DES加密解密（适用的Windows和Linux系统），防止Linux的下解密失败工具类

package com.avic.controller.user.utls; import java.net.URLEncoder; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; import java.security.spec.InvalidKeySpecException; import java.util.Arrays; import java.util.Date; import java.util.HashMap; import java.util.Map; import java.util.Set; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import org.apache.commons.lang3.StringUtils; public class DESEncrypt { private static final String DES_ALGORITHM = "DES"; private static final DESEncrypt desEncrypt = new DESEncrypt(); private DESEncrypt() { } public static DESEncrypt getInstance() { return desEncrypt; } /** * DES加密 * * @param plainData * @param secretKey * @return * @throws Exception */ public String createSign(Map<String, Object> params, boolean encode, String secretKey) throws Exception { Cipher cipher = null; try { cipher = Cipher.getInstance(DES_ALGORITHM); cipher.init(Cipher.ENCRYPT_MODE, generateKey1(secretKey)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (NoSuchPaddingException e) { e.printStackTrace(); } catch (InvalidKeyException e) { } try { // 为了防止解密时报javax.crypto.IllegalBlockSizeException: Input length must // be multiple of 8 when decrypting with padded cipher异常， // 不能把加密后的字节数组直接转换成字符串 Set<String> keysSet = params.keySet(); Object[] keys = keysSet.toArray(); Arrays.sort(keys); StringBuffer temp = new StringBuffer(); boolean first = true; for (Object key : keys) { if (first) { first = false; } else { temp.append("&"); } temp.append(key).append("="); Object value = params.get(key); String valueString = ""; if (null != value) { valueString = String.valueOf(value); } if (encode) { temp.append(URLEncoder.encode(valueString, "UTF-8")); } else { temp.append(valueString); } } byte[] buf = cipher.doFinal(String.valueOf(temp).getBytes()); return Base64Utils.encode(buf); } catch (IllegalBlockSizeException e) { e.printStackTrace(); throw new Exception("IllegalBlockSizeException", e); } catch (BadPaddingException e) { e.printStackTrace(); throw new Exception("BadPaddingException", e); } } /** * DES解密 * * @param secretData * @param secretKey * @return * @throws Exception */ public Map<String, Object> resolveSign(String secretData, String secretKey) throws Exception { Cipher cipher = null; try { cipher = Cipher.getInstance(DES_ALGORITHM); cipher.init(Cipher.DECRYPT_MODE, generateKey1(secretKey)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); throw new Exception("NoSuchAlgorithmException", e); } catch (NoSuchPaddingException e) { e.printStackTrace(); throw new Exception("NoSuchPaddingException", e); } catch (InvalidKeyException e) { e.printStackTrace(); throw new Exception("InvalidKeyException", e); } try { Map<String, Object> ret = new HashMap<String, Object>(); byte[] buf = cipher.doFinal(Base64Utils.decode(secretData.toCharArray())); String[] params = new String(buf).split("&"); for (int i = 0; i < params.length; i++) { String[] param = params[i].split("="); if (StringUtils.isNotBlank(param[0])) { if (param.length > 1) { ret.put(param[0], param[1]); } else { ret.put(param[0], ""); } } } return ret; } catch (IllegalBlockSizeException e) { e.printStackTrace(); throw new Exception("IllegalBlockSizeException", e); } catch (BadPaddingException e) { e.printStackTrace(); throw new Exception("BadPaddingException", e); } } /** * 获得秘密密钥 * * @param secretKey * @return * @throws NoSuchAlgorithmException */ private SecretKey generateKey(String secretKey) throws NoSuchAlgorithmException { SecureRandom secureRandom = new SecureRandom(secretKey.getBytes()); // 为我们选择的DES算法生成一个KeyGenerator对象 KeyGenerator kg = null; try { kg = KeyGenerator.getInstance(DES_ALGORITHM); } catch (NoSuchAlgorithmException e) { } kg.init(secureRandom); // kg.init(56, secureRandom); // 生成密钥 return kg.generateKey(); } /** * 获得密钥 * * @param secretKey * @return * @throws NoSuchAlgorithmException * @throws InvalidKeyException * @throws InvalidKeySpecException */ private SecretKey generateKey1(String secretKey) throws NoSuchAlgorithmException, InvalidKeyException, InvalidKeySpecException { SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES_ALGORITHM); DESKeySpec keySpec = new DESKeySpec(secretKey.getBytes()); keyFactory.generateSecret(keySpec); return keyFactory.generateSecret(keySpec); } public static void main(String[] a) throws Exception { String input = "cy11Xlbrmzyh:604:301:1353064296"; String key = "111111"; // DESEncrypt des = new DESEncrypt(); Map<String, Object> params = new HashMap<String, Object>(); params.put("norce", Math.random()); params.put("userId", 11); params.put("userName", "aaaaa"); params.put("createTime", new Date()); String result = DESEncrypt.getInstance().createSign(params, false, key); System.out.println(result); System.out.println(DESEncrypt.getInstance().resolveSign(result, key)); } static class Base64Utils { static private char[] alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=" .toCharArray(); static private byte[] codes = new byte[256]; static { for (int i = 0; i < 256; i++) codes[i] = -1; for (int i = 'A'; i <= 'Z'; i++) codes[i] = (byte) (i - 'A'); for (int i = 'a'; i <= 'z'; i++) codes[i] = (byte) (26 + i - 'a'); for (int i = '0'; i <= '9'; i++) codes[i] = (byte) (52 + i - '0'); codes['+'] = 62; codes['/'] = 63; } /** * 将原始数据编码为base64编码 */ static public String encode(byte[] data) { char[] out = new char[((data.length + 2) / 3) * 4]; for (int i = 0, index = 0; i < data.length; i += 3, index += 4) { boolean quad = false; boolean trip = false; int val = (0xFF & (int) data[i]); val <<= 8; if ((i + 1) < data.length) { val |= (0xFF & (int) data[i + 1]); trip = true; } val <<= 8; if ((i + 2) < data.length) { val |= (0xFF & (int) data[i + 2]); quad = true; } out[index + 3] = alphabet[(quad ? (val & 0x3F) : 64)]; val >>= 6; out[index + 2] = alphabet[(trip ? (val & 0x3F) : 64)]; val >>= 6; out[index + 1] = alphabet[val & 0x3F]; val >>= 6; out[index + 0] = alphabet[val & 0x3F]; } return new String(out); } /** * 将base64编码的数据解码成原始数据 */ static public byte[] decode(char[] data) { int len = ((data.length + 3) / 4) * 3; if (data.length > 0 && data[data.length - 1] == '=') --len; if (data.length > 1 && data[data.length - 2] == '=') --len; byte[] out = new byte[len]; int shift = 0; int accum = 0; int index = 0; for (int ix = 0; ix < data.length; ix++) { int value = codes[data[ix] & 0xFF]; if (value >= 0) { accum <<= 6; shift += 6; accum |= value; if (shift >= 8) { shift -= 8; out[index++] = (byte) ((accum >> shift) & 0xff); } } } if (index != out.length) throw n