c++ - 无法将 C++ 项目与 openssl 静态库链接

Question

我在 C++ 上完成了一些项目，我需要为 Windows XP 和更高版本编译它。

这是我的 RsaEncryptor 类的头文件(我认为在这里发布源代码无关紧要，因为我 100% 确定它工作正常，但如果需要的话我可以做到):

#ifndef RSAENCRYPTOR_H_
#define RSAENCRYPTOR_H_

#include <stdexcept>
#include <openssl/rsa.h>
#include <openssl/engine.h>
#include <openssl/pem.h>

// One of this paddings can be used
//#define PADDING RSA_PKCS1_OAEP_PADDING
#define PADDING RSA_PKCS1_PADDING
//#define PADDING RSA_NO_PADDING

class RsaEncryptor {

private:

    RSA* publicKey;
    RSA* privateKey;

public:

    RsaEncryptor() {
        publicKey = nullptr;
        privateKey = nullptr;
    }

    ~RsaEncryptor() {
        if ( this->publicKey )
            RSA_free( this->publicKey );
        if ( this->privateKey )
            RSA_free( this->privateKey );
    }

    size_t GetCipherBytesCount() {
        return 172; //is default for 1024 bit key length
    }

    void SetPublicKeyFromString(const std::string& content);
    void SetPrivateKeyFromString(const std::string& content);

    std::string Encrypt(const std::string& plainData);
    std::string Decrypt(const std::string& cipherData);

};


#endif /* RSAENCRYPTOR_H_ */

我使用最新版本的 Eclipse Neon 在 Windows 10 x64 机器上进行 C++ 开发。

我也读过this :

(...) you will need to configure with no-async when building OpenSSL 1.1.0 and above for Windows XP or Vista

然后我得到了 following 的指导说明。

我做了什么:

1. 在 Windows 10 x64 下的 Virtual Box 中安装 Ubuntu 17.04 x64。

2. 从 Ubuntu

   下载最新版本的 OpenSSL 库

3. 安装 mxe和所有要求(但无法用它编译，我决定使用 mingw32)

4. 通过 root@user-pc:/home/user# apt-get install gcc-mingw-w64-i686 安装 mingw32

   /li>

5. 在 /home/user/openssl-x32 中解压 OpenSSL 库

6. 转到/home/user/openssl-x32

7. 运行 ./Configure mingw --cross-compile-prefix=i686-w64-mingw32 --prefix=/home/user/builds/openssl-x32-static no-shared no-async

8. 运行make

9. 运行安装

10. 从 /home/user/builds/openssl-x32-static/lib 复制 libssl.a 和 libcrypto.a到主机 (Windows 10 x64) 到文件夹 E:\MyProjects\my-app\libraries\

11. 将 include 目录从 Ubuntu 复制到主机文件夹 E:\MyProjects\my-app\include

12. 将 libraries 文件夹添加到链接器配置

13. 将include文件夹添加到编译器配置

14. 然后，我构建了我的项目并得到了以下答案:

