Re: [freenet-dev] Breaking CHK compatibility in 0.6?

[Nick Tarleton]

On Monday 21 July 2003 08:24 pm, Nick Tarleton wrote:
> To me, it looks like a CHK contains log2 of the (padded) size of the data.
> From ClientCHK.encode:
> chk = new CHK(storables, Util.log2(getPaddedLength()));
> In about an hour expect some code to pull that out of a text CHK. ;-)

And here it is. Seems to work quite well.
-- 
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Nick Tarleton - [EMAIL PROTECTED] - PGP key available

import freenet.client.*;
import freenet.Key;

public class CHKSize {
	public static void main(String[] args) throws Exception {
		ClientKey clientKey = ClientCHK.createFromRequestURI(new FreenetURI(args[0]));
		Key key = clientKey.getKey();
		byte[] val = key.getVal();
		byte log2size = val[val.length - 3];
		System.out.print("Estimated key size: ");
		System.out.println(Math.pow(2.0, (double)(log2size & 0xFF)));
	}
}