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Re: lug-bg: crc sum
- Subject: Re: lug-bg: crc sum
- From: mitko@xxxxxxx (Dimitar Peikov)
- Date: Mon, 10 Jun 2002 10:32:31 +0300
On Sun, 09 Jun 2002 14:19:37 +0300 (EEST)
Yavor Ivanov <unitrans@xxxxxxx> wrote:
>
> zdr grupa.
> s edna programa se sblyskah koqto za da mi otvori edin file iska crc
> sum na tozi file tova e neshto kato B48505F6 tova tq go razkodirva
> kato BORISLAVVV oba4e tozi crc sum se izvli4a ot file imam edna
> programa koqto mi izvli4a crc32 no na men mi trqbva crc sum sblyskah
> se tezi dve neshta md5sum i sum no neznam kak da gi nakaram da mi
> izvli4at crc sum ot deden file. ako imate nqkakvi idei molq
CRC sum-a mozesh da napravish s 1001 polinoma ot sorta A1*X^n + A2*X^(n-1) + ... + An*X + A(n+1). Chesto pod CRC se razbira chistoto sumirane na byte-ove ili word(2 bytes). No kakva tochno suma polzvash trjabva da proverish. Zashtoto i MD5sum pravi sashtoto no izchisljava suma na MD5 kodirani word(2 byte) ot fajla. Experimentiraj.
mozesh da pusnesh md5sum taka :
md5sum filename
ili
md5sum -b filename
resultata mozesh da go zapishesh v file i da go proverish s :
md5sum -c res_filename
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--
Dimitar Peikov
Programmer Analyst
Globalization Group
"We Build e-Business"
RILA Solutions
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