(Unicode C) Find a Certificate by it's SHA-1 Thumbprint

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Note: This example requires Chilkat v10.1.2 or later.

Chilkat C/C++ Library Downloads
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#include <C_CkCertStoreW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkCertW.h>

void ChilkatSample(void)
    {
    HCkCertStoreW certStore;
    const wchar_t *thumbprint;
    BOOL bReadOnly;
    BOOL success;
    HCkJsonObjectW json;
    HCkCertW cert;
    HCkCertStoreW certStorePem;

    certStore = CkCertStoreW_Create();

    thumbprint = L"12c1dd8015f3f03f7b1fa619dc24e2493ca8b4b2";

    // This opens the Current User certificate store on Windows,
    // On MacOS and iOS it opens the default Keychain.
    bReadOnly = TRUE;
    success = CkCertStoreW_OpenCurrentUserStore(certStore,bReadOnly);
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertStoreW_lastErrorText(certStore));
        CkCertStoreW_Dispose(certStore);
        return;
    }

    // Find the certificate having a specific SHA1 thumbprint.
    json = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(json,L"thumbprint",thumbprint);

    cert = CkCertW_Create();
    success = CkCertStoreW_FindCert(certStore,json,cert);
    if (success == FALSE) {
        wprintf(L"Failed to find the certificate.\n");
        CkCertStoreW_Dispose(certStore);
        CkJsonObjectW_Dispose(json);
        CkCertW_Dispose(cert);
        return;
    }

    wprintf(L"Found: %s\n",CkCertW_subjectCN(cert));

    // -------------------------------------------------------------------------------------
    // Alternatively, one could load a certificate store object with certs from a PEM file,
    // and do the same thing..
    certStorePem = CkCertStoreW_Create();

    success = CkCertStoreW_LoadPemFile(certStorePem,L"pemFiles/certificates.pem");
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertStoreW_lastErrorText(certStorePem));
        CkCertStoreW_Dispose(certStore);
        CkJsonObjectW_Dispose(json);
        CkCertW_Dispose(cert);
        CkCertStoreW_Dispose(certStorePem);
        return;
    }

    success = CkCertStoreW_FindCert(certStore,json,cert);
    if (success == FALSE) {
        wprintf(L"Failed to find the certificate.\n");
        CkCertStoreW_Dispose(certStore);
        CkJsonObjectW_Dispose(json);
        CkCertW_Dispose(cert);
        CkCertStoreW_Dispose(certStorePem);
        return;
    }

    wprintf(L"Found: %s\n",CkCertW_subjectCN(cert));


    CkCertStoreW_Dispose(certStore);
    CkJsonObjectW_Dispose(json);
    CkCertW_Dispose(cert);
    CkCertStoreW_Dispose(certStorePem);

    }