参考别人的代码写的aes加密,记录一下
作者:互联网
package org.jimmy.autosearch2019.test; import java.security.SecureRandom; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; public class TestAes2019052801 { public static void main(String[] args) { try { String content = "123456"; String secretKey = "123456"; byte[] encryptedContentBytes = encrypt(content, secretKey); String encryptedContent = parseBinaryToHexStr(encryptedContentBytes); System.out.println("加密前的文本:" + content); System.out.println("加密后的文本:" + encryptedContent); byte[] encryptedContentToBinaryStr = parseHexToBinaryStr(encryptedContent); byte[] decryptedContentBytes = decrypt(encryptedContentToBinaryStr, secretKey); String decryptedContent = new String(decryptedContentBytes); System.out.println("解密后的文本:" + decryptedContent); } catch(Exception e) { e.printStackTrace(); } } /** * @author ラピスラズリ(Dawn) * @date 2019年5月28日 下午2:56:42 * @detail 16进制字符串转换2进制字符串 */ public static byte[] parseHexToBinaryStr(String hexStr) throws Exception { byte[] bytes = null; if(hexStr.length() < 1) { return bytes; } bytes = new byte[hexStr.length() / 2]; for(int i = 0; i < hexStr.length() / 2; i++) { int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16); int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16); bytes[i] = (byte) (high * 16 + low); } return bytes; } /** * @author ラピスラズリ(Dawn) * @date 2019年5月28日 下午2:54:56 * @detail 2进制字符串转换16进制字符串 */ public static String parseBinaryToHexStr(byte[] bytes) throws Exception { StringBuffer sb = new StringBuffer(); for(int i = 0; i < bytes.length; i++) { String hex = Integer.toHexString(bytes[i] & 0xff); if(hex.length() == 1) { hex = "0" + hex; } sb.append(hex.toUpperCase()); } return sb.toString(); } /** * @author ラピスラズリ(Dawn) * @date 2019年5月28日 下午3:30:33 * @detail 解密 */ public static byte[] decrypt(byte[] content, String secretKey) throws Exception { KeyGenerator keyGenerator = KeyGenerator.getInstance("AES"); keyGenerator.init(128, new SecureRandom(secretKey.getBytes())); SecretKey generatedSecretKey = keyGenerator.generateKey(); byte[] encodedBytes = generatedSecretKey.getEncoded(); SecretKeySpec secretKeySpec = new SecretKeySpec(encodedBytes, "AES"); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.DECRYPT_MODE, secretKeySpec); byte[] result = cipher.doFinal(content); return result; } /** * @author ラピスラズリ(Dawn) * @date 2019年5月28日 下午2:55:25 * @detail aes加密 */ public static byte[] encrypt(String content, String secretKey) throws Exception { // 创建AES的Key生产者 KeyGenerator keyGenerator = KeyGenerator.getInstance("AES"); // 利用用户密码作为随机数初始化出 // 128位的key生产者 //加密没关系,SecureRandom是生成安全随机数序列,password.getBytes()是种子, //只要种子相同,序列就一样,所以解密只要有password就行 keyGenerator.init(128, new SecureRandom(secretKey.getBytes())); // 根据用户密码,生成一个密钥 SecretKey generatedSecretKey = keyGenerator.generateKey(); // 返回基本编码格式的密钥,如果此密钥不支持编码,则返回 byte[] encodedBytes = generatedSecretKey.getEncoded(); // 转换为AES专用密钥 SecretKeySpec secretKeySpec = new SecretKeySpec(encodedBytes, "AES"); // 创建密码器 Cipher cipher = Cipher.getInstance("AES"); byte[] contentBytes = content.getBytes("utf-8"); // 初始化为加密模式的密码器 cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec); //加密 byte[] result = cipher.doFinal(contentBytes); return result; } }
标签:aes,加密,String,代码,bytes,AES,secretKey,Cipher,byte 来源: https://www.cnblogs.com/JimmySeraph/p/10937699.html