我正在尝试将 openssl 与 Visual Studio C 项目一起使用。
我使用 Visual Studio nmake 命令编译 openssl,然后使用以下命令将所有内容安装到预定义文件夹 (C:\openssl):
nmake install
文件夹结构如下:
include/openssl 里面有 .h 头文件。
在我的 Visual studio 2012 中,我创建了一个空的通用 C++ 项目并包含 C:\openssl\include
[Project properties -> C/C++ -> General -> Additional Include Directories]
我还添加了 lib 目录和 .lib 文件。
但是当我编译代码时,我得到
left of 'key_len' specifies undefined struct/union 'evp_cipher_st'
在我的代码中我有这些行
const EVP_CIPHER *cipher = EVP_get_cipherbyname("aes-256-cbc");
//some other code
return cipher->key_len;
查看 ossl_typ.h 文件中的 evp_cipher_st 定义,它被声明为
typedef struct evp_cipher_st EVP_CIPHER;
并且结构体没有定义!
深入研究源代码树,evp_cipher_st 是在 crypto\include\internal\evp_int.h 中定义的,该文件不包含在 openssl 安装文件夹的 include 文件夹中。
我还尝试包含 crypto\include\internal\evp_int.h 开箱即用,但它会导致更多问题。
知道如何解决这个问题吗?
UPDATE:
这是完整的功能和我的主要功能,包括所有内容:
#include <winsock2.h>
#include <Ws2tcpip.h>
#include <mswsock.h>
#include <windows.h>
#include <minwindef.h>
#include <malloc.h>
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef int socklen_t;
#include "wingetopt.h"
#include <Wincrypt.h>
#include <iphlpapi.h>
#include "Shlwapi.h"
#include <Bcrypt.h>
#define inline __inline
#define STATUS_SUCCESS 0
#pragma comment(lib, "iphlpapi.lib")
#pragma comment(lib, "Ws2_32.lib")
#pragma comment(lib, "Shlwapi.lib")
#include <sys/stat.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <fcntl.h>
#include <time.h>
int generate_aes_key(const unsigned char *input_key, uint16_t input_key_size,
unsigned char *output_key, uint16_t *outputkey_size) {
const EVP_MD *dgst = NULL;
unsigned char iv[EVP_MAX_IV_LENGTH];
const EVP_CIPHER *cipher = EVP_get_cipherbyname("aes-256-cbc");
if(!cipher) {
return -1;
}
dgst = EVP_get_digestbyname("sha256");
if(!dgst) {
fprintf(stderr, "no such digest\n");
return -2;
}
if(!EVP_BytesToKey(cipher, dgst, NULL, input_key, input_key_size, 1, output_key, iv)) {
return -3;
}
*outputkey_size = (uint16_t)cipher->key_len;
return 0;
}
int main(int argc, char *argv[]) {
char secret[] = "MIIFBTCCAu2gAwIBAgICEAAwDQYJKoZIhvcNAQELBQAwTjELMAkGA1UEBhMCR0Ix";
unsigned char shared_secret[500];
uint16_t aes_keylen = 0;
//bunch of codes
if(generate_aes_key((unsigned char *)secret, strlen(secret), shared_secret, &aes_keylen) < 0) {
fprintf(stderr, "Could not get initial shared secret\n");
return 0;
}
//other codes
}
Openssl 版本是:
OpenSSL_1_1_0-pre6-1266-g487d3a726
上面的版本是来自 git 的最新标签名称,我认为它是迄今为止最新鲜的一个。最新提交版本和日期如下:
487d3a726a1970e84853434561d88cb4ac212d15
作者:EasySec 日期:2017 年 1 月 17 日星期二 17:21:55 +0100
最后是 Visual Studio 2012 编译输出:
Build started 1/28/2017 8:23:02 PM.
1>Project "C:\CODE\mycode.vcxproj" on node 2 (Build target(s)).
1>ClCompile:
C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin\CL.exe /c /I"c:\openssl\include" /ZI /nologo /W3 /WX- /Od /Oy- /D _MBCS /Gm /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Fo"Debug\\" /Fd"Debug\vc110.pdb" /Gd /TC /analyze- /errorReport:prompt src\main.c ...
wingetopt.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
crypto.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
1>c:\CODE\src\crypto.c(517): error C2037: left of 'key_len' specifies undefined struct/union 'evp_cipher_st'
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
client.c
1>c:\openssl\include\openssl\lhash.h(198): warning C4090: 'function' : different 'const' qualifiers
Generating Code...
1>Done Building Project "C:\CODE\mycode.vcxproj" (Build target(s)) -- FAILED.
Build FAILED.
Time Elapsed 00:00:08.55