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microsoft.public.dotnet.framework

RSACryptoServiceProvider Encrypt/Decrypt

TJ

10/14/2008 1:13:00 AM

Hi,

I have a data has been encrypted by RSACryptoServiceProvider.
I know that this data has been encrypted by passing true in fOAEP paramenter
in Encrypt method.

fOAEP
Type: System..::.Boolean

true to perform direct RSA encryption using OAEP padding (only available on
a computer running Microsoft Windows XP or later); otherwise, false to use
PKCS#1 v1.5 padding.

As you see, true means that it is only available for XP or later.
I have private key, but I don't have source code to access this encryption
part.

I need to access this encrypted data from our mobile solution which is .NET
Compact Framework 2.0.
In Decrypt method, of course, I need to pass same true value to the fOAEP
paramter in order to get the decrypted data, however, true can't be passed
since this is Pocket PC platform, which is Compact Framework 2.0...

Is there anyway I can get the decrypted data from CF 2.0?
Only one way I can think of is to create a web service/server component
whatever sitting on the desktop, then the PocketPC needs to get the decrypted
data from that service... However, if possible, I would like to avoid to
create extra layer...

Any idea?

Thanks,
1 Answer

Naked Gonad

11/24/2008 2:22:00 PM

0

Eli Grubman wrote:
> On Mon, 24 Nov 2008 12:50:39 +0000, Naked Gonad
> <bodron57@tiscali.co.uk> wrote:
>
>> Eli Grubman wrote:
>>> On Mon, 24 Nov 2008 11:57:16 +0000, Naked Gonad
>>> <bodron57@tiscali.co.uk> wrote:
>>>
>>>> Eli Grubman wrote:
>>>>> On Mon, 24 Nov 2008 11:25:23 +0000, Naked Gonad
>>>>> <bodron57@tiscali.co.uk> wrote:
>>>>>
>>>>>> Eli Grubman wrote:
>>>>>>> On Mon, 24 Nov 2008 09:17:07 +0000, Naked Gonad
>>>>>>> <bodron57@tiscali.co.uk> wrote:
>>>>>>>
>>>>>>>> Eli Grubman wrote:
>>>>>>>>> On Tue, 18 Nov 2008 09:27:20 +0000, Naked Gonad
>>>>>>>>> <bodron57@tiscali.co.uk> wrote:
>>>>>>>>>
>>>>>>>>>> Pants Rheitard is a filthy Grik wog with no penis who stalks 18 hrs/day!
>>>>>>>>>> LOL wrote:
>>>>>>>>>>> On Sat, 15 Nov 2008 16:43:18 +0000, Naked Gonad
>>>>>>>>>>> <bodron57@tiscali.co.uk> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Eli Grubman wrote:
>>>>>>>>>>>>> On Sat, 15 Nov 2008 08:21:39 +0000, Naked Gonad
>>>>>>>>>>>>> <bodron57@tiscali.co.uk> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Eli Grubman wrote:
>>>>>>>>>>>>>>> On Fri, 14 Nov 2008 18:33:50 -0000, "Peter Hucker" <none@spam.com>
>>>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Thu, 13 Nov 2008 04:15:28 -0000, Eli Grubman <eli.grubman@googlemail.com> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> On Wed, 12 Nov 2008 18:53:55 -0000, "Peter Hucker" <none@spam.com>
>>>>>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> On Tue, 11 Nov 2008 19:33:48 -0000, Naked Gonad <bodron57@tiscali.co.uk> wrote:
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Peter Hucker wrote:
>>>>>>>>>>>>>>>>>>>> On Tue, 11 Nov 2008 03:40:32 -0000, Eli Grubman <eli.grubman@googlemail.com> wrote:
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> On Mon, 10 Nov 2008 19:18:38 -0000, "Peter Hucker" <none@spam.com>
>>>>>>>>>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> On Sun, 09 Nov 2008 03:43:15 -0000, Eli Grubman <eli.grubman@googlemail.com> wrote:
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> On Sat, 08 Nov 2008 18:28:35 -0000, "Peter Hucker" <none@spam.com>
>>>>>>>>>>>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> No, you bypassed it.
>>>>>>>>>>>>>>>>>>>>>> I did not say:
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> -3, -2, -1, er..., 1, 2, 3
>>>>>>>>>>>>>>>>>>>>> Would it have made a difference if it wasn't there?
>>>>>>>>>>>>>>>>>>>> Yes, see my reply to Gonad.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Nought is accepted as meaning nothing generally.
>>>>>>>>>>>>>>>>>>> In a bank account 0 or 0 recurring=nothing, try convincing
>>>>>>>>>>>>>>>>>>> the bank that the 0 counts as anything more than nothing.
>>>>>>>>>>>>>>>>>> It is not the same as nothing. An empty bank account is not the same as no bank account.
>>>>>>>>>>>>>>>>> One is as useless as the other.
>>>>>>>>>>>>>>>> Not if you have an overdraft agreement.
>>>>>>>>>>>>>>> That's even worse.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> We're into negative territory now.
>>>>>>>>>>>>> Credit crunched!
>>>>>>>>>>>>>
>>>>>>>>>>>> I thought I'd heard a noise.
>>>>>>>>>>> Who farted?
>>>>>>>>>>>
>>>>>>>>>> Peter, I think.
>>>>>>>>> A jockfart?
>>>>>>>>>
>>>>>>>> <sniff> Yes, it's definitely haggis.
>>>>>>> Sheeps' stomachs are where farts incubate!
>>>>>>>
>>>>>> Eeeeewe!!
>>>>> Very lameb.
>>>>>
>>>> He who farts first, farts longest.
>>> If not loudest.
>>>
>> He who farts last, follows through.
>
> He who follows through, soils troosers!
>
Stand clear!!