2022-12-11 02:50:28.862 24393-24393/com.example.skillit E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.skillit, PID: 24393
java.lang.ClassCastException: android.app.Application cannot be cast to com.example.skillit.data.InventoryApplication
at com.example.skillit.ProfileActivity$viewModel$2.invoke(ProfileActivity.kt:22)
at com.example.skillit.ProfileActivity$viewModel$2.invoke(ProfileActivity.kt:21)
at androidx.lifecycle.ViewModelLazy.getValue(ViewModelLazy.kt:47)
at androidx.lifecycle.ViewModelLazy.getValue(ViewModelLazy.kt:35)
at com.example.skillit.ProfileActivity.getViewModel(ProfileActivity.kt:21)
at com.example.skillit.ProfileActivity.onCreate$lambda$3(ProfileActivity.kt:51)
at com.example.skillit.ProfileActivity.$r8$lambda$733-BBVTFBdHTXlcl6xFIzJMP3c(Unknown Source:0)
at com.example.skillit.ProfileActivity$$ExternalSyntheticLambda3.onClick(Unknown Source:2)
at android.view.View.performClick(View.java:7881)
at android.widget.TextView.performClick(TextView.java:16201)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1219)
at android.view.View.performClickInternal(View.java:7858)
at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
at android.view.View$PerformClick.run(View.java:30863)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:226)
at android.os.Looper.loop(Looper.java:313)
at android.app.ActivityThread.main(ActivityThread.java:8741)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)
THIS IS THE ProfileActivity.kt code:
package com.example.skillit
import android.content.Intent
import android.os.Bundle
import android.view.LayoutInflater
import android.widget.Button
import android.widget.ImageView
import androidx.activity.viewModels
import androidx.appcompat.app.AppCompatActivity
import androidx.cardview.widget.CardView
import androidx.fragment.app.activityViewModels
import com.example.skillit.data.InventoryApplication
import com.example.skillit.databinding.FragmentItemDetailBinding
import com.example.skillit.databinding.ProfileActivityBinding
class ProfileActivity : AppCompatActivity() {
//private var _binding: ProfileActivityBinding? = null
//private val binding get() = _binding!!
private val viewModel: InventoryViewModel by viewModels {
InventoryViewModelFactory((application as InventoryApplication).database.itemDao())
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
this.supportActionBar?.hide()
//_binding = ProfileActivityBinding.inflate(LayoutInflater.from(this))
//setContentView(binding.root)
setContentView(R.layout.profile_activity)
val explore_button = findViewById(R.id.explore_button) as CardView
val profile_button = findViewById(R.id.profile_button) as CardView
val home_button = findViewById(R.id.home_button) as CardView
val upload_button = findViewById<Button>(R.id.upload)
home_button.setOnClickListener{
intent = Intent(this, HomeActivity::class.java)
startActivity(intent)
overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_right)
}
explore_button.setOnClickListener{
intent = Intent(this, ExploreActivity::class.java)
startActivity(intent)
overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_right)
}
profile_button.setOnClickListener{
intent = Intent(this, ProfileActivity::class.java)
startActivity(intent)
}
upload_button.setOnClickListener{
viewModel.addNewItem("name", "link")
}
}
}
THIS IS THE InventoryAplication.kt code:
package com.example.skillit.data
import android.app.Application
class InventoryApplication : Application() {
val database: ItemRoomDatabase by lazy { ItemRoomDatabase.getDatabase(this) }
}
THIS IS THE ItemRoomDatabase.kt code:
package com.example.skillit.data
import android.content.Context
import androidx.room.Database
import androidx.room.Room
import androidx.room.RoomDatabase
#Database(entities = [Item::class], version = 1, exportSchema = false)
abstract class ItemRoomDatabase : RoomDatabase() {
abstract fun itemDao(): ItemDao
companion object {
#Volatile
private var INSTANCE: ItemRoomDatabase? = null
fun getDatabase(context: Context): ItemRoomDatabase {
// if the INSTANCE is not null, then return it,
// if it is, then create the database
return INSTANCE ?: synchronized(this) {
val instance = Room.databaseBuilder(
context.applicationContext,
ItemRoomDatabase::class.java,
"item_database"
)
// Wipes and rebuilds instead of migrating if no Migration object.
