openssl pkey -help

saolasosme

Public and private key management.

$ openssl pkey -help
Usage: pkey [options]
Valid options are:
 -help             Display this summary
 -inform format    Input format (DER or PEM)
 -outform PEM|DER  Output format (DER or PEM)
 -passin val       Input file pass phrase source
 -passout val      Output file pass phrase source
 -in val           Input key
 -out outfile      Output file
 -pubin            Read public key from input (default is private key)
 -pubout           Output public key, not private
 -text_pub         Only output public key components
 -text             Output in plaintext as well
 -noout            Don't output the key
 -*                Any supported cipher
 -traditional      Use traditional format for private keys
 -engine val       Use engine, possibly a hardware device
 -check            Check key consistency
 -pubcheck         Check public key consistency