数组参数衰减

Question

我试图将2字节数组传递给我写的文件加密函数。但是，当我这样做时，两个数组都被截断为大小为8（从大小16开始），从而导致函数无法正常工作。因为函数参数只是指向字节数组，所以我不确定我在这里做错了什么。

   CryptoPP::AutoSeededRandomPool prng;
   //Key generation
   byte key[AES::DEFAULT_KEYLENGTH];
   prng.GenerateBlock(key, sizeof(key));
   //IV generation
   byte iv[AES::BLOCKSIZE];
   prng.GenerateBlock(iv, sizeof(iv));



   //print key
   encoded.clear();
   StringSource(key, sizeof(key), true, new HexEncoder(new StringSink(encoded)));
   cout << "key: " << encoded << endl;
   cout << "Size of key: " << sizeof(key) << endl;

   //print iv
   encoded.clear();
   StringSource(iv, sizeof(iv), true, new HexEncoder(new StringSink(encoded)));
   cout << "iv: " << encoded << endl;
   cout << "Size of iv: " << sizeof(iv) << endl;

   //See function below
   encrypt_file(inFile, outFile, key, iv, err); 

   inFile.close();
   outFile.close();

在此函数中，字节数组由于某种原因被截断

Encrypt_file

    bool encrypt_file(std::ifstream& inFile,
       std::ofstream& outFile,
       const byte* key, const byte* iv,
       std::string& errMsg)
    {
       std::string encoded;
       //print key
       encoded.clear();
       StringSource(key, sizeof(key), true, new HexEncoder(new StringSink(encoded)));
       cout << "key: " << encoded << endl;
       cout << "Size of key: " << sizeof(key) << endl;

       //print iv
       encoded.clear();
       StringSource(iv, sizeof(iv), true, new HexEncoder(new StringSink(encoded)));
       cout << "iv: " << encoded << endl;
       cout << "Size of iv: " << sizeof(iv) << endl;
       try {
          CryptoPP::CBC_Mode<CryptoPP::AES>::Encryption e;
          e.SetKeyWithIV(key, sizeof(key), iv);
          CryptoPP::FileSource(inFile, true, new CryptoPP::StreamTransformationFilter(e, new CryptoPP::FileSink(outFile)));
          inFile.close();
          outFile.close();
       }
       catch (CryptoPP::Exception& e) {
          errMsg = e.GetWhat();
          return false;
       }
       return true;
    }

输出：

key: 6574D7BDFD0DD3BC59CD3846D4A196A8
Size of key: 16
iv: 1B4ED692F91A32246B41F63F6B8C6EAA
Size of iv: 16
key: 6574D7BDFD0DD3BC
Size of key: 8
iv: 1B4ED692F91A3224
Size of iv: 8