// Migration is not part of this codelab.
.fallbackToDestructiveMigration()
.build()
INSTANCE = instance
// return instance
instance
}
}
}
}
I tried to upload data to a database when you press the upload_button in the ProfileActivity.kt file but when you do, in the "Logcat" tab it keeps showing me the error mentioned above, I think the problem is with the ItemRoomDatabase but I cant figure out what doesn't work .
I tried to add attachment in ics file but it not showing in outlook when open it. I am trying to add attachment like when we send meeting request and add attachment in that from outlook, that attachment can view from calendar as well. This is my ics file :
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//appform.com//NONSGML kigkonsult.se iCalcreator 2.18//
METHOD:PUBLISH
X-WR-TIMEZONE:UTC
X-MS-OLK-FORCEINSPECTOROPEN:TRUE
BEGIN:VEVENT
UID:20160719T144014-694839744#appform.com
DTSTAMP:20160719T124014Z
ATTACH;FMTTYPE="application/msword; charset=binary";FILENAME=1468827330fCrj
O.doc:/var/www/html/basearch.appform.com/application/../public/uploads/146
8827330fCrjO.doc
ATTENDEE;RSVP=TRUE;SENT-BY="MAILTO:sajal#mailinator.com";CN=satyendra#hirest
orm.com;DIR="/var/www/html/app/application/../public/uplo
ads/1468827330fCrjO.doc";LANGUAGE=us-EN;X-AGENDA=Interview;X-LENGTH=30 min
:MAILTO:satyendra#mailinator.com
DESCRIPTION:Name: Dean Nestle Jones G\nVacancy: test\nEmployer: Zend\nDate:
Wednesday\, 20thJuly 2016\nTime: 1430 to 1500\n\nSubmit Feedback : http:/
/hirestorm.com/tms/a/Mg==/appid/NDU4/vacid/MTY4/candid/MTY=\n\nCandida
te CV : https://f12b1a775b358d1fc463-637e94f874af614e321f6.ssl.
cf2.rackcdn.com/1468827330fCrjO.doc\nOther Documents : https://f12b1a775
b358d1fc463-637e94f874af614cdn.com/146297361
8PwEwE.jpeg\n
DTSTART:20160720T090000Z
DTEND:20160720T093000Z
LOCATION:1 2 Elmshorn Schleswig-Holstein Germany
SEQUENCE:0
SUMMARY:New Interview Confirmed: Dean Nestle Jones G for test
BEGIN:VALARM
ACTION:PROCEDURE
DESCRIPTION:Name: Dean Nestle Jones G\nVacancy: test\nEmployer: Zend\nDate:
Wednesday\, 20thJuly 2016\nTime: 1430 to 1500\n\nSubmit Feedback : http:/
/hirestorm.com/tms/a/Mg==/appid/NDU4/vacid/MTY4/candid/MTY=\n\nCandida
te CV : https://f12b1a775b358d1fc463-637e94f874af614ce048a5e321d7d0f6.ssl.
cf2.rackcdn.com/1468827330fCrjO.doc\nOther Documents : https://f12b1a775
b358d1fc463-637e94f874af614ce048a5e32cdn.com/146297361
8PwEwE.jpeg\n
TRIGGER:-PT0H15M0S
END:VALARM
END:VEVENT
END:VCALENDAR
Your iCalendar file contains a reference to :
/var/www/html/basearch.appform.com/application/../public/uploads/1468827330fCrjO.doc
This would obviously be something on your machine. You're not embedding any file, you're just pasting a local path. Unless you have Outlook running on linux there's no way it can find that path.
