Hi All,
I am trying to do encryption/decryption with RSA.
For encryption, I use the public key. For decryption, I use the private
key. The idea is to take a 80 byte array and encrypt it and then
decrypt that result to get the original 80 byte array. However, when I
do the decryption I am getting a "Error occurred while decoding OAEP
padding." CryptoGraphicEx ception.
byte[] RSAResult = RSA.Encrypt(dat aToDecrypt,true );
encryptedData = rsaCSP.Decrypt( dataToEncrypt, true);
I have tried using false for the OAEP parameter (all combinations) but
that only gets bad key or bad data exceptions. I looked on google and I
didn't find too much on this topic except an article suggesting having
the same size buffer which I did keep the same size.
The wierd thing is that I am doing the exact same piece of code at the
beginning of my program and it works. This code is called again in the
middle of my app and it fails. Too wierd.
Any ideas or suggestions?
Thanks guys.
Sushant Bhatia
3  5917 
Sushant,
You should not cross-post your questions. And you should never cross-post
your question in so many groups!
From the description you gave, I'm quite confident that its just a bug in
your own code. However I'll refrain from further conversation on that
subject as long as it will be cross-posted.
-Valery. http://www.harper.no/valery
"Sushant Bhatia" <su************ @gmail.com> wrote in message
news:11******** *************@g 14g2000cwa.goog legroups.com... Hi All,
I am trying to do encryption/decryption with RSA.
For encryption, I use the public key. For decryption, I use the private
key. The idea is to take a 80 byte array and encrypt it and then
decrypt that result to get the original 80 byte array. However, when I
do the decryption I am getting a "Error occurred while decoding OAEP
padding." CryptoGraphicEx ception.
byte[] RSAResult = RSA.Encrypt(dat aToDecrypt,true );
encryptedData = rsaCSP.Decrypt( dataToEncrypt, true);
I have tried using false for the OAEP parameter (all combinations) but
that only gets bad key or bad data exceptions. I looked on google and I
didn't find too much on this topic except an article suggesting having
the same size buffer which I did keep the same size.
The wierd thing is that I am doing the exact same piece of code at the
beginning of my program and it works. This code is called again in the
middle of my app and it fails. Too wierd.
Any ideas or suggestions?
Thanks guys.
Sushant Bhatia
Hehe. Sorry. Its my first massive cross post. How do I undo?
Damn. I see why you said cross posting is bad. All posts to this one
thread are going to all the threads and its becoming big. Sorry google
groups. I'm trying to do an individual reply to this post only so that
the rest of them just die out.
Ps. Still looking for any suggestions to my wierd problem with OAEP
padding. Thanks.
This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: wqhdebian |
last post by:
As far as I know,when encrypt or decrypt ,a key must first be got,and
the key is first generate by a tool or from SecurityRandom,that means
I can not generate the same key with the same input.Does there is a
method which can generate a same with the same input string?
There is a need to transfer file between to site,and the customer
wish to encrypt these files during transfering,and they want to store
a string into each database at...
|
by: Spikinsson |
last post by:
I'm looking for a good decrypt/encrypt function, all I want is a function in this form:
char* encrypt(char* normal)
{
...
return encrypted;
}
and
|
by: Benoît |
last post by:
Hi,
I have generated two keys :
"C:>openssl req -nodes -new -x509 -keyout ben.key -out ben.crt -days
3650"
I try to encrypt/decrypt a string like "JOHN" with these asymetrics
keys. With the following code, it works.
I encrypt with the public key which is in the certificate.
I decrypt with the private key.
But why, the crypted message is different every time I start the
programm...?
|
by: Matthias S. |
last post by:
Hi,
I had a look at the vast information on encryption in the MSDN and got
pretty confused. All I want to do is to encrypt a string into an encrypted
string and later decrypt that (encrypted) string again to a human readable
form. Can't be that difficult :).
Could you send me please into the right direction. Thanks in advance.
--
|
by: Gidi |
last post by:
Hi,
Is there Buid-In fuction in C# that Encrypt and Decrypt strings?
i have a textbox which i'm writing into file, and i want to encrypt it
before writing, i'm not looking for something fancy, just for a simple
Encryption and Decryption function.
thanks,
Gidi.
| | |
by: toupeira23 |
last post by:
Hello,
I'm trying to encrypt passwords in my app. After discovering that
there's no simple function to do this, I wrote a wrapper class which
decodes a string using UTF8, encrypts it with TripleDES and returns a
Base64-encoded string. The decryption function does the reverse, i.e.
Base64-decodes the string, decrypts it with the same Key and IV, and
encodes it again with UTF8. The problem is that after decrypting, the
8th character is...
|
by: Islamegy® |
last post by:
I give up.. I tried everything to encrypt querystring and decrypt it back
but this never success.. i use RSA encryption. I always get excption when
Convert fromBase64String so i tried HttpUtitlity.UrlEncode() but i got bad
data Exception..
Is there anyway to work around this??
|
by: Ismail Fatih Yıldırım |
last post by:
I modified the RSACSPSample from MSDN to try out a simple commutative
encryption model using RSA encryption but when i run the progrem the first
encryption command works but during the second encryption command (line :
encryptedData2 = RSAE...) i get a "Key not valid for use in specified
state." exception error even though i provide a valid second key to encrypt
it. How can i overcome this error and get double encryption to work ?
The...
|
by: JDeats |
last post by:
I have some .NET 1.1 code that utilizes this technique for encrypting
and decrypting a file.
http://support.microsoft.com/kb/307010
In .NET 2.0 this approach is not fully supported (a .NET 2.0 build
with these methods, will appear to encrypt and decrypt, but the
resulting decrypted file will be corrupted. I tried encrypting a .bmp
file and then decrypting, the resulting decrypted file under .NET 2.0
is garbage, the .NET 1.1 build works...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
| | |
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| | |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |
