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RFC 2246, "The TLS Protocol Version 1.0", January 1999

Note: This RFC has been obsoleted by RFC 4346

Source of RFC: tls (sec)

Errata ID: 3481
Status: Rejected
Type: Technical
Publication Format(s) : TEXT

Reported By: Martin Rex
Date Reported: 2013-02-08
Rejected by: Stephen Farrell
Date Rejected: 2014-05-08

Section 8.1.2 says:

8.1.2. Diffie-Hellman

   A conventional Diffie-Hellman computation is performed. The
   negotiated key (Z) is used as the pre_master_secret, and is converted
   into the master_secret, as specified above.

It should say:

8.1.2. Diffie-Hellman

   A conventional Diffie-Hellman computation is performed.  The
   negotiated key (Z) is used as the pre_master_secret, and is converted
   into the master_secret, as specified above.  Leading bytes of Z that
   contain all zero bits are stripped before it is used as the
   pre_master_secret.

Notes:

Adopting the clarification from rfc4346 Section 8.1.2. Not stripping the leading zero bits of Z will cause interop problems (handshake failures) with the installed base. Rfc2246 is still the authoritative spec for TLSv1.0. One can not implement TLSv1.0 from rfc4346.
--VERIFIER NOTES--
We don't post errata for things fixed when an RFC is obsoleted.

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