I tried to do it in a simple java
import java.io.IOException;
import java.net.URI;
import java.text.ParseException;
import java.util.HashMap;
import javax.activation.DataHandler;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.util.ByteArrayDataSource;
import com.tba.readProps.Constants;
import com.tba.readProps.ReadProps;
import net.fortuna.ical4j.model.Calendar;
import net.fortuna.ical4j.model.DateTime;
import net.fortuna.ical4j.model.Period;
import net.fortuna.ical4j.model.component.VEvent;
import net.fortuna.ical4j.model.parameter.Cn;
import net.fortuna.ical4j.model.parameter.Role;
import net.fortuna.ical4j.model.property.Attendee;
import net.fortuna.ical4j.model.property.CalScale;
import net.fortuna.ical4j.model.property.ProdId;
import net.fortuna.ical4j.model.property.Uid;
import net.fortuna.ical4j.model.property.Version;
import net.fortuna.ical4j.util.RandomUidGenerator;
import net.fortuna.ical4j.util.UidGenerator;
public class EmailWithCalendar{
/**
* #param emailAddr
* #param subject
* #param message
*/
public static void sendHtmlEmail(String emailAddr, String subject, String message){
HashMap propertyValues = null;
String smtpHost = "";
try {
propertyValues = ReadProps.initializeProperties();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
smtpHost = (String) propertyValues.get(Constants.SMTP_HOST);
//ManagerPropertiesBean mgrProps = new ManagerPropertiesBean();
//String smtpHost = mgrProps.getMgrProperty("smtpHost");
try {
// start a session with given properties
java.util.Properties props = new java.util.Properties();
props.put("mail.smtp.host", smtpHost);
Session mailSession = Session.getDefaultInstance(props, null);
String fromAddress = null;
fromAddress = (String) propertyValues.get(Constants.FROM_ADDRESS);
if(!"undefined".equals(fromAddress)){
InternetAddress fromAddr = new InternetAddress("test#test.com");
InternetAddress toAddr = new InternetAddress(emailAddr);
MimeMessage myMessage = new MimeMessage(mailSession);
String replyToAddress = null;
replyToAddress = (String) propertyValues.get(Constants.REPLY_ADDRESS);
InternetAddress replyToAddr[] = new InternetAddress[1];
if(!"undefined".equals(replyToAddress))
replyToAddr[0] = new InternetAddress(replyToAddress);
boolean isfromValid = true;
boolean isToValid = true;
boolean emailDomainCheck = true;
MimeBodyPart messageBodyPart =new MimeBodyPart();
messageBodyPart.setContent(message ,"text/html" );
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);
myMessage.setContent(multipart);
if(emailDomainCheck==true)
{
myMessage.addRecipient(javax.mail.Message.RecipientType.TO, toAddr);
myMessage.setReplyTo(replyToAddr);
}
else
{
myMessage.setFrom(fromAddr);
myMessage.addRecipient(javax.mail.Message.RecipientType.TO, toAddr);
if(!"undefined".equals(replyToAddress))
myMessage.setReplyTo(replyToAddr);
}
myMessage.setSentDate(new java.util.Date());
myMessage.setSubject(subject);
messageBodyPart.setDataHandler(new DataHandler(
new ByteArrayDataSource(createEvent().toString(), "text/calendar")));// very important
//myMessage.setText(message);
// now send the message!
if(emailDomainCheck==true)
{
if(isfromValid==true && isToValid==true)
{
Transport.send(myMessage);
}
}
else
{
Transport.send(myMessage);
}
}
} catch (Exception e) {
e.printStackTrace();
System.out.println("Error occurred in ManagerEmailBean.sendHtmlEmail()");
}
}
private static Calendar createEvent() throws ParseException {
// Create the event
String eventName = "Progress Meeting";
//DateTime start = new DateTime(startDate.getTime());
//DateTime end = new DateTime(endDate.getTime());
// Create the date range which is desired.
DateTime start = new DateTime("20100101T070000Z");
DateTime end = new DateTime("20100201T070000Z");;
Period period = new Period(start, end);
VEvent meeting = new VEvent(start, end, eventName);
// add timezone info..
//meeting.getProperties().add(tz.getTimeZoneId());
// generate unique identifier..
UidGenerator ug = new RandomUidGenerator();
Uid uid = ug.generateUid();
meeting.getProperties().add(uid);
// add attendees..
