查看 OpenPGP 关键数据时，您可以获得几个详细级别：基本摘要、此摘要的机器可读输出或单个 OpenPGP 数据包的详细（且非常技术性）列表。

基本关键信息

对于 OpenPGP 密钥文件的短暂峰值，您可以通过 STDIN 将文件名作为参数或管道传递给密钥数据。如果没有传递任何命令，GnuPG
会尝试猜测你想要做什么——对于关键数据，这是在关键上打印一个摘要：

$ gpg a4ff2279.asc
gpg: WARNING: no command supplied.  Trying to guess what you mean ...
pub   rsa8192 2012-12-25 [SC]
      0D69E11F12BDBA077B3726AB4E1F799AA4FF2279
uid           Jens Erat (born 1988-01-19 in Stuttgart, Germany)
uid           Jens Erat <jens.erat@fsfe.org>
uid           Jens Erat <jens.erat@uni-konstanz.de>
uid           Jens Erat <jabber@jenserat.de>
uid           Jens Erat <email@jenserat.de>
uid           [jpeg image of size 12899]
sub   rsa4096 2012-12-26 [E] [revoked: 2014-03-26]
sub   rsa4096 2012-12-26 [S] [revoked: 2014-03-26]
sub   rsa2048 2013-01-23 [S] [expires: 2023-01-21]
sub   rsa2048 2013-01-23 [E] [expires: 2023-01-21]
sub   rsa4096 2014-03-26 [S] [expires: 2020-09-03]
sub   rsa4096 2014-03-26 [E] [expires: 2020-09-03]
sub   rsa4096 2014-11-22 [A] [revoked: 2016-03-01]
sub   rsa4096 2016-02-24 [A] [expires: 2020-02-23]

通过设置--keyid-format 0xlong，打印长密钥
ID而不是不安全的短密钥
ID：

$ gpg a4ff2279.asc                                                                 
gpg: WARNING: no command supplied.  Trying to guess what you mean ...
pub   rsa8192/0x4E1F799AA4FF2279 2012-12-25 [SC]
      0D69E11F12BDBA077B3726AB4E1F799AA4FF2279
uid                             Jens Erat (born 1988-01-19 in Stuttgart, Germany)
uid                             Jens Erat <jens.erat@fsfe.org>
uid                             Jens Erat <jens.erat@uni-konstanz.de>
uid                             Jens Erat <jabber@jenserat.de>
uid                             Jens Erat <email@jenserat.de>
uid                             [jpeg image of size 12899]
sub   rsa4096/0x0F3ED8E6759A536E 2012-12-26 [E] [revoked: 2014-03-26]
sub   rsa4096/0x2D6761A7CC85941A 2012-12-26 [S] [revoked: 2014-03-26]
sub   rsa2048/0x9FF7E53ACB4BD3EE 2013-01-23 [S] [expires: 2023-01-21]
sub   rsa2048/0x5C88F5D83E2554DF 2013-01-23 [E] [expires: 2023-01-21]
sub   rsa4096/0x8E78E44DFB1B55E9 2014-03-26 [S] [expires: 2020-09-03]
sub   rsa4096/0xCC73B287A4388025 2014-03-26 [E] [expires: 2020-09-03]
sub   rsa4096/0x382D23D4C9773A5C 2014-11-22 [A] [revoked: 2016-03-01]
sub   rsa4096/0xFF37A70EDCBB4926 2016-02-24 [A] [expires: 2020-02-23]
pub   rsa1024/0x7F60B22EA4FF2279 2014-06-16 [SCEA] [revoked: 2016-08-16]

提供-v或-vv什至会添加更多信息。不过，在这种情况下，我更喜欢打印包裹的详细信息（见下文）。

机器可读的输出

GnuPG 还有一个冒号分隔的输出格式，易于解析，格式稳定。该格式记录在
GnuPGdoc/DETAILS文件中。接收这种格式的选项是--with- colons.

$ gpg --with-colons a4ff2279.asc
gpg: WARNING: no command supplied.  Trying to guess what you mean ...
pub:-:8192:1:4E1F799AA4FF2279:1356475387:::-:
uid:::::::::Jens Erat (born 1988-01-19 in Stuttgart, Germany):
uid:::::::::Jens Erat <jens.erat@fsfe.org>:
uid:::::::::Jens Erat <jens.erat@uni-konstanz.de>:
uid:::::::::Jens Erat <jabber@jenserat.de>:
uid:::::::::Jens Erat <email@jenserat.de>:
uat:::::::::1 12921:
sub:-:4096:1:0F3ED8E6759A536E:1356517233:1482747633:::
sub:-:4096:1:2D6761A7CC85941A:1356517456:1482747856:::
sub:-:2048:1:9FF7E53ACB4BD3EE:1358985314:1674345314:::
sub:-:2048:1:5C88F5D83E2554DF:1358985467:1674345467:::
sub:-:4096:1:8E78E44DFB1B55E9:1395870592:1599164118:::
sub:-:4096:1:CC73B287A4388025:1395870720:1599164118:::
sub:-:4096:1:382D23D4C9773A5C:1416680427:1479752427:::
sub:-:4096:1:FF37A70EDCBB4926:1456322829:1582466829:::

从 GnuPG 2.1.23 开始，gpg: WARNING: no command supplied. Trying to guess what you mean ...可以通过将--import-options show- only选项与--import命令一起使用来省略警告（当然，这也可以不--with-colons使用 ）：

$ gpg --with-colons --import-options show-only --import a4ff2279
[snip]

对于旧版本：警告消息打印在 STDERR 上，因此您只需阅读 STDIN 即可将关键信息与警告分开。

技术细节：列出 OpenPGP 数据包

无需安装任何其他软件包，您就可以使用 gpg --list-packets [file] 查看文件中包含的 OpenPGP 数据包的信息。

$ gpg --list-packets a4ff2279.asc
:public key packet:
    version 4, algo 1, created 1356475387, expires 0
    pkey[0]: [8192 bits]
    pkey[1]: [17 bits]
    keyid: 4E1F799AA4FF2279
:user ID packet: "Jens Erat (born 1988-01-19 in Stuttgart, Germany)"
:signature packet: algo 1, keyid 4E1F799AA4FF2279
    version 4, created 1356516623, md5len 0, sigclass 0x13
    digest algo 2, begin of digest 18 46
    hashed subpkt 27 len 1 (key flags: 03)
[snip]

该 pgpdump [file] 工具的工作方式类似于gpg --list- packets并提供类似的输出，但将所有这些算法标识符解析为可读表示。它可能适用于所有相关的发行版（在 Debian
衍生产品上，该软件包被称为pgpdump工具本身）。

$ pgpdump a4ff2279.asc
Old: Public Key Packet(tag 6)(1037 bytes)
    Ver 4 - new
    Public key creation time - Tue Dec 25 23:43:07 CET 2012
    Pub alg - RSA Encrypt or Sign(pub 1)
    RSA n(8192 bits) - ...
    RSA e(17 bits) - ...
Old: User ID Packet(tag 13)(49 bytes)
    User ID - Jens Erat (born 1988-01-19 in Stuttgart, Germany)
Old: Signature Packet(tag 2)(1083 bytes)
    Ver 4 - new
    Sig type - Positive certification of a User ID and Public Key packet(0x13).
    Pub alg - RSA Encrypt or Sign(pub 1)
    Hash alg - SHA1(hash 2)
    Hashed Sub: key flags(sub 27)(1 bytes)
[snip]