Ruby Requires Chilkat v11.7.0+

Authenticode Sign a Windows Installer Package (MSI)

See more Code Signing Examples

Demonstrates how to Authenticode sign a Windows Installer package (.msi). Signing MSI packages requires Chilkat v11.7.0 or later. The package is signed in place, and the certificate must have an RSA key: Windows does not accept the signature of an MSI that was signed with an ECDSA certificate. Ruby

require 'chilkat'

success = false

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

#  Signing a Windows Installer package (.msi) requires Chilkat v11.7.0 or later.

#  Load the code signing certificate.  It must have access to its private key.
cert = Chilkat::CkCert.new()
success = cert.LoadPfxFile("C:/someDir/myCodeSigningCert.pfx","pfx password")
if (success == false)
    print cert.lastErrorText() + "\n";
    exit
end

#  Use a certificate with an RSA key to sign an MSI.
#  Windows does not accept the signature of an MSI that was signed with an ECDSA certificate
#  (signtool verify and the Digital Signatures tab of the file's properties report it as invalid).
#  This is a limitation of signed MSI files on Windows.  It does not apply to EXE, DLL, PowerShell,
#  or VBScript files, which can be signed with either kind of certificate.
if (cert.IsRsa() == false)
    print "Use an RSA code signing certificate to sign an MSI." + "\n";
    exit
end

#  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"
#    }
#  }
json = Chilkat::CkJsonObject.new()
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")

msiPath = "C:/someDir/MyAppSetup.msi"

signer = Chilkat::CkCodeSign.new()

#  The .msi is modified in place.  The signature is stored in the package's digital signature stream.
#  If the package is already signed, the new signature replaces the existing one.
success = signer.AddSignature(msiPath,cert,json)
if (success == false)
    print signer.lastErrorText() + "\n";
    exit
end

print "Signed the MSI." + "\n";

#  Verify the signature that was just added.
sigInfo = Chilkat::CkJsonObject.new()
valid = signer.VerifySignature(msiPath,sigInfo)
if (valid == false)
    print signer.lastErrorText() + "\n";
    exit
end

print "The signature is valid." + "\n";