"crino" <cseverini.nospam@gmail.com> wrote in message
news:1164363514.012036.293880@k70g2000cwa.googlegroups.com...
> Hi,
> i'm trying to encrypt data with a publickey exctracted from certificate
>
> file but i got error!?
> this is my code:
>
> using Microsoft.Web.Services3.Security.X509;
> using System.Security.Cryptography.X509Certificates;
> using System.Security.Cryptography;
>
>
> //exctract the key
> X509Certificate2 certp = new X509Certificate2(Server.MapPath(".") +
> "\\mycert.cer");
> RSACryptoServiceProvider rsa =
> (RSACryptoServiceProvider)X509Util.GetKey(cert);
>
>
> //encrypt data
> byte[] enc = rsa.Encrypt(barray, false);  //barray is the byte array of
>
> my data to encrypt
>
>
> Anyone can help me?
> Is quite urgenge :-P
>
>
> Thanks in advance
>

> You don't encrypt bulk data with RSA keys.  RSA is for encrypting small
> amounts of data, generally other encryption keys used in symmetric
> encryption.  Typically, you would want to do something like creating an
> enveloped CMS message, as it takes care of these details for you.  Check out
> the Pkcs namespace in .NET 2.0.
>
> You also don't say what error you got (which would have been helpful), but
> based on your code, it looks like you are going in the wrong direction
> anyway.
>
> Joe K.
>
> --
> Joe Kaplan-MS MVP Directory Services Programming
> Co-author of "The .NET Developer's Guide to Directory Services Programming"
> http://www.directoryprogramming.net
> --
> "crino" <cseverini.nospam@gmail.com> wrote in message
> news:1164363514.012036.293880@k70g2000cwa.googlegroups.com...
> > Hi,
> > i'm trying to encrypt data with a publickey exctracted from certificate
> >
> > file but i got error!?
> > this is my code:
> >
> > using Microsoft.Web.Services3.Security.X509;
> > using System.Security.Cryptography.X509Certificates;
> > using System.Security.Cryptography;
> >
> >
> > //exctract the key
> > X509Certificate2 certp = new X509Certificate2(Server.MapPath(".") +
> > "\\mycert.cer");
> > RSACryptoServiceProvider rsa =
> > (RSACryptoServiceProvider)X509Util.GetKey(cert);
> >
> >
> > //encrypt data
> > byte[] enc = rsa.Encrypt(barray, false);  //barray is the byte array of
> >
> > my data to encrypt
> >
> >
> > Anyone can help me?
> > Is quite urgenge :-P
> >
> >
> > Thanks in advance
> >

"crino" <cseverini.nospam@gmail.com> wrote in message
news:1164389907.706969.30820@j72g2000cwa.googlegroups.com...
> hi Joe :)
> barray is just 1024bit.
> Error is 'The key state is not viled' or something like this (i don't
> get english message)
> Anyway my goal is just encrypt barray (1024bit) with the publickey
> extracted from certificate file.
> Any idea?
>
>
> Joe Kaplan ha scritto:
>
>> You don't encrypt bulk data with RSA keys.  RSA is for encrypting small
>> amounts of data, generally other encryption keys used in symmetric
>> encryption.  Typically, you would want to do something like creating an
>> enveloped CMS message, as it takes care of these details for you.  Check
>> out
>> the Pkcs namespace in .NET 2.0.
>>
>> You also don't say what error you got (which would have been helpful),
>> but
>> based on your code, it looks like you are going in the wrong direction
>> anyway.
>>
>> Joe K.
>>
>> --
>> Joe Kaplan-MS MVP Directory Services Programming
>> Co-author of "The .NET Developer's Guide to Directory Services
>> Programming"
>> http://www.directoryprogramming.net
>> --
>> "crino" <cseverini.nospam@gmail.com> wrote in message
>> news:1164363514.012036.293880@k70g2000cwa.googlegroups.com...
>> > Hi,
>> > i'm trying to encrypt data with a publickey exctracted from certificate
>> >
>> > file but i got error!?
>> > this is my code:
>> >
>> > using Microsoft.Web.Services3.Security.X509;
>> > using System.Security.Cryptography.X509Certificates;
>> > using System.Security.Cryptography;
>> >
>> >
>> > //exctract the key
>> > X509Certificate2 certp = new X509Certificate2(Server.MapPath(".") +
>> > "\\mycert.cer");
>> > RSACryptoServiceProvider rsa =
>> > (RSACryptoServiceProvider)X509Util.GetKey(cert);
>> >
>> >
>> > //encrypt data
>> > byte[] enc = rsa.Encrypt(barray, false);  //barray is the byte array of
>> >
>> > my data to encrypt
>> >
>> >
>> > Anyone can help me?
>> > Is quite urgenge :-P
>> >
>> >
>> > Thanks in advance
>> >
>

