DESCryptoServiceProvider

[Ondrej Sevecek]

Hello,

would you please provide me with some simple sample of how to use the
DESCryptoServiceProvider to encrypt a buffer

byte[] buffer;

with key

byte[] key;

produceing cipher text:

byte[] ciphertext;

I saw some sample using Streams, but is there a simpler method working for
buffers?

O.

[Jon Skeet [C# MVP]]

<"Ondrej Sevecek" <ondra_at_sevecek_dt_com>> wrote:

Hello,

would you please provide me with some simple sample of how to use the
DESCryptoServiceProvider to encrypt a buffer

byte[] buffer;

with key

byte[] key;

produceing cipher text:

byte[] ciphertext;

I saw some sample using Streams, but is there a simpler method working for
buffers?

You need to use a stream at some stage, but using MemoryStream and its
ToArray method make it easy to return a byte array.

Basically, just create a MemoryStream, then an appropriate CryptoStream
to write into that. Write your original buffer into the CryptoStream,
close it (which will do the appropriate FlushFinalBlock - just
disposing of it won't, due to a bug in 1.1), and then call ToArray on
the MemoryStream.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
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