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From Brian Candler <>
Subject Re: JavaScript bcrypt (was Re: authentication cleanup)
Date Sun, 07 Feb 2010 18:45:17 GMT
On Sun, Feb 07, 2010 at 10:23:17AM -0800, Chris Anderson wrote:
> > password: "plain"
> > password: "{CRYPT}$1$foo$bar"
> > password: "{SHA1}..."
> > password: "{SSHA1}...with salt..."
> > ... etc
> >
> That doesn't sound bad at all.
> If we can't find an Erlang library, is there a spec we should look at
> while implementing?

Yep, it's here:

Scroll down to section 14.4. Well actually it's not a full spec as it
doesn't show how the salt and value are separated in SSHA1, but you can get
that from the source.

Note that the {CRYPT} format is a unix crypt, which is itself an extensible
format; $2$...  is what openbsd are using for bcrypt.

So actually you could just use that format. The OpenLDAP format would allow
you to support existing salted SHA1 passwords in the same field.


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