Ubuntu Manpage: RNP - OpenPGP-compatible signatures and encryption.

NAME

       RNP - OpenPGP-compatible signatures and encryption.

SYNOPSIS

       rnp [--homedir dir] [OPTIONS] COMMAND [INPUT_FILE, ...] ...

DESCRIPTION

       The rnp command-line utility is part of the RNP suite and provides OpenPGP signing and
       encryption functionality compliant with IETF RFC 4880.

       rnp does not allow manipulation of keys or keyrings — please use rnpkeys(1) for that
       purpose.

   BASICS
       By default, rnp will apply a COMMAND, additionally configured with OPTIONS, to all
       INPUT_FILE(s) or stdin if no INPUT_FILE is given. There are some special cases for
       INPUT_FILE :

       •   - (dash) substitutes to stdin

       •   env:VARIABLE_NAME substitutes to the contents of environment variable VARIABLE_NAME

       Depending on the input, output may be written:

       •   if --output option is given output is written to the path specified (or to the stdout
           if - is used)

       •   to the INPUT_FILE with a removed or added file extension (.pgp, .gpg, .asc, .sig),
           depending on operation.

       •   to the stdout if input was read from the stdin.

       If output file already exists, it will not be overwritten, unless --overwrite option is
       given.

       Without the --armor option, output will be in binary.

       If COMMAND requires public or private keys, rnp will look for the keyrings in ~/.rnp. The
       options --homedir and --keyfile override this (see below).

       If COMMAND needs a password, rnp will ask for it via stdin or tty, unless the --password
       or --pass-fd option was specified.

COMMANDS

INFORMATIONAL
-h, --help
Displays a short help message. No options are expected.

-V, --version
Displays version information. No options are expected.

ENCRYPTION AND SIGNING
-e, --encrypt
Encrypt data with public key(s), and optionally sign, if the --sign command is added.

You would likely want to specify one or more --recipient(s) or pick a --cipher
(instead of the default).

Additional options:

--recipient
Specify one or more recipients.

--cipher
Select a specific cipher.

-z 0..9, --zlib, --zip, --bzip
Select a compression algorithm and level.

--armor
Output ASCII data instead of binary via the --armor option. If the input file is
file.ext, and --output is not specified, then the data will be written (depending
on --armor option) to file.ext.pgp or file.ext.asc.

--no-wrap
Do not wrap the output in literal data packet. This could be used to encrypt a
file which is already signed or encrypted. By default this would also disable
compression, use option -z to override.

--overwrite
If the destination file already exists, and the --overwrite option is not given,
the caller will be asked for the permission to overwrite or to provide a new file
name. Please see the OPTIONS section for more information.

-c, --symmetric
Encrypt data with password(s).

Can be combined with the commands --encrypt and --sign.

Options that apply to the --encrypt command also apply here.

Additional options:

--passwords
Encryption to multiple passwords is possible with --passwords option. Each
password would be asked via stdin/tty unless --password or --pass-fd is specified.

-s, --sign
Digitally sign data, using one or more secret keys you own.

Public-key or password-based encryption may be added via the --encrypt and --symmetric
commands.

Additional options:

-u, --userid
By default, the first secret key you own will be selected for signing. Apply this
option to select a different key or to use multiple keys.

--detach
By default, the signature is stored together with signed data. This option
detaches the data signature to a separate file (file.ext.sig).

--hash
You may want to use --hash option to override default hash algorithm settings. As
with encryption, output may be converted to ascii via the --armor option.

Compression options also apply here. Since the secret key is usually stored
encrypted, you will be asked for the password to decrypt it via stdin/tty unless
--password or --pass-fd is specified.

--clearsign
Digitally sign text data, producing human-readable output with the signature attached.

In this mode, data cannot be additionally encrypted or compressed.

Other signing options, --hash, -u, --password, can still be used here.

DECRYPTION AND VERIFICATION
-d, --decrypt
Decrypt and verify data from the INPUT_FILE or stdin.

If the data is signed, signature verification information will be printed to
stdout/tty.

Additional options:

--output
Override the default output selection with a file name or stdout specifier (-).
For the default output path selection see the BASICS section.

