-(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