Closed12

notationの追加による公開鍵のパケットの変化

ピン留めされたアイテム

公開鍵の交換手順

User IDパケット内の最新のsignature packetを採用するようだ。

RFC-4880

Transferable Public Keys

https://tools.ietf.org/html/rfc4880#section-11.1
  • One or more User ID packets
  • After each User ID packet, zero or more Signature packets (certifications)

:

Immediately following each User ID packet, there are zero or more Signature packets. Each Signature packet is calculated on the immediately preceding User ID packet and the initial Public-Key packet. The signature serves to certify the corresponding public key and User ID. In effect, the signer is testifying to his or her belief that this public key belongs to the user identified by this User ID.

Notes on Self-Signatures

https://tools.ietf.org/html/rfc4880#section-5.2.3.3

An implementation that encounters multiple self-signatures on the same object may resolve the ambiguity in any way it sees fit, but it is RECOMMENDED that priority be given to the most recent self-signature.

GnuPGのソースコード

g10/keyedit.cに登場するsignode->pkt->pkt.signature->flags.chosen_selfsigが有効になっているsignature packetが有効になっているパケットのようだ。このフラグに代入しているのはg10/getkey.c

/* Apply information from SIGNODE (which is the valid self-signature
 * associated with that UID) to the UIDNODE:
 * - wether the UID has been revoked
 * - assumed creation date of the UID
 * - temporary store the keyflags here
 * - temporary store the key expiration time here
 * - mark whether the primary user ID flag hat been set.
 * - store the preferences
 */
static void
fixup_uidnode (KBNODE uidnode, KBNODE signode, u32 keycreated)
{
  :
  sig->flags.chosen_selfsig = 1;/* We chose this one. */
  :
}
/* Use the self-signed data to fill in various fields in subkeys.
 *
 * KEYBLOCK is the whole keyblock.  SUBNODE is the subkey to fill in.
 *
 * Sets the following fields on the subkey:
 *
 *   main_keyid
 *   flags.valid        if the subkey has a valid self-sig binding
 *   flags.revoked
 *   flags.backsig
 *   pubkey_usage
 *   has_expired
 *   expired_date
 *
 * On this subkey's most revent valid self-signed packet, the
 * following field is set:
 *
 *   flags.chosen_selfsig
 */
static void
merge_selfsigs_subkey (ctrl_t ctrl, kbnode_t keyblock, kbnode_t subnode)
{
  :

  /* Find the latest key binding self-signature.  */
  :
  for (k = subnode->next; k && k->pkt->pkttype != PKT_PUBLIC_SUBKEY;
       k = k->next)
    {
    :
    }

  /* No valid key binding.  */
  if (!signode)
    return;

  sig = signode->pkt->pkt.signature;
  sig->flags.chosen_selfsig = 1; /* So we know which selfsig we chose later.  */

    :
}

公開鍵の操作

テスト用の鍵対を生成。tester <test@example.com>のものをパスフレーズ無しで生成した。

$ gpg --generate-key

パケットの記録

$ gpg --export --armor tester | gpg --list-packets > packets-1.txt

notationの追加

$ gpg --edit-key tester
  :
gpg> notation
Enter the notation: test@example.com=test1
No notations on user ID "tester <test@example.com>"
Adding notation: test@example.com=test1

sec  rsa3072/AD0C4A45B9B73A90
     created: 2021-03-03  expires: 2023-03-03  usage: SC
     trust: ultimate      validity: ultimate
ssb  rsa3072/8ED7C58299BFF379
     created: 2021-03-03  expires: 2023-03-03  usage: E
[ultimate] (1). tester <test@example.com>

gpg> save

パケットの記録

$ gpg --export --armor tester | gpg --list-packets > packets-2.txt
$ diff -u packets-?.txt
--- packets-1.txt	2021-03-02 21:34:17.000000000 -1000
+++ packets-2.txt	2021-03-02 21:34:50.000000000 -1000
@@ -6,12 +6,10 @@
 	keyid: AD0C4A45B9B73A90
 # off=400 ctb=b4 tag=13 hlen=2 plen=25
 :user ID packet: "tester <test@example.com>"
-# off=427 ctb=89 tag=2 hlen=3 plen=468
+# off=427 ctb=89 tag=2 hlen=3 plen=499
 :signature packet: algo 1, keyid AD0C4A45B9B73A90
-	version 4, created 1614756795, md5len 0, sigclass 0x13
-	digest algo 8, begin of digest 4c 85
-	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
-	hashed subpkt 2 len 4 (sig created 2021-03-03)
+	version 4, created 1614756883, md5len 0, sigclass 0x13
+	digest algo 8, begin of digest c0 f5
 	hashed subpkt 27 len 1 (key flags: 03)
 	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
 	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
@@ -19,15 +17,18 @@
 	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
 	hashed subpkt 30 len 1 (features: 01)
 	hashed subpkt 23 len 1 (keyserver preferences: 80)
+	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
+	hashed subpkt 2 len 4 (sig created 2021-03-03)
+	hashed subpkt 20 len 29 (notation: test@example.com=test1)
 	subpkt 16 len 8 (issuer key ID AD0C4A45B9B73A90)
 	data: [3072 bits]
-# off=898 ctb=b9 tag=14 hlen=3 plen=397
+# off=929 ctb=b9 tag=14 hlen=3 plen=397
 :public sub key packet:
 	version 4, algo 1, created 1614756795, expires 0
 	pkey[0]: [3072 bits]
 	pkey[1]: [17 bits]
 	keyid: 8ED7C58299BFF379
-# off=1298 ctb=89 tag=2 hlen=3 plen=444
+# off=1329 ctb=89 tag=2 hlen=3 plen=444
 :signature packet: algo 1, keyid AD0C4A45B9B73A90
 	version 4, created 1614756795, md5len 0, sigclass 0x18
 	digest algo 8, begin of digest 7e ea

