Re: pgcrypto: PGP armor headers

On 09/29/2014 05:38 PM, Marko Tiikkaja wrote:
> On 9/29/14 3:02 PM, Heikki Linnakangas wrote:
>> Is there any real life examples or tools out there to generate armors
>> with headers with duplicate keys? RFC 4880 says:
>>
>>>      Note that some transport methods are sensitive to line length.  While
>>>      there is a limit of 76 characters for the Radix-64 data (Section
>>>      6.3), there is no limit to the length of Armor Headers.  Care should
>>>      be taken that the Armor Headers are short enough to survive
>>>      transport.  One way to do this is to repeat an Armor Header key
>>>      multiple times with different values for each so that no one line is
>>>      overly long.
>>
>> Does anyone do that in practice? Is there any precedence for
>> concatenating the values in other tools that read armor headers?
>
> Maybe I just suck at $SEARCH_ENGINE, but extracting armor headers
> programmatically doesn't seem to be very popular.  I could only find one
> example, which returned the last instance of the key.  But that seemed
> to be more an accident than anything else; it wasn't documented and the
> source code didn't say anything about it.  I also think that's the worst
> behaviour.  If we can't agree on concatenation, I'd rather see an error.

May I ask you why you wrote this patch? What are you doing with the headers?

- Heikki