How do I create an MD5 Hash of a string in Cocoa?

Question

I know SHA-1 is preferred, but this project requires I use MD5.

#include 

- (NSString*) MD5Hasher: (NSString*) query {
    NSData* hash         


        

Answer 1

I had used this method:

NSString+MD5.h

@interface NSString (MD5)

- (NSString *)MD5;

@end

NSString+MD5.m

#import "NSString+MD5.h"
#import 

@implementation NSString (MD5)

- (NSString *)MD5 {

    const char * pointer = self.UTF8String;
    unsigned char md5Buffer[CC_MD5_DIGEST_LENGTH];

    CC_MD5(pointer, (CC_LONG)strlen(pointer), md5Buffer);

    NSMutableString * string = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
    for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) {
        [string appendFormat:@"%02x", md5Buffer[i]];
    }

    return string;
}

@end

Usage:

NSString * myString = @"test";
NSString * md5 = [myString MD5];