text: //
  //  NSString+Encryption.h
  //  haochang
  //
  //  Created by Administrator on 14-4-15.
  //  Copyright (c) 2014年 Administrator. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NSString (Encryption)
  
  + (NSString *)md5:(NSString *)str;
  
  + (NSString*) sha1:(NSString *)str;
  
  @end
  