java-programmer >>How to create same RSA signature objects in Java and C#

How to create same RSA signature objects in Java and C#

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- 2
  - [longish] Re: help errors[newbie]Madhur Ahuja <email***@***.com> wrote:
    > Below is a simple program, which produces couple of errors.
    > E:\programs\java1\concept\inner1.java:33: <identifier> expected
    > t.somefunc(tt);
    > ^
    > E:\programs\java1\concept\inner1.java:33: package t does not exist
    > t.somefunc(tt);
    > ^
    > 2 errors
    >
    > I cant seem to find the reason for these errors. Can anyone help
    > me out.
    
    Sure. Beware though, that I have a lot of remarks; also about coding
    style and readability. It's a long read, but worth it (IMNSHO).
    
    >
    > public class inner1
    
    - This name is confusing: it is an outer class with "inner" in the name...
    - Please start class names with an upper case letter as in the JDK; when
    most Java programmers read a name starting with a lowercase letter, they
    expect a variable.
    
    > {
    >
    > public static void main(String args[])
    > {
    > new test1();
    > }
    > }
    
    This main method does nothing, unless you do everything in the
    constructor. That is, your program runs when you create an object. This is
    confusing.
    
    >
    >
    > class test
    > {
    >
    > private int a;
    > test(int n)
    > {
    > a=n;
    >
    > }
    
    This indentation is hard to read; you may use a bit more: 4 spaces or so.
    If you run into the right margin, your code is most likely too complex.
    
    Note that indentation, brace style, etc. is very personal, and has caused
    many "holy wars" in the past. However, if it's readable, it's good.
    Otherwise, it isn't. Opinions differ on what's readable though...
    
    >
    > void somefunc(test a)
    > {
    > a.a++;
    > System.out.println(a.a);
    > }
    >
    > }
    >
    > class test1
    > {
    > test t=new test(3);
    > test tt=new test(4);
    > t.somefunc(tt);
    >
    > }
    
    This is the heart of the problem:
    - t and tt are member variables, as they are defined outside any code
    block.
    - t.somefunc(tt) is a method call, but is outside a method, constructor or
    even an initializer block. The compiler is expecting a definition for a
    member variable, constructor, method or initializer.
    
    You could make it work in several ways. Your goal is to understand why
    option 2 is preferable.
    
    Option 1:
    - Double the braces in the definition of class test1. This creates an
    initializer block that makes the lines inbetween into an anonymous
    constructor that is always called when instantiating this class.
    
    Option 2:
    - Change the content of inner1#main(String[]) to:
    test1 testObject = new test1();
    testObject.callMethod();
    - Perform the change of option 1.
    - Between the two opening braces of the class test1, add this:
    public void callMethod()
    - Reformat the code (especially the class test1).
    
    Regardless of which solution you choose, I advise you to read up on Sun's
    coding conventions. Note they're just guidelines: you don't have to agree
    with them. However, it helps if you follow them.
    The URI is: http://java.sun.com/docs/codeconv/html/CodeConvTOC.doc.html
    
    Following them won't make you a better programmer, but it will help both
    you and others to understand your code more easily. This in turn enables
    you to get help more easily, and thus learn more.
    
    --
    Oscar Kind http://home.hccnet.nl/okind/
    Software Developer for contact information, see website
    
    PGP Key fingerprint: 91F3 6C72 F465 5E98 C246 61D9 2C32 8E24 097B B4E2
- 2
  - passing utf strings to java from c in jni??hi...
    
    i've managed to far to pass a string to java from c..
    
    but now i wanna pass a hebrew string, and as i hardcode it in c, i get
    question marks on the java side.
- 2
  - Translator Tools? I was about to throw in the towel on this
    project I've inherited. It's about 5,000
    Java files, totally undocumented and uncommented.
    
    I asked and looked for tools that would help
    me make sense of this mess, so far to no avail.
    
