PR: 3004

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.

It also ensures that valgring is happy.

(cherry picked from commit 529d27ea472fc2c7ba9190a15a58cb84012d4ec6)

Address CBC decrypt timing issues and reenable the AESNI+SHA1 stitch.
(cherry picked from commit 125093b59f3c2a2d33785b5563d929d0472f1721)

This patch makes the decoding of SSLv3 and TLS CBC records constant
time. Without this, a timing side-channel can be used to build a padding
oracle and mount Vaudenay's attack.

This patch also disables the stitched AESNI+SHA mode pending a similar
fix to that code.

In order to be easy to backport, this change is implemented in ssl/,
rather than as a generic AEAD mode. In the future this should be changed
around so that HMAC isn't in ssl/, but crypto/ as FIPS expects.
(cherry picked from commit e130841bccfc0bb9da254dc84e23bc6a1c78a64e)

This change adds CRYPTO_memcmp, which compares two vectors of bytes in
an amount of time that's independent of their contents. It also changes
several MAC compares in the code to use this over the standard memcmp,
which may leak information about the size of a matching prefix.
(cherry picked from commit 2ee798880a246d648ecddadc5b91367bee4a5d98)

PR: 2963 and a number of others

PR: 2963 and a number of others

Submitted by: Pierre Delaage

definitions from e_os.h

the trust store.

revert OCSP_basic_verify changes: they aren't needed now we support partial chain verification and can pass verify options to ocsp utility

The modification to the OCSP helper purpose breaks normal OCSP verification.
It is no longer needed now we can trust partial chains.

trusted store instead of the default which is to return an error if
we can't build the complete chain.