[Cfrg] Error in the examples for draft-mcgrew-hash-sigs/

Jim Schaad <ietf@augustcellars.com> Wed, 06 March 2019 22:56 UTC

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From: Jim Schaad <ietf@augustcellars.com>
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Date: Wed, 6 Mar 2019 14:56:03 -0800
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Subject: [Cfrg] Error in the examples for draft-mcgrew-hash-sigs/
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I have been toiling away to get my implementation of this draft working.  In
the process of doing so, I ended up spending a certain amount of time trying
to figure out this problem.  If you attempt to generate the public key from
the private key seed given in the document, you will never be able to
succeed.  The problem is that the sample program from Cisco takes this key
and performs some transformations on it in order to generate the identifier
and the real seed for Appendix A.

The correct seed is
55 8B 89 66 C4 8A E9 CB 89 8B 42 3C 83 44 3A AE 
01 4A 72 F1 B1 AB 5C C8 5C F1 D8 92 90 3B 54 39