Fix usage of custom EVP_CIPHER objects
If a custom EVP_CIPHER object has been passed to EVP_CipherInit() then it
should be used in preference to a fetched cipher.
We also fix a possible NULL pointer deref in the same code for digests.
If the custom cipher passed to EVP_CipherInit() happens to use NID_undef
(which should be a discouraged practice), then in the previous
implementation this could result in the NULL cipher being fetched and
hence NULL encryption being unexpectedly used.
CVE-2022-3358
Fixes #18970
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19300)
(cherry picked from commit
25d47cccf203c3b71171e78865e48ea061a039a8)