>I hope I can articulate this so that you can understand the problem. I built to classes: Encrypt and Decrypt according to MSDN article. When I run the program to encrypt and decrypt strings with the test program, everything works fine. The process is:
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>plaintext = "this is to be encrypted"
>ciphertext = encrypt(plaintext)
>returntext = decrypt(ciphertext)
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>in this example plaintext and returntext are identical.
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>I am trying to store the results of the encrypt to a registry string. ciphertext is a byte[] on the return so I am converting it to string for storage in the registry by using:
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>mystring = Convert.ToBase64String(cipherText)
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>in this example, ciphertext has a length of 48. I store mystring to the registry and retrieve it. This works fine. When I convert the plaintext from the registry back into a byte[] using:
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>cipherText = Encoding.ASCII.GetBytes(mystring);
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>the length is now 64 for ciphertext and the decrypt function fails returning an error message about PCKS7 padding is invalid.
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>How can I store the ciphertext to the registry and reconvert it back to byte[] without physically changing the data? Hope this makes sense. Thanks.