Revert to old-style API for EC_KEY handling

Nothing using the EVP_PKEY correctly, so we should revert to the EC_KEY
and ECDSA interfaces. Unfortunately, the SSL client certificate library
uses EC_KEY directly, so just having the EVP_PKEY interface doesn't
work.

Remove the EVP_PKEY interface entirely because it just adds complexity
since the EC_KEY path will do the same thing.

(cherry picked from commit 47041552bd545846a1b7787823af4b5ca9e36dea)

Bug: 10655329
Change-Id: Ibf8c36780fe93284b88e91b7860baf1b951b4266
4 files changed
tree: 4819a43dc8e09c9690cd9c16af388b1d9ba961d9
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/