Des加密解密算法java实现
package tech.fullink.eaglehorn.utils; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import javax.crypto.spec.IvParameterSpec; /** * DES CBC 加密、解密算法 * * @author xiaoliang.chen * @version $Id: DesCbcSecurity.java, v 0.1 2017年12月16日 下午12:55:29 xiaoliang.chen Exp $ */ public class DesCbcSecurity { public static final String SECRET_DES = "DES"; public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding"; public static void main(String[] args) throws Exception { String aaaString = "{\"customerUserId\": \"10\",\"customerUserType\": 1,\"name\": \"hello\",\"mobile\": \"13366666666\",\"idCardNo\": \"330106200009096666\",\"deviceId\": \"qwert\",\"token\": \"qwertyuiop12345\"}"; String key = "0uw5Wzwe"; System.out.println("加密前:" + aaaString); String encrypedString = encrypt(aaaString, key); System.out.println("加密后: " + encrypedString); String bString = decrypt(encrypedString, key); System.out.println("解密后:" + bString); } /** * 加密 * @author xiaoliang.chen * 2017年12月16日 下午12:59:28 * @param content * @param key * @return */ public static String encrypt(String content, String key) { return byteToHexString(encrypt(content.getBytes(), key.getBytes())); } public static byte[] encrypt(byte[] content, byte[] keyBytes) { try { DESKeySpec keySpec = new DESKeySpec(keyBytes); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(SECRET_DES); SecretKey key = keyFactory.generateSecret(keySpec); Cipher cipher = Cipher.getInstance(ALGORITHM_DES); cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(keySpec.getKey())); byte[] result = cipher.doFinal(content); return result; } catch (Exception e) { e.printStackTrace(); } return null; } /** * 解密 * @author xiaoliang.chen * 2017年12月16日 下午1:01:01 * @param content * @param key * @return */ public static String decrypt(String content, String key) { byte[] contentBytes = hexStringToBytes(content); return decrypt(contentBytes, key.getBytes()); } public static String decrypt(byte[] content, byte[] keyBytes) { try { DESKeySpec keySpec = new DESKeySpec(keyBytes); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(SECRET_DES); SecretKey key = keyFactory.generateSecret(keySpec); Cipher cipher = Cipher.getInstance(ALGORITHM_DES); cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(keyBytes)); byte[] result = cipher.doFinal(content); String contentString = new String(result); return contentString; } catch (Exception e) { e.printStackTrace(); } return null; } public static String byteToHexString(byte[] bytes) { StringBuffer sb = new StringBuffer(bytes.length); String sTemp; for (int i = 0; i < bytes.length; i++) { sTemp = Integer.toHexString(0xFF & bytes[i]); if (sTemp.length() < 2) sb.append(0); sb.append(sTemp.toUpperCase()); } return sb.toString(); } public static byte[] hexStringToBytes(String hexString) { if (hexString == null || hexString.equals("")) { return null; } hexString = hexString.toUpperCase(); int length = hexString.length() / 2; char[] hexChars = hexString.toCharArray(); byte[] d = new byte[length]; for (int i = 0; i < length; i++) { int pos = i * 2; d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1])); } return d; } private static byte charToByte(char c) { return (byte) "0123456789ABCDEF".indexOf(c); } }