GNUPG and PGP FreeWare 6.5.3

Fri, 11 Aug 2000 17:46:07 -0400

after hours of mental anguish (literally), I finally got it to work
thanks for your help

I got desperate.  I downloaded the source for GNUPG 1.0.2 (before I
installed via RPM), compiled it on my slow comp, and installed it.  I
went to OPTIONS in
PGPkeys in win95 and set it that the ONLY allowed algorithm is CAST5.  I
also added a few lines to my ~/.gnupg/options: 

cipher-algo CAST5
s2k-cipher-algo CAST5
s2k-digest-algo SHA1
compress-algo 1
disable-cipher-algo BLOWFISH
disable-cipher-algo TWOFISH
disable-cipher-algo 3DES
disable-pubkey-algo ELG

i prolly disabled something i shouldn't, but.... it works :)
This OPTIONS file would support the following algo's:   (accessed by
hitting 'gpg --version')
Home: ~/.gnupg
Supported algorithms:
Cipher: CAST5
Pubkey: ELG-E, DSA
Hash: MD5, SHA1, RIPEMD160

I went over to GPG and created new keys *with* a good password. 
Exported it ('gpg --armor
--output key4pgp --no-comment --export-secret-key') and imported it into PGP with no problems.  
also, you can't have the line "force-v3-sigs" commented because then PGP
in win95 says it's a bad signature (question: why??).
now I can encrypt and sign any file in PGP in win95 and de-crypt it in
GPG, and vice-versa. :)
just one question though: when i imported the GPG keys into PGP, it said
(and still says) that the cipher is IDEA, but i can't be because my GPG
doesn't even recognize IDEA.  is PGP wrong?
Oliver, about your RSA question: I don't think so.  the only difference
I could think of would be if you *created* the secret key using the RSA

Oliver Bode wrote:

> > Hello.
> > I am having the most trouble using these two together (GNUPG in Linux
> > and PGP 6.5.3 on Win95). I have read countless posts and messages on
> > this, and none have given me a complete answer. Reading that GNUPG has
> > some security enhancements over PGP, I decided to create my keys with it
> > using Option 1 and 1536 bit encryption. Everything worked fine (in
> > Linux): encrypting, decrypting, signing, etc.
> > I exported my public and private keys (gpg --export-secret-key --output
> > keys.gpg and tried to import them into PGP
> > 6.5.3. PGP said it was corrupted. If I use the tag '--export' instead
> > of '--export-secret-key', it imports fine but I don't have the secret
> > key in PGP. So.... I deleted the GNUPG keys and created a pair in PGP
> > with CAST5 encryption (DH/DSS 1536), knowing beforehand GNUPG needed
> > this kind of encryption. I exported it with 6.0 extensions and with the
> > private key. Importing them into GNUPG was a piece of cake and works
> > great (I can encrypt files in GNUPG and de-crypt them in PGP... and
> > vice-versa).
> > This leads back to my original problem. Is it possible to take
> > advantage of GNUPG security enhancements and still use those keys in PGP
> > in win95?
> > Thanks before hand to anyone able or willing to help.
> I was successfully able to do the following last night: First create keys in
> gpg leave the password option empty. Then export the secret key using the
> following:
> gpg --export-secret-keys --no-comment -a foo >foo.asc
> Then open foo.asc in Windows PGP6.5.1 and change the password - this works.
> >From here I have two choices in making the keys compatible: work out how to
> change the password in GPG or import the PGP key pair back into GPG.
> I was wondering if anyone knows if the RSA module in GPG will make any
> difference to the exporting of secret keys?
> Thanks, Oliver
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