I'm working on an AES encryptor program and have everything working great
with stream filters performing the key file, plaintext and cipher text.
I've implemented several of the AES block modes but can't find a way to
output the IV and the Ciphertext using a filesource, streamfilter and a
filesink.
Does anyone know an easy way to generate the ciphertext file such that the
output is the [IV][ENCRYPTED DATA]? I'm writing separate encrypt and
decrypt programs so the IV and the cipher text needs to saved to file and
read from file.
Here is the existing code segment:
// Create IV variable
byte iv[AES::BLOCKSIZE];
FileSource pt(plaintext_file.c_str(), true,
new StreamTransformationFilter(e,
new HexEncoder(
new FileSink(ciphertext_file.c_str(), false /* non-binary */)
) // HexEncoder
) //
StreamTransformation
, binaryfile_bool); // FileSource
I's love to see something like this available:
FileSource pt(*(iv + plaintext_file.c_str())*, true,
new StreamTransformationFilter(e,
new HexEncoder
(
new FileSink(ciphertext_file.c_str(), false /* non-binary */)
) // HexEncoder
) //
StreamTransformation
, binaryfile_bool); // FileSource
Redirectors also seem to have promise when I found a concatenate files
example but I'd also need a way to separate out the IV in the decrypt
program which the redirector didn't seem to have a way of doing. I love
the cleaness of the streamfilters but think I need to ditch them to build
the output into a string. I'm not familiar with using non-stream filters
and was concerned that reading large files into a string might cause an
issue, but perhaps not.
Thanks
Jeff
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