The ossltest engine wraps the built-in implementation of aes128-cbc.
Normally in an engine the cipher_data structure is automatically allocated
by the EVP layer. However this relies on the engine specifying up front
the size of that cipher_data structure. In the case of ossltest this value
isn't available at compile time. This change makes the ossltest engine
allocate its own cipher_data structure instead of leaving it to the EVP
layer.
Reviewed-by: Andy Polyakov <appro@openssl.org>
This engine is for testing purposes only. It provides crippled crypto
implementations and therefore must not be used in any instance where
security is required.
This will be used by the forthcoming libssl test harness which will operate
as a man-in-the-middle proxy. The test harness will be able to modify
TLS packets and read their contents. By using this test engine packets are
not encrypted and MAC codes always verify.
Reviewed-by: Richard Levitte <levitte@openssl.org>
