Usage: pyrsa-decrypt [options] private_key

Decrypts a file. The original file must be shorter than the key length in order to have been
encrypted.

Options:
  -h, --help            show this help message and exit
  -i INPUT, --input=INPUT
                        Name of the file to decrypt. Reads from stdin if not specified.
  -o OUTPUT, --output=OUTPUT
                        Name of the file to write the decrypted file to. Written to stdout if this
                        option is not present.
  --keyform=KEYFORM     Key format of the private key - default PEM