RFC 4880, "OpenPGP Message Format", November 2007

Note: This RFC has been updated by RFC 5581

Errata ID: 7970
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Daniel Huigens
Date Reported: 2024-06-04

Section 13.1.3 says:

     2. Using the list in Section 5.2.2, produce an ASN.1 DER value for
        the hash function used.  Let T be the full hash prefix from
        Section 5.2.2, and let tLen be the length in octets of T.

It should say:

     2. Using the list in Section 5.2.2, produce an ASN.1 DER value for
        the hash function used and the hash digest.  Let T be the full
        hash prefix from Section 5.2.2, concatenated with the hash
        digest H, and let tLen be the length in octets of T.

Notes:

This section is an informational (non-normative) copy of section 9.2 of RFC 3447.
However, it mistakenly omits the hash digest from the value T, and thus unintentionally diverges from RFC 3447.
Technically speaking, this does not affect the rest of RFC 4880 as its other sections refer to RFC 3447 rather than this section, but it is nevertheless incorrect and potentially confusing.
All implementations implement it correctly, however, so accepting this erratum should not lead to any changes in implementations.

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