缺少符号 Rijndael::Enc::ProcessAndXorBlock 和 Rijndael::Dec::ProcessAndXorBlock

Question

我正在尝试为 AES 编译代码，但是当我尝试执行此操作时出现错误。代码如下：

#include <iostream>
#include <iomanip>

#include "modes.h"
#include "aes.h"
#include "filters.h"

int main(int argc, char* argv[]) {

//Key and IV setup
//AES encryption uses a secret key of a variable length (128-bit, 196-bit or 256-   
//bit). This key is secretly exchanged between two parties before communication   
//begins. DEFAULT_KEYLENGTH= 16 bytes
byte key[ CryptoPP::AES::DEFAULT_KEYLENGTH ], iv[ CryptoPP::AES::BLOCKSIZE ];
memset( key, 0x00, CryptoPP::AES::DEFAULT_KEYLENGTH );
memset( iv, 0x00, CryptoPP::AES::BLOCKSIZE );

//
// String and Sink setup
//
std::string plaintext = "Now is the time for all good men to come to the aide...";
std::string ciphertext;
std::string decryptedtext;

//
// Dump Plain Text
//
std::cout << "Plain Text (" << plaintext.size() << " bytes)" << std::endl;
std::cout << plaintext;
std::cout << std::endl << std::endl;

//
// Create Cipher Text
//
CryptoPP::AES::Encryption aesEncryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Encryption cbcEncryption( aesEncryption, iv );

CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink( ciphertext ) );
stfEncryptor.Put( reinterpret_cast<const unsigned char*>( plaintext.c_str() ), plaintext.length() + 1 );
stfEncryptor.MessageEnd();

//
// Dump Cipher Text
//
std::cout << "Cipher Text (" << ciphertext.size() << " bytes)" << std::endl;

for( int i = 0; i < ciphertext.size(); i++ ) {

    std::cout << "0x" << std::hex << (0xFF & static_cast<byte>(ciphertext[i])) << " ";
}

std::cout << std::endl << std::endl;

//
// Decrypt
//
CryptoPP::AES::Decryption aesDecryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv );

CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedtext ) );
stfDecryptor.Put( reinterpret_cast<const unsigned char*>( ciphertext.c_str() ), ciphertext.size() );
stfDecryptor.MessageEnd();

//
// Dump Decrypted Text
//
std::cout << "Decrypted Text: " << std::endl;
std::cout << decryptedtext;
std::cout << std::endl << std::endl;

return 0;
}

我得到的错误如下所示，这只是一个小样本，还有很多，但看起来都与此类似：

  "non-virtual thunk to CryptoPP::Rijndael::Enc::ProcessAndXorBlock(unsigned char const*, unsigned char const*, unsigned char*) const", referenced from:
      vtable for CryptoPP::BlockCipherFinal<(CryptoPP::CipherDir)0, CryptoPP::Rijndael::Enc> in project-53b621.o
      vtable for CryptoPP::ClonableImpl<CryptoPP::BlockCipherFinal<(CryptoPP::CipherDir)0, CryptoPP::Rijndael::Enc>, CryptoPP::Rijndael::Enc> in project-53b621.o
  "non-virtual thunk to CryptoPP::Rijndael::Enc::AdvancedProcessBlocks(unsigned char const*, unsigned char const*, unsigned char*, unsigned long, unsigned int) const", referenced from:
      vtable for CryptoPP::BlockCipherFinal<(CryptoPP::CipherDir)0, CryptoPP::Rijndael::Enc> in project-53b621.o
      vtable for CryptoPP::ClonableImpl<CryptoPP::BlockCipherFinal<(CryptoPP::CipherDir)0, CryptoPP::Rijndael::Enc>, CryptoPP::Rijndael::Enc> in project-53b621.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我不太确定问题出在哪里，我到处寻找试图解决这个问题，但我没有找到任何可行的方法。任何建议将不胜感激。

Answer 1

您是否尝试过制作标题#include "cryptopp/modes.h" 等？我不确定您是如何在计算机上安装 Crypto++ 的，但这可能是问题所在，因为它是链接器问题。确保使用 -lcryptopp 进行编译。查看您如何将目标文件链接在一起。说明您安装cryptopp的方式和位置。发布更多相关信息