//
//  NSData+MD5.m
//  RestKit
//
//  Created by Jeff Arena on 4/4/11.
//  Copyright (c) 2009-2012 RestKit. All rights reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//

#import <CommonCrypto/CommonDigest.h>
#import "NSData+RKAdditions.h"
#import "RKFixCategoryBug.h"

RK_FIX_CATEGORY_BUG(NSData_RKAdditions)

@implementation NSData (RKAdditions)

- (NSString *)MD5 {
    // Create byte array of unsigned chars
    unsigned char md5Buffer[CC_MD5_DIGEST_LENGTH];

    // Create 16 byte MD5 hash value, store in buffer
    CC_MD5(self.bytes, (CC_LONG) self.length, md5Buffer);

    // Convert unsigned char 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