Send encryption data through network
I'm doing encryption data exchanging project. I can describe my scenario anyone can give me good suggestion.
I use RSA Key pair. Client side encrypt the data using private key and server decrypt those data using particular public key. I store my keys in keystore. For one attempt I use public and private keys belong to one alias. My problem is when doing decryption in server side I got error message (BadPaddingException: Data must start with zero). But if I do encryption and decryption in same class using same keys without any client/server connection it works properly.
So, if anyone can give me any advice or suggestion, I'm very appreciat
ivanovpv wrote:
I think problem is somewhere in data transmission. During transmission either server or client adds extra padding information.No. For symmetric block based encrypted the clear text has to be padded to make it a full block. This is normally done as part of the encryption process using PKCS5 padding. Padding is also reqired for RSA encryption so as to make sure the cleartext ^ public_exponent is greater than the modulus. This is normally done using PKCS1 padding.
If the encrypted data is corrupt then one normally gets a exception such as BadPaddingException when decrypting using a symmetric algorithm or an exception indicating that the padded data should start with a zero in the case of RSA encryption.
It is almost certain that the OP has corrupted his encrypted data or his key, possibly by converting to a String without using Hex or Base64 encoding. Without seeing his code we will probably never know.
>
I would suggest just get your public key (i hope it's just a long/String probably wrapped within some class) then explicitly convert it into character array (best is to use UTF-8 encoding) - then transmit through network. On other side decode from UTF-8 character array into long/String - probably you'd need to instantiate public key object from your long/String and enjoy!String should never be used as a container for binary data and keys are binary data. Just converting them to a String specifying utf-8 will almost certainly corrupt them. If one must have a String version of any binary data whether it be a key or cipher text one should reversibly encode it using something like Base64 or Hex.
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How to send encrypted data through XI. Pls advice urgent
Hi All,
There is some customer confidental information that I need to
send from source system to XI and then to target system.
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Please send me blogs/docs how this scenario can be made.
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For this if you use SOAP Scenarios means you can have the Security settings in the SOAP Adapter itself
Please search in SDn on SOAP Adapters
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Send encrypted data from oracle 11g to Ms SQL Server 12
Hi every body,
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can we use asymetric encription to do this senario?
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What you want to do about copying data from Oracle to SQL*Server using insert will work with the 12c gateway. There was a problem trying to do this using the 11.2 gateway but it should be fixed with the 12c gateway.
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Hi ,
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I can send mail through utl_mail .
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How to send string data through socket!
Is there any method to send string data over socket.
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Comments please!Thank for your kind answer, stoopidboi.
I solved the ploblem. ^^;
I open the source code ^^; wow~~~~~!
It will useful to many people. I spend almost 3 days to solve this problem.
The program works like this.
Client side // string data ------------------------> Server side // saving file
To
< Server Side >
* Server.java
* Auther : [email protected]
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Server extends JFrame
private JTextField enter;
private JTextArea display;
ObjectInputStream input;
DataOutputStream output;
FileOutputStream resultFile;
DataInputStream inputd;
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super("Server");
Container c = getContentPane();
enter = new JTextField();
enter.setEnabled(false);
enter.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent ev){
//None
c.add(enter, BorderLayout.NORTH);
display = new JTextArea();
c.add(new JScrollPane(display),
BorderLayout.CENTER);
setSize(300, 150);
show();
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ServerSocket server;
Socket connection;
int counter = 1;
display.setText("");
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server = new ServerSocket(8800, 100);
while(true){
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connection = server.accept();
display.append( counter + " connection is ok.\n");
display.append("Connection " + counter +
"received from: " + connection.getInetAddress().getHostName());
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connection.getInputStream()
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output.close();
connection.close();
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catch(EOFException eof){
System.out.println("Client Terminate Connection");
catch(IOException io){
io.printStackTrace();
display.append("File is created!");
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app.addWindowListener(
new WindowAdapter(){
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System.exit(0);
app.runServer();
< Client side >
* Client.java
* Auther : [email protected]
package Client;
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
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Hi all,
I need to transfer large image (around 200MB) through the network to the neighborhood PCs for processing. The time i have is very short (Say 4 seconds).
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Then i have tried TCP/IP, planning to send to only one PC. There also when the size is more than 78MB, i am not able to send in single time. Is it so? But i have not seen any limitations in the documents. For 78 MB it take around 18 seconds. But the data is safe.
The great disadvantage of these two method is, i need to flatten as a string and and rebuild the image in the other end.
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Thanks,
LogicHi cc,
Yes, i was quite clear on that. The point i want to explain is - because of the limitation of the VIs (like 548 bytes for UDP & 78MB for TCP/IP) we are not able to achieve this.
I need to flatten to string the 200MB image.
I need to send this in a loop (loop delay may needed to synchronize)
I need to concatenate at the other end
Unflatten to image
Look at the timing i have send in my last mail. Its huge for UDP & TCP/IP
But the File I/O looks simple and comes closer to your calculation. In my trial i have sent 180 Mega byte image - it took 19 seconds to read from the network PC Harddisk in 100mbps line - which looks good. In a way File I/O also, should do the same (Flatten - read thru network -May be in an ideal way). Anyway, I have left with 2 questions now.
In File I/O, i need to first write image in to Harddisk of the same PC - that time going to remain the same, any ideas on reducing this? Any chance for without saving into HD - transfer?
Will it reduce directly 10 times if i go for 1Gbps? (200MB in 2 Secs?) Anything else decides this timing?
