[COMMONSSITE-70] org.apache.harmony.security.asn1 throwing null pointer exception

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 19
• Component/s: Commons Build
• Labels: mentor

Environment

Android application development.

• Assignee: Unassigned
• Reporter: Srijan Basu
• Created: 22/Mar/12 08:57
• Updated: 22/Mar/12 09:45
• Resolved: 22/Mar/12 09:45

Description

I am trying to parse a .cer certificate issued by Thwate(find it attacthed).I am getting a null pointer exception while parsing the certificate.But I am able to parse other .cer certificates without any problem.

package com.ams;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

import com.ams.certparser.CertificateParserUtil;

public class CertificateParserTestActivity extends Activity {
/** Called when the activity is first created. */
private static String TAG = "CertificateParserTestActivity";

@Override
public void onCreate(Bundle savedInstanceState)

{ super.onCreate(savedInstanceState); setContentView(R.layout.main); CertificateParserUtil certParserUtil = new CertificateParserUtil( "sdcard/Thwate.cer","null"); certParserUtil.parse(); // Log.i(TAG, "Type:" + certParserUtil.getCertType()); Log.i(TAG, "Version:" + certParserUtil.getVersion()); Log.i(TAG, "Basic Constraint Extensions:" + certParserUtil.getBasicConstraints()); Log.i(TAG, "IssuerUniqueID:" + certParserUtil.getIssuerUniqueID()); Log.i(TAG, "IssuerName:" + certParserUtil.getIssuerX500Principal()); Log.i(TAG, "Public Key:"+ certParserUtil.getPublicKey()); Log.i(TAG, "Issuer DN:" + certParserUtil.getIssuerDN()); Log.i(TAG, "Subject:" + certParserUtil.getSubjectDN()); Log.i(TAG, "Valid From:" + certParserUtil.getValidFrom()); Log.i(TAG, "Valid Till:" + certParserUtil.getValidTill()); Log.i(TAG, "Public Key:" + certParserUtil.getPublicKey().getAlgorithm()); Log.i(TAG, "Serial Number:" + certParserUtil.getSerialNumber()); Log.i(TAG, "Key:" + certParserUtil.getKeyUsage()); Log.i(TAG, "Signature:" + certParserUtil.getSignature()); Log.i(TAG, "SignSlgoName:" + certParserUtil.getSigAlgName()); //Log.i(TAG, "Signature:" + certParserUtil.getTBSCertificate()); }

}

package com.ams.certparser;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.math.BigInteger;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.Principal;
import java.security.PublicKey;
import java.security.cert.CertificateEncodingException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.Date;
import java.util.Enumeration;

import javax.security.auth.x500.X500Principal;

import android.os.Environment;

import android.util.Log;

public class CertificateParserUtil {

private static final String TAG = "CertificateParserUtil";
public static final String PFX = "PFX";
public static final String CER = "CER";
FileInputStream fin = null;
private String filePath;
private String password;
X509Certificate cert;

public CertificateParserUtil(String filePath, String password)

{ this.filePath = filePath; this.password = password; }

private String getExtension()

{ String ext = ""; int mid = filePath.lastIndexOf("."); ext = filePath.substring(mid + 1, filePath.length()); return ext; }

public void parse() {
String ext = getExtension();
File file = new File(filePath);
if (PFX.equalsIgnoreCase(ext)) {

KeyStore ks = null;
try {
ks = KeyStore.getInstance("PKCS12");

//fin = new FileInputStream(file);
ks.load(fin, password.toCharArray());
Enumeration<String> aliasesEnum = null;
aliasesEnum = ks.aliases();
while (aliasesEnum.hasMoreElements())

{ String alias = (String) aliasesEnum.nextElement(); cert = (X509Certificate) ks.getCertificate(alias); }

} catch (KeyStoreException e)

{ Log.i(TAG, "KeyStoreException:" + e.getMessage()); }

catch (FileNotFoundException e)

{ Log.i(TAG, "FileNOTFoundException:" + e.getMessage()); }

catch (CertificateException e)

{ Log.i(TAG, "CertificateException:" + e.getMessage()); }

catch (IOException e)

