gpg: [don't know]: invalid packet (ctb=00)

[GnuPG - User mailing list]

Hi

We experience a very weird problem when the following command
is executed on macos using gpg 2.2.27 (installed by homebrew tool).

echo "xxxxxxx" | gpg --batch --yes --passphrase-fd 0 --local-user 4BD5F787F27F97744BC09E019C1CA69653E98E56 --armor --detach-sign --no-default-keyring --secret-keyring secring.gpg --keyring pubring.gpg --homedir 50_ReleaseBOMUpstream/.gnupg -output dummy.txt.asc dummy.txt

gpg: starting migration from earlier GnuPG versions
gpg: porting secret keys from '/Users/cmoullia/.jenkins/workspace/50_ReleaseBOMUpstream/.gnupg/secring.gpg' to gpg-agent
gpg: [don't know]: invalid packet (ctb=00)
gpg: read_block: read error: Invalid packet
gpg: import from '/Users/cmoullia/.jenkins/workspace/50_ReleaseBOMUpstream/.gnupg/secring.gpg' failed: Invalid keyring
gpg: skipped "4BD5F787F27F97744BC09E019C1CA69653E98E56": No secret key
gpg: signing failed: No secret key

Do you know what is the problem ("gpg: [don't know]: invalid packet (ctb=00)")and how to fix it ?

Cheers

Charles Moulliard

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[Ángel]

On 2021-02-11 at 18:24 +0100, Charles Moulliard via Gnupg-users wrote:

> Hi
>
> We experience a very weird problem when the following command
> is executed on macos using gpg 2.2.27 (installed by homebrew tool).
>
> (...)
>
> Do you know what is the problem ("gpg: [don't know]: invalid packet
> (ctb=00)")and how to fix it ?
>
> Cheers
>
> Charles Moulliard

That secring.gpg file is corrupt.

It's trying to automatically migrate /Users/cmoullia/.jenkins/
workspace/50_ReleaseBOMUpstream/.gnupg/secring.gpg to the new secret
keyring format, but in doing so it is finding a NUL byte (at the
beginning of the file, presumably), where it was expecting a secret
key.

Best regards




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[GnuPG - User mailing list]

As the file was present on the filesystem, I suspect another error then. Anyway, GPG should report a more user friendly message explaining what we should investigate to fix it.

On Tue, Mar 2, 2021 at 11:20 PM Ángel <[hidden email]> wrote:

On 2021-02-11 at 18:24 +0100, Charles Moulliard via Gnupg-users wrote:
> Hi
>
> We experience a very weird problem when the following command
> is executed on macos using gpg 2.2.27 (installed by homebrew tool).
>
> (...)
>
> Do you know what is the problem ("gpg: [don't know]: invalid packet
> (ctb=00)")and how to fix it ?
>
> Cheers
>
> Charles Moulliard

That secring.gpg file is corrupt.

It's trying to automatically migrate /Users/cmoullia/.jenkins/
workspace/50_ReleaseBOMUpstream/.gnupg/secring.gpg to the new secret
keyring format, but in doing so it is finding a NUL byte (at the
beginning of the file, presumably), where it was expecting a secret
key.

Best regards




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[Ángel]

On 2021-03-03 at 09:17 +0100, Charles Moulliard via Gnupg-users wrote:
> As the file was present on the filesystem, I suspect another error
> then. Anyway, GPG should report a more user friendly message
> explaining what we should investigate to fix it.

Of course the file is there. The problem is with its contents.
Run
  gpg --list-packets secring.gpg

that should begin with
# off=0 ctb=95 tag=5 hlen=3 plen=...
:secret key packet:
...

but it will probably show you
 gpg: [don't know]: invalid packet (ctb=00)

either due to nul bytes at the beginning, or after some valid pgp
packets.


Cheers



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