AES在android和電腦之間返回不同的結果

Question

我的朋友給我一個SecurityAES.java文件。我在PC上使用很好，但是當我在android上使用它時，結果是不同的！我能做什麼？

我使用的代碼在Android：

String formVals = SecurityAES.encryptAES(con, token); 

這裏是代碼：

public class SecurityAES { 
    private final static String encoding = "UTF-8"; 
    public static void main(String[] args) { 
     String str = encryptAES("18382360986%2Cqq200600","uu24sfsd8sdggs"); 

     System.out.println(str); 
     String uriAPI = "http://xxxxxx.com/do/httpapi!apiUserInfo.shtml"; 

     Map parameters=new HashMap(); 

     parameters.put("token", "uu24sfsd8sdggs"); 
     parameters.put("formVals", str); 

     System.out.println(post(uriAPI, parameters, true)); 

    } 
    public static String post(String urlStr, Map parameters, boolean flag) { 
     try { 
      String content = ""; 
      String result = ""; 
      URL url = null; 
      URLConnection conn = null; 
      OutputStreamWriter writer = null; 
      StringBuffer params = new StringBuffer(); 

      for (Iterator iter = parameters.entrySet().iterator(); iter.hasNext();) { 
       Entry element = (Entry) iter.next(); 
       params.append(element.getKey().toString()); 
       params.append("="); 
       params.append(element.getValue().toString()); 
       params.append("&"); 
      } 

      if (params.length() > 0) { 
       params = params.deleteCharAt(params.length() - 1); 
      } 

      try { 
       url = new URL(urlStr); 
       conn = url.openConnection(); 
       conn.setDoOutput(true); 
       conn.setRequestProperty("Referer", ""); 
       conn.setConnectTimeout(3000);// 設置連接主機超時（單位：毫秒） 
       conn.setReadTimeout(3000);// 設置從主機讀取數據超時（單位：毫秒） 

       writer = new OutputStreamWriter(conn.getOutputStream()); 
       writer.write(params.toString()); 
       writer.flush(); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } finally { 
       try { 
        if (writer != null) { 
         writer.close(); 
        } 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
      } 

      InputStreamReader reder = null; 
      BufferedReader breader = null; 
      try { 
       reder = new InputStreamReader(conn.getInputStream(), "utf-8"); 
       breader = new BufferedReader(reder); 
       while ((content = breader.readLine()) != null) { 
        result += content; 
       } 
      } catch (Exception e) { 
      } finally { 
       try { 
        if (reder != null) { 
         reder.close(); 
        } 
        if (breader != null) { 
         breader.close(); 
        } 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 

      } 

      if (result == null || result.equals("")) { 
       result = "|"; 
      } 
      System.out.println(result); 
      return result; 
     } catch (Exception e) { 
      e.printStackTrace(); 
      return ""; 
     } 

    } 
    /** 
    * 
    * @param content 
    * @param password 
    * @return 
    */ 
    public static String encryptAES(String content, String password) { 
     byte[] encryptResult = encrypt(content, password); 
     String encryptResultStr = parseByte2HexStr(encryptResult); 
     encryptResultStr = ebotongEncrypto(encryptResultStr); 
     return encryptResultStr; 
    } 

    /** 
    * 
    * @param encryptResultStr 
    * @param password 
    * @return 
    */ 
    public static String decrypt(String encryptResultStr, String password) { 
     String decrpt = ebotongDecrypto(encryptResultStr); 
     byte[] decryptFrom = parseHexStr2Byte(decrpt); 
     byte[] decryptResult = decrypt(decryptFrom, password); 
     return new String(decryptResult); 
    } 

    /** 
    */ 
    public static String ebotongEncrypto(String str) { 
     BASE64Encoder base64encoder = new BASE64Encoder(); 
     String result = str; 
     if (str != null && str.length() > 0) { 
      try { 
       byte[] encodeByte = str.getBytes(encoding); 
       result = base64encoder.encode(encodeByte); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
     return result.replaceAll("\r\n", "").replaceAll("\r", "").replaceAll("\n", ""); 
    } 

    /** 
    */ 
    public static String ebotongDecrypto(String str) { 
     BASE64Decoder base64decoder = new BASE64Decoder(); 
     try { 
      byte[] encodeByte = base64decoder.decodeBuffer(str); 
      return new String(encodeByte); 
     } catch (IOException e) { 
      e.printStackTrace(); 
      return str; 
     } 
    } 
    /** 
    * 
    * @return 
    */ 
    private static byte[] encrypt(String content, String password) { 
      try {    
        KeyGenerator kgen = KeyGenerator.getInstance("AES"); 
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"); 
        secureRandom.setSeed(password.getBytes()); 
        kgen.init(128, secureRandom); 
        //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");// 
        byte[] byteContent = content.getBytes("utf-8"); 
        cipher.init(Cipher.ENCRYPT_MODE, key); 
        byte[] result = cipher.doFinal(byteContent); 
        return result; 
      } 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; 
    } 


    private static byte[] decrypt(byte[] content, String password) { 
      try { 
        KeyGenerator kgen = KeyGenerator.getInstance("AES"); 

        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"); 
        secureRandom.setSeed(password.getBytes()); 
        kgen.init(128, secureRandom); 
        //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"); 
        cipher.init(Cipher.DECRYPT_MODE, key); 
        byte[] result = cipher.doFinal(content); 
        return result; // 
      } catch (NoSuchAlgorithmException e) { 
      } catch (NoSuchPaddingException e) { 
      } catch (InvalidKeyException e) { 
      } catch (IllegalBlockSizeException e) { 
      } catch (BadPaddingException e) { 
      } 
      return null; 
    } 

    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; 
    } 
} 

Answer 1

除了可怕的代碼，它可能是此行殺死你：

SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"); 

隨機數發生器不是密鑰導出函數（KDF）。如果您想使用密鑰派生方法，請使用例如PBKDF2。

假設在這裏，如果在實例化之後立即對其進行種子處理，（未定義的）SHA1PRNG算法返回相同的值。它只對Oracle提供的實現執行此操作，並且該功能只能用於調試應用程序，因爲即使在Oracle提供程序中，該算法也沒有很好地定義。

換句話說，除非你想要隨機值，否則不要使用SecureRandom。