cog/Utils/NSData+MD5.m

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//
// NSData+MD5.m
// Cog
//
// Created by Christopher Snowhill on 10/9/13.
//
//
#import <CommonCrypto/CommonDigest.h>
#import "NSData+MD5.h"
@implementation NSData (MD5)
- (NSString*)MD5
{
// Create pointer to the string as UTF8
const void * ptr = [self bytes];
NSUInteger len = [self length];
// 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, (int)len, 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