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openssl genpkey

 
OpenSSL command to generate asymmetric key pairs. More information: https://www.openssl.org/docs/manmaster/man1/openssl-genpkey.html.
 
  • Generate an RSA private key of 2048 bits, saving it to a specific file:
     
    openssl genpkey -algorithm rsa -pkeyopt rsa_keygen_bits:{{2048}} -out {{filename.key}}
     
  • Generate an elliptic curve private key using the curve prime256v1, saving it to a specific file:
     
    openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:{{prime256v1}} -out {{filename.key}}
     
  • Generate an ED25519 elliptic curve private key, saving it to a specific file:
     
    openssl genpkey -algorithm {{ED25519}} -out {{filename.key}}

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