Well, you can use opaque pointer and own structure containing a flag and switch between native and custom implementations depending on it.
I've tried it and it works
пн, 15 окт. 2018 г., 23:13 Selva Nair <selva.nair@xxxxxxxxx>:
--Hi,
How to override the evp_pkey_sign method in EVP_PKEY_METHOD structure for a specific key? This is to allow signing with PSS padding using Windows CNG API. Using rsa_priv_enc() we can only get pre-padded data when PSS is in use, but CNG does not seem to handle padding = none.
Also see issue 7341 on github https://github.com/openssl/openssl/issues/7341
I can use EVP_PKEY_meth_add0() to add a new method struct and that works. But that affect all keys. Is it possible to replace the evp_pkey_sign method on a specific key instance like one can do for RSA or EC methods?Thanks,Selva
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