Missing OID mapping for ecdsa-with-SHA512 (hex 300a06082a8648ce3d040304) — causes "Unknow Hash Algorithm OID"

[mario-ca]

When cloning a certificate signed with ecdsa-with-SHA512, the script fails with the following error:

Unknow Hash Algorithm OID: 300a06082a8648ce3d040304

Steps to reproduce

1. Obtain or generate an X.509 certificate with Signature Algorithm: ecdsa-with-SHA512.
2. Run: ./clone-cert.sh path/to/cert.pem
3. Observe the error output.

Expected behavior

The script should correctly detect the hash algorithm (SHA512) and proceed with the cloning process.

Actual behavior

The script exits with:
Unknow Hash Algorithm OID: 300a06082a8648ce3d040304

Root cause

The function oid() in clone-cert.sh does not include a mapping for the OID representing ecdsa-with-SHA512.

Proposed fix

Add the missing mapping in the oid() function:

"300a06082a8648ce3d040304") echo sha512
;;#ecdsa-with-SHA512