{ Log.i(TAG, "IOException:" + e.getMessage()); }

catch (NoSuchAlgorithmException e)

{ Log.i(TAG, "AlgorithmException:" + e.getMessage()); }

catch (Exception e)

{ Log.i(TAG, "Exception:" + e.getMessage()); }

} else if (CER.equalsIgnoreCase(ext)) {
try {

fin = new FileInputStream(file);
BufferedInputStream bf = new BufferedInputStream(fin);
CertificateFactory cf = null;
cf = CertificateFactory.getInstance("X.509");
while (bf.available() > 0)

{ cert = (X509Certificate) cf.generateCertificate(bf); }

} catch (FileNotFoundException e)

{ Log.i(TAG, "FileNOTFoundException:" + e.getMessage()); }

catch (CertificateException e)

{ Log.i(TAG, "CertificateException:" + e.getMessage()); }

catch (IOException e)

{ Log.i(TAG, "IOException:" + e.getMessage()); }

catch (Exception e)

{ Log.i(TAG, "Exception:" + e.getMessage()); }

}

}

public String getCertType()

{ return cert.getType(); }

public int getVersion()

{ return cert.getVersion(); }

public int getBasicConstraints()

{ return cert.getBasicConstraints(); }

public boolean[] getIssuerUniqueID()

{ return cert.getIssuerUniqueID(); }

public X500Principal getIssuerX500Principal()

{ return cert.getIssuerX500Principal(); }

public PublicKey getPublicKey()

{ return cert.getPublicKey(); }

public Principal getIssuerDN()

{ return cert.getIssuerDN(); }

public Principal getSubjectDN()

{ return cert.getSubjectDN(); }

public Date getValidFrom()

{ return cert.getNotBefore(); }

public Date getValidTill()

{ return cert.getNotAfter(); }

public String getAlgorithm()

{ return cert.getPublicKey().getAlgorithm(); }

public BigInteger getSerialNumber()

{ return cert.getSerialNumber(); }

public boolean[] getKeyUsage()

{ return cert.getKeyUsage(); }

public byte[] getSignature()

{ return cert.getSignature(); }

public String getSigAlgName()

{ return cert.getSigAlgName(); }

}

CertificateException:org.apache.harmony.security.asn1.ASN1Exception: ASN.1 Sequence: mandatory value is missing at [4].

The folllowing is the stacktrace for your refrence.

03-22 12:16:30.667: W/dalvikvm(1749): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
03-22 12:16:30.717: E/AndroidRuntime(1749): FATAL EXCEPTION: main
03-22 12:16:30.717: E/AndroidRuntime(1749): java.lang.RuntimeException: Unable to start activity ComponentInfo

{com.ams/com.ams.CertificateParserTestActivity}

: java.lang.NullPointerException
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.app.ActivityThread.access$600(ActivityThread.java:123)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.os.Handler.dispatchMessage(Handler.java:99)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.os.Looper.loop(Looper.java:137)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.app.ActivityThread.main(ActivityThread.java:4424)
03-22 12:16:30.717: E/AndroidRuntime(1749): at java.lang.reflect.Method.invokeNative(Native Method)
03-22 12:16:30.717: E/AndroidRuntime(1749): at java.lang.reflect.Method.invoke(Method.java:511)
03-22 12:16:30.717: E/AndroidRuntime(1749): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-22 12:16:30.717: E/AndroidRuntime(1749): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-22 12:16:30.717: E/AndroidRuntime(1749): at dalvik.system.NativeStart.main(Native Method)
03-22 12:16:30.717: E/AndroidRuntime(1749): Caused by: java.lang.NullPointerException
03-22 12:16:30.717: E/AndroidRuntime(1749): at com.ams.certparser.CertificateParserUtil.getVersion(CertificateParserUtil.java:115)
03-22 12:16:30.717: E/AndroidRuntime(1749): at com.ams.CertificateParserTestActivity.onCreate(CertificateParserTestActivity.java:23)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.app.Activity.performCreate(Activity.java:4465)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
03-22 12:16:30.717: E/AndroidRuntime(1749): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
03-22 12:16:30.717: E/AndroidRuntime(1749): ... 11 more