pkey: disallow {DH,DSA,EC,RSA}.new without arguments on OpenSSL 3.0 #848
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Introduce a useful macro to avoid scattering *_PREREQ() checks everywhere. Currently, the macro is defined for OpenSSL 3.0 or later only. I think it is possible that LibreSSL may adopt it in the future.
When OpenSSL::PKey::{DH,DSA,EC,RSA}.new is called without any arguments,
it sets up an empty corresponding low-level struct and wraps it in an
EVP_PKEY. This form has been supported so that users can fill the fields
later using low-level setter methods such as OpenSSL::PKey::RSA#set_key.
Such setter methods are not compatible with OpenSSL 3.0 or later, where
pkeys are immutable once created. This means that the ability to create
an empty instance is useless. Let's remove it and raise ArgumentError if
attempted.
rhenium
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When
OpenSSL::PKey::{DH,DSA,EC,RSA}.newis called without any arguments, it sets up an empty corresponding low-level struct and wraps it in anEVP_PKEY. This form has been supported so that users can fill the fields later using low-level setter methods such asOpenSSL::PKey::RSA#set_key.Such setter methods are not compatible with OpenSSL 3.0 or later, where pkeys are immutable once created. This means that the ability to create an empty instance is useless. Let's remove it and raise
ArgumentErrorif attempted.Related:
OpenSSL::PKey::DSA.new.to_s#845