"!" indicates that the signature has been successfully verified, a "-"
denotes a bad signature and a "%" is used if an error occurred while
checking the signature (e.g. a non supported algorithm). Signatures
-where the public key is not availabale are not listed; to see their
+where the public key is not available are not listed; to see their
keyids the command @option{--list-sigs} can be used.
For each signature listed, there are several flags in between the
particular external methods as defined by @option{--auto-key-locate} may
be used to locate a key. Only public keys are listed.
+@item --show-keys
+@opindex show-keys
+This commands takes OpenPGP keys as input and prints information about
+them in the same way the command @option{--list-keys} does for locally
+stored key. In addition the list options @code{show-unusable-uids},
+@code{show-unusable-subkeys}, @code{show-notations} and
+@code{show-policy-urls} are also enabled. As usual for automated
+processing, this command should be combined with the option
+@option{--with-colons}.
+
@item --fingerprint
@opindex fingerprint
List all keys (or the specified ones) along with their
receiving side can check for transmission errors or tampering at the
end of each chunk and does not need to delay this until all data has
been received. The used chunk size is 2^@var{n} byte. The lowest
-allowed value for @var{n} is 6 (64 byte) and the largest is 62 (4
-EiB). The default value for @var{n} is 30 which creates chunks not
-larger than 1 GiB.
+allowed value for @var{n} is 6 (64 byte) and the largest is the
+default of 27 which creates chunks not larger than 128 MiB.
@item --input-size-hint @var{n}
@opindex input-size-hint
Show a listing of the key as imported right before it is stored.
This can be combined with the option @option{--dry-run} to only look
at keys; the option @option{show-only} is a shortcut for this
- combination. Note that suffixes like '#' for "sec" and "sbb" lines
+ combination. The command @option{--show-keys} is another shortcut
+ for this. Note that suffixes like '#' for "sec" and "sbb" lines
may or may not be printed.
@item import-export
Boolean indicating whether a key or subkey is a secret one.
(drop-subkey)
+ @item usage
+ A string indicating the usage flags for the subkey, from the
+ sequence ``ecsa?''. For example, a subkey capable of just signing
+ and authentication would be an exact match for ``sa''. (drop-subkey)
+
@item sig_created
@itemx sig_created_d
The first is the timestamp a signature packet was created. The
method. See also options @option{--aead-algo} and
@option{--chunk-size}.
-This option requires the use of option @option{--rfc4880bis} to
-declare that a not yet standardized feature is used.
+As of now this option requires the use of option @option{--rfc4880bis}
+to declare that a not yet standardized feature is used.
@item --force-mdc
+@itemx --disable-mdc
@opindex force-mdc
-Force the use of encryption with a modification detection code. This
-is always used with the newer ciphers (those with a blocksize greater
-than 64 bits), or if all of the recipient keys indicate MDC support in
-their feature flags.
-
-@item --disable-mdc
@opindex disable-mdc
-Disable the use of the modification detection code. Note that by
-using this option, the encrypted message becomes vulnerable to a
-message modification attack.
+These options are obsolete and have no effect since GnuPG 2.2.8. The
+MDC is always used unless the keys indicate that an AEAD algorithm can
+be used in which case AEAD is used. But note: If the creation of a
+legacy non-MDC message is exceptionally required, the option
+@option{--rfc2440} allows for this.
@item --disable-signer-uid
@opindex disable-signer-uid
@item --rfc2440
@opindex rfc2440
Reset all packet, cipher and digest options to strict RFC-2440
-behavior.
+behavior. Note that by using this option encryption packets are
+created in a legacy mode without MDC protection. This is dangerous
+and should thus only be used for experiments. See also option
+@option{--ignore-mdc-error}.
@item --pgp6
@opindex pgp6
-Set up all options to be as PGP 6 compliant as possible. This
-restricts you to the ciphers IDEA (if the IDEA plugin is installed),
-3DES, and CAST5, the hashes MD5, SHA1 and RIPEMD160, and the
-compression algorithms none and ZIP. This also disables
-@option{--throw-keyids}, and making signatures with signing subkeys as PGP 6
-does not understand signatures made by signing subkeys.