Attendee dev1 = new Attendee(URI.create("mailto:dev1#test.com"));
dev1.getParameters().add(Role.REQ_PARTICIPANT);
dev1.getParameters().add(new Cn("Developer 1"));
meeting.getProperties().add(dev1);
Attendee dev2 = new Attendee(URI.create("mailto:dev2#test.com"));
dev2.getParameters().add(Role.OPT_PARTICIPANT);
dev2.getParameters().add(new Cn("Developer 2"));
meeting.getProperties().add(dev2);
// Create a calendar
net.fortuna.ical4j.model.Calendar icsCalendar = new net.fortuna.ical4j.model.Calendar();
icsCalendar.getProperties().add(new ProdId("-//Events Calendar//iCal4j 1.0//EN"));
icsCalendar.getProperties().add(Version.VERSION_2_0);
icsCalendar.getProperties().add(CalScale.GREGORIAN);
// Add the event and print
icsCalendar.getComponents().add(meeting);
System.out.println(icsCalendar);
return icsCalendar;
}
public static void main(String[] args) {
sendHtmlEmail("dev.test#gmail.com", "Test", "sjgsfgsf<p>dshdfsdf</p>");
}
}
Is there an API that my Google App Engine app can call when signed in as the as the app admin that would return information on the number of errors (404, 500, etc.) my app is returning?
I'd like to setup a simple cron job in my application to count the number of errors that my app is returning every few minutes and send me an email if the error rate becomes unexpectedly high. I'd like to avoid having to scrape the information from the Appspot dashboard or run another process outside of my app.
The closest thing to what you need is probably LogService API
Note that it isn't available for Java runtime (yet, I assume).
This only works on the cloud and is GAE-friendly.
You will need jsoup.
package some.package
import java.util.HashMap;
import java.util.Map;
import org.jsoup.Connection;
import org.jsoup.Connection.Method;
import org.jsoup.Connection.Response;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AppEngineScraperUtil
{
private static final Logger logger = LoggerFactory.getLogger( AppEngineScraperUtil.class );
/**
* #param appId
* in the form of {#code appId}
* #return dashboard in html
*/
public static String fetchDashboard( String appId )
{
return jsoupWay( appId );
}
private static String jsoupWay( String appId )
{
try
{
Connection conn = createGetConn( "https://appengine.google.com" );
Response result = conn.execute();
Document doc = result.parse();
// parse inputs
Elements elements = doc.select( "#dsh, [name=GALX], #service, #continue, #ltmpl" );
Map<String, String> formFields = new HashMap<String, String>();
// build form
for ( Element element: elements )
formFields.put( element.attr( "name" ), element.val() );
formFields.put( "Email", "xxx" );
formFields.put( "Passwd", "xxx" );
String formAction = doc.select( "form" ).first().attr( "action" );
// parse cookies
Map<String, String> cookies = result.cookies();
// build post
conn = createPostConn( formAction );
conn.cookies( cookies );
conn.data( formFields );
conn.header( "Content-Type", "application/x-www-form-urlencoded" );
result = conn.execute();
doc = result.parse();
// get dashboard
conn = createGetConn( "https://appengine.google.com/dashboard?&app_id=" + appId );
conn.cookies( result.cookies() );
result = conn.execute();
// return html
doc = result.parse();
return doc.toString();
}
catch ( Exception e )
{
logger.error( "Error retrieving dashboard.", e );
}
return null;
}
private static Connection createPostConn( String url )
{
Connection conn = Jsoup.connect( url );
conn.method( Method.POST );
return conn;
}
private static Connection createGetConn( String url )
{
Connection conn = Jsoup.connect( url );
conn.method( Method.GET );
return conn;
}
}
I'm attempting to port JXTA to run on App Engine. Given that the BouncyCastle "BC" provider is not yet supported on App Engine, I have to port the existing JXTA code to generate a X509Certificate using white-listed classes. My knowledge of Crypto is minimal and i'm not certain that what i'm trying to accomplish is even possible. Here is the original code from PSEUtils.java from the JXTA project:
PSEUtils.java
There's a helper class which contains the java.security.cert.X509Certificate:
public static class IssuerInfo {
public X509Certificate cert; // subject Cert
public PrivateKey subjectPkey; // subject private key
public X509Certificate issuer; // issuer Cert
public PrivateKey issuerPkey; // issuer private key
}
In the method:
public static IssuerInfo genCert(X500Principal subject, KeyPair keypair, IssuerInfo issuerinfo)
I'm passing in subject as:
new X500Principal("CN="+useCN)
keypair as (from original code):
KeyPairGenerator g = KeyPairGenerator.getInstance("RSA");
g.initialize(1024, UTILS.srng);
KeyPair keypair = g.generateKeyPair();
and the jxta coded IssuerInfo.
