Erlang - 导入 GPG 公钥

Question

我正在尝试在 Erlang 中做一些与公钥相关的事情，它们要求我跟踪公钥。根据 this page，我应该能够使用

file:read_file/1

和

public_key:decode_pem/1

导入 PEM 格式密钥。问题是，当我尝试导入 GPG 公钥时，我没有得到结果。

我有一个名为

inaimathi.pubkey

的文件，其中包含以下内容：

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.11 (GNU/Linux)

mQINBE9NBIQBEADMSzN6b0FaPP0rGiLDWKfH4ehN66Z0SAIynXm6lBHjmO69pNsm
iIe4p1X9aXhr7EgEZKdbqevfXW7NuA/oL7Rbt+tzBT5nS2cYSHoZhUC/onVhJxUb
drCR9NsBDZc1wZs+b95K3vWW91wMPYs4tn71DeeNgUVCcZOGofWltI7+etTVVIyG
zMEW4lOiEwBgLee+5u3XyGsBbyhtWnbp8ZMewiXjo14w0UCMEQxvf55NjggAO/vR
C+Czz5FQ7m9AnZwqIZJfaAw+aM81lmcXRZenGZ/H25H6WLq2DrVXnRjEyUvK+juj
K6rTHcot6K4Cgvo3P47uZcze92c4KaI22jTePRB1qov8ygAQw8BPsaZ+cA3AQ2Zv
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reeTdrYXeco27kp/x+nDSWzqy0MrSAAD19xCK1w8Eiwc9MmjAAX1yarQzUy/ICey
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0mOMv8lXBMYZs8NTrMJl2XHfi3egu8Ti14VChCklnWe95sZvKrk9/3BYxwARAQAB
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CQUCT00EhAIbDAAKCRDlo9AP+vpofVp4D/9WqB4h9T5kGLBvuGUebjSqBuv6XfUd
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aeryKzy3TWikj3cq8Mdj2mKqNwkn1uu89j3xvxbq6gxX7lGX8pCLS2W6a7PYDaXf
no1/C31//Shn26LD9YfzRhcA/B/uXtEST3eShM5uS2sm+oOpxpiRaBv477K2TLpn
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E+8YuCe53OAvNU0BFT8MAe/vB9kMl4N3p/3bJPuzmP4lnAGrLwzBZPkiQTNq8aj8
5NsttvIOclBY5A==
=Zqph
-----END PGP PUBLIC KEY BLOCK-----

这似乎是正确的格式，但我得到的结果是

1> {ok, GpgBin} = file:read("inaimathi.pubkey").
{ok,<<"-----BEGIN PGP PUBLIC KEY BLOCK-----\nVersion: GnuPG v1.4.11 (GNU/Linux)\n\nmQINBE9NBIQBEADMSzN6b0FaPP0rGiLDWKf"...>>}
2> public_key:pem_decode(GpgBin).
[]

根据文档，我希望它返回一个

RSAEntry

，然后我可以将其解码为公钥。通过此机制导入公钥是否需要做一些特殊的事情？ GPG 密钥实际上是有效的 PEM 文件吗？我还漏掉了什么吗？

Answer 1

ASCII-armored 和 PEM 非常相似。您只需要更改 BEGIN/END 标记，去掉 PGP 标头和校验和（校验和是最后一行

=Zqph

），然后添加 PEM 标头。所以，你必须将

inaimathi.pubkey

更改为这个文件：

-----BEGIN RSA PUBLIC KEY-----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5NsttvIOclBY5A==
-----END RSA PUBLIC KEY-----

Answer 2

GPG 和 PGP 工具按照 RFC4880 实现 OpenPGP 消息格式。

我没有运气使用任何内置的 Erlang/Elixir 工具来解码/解密以 PGP 格式导出的数据。因此，我已经部分实现了 RFC4880，以便能够加载私钥/公钥、解密加密的消息/文件以及膨胀压缩数据。 Elixir 库可在此处获取。而且本文解释了实现的所有细节并逐步介绍了 RFC4880 的一些方面。