(Android™) Example: Crypt2.GetSignedAttributes method

Demonstrates how to call the GetSignedAttributes method.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    CkCrypt2 crypt = new CkCrypt2();

    CkBinData bdPkcs7 = new CkBinData();
    boolean success = bdPkcs7.LoadFile("qa_data/cades/CAdES-T/Signature-C-T-1.p7m");
    if (success == false) {
        Log.i(TAG, bdPkcs7.lastErrorText());
        return;
        }

    CkJsonObject json = new CkJsonObject();
    json.put_EmitCompact(false);

    CkStringBuilder sbJson = new CkStringBuilder();
    int i = 0;
    boolean tryNext = true;
    while (tryNext) {
        if (crypt.GetSignedAttributes(i,bdPkcs7,sbJson) == true) {
            json.LoadSb(sbJson);
            Log.i(TAG, String.valueOf(i) + ": ");
            Log.i(TAG, json.emit());
            }
        else {
            tryNext = false;
            }

        i = i + 1;
        }

    // Sample output:

    // 0: 
    // {
    //   "signedAttributes": [
    //     {
    //       "oid": "1.2.840.113549.1.9.3",
    //       "name": "Content Type"
    //     },
    //     {
    //       "oid": "1.2.840.113549.1.9.5",
    //       "name": "Signing Time"
    //     },
    //     {
    //       "oid": "1.2.840.113549.1.9.4",
    //       "name": "Message Digest"
    //     },
    //     {
    //       "oid": "1.2.840.113549.1.9.16.2.47",
    //       "name": "Signing Certificate V2"
    //     }
    //   ]
    // }

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}