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package com.xcg.webapp.common; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.nio.charset.StandardCharsets; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.util.Base64; /** * 加密/解密 * */ public class EncryptUtil { /** * @param text 明文/base64密文 * @param key 密钥 AES必须16字节/DES必须8字节/TripleDES必须24字节 * @param transformation 转换方式 AES/DES * @param mode 加密/解密 */ public static String extracted(String text, String key, String transformation, boolean mode) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException { Cipher cipher = Cipher.getInstance(transformation); //key与给定的密钥内容相关联的密钥算法的名称 SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), transformation); //Cipher 的操作模式,加密模式:ENCRYPT_MODE、 解密模式:DECRYPT_MODE、包装模式:WRAP_MODE 或 解包装:UNWRAP_MODE) cipher.init(mode ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE, secretKeySpec); byte[] bytes = cipher.doFinal(mode ? text.getBytes(StandardCharsets.UTF_8) : Base64.getDecoder().decode(text)); return mode ? new String(Base64.getEncoder().encode(bytes)) : new String(bytes); } // 原文链接:https://blog.csdn.net/qq_51534884/article/details/130361254 public static String encrypt(String key, String plaintext) { try { byte[] keyBytes = key.getBytes(); SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); byte[] iv = cipher.getParameters().getParameterSpec(IvParameterSpec.class).getIV(); cipher.init(Cipher.ENCRYPT_MODE, keySpec, new IvParameterSpec(iv)); byte[] ciphertext = cipher.doFinal(plaintext.getBytes()); return Base64.getEncoder().encodeToString(iv) + ":" + Base64.getEncoder().encodeToString(ciphertext); } catch (Exception e) { throw new RuntimeException(e); } } public static String decrypt(String key, String ciphertext) { try { byte[] keyBytes = key.getBytes(); String[] parts = ciphertext.split(":"); byte[] iv = Base64.getDecoder().decode(parts[0]); byte[] encrypted = Base64.getDecoder().decode(parts[1]); SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, keySpec, new IvParameterSpec(iv)); byte[] plaintext = cipher.doFinal(encrypted); return new String(plaintext); } catch (Exception e) { throw new RuntimeException(e); } } // 原文链接:https://cloud.tencent.com/developer/information/%E7%94%A8Java%E5%8A%A0%E5%AF%86%E5%92%8C%E8%A7%A3%E5%AF%86%E5%AF%86%E7%A0%81 }
用
String text = "你好世界!!"; String key = "12345678";//des必须8字节 // 算法/模式/填充 默认 DES/ECB/PKCS5Padding String transformation = "DES"; String key1 = "abcd56781234abcd";//aes必须16字节 String transformation1 = "AES"; String key2 = "123456781234567812345678";//TripleDES使用24字节的key String transformation2 = "TripleDes"; // String extractedStr = AESDESUtil.extracted(text, key1, transformation1, true); // System.out.println("AES加密:" + extractedStr); // String extractedStr1 = AESDESUtil.extracted(extractedStr, key1, transformation1, false); // System.out.println("解密:" + extractedStr1); // 原文链接:https://blog.csdn.net/qq_51534884/article/details/130361254 String extractedStr = EncryptUtil.encrypt(key1, text); System.out.println("AES加密:" + extractedStr); String extractedStr1 = EncryptUtil.decrypt(key1, extractedStr); System.out.println("AES解密:" + extractedStr1);
标签:AES,加密,String,import,解密,Cipher,key,new,java From: https://www.cnblogs.com/xsj1989/p/18404547