dxX509IsUsableForDigitalSignature(TdxX509Certificate) Method

Identifies if it is possible to use a specified X.509 certificate to sign documents.

Declaration

function dxX509IsUsableForDigitalSignature(ACertificate: TdxX509Certificate): Boolean;

Parameters

Name	Type	Description
ACertificate	TdxX509Certificate	An X.509 public key certificate.

Returns

Type	Description
Boolean	True, if it is possible to use an X.509 certificate to sign documents; otherwise, False.

Remarks

Call this global function and pass a target certificate as the ACertificate parameter to identify if you can use the certificate to sign documents. The dxX509IsUsableForDigitalSignature function returns True only if the following conditions are met:

• The specified certificate has a private key.

• The certificate’s KeyUsage property value includes the kufDigitalSignature flag.

Otherwise, the dxX509IsUsableForDigitalSignature function returns False.