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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: 2628
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Matthias Schertler
Date Reported: 2010-11-12
Verifier Name: Sean Turner
Date Verified: 2011-06-01

Section 5 says:

nonce (edata.Confounder, 8);
memcpy (edata.Data, data);
edata.Checksum = HMAC (K2, edata);

It should say:

nonce (edata.Confounder, 8);
memcpy (edata.Data, data);
edata.Checksum = HMAC (K2, concat(edata.Confounder, edata.Data));

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