notationの削除

$ gpg --edit-key tester
  :
gpg> notation
Enter the notation: -test@example.com=test1
Current notations for user ID "tester <test@example.com>":
         test@example.com=test1
Removing notation: test@example.com=test1
Proceed? (y/N) y

sec  rsa3072/AD0C4A45B9B73A90
     created: 2021-03-03  expires: 2023-03-03  usage: SC
     trust: ultimate      validity: ultimate
ssb  rsa3072/8ED7C58299BFF379
     created: 2021-03-03  expires: 2023-03-03  usage: E
[ultimate] (1). tester <test@example.com>

gpg> save

パケットの記録

$ gpg --export --armor tester | gpg --list-packets > packets-3.txt
$ diff -u packets-2.txt packets-3.txt
--- packets-2.txt	2021-03-02 21:34:50.000000000 -1000
+++ packets-3.txt	2021-03-02 21:36:12.000000000 -1000
@@ -6,10 +6,10 @@
 	keyid: AD0C4A45B9B73A90
 # off=400 ctb=b4 tag=13 hlen=2 plen=25
 :user ID packet: "tester <test@example.com>"
-# off=427 ctb=89 tag=2 hlen=3 plen=499
+# off=427 ctb=89 tag=2 hlen=3 plen=468
 :signature packet: algo 1, keyid AD0C4A45B9B73A90
-	version 4, created 1614756883, md5len 0, sigclass 0x13
-	digest algo 8, begin of digest c0 f5
+	version 4, created 1614756967, md5len 0, sigclass 0x13
+	digest algo 8, begin of digest ed bb
 	hashed subpkt 27 len 1 (key flags: 03)
 	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
 	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
@@ -19,16 +19,15 @@
 	hashed subpkt 23 len 1 (keyserver preferences: 80)
 	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
 	hashed subpkt 2 len 4 (sig created 2021-03-03)
-	hashed subpkt 20 len 29 (notation: test@example.com=test1)
 	subpkt 16 len 8 (issuer key ID AD0C4A45B9B73A90)
 	data: [3072 bits]
-# off=929 ctb=b9 tag=14 hlen=3 plen=397
+# off=898 ctb=b9 tag=14 hlen=3 plen=397
 :public sub key packet:
 	version 4, algo 1, created 1614756795, expires 0
 	pkey[0]: [3072 bits]
 	pkey[1]: [17 bits]
 	keyid: 8ED7C58299BFF379
-# off=1329 ctb=89 tag=2 hlen=3 plen=444
+# off=1298 ctb=89 tag=2 hlen=3 plen=444
 :signature packet: algo 1, keyid AD0C4A45B9B73A90
 	version 4, created 1614756795, md5len 0, sigclass 0x18
 	digest algo 8, begin of digest 7e ea

やっぱりsub packet 20の増減が見える

packets-1.txt

# off=0 ctb=99 tag=6 hlen=3 plen=397
:public key packet:
	version 4, algo 1, created 1614756795, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: AD0C4A45B9B73A90
# off=400 ctb=b4 tag=13 hlen=2 plen=25
:user ID packet: "tester <test@example.com>"
# off=427 ctb=89 tag=2 hlen=3 plen=468
:signature packet: algo 1, keyid AD0C4A45B9B73A90
	version 4, created 1614756795, md5len 0, sigclass 0x13
	digest algo 8, begin of digest 4c 85
	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
	hashed subpkt 2 len 4 (sig created 2021-03-03)
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	subpkt 16 len 8 (issuer key ID AD0C4A45B9B73A90)
	data: [3072 bits]
# off=898 ctb=b9 tag=14 hlen=3 plen=397
:public sub key packet:
	version 4, algo 1, created 1614756795, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: 8ED7C58299BFF379
# off=1298 ctb=89 tag=2 hlen=3 plen=444
:signature packet: algo 1, keyid AD0C4A45B9B73A90
	version 4, created 1614756795, md5len 0, sigclass 0x18
	digest algo 8, begin of digest 7e ea
	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
	hashed subpkt 2 len 4 (sig created 2021-03-03)
	hashed subpkt 27 len 1 (key flags: 0C)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	subpkt 16 len 8 (issuer key ID AD0C4A45B9B73A90)
	data: [3072 bits]

packets-2.txt

# off=0 ctb=99 tag=6 hlen=3 plen=397
:public key packet:
	version 4, algo 1, created 1614756795, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: AD0C4A45B9B73A90
# off=400 ctb=b4 tag=13 hlen=2 plen=25
:user ID packet: "tester <test@example.com>"
# off=427 ctb=89 tag=2 hlen=3 plen=499
:signature packet: algo 1, keyid AD0C4A45B9B73A90
	version 4, created 1614756883, md5len 0, sigclass 0x13
	digest algo 8, begin of digest c0 f5
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
	hashed subpkt 2 len 4 (sig created 2021-03-03)
	hashed subpkt 20 len 29 (notation: test@example.com=test1)
	subpkt 16 len 8 (issuer key ID AD0C4A45B9B73A90)
	data: [3072 bits]
# off=929 ctb=b9 tag=14 hlen=3 plen=397
:public sub key packet:
	version 4, algo 1, created 1614756795, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: 8ED7C58299BFF379
# off=1329 ctb=89 tag=2 hlen=3 plen=444
:signature packet: algo 1, keyid AD0C4A45B9B73A90
	version 4, created 1614756795, md5len 0, sigclass 0x18
	digest algo 8, begin of digest 7e ea
	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
	hashed subpkt 2 len 4 (sig created 2021-03-03)
	hashed subpkt 27 len 1 (key flags: 0C)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	subpkt 16 len 8 (issuer key ID AD0C4A45B9B73A90)
	data: [3072 bits]

