McAfee MEJCAE-AM-DA Product Guide - Page 51
Specifying the type of signature you want to add to a key, Adding an expiration date to your signature
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Working with Digital Signatures Removing signatures from your key Specifying the type of signature you want to add to a key Use the --sig-type modifier with the --key-sign option to specify the type of signature you want to attach to the key you are signing. ebs --key-sign
49
E-Business Server
™
8.6
Product Guide
Working with Digital Signatures
Removing signatures from your key
Specifying the type of signature you want to add to a key
Use the
--sig-type
modifier with the
--key-sign
option to specify the type of signature you want to attach to
the key you are signing.
ebs --key-sign <recipient’s_userID> --sig-type <type>
Where
<type>
is one of the following:
•
Local
. Local signatures are non-exportable. This signature type remains on your local keyring.
•
Exportable
. Exportable signatures, the default option, are attached to the key certifying that you verify
the key owner’s identity. This signature type can be exported to a file or key server so other users can
view them.
•
Meta
. Meta signatures (always non-exportable) bestow meta-introducer status on the key. Any key
considered trusted by the meta-introducer is considered a trusted introducer by you, and any key
considered valid by the trusted introducer is considered valid to you.
•
Introducer
. Introducer
signatures bestow trusted introducer status on the key. Any key considered valid
by a trusted introducer is considered valid to you.
You can add a regular expression to an ’introducer’ type signature by including
--regexp <expression>
on the
command line. This restricts the scope of the target key’s signature power. For more information about
regular expressions, see
Attaching Regular Expressions to Signatures
.
Adding an expiration date to your signature
Use the
--expires-after
modifier with the
--key-sign
option to append an expiration date to your signature
on the recipient’s key. Set
<expiration>
equal to the number of days until your signature expires or a future
date you want your signature to expire in YYYY-MM-DD format. To set the signature to never expire, set
<expiration>
equal to zero. To add an expiration date to your signature, use the following syntax:
ebs --key-sign <recipient’s_userID> --expires-after <expiration>
For example, if you want to sign Gilbert Sampson’s key and have your signature expire in two weeks (or 14
days), you would enter:
ebs --key-sign “gilbert sampson” --expires-after 14
If you do not want your signature to expire, then you would enter:
ebs --key-sign “gilbert sampson” --expires-after 0
If you want your signature to expire on July 16, 2003, then you would enter:
ebs --key-sign “gilbert sampson” --expires-after 2003-07-16
Removing signatures from your key
Use the
--remove-sig
modifier with the
--key-edit
option to remove signatures from a local copy of your key.
Bear in mind, however, that if others have signed a copy of your key that is residing on a public key server,
the signatures will reappear on your key when you synchronize your key with the one on the key server. For
more information on the
--key-edit
option, see
Editing your key
on page 33
.
To remove selected signatures from a user ID on a key:
ebs --key-edit <userID of key being edited> --remove-sig <userID or keyID of signature to remove>
For example:
ebs --key-edit “Batman” --remove-sig “The Joker”
In the above example, E-Business Server is instructed to delete The Joker’s signature from Batman’s key.