Encrypted Strings

[David Kyle]

Hello,

I'm building a web application where I need to have some post data
encrypted. An example would be something like this:
<input type=hidden value='<%# GetEncriptedData() %>'>

GetEncryptedData() returns a string value that I can post.

I will be using a symmetric algorithm; most likely the Rijndael algorithm.
I don't have any problem encrypting my data but the issue lies in the fact
that I am left with the encrypted data in a byte array (byte[]). I believe
I need to somehow convert this to a string format and then run it through
the Server.URLEncode() method so that the string is then postable.

I will also need to convert it back to bytes. Obviously using
Server.URLDecode() and then some other method.

Any help would be greatly appreciated!

David Kyle
www.chloemag.com

 

[Bill]

You will need to use the ToBase64String() method. This is because the
encrypted data will contain binary data which can not be put in to a string
object.

BYTEARRAY = EncryptData()
STRING = System.Convert.ToBase64String(BYTEARRAY)

<input type=hidden name=data value='<%# Server.UrlEncode(STRING ) %>'>

Then before decoding use

STRING = Server.URLDecode(Request("data"))
BYTEARRAY = System.Convert.FromBase64String(STRING )
DecryptData(BYTEARRAY)

Bill

 

[David Kyle]

My God! Your a god sent Bill! Thanks so much for the help. It works
wonderfully!

Cheers!

David Kyle
www.chloemag.com

You will need to use the ToBase64String() method. This is because the
encrypted data will contain binary data which can not be put in to a
string object.

BYTEARRAY = EncryptData()
STRING = System.Convert.ToBase64String(BYTEARRAY)

<input type=hidden name=data value='<%# Server.UrlEncode(STRING ) %>'>

Then before decoding use

STRING = Server.URLDecode(Request("data"))
BYTEARRAY = System.Convert.FromBase64String(STRING )
DecryptData(BYTEARRAY)

Bill

Hello,

I'm building a web application where I need to have some post data
encrypted. An example would be something like this:
<input type=hidden value='<%# GetEncriptedData() %>'>

GetEncryptedData() returns a string value that I can post.

I will be using a symmetric algorithm; most likely the Rijndael
algorithm. I don't have any problem encrypting my data but the issue lies
in the fact that I am left with the encrypted data in a byte array
(byte[]). I believe I need to somehow convert this to a string format
and then run it through the Server.URLEncode() method so that the string
is then postable.

I will also need to convert it back to bytes. Obviously using
Server.URLDecode() and then some other method.

Any help would be greatly appreciated!

David Kyle
www.chloemag.com