Just load file data into memory buffer (std::vector<CryptoPP::byte>) and
use filter pipeline with VectorSource and VectorSink.
https://cryptopp.com/docs/ref/class_vector_source.html
https://cryptopp.com/docs/ref/class_vector_sink.html
четверг, 22 сентября 2022 г. в 00:59:54 UTC+7, kakaa...@gmail.com:
> I'm encrypting a file this way:
>
>
> #include <cryptopp/files.h>
> #include <cryptopp/modes.h>
> #include <cryptopp/osrng.h>
> #include <cryptopp/base64.h>
> #include <cryptopp/hex.h>
> #include <Windows.h>
> #include <iostream>
> #include <fstream>
>
>
> void FileEncrypt(byte key[], byte iv[]
> , const std::string& file, const std::string& dest)
> {
> CTR_Mode< AES >::Encryption cipher;
> cipher.SetKeyWithIV(key, strlen((char*)key), iv,
> strlen((char*)iv));
>
> std::ifstream in{file, std::ios::binary};
> std::ofstream out{dest, std::ios::binary};
>
> CryptoPP::FileSource{in, true,
> new CryptoPP::StreamTransformationFilter{
> cipher, new CryptoPP::FileSink{out}}};
> }
>
> INT main(INT argc, PCHAR* argv)
> {
> std::string file = "...";
> std::string dest = "...";
>
> unsigned char* key[] = "p3s6v9y$B&E)H@Mc";
> unsigned char* iv[] = "VkXp2s5v8y/B?E(H";
>
> FileEncrypt(key, iv, file, dest);
> FileDecrypt(key, iv, file, dest);
> }
>
>
> Then when needed i'm downloading the encrypted file from my repo.
>
> I've been able to decrypt it with:
>
> ```c++
> void FileDecrypt(byte key[], byte iv[]
> , const std::string& file, const std::string& dest)
> {
> CTR_Mode< AES >::Decryption cipher;
> cipher.SetKeyWithIV(key, strlen((char*)key), iv,
> strlen((char*)iv));
>
> std::ifstream in{file, std::ios::binary};
> std::ofstream out{dest, std::ios::binary};
>
> CryptoPP::FileSource{in, true,
> new CryptoPP::StreamTransformationFilter{
> cipher, new CryptoPP::FileSink{out}}};
> }
> ```
> But this way the decrypted file is saved to disk, how could i decrypt it
> on memory without saving to disk?
>
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