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logic -
Sending data through network takes forever
hi fellow java developper
i'm developping a program that hides files contents trough xml messages in order to exchange securily from a intranet to an extranet whitout having to use ftp and port 21. The problem is it takes over 22 seconds to send a 22k from the server and it takes about 85 seconds to receive it on the client side. this is driving me nuts because i know that delay is extremely high. IS there a way to optimized those to following methods so that the delay is reasonnably cut down
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here is my code to send and receive data,
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StringBuffer result = new StringBuffer();
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// (ridicolous, but that is what the specification says...
while( true )
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Good luck!
Daniel -
Establish connection with database to send/receive data through Xcelsius
Hi
Iu2019m working on a Xcelsius project that requires to establish 2 way communication with the SQL server.
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Iu2019m thinking of using ASPX to communicate between Xcelsius and the SQL server, but not sure how to proceed.
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Thanks,
MalikMalik,
I had worked on a similar requirement, where Sql server should be integrated with Xcelsius and should retrieve real time data.
Here is what we did...
-->Configured web service on SQL server side (you will find plenty of doc related to this on google)
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Hope this helps...
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Folks!
I need to send using SOAP a big message. Big I mean size is unknown,
sometimes it could be say several gigs.
I have implemented client program which opens input data as stream
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So the questions are:
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order as they were send by client? (I mean server-side implements interface javax.xml.messaging.ReqRespListener - so replies are guaranteed)
2) Are there any way to handle sending of big data to web service?
I do suppose that SAAJ provides kind of stream sending/receiving
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PaulDid you ever make progress down this line. I am researching how to stream multimedia within a web services infrastructure, so face similar issues to yourself
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Sending xml data through http services in adobe air
Hello every one,
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Here's my code
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<![CDATA[
import mx.controls.Alert;
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import mx.rpc.events.ResultEvent;
[Bindable]
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<TrackID>"22222222"</TrackID>
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// TODO Auto-generated method stub
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<data>
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I don't have an example for ASP, but I do for a JSP (attached).
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Matt -
How can I send post data through nsurlrequest?
Hi.
I'm working on an application which needs to make requests to a php gateway. I tried many examples I found on google, but none of them worked for me.
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Thank you.raczzoli wrote:
I'm working on an application which needs to make requests to a php gateway. I tried many examples I found on google, but none of them worked for me.
Why not?
Unfortunately, you are dealing with a number of different technologies that have been cobbled together over the years. You could write a PHP server that would respond correctly to this request, but not using basic methods like the $_POST variable. PHP was designed for HTML and true forms. What you are trying to do is make it work as a general purpose web service over the HTTP protocol. You can do that, but not with the form-centric convenience variables.
The following is a basic program that will populate the $_POST variable.
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])
@autoreleasepool
// insert code here...
NSLog(@"Hello, World!");
NSString * module = @"coolmodule";
NSString * method = @"slickmethod";
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[NSDictionary
dictionaryWithObjectsAndKeys:
module, @"module",
method, @"method",
params, @"params",
nil];
//NSString *jsonMessage = [data JSONRepresentation];
//NSData * jsonMessage =
// [NSJSONSerialization
// dataWithJSONObject: data options: 0 error: nil];
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for(NSString * key in data)
[content
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NSString * body = [content componentsJoinedByString: @"&"];
NSData * bodyData = [body dataUsingEncoding: NSUTF8StringEncoding];
NSMutableURLRequest * request =
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// [NSString stringWithFormat: @"%ld", [jsonMessage length]];
NSString * msgLength =
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[request
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[request addValue: msgLength forHTTPHeaderField: @"Content-Length"];
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[request setHTTPBody: bodyData];
NSData * requestData =
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NSString * get =
[[NSString alloc]
initWithData: requestData encoding: NSUTF8StringEncoding];
NSLog(@">%@<",get);
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I have written this type of low-level server in PHP using the Zend framework. I don't know how to do it in basic PHP and wouldn't bother to learn.
Also, you should review how you are sending data. I changed your example to send the appropriate data and content-type for the $_POST variable. If you had a server that could support something else, you could use either JSON or XML, but your data and content-type would have to match. -
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Hi there, I am new to using sockets, file/buffered input/output streams etc.
What I want to do is create an application that listens on a port for (a request) from a remote host on a socket. It should receive the request as a string.
Now lets say the request is for a file, so it expects the string request to be the file name;
Say when the request comes in, the string would be something like this
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Now the application will need to interpret that string and find the file, �myfile.txt� from a specific directory, and first send a string back (to the remote host) such as �sending myfile.txt�, followed by the actual file itself. The file would need to be buffered so that it does not cripple the network.
I have not got a clue how to do this successfully, so any help would be much appreciated.
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Problem in loading transactional data from to 0MKT_DSO1(ods) to 0MKTG_C01
Hi, I am trying to load lead transaction data to the standard Crm lead management cube from ODS.There is a problem while loading transaction data from 0MKT_DSO1(ods) to the infocube 0MKTG_C01 as the field 0STATECSYS2(CRM STATUS) is set to 10 in ods
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MSS: Cost Center in Team Viewer
I'm trying to add Cost Centres to the Team Viewer. I put 'ORG_COSTC' with Function Module HRWPC_GEN_COL_COSTCENTER into V_TWPC_ACOL_C and assigned the column group to my view. I managed to get the Cost Centre column to show up on the Team Viewer bu
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Hi, In my project, I have a task that after clicking a button say "SendEmail", mail has to be sent to the customer. How can I do this?? Any ideas plz.... Thanks, Ravindra.
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Magnifying glass search field versus initial characters scroll.
I don't want to use the "magnifying glass" search field in iTunes window. I prefer to type the first few characters and iTunes scrolls there. With most recent update, I can no longer do this. Any advice on disabling the magnifying glass? (Previously,