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gpg-preset-passphrase - Put a passphrase into gpg-agent's cache


gpg-preset-passphrase [options] [command] cache-id


The gpg-preset-passphrase is a utility to seed the internal cache of a running gpg-agent
with passphrases. It is mainly useful for unattended machines, where the usual pinentry
tool may not be used and the passphrases for the to be used keys are given at machine

Passphrases set with this utility don't expire unless the --forget option is used to
explicitly clear them from the cache --- or gpg-agent is either restarted or reloaded (by
sending a SIGHUP to it). Note that the maximum cache time as set with --max-cache-ttl is
still honored. It is necessary to allow this passphrase presetting by starting gpg-agent
with the --allow-preset-passphrase.

gpg-preset-passphrase is invoked this way:

gpg-preset-passphrase [options] [command] cacheid

cacheid is either a 40 character keygrip of hexadecimal characters identifying the key for
which the passphrase should be set or cleared. The keygrip is listed along with the key
when running the command: gpgsm --dump-secret-keys. Alternatively an arbitrary string may
be used to identify a passphrase; it is suggested that such a string is prefixed with the
name of the application (e.g foo:12346).

One of the following command options must be given:

Preset a passphrase. This is what you usually will use. gpg-preset-passphrase will
then read the passphrase from stdin.

Flush the passphrase for the given cache ID from the cache.

The following additional options may be used:


Output additional information while running.

-P string

--passphrase string
Instead of reading the passphrase from stdin, use the supplied string as
passphrase. Note that this makes the passphrase visible for other users.

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