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Logically, it shouldn’t work if the computer is disconnected from the internet. In my experience, even with an internet connection it does not always work reliably. For more information about the portal, see the Loading a kernel module section. TRCA In the tables above, TRCA means the signature’s chain of trust must go back to a certificate in the user’s Trusted Root Certification Authorities list. As you can see in certmgr.msc, the TRCA list has certificates from several well-known companies such as a Verisign, Globalsign, Digicert, and Go Daddy.

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Microsoft’s documentation for the portal might be useful. This post about driver signing by Christoph Lüders documents his experience purchasing an EV certificate, getting an account on the portal, and going through the attestation route. The portal will only accept driver submissions from you if you sign them with an Extended Validation certificate, which is typically more expensive than a normal certificate.

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The INF DriverVer Directive is documented here on MSDN. If the DriverVer version number were important in some way, that should be documented on that page, not buried on page 11 of kmsigning.doc. In fact, the DriverVer version is optional according to that page. You can even reference multiple INF files in the CopyINF directive if you want. For both of these batch files, if you are using a cross-certificate, I recommend just putting the cross-certificate in the same directory as the batch file to make the /ac parameter simpler. You can put it in the same directory as your driver package and then double-click on it to create the security catalog and sign it.

The same subject can be found in multiple different certificates. For example, the "GlobalSign Root CA – R3" has its own root certificate as well as a cross-certificate issued by the GlobalSign Root CA, which seems to be an older and better supported authority. Some of the certificates shown in the certification path come from the file whose signature your are inspecting.

Some time-stamping servers will disobey your /td argument, so be sure to inspect your signature to make sure it uses the right digest algorithm for the timestamp. If you are using a GlobalSign certificate, I recommend using the GlobalSign timestamping server. That way, both your main signature and your timestamp signature can chain back to the same root certificate. Every root certificate that your signature relies on is a liability because it might be missing or unavailable on the user’s system. If possible, it is better to rely on just one root certificate instead of two. Note that there is no way to specify the digest algorithm when running inf2cat; it seems like CAT files always use SHA-1. However, your experience buying a certificate from them will be harder than ours, because of new code-signing security rules implemented on .

The attestation route is the new route where your driver does not have to pass any tests, but the resulting driver only works on Windows 10. Prior to Windows , you could use a cross-certificate to sign your CAT file and produce a signature that convinces Windows to load your SYS file into the kernel. This is documented very clearly in kmsigning.doc, which explains that the kernel does not have access to the Trusted Root Certification Authorities list. Microsoft publishes a complete list of the Cross-Certificates for Kernel Mode Code Signing.

  • When using one of the devices, you can interact with the Android apps on your phone from the Your Phone app on Windows 10.
  • Those settings have been moved to the Settings app.
  • The Your Phone app gets a variety of new features for some Samsung devices.
  • This is a relatively minor update but does have a few new features.

Globalsign is going above and beyond what the new rules actually require. To learn about the new rules, see the document Minimum Requirements for the Issuance and Management of Publicly-Trusted Code Signing Certificates Brother Printers Drivers for windows 7 by the Code Signing Working Group from .

Many certificates are not present in the list initially, but Window will attempt to automatically install them from the various sources when they are needed to verify a signature. To successfully release your software, you should make sure that your digital signature meets all the necessary requirements documented below. The requirements are summarized in the tables below, and then the terms in the tables are defined and explained after the tables. Each data cell of each table contains a boolean expression that combines different requirements using and (&) and or operations. I strongly suspect that this list is incomplete, so please post a comment if there is anything to add to it. You can also use a hex editor such as WinHex to examine the embedded signatures; you can easily see the names of the signer and the organizations in the certification path.

However, your signatures should keep working after the certificate expires if you make sure to use a timestamp when signing. Starting in Windows 8, all driver packages have to be signed.Unfortunately, I have not seen any official document from Microsoft about this change, even though I asked about it on StackOverflow. The name in the prompt comes from from the INF file’s DriverPackageDisplayName directive and the publisher comes from the verified signature on the CAT file. Another workaround for the user to do would be to remove the special flag in the file system that marks the file as coming from the internet. Alternatively, you could distribute the executable unsigned. When signing with signtool, you have a choice about whether to specify the timestamp server using the /t option or the /tr option. If you specify it with /t, signtool gets a timestamp from the server using a custom Microsoft protocol.

If you specify it with /tr, signtool gets a timestamp from the server using RFC3161. But these aren’t just different protocols, they also seem to affect something about the timestamp itself. Unsigned This requirement is true if the file simply has no signature. Keep in mind that the table above uses boolean expressions, so when I write "X or Y or Z" it means that if any of those three are true, then your signature will work. One way Windows can download root certificates is by connecting to Windows Update using the Internet. This is called the Microsoft Root Cerificate Program.

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