    Now the owner of the company is willing to
    consider redoing it in C++. ( In my opinion
    there was no good reason for the previous software
    engineer to write this in Java. It's a pretty
    straightforward Windows desktop app that would
    be much easier to understand and maintain had
    it been written in VC++. There's some evidence
    he chose Java just so he could get some experience
    with it,)
    
    Anyhow, I'm not rewriting this by hand.
    I came across the following in Bruce Eckel's
    'Thinking In Java', "I've even heard it
    suggested that you start with Java, to gain the
    short development time, then use a tool and support
    libraries to translate your code to C++, if
    you need faster execution speed."
    
    Has anybody heard of or better still used
    such translator tools? Even if it only did
    80-90% and the rest required manual intervention
    it might work.
    
    TIA for any advice.
    
    Gerry Murphy
- 3
  - JWS consoleRoedy Green wrote:
    
    > Is there a way to view the console or System.err with Java webstart
    > apps?
    >
    
    File > Preferences > Advanced tab, then select "Show Java Console"
    
    - Alistair
- 4
  - Difficulty resizing window inside an AppletHi all,
    
    I have a Java puzzle written as an applet that I've been working on. So far
    I've never been able to figure out how to resize it from inside the applet
    itself.
    
    So I created a very elaborate HTML file, where I use JavaScript which:
    1. queries the screen resolution and browser,
    2. dynamically opens a window based on the values returned from (1),
    3. dynamically writes the applet/object tag to that window also based on
    (1).
    
    I'd love to get rid of this complicated mess of html/js code and do it from
    pure Java if I can. For one thing, having two page refreshes is slow for the
    user. I've tried setSize() and setBounds from every component level I can
    think of. There are never any errors but it never works either. I noticed
    that resize() works from inside a JDialog, but not from JPanel. I'd be happy
    to use a JDialog to hold the JPEG image, instead of JPanel, but that doesn't
    seem to work.
    
    Also, I'd love to be able to resize on the fly. Is it a big deal to trap the
    window/resize event to allow the user to set the size?
    
    I'd greatly appreciate any thoughts or ideas you may have.
    
    Best regards,
    
    Dave
- 5
  - jdk1.4.2 & fontsWe seem to be missing some fonts:
    
    hal% ll /usr/local/jdk1.4.2/jre/lib/fonts/
    total 2156
    -rw-r--r-- 1 root wheel 75144 Nov 13 01:05 LucidaBrightDemiBold.ttf
    -rw-r--r-- 1 root wheel 75124 Nov 13 01:05 LucidaBrightDemiItalic.ttf
    -rw-r--r-- 1 root wheel 80856 Nov 13 01:05 LucidaBrightItalic.ttf
    -rw-r--r-- 1 root wheel 344908 Nov 13 01:05 LucidaBrightRegular.ttf
    -rw-r--r-- 1 root wheel 317896 Nov 13 01:05 LucidaSansDemiBold.ttf
    -rw-r--r-- 1 root wheel 698236 Nov 13 01:05 LucidaSansRegular.ttf
    -rw-r--r-- 1 root wheel 234068 Nov 13 01:05 LucidaTypewriterBold.ttf
    -rw-r--r-- 1 root wheel 242700 Nov 13 01:05 LucidaTypewriterRegular.ttf
    -rw-r--r-- 1 root wheel 6153 Nov 13 01:05 fonts.dir
    
