Generate DER format RSA and ECC key for JWT CLI to generate JWT token

jwt-genkey.sh

openssl genpkey -algorithm EC \
    -pkeyopt ec_paramgen_curve:P-256 \
    -pkeyopt ec_param_enc:named_curve | \
  openssl pkcs8 -topk8 -nocrypt -outform der > jwt-ecc-private.p8 2>/dev/null && \
  
openssl pkey -pubout -inform der -outform pem \
    -in jwt-ecc-private.p8 \
    -out jwt-ecc-public.pem 2>/dev/null && \

openssl genpkey -algorithm RSA \
    -pkeyopt rsa_keygen_bits:2048 -outform der > jwt-rsa-private.p8 2>/dev/null && \
    
openssl pkey -pubout -inform der -outform pem \
    -in jwt-rsa-private.p8 \
    -out jwt-rsa-public.pem 2>/dev/null && \

echo -e 'Your RSA private key is \033[1;4mjwt-rsa-private.p8\033[0m and RSA public key is \033[1;4mjwt-rsa-public.pem\033[0m'
echo -e 'Your ECC private key is \033[1;4mjwt-ecc-private.p8\033[0m and ECC public key is \033[1;4mjwt-ecc-public.pem\033[0m'