Fix certstore windows cmsg type error when building using go v1.18

[ElMostafaIdrassi]

When trying to use certstore in a project that makes use of go v1.18+, the following error occurs :

github.com\github\[email protected]\certstore\certstore_windows.go:640:29: cannot convert cmsg (variable of type *_Ctype_char) to type _Ctype_HANDLE

From this golang issue, it appears that go 1.18 has added some safety checks which reject unsafe conversions, resulting in such errors.

A simple fix is to cast the cms variable into an unsafe.Pointer before casting it to a C.HLOCAL.
This change was tested on Windows by building smimesign locally and running the test suite.

Closes #107

Signed-off-by: El Mostafa IDRASSI [email protected]

[lgarron]

Thanks for this PR!

It looks fairly straightforward — we'll have to verify and debug this a bit, but looks like an appropriate fix.

[pc-ahrens]

Thanks for this PR!

It looks fairly straightforward — we'll have to verify and debug this a bit, but looks like an appropriate fix.

This pull requests also fixes an issue we have, that our signed commits cannot be verified with git verify-commit <commitid>.
A misleading error message is shown: failed to verify signature: x509: certificate signed by unknown authority

Is there are a roadmap or release date when a new release with this fix will be available?

[naggie]

I can confirm this is an issue on go version go1.20.8 linux/amd64

[vcsjones]

Closing and re-opening to jog CI.

[vcsjones]

This pull request was cherry-picked in pull request #149. Thank you for your contribution! I am going to close this pull request since your commits are now merged.