CkJava Requires Chilkat v11.7.0+

Authenticode Sign a PowerShell Script (.ps1, .psm1, .psd1)

See more Code Signing Examples

Demonstrates how to Authenticode sign a PowerShell script. PowerShell scripts (.ps1), modules (.psm1) and data files (.psd1) can be signed starting in Chilkat v11.7.0. The signature is appended to the file as a comment block, and the file keeps its text encoding. CkJava

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  Signing PowerShell files requires Chilkat v11.7.0 or later.
    //  The same code signs a script (.ps1), a module (.psm1), or a data file (.psd1).

    //  Load the code signing certificate.  It must have access to its private key.
    CkCert cert = new CkCert();
    success = cert.LoadPfxFile("C:/someDir/myCodeSigningCert.pfx","pfx password");
    if (success == false) {
        System.out.println(cert.lastErrorText());
        return;
        }

    //  Sign with SHA256, and ask a timestamp authority for a timestamp.  A timestamp lets the
    //  signature continue to validate after the code signing certificate has expired.
    //  
    //  {
    //    "hashAlg": "sha256",
    //    "timestampToken": {
    //      "enabled": true,
    //      "tsaUrl": "http://timestamp.digicert.com",
    //      "requestTsaCert": true,
    //      "hashAlg": "sha256"
    //    }
    //  }
    CkJsonObject json = new CkJsonObject();
    json.UpdateString("hashAlg","sha256");
    json.UpdateBool("timestampToken.enabled",true);
    json.UpdateString("timestampToken.tsaUrl","http://timestamp.digicert.com");
    json.UpdateBool("timestampToken.requestTsaCert",true);
    json.UpdateString("timestampToken.hashAlg","sha256");

    String scriptPath = "C:/someDir/Deploy.ps1";

    CkCodeSign signer = new CkCodeSign();

    //  The script is modified in place.  The signature is appended to the end of the file as a comment block:
    //  
    //    # SIG # Begin signature block
    //    # MIIoKgYJKoZIhvcNAQcCoIIoGzCCKBcCAQExDzANBglghkgBZQMEAgEFADB5Bgor
    //    # ...
    //    # SIG # End signature block
    //  
    //  The text encoding of the file (UTF-8, UTF-8 with BOM, or UTF-16) is kept.
    //  If the script is already signed, the new signature block replaces the existing one.
    success = signer.AddSignature(scriptPath,cert,json);
    if (success == false) {
        System.out.println(signer.lastErrorText());
        return;
        }

    System.out.println("Signed the PowerShell script.");

    //  Verify the signature that was just added.
    //  Any change made to the script after it is signed, even to a comment, invalidates the signature.
    CkJsonObject sigInfo = new CkJsonObject();
    boolean valid = signer.VerifySignature(scriptPath,sigInfo);
    if (valid == false) {
        System.out.println(signer.lastErrorText());
        return;
        }

    System.out.println("The signature is valid.");
  }
}