gpgsplit
Split OpenPGP messages into smaller parts
SYNOPSIS
gpgsplit [options] [file]
PARAMETERS
--create-empty
Create the first chunk even if it would be empty.
--force
Overwrite existing files.
--ignore-garbage
Ignore garbage at the beginning of the input file.
--max-size=
Set the maximum size of each chunk to
--output=
Set the output file name prefix to
--suffix-format=
Set the format of the suffix appended to the output file name prefix to
--verbose
Enable verbose output.
--version
Display version information and exit.
--help
Display a help message and exit.
DESCRIPTION
gpgsplit is a command-line utility designed to split large OpenPGP messages or files into smaller, manageable parts. This is particularly useful when dealing with email systems or other applications that have limitations on the maximum size of attachments or messages.
The command operates by dividing the input file into chunks, each of which contains a complete OpenPGP packet. The default size of each chunk is controlled by parameters, balancing the need for small parts against the overhead of having a large number of files.
The generated parts can then be processed individually or reassembled using gpg --concatenate. gpgsplit provides flexibility in managing large OpenPGP data, ensuring compatibility with systems that might not be able to handle large files directly. It is an essential tool for handling encrypted data in constrained environments.
EXAMPLE
To split a file named 'message.gpg' into smaller parts, using a maximum chunk size of 1MB and an output prefix of 'part-', you would use the following command:
gpgsplit --max-size=1M --output=part- message.gpg
This will generate files named part-000, part-001, part-002, etc., each containing a chunk of the original 'message.gpg' file.
REASSEMBLING
The parts created by gpgsplit can be easily reassembled using gpg --concatenate. For example:
gpg --concatenate part-* > original.gpg
will recreate the original message.
