSAPrivateKey;import java.security.interfaces.RSAPublicKey;import java.security.spec.PKCS8EncodedKeySpec;import java.security.spec.X509EncodedKeySpec; import javax.crypto.Cipher; import com.sun.org.apache.xerces.internal.impl.dv.util.Base64; public class RSAsecurity { public static String src = "admin"; public void priENpubDE() { try { // 初始化秘钥 KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA"); // 秘钥长度 keyPairGenerator.initialize(1024); // 初始化秘钥对 KeyPair keyPair = keyPairGenerator.generateKeyPair(); // 公钥 RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPair.getPublic(); // 私钥 RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPair.getPrivate(); // 2.私钥加密,公钥解密----加密 // 生成私钥 PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaPrivateKey.getEncoded()); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec); // Cipher类为加密和解密提供密码功能,通过getinstance实例化对象 Cipher cipher = Cipher.getInstance("RSA"); // 初始化加密 cipher.init(Cipher.ENCRYPT_MODE, privateKey); byte[] result = cipher.doFinal(src.getBytes()); System.out.println("私钥加密,公钥解密----加密:" + Base64.encode(result)); // 3.私钥加密,公钥解密----解密 // 生成公钥 X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(rsaPublicKey.getEncoded()); keyFactory = KeyFactory.getInstance("RSA"); PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec); cipher = Cipher.getInstance("RSA"); // 初始化解密 cipher.init(Cipher.DECRYPT_MODE, publicKey); result = cipher.doFinal(result); System.out.println("私钥加密,公钥解密----解密:" + new String(result)); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void pubENpriDE() { try { // 1.初始化秘钥 KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA"); // 秘钥长度 keyPairGenerator.initialize(512); // 初始化秘钥对 KeyPair keyPair = keyPairGenerator.generateKeyPair(); // 公钥 RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPair.getPublic(); // 私钥 RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPair.getPrivate(); // 2.公钥加密,私钥解密----加密 X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(rsaPublicKey.getEncoded()); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec); // 初始化加密 // Cipher类为加密和解密提供密码功能,通过getinstance实例化对象 Cipher cipher = Cipher.getInstance("RSA"); cipher.init(Cipher.ENCRYPT_MODE, publicKey); // 加密字符串 byte[] result = cipher.doFinal(src.getBytes()); System.out.println("公钥加密,私钥解密----加密:" + Base64.encode(result)); // 3.公钥加密,私钥解密-----解密 PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaPrivateKey.getEncoded()); keyFactory = KeyFactory.getInstance("RSA"); PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec); // 初始化解密 cipher.init(Cipher.DECRYPT_MODE, privateKey); // 解密字符串 result = cipher.doFinal(result); System.out.println("公钥加密,私钥解密-----解密:" + new String(result)); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }}
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本文标题: RSA加密的方式和解密方式实现方法(推荐)
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