-
-This option implies @option{--disable-mdc --escape-from-lines}.
+This option is obsolete; it is handled as an alias for @option{--pgp7}
@item --pgp7
@opindex pgp7
-Set up all options to be as PGP 7 compliant as possible. This is
-identical to @option{--pgp6} except that MDCs are not disabled, and the
-list of allowable ciphers is expanded to add AES128, AES192, AES256, and
-TWOFISH.
+Set up all options to be as PGP 7 compliant as possible. This allowd
+the ciphers IDEA, 3DES, CAST5,AES128, AES192, AES256, and TWOFISH.,
+the hashes MD5, SHA1 and RIPEMD160, and the compression algorithms
+none and ZIP. This option implies @option{--escape-from-lines} and
+disables @option{--throw-keyids},
@item --pgp8
@opindex pgp8
prints the current size. Note well: This is a maintainer only option
and may thus be changed or removed at any time without notice.
+@item --debug-allow-large-chunks
+@opindex debug-allow-large-chunks
+To facilitate in-memory decryption on the receiving site, the largest
+recommended chunk size is 128 MiB (@code{--chunk-size 27}). This
+option allows to specify a limit of up to 4 EiB (@code{--chunk-size
+62}) for experiments.
+
@item --faked-system-time @var{epoch}
@opindex faked-system-time
This option is only useful for testing; it sets the system time back or
meaningful when making a key signature (certification), and %c is only
meaningful when using the OpenPGP smartcard.
+@item --known-notation @var{name}
+@opindex known-notation
+Adds @var{name} to a list of known critical signature notations. The
+effect of this is that gpg will not mark a signature with a critical
+signature notation of that name as bad. Note that gpg already knows
+by default about a few critical signatures notation names.
+
@item --sig-policy-url @var{string}
@itemx --cert-policy-url @var{string}
@itemx --set-policy-url @var{string}
@item --ignore-mdc-error
@opindex ignore-mdc-error
This option changes a MDC integrity protection failure into a warning.
-This can be useful if a message is partially corrupt, but it is
-necessary to get as much data as possible out of the corrupt message.
-However, be aware that a MDC protection failure may also mean that the
-message was tampered with intentionally by an attacker.
+It is required to decrypt old messages which did not use an MDC. It
+may also be useful if a message is partially garbled, but it is
+necessary to get as much data as possible out of that garbled message.
+Be aware that a missing or failed MDC can be an indication of an
+attack. Use with great caution; see also option @option{--rfc2440}.
@item --allow-weak-digest-algos
@opindex allow-weak-digest-algos
@opindex default-new-key-algo @var{string}
This option can be used to change the default algorithms for key
generation. The @var{string} is similar to the arguments required for
-the command @option{--quick-add-key} but slighly different. For
+the command @option{--quick-add-key} but slightly different. For
example the current default of @code{"rsa2048/cert,sign+rsa2048/encr"}
(or @code{"rsa3072"}) can be changed to the value of what we currently
call future default, which is @code{"ed25519/cert,sign+cv25519/encr"}.
@item --allow-multiple-messages
@item --no-allow-multiple-messages
-@opindex allow-multiple-messages
-Allow processing of multiple OpenPGP messages contained in a single file
-or stream. Some programs that call GPG are not prepared to deal with
-multiple messages being processed together, so this option defaults to
-no. Note that versions of GPG prior to 1.4.7 always allowed multiple
-messages.
-
-Warning: Do not use this option unless you need it as a temporary
-workaround!
-
+These are obsolete options; they have no more effect since GnuPG 2.2.8.
@item --enable-special-filenames
@opindex enable-special-filenames
@end table
+When calling the gpg-agent component @command{@gpgname} sends a set of
+environment variables to gpg-agent. The names of these variables can
+be listed using the command:
+
+@example
+ gpg-connect-agent 'getinfo std_env_names' /bye | awk '$1=="D" @{print $2@}'
+@end example
+
+
@c *******************************************
@c *************** ****************
projects / gnupg.git / blobdiff