Now since I can't pull in the bouncycastle.jce packages, I've had to remove the X509Principal and X509V3CertificateGenerator code that JXTA uses and attempt to replace it with an implementation that complies with the GAE restrictions. Here is what I currently have for the genCert method using org.bouncycastle.X509.X509v3CertificateBuilder.
SubjectPublicKeyInfo subPubKeyInfo = SubjectPublicKeyInfo.getInstance(keypair.getPublic().getEncoded());
X509v3CertificateBuilder v3CertGen = new X509v3CertificateBuilder(
new X500Name(issuer.getName()),
BigInteger.ONE,
today, until,
new X500Name(subject.getName()),
subPubKeyInfo);
The problem is that I can't get keypair.getPublic().getEncoded() to work with the SubjectPublicKeyInfo.getInstance() method. Throws java.lang.IllegalArgumentException: unknown object in factory: [B
Public Key appears to be populated upon inspection:
Sun RSA public key, 1024 bits
modulus: 117521430893506212334140912845641570591161279468597426442875306202350445904550279678434051874985419676760802566018092318362676224355315431299979507080364677679613392086245588766565617009250512996843008784370448997729071786062596049780632058501646041736216482596596901215941577208285499619376322050871534546271
public exponent: 65537
I've found the following SO link which demonstrates this code working:
Sign CSR using Bouncy Castle
My attempt to convert genCert is below but for some reason, I can't get past creating SubjectPublicKeyInfo from the encoded public key?
Any help is greatly appreciated.
public static IssuerInfo genCert(X500Principal subject, KeyPair keypair, IssuerInfo issuerinfo) {
IssuerInfo info = new IssuerInfo();
try {
// set up issuer
PrivateKey signer;
X500Principal issuer;
if (null == issuerinfo) { // self-signed root cert
signer = keypair.getPrivate();
issuer = new X500Principal(subject.getEncoded());
} else { // issuer signed service sert
signer = issuerinfo.subjectPkey;
X500Principal issuer_subject = issuerinfo.cert.getSubjectX500Principal();
issuer = new X500Principal(issuer_subject.getEncoded());
}
// set validity 10 years from today
Date today = new Date();
Calendar cal = Calendar.getInstance();
cal.setTime(today);
cal.add(Calendar.YEAR, 10);
Date until = cal.getTime();
SubjectPublicKeyInfo subPubKeyInfo = SubjectPublicKeyInfo.getInstance(keypair.getPublic().getEncoded());
//**Can't get here so i'm not sure if the rest of this works?**
AlgorithmIdentifier sigAlgId = new DefaultSignatureAlgorithmIdentifierFinder().find("SHA1withRSA");
AlgorithmIdentifier digAlgId = new DefaultDigestAlgorithmIdentifierFinder().find(sigAlgId);
RSAPrivateCrtKeyParameters cps = (RSAPrivateCrtKeyParameters) keypair.getPrivate();
ContentSigner sigGen = new BcRSAContentSignerBuilder(sigAlgId, digAlgId).build(cps);
X509CertificateHolder certHolder = v3CertGen.build(sigGen);
CertificateFactory cf = CertificateFactory.getInstance("X.509");
// Read user Certificate
InputStream is1 = new ByteArrayInputStream(certHolder.getEncoded());
X509Certificate eeCert = (X509Certificate) cf.generateCertificate(is1);
is1.close();
I was able to accomplish this with help from Rene Mayrhofer's code.
