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(Unicode C) DKIM Signature using Windows Current User Certificate StoreThis is a Windows-specific example to load a certificate from the Current User (registry-based) certificate store, and then use the certificate's associated private key for a DKIM signature.
#include <C_CkCertW.h> #include <C_CkPrivateKeyW.h> #include <C_CkDkimW.h> void ChilkatSample(void) { HCkCertW cert; BOOL success; HCkPrivateKeyW privKey; HCkDkimW dkim; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. cert = CkCertW_Create(); // The LoadByCommonName method searches the Windows Local Machine and Current User // registry-based certificate stores for a certificate having the common name specified. // If found, the certificate is loaded and ready for use. success = CkCertW_LoadByCommonName(cert,L"My Certificate ABC"); if (success != TRUE) { wprintf(L"%s\n",CkCertW_lastErrorText(cert)); CkCertW_Dispose(cert); return; } // The certificate must have an associated private key installed, and it must be a // private key that has been marked "exportable" when it was originally installed. if (!CkCertW_HasPrivateKey(cert)) { wprintf(L"This certificate does not have a private key available.\n"); CkCertW_Dispose(cert); return; } privKey = CkCertW_ExportPrivateKey(cert); if (CkCertW_getLastMethodSuccess(cert) == FALSE) { wprintf(L"%s\n",CkCertW_lastErrorText(cert)); CkCertW_Dispose(cert); return; } dkim = CkDkimW_Create(); // Load the private key into the DKIM object: success = CkDkimW_LoadDkimPk(dkim,CkPrivateKeyW_getPkcs8Pem(privKey),L""); if (success != TRUE) { wprintf(L"%s\n",CkDkimW_lastErrorText(dkim)); CkCertW_Dispose(cert); CkDkimW_Dispose(dkim); return; } // The private key has been loaded into the DKIM object. See the other DKIM // examples for guidance on how to create a DKIM signature... CkPrivateKeyW_Dispose(privKey); CkCertW_Dispose(cert); CkDkimW_Dispose(dkim); } |
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