jsdsi-users

[Jsdsi-users] KeyPair

[<mar...@or...>]

Hi

I will save and load a KeyPair, but i can't it. I trying with this:
        KeyPair gk = jsdsi.util.KeyPairFactory.create("RSA",2048);
        FileOutputStream fos = new FileOutputStream("gk.pub");
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeObject(gk.toString());
        oos.close();

How can't I load this object and retype in a KeyPair? This code don't
work:

        KeyPair gk;
        FileInputStream fos = new FileInputStream("gk.pub");
        ObjectInputStream oos = new ObjectInputStream(fos);
        gk = (KeyPair) oos.readObject();
        oos.close();

Thanx.

               Marek Lany

RE: [Jsdsi-users] KeyPair

[Luis P. <lp...@ne...>]

Marek,

It help if u send the exact error. But try this:
	- If the error is "SPKI not found", then u have to load jsdsi
provider, i.e, jsdsi.Provider.install() and cryptix provider.

But, if your problem is a ClassCastException then u have an error on =
your
code and u should change this(following your code):

	java.security.KeyPair gk =3D jsdsi.util.KeyPairFactory.create("RSA",
2048);
	java.io.FileOutputStream fos =3D new
java.io.FileOutputStream("gde/tests/test.pub");
	java.io.ObjectOutputStream oos =3D new
java.io.ObjectOutputStream(fos);
// I have changed things here, tooked "toString()"=09
	oos.writeObject(gk);
// Doesn't make sense writing an object like gk.toString()!!
// writeObject serializes the object. U can't cast from "String" to
"KeyPair"=20
	oos.close();

	java.security.KeyPair gk;
	java.io.FileInputStream fos =3D new
java.io.FileInputStream("gde/tests/test.pub");
	java.io.ObjectInputStream oos =3D new java.io.ObjectInputStream(fos);
    	gk =3D (java.security.KeyPair)oos.readObject();
	oos.close();
=09
             -- Lu=EDs Pedro


_____________________
yahoo: lpv_pt
   msn: lp...@ne...

=20

=BB     -----Original Message-----
=BB     From: jsd...@li...=20
=BB     [mailto:jsd...@li...] On=20
=BB     Behalf Of Marek L=E1ny
=BB     Sent: quarta-feira, 11 de Agosto de 2004 19:16
=BB     To: jsd...@li...
=BB     Subject: [Jsdsi-users] KeyPair
=BB    =20
=BB     Hi
=BB    =20
=BB     I will save and load a KeyPair, but i can't it. I trying=20
=BB     with this:
=BB             KeyPair gk =3D =
jsdsi.util.KeyPairFactory.create("RSA",2048);
=BB             FileOutputStream fos =3D new FileOutputStream("gk.pub");
=BB             ObjectOutputStream oos =3D new ObjectOutputStream(fos);
=BB             oos.writeObject(gk.toString());
=BB             oos.close();
=BB    =20
=BB     How can't I load this object and retype in a KeyPair?=20
=BB     This code don't
=BB     work:
=BB    =20
=BB             KeyPair gk;
=BB             FileInputStream fos =3D new FileInputStream("gk.pub");
=BB             ObjectInputStream oos =3D new ObjectInputStream(fos);
=BB             gk =3D (KeyPair) oos.readObject();
=BB             oos.close();
=BB    =20
=BB     Thanx.
=BB    =20
=BB                    Marek Lany
=BB    =20
=BB    =20
=BB    =20
=BB     -------------------------------------------------------
=BB     SF.Net email is sponsored by Shop4tech.com-Lowest price=20
=BB     on Blank Media
=BB     100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only =
$33
=BB     Save 50% off Retail on Ink & Toner - Free Shipping and Free =
Gift.
=BB     http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
=BB     _______________________________________________
=BB     Jsdsi-users mailing list
=BB     Jsd...@li...
=BB     https://lists.sourceforge.net/lists/listinfo/jsdsi-users

Re: [Jsdsi-users] KeyPair

[Sean R. <sra...@ae...>]

Luis Pedro wrote:

>Marek,
>
>It help if u send the exact error. But try this:
>	- If the error is "SPKI not found", then u have to load jsdsi
>provider, i.e, jsdsi.Provider.install() and cryptix provider.
>
>But, if your problem is a ClassCastException then u have an error on your
>code and u should change this(following your code):
>
>	java.security.KeyPair gk = jsdsi.util.KeyPairFactory.create("RSA",
>2048);
>	java.io.FileOutputStream fos = new
>java.io.FileOutputStream("gde/tests/test.pub");
>	java.io.ObjectOutputStream oos = new
>java.io.ObjectOutputStream(fos);
>// I have changed things here, tooked "toString()"	
>	oos.writeObject(gk);
>// Doesn't make sense writing an object like gk.toString()!!
>// writeObject serializes the object. U can't cast from "String" to
>"KeyPair" 
>	oos.close();
>
>	java.security.KeyPair gk;
>	java.io.FileInputStream fos = new
>java.io.FileInputStream("gde/tests/test.pub");
>	java.io.ObjectInputStream oos = new java.io.ObjectInputStream(fos);
>    	gk = (java.security.KeyPair)oos.readObject();
>	oos.close();
>	
>             -- Luís Pedro
>
>
>_____________________
>yahoo: lpv_pt
>   msn: lp...@ne...
>
> 
>
>»     -----Original Message-----
>»     From: jsd...@li... 
>»     [mailto:jsd...@li...] On 
>»     Behalf Of Marek Lány
>»     Sent: quarta-feira, 11 de Agosto de 2004 19:16
>»     To: jsd...@li...
>»     Subject: [Jsdsi-users] KeyPair
>»     
>»     Hi
>»     
>»     I will save and load a KeyPair, but i can't it. I trying 
>»     with this:
>»             KeyPair gk = jsdsi.util.KeyPairFactory.create("RSA",2048);
>»             FileOutputStream fos = new FileOutputStream("gk.pub");
>»             ObjectOutputStream oos = new ObjectOutputStream(fos);
>»             oos.writeObject(gk.toString());
>»             oos.close();
>»     
>»     How can't I load this object and retype in a KeyPair? 
>»     This code don't
>»     work:
>»     
>»             KeyPair gk;
>»             FileInputStream fos = new FileInputStream("gk.pub");
>»             ObjectInputStream oos = new ObjectInputStream(fos);
>»             gk = (KeyPair) oos.readObject();
>»             oos.close();
>»     
>»     Thanx.
>»     
>»                    Marek Lany
>»     
>»     
>»     
>»     -------------------------------------------------------
>»     SF.Net email is sponsored by Shop4tech.com-Lowest price 
>»     on Blank Media
>»     100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
>»     Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
>»     http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
>»     _______________________________________________
>»     Jsdsi-users mailing list
>»     Jsd...@li...
>»     https://lists.sourceforge.net/lists/listinfo/jsdsi-users
>
>
>
>-------------------------------------------------------
>SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
>100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
>Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
>http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
>_______________________________________________
>Jsdsi-users mailing list
>Jsd...@li...
>https://lists.sourceforge.net/lists/listinfo/jsdsi-users
>
>
>  
>
Marek, did Luis help you out?

An alternative is to use jsdsi.sexp.ObjOutputStream and 
jsdsi.sexp.ObjInputStream instead of the java.io.ObjectXxxStream classes 
though both approaches should work (with Luis's suggestions).

Sean

-- 
Dr. Sean Radford, MBBS, MSc
sra...@ae...
http://www.aegeus-technology.com/