Key expires at ... 1971

[David Shaw]

On Wed, Jun 04, 2008 at 07:39:37PM +0200, Daniel Leidert wrote:
> Hi,
> 
> Is this a feature or a bug or a limitation or maybe even not gnupg
> related? A user observed the following:
> 
> > gpg --gen-key
> [..]
> > ???Please select what kind of key you want:
> >    (1) DSA and Elgamal (default)
> >    (2) DSA (sign only)
> >    (5) RSA (sign only)
> > Your selection? 
> > DSA keypair will have 1024 bits.
> > ELG-E keys may be between 1024 and 4096 bits long.
> > What keysize do you want? (2048) 
> > Requested keysize is 2048 bits
> > Please specify how long the key should be valid.
> >          0 = key does not expire
> >       <n>  = key expires in n days
> >       <n>w = key expires in n weeks
> >       <n>m = key expires in n months
> >       <n>y = key expires in n years
> > Key is valid for? (0) 99y
> > Key expires at Mo 05 Apr 1971 08:39:47 CET
> > Is this correct? (y/N)
> 
> I can reproduce it with the latest release of gnupg 1.4.9.

It's a bug.  OpenPGP has some date limits (there is a Y2106 issue
inherent in the protocol), but it should be able to handle expiration
dates up to 2242.  I'll take a look at it.

David