System.Security.Cryptography

  • Thread starter Thread starter tascien
  • Start date Start date
T

tascien

What i want to do is really simple...

Encrypt all my querystrings, in the website. Do want to show something
like this:

UserID=833774

want to show:

uid=09SDSOIFDOIFIIDOIFOIDFOIOIFD

some kind of encrypted string that requires a password to decrypt it.

the examples shown here:

http://msdn.microsoft.com/library/d...pcongeneratingkeysforencryptiondecryption.asp

are cumbersome...

1. The Encrypt returns bytes instead of the string... (Why not return a
string...)
2. Decrypt is doing some TCP/IP connections.... (what's that for???)

Anybody can point me to a better example?

Tascien
 
Thanks for the example, but when i try to write out the ciphered bytes
in text, I get strange results...

System.text.encoding.utf8.GetString(ciphered) print out something like
this:

Z2QC.%▲WA⌂t¶upPJ<: Fz↓??w♀Um♣3
?H$2+TPC'☻9♂(&◄l&E?Dc;,5▬rNQp$h?♫wXC?vNGY

I need something i can use ain a query string...
 
tascien said:
Thanks for the example, but when i try to write out the ciphered bytes
in text, I get strange results...

System.text.encoding.utf8.GetString(ciphered) print out something like
this:

Z2QC.%?WA?t?upPJ<: Fz???w?Um?3
?H$2+TPC'?9?(&?l&E?Dc;,5?rNQp$h??wXC?vNGY
Click to expand...

Yes - and you should expect that, because you were putting arbitrary
data into it. (There's no guarantee that it's even a valid UTF-8-
encoded string at all.)
I need something i can use ain a query string...
Click to expand...

Use Convert.ToBase64String. You might want to replace / with * and +
with - to make it more URL-encoding-friendly.
 
Or use HttpContext.Server.HtmlEncode once you have the Base64 string...so:

1. Encrypt to bytes
2. Convert to Base64 string
3. Encode Base64 string for use in querystring

HTH,
Kent
 
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