AES算法的java实现

import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import net.sf.json.JSONObject; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; /** * AES 是一种可逆加密算法，对用户的敏感信息加密处理 对原始数据进行AES加密后，在进行Base64编码转化； */ @SuppressWarnings("restriction") public class AESOperatorKit { /* * 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，key需要为16位。 */ private String sKey = "12345678";// key，可自行修改 private String ivParameter = "abcdefg";// 偏移量,可自行修改 private static AESOperatorKit instance = null; private AESOperatorKit() { } public static AESOperatorKit getInstance() { if (instance == null) instance = new AESOperatorKit(); return instance; } public static String Encrypt(String encData, String secretKey, String vector) throws Exception { if (secretKey == null) { return null; } if (secretKey.length() != 16) { return null; } Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); byte[] raw = secretKey.getBytes(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); IvParameterSpec iv = new IvParameterSpec(vector.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度 cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv); byte[] encrypted = cipher.doFinal(encData.getBytes("utf-8")); return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。 } // 加密 public String encrypt(String sSrc) throws Exception { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); byte[] raw = sKey.getBytes(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度 cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv); byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8")); // return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。 return parseByte2HexStr(encrypted);// 使用16进制加密 } /** * aes+base64加密 * * @param sSrc * @param uriSafe * @return * @throws Exception */ public String encrypt(String sSrc, boolean uriSafe) throws Exception { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); byte[] raw = sKey.getBytes(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度 cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv); byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8")); String resultStr = new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。 if (uriSafe) { // 如果是uriSafe +替换为- /替换为_ =替换为@ resultStr = resultStr.replace("+", "-"); resultStr = resultStr.replace("/", "_"); resultStr = resultStr.replace("=", "@"); } return resultStr; } public static String parseByte2HexStr(byte[] buf) { StringBuffer sb = new StringBuffer(); for (int i = 0; i < buf.length; i++) { String hex = Integer.toHexString(buf[i] & 0xFF); if (hex.length() == 1) { hex = '0' + hex; } sb.append(hex.toUpperCase()); } return sb.toString(); } public static byte[] parseHexStr2Byte(String hexStr) { if (hexStr.length() < 1) return null; byte[] result = 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); result[i] = ((byte) (high * 16 + low)); } return result; } // 解密 public String decrypt(String sSrc) throws Exception { try { byte[] raw = sKey.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes()); cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv); // byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// // 先用base64解密 byte[] encrypted1 = parseHexStr2Byte(sSrc);// 使用16进制 byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original, "utf-8"); return originalString; } catch (Exception ex) { return null; } } /** * aes+base64 解密 * * @param sSrc * @param uriSafe 是否使用了uri安全转换 * @return * @throws Exception */ public String decryptBase64(String sSrc, boolean uriSafe) throws Exception { try { byte[] raw = sKey.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes()); cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv); if (uriSafe) { // 如果是uriSafe +替换为- /替换为_ =替换为@ sSrc = sSrc.replace("-", "+"); sSrc = sSrc.replace("_", "/"); sSrc = sSrc.replace("@", "="); } byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密 byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original, "utf-8"); return originalString; } catch (Exception ex) { return null; } } public String decrypt(String sSrc, String key, String ivs) throws Exception { try { byte[] raw = key.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(ivs.getBytes()); cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv); byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密 byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original, "utf-8"); return originalString; } catch (Exception ex) { return null; } } public static String encodeBytes(byte[] bytes) { StringBuffer strBuf = new StringBuffer(); for (int i = 0; i < bytes.length; i++) { strBuf.append((char) (((bytes[i] >> 4) & 0xF) + ((int) 'a'))); strBuf.append((char) (((bytes[i]) & 0xF) + ((int) 'a'))); } return strBuf.toString(); } public static void main(String[] args) throws Exception { //加密 String params = AESOperatorKit.getInstance().encrypt("ABCDEFG", true); System.out.println(params); //解密 String srcStr = AESOperatorKit.getInstance().decryptBase64(params, true); System.out.println(srcStr); } }