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Re: Stars! decryption

Tue, 31 July 2018 18:00

ricks03

Officer Cadet 1st Year
Creator of TotalHost and Stars! utilities
Created TotalHost and Stars! utilities

Messages: 222
Registered: January 2012
Location: NC

raptor wrote on Tue, 31 July 2018 13:08

It shows that the header block is not encrypted and that a salt is pulled out from it. This salt is used to encrypt/decrypt the rest of the blocks and is different for every file (I think) - which is why there will always be differences.

Since the password is in the PlayerBlock, it is also encrypted with the salt and will be different between files at the byte level.

Yes, I know the FileHeaderBlock is not encrypted, and that the password, as part of the PlayerBlock, will be encrypted. The salt is pulled from the FileHeaderBlock, and then randomness is initialized with is a combination of the Game ID (which is vaguely unique), the turn, the player #, and the shareware state.

Thanks for the idea. Digging into this, the seed does look to be different between the two different 2401 files. That's awesome. It must be a (more) true random number assigned when the turn is created, which explains the difference in the files, and gives me hope that this will work on .m files as well as .hst files.

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[Message index]

		Stars! decryption By: ricks03 on Fri, 09 March 2018 11:34
		Re: Stars! decryption By: raptor on Fri, 09 March 2018 17:21
		Re: Stars! decryption By: ricks03 on Fri, 09 March 2018 17:35
		Re: Stars! decryption By: raptor on Fri, 09 March 2018 19:08
		Re: Stars! decryption By: ricks03 on Sat, 10 March 2018 02:41
		Re: Stars! decryption By: platon79 on Sat, 10 March 2018 05:19
		Re: Stars! decryption By: ricks03 on Sat, 10 March 2018 11:42
		Re: Stars! decryption By: platon79 on Sun, 11 March 2018 12:42
		Re: Stars! decryption By: ricks03 on Sun, 11 March 2018 13:15
		Re: Stars! decryption By: ricks03 on Sun, 11 March 2018 15:23
		Re: Stars! decryption By: Ron on Mon, 12 March 2018 20:57
		Re: Stars! decryption By: ricks03 on Mon, 12 March 2018 21:34
		Re: Stars! decryption By: ricks03 on Sun, 18 March 2018 11:01
		Re: Stars! decryption By: ricks03 on Tue, 31 July 2018 00:49
		Re: Stars! decryption By: raptor on Tue, 31 July 2018 13:08
		Re: Stars! decryption By: ricks03 on Tue, 31 July 2018 18:00
		Re: Stars! decryption By: ricks03 on Thu, 09 August 2018 18:19
		Re: Stars! decryption By: ricks03 on Sat, 11 August 2018 15:19
		Re: Stars! decryption By: raptor on Sat, 11 August 2018 23:10
		Re: Stars! decryption By: ricks03 on Sun, 12 August 2018 00:59

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