    hal% ll /usr/local/linux-sun-jdk1.4.2/jre/lib/fonts/
    total 2716
    -r--r--r-- 1 root wheel 75144 Aug 19 23:53 LucidaBrightDemiBold.ttf
    -r--r--r-- 1 root wheel 75124 Aug 19 23:53 LucidaBrightDemiItalic.ttf
    -r--r--r-- 1 root wheel 80856 Aug 19 23:53 LucidaBrightItalic.ttf
    -r--r--r-- 1 root wheel 344908 Aug 19 23:53 LucidaBrightRegular.ttf
    -r--r--r-- 1 root wheel 317896 Aug 19 23:53 LucidaSansDemiBold.ttf
    -r--r--r-- 1 root wheel 91352 Aug 19 23:53 LucidaSansDemiOblique.ttf
    -r--r--r-- 1 root wheel 253724 Aug 19 23:53 LucidaSansOblique.ttf
    -r--r--r-- 1 root wheel 698236 Aug 19 23:53 LucidaSansRegular.ttf
    -r--r--r-- 1 root wheel 234068 Aug 19 23:53 LucidaTypewriterBold.ttf
    -r--r--r-- 1 root wheel 63168 Aug 19 23:53 LucidaTypewriterBoldOblique.ttf
    -r--r--r-- 1 root wheel 137484 Aug 19 23:53 LucidaTypewriterOblique.ttf
    -r--r--r-- 1 root wheel 242700 Aug 19 23:53 LucidaTypewriterRegular.ttf
    -r--r--r-- 1 root wheel 6153 Aug 19 23:53 fonts.dir
    
    --
    Panagiotis Astithas
    Electrical & Computer Engineer, PhD
    Network Management Center
    National Technical University of Athens, Greece
    
    _______________________________________________
    email***@***.com mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
- 8
  - Eclipse jboss toolsHi,
    has been any efforts to ports jboss tools plugin for Eclipse?
    It contains some parts written in C (i think having to do with GUI editors).
    Using eclipse-devel 3.3.2 and jboss tools 2.1.1 (previously known as JBossIDE and
    now commercially named as "Jboss developer studio).
    
    Installing the jboss tools plugins from within eclipse, asis, results in a highly unstable eclipse
    environment.
    
    Any ideas?
    --
    Achilleas Mantzios
    _______________________________________________
    email***@***.com mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
- 9
  - how can write my servlet in weblogichai,
    
    i new to weblogic environment.
    
    i tryed the examples that are mentioned in sample directory of
    weblogic.
    
    i need for this purpose to start example server in order to see the out
    put.
    
    my question is how to write my own examples in my own directory and
    execute them
    
    instead of using sample server.
    
    Thanks in advance.
- 10
  - Eclipse 2.1.1 does not save my workspaceHi,
    
    Sometimes when I close out Eclipse 2.1.1, it doesn't say my worksapce
    settings. Because of this, I cant find projects that I create prior
    to this happening
    
    Can anyone shed some light on this issue?
    
    Thank You
- 11
  - Sending email in multiple languagesWe're trying to send out HTML emails in multiple languages
    (English and Chinese (simplified and traditional)).
    
    The subject as well as the body may contain multi-byte
    characters.
    
    We're having trouble making the email readable for all audiences.
    Outlook (back to 2003)
    On English computer
    On Chinese computer
    Hotmail
    on IE with a chinese (simpl or trad) locale
    on Firefox with a chinese (simpl or trad) locale
    Yahoo mail
    on IE with a chinese (simpl or trad) locale
    on Firefox with a chinese (simpl or trad) locale
    
    So far we're base64 encoding with a multipart doc type and
    encoding with Big5 or GB1208 depending on the user's locale.
    (UTF-8 didn't work very well).
    
    Is there a mostly-universal way of doing this?
    
    Tara
- 12
  - Java String.replaceAll() not behaving as expectedGiven a string "s", I'd like to convert all the line separators into
    their "escaped" string equivalents. i.e. a dos/windows newline gets
    converted into the literal string "\r\n".
    
    I tried this in my java code...
    
    s = s.replaceAll("\n", "\\n");
    s = s.replaceAll("\r", "\\r");
    
    but I end up with "rn" instead of "\r\n"
    
    I assume the problem has something to do with the regex pattern
    replacement but it seems like it should work.
    
    What am I doing wrong?
    
