(Android™) openssl smime -encrypt -des3 -in

See more OpenSSL Examples

OpenSSL SMIME encrypt file using PEM containing a certificate.

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);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Load the cert from a PEM file.

    CkPem pem = new CkPem();
    // Our particular PEM was not encrypted, so we pass an empty password.
    // Also, a private key is not needed for encryption.  The PEM used to test this example
    // happens to have a private key, but it's not actually used.
    boolean success = pem.LoadPemFile("qa_data/openssl/rsaCertAndKey.pem","");
    if (success == false) {
        Log.i(TAG, pem.lastErrorText());
        return;
        }

    if (pem.get_NumCerts() == 0) {
        Log.i(TAG, "PEM does not contain any certificates.");
        return;
        }

    CkCert cert = pem.GetCert(0);
    if (pem.get_LastMethodSuccess() == false) {
        Log.i(TAG, pem.lastErrorText());
        return;
        }

    // -------------------------------------------------------------------------------------
    // Duplicate this OpenSSL command:   openssl smime -encrypt -des3 -in <file> <pem file>
    // -------------------------------------------------------------------------------------
    CkCrypt2 crypt = new CkCrypt2();
    success = crypt.SetEncryptCert(cert);
    if (success == false) {
        Log.i(TAG, crypt.lastErrorText());

        return;
        }

    crypt.put_CryptAlgorithm("PKI");
    crypt.put_Pkcs7CryptAlg("3des");
    crypt.put_KeyLength(168);

    // Load the file to be encrypted.
    CkBinData bd = new CkBinData();
    success = bd.LoadFile("qa_data/openssl/hello.txt");
    if (success == false) {
        Log.i(TAG, "Failed to load the input file.");
        return;
        }

    // Encrypt.
    success = crypt.EncryptBd(bd);
    if (success == false) {
        Log.i(TAG, crypt.lastErrorText());
        return;
        }

    // The openssl smime -encrypt command produces encrypte MIME such as this:

    // MIME-Version: 1.0
    // Content-Disposition: attachment; filename="smime.p7m"
    // Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data; name="smime.p7m"
    // Content-Transfer-Encoding: base64
    // 
    // MIICzwYJKoZIhvcNAQcDoIICwDCCArwCAQAxggF8MIIBeAIBADBgMEoxCzAJBgNVBAYTAlVTMRYw
    // FAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQDExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBY
    // MwISA9Nqgb1dH/XTDNeKzN1nR85iMA0GCSqGSIb3DQEBAQUABIIBAIQqPexjxWovgxwKV/r3HL/U
    // EP9Yozvz5hBeX5VvRZjKSi4FRw5wapElPK+4FB82hiAR9Mi3c16PvPSVkJv3l78Mv5uaaOs/OmUz
    // mIHFB6Z+l2E52BDmUVWJZTQ09vdWy6+NIRlg2R9Z1NkmZ4BZCJk6mHB/Yx03IaOxK8LnwieDMthM
    // SvxbhJnIOISN7k7ofs+/0vTXUpdQ+tlmwyVySMGQ6VMk+z4sqZJ2stacqCPtt/aiSwJ9p0OKmihf
    // 3KDJceXJtavIQeA97yz1LqPvle35mmd5sBhV9qQYdTV/KJ+YM5uEZ9BHYbvMJbADFHwKzhcEY3qA
    // 7T9acmEsb7NycOIwggE1BgkqhkiG9w0BBwEwFAYIKoZIhvcNAwcECERX/ZoHweSkgIIBEMmCMx49
    // zjVAnGqRaBbvzQT1hg0uQSxIJjxMxC+HSuM+eY9oSOsbrw4uIijHKH9NdOpeDsdRzg2z5EBM7AlP
    // Ht9DyPW5C2deV6RPX4F8gyExz+JUXrd+3Yb3AKTdpDkTWDmNCeO0r/YSqp518+mfU5hG8e336u51
    // HAM44FeknA8oThWsD/wUB1e8vzsatK4UXW/KSu/166V7z+VT86kd+IHa7t60U9Yp0ZXgcM5Pb5Ni
    // 69Qc5MKPzom2801H5UR/WjCgsxOIjOj49sKisjRy79skrJzxY5ZG05T0dKn6KC3TjRpIEEeOyhCd
    // Nm2Y7dcW8GLMepdhWay5vePmQxmvmhbAtBprIem14NcrYeG6D5wP

    // We have the body in bd
    // Construct the header and base64 body...
    CkStringBuilder sbEncryptedMime = new CkStringBuilder();

    sbEncryptedMime.AppendLine("MIME-Version: 1.0",true);
    sbEncryptedMime.AppendLine("Content-Disposition: attachment; filename=\"smime.p7m\"",true);
    sbEncryptedMime.AppendLine("Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data; name=\"smime.p7m\"",true);
    sbEncryptedMime.AppendLine("Content-Transfer-Encoding: base64",true);
    sbEncryptedMime.AppendLine("",true);
    sbEncryptedMime.AppendLine(bd.getEncoded("base64_mime"),true);

    // Show the result.
    Log.i(TAG, sbEncryptedMime.getAsString());

    // or save to a file..
    success = sbEncryptedMime.WriteFile("qa_output/encryptedMime.txt","utf-8",false);

  }

  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."
  }
}