Plugin: gpgme

• infos = Information about gpgme plugin is in keys below
• infos/author = Peter Nirschl peter.nosp@m..nir.nosp@m.schl@.nosp@m.gmai.nosp@m.l.com
• infos/licence = BSD
• infos/provides = crypto
• infos/needs =
• infos/recommends =
• infos/placements = postgetstorage presetstorage
• infos/status = unittest configurable memleak experimental unfinished
• infos/metadata = crypto/encrypt gpg/binary
• infos/description = Cryptographic operations wit GnuPG Made Easy (GPGME)

Introduction

The gpgme plugin is a filter plugin that enables users to encrypt values before they are persisted and to decrypt values after they have been read from a backend. The encryption and decryption is designed to work transparently.

The cryptographic operations are performed by GnuPG via the libgpgme library.

Installation

See installation. The package is called libelektra5-experimental.

Dependencies

• libgpgme11 version 1.10 or later

Build Information

The plugin has been tested on Ubuntu 18.04 with libgpgme version 1.10.

Examples

You can mount the plugin like this:

kdb mount test.ecf /t gpgme "encrypt/key=DDEBEF9EE2DC931701338212DAF635B17F230E8D"

Now you can specify a key user:/t/a and protect its content by using:

kdb set user:/t/a
kdb meta-set user:/t/a crypt/encrypt 1
kdb set user:/t/a "secret"

The value of user:/t/a (for this example: "secret") will be stored encrypted. You can still access the original value by using kdb get:

kdb get user:/t/a

Configuration

GnuPG Keys

The GPG recipient keys can be specified in two ways:

1. The GPG recipient key can be specified as encrypt/key directly.
2. If you want to specify multiple keys, you can enumerate them under encrypt/key.

The following example illustrates how multiple GPG recipient keys can be specified:

encrypt/key/#0
encrypt/key/#1

Textmode

gpgme operates in textmode per default. In textmode the output of GPG is ASCII armored.

Textmode can be disabled by setting /gpgme/textmode to 0 in the plugin configuration.

Technical Details

Message Format

The encrypted values are valid PGP messages, that can be decrypted and read solely by the GnuPG binary without Elektra.