    ...
    Krick
- 16
  - Run your own Auction Site, Pay per click directory, Google groups email harvestor, Email spider nowFree download full version , all products from Mewsoft dot com
    
    http://netauction10.url4life.com/
    
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    Groupawy
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    online web pages, Filter lists, Merge lists, Remove unsubscribe lists
    from lists, Splitter to split larg email list file to smaller files,
    Deduplicator to remove duplicated emails.
- 16
  - db connectionsGuys,
    
    In a a stateful session bean I'm looking up a data source that wraps a
    connection pool and using it to retrieve a connection.
    How do I return the connection to the pool when I'm done? Is conn.close()
    the right thing to do here?
    
    If I just let it go out of scope I eventually get an exception in the pool
    with an "out of resources" error.
- 16
  - BoundingSphereHi all!
    I have a little ask..how can i create a bounding sphere on a Sphere object.
    Sphere gives me only the radius, how can i get the centre?
    Andrea Todeschini
- 16
  - java.net.ServerSocket doesn't catch every connectionHi,
    
    My problem is that ServerSocket.accept doesn't catch every connection
    made to the socket.
    I wrote a little server that gets a connection and spawns a new thread
    giving the ServerSocket as parameter to the constructor. Then the
    Thread is start()'ed.
    
    The Code is:
    
    ServerSocket serversock = new ServerSocket(port);
    while (true) {
    Socket socket = serversock.accept();
    HandleSocket hs = new HandleSocket(socket);
    hs.start();
    }
    
    But this code does not catch every connection that will be made to it
    and I get a timeout with
    the client application. If I retry connection it often works, but the
    problem happens randomly.
    I can't find anything, that could cause this problem. I'm really a bit
    disappointed. I wrote the same application with C++ and had no
    problems. But I need it platform independent, thats why I want to use
    Java.
    
    Anyone had this problem before? Can anyone help me?
    
    Thanks in advance
    - Michael

Author

Message

robert.dodier

Posted: 2006-6-12 11:27:00

Top

java-programmer, How to create same RSA signature objects in Java and C# Hello,

I have looked through the documentation for the Java and C#
security classes, and I can't find an answer to the following question.

How can the same RSA signature object (class java.security.Signature in
Java
and System.Security.Cryptography.RSACryptoServiceProvider in C#)
be constructed?

What I would like to see is that signatures generated in Java are
recognized as valid by C#, and vice versa. I am assuming this implies
that the RSA signature parameters must be the same in both
languages, but I can't figure out how to make that happen.

According to some sketchy notes I've found through googling,
it is possible, so I'll keep trying. Thanks for any information.

Robert Dodier

Index ‹ java-programmer

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- 1
  - Eclipse 3.1 crash on sun's jvmHi list,
    
    Eclipse just crashed the jvm when I ran it.
    
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    since this happened to me twice on two different machines, I think it
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    --
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    June 25. Sony will prime the pump for the player's debut by issuing
    its
    first seven Blu-ray disc titles tomorrow, June 20; Lionsgate will
    launch its
    support for Blu-ray with another six titles on June 27.
    
    Samsung plans to have its player in over 2,000 storefronts nationwide,
    including such major chains as Best Buy and Circuit City. In
    conjunction
    with Sony, the companies will also provide demo players and discs to
    retailers to offer side-by-side comparisons with rival HD DVD in order
    to
    subjectively sell the format to potential consumers.
    
    The electronics manufacturer also claims that interest in the BD-P1000
    and
    Blu-ray so far has been strong. "Pre-orders have been incredible,"
    Samsung
    spokesman Jose Cardona told Video Business.
    