--password, --pass-fd
Depending on encryption options, you may be asked for the password of one of your
secret keys, or for the encryption password. These options override that behavior
such that you can input the password through automated means.

-v, --verify
Verify signature(s) without writing embedded data out, if any (unless option --output
is specified).

To verify the detached signature of a file file.ext, the detached signature file in
the file name pattern of file.ext.sig or file.ext.asc must exist.

Also you may use option --source to specify the exact source for the signed data.

If data is encrypted, you may be asked for password as in the --decrypt command.

OTHER COMMANDS
--list-packets
Show detailed information about the OpenPGP data in INPUT_FILE or stdin. Useful for
curiosity, troubleshooting or debugging.

Additional options can be used:

--json
output JSON data instead of human-readable information

--grips
print out key fingerprints and grips

--mpi
print out all MPI values

--raw
print raw, hex-encoded packets too

--enarmor[=msg|pubkey|seckey|sign]
Convert binary data to the ASCII-armored as per OpenPGP standard. This includes the
-----BEGIN PGP MESSAGE----- header and footer, and Base64-encoded data.

Output for file.ext will be written to file.ext.asc (if it does not exist) or to
stdout.

The following OpenPGP headers may be specified:

msg (default)

-----BEGIN PGP MESSAGE-----
pubkey

-----BEGIN PGP PUBLIC KEY BLOCK-----
seckey

-----BEGIN PGP SECRET KEY BLOCK-----
sign

-----BEGIN PGP SIGNATURE-----
Additional options:

--overwrite
Forcefully overwrite existing destination file if it exists.

--output
Specify destination file path.

--dearmor
Attempts to convert data from an armored format to the binary format.

The file.ext.asc output file would be written to file.ext. If the destination file
already exists, it will prompt the user for a new filename.

Additional options:

--overwrite
Forcefully overwrite existing destination file if it exists.

--output
Specify destination file path.

OPTIONS

--home, --homedir DIR
Change homedir (where RNP looks for keyrings) to the specified value.

The default homedir is ~/.rnp .

-f, --keyfile PATH
Instead of loading keyrings, use key(s) from the file specified.

-u, --userid KEY
Specify one or more signing keys, searching for it via the given value KEY. See
rnpkeys(1) on how to find valid values.

-r, --recipient KEY
Add the message recipient, i.e. the public key to which message will be encrypted to.
See rnpkeys(1) on how to find valid values.

--armor, --ascii
Apply ASCII armoring to the output, so that the resulting output can be transferred as
plain text.

See IETF RFC 4880 for more details.

--detach, --detached
Create a detached signature.

--output PATH
Write data processing related output to the file specified.

If not specified, the output filename will be guessed from the input
filename/extension or the command will prompt the user via stdin/tty.

--overwrite
Overwrite already existing files without prompt.

--source
Specify signed data for the detached signature verification (- and env: substitutions
may be used here).

--hash ALGORITHM
Set hash algorithm which to be used for signing and derivation of the encryption key
from a password.

The default value is SHA256.

--cipher ALGORITHM
Set the symmetric algorithm used during encryption.

The default value is AES256.

--aead [EAX, OCB]
Enable AEAD encryption and select algorithm to be used.

--aead-chunk-bits BITS
Change AEAD chunk size bits, from 0 to 16 (actual chunk size would be 1 << (6 +
bits)). See OpenPGP documentation for the details.

--zip, --zlib, --bzip2
Select corresponding algorithm to compress data with. Please refer to IETF RFC 4880
for details.

-z 0..9
Set compression level for the compression algorithms.

9 is the highest compression level, where 0 disables compression.

The default value is 6.

--pass-fd FD
Specify a file descriptor to read passwords from instead of from stdin/tty.

Useful for automated or non-interactive sessions.

--password PASSWORD
Use the specified password when it is needed.

Warning
Not recommended for production use due to potential security issues. Use --pass-fd
for batch operations instead.

--passwords COUNT
Set the number of passwords for --symmetric encryption.

While not commonly used, you may encrypt a message to any reasonable number of
passwords.

