certGen.sh

#!/bin/bash

echo "----------------------------------------------"
echo "          Generate Self Signed Cert"
echo "----------------------------------------------"

name="clientCert"

echo "Generating certificate $name.crt"
openssl req -x509 -newkey rsa:4096 -sha256 -days 2190 -nodes -keyout $name.key -out $name.crt -subj "/CN=$name"

echo "Creating $name.pfx"
openssl pkcs12 -export -in $name.crt -inkey $name.key -out $name.pfx

echo "Creating $name.json"
base64Thumbprint=$(sha256sum $name.crt)
keyid=$(uuidgen)
base64Value=$(base64 "$name.crt")
printf '{"customKeyIdentifier": "%s", "keyId": "%s", "type": "AsymmetricX509Cert", "usage": "Verify", "value": "%s"}' "$base64Thumbprint" "$keyid" "$base64Value" > $name.json