2018-05-15 03:13:16 +00:00
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE dita PUBLIC "-//OASIS//DTD DITA Composite//EN" "ditabase.dtd">
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2018-05-15 03:50:14 +00:00
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<dita xml:lang="en-GB">
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2018-05-15 03:13:16 +00:00
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<topic id="topic_p15_1yz_5db">
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<title>Key Certification</title>
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<body>
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<p>Since key certification is more frequently referred to as key signing, the method used to
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perform this function is <codeph>key_sign</codeph>.</p>
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<p>The <codeph>key_sign</codeph> method takes four arguments: <codeph>key</codeph>,
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<codeph>uids</codeph>, <codeph>expires_in</codeph> and <codeph>local</codeph>. The default
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value of <codeph>uids</codeph> is <codeph>None</codeph> and which results in all user IDs
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being selected. The default value of both <codeph>expires_in</codeph> and
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<codeph>local</codeph> is <codeph>False</codeph>; which results in the signature never
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expiring and being able to be exported.</p>
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<p>The <codeph>key</codeph> is the key being signed rather than the key doing the signing. To
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change the key doing the signing refer to the signing key selection above for signing
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messages and files.</p>
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<p>If the <codeph>uids</codeph> value is not <codeph>None</codeph> then it must either be a
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string to match a single user ID or a list of strings to match multiple user IDs. In this
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case the matching of those strings must be precise and it is case sensitive.</p>
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<p>To sign Danger Mouse's key for just the initial user ID with a signature which will last a
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little over a month, do this:</p>
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<p>
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<codeblock id="cert-1" outputclass="language-python">import gpg
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c = gpg.Context()
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uid = "Danger Mouse <dm@secret.example.net>"
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dmfpr = "177B7C25DB99745EE2EE13ED026D2F19E99E63AA"
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key = c.get_key(dmfpr, secret=True)
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c.key_sign(key, uidsuid, expires_in=2764800)
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</codeblock>
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</p>
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</body>
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</topic>
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</dita>
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