packets-3.txt

# off=0 ctb=99 tag=6 hlen=3 plen=397
:public key packet:
	version 4, algo 1, created 1614756795, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: AD0C4A45B9B73A90
# off=400 ctb=b4 tag=13 hlen=2 plen=25
:user ID packet: "tester <test@example.com>"
# off=427 ctb=89 tag=2 hlen=3 plen=468
:signature packet: algo 1, keyid AD0C4A45B9B73A90
	version 4, created 1614756967, md5len 0, sigclass 0x13
	digest algo 8, begin of digest ed bb
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
	hashed subpkt 2 len 4 (sig created 2021-03-03)
	subpkt 16 len 8 (issuer key ID AD0C4A45B9B73A90)
	data: [3072 bits]
# off=898 ctb=b9 tag=14 hlen=3 plen=397
:public sub key packet:
	version 4, algo 1, created 1614756795, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: 8ED7C58299BFF379
# off=1298 ctb=89 tag=2 hlen=3 plen=444
:signature packet: algo 1, keyid AD0C4A45B9B73A90
	version 4, created 1614756795, md5len 0, sigclass 0x18
	digest algo 8, begin of digest 7e ea
	hashed subpkt 33 len 21 (issuer fpr v4 EB47FD5BEE0680AC9BEA095BAD0C4A45B9B73A90)
	hashed subpkt 2 len 4 (sig created 2021-03-03)
	hashed subpkt 27 len 1 (key flags: 0C)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	subpkt 16 len 8 (issuer key ID AD0C4A45B9B73A90)
	data: [3072 bits]

https://zenn.dev/zunda/scraps/9138f06678d68a でおかしくなった公開鍵

$ gpg --list-packets F60960D80B224382CA8D831CB56C20316D6E8279.asc
# off=0 ctb=c6 tag=6 hlen=3 plen=397 new-ctb
:public key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: B56C20316D6E8279
# off=400 ctb=cd tag=13 hlen=2 plen=24 new-ctb
:user ID packet: "zunda <zundan@gmail.com>"
# off=426 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1614578740, md5len 0, sigclass 0x13
	digest algo 10, begin of digest b8 7f
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-03-01)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3071 bits]
# off=897 ctb=c2 tag=2 hlen=3 plen=549 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1614578392, md5len 0, sigclass 0x13
	digest algo 10, begin of digest 25 fa
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-03-01)
	hashed subpkt 20 len 79 (notation: proof@metacode.biz=https://twitter.com/zundan/status/1366266732046770176)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=1449 ctb=c2 tag=2 hlen=3 plen=532 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1613530821, md5len 0, sigclass 0x13
	digest algo 10, begin of digest 95 3a
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-02-17)
	hashed subpkt 20 len 62 (notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=1984 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x13
	digest algo 10, begin of digest c9 94
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=2455 ctb=ce tag=14 hlen=3 plen=397 new-ctb
:public sub key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: 164F21FF001C8CD1
# off=2855 ctb=c2 tag=2 hlen=3 plen=444 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x18
	digest algo 10, begin of digest 1b 4a
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 0C)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3065 bits]

showprefでは期待どおりnotationが現われない。

$ gpg --edit-key F60960D80B224382CA8D831CB56C20316D6E8279
  :
gpg> showpref
[ultimate] (1). zunda <zundan@gmail.com>
     Cipher: AES256, AES192, AES, 3DES
     Digest: SHA512, SHA384, SHA256, SHA224, SHA1
     Compression: ZLIB, BZIP2, ZIP, Uncompressed
     Features: MDC, Keyserver no-modify

gpg> quit

が、show-notationsでは現われる。

$ gpg --check-sigs --list-options show-notations F60960D80B224382CA8D831CB56C20316D6E8279
pub   rsa3072 2020-06-24 [SC] [expires: 2022-06-24]
      F60960D80B224382CA8D831CB56C20316D6E8279
uid           [ultimate] zunda <zundan@gmail.com>
sig!3        B56C20316D6E8279 2021-03-01  zunda <zundan@gmail.com>
sig!3    N   B56C20316D6E8279 2021-02-17  zunda <zundan@gmail.com>
   Signature notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan
sig!3        B56C20316D6E8279 2020-06-24  zunda <zundan@gmail.com>
sig!3    N   B56C20316D6E8279 2021-03-01  zunda <zundan@gmail.com>
   Signature notation: proof@metacode.biz=https://twitter.com/zundan/status/1366266732046770176
sub   rsa3072 2020-06-24 [E] [expires: 2022-06-24]
sig!         B56C20316D6E8279 2020-06-24  zunda <zundan@gmail.com>

gpg: 5 good signatures

off=1984 ctb=c2 tag=2 hlen=3 plen=468 new-ctbのsignature packetでこれまでに現われたnotationをキャンセルしている気がしてきた。あるいはoff=426 ctb=c2 tag=2 hlen=3 plen=468 new-ctb

再掲して https://tools.ietf.org/html/rfc4880 よりコメントを追加。このsignature packetじたいには明示的にnotationをキャンセルするサブパケットはない

# off=1984 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x13
	digest algo 10, begin of digest c9 94
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279) #RFC4880にはsubpacket type 33は定義されていない
	hashed subpkt 2 len 4 (sig created 2020-06-24) # signature creation time
	hashed subpkt 27 len 1 (key flags: 03) # key flags: This key may be used to certify other keys || This key may be used to sign data.
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m) # key expiration time
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2) # Preferred Symmetric Algorithms
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2) # Preferred Hash Algorithms
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1) # Preferred Compression Algorithms
	hashed subpkt 30 len 1 (features: 01) # Features: Modification Detection (packets 18 and 19)
	hashed subpkt 23 len 1 (keyserver preferences: 80) # Key Server Preferences: No-modify -- the key holder requests that this key only be modified or updated by the key holder or an administrator of the key server
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279) # Issuer
	data: [3072 bits]

