指出下面代码的问题 运行出现了段错误 #include <openssl/ssl.h> #include <openssl/bio.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <netinet/in.h> #include <netdb.h> #include <sys/socket.h> #include <openssl/err.h> void parse_url(char *url, char *protocol, char *domain, char path) { char ptr; if (strncmp(url, "http://", 7) == 0) { strcpy(protocol, "http"); ptr = url + 7; } else if (strncmp(url, "https://", 8) == 0) { strcpy(protocol, "https"); ptr = url + 8; } else { strcpy(protocol, ""); ptr = url; } char domain_end = strstr(ptr, "/"); if (domain_end == NULL) { strcpy(domain, ptr); strcpy(path, ""); } else { int len = domain_end - ptr; strncpy(domain, ptr, len); domain[len] = '\0'; strcpy(path, domain_end); } } int https_communication(char url, char message, char response) { int sockfd, err; struct sockaddr_in serv_addr; struct hostent *server; SSL_CTX *ctx; SSL *ssl; char buf[1024]; printf("test1111 " ); // 创建socket sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd < 0) { perror("ERROR opening socket"); return -1; } // 获取主机信息 server = gethostbyname(url); printf("test1111 " ); if (server == NULL) { perror("ERROR, no such host"); return -1; } // 设置服务地址 printf("test1111 " ); bzero((char *) &serv_addr, sizeof(serv_addr)); serv_addr.sin_family = AF_INET; bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length); serv_addr.sin_port = htons(443); printf("test222 " ); // 连接服务器 if (connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0) { perror("ERROR connecting"); return -1; } // 初始化SSL SSL_library_init(); ctx = SSL_CTX_new(TLS_method()); if (ctx == NULL) { perror("SSL_CTX_new"); return (-1); } // 设置支持的协议版本为 TLSv1.2 SSL_CTX_set_min_proto_version(ctx, TLS1_2_VERSION); SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION); //ctx = SSL_CTX_new(TLSv1_2_client_method()); if (ctx == NULL) { perror("ERROR creating SSL context"); return -1; } printf("test1111 " ); // 创建SSL套接字 ssl = SSL_new(ctx); SSL_set_fd(ssl, sockfd); // SSL握手 err = SSL_connect(ssl); if (err < 0) { perror("ERROR performing SSL handshake"); return -1; } printf("test1111 " ); // 发送消息 char request[1024]; sprintf(request, "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n", message, url); err = SSL_write(ssl, request, strlen(request)); if (err < 0) { perror("ERROR writing to socket"); return -1; } printf("test1111 " ); // 接收响应 bzero(buf, sizeof(buf)); err = SSL_read(ssl, buf, sizeof(buf)-1); if (err < 0) { perror("ERROR reading from socket"); return -1; } printf("test1111999999999 " ); strcpy(response, buf); // 关闭SSL套接字 SSL_free(ssl); SSL_CTX_free(ctx); // 关闭socket close(sockfd); return 0; } int main() { //char *url = "https://otaapi-sit.lotuscars.com.cn/v50/vehicle/api/register"; //char protocol[10], domain[100], path[1000]; //parse_url(url, protocol, domain, path); //printf("protocol: %s\n", protocol); //printf("domain: %s\n", domain); //printf("path: %s\n", path); char *url = "otaapi-sit.lotuscars.com.cn"; //const char *cert_path="/home/pi/Cdaima/certDHU.pem"; char *payload= "{"timestamp":1685523498,"sdkVersion":"1.0.30_1","vin":"LJUBMSA24PKFFF198","sign":"696c3034f04f2bd80c8929089a0deea8cf4812574b002a555f8af663e500c4ce"}"; char *response=NULL; //https_request(cert_path,payload,url) ; //gethostbyname(url); https_communication(url, payload, response); return 0; } 请给出调用函数的示例

