PackageDigitalSignatureManager.IsSigned 属性
定义
重要
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获取一个值，该值指示包是否包含任何签名。
public:
property bool IsSigned { bool get(); };public bool IsSigned { get; }member this.IsSigned : boolPublic ReadOnly Property IsSigned As Boolean属性值
如果包中包含签名，则为 true，否则为 false。
示例
以下示例演示如何使用 IsSigned 属性来确定包是否包含数字签名。
// ------------------------ 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()
' ------------------------ 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 Shared Function ValidateSignatures(ByVal package As Package) As Boolean
If package Is Nothing Then
Throw New ArgumentNullException("ValidateSignatures(package)")
End If
' Create a PackageDigitalSignatureManager for the given Package.
Dim dsm As New PackageDigitalSignatureManager(package)
' Check to see if the package contains any signatures.
If Not dsm.IsSigned Then
Return False
End If
' The package is not signed.
' Verify that all signatures are valid.
Dim result As VerifyResult = dsm.VerifySignatures(False)
If result <> VerifyResult.Success Then
Return False
End If
' One or more digital signatures are invalid.
' else if (result == VerifyResult.Success)
' All signatures are valid.
Return True
End Function
' end:ValidateSignatures()
注解
属性 IsSigned 不执行签名验证。 如果签名存在并且 IsSigned 为 true，则一个或多个签名可能无效。 调用 VerifySignatures 以确认签名有效且未更改。
