Java Requires Chilkat v11.4.0+

Example: Mime.GetDecryptCertInfo method

Demonstrates the GetDecryptCertInfo method. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Mime;

public class ChilkatExample {

    public static void main(String[] args) {
        Mime mime = new 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"
        try {
            mime.loadMimeFile("qa_data/mime/enveloped_data.eml");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            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.
        JsonObject json = new JsonObject();
        try {
            mime.getDecryptCertInfo(json);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        json.setEmitCompact(false);
        System.out.println(json.emit());

        // Sample output:

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

        // Get each certificate's information like this:
        String serial = "";
        String issuerCN = "";

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