以下是调用 https_communication 函数的示例代码：

int main() {
    char *url = "https://otaapi-sit.lotuscars.com.cn/v50/vehicle/api/register";
    char message[1024];
    char response[1024];
    parse_url(url, NULL, message, NULL);
    https_communication(url, message, response);
    printf("Response: %s\n", response);
    return 0;
}

需要注意的是，调用 https_communication 函数之前，需要先调用 parse_url 函数解析出 message 参数。另外，在调用 https_communication 函数之后，可以通过 response 参数获取响应内容。

相关问题

指出下面代码的问题 运行出现了段错误 #include <openssl/ssl.h> #include <openssl/bio.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <netinet/in.h> #include <netdb.h> #include <sys/socket.h> #include <openssl/err.h> void parse_url(char *url, char *protocol, char *domain, char path) { char ptr; if (strncmp(url, "http://", 7) == 0) { strcpy(protocol, "http"); ptr = url + 7; } else if (strncmp(url, "https://", 8) == 0) { strcpy(protocol, "https"); ptr = url + 8; } else { strcpy(protocol, ""); ptr = url; } char domain_end = strstr(ptr, "/"); if (domain_end == NULL) { strcpy(domain, ptr); strcpy(path, ""); } else { int len = domain_end - ptr; strncpy(domain, ptr, len); domain[len] = '\0'; strcpy(path, domain_end); } } int https_communication(char url, char message, char response) { int sockfd, err; struct sockaddr_in serv_addr; struct hostent *server; SSL_CTX *ctx; SSL *ssl; char buf[1024]; printf("test1111 " ); // 创建socket sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd < 0) { perror("ERROR opening socket"); return -1; } // 获取主机信息 server = gethostbyname(url); printf("test1111 " ); if (server == NULL) { perror("ERROR, no such host"); return -1; } // 设置服务地址 printf("test1111 " ); bzero((char *) &serv_addr, sizeof(serv_addr)); serv_addr.sin_family = AF_INET; bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length); serv_addr.sin_port = htons(443); printf("test222 " ); // 连接服务器 if (connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0) { perror("ERROR connecting"); return -1; } // 初始化SSL SSL_library_init(); ctx = SSL_CTX_new(TLS_method()); if (ctx == NULL) { perror("SSL_CTX_new"); return (-1); } // 设置支持的协议版本为 TLSv1.2 SSL_CTX_set_min_proto_version(ctx, TLS1_2_VERSION); SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION); //ctx = SSL_CTX_new(TLSv1_2_client_method()); if (ctx == NULL) { perror("ERROR creating SSL context"); return -1; } printf("test1111 " ); // 创建SSL套接字 ssl = SSL_new(ctx); SSL_set_fd(ssl, sockfd); // SSL握手 err = SSL_connect(ssl); if (err < 0) { perror("ERROR performing SSL handshake"); return -1; } printf("test1111 " ); // 发送消息 char request[1024]; sprintf(request, "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n", message, url); err = SSL_write(ssl, request, strlen(request)); if (err < 0) { perror("ERROR writing to socket"); return -1; } printf("test1111 " ); // 接收响应 bzero(buf, sizeof(buf)); err = SSL_read(ssl, buf, sizeof(buf)-1); if (err < 0) { perror("ERROR reading from socket"); return -1; } printf("test1111999999999 " ); strcpy(response, buf); // 关闭SSL套接字 SSL_free(ssl); SSL_CTX_free(ctx); // 关闭socket close(sockfd); return 0; } int main() { //char *url = "https://otaapi-sit.lotuscars.com.cn/v50/vehicle/api/register"; //char protocol[10], domain[100], path[1000]; //parse_url(url, protocol, domain, path); //printf("protocol: %s\n", protocol); //printf("domain: %s\n", domain); //printf("path: %s\n", path); char *url = "otaapi-sit.lotuscars.com.cn"; //const char *cert_path="/home/pi/Cdaima/certDHU.pem"; char *payload= "{"timestamp":1685523498,"sdkVersion":"1.0.30_1","vin":"LJUBMSA24PKFFF198","sign":"696c3034f04f2bd80c8929089a0deea8cf4812574b002a555f8af663e500c4ce"}"; char *response=NULL; //https_request(cert_path,payload,url) ; //gethostbyname(url); https_communication(url, payload, response); return 0; }

