Show reason of revocation for 0xDEADBEEF with gpg.

gpg --export 0xDEADBEEF | gpg --list-packets | grep -Pzao ':signature packet:.*\n\t.*sigclass 0x20(\n\t.*)*'

Shows a sigclass 0x20 (Key revocation) signature packet on a key, including all subpackets. Subpacket 2 is the date of revocation, subpacket 26 the relevant policy, subpacket 29 the reason of revocation (cf. http://rfc.askapache.com/rfc4880/rfc4880.html#section-5.2.3.23 ) and subpacket 16 the issuer of the revocation certificate (usually should be the same as the revoked key).

Sample Output

:signature packet: algo 1, keyid DEADBEEFDEADBEEF
	version 4, created 1361391004, md5len 0, sigclass 0x20
	digest algo 8, begin of digest ef ce
	hashed subpkt 2 len 4 (sig created 2013-02-20)
	hashed subpkt 26 len 21 (policy: http://example.net/policy)
	hashed subpkt 29 len 23 (revocation reason 0x01 (I felt funny and wanted to revoke this key))
	subpkt 16 len 8 (issuer key ID DEADBEEFDEADBEEF)
	data: [4093 bits]

By: claudius

2013-03-05 14:11:11

gpg grep GPG revocation

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