# off=426 ctb=c2 tag=2 hlen=3 plen=468 new-ctbと比較すると、同じsubpacketが別の順に並んでいる。

上記でkey serverに送らなかった公開鍵ではpublic key packetに続くsignature packetはひとつしかない。

やはりF60960D80B224382CA8D831CB56C20316D6E8279では2つめのsignature packetがnotationを消す役割を果しているように推測できる。

再度notationを追加してみる

$ gpg --edit-key F60960D80B224382CA8D831CB56C20316D6E8279
gpg (GnuPG) 2.2.19; Copyright (C) 2019 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Secret key is available.

sec  rsa3072/B56C20316D6E8279
     created: 2020-06-24  expires: 2022-06-24  usage: SC  
     trust: ultimate      validity: ultimate
ssb  rsa3072/164F21FF001C8CD1
     created: 2020-06-24  expires: 2022-06-24  usage: E   
[ultimate] (1). zunda <zundan@gmail.com>

gpg> notation
Enter the notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan
No notations on user ID "zunda <zundan@gmail.com>"
Adding notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan

sec  rsa3072/B56C20316D6E8279
     created: 2020-06-24  expires: 2022-06-24  usage: SC  
     trust: ultimate      validity: ultimate
ssb  rsa3072/164F21FF001C8CD1
     created: 2020-06-24  expires: 2022-06-24  usage: E   
[ultimate] (1). zunda <zundan@gmail.com>

gpg> save

ローカルでの状態の確認

showprefでは期待どおり追加したnotationのみが見える

$ gpg --edit-key F60960D80B224382CA8D831CB56C20316D6E8279
gpg (GnuPG) 2.2.19; Copyright (C) 2019 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Secret key is available.

sec  rsa3072/B56C20316D6E8279
     created: 2020-06-24  expires: 2022-06-24  usage: SC  
     trust: ultimate      validity: ultimate
ssb  rsa3072/164F21FF001C8CD1
     created: 2020-06-24  expires: 2022-06-24  usage: E   
[ultimate] (1). zunda <zundan@gmail.com>

gpg> showpref
[ultimate] (1). zunda <zundan@gmail.com>
     Cipher: AES256, AES192, AES, 3DES
     Digest: SHA512, SHA384, SHA256, SHA224, SHA1
     Compression: ZLIB, BZIP2, ZIP, Uncompressed
     Features: MDC, Keyserver no-modify
     Notations: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan

gpg> quit

check-sigsでは消したnotationも含めて見える

$ gpg --check-sigs --list-options show-notations F60960D80B224382CA8D831CB56C20316D6E8279
pub   rsa3072 2020-06-24 [SC] [expires: 2022-06-24]
      F60960D80B224382CA8D831CB56C20316D6E8279
uid           [ultimate] zunda <zundan@gmail.com>
sig!3    N   B56C20316D6E8279 2021-03-06  zunda <zundan@gmail.com>
   Signature notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan
sig!3    N   B56C20316D6E8279 2021-02-17  zunda <zundan@gmail.com>
   Signature notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan
sig!3        B56C20316D6E8279 2020-06-24  zunda <zundan@gmail.com>
sig!3    N   B56C20316D6E8279 2021-03-01  zunda <zundan@gmail.com>
   Signature notation: proof@metacode.biz=https://twitter.com/zundan/status/1366266732046770176
sub   rsa3072 2020-06-24 [E] [expires: 2022-06-24]
sig!         B56C20316D6E8279 2020-06-24  zunda <zundan@gmail.com>

gpg: 5 good signatures

パケットの確認。off=426に今回追加した署名が挿入された。off=961とoff=1967に消したnotationへの署名が残っている。off=1496に公開鍵への自己署名が見える。notationの追加前にoff=1984にあった2つめの自己署名はなくなったようだ。

$ gpg --export --armor F60960D80B224382CA8D831CB56C20316D6E8279 | gpg --list-packets
# off=0 ctb=99 tag=6 hlen=3 plen=397
:public key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: B56C20316D6E8279
# off=400 ctb=b4 tag=13 hlen=2 plen=24
:user ID packet: "zunda <zundan@gmail.com>"
# off=426 ctb=89 tag=2 hlen=3 plen=532
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1615012817, md5len 0, sigclass 0x13
	digest algo 10, begin of digest 3c 74
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-03-06)
	hashed subpkt 20 len 62 (notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=961 ctb=89 tag=2 hlen=3 plen=532
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1613530821, md5len 0, sigclass 0x13
	digest algo 10, begin of digest 95 3a
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-02-17)
	hashed subpkt 20 len 62 (notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=1496 ctb=89 tag=2 hlen=3 plen=468
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x13
	digest algo 10, begin of digest c9 94
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=1967 ctb=89 tag=2 hlen=3 plen=549
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1614578392, md5len 0, sigclass 0x13
	digest algo 10, begin of digest 25 fa
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-03-01)
	hashed subpkt 20 len 79 (notation: proof@metacode.biz=https://twitter.com/zundan/status/1366266732046770176)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=2519 ctb=b9 tag=14 hlen=3 plen=397
:public sub key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: 164F21FF001C8CD1
# off=2919 ctb=89 tag=2 hlen=3 plen=444
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x18
	digest algo 10, begin of digest 1b 4a
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 0C)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3065 bits]

追加したnotationのOpenPGP.jsでの確認

gpg --export --armor F60960D80B224382CA8D831CB56C20316D6E8279した内容を https://mitome.in/OpenPGP/keyPair.html#鍵の確認 に貼り付ける。

$ gpg --export --armor F60960D80B224382CA8D831CB56C20316D6E8279 
-----BEGIN PGP PUBLIC KEY BLOCK-----
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=fmeb
-----END PGP PUBLIC KEY BLOCK-----

