Werner Koch wrote:
Well for the OpenPGP card you don't need any filesystem as we onjly use the get/put data commands. Thus a simple offset,length table is what you need. Well, you know that of course.
Yeah, I know that very well :) It took me a bit of time to correctly implement the coding/decoding of composite objects, but this stuff is now fully working.
Why I didn't finish the development - because I've found some discrepancies between the GPG code, OpenPGP card spec and the PKCS#1Care to elaborate on this?
Uff, I would have to look it up to be exact. It has to do with PKCS#1 padding block types. For example, in my signing function I'm not using the Java Signature class (which produces one kind of PKCS#1 block type) but the Cipher class and encrypt method (which produces another kind of PKCS#1 block type) AFAIR, I've lost quite a bit of time on figuring out what was wrong (reading the specs, everything should have fit perfectly) and in the moment of despair I've just changed it to use encrpytion with the private key instead of signature. Before the change GPG complained about invalid signature, but after, the thing magically worked! It may have to do with Sun's cref emulation but nevertheless.. >
I am still interested to have reference implementation for java card although I can't help very much with the implementation but I know all
thanks, but I don't need any help with the implementation. if I just bit the bullet I believe I could finish it up in a week to be completely functional. I'm having more of a logistic trouble: - I should buy the JCOP development toolkit (ok, that's no problem) - buy from somewhere else a smart-card reader (also shouldn't be a problem) - install Java, which is not trivial on FreeBSD. installing linux on my laptop is not really an option (too much data to move around). hmph, maybe a boot CD+10GB ext2 "disk file" on FAT32 for the linux :) - install Eclipse 3 (since the JCOP toolkit is an Eclipse plugin) - learn to use Eclipse - patch (again! - I've done it so it can talk to cref, but I don't think I've brought the patch with me when I moved :/ ) GPG somehow to talk to the emulated smart-card so I can test the applet without actually downloading it to the card until it's finally finished - and FINALLY, make the applet fully-functional I think that all of the above work exceeds the effort needed to finish the applet :( I'm extremly lazy to do all of the above grunt-work and if I start now, maybe I'll get it finished in 6 months :) then I can start working on the applet :)
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Description: OpenPGP digital signature
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