We need to choose between two signature schemes:

* RSA/SHA2 S-MIME signatures
* ECDSA/SHA2 S-MIME signatures

For that our python software needs to support one of this scheme. Currently for some political reasons the ECDSA solution is prefered.

Is the ECDSA solution supported by any of the python crypto modules (M2Crypto, ...) and do you have an example for that ?

The ECDSA support seems very young even for openssl.

Thanks in advance