11:58:09 **** Rebuild of configuration Debug for project app **** Info: Configuration "Debug" uses tool-chain "MinGW GCC" that is unsupported on this system, attempting to build anyway. Info: Internal Builder is used for build g++ "-IC:\MyProjects\my-app\include" -O0 -g3 -Wall -c -std=c++11 -m32 -o RsaEncryptor.o "..\RsaEncryptor.cpp" g++ "-IC:\MyProjects\my-app\include" -O0 -g3 -Wall -c -std=c++11 -m32 -o main.o "..\main.cpp" In file included from ..\main.cpp:5:0: ..\FilesFinder.h: In member function 'void FilesFinder::FindRecursively(const string&, const FilesFilter&)': ..\FilesFinder.h:90:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (destinationContainer.GetElementsCount() >= MAX_ELEMENTS_COUNT) { ^ g++ "-IC:\MyProjects\my-app\include" -O0 -g3 -Wall -c -std=c++11 -m32 -o aes256.o "..\aes256.cpp" g++ "-LC:\MyProjects\my-app\libraries" -static-libgcc -static-libstdc++ -static -lpthread -m32 -o C:/MyProjects/my-app/bin/Debug/app RsaEncryptor.o aes256.o main.o -lssl -lcrypto -lgdi32 C:\MyProjects\my-app\libraries\libcrypto.a(b_addr.o):b_addr.c:(.text+0xaa): undefined reference to _imp__getnameinfo@28'
C:\MyProjects\my-app\libraries\libcrypto.a(b_addr.o):b_addr.c:(.text+0xe0):
undefined reference to_imp__ntohs@4' C:\MyProjects\my-app\libraries\libcrypto.a(b_addr.o):b_addr.c:(.text+0x242): undefined reference to gai_strerrorW'
C:\MyProjects\my-app\libraries\libcrypto.a(b_addr.o):b_addr.c:(.text+0x820):
undefined reference to_imp__freeaddrinfo@4' C:\MyProjects\my-app\libraries\libcrypto.a(b_addr.o):b_addr.c:(.text+0xb5d): undefined reference to _imp__getaddrinfo@16'
C:\MyProjects\my-app\libraries\libcrypto.a(b_addr.o):b_addr.c:(.text+0xba2):
undefined reference togai_strerrorW' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0xd7): undefined reference to _imp__WSAStartup@8'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0xe8):
undefined reference to_imp__WSAGetLastError@0' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x2c7): undefined reference to _imp__WSAStartup@8'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x2d8):
undefined reference to_imp__WSAGetLastError@0' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x3b1): undefined reference to _imp__ntohs@4'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x40c):
undefined reference to_imp__getsockopt@20' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x423): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x43c):
undefined reference to_imp__gethostbyname@4' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x48b): undefined reference to _imp__WSAStartup@8'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x4a2):
undefined reference to_imp__WSAGetLastError@0' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x52c): undefined reference to _imp__WSACleanup@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x54d):
undefined reference to_imp__ioctlsocket@12' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x563): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x6b7):
undefined reference to_imp__WSAStartup@8' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x6c8): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x942):
undefined reference to_imp__WSAGetLastError@0' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0x9dc): undefined reference to _imp__setsockopt@20'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0xa15):
undefined reference to_imp__ioctlsocket@12' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0xa32): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0xaa6):
undefined reference to_imp__getsockname@12' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock.o):b_sock.c:(.text+0xb22): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x27):
undefined reference to_imp__socket@12' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x4e): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x120):
undefined reference to_imp__setsockopt@20' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x15b): undefined reference to _imp__connect@12'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x1f5):
undefined reference to_imp__setsockopt@20' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x206): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x265):
undefined reference to_imp__WSAGetLastError@0' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x2c6): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x377):
undefined reference to_imp__getsockopt@20' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x38f): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x4a7):
undefined reference to_imp__setsockopt@20' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x4b4): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x53a):
undefined reference to_imp__bind@12' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x55f): undefined reference to _imp__listen@8'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x5a5):
undefined reference to_imp__setsockopt@20' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x5b6): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x63a):
undefined reference to_imp__setsockopt@20' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x64b): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x6b2):
undefined reference to_imp__WSAGetLastError@0' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x713): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x7a6):
undefined reference to_imp__accept@12' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x7e7): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x84b):
undefined reference to_imp__closesocket@4' C:\MyProjects\my-app\libraries\libcrypto.a(b_sock2.o):b_sock2.c:(.text+0x86c): undefined reference to _imp__closesocket@4'
C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x1b1):
undefined reference to_imp__WSASetLastError@4' C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x1d0): undefined reference to _imp__send@16'
C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x20a):
undefined reference to_imp__WSAGetLastError@0' C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x272): undefined reference to _imp__WSASetLastError@4'
C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x299):
undefined reference to_imp__send@16' C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x2ca): undefined reference to _imp__WSAGetLastError@0'
C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x33d):
undefined reference to_imp__WSASetLastError@4' C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x360): undefined reference to _imp__recv@16'
C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x39a):
undefined reference to_imp__WSAGetLastError@0' C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):bss_sock.c:(.text+0x457): undefined reference to _imp__WSAGetLastError@0'
c:/programs/mingw_w64_mingw32_gcc_stdthread_win32/bin/../lib/gcc/i686-w64-mingw32/4.8.1/../../../../i686-w64-mingw32/bin/ld.exe:
C:\MyProjects\my-app\libraries\libcrypto.a(bss_sock.o):
bad reloc address 0x24 in section.rdata' c:/programs/mingw_w64_mingw32_gcc_stdthread_win32/bin/../lib/gcc/i686-w64-mingw32/4.8.1/../../../../i686-w64-mingw32/bin/ld.exe: final link failed: Invalid operation collect2.exe: error: ld returned 1 exit status

11:58:21 Build Finished (took 11s.567ms)

我只需要将我完成的 C++ 项目与正确编译的(带有标记 no-async)的 OpenSSL 库链接起来，让它在旧版本的 Windows 下工作。

我很乐意就此问题获得任何帮助。

Answer 1

错误日志中的大部分(如果不是全部) undefined symbol 都来自 Winsock。尝试使用 -lws2_32 链接。