这段代码存在以下问题：

1. 函数声明和调用中的参数类型错误，url, message, response应该是字符数组类型，而不是字符类型。

2. parse_url函数中的path参数类型应该是字符数组类型而不是字符类型。

3. parse_url函数中的domain_end变量应该是字符指针类型而不是字符类型。

4. parse_url函数中的path参数应该使用strcpy函数而不是赋值操作。

5. https_communication函数中的response指针没有被初始化，应该先为其分配内存。

6. https_communication函数中的payload参数类型应该是字符指针类型而不是字符类型。

7. https_communication函数中的buf数组可能存在溢出问题，应该使用sizeof(buf)-1来避免。

8. 在https_communication函数中，SSL_library_init()应该在SSL_CTX_new()之前调用。

下面的代码 参数证书路径 对应的证书需要是什么格式的 #include <openssl/ssl.h> #include <openssl/bio.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> int https_request(const char* cert_file, const char* payload) { SSL_CTX* ctx = NULL; SSL* ssl = NULL; BIO* bio = NULL; int ret = -1; SSL_library_init(); ctx = SSL_CTX_new(SSLv23_client_method()); if(!ctx) { fprintf(stderr, "SSL_CTX_new failed!\n"); goto END; } if(SSL_CTX_load_verify_locations(ctx, cert_file, NULL) <= 0) { fprintf(stderr, "SSL_CTX_load_verify_locations failed!\n"); goto END; } if(SSL_CTX_use_certificate_file(ctx, cert_file, SSL_FILETYPE_PEM) <= 0) { fprintf(stderr, "SSL_CTX_use_certificate_file failed!\n"); goto END; } if(SSL_CTX_use_PrivateKey_file(ctx, cert_file, SSL_FILETYPE_PEM) <= 0) { fprintf(stderr, "SSL_CTX_use_PrivateKey_file failed!\n"); goto END; } bio = BIO_new_ssl_connect(ctx); if(!bio) { fprintf(stderr, "BIO_new_ssl_connect failed!\n"); goto END; } if(BIO_set_conn_hostname(bio, "www.example.com:https") <= 0) { fprintf(stderr, "BIO_set_conn_hostname failed!\n"); goto END; } BIO_get_ssl(bio, &ssl); if(!ssl) { fprintf(stderr, "BIO_get_ssl failed!\n"); goto END; } SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); if(BIO_do_connect(bio) <= 0) { fprintf(stderr, "BIO_do_connect failed!\n"); goto END; } if(SSL_get_verify_result(ssl) != X509_V_OK) { fprintf(stderr, "SSL_get_verify_result error!\n"); goto END; } if(BIO_write(bio, payload, strlen(payload)) <= 0) { fprintf(stderr, "BIO_write failed!\n"); goto END; } char buf[1024] = {0}; int n = 0; while((n = BIO_read(bio, buf, sizeof(buf))) > 0) { fwrite(buf, 1, n, stdout); } ret = 0; END: if(bio) { BIO_free_all(bio); } if(ctx) { SSL_CTX_free(ctx); } return ret; }

该代码中的参数证书路径对应的证书需要是 PEM 格式的。其中 SSL_CTX_use_certificate_file 和 SSL_CTX_use_PrivateKey_file 函数加载的证书也需要是 PEM 格式的。在 SSL_CTX_load_verify_locations 函数中，如果第二个参数为 NULL，则使用系统默认的证书库。如果需要使用自定义的证书库，则可以通过第二个参数指定证书库的路径。