Command-line tool

openssl@4

brew/openssl@4

Checked 25 Oct 2026, 21:09 UTC · Listing refreshed from Homebrew, winget, npm, Scoop and cargo; npm packages checked against OSV.dev

Cryptography and SSL/TLS Toolkit

Website

At a glance

Type

Command-line tool

Install on

Windows, macOS, Linux

Last checked

25 Oct 2026, 21:09 UTC

Install it

Windows

winget install --id ShiningLight.OpenSSL.Dev -e

macOS

brew install openssl@4

Linux

brew install openssl@4

Generate a private key and encrypt the output file using AES-256

openssl genpkey -algorithm rsa -out path/to/private.key -aes256

Generate the corresponding public key from the private key `private.key` using `rsa`

openssl rsa -in path/to/private.key -pubout -out path/to/public.key

Generate a self-signed certificate valid for a specified number of days (365)

openssl req -new -x509 -key path/to/private.key -out path/to/certificate.crt -days 365

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