291 lines
7.5 KiB
C
291 lines
7.5 KiB
C
/* client-tls-resume.c
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfSSL. (formerly known as CyaSSL)
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/* the usual suspects */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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/* socket includes */
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <unistd.h>
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/* wolfSSL */
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#include <wolfssl/options.h>
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#include <wolfssl/ssl.h>
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#define DEFAULT_PORT 11111
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#define CERT_FILE "../certs/ca-cert.pem"
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int main(int argc, char** argv)
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{
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int ret;
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int sockfd = SOCKET_INVALID;
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struct sockaddr_in servAddr;
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char buff[256];
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size_t len;
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/* declare wolfSSL objects */
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WOLFSSL_CTX* ctx = NULL;
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WOLFSSL* ssl = NULL;
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/* declare objects for session resuming */
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WOLFSSL_SESSION* session = NULL;
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WOLFSSL* sslRes = NULL;
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/* Check for proper calling convention */
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if (argc != 2) {
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printf("usage: %s <IPv4 address>\n", argv[0]);
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return 0;
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}
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/* Initialize wolfSSL */
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wolfSSL_Init();
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/* Create a socket that uses an internet IPv4 address,
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* Sets the socket to be stream based (TCP),
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* 0 means choose the default protocol. */
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if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
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fprintf(stderr, "ERROR: failed to create the socket\n");
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ret = -1;
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goto exit;
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}
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/* Create and initialize WOLFSSL_CTX */
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if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method())) == NULL) {
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fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
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ret = -1;
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goto exit;
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}
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/* Load client certificates into WOLFSSL_CTX */
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if ((ret = wolfSSL_CTX_load_verify_locations(ctx, CERT_FILE, NULL))
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!= WOLFSSL_SUCCESS) {
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fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
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CERT_FILE);
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goto exit;
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}
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/* Initialize the server address struct with zeros */
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memset(&servAddr, 0, sizeof(servAddr));
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/* Fill in the server address */
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servAddr.sin_family = AF_INET; /* using IPv4 */
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servAddr.sin_port = htons(DEFAULT_PORT); /* on DEFAULT_PORT */
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/* Get the server IPv4 address from the command line call */
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if (inet_pton(AF_INET, argv[1], &servAddr.sin_addr) != 1) {
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fprintf(stderr, "ERROR: invalid address\n");
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ret = -1;
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goto exit;
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}
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/* Connect to the server */
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if (connect(sockfd, (struct sockaddr*) &servAddr, sizeof(servAddr))
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== -1) {
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fprintf(stderr, "ERROR: failed to connect\n");
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ret = -1;
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goto exit;
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}
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/* Create a WOLFSSL object */
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if ((ssl = wolfSSL_new(ctx)) == NULL) {
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fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
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ret = -1;
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goto exit;
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}
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/* Attach wolfSSL to the socket */
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wolfSSL_set_fd(ssl, sockfd);
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/* Connect to wolfSSL on the server side */
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if ((ret = wolfSSL_connect(ssl)) != WOLFSSL_SUCCESS) {
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fprintf(stderr, "ERROR: failed to connect to wolfSSL\n");
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goto exit;
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}
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/* Get a message for the server from stdin */
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printf("Message for server: ");
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memset(buff, 0, sizeof(buff));
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if (fgets(buff, sizeof(buff), stdin) == NULL) {
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fprintf(stderr, "ERROR: failed to to get message for server\n");
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ret = -1;
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goto exit;
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}
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len = strnlen(buff, sizeof(buff));
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/* Send the message to the server */
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if ((ret = wolfSSL_write(ssl, buff, len)) != len) {
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fprintf(stderr, "ERROR: failed to write\n");
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goto exit;
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}
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/* Read the server data into our buff array */
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memset(buff, 0, sizeof(buff));
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if (wolfSSL_read(ssl, buff, sizeof(buff)-1) < 0) {
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fprintf(stderr, "ERROR: failed to read\n");
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ret = -1;
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goto exit;
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}
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/* Print to stdout any data the server sends */
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printf("Server: %s\n", buff);
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/* Save the session */
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session = wolfSSL_get_session(ssl);
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/* Close the socket */
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wolfSSL_free(ssl);
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close(sockfd);
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/* --------------------------------------- *
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* we are now disconnected from the server *
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* --------------------------------------- */
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/* Create a new WOLFSSL object to resume with */
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if ((sslRes = wolfSSL_new(ctx)) == NULL) {
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fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
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ret = -1;
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goto exit;
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}
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/* Set up to resume the session */
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if ((ret = wolfSSL_set_session(sslRes, session)) != WOLFSSL_SUCCESS) {
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fprintf(stderr, "ERROR: failed to set session\n");
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goto exit;
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}
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/* Get a new socket */
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if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
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fprintf(stderr, "ERROR: failed to create the socket\n");
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ret = -1;
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goto exit;
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}
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/* Reconnect to the server */
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if (connect(sockfd, (struct sockaddr*) &servAddr, sizeof(servAddr))
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== -1) {
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fprintf(stderr, "ERROR: failed to connect\n");
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ret = -1;
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goto exit;
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}
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/* Attach wolfSSL to the socket */
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wolfSSL_set_fd(sslRes, sockfd);
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/* Reconnect to wolfSSL */
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if ((ret = wolfSSL_connect(sslRes)) != WOLFSSL_SUCCESS) {
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fprintf(stderr, "ERROR: failed to connect to wolfSSL\n");
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goto exit;
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}
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/* Test if the resume was successful */
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if (wolfSSL_session_reused(sslRes)) {
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printf("Session ID reused; Successful resume.\n");
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}
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else {
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printf("Session ID not reused; Successful resume.\n");
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}
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/* Get a message for the server from stdin */
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printf("Message for server: ");
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memset(buff, 0, sizeof(buff));
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if (fgets(buff, sizeof(buff), stdin) == NULL) {
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fprintf(stderr, "ERROR: failed to get message for server\n");
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ret = -1;
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goto exit;
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}
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len = strnlen(buff, sizeof(buff));
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/* Send the message to the server */
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if ((ret = wolfSSL_write(sslRes, buff, len)) != len) {
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fprintf(stderr, "ERROR: failed to write\n");
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goto exit;
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}
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/* Read the server data into our buff array */
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memset(buff, 0, sizeof(buff));
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if (wolfSSL_read(sslRes, buff, sizeof(buff)-1) < 0) {
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fprintf(stderr, "ERROR: failed to read\n");
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ret = -1;
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goto exit;
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}
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/* Print to stdout any data the server sends */
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printf("Server: %s\n", buff);
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ret = 0;
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exit:
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/* Cleanup and return */
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if (ssl)
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wolfSSL_free(ssl); /* Free the wolfSSL object */
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#ifdef OPENSSL_EXTRA
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if (session)
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wolfSSL_SESSION_free(session);
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#endif
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if (sockfd != SOCKET_INVALID)
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close(sockfd); /* Close the socket */
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if (ctx)
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wolfSSL_CTX_free(ctx); /* Free the wolfSSL context object */
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wolfSSL_Cleanup(); /* Cleanup the wolfSSL environment */
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return ret; /* Return reporting a success */
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}
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