I've provided my implementation which has only be tested in a local testing environment but it appears to work:
package net.jxta.impl.membership.pse;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Signature;
import java.security.SignatureException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.security.interfaces.RSAPrivateCrtKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.RSAPrivateCrtKeySpec;
import java.security.spec.RSAPublicKeySpec;
import java.util.Calendar;
import java.util.Date;
import java.util.logging.Logger;
import javax.security.auth.x500.X500Principal;
import org.apache.commons.codec.binary.Hex;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERBMPString;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DEROutputStream;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.DigestInfo;
import org.bouncycastle.asn1.x509.RSAPublicKeyStructure;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.asn1.x509.TBSCertificateStructure;
import org.bouncycastle.asn1.x509.Time;
import org.bouncycastle.asn1.x509.V3TBSCertificateGenerator;
import org.bouncycastle.asn1.x509.X509CertificateStructure;
import org.bouncycastle.asn1.x509.X509Name;
import org.bouncycastle.asn1.x509.X509ObjectIdentifiers;
import org.bouncycastle.crypto.AsymmetricBlockCipher;
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.CryptoException;
import org.bouncycastle.crypto.DataLengthException;
import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.crypto.encodings.PKCS1Encoding;
import org.bouncycastle.crypto.engines.RSAEngine;
import org.bouncycastle.crypto.generators.RSAKeyPairGenerator;
import org.bouncycastle.crypto.params.RSAKeyGenerationParameters;
import org.bouncycastle.crypto.params.RSAKeyParameters;
import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters;
import org.bouncycastle.jce.PrincipalUtil;
import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier;
import org.bouncycastle.jce.provider.X509CertificateObject;
import org.bouncycastle.x509.X509Util;
import org.bouncycastle.x509.extension.SubjectKeyIdentifierStructure;
/** This class uses the Bouncycastle lightweight API to generate X.509 certificates programmatically.
* It assumes a CA certificate and its private key to be available and can sign the new certificate with
* this CA. Some of the code for this class was taken from
* org.bouncycastle.x509.X509V3CertificateGenerator, but adapted to work with the lightweight API instead of
* JCE (which is usually not available on MIDP2.0).
*
* #author Rene Mayrhofer
*/
public class X509CertificateGenerator {
/** Our log4j logger. */
private static Logger logger = Logger.getLogger(X509CertificateGenerator.class.getName());
/** This holds the certificate of the CA used to sign the new certificate. The object is created in the constructor. */
private X509Certificate caCert;
/** This holds the private key of the CA used to sign the new certificate. The object is created in the constructor. */
private RSAPrivateCrtKeyParameters caPrivateKey;
private boolean useBCAPI;
private boolean useCACert;
public X509CertificateGenerator(String caFile, String caPassword, String caAlias, boolean useBCAPI)
throws KeyStoreException, NoSuchAlgorithmException, CertificateException, FileNotFoundException, IOException, UnrecoverableKeyException, InvalidKeyException, NoSuchProviderException, SignatureException {
this.useBCAPI = useBCAPI;
this.useCACert = true;
logger.info("Loading CA certificate and private key from file '" + caFile + "', using alias '" + caAlias + "' with "
+ (this.useBCAPI ? "Bouncycastle lightweight API" : "JCE API"));
KeyStore caKs = KeyStore.getInstance("PKCS12");
caKs.load(new FileInputStream(new File(caFile)), caPassword.toCharArray());
// load the key entry from the keystore
Key key = caKs.getKey(caAlias, caPassword.toCharArray());
if (key == null) {
throw new RuntimeException("Got null key from keystore!");
}
RSAPrivateCrtKey privKey = (RSAPrivateCrtKey) key;
caPrivateKey = new RSAPrivateCrtKeyParameters(privKey.getModulus(), privKey.getPublicExponent(), privKey.getPrivateExponent(),
privKey.getPrimeP(), privKey.getPrimeQ(), privKey.getPrimeExponentP(), privKey.getPrimeExponentQ(), privKey.getCrtCoefficient());
