Hi, I have problem.
I want/need encrypt file and put the encrypted data into the same one (not
create new file).
For example...
I have unencrypted file (myfile.txt) and I want encrypt it, but don't
create new file (let's say myfile.encrypted), but I want the encrypted data
put into the same file (myfile.txt). If I use this: *CryptoPP::FileSource
encryptFile("myfile.txt", true, new
CryptoPP::StreamTransformationFilter(cbcEncryptor, new
CryptoPP::FileSink("myfile.txt")));*, the FileSink will open the output
file (myfile.txt) in trunc mode (delete all previous data), but that is the
problem. The FileSource read files by 4096bytes chunk, so I need load chunk
-> encrypt -> replace unencrypted chunk with encrypted one -> repeat.
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