Hello,

I'm looking into the OpenSSL engine support which was introduced in OpenSSL version 0.9.6 (or 0.9.7). Is there an official "engine" specification or HOWTO available? The only document I have found so far is [1]. As a first start I have looked into the GMP engine module. If I understand the engine concept correctly I can only use the following functions and methods within an engine:

- RSA
- DSA
- ECDH
- ECDSA
- DH
- RAND

Can I implement block ciphers (e.g. DES, etc.) in an engine module or is this not supported (by the API implementation) at the moment.

I'm quite new in this area and apologize if this questions makes no sense or was already answered on the openssl-dev mailing-list.

[1]: http://www.openssl.org/docs/crypto/engine.html

Regards,
        Heiko
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