// and get the certificate
caCert = (X509Certificate) caKs.getCertificate(caAlias);
if (caCert == null) {
throw new RuntimeException("Got null cert from keystore!");
}
logger.info("Successfully loaded CA key and certificate. CA DN is '" + caCert.getSubjectDN().getName() + "'");
caCert.verify(caCert.getPublicKey());
logger.info("Successfully verified CA certificate with its own public key.");
}
public X509CertificateGenerator(boolean useBCAPI) throws KeyStoreException, NoSuchAlgorithmException, CertificateException, FileNotFoundException, IOException, UnrecoverableKeyException, InvalidKeyException, NoSuchProviderException, SignatureException {
this.useBCAPI = useBCAPI;
this.useCACert = false;
}
public X509Certificate createCertificate(String dn, int validityDays, X500Principal issuer, KeyPair keypairca) throws
IOException, InvalidKeyException, SecurityException, SignatureException, NoSuchAlgorithmException, DataLengthException, CryptoException, KeyStoreException, NoSuchProviderException, CertificateException, InvalidKeySpecException {
logger.info("Generating certificate for distinguished subject name '" +
dn + "', valid for " + validityDays + " days");
RSAPrivateCrtKey pK = (RSAPrivateCrtKey) keypairca.getPrivate();
caPrivateKey = new RSAPrivateCrtKeyParameters(pK.getModulus(), pK.getPublicExponent(), pK.getPrivateExponent(),
pK.getPrimeP(), pK.getPrimeQ(), pK.getPrimeExponentP(), pK.getPrimeExponentQ(), pK.getCrtCoefficient());
SecureRandom sr = new SecureRandom();
PublicKey pubKey;
PrivateKey privKey;
logger.info("Creating RSA keypair");
// generate the keypair for the new certificate
if (useBCAPI) {
RSAKeyPairGenerator gen = new RSAKeyPairGenerator();
gen.init(new RSAKeyGenerationParameters(BigInteger.valueOf(3), sr, 1024, 80));
AsymmetricCipherKeyPair keypair = gen.generateKeyPair();
logger.info("Generated keypair, extracting components and creating public structure for certificate");
RSAKeyParameters publicKey = (RSAKeyParameters) keypair.getPublic();
RSAPrivateCrtKeyParameters privateKey = (RSAPrivateCrtKeyParameters) keypair.getPrivate();
// used to get proper encoding for the certificate
RSAPublicKeyStructure pkStruct = new RSAPublicKeyStructure(publicKey.getModulus(), publicKey.getExponent());
logger.info("New public key is '" + new String(Hex.encodeHex(pkStruct.getEncoded())) +
", exponent=" + publicKey.getExponent() + ", modulus=" + publicKey.getModulus());
// JCE format needed for the certificate - because getEncoded() is necessary...
pubKey = KeyFactory.getInstance("RSA").generatePublic(
new RSAPublicKeySpec(publicKey.getModulus(), publicKey.getExponent()));
// and this one for the KeyStore
privKey = KeyFactory.getInstance("RSA").generatePrivate(
new RSAPrivateCrtKeySpec(publicKey.getModulus(), publicKey.getExponent(),
privateKey.getExponent(), privateKey.getP(), privateKey.getQ(),
privateKey.getDP(), privateKey.getDQ(), privateKey.getQInv()));
}
else {
// this is the JSSE way of key generation
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
keyGen.initialize(1024, sr);
KeyPair keypair = keyGen.generateKeyPair();
privKey = keypair.getPrivate();
pubKey = keypair.getPublic();
}
Calendar expiry = Calendar.getInstance();
expiry.add(Calendar.DAY_OF_YEAR, validityDays);
X509Name x509Name = new X509Name("CN=" + dn);
X509Name x509Issuer = new X509Name(issuer.getName());
V3TBSCertificateGenerator certGen = new V3TBSCertificateGenerator();
certGen.setSerialNumber(new DERInteger(BigInteger.valueOf(System.currentTimeMillis())));
certGen.setIssuer(x509Issuer);//issuer.getName());//PrincipalUtil.getSubjectX509Principal(caCert));
certGen.setSubject(x509Name);
DERObjectIdentifier sigOID = X509Util.getAlgorithmOID("SHA1WithRSAEncryption");
AlgorithmIdentifier sigAlgId = new AlgorithmIdentifier(sigOID, new DERNull());
certGen.setSignature(sigAlgId);
certGen.setSubjectPublicKeyInfo(new SubjectPublicKeyInfo((ASN1Sequence)new ASN1InputStream(
new ByteArrayInputStream(pubKey.getEncoded())).readObject()));
certGen.setStartDate(new Time(new Date(System.currentTimeMillis())));
certGen.setEndDate(new Time(expiry.getTime()));
logger.info("Certificate structure generated, creating SHA1 digest");
// attention: hard coded to be SHA1+RSA!
