//
//  NSString+MD5.m
//  RestKit
//
//  Created by Jeff Arena on 4/4/11.
//  Copyright 2011 Two Toasters. All rights reserved.
//

#import "NSString+MD5.h"
#import <CommonCrypto/CommonDigest.h>

@implementation NSString (MD5)

- (NSString*)MD5 {
	// Create pointer to the string as UTF8
	const char* ptr = [self UTF8String];

	// Create byte array of unsigned chars
	unsigned char md5Buffer[CC_MD5_DIGEST_LENGTH];

	// Create 16 byte MD5 hash value, store in buffer
	CC_MD5(ptr, strlen(ptr), md5Buffer);

	// Convert MD5 value in the buffer to NSString of hex values
	NSMutableString* output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
	for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) {
		[output appendFormat:@"%02x",md5Buffer[i]];
	}

	return output;
}

@end