openssl@3

Cryptography and SSL/TLS toolkit for secure communications

brewmacoslinux

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Cryptography and SSL/TLS Toolkit

openssl

Generate a self-signed SSL certificate$ openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes

Check SSL certificate expiration date$ openssl x509 -in cert.pem -noout -dates

Create a SHA256 hash of a file$ openssl dgst -sha256 filename