Are ZLIB and ZLIB2 no longer supported in GnuPG?

[Werner Koch]

On Fri, 26 Feb 2016 20:23, anthony at cajuntechie.org said:

> options in my .conf file. Specifically, it told me that ZLIB and ZLIB2
> weren't supported as compression algos.

You need to install a zlib development package before building GnuPG so
that it can add support for this.  You may also want to add bzlib2
support.

On Debian based system:  apt-get install zlib1g-dev  libbz2-dev

> compile flag that I didn't pass it? If they aren't supported, are there
> any security or usability implications to only using ZIP for compression?

As with most compression algorithms you are subject to DoS because it is
possible to create very small compressed file which will expand into a
huge output.  (Use --max-output to mitigate such attacks.)


Shalom-Salam,

   Werner

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