【OBJC类扩展之MD5加密】NSString+MD5

-(NSString *)md5

{

    const char *cStr = [self UTF8String];

    unsigned char result[16];

    

    CC_MD5(cStr, strlen(cStr), result);

    

    return [NSStringstringWithFormat:

            @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",

            result[0], result[1], result[2], result[3],

            result[4], result[5], result[6], result[7],

            result[8], result[9], result[10], result[11],

            result[12], result[13], result[14], result[15]

            ];

}

#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