    ---------------------------------------------
    
    http://www.tgdaily.com/2006/06/20/sony_pictures_blu-ray_movies_today/
    
    With Toshiba having launched its HD-A1 and HD-XA1 HD DVD videodisc
    players
    in April, Samsung is preparing to be the first brand to formally
    launch a
    competitive Blu-ray Disc player in North America, with its BD-P1000
    set to
    premiere on Sunday. Despite that firm date, customers nationwide are
    already reporting having purchased BD-P1000s from Best Buy store
    shelves -
    just sitting there nonchalantly like any other DVD player, as if shelf
    stockers didn't know the difference. But today, those early adopters
    will
    finally be able to play real BD media - not just upconverted SD media
    - as
    Sony Pictures releases the first batch of BD movies today.
    
    Video outlets today should already have received, and will likely have
    displays ready for, 50 First Dates (Adam Sandler, Drew Barrymore),
    Hitch
    (Will Smith), House of Flying Daggers, the original Terminator, the
    sci-fi
    "new cult classic" The Fifth Element (Bruce Willis), Underworld
    Evolution,
    and XXX (the film, not the rating). One title, A Knight's Tale,
    originally
    scheduled for release today, is being pushed back to 25 July. The
    high-energy motorcycle violence film Ultraviolet joins the line-up
    next
    Tuesday. Lion's Gate Home Entertainment is due to follow up next
    Tuesday
    with the BD releases of 2006 Best Picture Crash, Terminator 2:
    Judgment Day,
    the horror flick Saw, Lord of War (Nicholas Cage), and the Marvel
    Comics
    vigilante piece The Punisher.
    
    ------------------------------------------------------------------
    
    Java: Brave New Disc-Authoring World
    http://www.pcworld.com/news/article/0,aid,126163,00.asp
    
    Blu-ray Disc relies on BD-Java (BD-J) for its disc-authoring
    environment;
    HD DVD uses Microsoft's XML-based iHD, or Internet High Definition. "I
    think
    BD-J is better future-proofed," says Eklund. "But it is complex," and
    implementing it properly will take more time, he says.
    
    The switch to BD-J required adding programmers and engineers to the
    disc-production mix.
    BD-J has two different profiles. Sony's first content will be in what
    Eklund
    refers to as BD-MV, or "movie mode." "The menus will still be quite
    different than what you're accustomed to with DVD," he promises.
    "BD-MV is a
    powerful format for creating interactive menus, and it will give a
    better,
    more seamless experience than what users are getting from DVD. You
    don't
    have to jump around between menu pages as you do with DVD. We use a
    graphics
    layer to present all of the text information, so you don't have to go
    back
    and access the disc in order to access the menus. We also have a tool
    called
    a pop-up menu that the user can use to access disc features during the
    movie's playback, so, for example, you can get to a commentary track."
    
    As powerful as BD-MV is, it has its limitations. "We are currently
    still
    investigating how we're going to author picture-in-picture content,"
    says
    Eklund. "But I'm sure we will be exploring that later on in the year."
- 12
  - Java server accessI have a javaApplet that needs to access a directory on the server, list
    the files in directory, then access the selected file. My first idea
    was to use a servlet on the server then I found out that the server that
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    support.
    Can anyone give me an idea on how to go about this?
    
    David Miller
- 13
  - Database access for server and clientI am trying to create a small Internet application to access a mySQL
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    database and send the query result to our web server and then process
    further data on the web server. Here is the layout: There are
    several client machines around the country that have a mySQL database
    installed and will give us certain query privileges for this database.
    I need users on these client machines to be able to run an Internet
    application from our web server which queries their local database and
    then sends information to our server.
    
    I see two options: a trusted, signed applet or a full java application
    - also digitally signed - that is deployed through the Java Web Start
    technology. (This is a very simple query on the client with a simple
    drop-down list for the user to select from the query result - nothing
    complicated.)
    
    Does anybody have any suggestion as to which method is preferable? The
    end users who will be running this application are not very computer
    savvy and might not be able to figure out browser messages like "Your
    browser understands the <APPLET> tag but isn't running the applet, for
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    might be preferable, but I have no idea how reliable this method is and
    what kind of kinks I will have to work through.
    
