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Youka/self-signed-certificate.md

Created November 30, 2024 02:24
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Description for self-signed-certificate creation & inspection.
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self-signed-certificate.md

Self signed certificate

Encrypted connections require a certificate + private key.
This little guide shows how to create & inspect those files.

Requirements

Encryption tool OpenSSL is all we need.

Creation

Run command:

openssl req -x509 -newkey rsa:2048 -days 36500 -subj /C=US/O=local/CN=localhost -nodes -out cert.crt -keyout cert.key

On Windows the subject gets rejected because of implicit path substitution -> escape by prepending /?=

New files cert.crt (=certificate) and cert.key (=private key) were created in current directory.

Inspection

Run command:

openssl x509 -noout -text -in cert.crt
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