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 17c2764d2e)
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 e365352d6a)
Add CMS_RecipientInfo_encrypt: this function encrypts an existing content
encryption key to match the key in the RecipientInfo structure: this is
useful if a new recpient is added to and existing enveloped data structure.
Add documentation.
(cherry picked from commit e1f1d28f34)
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)
