RSA-PSS - Backwards compatability - EVP_PKEY_get0_RSA

[Pedro Lopes]

Hello,

I'm assigning the RSA key as EVP_PKEY_RSA_PSS:
RSA* key;
EVP_PKEY_assign(*outKey, EVP_PKEY_RSA_PSS, key);

As is known EVP_PKEY_get0_RSA was recently updated to also accepts
EVP_PKEY_RSA_PSS and return the rsa value.

I'd like to know if there is any workaround to get the RSA key (RSA-PSS) .
I have to support openssl 1.0.1h and 1.1.1b.

-- 
Best regards,
Pedro Lopes
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