4つのサブパケットに消した分も含めて3つのnotationと1つの自己署名が見える。

キーサーバへのアップロード

お騒がせします。

$ gpg --send-keys F60960D80B224382CA8D831CB56C20316D6E8279
gpg: sending key B56C20316D6E8279 to hkps://keys.openpgp.org

keyoxide.orgで追加したnotationが見えた。

$ curl -sL 'https://keys.openpgp.org/pks/lookup?op=get&options=mr&search=0xf60960d80b224382ca8d831cb56c20316d6e8279'
-----BEGIN PGP PUBLIC KEY BLOCK-----
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6UhSiezfwOCfMmw7K3xakG93CBGcZ/nhR79+SM5ENWz468TDrbpATZX/IJzZAqvH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BAl7K+IVsHgcgYoaUk2yB/HhnE1CB4hCqqpAY7hSSg7UFhaDXxgQ/NmDNz0k+GeS
7iBMwbYRSBH+xxPdRk/5Q2o0DXZb4WuEi7518pMDYiCFZen/fxp7/ziJ0t4iu1j7
23IpHfC+rZjZnafOFFP8fiPDgfgZ+A8H8gNi8OEpNsa27xjwTXZSM7eU5yWBNIzS
9elPJ4XiqnvstWvt1/ncbk84ihmqL7LV0i5IuHTpNTS8RKuPE/vy3lRFmTw421yD
89XGv41x6cmcRdG4McMwuGL2WG0lpxh4L3jpRHWdqRuReHJx3JuY3gQ1wP4Y57J3
9wxp3EOOWxxn+iLJT5Qmdq0TCLsqA5y4gSNY63bk0e99FOlnL6eRla5NlWg+9ZZr
CHyOnzuLXwhAlY/1Y/C2ksLBVAQTAQoAfgIbAwUJA8JnAAULCQgHAgYVCgkICwIE
FgIDAQIeAQIXgBYhBPYJYNgLIkOCyo2DHLVsIDFtboJ5BQJgLIbFPxSAAAAAABIA
JHByb29mQG1ldGFjb2RlLmJpemh0dHBzOi8vbWFzdG9kb24uenVuZGEubmluamEv
QHp1bmRhbgAKCRC1bCAxbW6CeZU6DADBi+qT6BIIgZIfNMIwR0UNJvb1J4vzPIBr
X8s4edKCo2T7Bx+fv0hwIhTEg3faXlk3oGNjn3/jwAQtUzX/mKGEvI436gXil+Os
sCWRIXOwAI4Gn4J8utPtUhI5DyGMBkt0YzQvhfOAWNm7Jar7pPgeZGtrOjvRspvH
pKsCBnOTJyaWm/vLEsqx+I0yUgnGploolfFX/WMRaGZxBoN4kdaX5EJV0WH9Rw5h
npoAJz0t7IO/EZaFfMMP99gZuycBVWjjv5OrsMKPDXJBBWvM+1dvLmHByfUi016a
8LYW0LCuks0bEO92UYU9Jsgn+APkzHt52/N6W7V9D8s1yzoa/Kzr0tVRi9s+l1cL
QEIoXFRA206CgN/zaeyCbgDZ3oNODc9IHDmnrP3n8r2q/ep8kvHhkHpxjWOoet5K
pjnOrM+D4guA8kzu7a/sfbxo+9De2FSLshtgBJA4WIPLj8tL9sMUTxPPdO+d+LDQ
jgg7cF9yw9qda8+nl45ejoeL6FXCxzHCwRQEEwEKAD4WIQT2CWDYCyJDgsqNgxy1
bCAxbW6CeQUCXvLkIQIbAwUJA8JnAAULCQgHAgYVCgkICwIEFgIDAQIeAQIXgAAK
CRC1bCAxbW6CecmUDACb1PcliZf7l9r5zDo5YzwxLaw8hCI3oz3bRX82aCv54bKK
jZiyTAbau5k6Dmz/Ry0FJcQJW+IaRCVKmyXzW/ANt0XKzqxZ2NWTlNiWlZygudJe
//XkqQUTtHLVhrSX6cwltNxqBudyNz8IaYRLmSSVacQYAsOyOiU82XH+g5Yt2TvD
2pSKFF5fdrn/jHct4NWH8/1URQSIrZ/UYB6CdYLvMSV9LjgieX7/u0HGmaVx2VzQ
XOxvfC+zlrlf8IQeftXYD2wFBIvpuAzqFba+s9XYS69GHjR6PvMLjYvXTDdQXkmh
M5Ghs11ko3lQHp07HPcI4EMgw66wj6mXzabvRP7TyAowXudh7fb3eqUPJgSJ6RO6
KqkYe1zAiilASpjnU0Trtb8SGcGAkosKV7rn7IlKhyJYTBT6fQPg7NuVTp+8TRT3
53lzkFEr/ZV5S/ONZq35hSwV+wxh8Vwj7AS5SRj0oLQURsF7kdSWH+A3ldvRSM8Q
Zp5UyNpxDUFq+uMK6OvOwM0EXvLkIQEMAMNGolRum3P3KEmiCn3cHsT77GORWpVt
vRq5+YaZbhp0mJXhUAUFaKWwBaDCvo7rBpNrHD6RLngVocKgzTg5niZj2AUiDm7a
xk6x4SvPy4rDW4sxCSxvpTLC6UidWrXcqHuEIvVfknAUNWRfae0BKcNn23vbf4Pt
e1/QQ4f4TrggFj2SVKY/RmSNIDJm+PxR9rJshP36bHkRniNRnk9hdjPnNUPzMwB5
rj/ts/OChB3w9JfIqnd5dFYR8kGFMimzVcWtcN+uE/YTi6hsiVp87kRmySjytE+r
KcEyyMUCFolKYd++PdvXC3jnJr210uR3Rvdztn+8T7pdeaTRqDJm8n5dBGGIXVdK
6wl+zh7fK4M7T2yh86jIvn1gMyzlZRtZKjZDnMHnV6OFaEhA8r+s3CdCyrSJh3BT
9GrW5g5CbSx614YCvxI8YO1WYGprugaZPFH1JHd3kARM125a84KarD7Y9z4N4a1I
xmYufn5vu32aKAVanp6+7hw0R+N3UTe+fwARAQABwsD8BBgBCgAmFiEE9glg2Asi
Q4LKjYMctWwgMW1ugnkFAl7y5CECGwwFCQPCZwAACgkQtWwgMW1ugnkbSgv5AQ1v
wX9SKBTvKkg68Om0LcPzD5U121kmG617vBh85Sw2LP/QNDzgVmbF2cDyhhI7sj5H
wLg4boAu3JtWUbD4eRfL1M1JRQkF/LpFhdLyVubh1LNIx/w5jTS0f2V5GUEWzD0I
pRcXanym/16KezK3f54lI255DnzBtWJeYssNYIOFKbgB3K3moLhI0ZswBxJTLfU3
DXUdxRZGsoNuVoAZEgTwggSJtJiNT7TcyBPIHbjwjF9wzs9YMcNSksp03LjMfgW1
U+hEOAQ5eDMyp/euCBfZyUt9WCPEvEVbc2IExgpWUm87nQ0Ij94ANU/j/byBqGPk
+Ns1MaizC+l4ASMxEYrnhtAHeADBcPzdH5jKSW0CjKZrRSguZZAi0F1U7KV+Haic
r1uSIJnMF1+BS6gNLEksdp571vzXya+JXtwCQNWlUMOFLSZMLzHcZ2JntwGBOWcq
cYe1FmPirpyjRpjboqoOgo3EQMY+lWusWgqm8d/PndEBcuUNdSOHnBA+uwBI
=KnIR
-----END PGP PUBLIC KEY BLOCK-----

