init version

mxpopstar

2022-05-03 e75ef5f04f61aa5fbd89fd5c413dcee1819b7a91

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package com.app.reg;
 
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
 
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.spec.SecretKeySpec;
 
public class AesUtils {
    /**
      * ¼ÓÃÜ
     * 
      * @param content ÐèÒª¼ÓÃܵÄÄÚÈÝ
     * @param password  ¼ÓÃÜÃÜÂë
     * @return
      */ 
     public static byte[] encrypt(String content, String password) { 
             try {
                     KeyGenerator kgen = KeyGenerator.getInstance("AES"); 
                     kgen.init(128, new SecureRandom(password.getBytes())); 
                     SecretKey secretKey = kgen.generateKey(); 
                     byte[] enCodeFormat = secretKey.getEncoded(); 
                     SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES"); 
                     Cipher cipher = Cipher.getInstance("AES");// ´´½¨ÃÜÂëÆ÷ 
                     byte[] byteContent = content.getBytes("utf-8"); 
                     cipher.init(Cipher.ENCRYPT_MODE, key);// ³õʼ»¯ 
                     byte[] result = cipher.doFinal(byteContent); 
                     return result; // ¼ÓÃÜ 
             } catch (NoSuchAlgorithmException e) { 
                     e.printStackTrace(); 
             } catch (NoSuchPaddingException e) { 
                     e.printStackTrace(); 
             } catch (InvalidKeyException e) { 
                     e.printStackTrace(); 
             } catch (UnsupportedEncodingException e) { 
                     e.printStackTrace(); 
             } catch (IllegalBlockSizeException e) { 
                     e.printStackTrace(); 
             } catch (BadPaddingException e) { 
                     e.printStackTrace(); 
             } 
             return null; 
     } 
     
     /**½âÃÜ
      * @param content  ´ý½âÃÜÄÚÈÝ
      * @param password ½âÃÜÃÜÔ¿
      * @return
       */ 
      public static byte[] decrypt(byte[] content, String password) { 
              try { 
                       KeyGenerator kgen = KeyGenerator.getInstance("AES"); 
                       kgen.init(128, new SecureRandom(password.getBytes())); 
                       SecretKey secretKey = kgen.generateKey(); 
                       byte[] enCodeFormat = secretKey.getEncoded(); 
                       SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");             
                       Cipher cipher = Cipher.getInstance("AES");// ´´½¨ÃÜÂëÆ÷ 
                      cipher.init(Cipher.DECRYPT_MODE, key);// ³õʼ»¯ 
                      byte[] result = cipher.doFinal(content); 
                      return result; // ¼ÓÃÜ 
              } catch (NoSuchAlgorithmException e) { 
                      e.printStackTrace(); 
              } catch (NoSuchPaddingException e) { 
                      e.printStackTrace(); 
              } catch (InvalidKeyException e) { 
                      e.printStackTrace(); 
              } catch (IllegalBlockSizeException e) { 
                      e.printStackTrace(); 
              } catch (BadPaddingException e) { 
                      e.printStackTrace(); 
              } 
              return null; 
      }
      
      
      /**½«¶þ½øÖÆת»»³É16½øÖÆ
       * @param buf
        * @return
        */ 
       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(); 
       } 
       
       /**½«16½øÖÆת»»Îª¶þ½øÖÆ
        * @param hexStr
         * @return
         */ 
        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; 
        } 
        
        /**
           * ¼ÓÃÜ
          *
           * @param content ÐèÒª¼ÓÃܵÄÄÚÈÝ
          * @param password  ¼ÓÃÜÃÜÂë
          * @return
           */ 
        public static byte[] encrypt2(String content, String password) { 
                  try { 
                          SecretKeySpec key = new SecretKeySpec(password.getBytes(), "AES"); 
                          Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding"); 
                          byte[] byteContent = content.getBytes("utf-8"); 
                          cipher.init(Cipher.ENCRYPT_MODE, key);// ³õʼ»¯ 
                          byte[] result = cipher.doFinal(byteContent); 
                          return result; // ¼ÓÃÜ 
                  } catch (NoSuchAlgorithmException e) { 
                          e.printStackTrace(); 
                  } catch (NoSuchPaddingException e) { 
                          e.printStackTrace(); 
                  } catch (InvalidKeyException e) { 
                          e.printStackTrace(); 
                  } catch (UnsupportedEncodingException e) { 
                          e.printStackTrace(); 
                  } catch (IllegalBlockSizeException e) { 
                          e.printStackTrace(); 
                  } catch (BadPaddingException e) { 
                          e.printStackTrace(); 
                  } 
                  return null; 
          } 
        
        /*
         * ¼ÓÃÜ
         */
        public static String aesEncrypt(String data_str, String pwd)
        {
            byte[] encryptResult = encrypt(data_str, pwd);
            String encryptResultStr = parseByte2HexStr(encryptResult); 
            return encryptResultStr;
        }
        
        /*
         * ½âÃÜ
         */
        public static String aesDecrypt(String data_str, String pwd)
        {
            byte[] decryptFrom = parseHexStr2Byte(data_str);  
            byte[] decryptResult = decrypt(decryptFrom, pwd);  
            return new String(decryptResult);
        }
}