Suppose that you need to calculate a NSData’s MD5 signature.. for whatever reason. Say… you need to check the backend’s signature.
Well… simply add a NSData extension, with the following method:
- (NSString*)md5
{
unsigned char result[16];
CC_MD5( self.bytes, self.length, result ); // This is the md5 call
return [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
{
unsigned char result[16];
CC_MD5( self.bytes, self.length, result ); // This is the md5 call
return [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
Again, please, don’t you forget the imports!
#import <CommonCrypto/CommonDigest.h>