nctions EVP_PKEY_missing_parameters() and EVP_PKEY_copy_parameters() is to handle public keys in certificates where the parameters are sometimes omitted from a public key if they are inherited from the CA that signed it.</p>

<p>The deprecated functions EVP_PKEY_cmp() and EVP_PKEY_cmp_parameters() differ in their return values compared to other _cmp() functions. They are aliases for EVP_PKEY_eq() and EVP_PKEY_parameters_eq().</p>

<p>The function EVP_PKEY_cmp() previously only checked the key parameters (if