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openssl

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OpenSSL cryptographic toolkit. Some subcommands such as `req` have their own usage documentation.

Examples (8)

Generate a private key and encrypt the output file using AES256

openssl genpkey -algorithm rsa|ec -out private.key -aes256

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

openssl rsa -in private.key -pubout -out public.key

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

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

Convert certificate to `pem` or `der` format

openssl x509 -in certificate.crt -out certificate.pem|certificate.der -outform pem|der

Check certificate details

openssl x509 -in certificate.crt -text -noout

Generate a certificate signing request (CSR)

openssl req -new -key private.key -out request.csr

Display help

openssl help

Display version

openssl version