org.apache.harmony.security.asn1 throwing null pointer exception
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Key: COMMONSSITE-70
URL: https://issues.apache.org/jira/browse/COMMONSSITE-70
Project: Commons All
Issue Type: Bug
Components: Commons Build
Affects Versions: 19
Environment: Android application development.
Reporter: Srijan Basu
Fix For: 19
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
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