Some useful OpenSSL command

Notice

I wrote this article and was originally published on Qiita on 4 March 2023.

OpenSSL is a swiss army knife of cryptography.

# show option of enc command
$ openssl enc help
Usage: enc [options]
Valid options are:
 -help               Display this summary
 -list               List ciphers
 -ciphers            Alias for -list
 -in infile          Input file
 -out outfile        Output file
 -pass val           Passphrase source
 -e                  Encrypt
 -d                  Decrypt
 -p                  Print the iv/key
 -P                  Print the iv/key and exit
 -v                  Verbose output …

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