![]() ![]() You can still gain many of the benefits of code signing on your own computers by generating your own codesigning certificate. Some online services offer extremely cheap codesigning certificates, but be aware that many machines may be unable to verify the digital signatures created by those certificates. ![]() By using an Authenticode codesigning certificate from a reputable certification authority (such as VeriSign or Thawte), you can be sure that all users will be able to verify the signature on your script. Most certification authorities provide Authenticode codesigning certificates for a fee. To sign a file, the SetAuthenticodeSignature cmdlet requires that you provide it with a valid codesigning certificate. While the SetAuthenticodeSignature cmdlet is primarily designed to support scripts and formatting files, it also supports DLLs and other standard Windows executable file types. ![]() Because of that, techniques you may already know for signing files and working with their signatures continue to work with PowerShell scripts and formatting files. When it comes to the signing of scripts and formatting files, PowerShell participates in the standard Windows Authenticode infrastructure. Please see "gethelp about_signing" for more details. The script will not execute on the system. The contents of file C:\temp\test.ps1 may have been tampered because the hash of the file does not match the hash stored in the digital signature. If you try to load a file that has been tampered with, PowerShell provides the following error message:įile C:\temp\test.ps1 cannot be loaded. This signature verifies that the file came from you and also ensures that nobody can tamper with the content in the file without detection. When you sign a script or formatting file, PowerShell appends your digital signature to the end of that file. Signing a script or formatting file provides you and your customers with two primary benefits: publisher identification and file integrity. ![]() $cert = cert:\CurrentUser\My CodeSigning) SetAuthenticodeSignature file.ps1 $certĪlternatively, you may also use other traditional applications (such as signtool.exe) to sign PowerShell. To sign the script with your standard codesigning certificate, use the SetAuthenticodeSignature cmdlet: You want to sign a PowerShell script so that it may be run on systems that have their execution policy set to require signed scripts. ![]()
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