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RFC 4757, "The RC4-HMAC Kerberos Encryption Types Used by Microsoft Windows", December 2006

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: sec

Errata ID: 1648
Status: Rejected
Type: Technical
Publication Format(s) : TEXT

Reported By: Ganga Mahesh Siddem
Date Reported: 2008-12-31
Rejected by: Sean Turner
Date Rejected: 2011-06-28

Section 7.3 says:

Kcrypt = HMAC(Klocal, "fortybits", (int32)0);
// len includes terminating null

Kseq = HMAC(Kss, "fortybits", (int32)0);
// len includes terminating null

It should say:

Kcrypt = HMAC(Klocal,(int32)0, "fortybits");
// len includes terminating null

Kseq = HMAC(Kss, (int32)0,"fortybits");
// len includes terminating null

Notes:

Larry Zhu confirmed this issue.Misordered arguments in HMAC function.
--VERIFIER NOTES--
I checked with Magnus Nystrom. He said their implementation is equal to the RFC.

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