サブパケットは、追加したnotation、自己署名、消したnotation、消したnotation、サブキーの順になっている。消したnotationが消したことになっている鍵がやっぱりわからない。

$ curl -sL 'https://keys.openpgp.org/pks/lookup?op=get&options=mr&search=0xf60960d80b224382ca8d831cb56c20316d6e8279' | gpg --list-packets
# off=0 ctb=c6 tag=6 hlen=3 plen=397 new-ctb
:public key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: B56C20316D6E8279
# off=400 ctb=cd tag=13 hlen=2 plen=24 new-ctb
:user ID packet: "zunda <zundan@gmail.com>"
# off=426 ctb=c2 tag=2 hlen=3 plen=532 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1615012817, md5len 0, sigclass 0x13
	digest algo 10, begin of digest 3c 74
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-03-06)
	hashed subpkt 20 len 62 (notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=961 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1614578740, md5len 0, sigclass 0x13
	digest algo 10, begin of digest b8 7f
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-03-01)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3071 bits]
# off=1432 ctb=c2 tag=2 hlen=3 plen=549 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1614578392, md5len 0, sigclass 0x13
	digest algo 10, begin of digest 25 fa
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-03-01)
	hashed subpkt 20 len 79 (notation: proof@metacode.biz=https://twitter.com/zundan/status/1366266732046770176)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=1984 ctb=c2 tag=2 hlen=3 plen=532 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1613530821, md5len 0, sigclass 0x13
	digest algo 10, begin of digest 95 3a
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2021-02-17)
	hashed subpkt 20 len 62 (notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=2519 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x13
	digest algo 10, begin of digest c9 94
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=2990 ctb=ce tag=14 hlen=3 plen=397 new-ctb
:public sub key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: 164F21FF001C8CD1
# off=3390 ctb=c2 tag=2 hlen=3 plen=444 new-ctb
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x18
	digest algo 10, begin of digest 1b 4a
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 0C)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3065 bits]

パケット自体には違いは見られない

--- alive.txt	2021-03-05 21:02:27.513472583 -1000
+++ dead.txt	2021-03-05 21:02:44.001090108 -1000
@@ -1,7 +1,7 @@
-# off=426 ctb=c2 tag=2 hlen=3 plen=532 new-ctb
+# off=1984 ctb=c2 tag=2 hlen=3 plen=532 new-ctb
 :signature packet: algo 1, keyid B56C20316D6E8279
-	version 4, created 1615012817, md5len 0, sigclass 0x13
-	digest algo 10, begin of digest 3c 74
+	version 4, created 1613530821, md5len 0, sigclass 0x13
+	digest algo 10, begin of digest 95 3a
 	hashed subpkt 27 len 1 (key flags: 03)
 	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
 	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
@@ -10,7 +10,7 @@
 	hashed subpkt 30 len 1 (features: 01)
 	hashed subpkt 23 len 1 (keyserver preferences: 80)
 	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
-	hashed subpkt 2 len 4 (sig created 2021-03-06)
+	hashed subpkt 2 len 4 (sig created 2021-02-17)
 	hashed subpkt 20 len 62 (notation: proof@metacode.biz=https://mastodon.zunda.ninja/@zundan)
 	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
 	data: [3072 bits]

追加前の自己署名の1個目との比較。サブパケットの順序は違うが本質的な違いは見られないようだ。

--- without-notation-1.txt	2021-03-05 21:06:26.978442874 -1000
+++ with-notation.txt	2021-03-05 21:05:36.540133546 -1000
@@ -1,7 +1,9 @@
-# off=426 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
+# off=2519 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
 :signature packet: algo 1, keyid B56C20316D6E8279
-	version 4, created 1614578740, md5len 0, sigclass 0x13
-	digest algo 10, begin of digest b8 7f
+	version 4, created 1592976417, md5len 0, sigclass 0x13
+	digest algo 10, begin of digest c9 94
+	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
+	hashed subpkt 2 len 4 (sig created 2020-06-24)
 	hashed subpkt 27 len 1 (key flags: 03)
 	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
 	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
@@ -9,7 +11,5 @@
 	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
 	hashed subpkt 30 len 1 (features: 01)
 	hashed subpkt 23 len 1 (keyserver preferences: 80)
-	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
-	hashed subpkt 2 len 4 (sig created 2021-03-01)
 	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
-	data: [3071 bits]
+	data: [3072 bits]