SHA1Digest digester = new SHA1Digest();
AsymmetricBlockCipher rsa = new PKCS1Encoding(new RSAEngine());
TBSCertificateStructure tbsCert = certGen.generateTBSCertificate();
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
dOut.writeObject(tbsCert);
// and now sign
byte[] signature;
if (useBCAPI) {
byte[] certBlock = bOut.toByteArray();
// first create digest
logger.info("Block to sign is '" + new String(Hex.encodeHex(certBlock)) + "'");
digester.update(certBlock, 0, certBlock.length);
byte[] hash = new byte[digester.getDigestSize()];
digester.doFinal(hash, 0);
// and sign that
rsa.init(true, caPrivateKey);
DigestInfo dInfo = new DigestInfo( new AlgorithmIdentifier(X509ObjectIdentifiers.id_SHA1, null), hash);
byte[] digest = dInfo.getEncoded(ASN1Encodable.DER);
signature = rsa.processBlock(digest, 0, digest.length);
}
else {
// or the JCE way
PrivateKey caPrivKey = KeyFactory.getInstance("RSA").generatePrivate(
new RSAPrivateCrtKeySpec(caPrivateKey.getModulus(), caPrivateKey.getPublicExponent(),
caPrivateKey.getExponent(), caPrivateKey.getP(), caPrivateKey.getQ(),
caPrivateKey.getDP(), caPrivateKey.getDQ(), caPrivateKey.getQInv()));
Signature sig = Signature.getInstance(sigOID.getId());
sig.initSign(caPrivKey, sr);
sig.update(bOut.toByteArray());
signature = sig.sign();
}
logger.info("SHA1/RSA signature of digest is '" + new String(Hex.encodeHex(signature)) + "'");
// and finally construct the certificate structure
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(tbsCert);
v.add(sigAlgId);
v.add(new DERBitString(signature));
X509CertificateObject clientCert = new X509CertificateObject(new X509CertificateStructure(new DERSequence(v)));
logger.info("Verifying certificate for correct signature with CA public key");
if(useCACert) clientCert.verify(caCert.getPublicKey());
return clientCert;
}
}
I wish to have a file upload form that in addition to the file selection input , also has other input fields like textarea, dropdown etc. The problem is that I cannot access any post parameters other than the file in my blobstore upload handler. I am using the following function call to get the parameter name but it always returns an empty screen.
par = self.request.get("par")
I found another question with a similar problem Uploading a video to google app engine blobstore. The answer to that question suggests a workaround solution to set the filename to the parameter you wish to read which is not sufficient for my needs. Is there a way to access other form parameters in the post method of blobstore upload handler?
Did you find the solution?
In my experience, when using form/multipart request doesn't include the other parameters and they have to be dug out manually.
This is how I dig out parameters out of request that is used to send a file.
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;
// for reading form data when posted with multipart/form-data
import java.io.*;
import javax.servlet.ServletException;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import com.google.appengine.api.datastore.Blob;
// Fetch the attributes for a given model using rails conventions.
// We need to do this in Java because getParameterMap uses generics.
// We currently only support one lever: foo[bar] but not foo[bar][baz].
// We currently only pull the first value, so no support for checkboxes
public class ScopedParameterMap {
public static Map params(HttpServletRequest req, String model)
throws ServletException, IOException {
Map<String, Object> scoped = new HashMap<String, Object>();
if (req.getHeader("Content-Type").startsWith("multipart/form-data")) {
try {
ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iterator = upload.getItemIterator(req); // this is used to get those params
while (iterator.hasNext()) {
FileItemStream item = iterator.next();
InputStream stream = item.openStream();
String attr = item.getFieldName();
if (attr.startsWith(model + "[") && attr.endsWith("]")) { // fetches all stuff like article[...], you can modify this to return only one value
int len = 0;
int offset = 0;
byte[] buffer = new byte[8192];
ByteArrayOutputStream file = new ByteArrayOutputStream();
while ((len = stream.read(buffer, 0, buffer.length)) != -1) {
offset += len;
file.write(buffer, 0, len);
}
String key = attr.split("\\[|\\]")[1];
if (item.isFormField()) {
scoped.put(key, file.toString());
} else {
if (file.size() > 0) {
scoped.put(key, file.toByteArray());
}
}
}
}
} catch (Exception ex) {
throw new ServletException(ex);
}
} else {
Map params = req.getParameterMap();
Iterator i = params.keySet().iterator();
while (i.hasNext()) {
String attr = (String) i.next();
if (attr.startsWith(model + "[") && attr.endsWith("]")) {
String key = attr.split("\\[|\\]")[1];
String val = ((String[]) params.get(attr))[0];
scoped.put(key, val);
// TODO: when multiple values, set a List instead
}
}
}
return scoped;
}
}
I hope this speedy answer helps, let me know if you have questions.