Use EVP API in more places #436
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Use EVP_PKEY_print_private() instead of the low-level API *_print() functions, such as RSA_print(). EVP_PKEY_print_*() family was added in OpenSSL 1.0.0. Note that it falls back to EVP_PKEY_print_public() and EVP_PKEY_print_params() as necessary. This is required for EVP_PKEY_DH type for which _private() fails if the private component is not set in the pkey object. Since the new API works in the same way for all key types, we now implement #to_text in the base class OpenSSL::PKey::PKey rather than in each subclass.
The low-level API that is used to implement #public_key is deprecated in OpenSSL 3.0. It is actually very simple to implement in another way, using existing methods only, in much shorter code. Let's do it. While we are at it, the documentation is updated to recommend against using #public_key. Now that OpenSSL::PKey::PKey implements public_to_der method, there is no real use case for #public_key in newly written Ruby programs.
Use EVP_PKEY_param_check() instead of DH_check() if available. Also, use EVP_PKEY_public_check() instead of EC_KEY_check_key(). EVP_PKEY_*check() is part of the EVP API and is meant to replace those low-level functions. They were added by OpenSSL 1.1.1. It is currently not provided by LibreSSL.
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ioquatix
approved these changes
Apr 16, 2021
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Use the EVP API in the following methods. This does not intend to introduce any incompatibilities in the Ruby interface.
This is part of #369.