These can be re-generated via:
cd test/certs; ./setup.sh
if need be. The keys are all RSA 2048-bit keys, but it is possible
to change that via environment variables.
cd test/certs
rm -f *-key.pem *-key2.pem
OPENSSL_KEYALG=rsa OPENSSL_KEYBITS=3072 ./setup.sh
cd test/certs
rm -f *-key.pem *-key2.pem
OPENSSL_KEYALG=ecdsa OPENSSL_KEYBITS=secp384r1 ./setup.sh
...
Keys are re-used if already present, so the environment variables
are only used when generating any keys that are missing. Hence
the "rm -f"
Reviewed-by: Richard Levitte <levitte@openssl.org>