Linux中的libcrypto++

Question

对于代码：

#include <fstream>

#include <iostream> //cryptopp libraries

#include "cryptopp/dll.h"

#include "cryptopp/default.h"


using namespace std;

using namespace CryptoPP;

int main()
{

 byte key[AES::DEFAULT_KEYLENGTH], iv[AES::BLOCKSIZE];

    // initialize key and iv here

    CFB_Mode<AES >::Encryption cfbEncryption(key, AES::DEFAULT_KEYLENGTH, iv);

 std::cout << "Hello world!" << std::endl;

 return 0;

}

编译时出现以下错误：$：g++ test.cpp -o tess -lcrypto++ -lpthread

/tmp/ccLR085h.o: In函数CryptoPP::AllocatorWithCleanup<unsigned char, true>::allocate(unsigned int, void const*)': test.cpp:(.text._ZN8CryptoPP20AllocatorWithCleanupIhLb1EE8allocateEjPKv[CryptoPP::AllocatorWithCleanup<unsigned char, true>::allocate(unsigned int, void const*)]+0x2b): undefined reference toCryptoPP::AlignedAllocate(unsigned int)‘test.cpp:(.text._ZN8CryptoPP20AllocatorWithCleanupIhLb1EE8allocateEjPKvCryptoPP::AllocatorWithCleanup::allocate(unsigned int，void const*)+0x38)：未定义的对CryptoPP::UnalignedAllocate(unsigned int)' /tmp/ccLR085h.o: In functionCryptoPP::AllocatorWithCleanup::deallocate(void*，unsigned int)'：test.cpp:(.text._ZN8CryptoPP20AllocatorWithCleanupIhLb1EE10deallocateEPvjCryptoPP::AllocatorWithCleanup::deallocate(void*，unsigned int)+0x25)：对CryptoPP::AlignedDeallocate(void*)' test.cpp:(.text._ZN8CryptoPP20AllocatorWithCleanupIhLb1EE10deallocateEPvj[CryptoPP::AllocatorWithCleanup<unsigned char, true>::deallocate(void*, unsigned int)]+0x32): undefined reference toCryptoPP::UnalignedDeallocate(void*)’collect2的未定义引用: ld返回1个退出状态

需要帮助。THX

Answer 1

这一点很棘手。我怀疑您发布的编译行不是产生错误的编译行。当我这样做的时候

g++ test.cpp -o tess -lcryptopp -lpthread -L.

我没有收到任何错误，但当我收到错误时

g++ -o tess -lcryptopp -lpthread -L. test.cpp

我从一开始就收到了很多错误

/tmp/ccCSTBSy.o: In function `CryptoPP::SimpleKeyingInterface::SimpleKeyingInterface()':
SO4602996.cpp:(.text._ZN8CryptoPP21SimpleKeyingInterfaceC2Ev[CryptoPP::SimpleKeyingInterface::SimpleKeyingInterface()]+0x4): undefined reference to `vtable for CryptoPP::SimpleKeyingInterface'
/tmp/ccCSTBSy.o: In function `CryptoPP::SecBlock<unsigned char, CryptoPP::AllocatorWithCleanup<unsigned char, false> >::SecBlock(unsigned int)':
SO4602996.cpp:(.text._ZN8CryptoPP8SecBlockIhNS_20AllocatorWithCleanupIhLb0EEEEC1Ej[CryptoPP::SecBlock<unsigned char, CryptoPP::AllocatorWithCleanup<unsigned char, false> >::SecBlock(unsigned int)]+0x25): undefined reference to `CryptoPP::AllocatorWithCleanup<unsigned char, false>::allocate(unsigned int, void const*)'

这看起来像是你得到的错误。

请注意，我从源代码编译了cryptopp 5.6.1，并在本例中使用的目录中放置了库的副本:因此，我需要-L.将当前目录包括在库路径搜索中。我也在使用-lcryptopp而不是-lcrypto++，因为它是我的源码生成的。