MD5加密

#import "MD5Untils.h"
#define MD5_LENGTH 16
#import <CommonCrypto/CommonDigest.h>
@implementation MD5Untils

+ (NSString *)MD5WithStr:(NSString *)originStr{
    
      const char *cString = [originStr UTF8String];
      unsigned char result[CC_MD5_DIGEST_LENGTH];
      CC_MD5(cString, (CC_LONG)originStr.length, result);
      NSMutableString *designStr = [NSMutableString string];
    
     for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) {
        
        [designStr appendFormat:@"%02x", result[i]];
        
    }
    
         return designStr;
    
    
}


@end