[openssl-users] RSA Key generation time
jb-openssl at wisemo.com
Tue Jan 17 16:08:57 UTC 2017
On 17/01/2017 07:44, Mithun P wrote:
> I have a embedded board P1010 RDB running openssl on VXWORKS 5.4 .
> I am generating RSA 2048 and 3072 bit key pairs.
> I am providing entropy to openssl by using RAND_seed from a HW RNG.
> My average generation time for RSA 2048 key pair is 2 Minutes and
> 3072 is 8 minutes.
> Is there a way to reduce the generation time?
I believe this is a CPU intensive operation (if VxWorks can do
this, try observing the CPU load during).
1. Check if the CPU specific bignum optimizations for your CPU
variant have been enabled via the libcrypto CPU detection code
(for example, there are optimizations for different ARM cortex
2. Faster CPU (expensive obviously).
3. Do the generation in the background before the keypair is
needed, at a time when the extra CPU load is less of a problem.
Jakob Bohm, CIO, Partner, WiseMo A/S. https://www.wisemo.com
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