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(Visual FoxPro) Load Certificate from Smart Card by Key UsageSee more Certificates ExamplesYou may have a smartcard or USB token that contains only 2 certificates, one for signing, and one for authentication, and you wish to load the certificate for signing. This example demonstrates how to load the 1st certificate found on a smartcard that matches the intended key usage.
LOCAL loCert LOCAL lnSuccess * This example requires the Chilkat API to have been previously unlocked. * See Global Unlock Sample for sample code. loCert = CreateObject('Chilkat_9_5_0.Cert') * If you know the smart card PIN, set it prior to loading from the smartcard/USB token. loCert.SmartCardPin = "12345678" * To load a certificate matching an intended key usage, specify the type of usage as shown below. * * The possible key usage keywords are: * * digitalsignature * Use when the public key is used with a digital signature mechanism to support security services other than non-repudiation, certificate signing, or CRL signing. * A digital signature is often used for entity authentication and data origin authentication with integrity. * nonrepudiation * When a digital certificate's key usage includes "nonrepudiation," it implies that the certificate and its associated private key can be used to * create digital signatures that provide proof of the origin and integrity of the signed data, and the signer cannot later deny having signed the data. * Other less common usages: * certificatesigning * keyencipherment * dataencipherment * crlsigning * secureemail * serverauthentication * clientauthentication * codesigning * timestamping lnSuccess = loCert.LoadFromSmartcard("keyusage=nonrepudiation") IF (lnSuccess = 0) THEN ? loCert.LastErrorText ? "Certificate not loaded." RELEASE loCert CANCEL ENDIF ? "Found: " + loCert.SubjectDN + " serial=" + loCert.SerialNumber RELEASE loCert |
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