husi-signing-cert.pem is the certificate the Windows releases are signed with. It is published
here so anyone can check that a downloaded build really came from this project.
It is a self-signed certificate, not one issued by a commercial CA. Windows will still warn about an unknown publisher, and that is expected — SmartScreen was never the point.
SHA-256 E0:10:8A:03:F1:81:C1:D7:E1:61:C6:E8:B9:94:BC:46:B3:EC:BA:44:54:D8:70:BD:A9:A7:A7:7E:B7:5F:05:E2
SHA-1 B4:1F:B3:8C:6B:08:4A:52:88:07:21:B9:CF:79:B6:94:E0:2F:17:CC
Subject CN=husi
Valid 2026-08-14 .. 2036-08-11
Windows shows the SHA-1 value: it is the "Thumbprint" in the file properties Digital Signatures tab, and what PowerShell reports.
PowerShell:
(Get-AuthenticodeSignature .\husi-core.exe).SignerCertificate.ThumbprintLinux or macOS, with osslsigncode:
osslsigncode verify -CAfile release/windows/husi-signing-cert.pem husi-core.exe
Every signed payload in a release — the launcher, husi-core.exe, the libcronet.dll beside it and
the installer — carries this same certificate. libcronet.dll is the prebuilt Cronet that SagerNet's cronet-go
publishes unsigned; the signature only says this project shipped it.
A matching fingerprint means the file was signed with the private key behind this certificate. A mismatch means it was not, and the build should not be trusted.
Nothing in husi checks this certificate at runtime. Comparing against the fingerprints above is what ties a build to this project, and that comparison is yours to make.
See the Windows signing entry in AGENTS.md. The private key lives outside this
repository; release/windows/codesign.sh reads it from WINDOWS_SIGNING_P12.