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Adding IDEA encryption algorithm
================================

Due to patent problems, we don't release binaries of gpg with the IDEA
cipher installed.  If you are legally permitted to use IDEA (you live in a
country where IDEA is not patented or you have purchased rights to use
IDEA), you may use this method to install IDEA into GnuPG.

Pre-requisite: Apple Developer Tools and Admin access

1) First, you must download the source for GnuPG and know how to install it
   (but you don't need to have it installed yet).  See HOWOT-build-gpg-osx.


2) You need to download the source code for IDEA:

curl -O ftp://ftp.gnupg.dk/pub/contrib-dk/idea.c.gz
curl -O ftp://ftp.gnupg.dk/pub/contrib-dk/idea.c.gz.sig
gpg --verify idea.c.gz.sig
gunzip idea.c.gz


3) Now you compile IDEA into GnuPG:

Before running ./configure when building GnuPG, copy idea.c into cipher, as
such:

cp idea.c /path/to/gnupg-x.x.x/cipher

Where /path/to is the path to the fold the GnuPG source folder is in and
x.x.x is the version number of GnuPG you're trying to compile.

Now run configure again and return to howto-build-gpg-osx.


4) You can check that IDEA is working after you install GnuPG:

gpg --version

================================
version 1.4.1
Written by Stephane Corthesy
Edited by Gordon Worley
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