Add hooks to support key agreement recipient info type (KARI) using
algorithm specific code in the relevant public key ASN1 method.
(cherry picked from commit 17c2764d2e6fc5a010ad3c12662068689ed2ad17)
Add support for customisation of CMS handling of signed and enveloped
data from custom public key parameters.
This will provide support for RSA-PSS and RSA-OAEP but could also be
applied to other algorithms.
(cherry picked from commit e365352d6a6368039392fed14a328f8c0bf955c3)
continue with symmetric decryption process to avoid leaking timing
information to an attacker.
Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
this issue. (CVE-2012-0884)