On Aug 12, 2008, at 5:16 AM, Lorenz, Michael wrote:
Hello GNU-PG users,
I have a question regarding the export of a private key.
I want to transfer the key-pair of a GPG installation to a Java
program (using for example the GNU-Crypto library). Since there is a
very large amount of encrypted records I want to avoid to create a
big convert-process that decrypts with GPG and encrypts again with
Java.
As GNU-Crypto supports "ElGamal" I thought it would be possible to
export the private key as bytes and use this information in Java to
decrypt the data. But I have difficulties doing this.
You could probably work through this and get it to work, but it's not
going to be easy. For one, OpenPGP uses a somewhat strange cipher
mode (a variant on CFB). You'd also have to deal with the OpenPGP
encoding on the packets.
Rather than do all that, take a look at http://www.bouncycastle.org/
They have a Java library that can do OpenPGP directly.
David
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