追加前の自己署名の2個目との比較。同じ。

$ diff -u without-notation-2.txt with-notation.txt 
--- without-notation-2.txt	2021-03-05 21:06:52.973541138 -1000
+++ with-notation.txt	2021-03-05 21:05:36.540133546 -1000
@@ -1,4 +1,4 @@
-# off=1984 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
+# off=2519 ctb=c2 tag=2 hlen=3 plen=468 new-ctb
 :signature packet: algo 1, keyid B56C20316D6E8279
 	version 4, created 1592976417, md5len 0, sigclass 0x13
 	digest algo 10, begin of digest c9 94

notation追加前の1個目の自己署名にnotationの削除に関して本質的な情報があるのだろうか。

キーサーバーからの公開鍵のダウンロード

別のマシンで試してみる。

$ gpg -vvv --recv-keys F60960D80B224382CA8D831CB56C20316D6E8279
gpg: using character set 'utf-8'
gpg: keyserver receive failed: General error

あれれ?

$ gpg --refresh-keys
gpg: refreshing 5 keys from hkps://keys.openpgp.org
gpg: keyserver refresh failed: General error

おやや?

ローカルの鍵との間で解決できない矛盾があるのだろうか。

$ gpg --edit-key F60960D80B224382CA8D831CB56C20316D6E8279
gpg (GnuPG/MacGPG2) 2.2.24; Copyright (C) 2020 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Secret key is available.

sec  rsa3072/B56C20316D6E8279
     created: 2020-06-24  expires: 2022-06-24  usage: SC
     card-no: 0006 ********
     trust: ultimate      validity: ultimate
sub  rsa3072/164F21FF001C8CD1
     created: 2020-06-24  expires: 2022-06-24  usage: E
[ultimate] (1). zunda <zundan@gmail.com>

gpg> showpref
[ultimate] (1). zunda <zundan@gmail.com>
     Cipher: AES256, AES192, AES, 3DES
     AEAD:
     Digest: SHA512, SHA384, SHA256, SHA224, SHA1
     Compression: ZLIB, BZIP2, ZIP, Uncompressed
     Features: MDC, AEAD, Keyserver no-modify

gpg> quit
$ gpg --export --armor F60960D80B224382CA8D831CB56C20316D6E8279
-----BEGIN PGP PUBLIC KEY BLOCK-----
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=ELpI
-----END PGP PUBLIC KEY BLOCK-----
$ gpg --export --armor F60960D80B224382CA8D831CB56C20316D6E8279 | gpg --list-packets
# off=0 ctb=99 tag=6 hlen=3 plen=397
:public key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: B56C20316D6E8279
# off=400 ctb=b4 tag=13 hlen=2 plen=24
:user ID packet: "zunda <zundan@gmail.com>"
# off=426 ctb=89 tag=2 hlen=3 plen=468
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x13
	digest algo 10, begin of digest c9 94
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (keyserver preferences: 80)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=897 ctb=b9 tag=14 hlen=3 plen=397
:public sub key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: 164F21FF001C8CD1
# off=1297 ctb=89 tag=2 hlen=3 plen=444
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x18
	digest algo 10, begin of digest 1b 4a
	hashed subpkt 33 len 21 (issuer fpr v4 F60960D80B224382CA8D831CB56C20316D6E8279)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 0C)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3065 bits]

YubiKeyが必要なのかもしれない…YubiKeyを挿入してもだめかあ。

デバグしながら。

$ cat .gnupg/gpg.conf
auto-key-retrieve
no-emit-version
verbose
debug ipc
log-file /tmp/gpg.log
$ gpg --recv-keys F60960D80B224382CA8D831CB56C20316D6E8279
gpg: enabled debug flags: ipc
gpg: DBG: chan_3 <- # Home: /Users/zunda/.gnupg
gpg: DBG: chan_3 <- # Config: /Users/zunda/.gnupg/dirmngr.conf
gpg: DBG: chan_3 <- OK Dirmngr 2.2.24 at your service
gpg: DBG: connection to the dirmngr established
gpg: DBG: chan_3 -> GETINFO version
gpg: DBG: chan_3 <- D 2.2.24
gpg: DBG: chan_3 <- OK
gpg: DBG: chan_3 -> KS_GET -- 0xF60960D80B224382CA8D831CB56C20316D6E8279
gpg: DBG: chan_3 <- ERR 1 General error <Unspecified source>
gpg: keyserver receive failed: General error
gpg: DBG: chan_3 -> BYE
gpg: secmem usage: 0/32768 bytes in 0 blocks

ログファイルはみつけられなかった。Unspecifeid source?

$ gpg -vvv --recv-keys --keyserver hkps://keys.openpgp.org F60960D80B224382CA8D831CB56C20316D6E8279
gpg: using character set 'utf-8'
gpg: enabled debug flags: ipc
gpg: DBG: chan_3 <- # Home: /Users/zunda/.gnupg
gpg: DBG: chan_3 <- # Config: /Users/zunda/.gnupg/dirmngr.conf
gpg: DBG: chan_3 <- OK Dirmngr 2.2.24 at your service
gpg: DBG: connection to the dirmngr established
gpg: DBG: chan_3 -> GETINFO version
gpg: DBG: chan_3 <- D 2.2.24
gpg: DBG: chan_3 <- OK
gpg: DBG: chan_3 -> KEYSERVER --clear hkps://keys.openpgp.org
gpg: DBG: chan_3 <- OK
gpg: DBG: chan_3 -> KS
_GET -- 0xF60960D80B224382CA8D831CB56C20316D6E8279
gpg: DBG: chan_3 <- ERR 1 General error <Unspecified source>
gpg: keyserver receive failed: General error
gpg: DBG: chan_3 -> BYE
gpg: secmem usage: 0/32768 bytes in 0 blocks