> My recollection of RSA is that you can only encrypt up to key length - 11
> bits of data with RSA.  Does it work if you try a smaller set of data?
> Otherwise, I don't know.
>
> Joe K.
>
> --
> Joe Kaplan-MS MVP Directory Services Programming
> Co-author of "The .NET Developer's Guide to Directory Services Programming"
> http://www.directoryprogramming.net
> --
> "crino" <cseverini.nospam@gmail.com> wrote in message
> news:1164389907.706969.30820@j72g2000cwa.googlegroups.com...
> > hi Joe :)
> > barray is just 1024bit.
> > Error is 'The key state is not viled' or something like this (i don't
> > get english message)
> > Anyway my goal is just encrypt barray (1024bit) with the publickey
> > extracted from certificate file.
> > Any idea?
> >
> >
> > Joe Kaplan ha scritto:
> >
> >> You don't encrypt bulk data with RSA keys.  RSA is for encrypting small
> >> amounts of data, generally other encryption keys used in symmetric
> >> encryption.  Typically, you would want to do something like creating an
> >> enveloped CMS message, as it takes care of these details for you.  Check
> >> out
> >> the Pkcs namespace in .NET 2.0.
> >>
> >> You also don't say what error you got (which would have been helpful),
> >> but
> >> based on your code, it looks like you are going in the wrong direction
> >> anyway.
> >>
> >> Joe K.
> >>
> >> --
> >> Joe Kaplan-MS MVP Directory Services Programming
> >> Co-author of "The .NET Developer's Guide to Directory Services
> >> Programming"
> >> http://www.directoryprogramming.net
> >> --
> >> "crino" <cseverini.nospam@gmail.com> wrote in message
> >> news:1164363514.012036.293880@k70g2000cwa.googlegroups.com...
> >> > Hi,
> >> > i'm trying to encrypt data with a publickey exctracted from certificate
> >> >
> >> > file but i got error!?
> >> > this is my code:
> >> >
> >> > using Microsoft.Web.Services3.Security.X509;
> >> > using System.Security.Cryptography.X509Certificates;
> >> > using System.Security.Cryptography;
> >> >
> >> >
> >> > //exctract the key
> >> > X509Certificate2 certp = new X509Certificate2(Server.MapPath(".") +
> >> > "\\mycert.cer");
> >> > RSACryptoServiceProvider rsa =
> >> > (RSACryptoServiceProvider)X509Util.GetKey(cert);
> >> >
> >> >
> >> > //encrypt data
> >> > byte[] enc = rsa.Encrypt(barray, false);  //barray is the byte array of
> >> >
> >> > my data to encrypt
> >> >
> >> >
> >> > Anyone can help me?
> >> > Is quite urgenge :-P
> >> >
> >> >
> >> > Thanks in advance
> >> >
> >

"crino" <cseverini.nospam@gmail.com> wrote in message
news:1164449454.808045.241310@j44g2000cwa.googlegroups.com...
| just 11bit?? (1 byte!)
| I'll try anyway i just need to decode this java code:
| Signature sigVer = Signature.getInstance("SHA1withRSA");
| sigVer.initVerify(publicKey);
| sigVer.update(barrayToEncrypt);
| result = sigVer.verify(barrayToVerify);
|
| Any idea??
|
|
| Joe Kaplan ha scritto:
|
| > My recollection of RSA is that you can only encrypt up to key length -
11
| > bits of data with RSA.  Does it work if you try a smaller set of data?
| > Otherwise, I don't know.
| >
| > Joe K.
| >
| > --
| > Joe Kaplan-MS MVP Directory Services Programming
| > Co-author of "The .NET Developer's Guide to Directory Services
Programming"
| > http://www.directoryprogramming.net
| > --
| > "crino" <cseverini.nospam@gmail.com> wrote in message
| > news:1164389907.706969.30820@j72g2000cwa.googlegroups.com...
| > > hi Joe :)
| > > barray is just 1024bit.
| > > Error is 'The key state is not viled' or something like this (i don't
| > > get english message)
| > > Anyway my goal is just encrypt barray (1024bit) with the publickey
| > > extracted from certificate file.
| > > Any idea?
| > >
| > >
| > > Joe Kaplan ha scritto:
| > >
| > >> You don't encrypt bulk data with RSA keys.  RSA is for encrypting
small
| > >> amounts of data, generally other encryption keys used in symmetric
| > >> encryption.  Typically, you would want to do something like creating
an
| > >> enveloped CMS message, as it takes care of these details for you.
Check
| > >> out
| > >> the Pkcs namespace in .NET 2.0.
| > >>
| > >> You also don't say what error you got (which would have been
helpful),
| > >> but
| > >> based on your code, it looks like you are going in the wrong
direction
| > >> anyway.
| > >>
| > >> Joe K.
| > >>
| > >> --
| > >> Joe Kaplan-MS MVP Directory Services Programming
| > >> Co-author of "The .NET Developer's Guide to Directory Services
| > >> Programming"
| > >> http://www.directoryprogramming.net
| > >> --
| > >> "crino" <cseverini.nospam@gmail.com> wrote in message
| > >> news:1164363514.012036.293880@k70g2000cwa.googlegroups.com...
| > >> > Hi,
| > >> > i'm trying to encrypt data with a publickey exctracted from
certificate
| > >> >
| > >> > file but i got error!?
| > >> > this is my code:
| > >> >
| > >> > using Microsoft.Web.Services3.Security.X509;
| > >> > using System.Security.Cryptography.X509Certificates;
| > >> > using System.Security.Cryptography;
| > >> >
| > >> >
| > >> > //exctract the key
| > >> > X509Certificate2 certp = new X509Certificate2(Server.MapPath(".") +
| > >> > "\\mycert.cer");
| > >> > RSACryptoServiceProvider rsa =
| > >> > (RSACryptoServiceProvider)X509Util.GetKey(cert);
| > >> >
| > >> >
| > >> > //encrypt data
| > >> > byte[] enc = rsa.Encrypt(barray, false);  //barray is the byte
array of
| > >> >
| > >> > my data to encrypt
| > >> >
| > >> >
| > >> > Anyone can help me?
| > >> > Is quite urgenge :-P
| > >> >
| > >> >
| > >> > Thanks in advance
| > >> >
| > >
|