I'm having problem with unwarpping/decoding/deciphering a file.
Here's how the file is encrypted:
CBC_Mode<AES>::Encryption encrAES;
byte aesKey[32], aesIV[16];
rng.GenerateBlock(aesKey, 32); rng.GenerateBlock(aesIV, 16);
encrAES.SetKeyWithIV(aesKey, 32, aesIV);
Base64Encoder *baseEnc = new Base64Encoder(new FileSink("encoded.txt"));
StreamTransformationFilter aesEnc(encrAES, baseEnc);
aesEnc.Put(plainText, sizeof(plainText));
aesEnc.MessageEnd();
............repeat the last two multiple times...........
Then I feed the data to aesEnc and it works fine.
Now I'm trying to reverse this process, and unwrap the contents of that file
record by record. So ideally I need something like
FileSource(file)->Base64Decoder->Decryptor, from which I can Get() my data
back.
However I fail miserably in attempts to do something like:
Base64Decoder *b6d = new
Base64Decoder(new FileSource("encoded.txt", true));
StreamTransformationFilter aesDec(b6d, decrAES);
I'm sure you understand what it is that I'm trying to accomplish. It is
clear that I haven't gotten the hang of filters and piping in Crypto++, so
I'm not connecting/using the right pieces. What is the best way to do what
I'm trying to achieve?
In the above code, decrAES is decryptor that reverses encrAES (of course
:-).
Thank you!
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