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860352
$ gpg-connect-agent --dirmngr 'keyserver --hosttable' /bye
S # hosttable (idx, ipv6, ipv4, dead, name, time):
S #   0 6 4   keys.openpgp.org ([2a00:c6c0:0:154:1::1])
OK

IPv6ではつないでないのにな。

$ killall dirmngr
$ gpg-connect-agent --dirmngr 'keyserver --hosttable' /bye
gpg-connect-agent: no running Dirmngr - starting '/usr/local/MacGPG2/bin/dirmngr'
gpg-connect-agent: waiting for the dirmngr to come up ... (5s)
gpg-connect-agent: connection to dirmngr established
S # hosttable (idx, ipv6, ipv4, dead, name, time):
OK
$ gpg --recv-keys F60960D80B224382CA8D831CB56C20316D6E8279
gpg: keyserver receive failed: General error
$ gpg-connect-agent --dirmngr 'keyserver --hosttable' /bye
S # hosttable (idx, ipv6, ipv4, dead, name, time):
S #   0 6 4   keys.openpgp.org ([2a00:c6c0:0:154:1::1])
OK

ふむん。

$ dig keys.openpgp.org

; <<>> DiG 9.10.6 <<>> keys.openpgp.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43315
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;keys.openpgp.org.		IN	A

;; ANSWER SECTION:
keys.openpgp.org.	3599	IN	A	37.218.245.50

;; Query time: 150 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Mar 05 22:16:21 HST 2021
;; MSG SIZE  rcvd: 61

IPv6を有効にしても解決しない。

手元の鍵の問題ではないことは確認できた

$ mv .gnupg .gnupg.error
$ gpg --recv-keys F60960D80B224382CA8D831CB56C20316D6E8279
gpg: directory '/Users/zunda/.gnupg' created
gpg: keybox '/Users/zunda/.gnupg/pubring.kbx' created
gpg: keyserver receive failed: General error

もいっちょ別のマシンンで

$ gpg2 --export --armor F60960D80B224382CA8D831CB56C20316D6E8279 | gpg2 --list-packets
# off=0 ctb=99 tag=6 hlen=3 plen=397
:public key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: B56C20316D6E8279
# off=400 ctb=b4 tag=13 hlen=2 plen=24
:user ID packet: "zunda <zundan@gmail.com>"
# off=426 ctb=89 tag=2 hlen=3 plen=468
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x13
	digest algo 10, begin of digest c9 94
	hashed subpkt 33 len 21 (?)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 03)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	hashed subpkt 11 len 4 (pref-sym-algos: 9 8 7 2)
	hashed subpkt 21 len 5 (pref-hash-algos: 10 9 8 11 2)
	hashed subpkt 22 len 3 (pref-zip-algos: 2 3 1)
	hashed subpkt 30 len 1 (features: 01)
	hashed subpkt 23 len 1 (key server preferences: 80)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3072 bits]
# off=897 ctb=b9 tag=14 hlen=3 plen=397
:public sub key packet:
	version 4, algo 1, created 1592976417, expires 0
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	keyid: 164F21FF001C8CD1
# off=1297 ctb=89 tag=2 hlen=3 plen=444
:signature packet: algo 1, keyid B56C20316D6E8279
	version 4, created 1592976417, md5len 0, sigclass 0x18
	digest algo 10, begin of digest 1b 4a
	hashed subpkt 33 len 21 (?)
	hashed subpkt 2 len 4 (sig created 2020-06-24)
	hashed subpkt 27 len 1 (key flags: 0C)
	hashed subpkt 9 len 4 (key expires after 2y0d0h0m)
	subpkt 16 len 8 (issuer key ID B56C20316D6E8279)
	data: [3065 bits]
$ gpg2 --recv-keys F60960D80B224382CA8D831CB56C20316D6E8279
gpg: keyserver receive failed: No keyserver available
$ gpg2 --recv-keys --keyserver hkps://keys.openpgp.org F60960D80B224382CA8D831CB56C20316D6E8279
gpg: keyserver receive failed: General error

おおっと。

$ mv .gnupg .gnupg.error
$ gpg2 --import Downloads/F60960D80B224382CA8D831CB56C20316D6E8279.asc 
gpg: /home/zunda/.gnupg/trustdb.gpg: trustdb created
gpg: key 6D6E8279: public key "zunda <zundan@gmail.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1
$ gpg2 --refresh-keys
gpg: refreshing 1 key from hkp://keys.gnupg.net
gpg: keyserver refresh failed: No data
$ gpg2 --recv-keys --keyserver hkps://keys.openpgp.org F60960D80B224382CA8D831CB56C20316D6E8279
gpg: keyserver receive failed: General error

もう一度--recv-keysを試す

別のマシンでうまくいったのでGeneral errorで失敗するのは鍵の問題ではないだろう。

Ubuntu 18.04。

$ gpg --version
gpg (GnuPG) 2.2.4
libgcrypt 1.8.1
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Home: /home/zunda/.gnupg
Supported algorithms:
Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
        CAMELLIA128, CAMELLIA192, CAMELLIA256
Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2
$ gpg --list-sigs F60960D80B224382CA8D831CB56C20316D6E8279
gpg: error reading key: No public key
$ cat t.asc
-----BEGIN PGP PUBLIC KEY BLOCK-----
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=ELpI
-----END PGP PUBLIC KEY BLOCK-----
$ gpg --import t.asc
gpg: key B56C20316D6E8279: public key "zunda <zundan@gmail.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1
$ gpg --recv-keys --keyserver hkps://keys.openpgp.org F60960D80B224382CA8D831CB56C20316D6E8279
gpg: key B56C20316D6E8279: "zunda <zundan@gmail.com>" 4 new signatures
gpg: Total number processed: 1
gpg:         new signatures: 4
このスクラップは2021/03/12にクローズされました
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