rsa_exptmod(), ran on the private key, makes use of CRT optimization
parameters. In some use-cases, the given key does not include the
optimization parameters.
This patch allows rsa_exptmod() to run without the CRT parameters,
using directly mp_exptmod().
Signed-off-by: Pascal Brand <pascal.brand@st.com>
There could have been a 'goto error', which misses the free of rnd and
rndi even if they were initialized.
This could happen in cases where a private key operation was done and
afterwards one of the operations like reading back or conversion, would
have failed (which is likely not to happen)
This also includes a proposed improvement from the OLPC project to free
elements in the reverse order as they were allocated.
