【OBJC类扩展之MD5加密】NSString+MD5

#import<Foundation/Foundation.h>
@interface NSString (md5)
- (NSString *) md5;
@end
 
#import “NSString+MD5.h”
#import<CommonCrypto/CommonDigest.h>
@implementation NSString (md5)
- (NSString *) md5
{
const char *cStr = [selfUTF8String];
unsigned char result[16];
CC_MD5( cStr, strlen(cStr),result );
NSMutableString *hash =[NSMutableString string];
for (int i = 0; i < 16; i++)
[hashappendFormat:@"%02X", result[i]];
return [hash uppercaseString];
}
@end