--creation TIME
Override signature creation time.

By default, creation time is set to the current local computer time.

TIME could be specified in the ISO 8601-1:2019 date format (yyyy-mm-dd), or in the
UNIX timestamp format.

--expiration TIME
Set signature expiration time, counting from the creation time.

By default, signatures do not expire.

A specific expiration time can be specified as:

• expiration date in the ISO 8601:2019 date format (yyyy-mm-dd); or

• hours/days/months/years since creation time with the syntax of 20h/30d/1m/1y;

• number of seconds.

--keystore-format GPG|KBX|G10|G21
Set keystore format.

RNP automatically detects the keystore format.

This option allows the auto-detection behavior to be overridden.

--notty
Disable use of tty.

By default RNP would detect whether TTY is attached and use it for user prompts.

This option overrides default behaviour so user input may be passed in batch mode.

--current-time TIME
Override system’s time with a specified value.

By default RNP uses system’s time in all signature/key checks, however in some
scenarios it could be needed to override this.

TIME may be specified in the same way as --creation.

--set-filename FNAME
Override or set a file name, stored inside of OpenPGP message.

By default RNP will store input filename (or empty string for stdin/env input) in the
resulting OpenPGP message during encryption or embedded signing. This option allows to
override this. Special value _CONSOLE may be used for "for your eyes only"-message.
Refer OpenPGP documentation for the details.

--allow-hidden
Allow hidden recipient support.

Sender of an encrypted message may wish to hide recipient’s key by setting a Key ID
field to all zeroes. In this case receiver has to try every available secret key,
checking for a valid decrypted session key. This option is disabled by default.

EXIT STATUS

       0
           Success.

       Non-zero
           Failure.

EXAMPLES

       The following examples demonstrate method of usage of the rnp command.

   EXAMPLE 1
       rnp --homedir .rnp --encrypt -r 0x6E69636B6F6C6179 --output document.txt.encrypted
       document.txt

       Load keyrings from the .rnp folder, encrypt the document.txt file using the key with keyid
       0x6E69636B6F6C6179.

   EXAMPLE 2
       rnp --keyfile john-sec.asc -s --detach --hash SHA512 document.txt

       Generate a detached signature over the file document.txt, using the secret key stored in
       the file. Additionally override the hash algorithm to SHA512.

   EXAMPLE 3
       rnp --keyfile john-pub.asc --verify document.txt.sig

       Verify detached signature, using the key stored in the john-pub.asc file. The signed data
       is assumed to be available from the file document.txt.

   EXAMPLE 4
       rnp -e -c -s --passwords 3 -r 0x526F6E616C642054 -r "john@doe.com" -u 0x44616E69656C2057
       document.txt

       Encrypt document.txt with 2 keys (specified via keyid 0x526F6E616C642054 and userid
       john@doe.com), and 3 passwords, so any of these may be used to decrypt the resulting file.

       Additionally, the message will be signed with key 0x44616E69656C2057.

   EXAMPLE 5
       printf "Message" | rnp --keyfile env:PGP_ENCRYPTION_KEY -e - --armor

       Encrypt message, passed via stdin, using the key, stored in environment variable
       PGP_ENCRYPTION_KEY, add ascii armoring, and print result to the stdout.

BUGS

       Please report issues via the RNP public issue tracker at:
       https://github.com/rnpgp/rnp/issues.

       Security reports or security-sensitive feedback should be reported according to the
       instructions at: https://www.rnpgp.org/feedback.

AUTHORS

       RNP is an open source project led by Ribose and has received contributions from numerous
       individuals and organizations.

RESOURCES

       Web site: https://www.rnpgp.org

       Source repository: https://github.com/rnpgp/rnp

COPYING

       Copyright (C) 2017-2021 Ribose. The RNP software suite is freely licensed: please refer to
       the LICENSE file for details.

AUTHOR

RNP

NAME

SYNOPSIS

DESCRIPTION

COMMANDS

OPTIONS

EXIT STATUS

EXAMPLES

BUGS

AUTHORS

RESOURCES

COPYING

SEE ALSO

AUTHOR