35 lines
754 B
Objective-C
35 lines
754 B
Objective-C
//
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// NSData+MD5.m
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// Cog
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//
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// Created by Christopher Snowhill on 10/9/13.
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//
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//
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#import <CommonCrypto/CommonDigest.h>
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#import "NSData+MD5.h"
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@implementation NSData (MD5)
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- (NSString *)MD5 {
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// Create pointer to the string as UTF8
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const void *ptr = [self bytes];
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NSUInteger len = [self length];
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// Create byte array of unsigned chars
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unsigned char md5Buffer[CC_MD5_DIGEST_LENGTH];
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// Create 16 byte MD5 hash value, store in buffer
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CC_MD5(ptr, (int)len, md5Buffer);
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// Convert MD5 value in the buffer to NSString of hex values
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NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
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for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
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[output appendFormat:@"%02x", md5Buffer[i]];
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return output;
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}
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@end
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