text: //
  //  DataSigner.h
  //  AlixPayDemo
  //
  //  Created by Jing Wen on 8/2/11.
  //  Copyright 2011 alipay.com. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  
  typedef enum DataSignAlgorithm {
  	DataSignAlgorithmRSA,
  	DataSignAlgorithmMD5,
  } DataSignAlgorithm;
  
  @protocol DataSigner
  
  - (NSString *)algorithmName;
  - (NSString *)signString:(NSString *)string;
  
  @end
  
  id<DataSigner> CreateRSADataSigner(NSString *privateKey);
  
  