Decryption problem

Johan Wevers
Tue, 14 Sep 1999 23:16:18 +0200 (MET DST)

Werner Koch wrote:

> Well, you know that this is patented - hope you are only doing this
> for research.
No, for real (non-commercial) use. And I don't care that is is patented. I use IDEA (and RSA, but I'm outside the US) with 2.x anyway.
> > load-extension skipjack
> DONT USE THIS CIPHER - I simply wrote it to see how fast I can
> implement a new cipher.,
I'm not using it for encryption, but I reasoned that it wouldn't hurt to be able to decrypt messages encrypted with Skipjack.
They also released SHA-1...
> and is not OpenPGP compliant.
In what way? That is not one of the prescribed algorithms? BTW, I'm trying to make an RC5 module myself to see if I really understand the code. I'm only confused what to do with the fact that my RC5 example code gets pointers to 32 bits quantities and the gpg code needs byte*'s, but I guess this subject is more approprriate for the developer list.
> > vulcan:~/tmp> gpg --rfc1991 --s2k-digest-algo MD5 --digest-algo MD5
> > --cipher-algo IDEA --s2k-cipher-algo IDEA -u johanw filename
> Add a "-e" to encrypt and "-r" for the recipient of the message
Thanks. Now pgp 2.6.3i is able to decrypt the message. With the options file settings I have the -r and -e options where the only ones required. 2.x compatibility is required since some of my correspondents use 2.x versions and I don't want to force them to upgrade. However I consider changing to a pgp 5 compatible key because the MD5 algorithm is not really considered safe anymore. Being compatible when just using conventional encryption would be nice, but I'll keep a pgp 2 binary around. -- ir. J.C.A. Wevers // Physics and science fiction site: // Finger for my PGP public key. PGP-KeyID: 0xD42F80B1