[Tickets #15043] Public Key Expiration Date is not calculated correctly

[noreply at bugs.horde.org]

DO NOT REPLY TO THIS MESSAGE. THIS EMAIL ADDRESS IS NOT MONITORED.

Ticket URL: https://bugs.horde.org/ticket/15043
------------------------------------------------------------------------------
  Ticket             | 15043
  Created By         | horde at immerda.ch
  Summary            | Public Key Expiration Date is not calculated correctly
  Queue              | IMP
  Version            | 6.2.27
  Type               | Bug
  State              | Unconfirmed
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
------------------------------------------------------------------------------


horde at immerda.ch (2020-11-12 13:08) wrote:

Importing the following key:

$ cat /tmp/foo
-----BEGIN PGP PUBLIC KEY BLOCK-----
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=07yf
-----END PGP PUBLIC KEY BLOCK-----

Gives you the following output under details:

Name:                           Jan Jirat
Schlüsseltyp:                   Öffentlicher Schlüssel
Schlüsselerzeugung:             10/02/17
Verfallsdatum:                  10/04/24
Schlüssellänge:                 2048 Bytes
Kommentar:                      [Keine]
E-Mail-Adresse:                 jjirat at woz.ch
Hash-Algorithmus:               pgp-sha512
Schlüssel-Id:                   0x0A0F2DDA
Fingerabdruck des Schlüssels:   D3D44423F5E33237B497B21D7414FC830A0F2DDA

However the expiration date (Verfallsdatum) is wrong:

$ gpg /tmp/foo
pub   rsa2048/0x7414FC830A0F2DDA 2013-10-01 [SCEA] [expired: 2020-10-01]
       Key fingerprint = D3D4 4423 F5E3 3237 B497  B21D 7414 FC83 0A0F 2DDA
uid                             Jan Jirat <jjirat at woz.ch>
sub   rsa2048/0x9B5952528F267293 2013-10-01 [SEA] [expired: 2017-10-01]

The key is clearly expired, although there are 2 different sigs  
expired at two different set of times. Still nothing makes sense about  
year 2024

Platform: PHP 7.3 / gpg (GnuPG) 2.0.22 / CentOS 7