McDougall, Marshall (STEM) wrote: > Hi All. > > First post....be gentle :-} > > I have a RHEL server and I am having difficulty decrypting a pgp > encrypted file. Near as I can tell, I need the IDEA cipher. > > [EMAIL PROTECTED] gpg --decrypt myfile.txt > gpg: protection algorithm 1 (IDEA) is not supported > gpg: the IDEA cipher plugin is not present > gpg: please see http://www.gnupg.org/why-not-idea.html for more > information > gpg: encrypted with 1024-bit RSA key, ID C0A298D3, created 2004-07-13 > "one_of_my_keys" > gpg: public key decryption failed: unknown cipher algorithm > gpg: decryption failed: secret key not available > > I roamed around the GNUPG site and found the "idea.c.gz" downloads, but > the instructions allude to directories that don't exist on my server. > Has anyone added IDEA to an existing canned redhat installation? I am > open to any suggestion. Thanks.
You can rebuild the gnupg srpm and add idea. A few small changes to the spec file (like in the attached diff) should do what you want. A better solution would be to have sender encrypt the file to you using a cipher that you can use without any patents or other encumbrances. Does your key have a cipher pref for IDEA? If so, you should fix that so other people don't encrypt things to you that you can't easily decrypt. You can view your prefs with: $ gpg --edit-key C0A298D3 showpref quit -- Todd OpenPGP -> KeyID: 0xBEAF0CE3 | URL: www.pobox.com/~tmz/pgp ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I never met a morphosis I didn't like.
--- gnupg.spec~ 2007-03-01 07:47:37.000000000 -0500 +++ gnupg.spec 2008-01-23 14:40:16.000000000 -0500 @@ -1,12 +1,13 @@ Summary: A GNU utility for secure communication and data storage. Name: gnupg Version: 1.4.5 -Release: 13 +Release: 13.1 License: GPL Group: Applications/System Source0: ftp://ftp.gnupg.org/gcrypt/gnupg/gnupg-%{version}.tar.bz2 Source1: ftp://ftp.gnupg.org/gcrypt/gnupg/gnupg-%{version}.tar.bz2.sig Source2: gnupg-shm-coprocessing.expect +Source3: ftp://ftp.gnupg.dk/pub/contrib-dk/idea.c.gz Patch0: gnupg-1.4.1-gcc.patch Patch1: gnupg-1.4.2-curl.patch Patch2: gnupg-1.4.5-CVE-2006-6169.patch @@ -42,6 +43,7 @@ %patch4 -p0 -b .CVE-2006-6235 popd %patch5 -p2 -b .multiple-message +gunzip -c %{SOURCE3} > cipher/idea.c autoreconf %build @@ -109,6 +111,9 @@ %{_mandir}/man7/* %changelog +* Wed Jan 23 2008 Todd Zullinger <[EMAIL PROTECTED]> - 1.4.5-13.1 +- include the IDEA cipher + * Thu Mar 1 2007 Nalin Dahyabhai <[EMAIL PROTECTED]> - 1.4.5-13 - incorporate patch from Werner to work around clients which can't tell that multiple plain messages have been processed (#230457)
pgpR8n9YbbxWy.pgp
Description: PGP signature
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