Hello, I'd like that my callback is called when a sign/verify is being requested by *EVP_DigestSignFinal()* function. I've tried add a EVP_PKEY_METHOD to app_methods stack, that works good however doesnt fit on my solution.
I noticed that creating an engine and set pkey methods there, it could solve it. I looked at gost engine to have in mind what I should do. So, in engine I call *ENGINE_set_pkey_meths()*, so far so good. The issue occurs when I try to assign a RSA key. I call *EVP_PKEY_assign(*outKey, NID_sha1WithRSAEncryption, key);*. The error returned is *pkey_set_type:unsupported algorithm*. Most probably I'm missing something. If *EVP_PKEY_assign()*worked I will call *EVP_DigestSignInit(ctx, NULL, sha1(), engine, pkey)*. Thanks in advance.
