(Unicode C++) Example: Mime.GetDecryptCertInfo method

Demonstrates the GetDecryptCertInfo method.

Note: This example requires Chilkat v11.4.0 or greater.

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#include <CkMimeW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkMimeW mime;

    // Load MIME that is has Content-Type like this:
    // Content-Type: application/pkcs7-mime; smime-type="enveloped-data"; name="smime.p7m"; smime-type="enveloped-data"
    success = mime.LoadMimeFile(L"qa_data/mime/enveloped_data.eml");
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        return;
    }

    // Get information about the certificate that would be needed to decrypt.
    // An enveloped-data can potentially be decrypted by multiple certificates if it was encrypted in a way that allows it,
    // but in most cases, only a single certificate with associated private key (that of the message recipient) is possible.
    CkJsonObjectW json;
    success = mime.GetDecryptCertInfo(json);
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        return;
    }

    json.put_EmitCompact(false);
    wprintf(L"%s\n",json.emit());

    // Sample output:

    // {
    //   "recipientInfo": [
    //     {
    //       "serial": "****",
    //       "issuerCN": "****"
    //     }
    //   ]
    // }

    // Get each certificate's information like this:
    const wchar_t *serial = 0;
    const wchar_t *issuerCN = 0;

    int i = 0;
    int count = json.SizeOfArray(L"recipientInfo");
    while (i < count) {
        json.put_I(i);
        serial = json.stringOf(L"recipientInfo[i].serial");
        issuerCN = json.stringOf(L"recipientInfo[i].issuerCN");
        i = i + 1;
    }
    }