    I also wonder if the Microsoft .net environment might offer an
    alternative (our web server is Microsoft IIS and the clients are all
    Windows XP or Windows 2000).
    
    Any thoughts?
    
    Thank you.
    Anke
- 14
  - Displaying error values with Struts Validator FrameworkHi,
    
    I'm using the struts validator framework to validate an email address
    in a form.
    If the user enters an invalid email address (ie
    invalidEmailAddress.com) I'd like to display the following error
    message:-
    
    "invalidEmailAddress.com is an invalid e-mail address"
    
    However all I seem to be able to do with the validator framework is
    output the following:-
    
    "Email address is an invalid e-mail address"
    
    with messageResources.properties and validator.xml set as follows:-
    
    validator.xml:-
    <form name="addressForm">
    <field property="emailAddress"
    depends="email">
    <msg name="email" key="errors.email" />
    <arg name="email" key="form.address.label.emailAddress" />
    </field>
    </form>
    
    messageResources.properties:-
    errors.email={0} is an invalid e-mail address.
    form.address.label.emailAddress=Email address
    
    I'm using <html:errors /> to output the error list in a jsp.
    
    Is there any way to substitute the actual entered value into the
    errors.email message using the struts validator framework? I know it
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    Thanks in advance for your help.
    smrimell.
- 15
  - Design question: business delegate or not?L.S.,
    
    We're in the process of developing an application using JSF, Hibernate and Spring and we're facing a design question on which we would like your ideas.
    The application has it's own database, which is accessed using Hibernate, for most of it's entities (e.g. Problem), but it also has to work with data from a legacy system.
    
    The legacy data is accessed through a set of Spring components (<bean/>s), which use JMS to exchange XML messages with the legacy system. These services provide us with e.g. Article instances.
    
    The Problem instances, which are retrieved using Hibernate, should hold a reference to an Article. Since Hibernate does not know about the Article class, we have added an articleId property to the Problem class and whenever we retrieve a Problem using our ProblemService class, the ProblemService will look at this property and retrieves the corresponding Article instance.
    This process happens for a couple of entities (Article, Supplier, TracingInformation, ...)
    
    This approach however has a number of drawbacks:
    1) our Problem class contains several 'duplicate' properties: articleId/article, supplierId/supplier,... leading to confusion
    2) resolving the correct Article, Supplier, ... instances happens for every Problem ever instantiated in the ProblemService, causing overhead whever the information is not required by the JSF web client (especially for lists of data)
    3) whenever someone adds functionality to the ProblemService, we have to be careful to always fill in the missing entities when a new Problem instance is created
    
    We have thought of two possible solutions so far:
    
    1) creating a Hibernate UserType to convert the article id stored in the database to an Article instance and visa versa
    - This approach would solve drawbacks 1 and 3, but doesn't help us much with drawback 2.
    - There is another issue with this approach: we need Spring's ApplicationContext in our UserType (<type .../> declaration in Hibernate mapping), but this would require rebuilding the ApplicationContext or having some kind of singleton to obtain the ApplicationContext (it is now created by a web application listener) (unless there is a Spring way of doing this, e.g. using a TypeDefinitionBean)
    
    2) creating a business delegate for the Problem class
    - This would solve all drawbacks, since the business delegate could quite easily use the Spring components already available to retrieve an Article instance on the fly when needed
    - The business delegate should only have to expose the article property and the object sent to our DAO should only contain the articleId
    - The business delegate solve the resolving of the Article, Supplier, ... entities once and for all, so nobody can forget to add these to their newly created Problem instance
    
    The 'Business Delegate' solution seems the most appropriate, but wouldn't it add a considerable amount of extra coding for the features it provides?
    Which solution would you recommend? Do you see an easier solution for the problem?
    
    Thank you in advance for any feedback,
    
    Gert Vanthienen
    email***@***.com