EVP_MD_CTX“错误:"ctx"的存储大小未知" [英] EVP_MD_CTX "error: storage size of ‘ctx’ isn’t known"

问题描述

我的系统是Ubuntu16.04 LTS.当我使用OpenSSL EVP_MD_CTX时，出现此错误.谁能帮我吗?

My system is Ubuntu16.04 LTS. when I use the OpenSSL EVP_MD_CTX, this error appeared. Can anyone help me?

CODE :

CODE:

#include <stdio.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
int main()
{
    int ret,inlen,outlen=0;
    unsigned long e=RSA_3;
    char data[100],out[500];
    EVP_MD_CTX md_ctx, md_ctx2;
    ...
}

错误 :

ERROR:

root@ubuntu:/work/test# gcc evp_openssl_test.c -I/usr/local/include -L/usr/local/lib -lssl -lcrypto -o
evptestevp_openssl_test.c: In function ‘main’:
evp_openssl_test.c:13:19: error: storage size of ‘md_ctx’ isn’t known
    EVP_MD_CTX md_ctx,md_ctx2;

推荐答案

您正在使用OpenSSL 1.1.0，这使该结构(以及许多其他结构)变得不透明-这意味着您无法对其进行堆栈分配.而是这样做:

You are using OpenSSL 1.1.0 which made this structure (and many others) opaque - which means you cannot stack allocate it. Instead do this:

EVP_MD_CTX *md_ctx;

md_ctx = EVP_MD_CTX_new();
if (md_ctx == NULL)
    ...
...
EVP_MD_CTX_free(md_ctx);

这篇关于EVP_MD_CTX“错误:"ctx"的存储大小未知"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！