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POSSL connection with OpenSSL on specified port
 

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  1. POSSL connection with OpenSSL on specified port
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    <p>I have to connect to some server with URL host/getdata?reqtype=generate&amp;login=xxx&amp;pass=xxx&amp;dest=yyy using SSL.</p> <p>I'm using code snippet shown below but I can't get any data from server. </p> <pre><code>CRYPTO_malloc_init(); SSL_library_init(); SSL_load_error_strings(); ERR_load_BIO_strings(); OpenSSL_add_all_algorithms(); SSL_CTX* ctx = SSL_CTX_new(SSLv23_client_method()); SSL* ssl; BIO* bio = BIO_new_ssl_connect(ctx); char *host = "host:8888"; char *con_protocol = ""; const char *REQUEST_PROTO = "GET /getdata?reqtype=generate&amp;login=xxx&amp;pass=xxx&amp;dest=yyy HTTP/1.1\nHost: %s\nAccept: */*\nConnection: keep-alive\n\n"; char *con_string = (char*)calloc((strlen(host)+strlen(con_protocol))+1, sizeof(char)); strcat(con_string, host); strcat(con_string, con_protocol); // Failure? if (bio == NULL) { printf("Error creating BIO!\n"); ERR_print_errors_fp(stderr); // We need to free up the SSL_CTX before we leave. SSL_CTX_free(ctx); return; } // Makes ssl point to bio's SSL object. BIO_get_ssl(bio, &amp;ssl); // Set the SSL to automatically retry on failure. SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); printf("connection string : %s\n", con_string); BIO_set_conn_hostname(bio, con_string); // Same as before, try to connect. int y = BIO_do_connect(bio); if (y &lt;= 0) { printf("Failed to connect!\nError code : %d\n", y); BIO_free_all(bio); SSL_CTX_free(ctx); return; } // Now we need to do the SSL handshake, so we can communicate. if (BIO_do_handshake(bio) &lt;= 0) { printf("Failed to do SSL handshake!\n"); BIO_free_all(bio); SSL_CTX_free(ctx); return; } // Create a buffer for grabbing information from the page. char buf[1024]; memset(buf, 0, sizeof(buf)); // Create a buffer for the reqest we'll send to the server char send[1024]; memset(send, 0, sizeof(send)); size_t total_size = strlen(REQUEST_PROTO)+strlen(host); int t_size = (int)total_size+1; char *my_buf = malloc(t_size*sizeof(char)); snprintf(my_buf, t_size, REQUEST_PROTO, host); printf("my_buf : %s\n", my_buf); BIO_puts(bio, my_buf); int temp = 0; int begin = 0; char *key_buff = (char *)calloc(32, sizeof(char)); while (1) { int bytes_read = BIO_read(bio, buf, sizeof(buf) - 1); printf("bytes_read == %d\n", bytes_read); if (bytes_read == 0) { break; } else if (bytes_read &lt; 0) { if (!BIO_should_retry(bio)) { printf("\nRead Failed!\n"); BIO_free_all(bio); SSL_CTX_free(ctx); return; } } // We actually got some data, without errors! else { // Null-terminate our buffer, just in case buf[bytes_read] = 0; if ((bytes_read != 0) &amp;&amp; (temp)) { for (begin; begin&lt;(bytes_read+begin); begin++) { key_buff[begin] = buf[begin]; } } if (!temp) { temp = bytes_read; } } } BIO_free_all(bio); SSL_CTX_free(ctx); printf("key : %s\n\n", buf); </code></pre> <p>I've checked connection with CURL. When using command <code>curl --insecure 'https://localhost:8888/getdata?reqtype=generate&amp;login=xxx&amp;pass=xxx&amp;dest=yyy'</code> everything works, but when I remove 'http' from command, I get empty response as in the application. Unfortunately I can't add 'http' in BIO_set_conn_hostname() function. Some ideas what is wrong? </p>
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    1. COIs there any reason that you can't use an HTTP library like curl to do the hard work for you?
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