On Mon, Jun 19, 2000 at 04:00:11PM -0700, Christopher McCrory wrote:
> So my question is: Is there a easy algorithm to check the crypt type
> based to something simple? length? initial characters?
>
> my current (des ?) crypt strings are 13 characters
> newer machine (MD5 ?) crypt strings are 35 characters and start with $1$
> others for *BSD and Solaris ?
> is this enough to distinguish them?
. 13 char long (first é char are the salt), only [A-Za-z0-9./] : DES
everywhere except under slackware 7 (default no DES package) and FreeBSD
. "$1$" + 2 to 8 char (salt) + "$" + 22 char : MD5
FreeBSD, OpenBSD, any Linux (libc5 and glibc2), and some others
. "$2a$" + 2 digits + "$" + 53 char (first 128 bits are the salt)
only under OpenBSD
you may look at the sources of:
. titi <http://groar.sourceforge.net/> (you need openssl or openbsd)
. john the ripper <http://www.openwall.com/john/>
other DES variants exist but are essentially proprietary
Denis Ducamp.
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