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Re: arcfour-hmac checksum salt value
On Fri, Mar 14, 2008 at 1:03 PM, Love Hörnquist Åstrand <firstname.lastname@example.org> wrote:
> >>> While implementing arcfour-hmac for Linux Kernel NFS use, I have run
> >>> into the following issue:
> >> From where do you get 13 in heimdal ?
> >> From what I can read, heimdal uses KRB5_KU_USAGE_SIGN that later in
> >> the crypto layer is mapped to 15 for the mic checksum.
> > Function usage2arcfour() when given KRB5_KU_USAGE_SEAL.
> > _gsskrb5_wrap()
> > --> _gssapi_wrap_arcfour()
> > --> arcfour_mic_cksum()
> > --> krb5_create_checksum()
> > --> usage2arcfour()
> > I was only looking at your code (and testing my code against Solaris).
> > Let me know if I'm misreading this...
> Ah, confused wrap with mic. if you look at older drafts they uses 13
> for wrap . 15 must be a copy and paste error.
>  http://tools.ietf.org/html/draft-brezak-win2k-krb-rc4-hmac-02
Thanks! It makes more sense now. I will submit an errata report for rfc4757.