openssl notes

see

1. https://security.stackexchange.com/questions/106525/generate-csr-and-private-key-with-password-with-openssl
2. https://nodejs.org/api/http2.html

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eg .command lines:

1. generate pem ...

   openssl req -x509 -newkey rsa:2048 -nodes -sha256 -subj '/CN=localhost' -keyout localhost-prikey.pem -out localhost-cert.pem

2. generate .p12 file from .pem

   openssl pkcs12 -export -out example-cert.p12 -inkey localhost-prikey.pem -in localhost-cert.pem