On Tue, 2021-09-14 at 11:11 -0400, Ken Goldman wrote: > Conceptually, how are these different? > > When do I use one vs the other? The EVP_PKEY is an object holding data (well, rather a reference, but that is fairly irrelevant) of a private key, public key, or domain parameters for asymetric crypto keys. The EVP_PKEY_CTX is an operation context - that is a context to make some operations with an EVP_PKEY such as signing/verification, encryption/decryption, key generation (starting with domain parameters EVP_PKEY), key checking. > Where would I learn this? I suppose in the manual pages - I'd start with EVP_PKEY_new and EVP_PKEY_CTX_new man pages. Yeah, the discoverability is not that good I suppose. And there is no good high level overview. -- Tomáš Mráz No matter how far down the wrong road you've gone, turn back. Turkish proverb [You'll know whether the road is wrong if you carefully listen to your conscience.]
