can I encrypt ascii extended codes using Rijndael 1

[tango1948]

Hi I have a couple of questions, firstly am I correct in assuming that the Rijndael encrytion method cannot handle ASCII extended codes (> 127).
Secondly if this is so I want to convert ASCII code characters 128 - 154 (Hebrew Dos) to 97 - 123 (Lower case + 1). The string.Replace function doesn't seem to work, I assume because it's looking for unicode characters. So what function can I use to replace these ASCII characters in the string or alternativly which encryption methods will handle ASCII extended codes.
Thanks for any help

David

 

[chiph]

Rjindael will have no problems encrypting any byte value you give it -- [0..255] will all work in both directions.

However, the ASCII encoding is only defined for the range of [0..127], and so any characters that are above that range will not be retrieved correctly.

The clue is that you're referring to Hebrew and ASCII in the same context, and they are not the same thing. Investigate the System.Text.Encoding.GetEncoding() method, and use the encoder it returns you prior to encrypting your string.

Chip H.


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