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PackageDigitalSignatureManager.VerifySignatures Method

Verifies the signatures on all signed parts within the package.

Namespace: System.IO.Packaging
Assembly: WindowsBase (in windowsbase.dll)

public VerifyResult VerifySignatures (
	bool exitOnFailure
)
public VerifyResult VerifySignatures (
	boolean exitOnFailure
)
public function VerifySignatures (
	exitOnFailure : boolean
) : VerifyResult
You cannot use methods in XAML.

Parameters

exitOnFailure

true to exit on first failure; otherwise, false to continue and check all signatures.

Return Value

Success (value 0) if all signatures are verified successfully; otherwise, an enumeration that identifies the error.

This method verifies only the digital signatures; it does not verify the related X.509 certificates. The VerifyCertificate method can be used to verify the X.509 certificates.

The following example shows how to use this method to validate all signed parts within a package. For the complete sample, see Creating a Package with a Digital Signature Sample.

// ------------------------ ValidateSignatures ------------------------
/// <summary>
///   Validates all the digital signatures of a given package.</summary>
/// <param name="package">
///   The package for validating digital signatures.</param>
/// <returns>
///   true if all digital signatures are valid; otherwise false if the
///   package is unsigned or any of the signatures are invalid.</returns>
private static bool ValidateSignatures(Package package)
{
    if (package == null)
        throw new ArgumentNullException("ValidateSignatures(package)");

    // Create a PackageDigitalSignatureManager for the given Package.
    PackageDigitalSignatureManager dsm =
        new PackageDigitalSignatureManager(package);

    // Check to see if the package contains any signatures.
    if (!dsm.IsSigned)
        return false;   // The package is not signed.

    // Verify that all signatures are valid.
    VerifyResult result = dsm.VerifySignatures(false);
    if (result != VerifyResult.Success)
        return false;   // One or more digital signatures are invalid.

    // else if (result == VerifyResult.Success)
    return true;        // All signatures are valid.

}// end:ValidateSignatures()

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0
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