NSString md5

gistfile1.txt

// method to calculate a standard md5 checksum of this string, check against: http://www.adamek.biz/md5-generator.php
- (NSString * )md5
{
	const char *cStr = [self UTF8String];
	unsigned char result [CC_MD5_DIGEST_LENGTH];
	CC_MD5( cStr, strlen(cStr), result );
	
	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]
			];
}

You could just use NSString -initWithBytes:length:encoding:.

Don't think so, that would not get the hex encoding