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(Unicode C) 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.
#include <C_CkCertW.h> void ChilkatSample(void) { HCkCertW cert; BOOL success; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. cert = CkCertW_Create(); // If you know the smart card PIN, set it prior to loading from the smartcard/USB token. CkCertW_putSmartCardPin(cert,L"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 success = CkCertW_LoadFromSmartcard(cert,L"keyusage=nonrepudiation"); if (success == FALSE) { wprintf(L"%s\n",CkCertW_lastErrorText(cert)); wprintf(L"Certificate not loaded.\n"); CkCertW_Dispose(cert); return; } wprintf(L"Found: %s serial=%s\n",CkCertW_subjectDN(cert),CkCertW_serialNumber(cert)); CkCertW_Dispose(cert); } |
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