From: 권석근 (kwonsk@mutech.co.kr)
Date: Tue Mar 07 2000 - 21:23:15 EST
Hi, all
some of you have better idea than me and could improve
speed. here is tinylogin i've patched. I want to hear
about clean and better result.
Thanks
kwonsk
-----원본 메시지-----
보낸 사람: Colin Plumb <colin@pgp.com>
받는 사람: ucsimm@uClinux.com <ucsimm@uClinux.com>
참조: colin@pgp.com <colin@pgp.com>
날짜: 2000년 3월 8일 수요일 오전 8:47
제목: Re: [uCsimm] tinylogin
>If you're looking at alternative password hashing algorithms,
>I'd go with TEA. This is called "Tiny Encryption Algorithm" for
>very good reason.
>
>I'd also recommend a bigger salt than Unix normally uses,
>and an iteration count, so you're not stuck with the normal
>Unix login count of 25.
>
>Source code for TEA (including 68K asm) can be found at
>http://vader.brad.ac.uk/tea/source.shtml
>
>Oh, it helps to know the Davies-Meyer construction
>for cryptographic hashes. You basically do
>
>cipher_block
>hash(key_block *input, size_t inputlen)
>{
> cipher_block result = FIXED_IV_VALUE;
> key_block key;
>
> while (inputlen--) {
> key = *input++;
> result ^= ENCRYPT(result, key);
> }
> return output;
>}
>
>If you look at MD5, it's basically this, with a special cipher
>with a 128-bit block size and a 512-bit key size. You can just
>use TEA with a 64-bit block size and a 128-bit key size.
>--
> -Colin
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>
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