Add client-tls-http.c example

Author: yota22721

tls/client-tls-http.c

@@ -0,0 +1,207 @@
+/* client-tls-http.c
+ *
+ * Copyright (C) 2006-2022 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL. (formerly known as CyaSSL)
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/* the usual suspects */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include<stdint.h>
+#include<sys/types.h>
+
+/* socket includes */
+#include <sys/socket.h>
+#include<netdb.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <unistd.h>
+
+/* wolfSSL */
+#include <wolfssl/options.h>
+#include <wolfssl/ssl.h>
+
+#define DEFAULT_PORT 443
+
+
+int main(int argc, char** argv)
+{
+    int                sockfd;
+    struct sockaddr_in servAddr;
+    struct in_addr     addr;
+    struct addrinfo hints,*res;
+    char               buff[256];
+    size_t             len;
+    int                ret;
+
+    /* declare wolfSSL objects */
+    WOLFSSL_CTX* ctx;
+    WOLFSSL*     ssl;
+
+    /* Check for proper calling convention */
+    if (argc != 3) {
+        printf("usage: %s <SERVER_NAME> <CERT_FILE>\n", argv[0]);
+        return 0;
+    }
+
+    /* Initialize the addrinfo struct with zero */
+    memset(&hints,0,sizeof(hints));
+
+    /* Fill in the addrinfo struct */
+    hints.ai_family = AF_INET;       /* using IPv4 */
+    hints.ai_socktype = SOCK_STREAM; /* means TCP socket */
+    char *service = "https";         /* using https */
+
+    /* Get a Domain IP address */
+    if(getaddrinfo(argv[1],service,&hints,&res) != 0){
+        fprintf(stderr, "ERROR: failed to get the server ip\n");
+        ret = -1;
+        goto end;
+    }
+    
+    /* Assign server IP to in_addr struct */
+    addr.s_addr = ((struct sockaddr_in *)(res->ai_addr))->sin_addr.s_addr;
+
+    /* Free a list pointed by res */
+    freeaddrinfo(res);
+
+    /* Create a socket that uses an internet IPv4 address,
+     * Sets the socket to be stream based (TCP),
+     * 0 means choose the default protocol. */
+    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
+        fprintf(stderr, "ERROR: failed to create the socket\n");
+        ret = -1;
+        goto end;
+    }
+
+    /* Initialize the server address struct with zeros */
+    memset(&servAddr, 0, sizeof(servAddr));
+    
+    /* Fill in the server address */
+    servAddr.sin_family = AF_INET;             /* using IPv4      */
+    servAddr.sin_port   = htons(DEFAULT_PORT); /* on DEFAULT_PORT */
+    
+    /* Get the server IPv4 address using adderinfo struct 
+     * convert bytes to const char* via inet_ntoa() */
+    if (inet_pton(AF_INET, inet_ntoa(addr), &servAddr.sin_addr) != 1) {
+        fprintf(stderr, "ERROR: invalid address\n");
+        ret = -1;
+        goto end;
+    }
+
+    /* Connect to the server */
+    if ((ret = connect(sockfd, (struct sockaddr*) &servAddr, sizeof(servAddr)))
+         == -1) {
+        fprintf(stderr, "ERROR: failed to connect\n");
+        goto end;
+    }
+
+    
+
+    /*---------------------------------*/
+    /* Start of wolfSSL initialization and configuration */
+    /*---------------------------------*/
+    /* Initialize wolfSSL */
+    if ((ret = wolfSSL_Init()) != WOLFSSL_SUCCESS) {
+        fprintf(stderr, "ERROR: Failed to initialize the library\n");
+        goto socket_cleanup;
+    }
+
+    /* Create and initialize WOLFSSL_CTX */
+    if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method())) == NULL) {
+        fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
+        ret = -1;
+        goto socket_cleanup;
+    }
+
+    /* Load client certificates into WOLFSSL_CTX */
+    if ((ret = wolfSSL_CTX_load_verify_locations(ctx, argv[2], NULL))
+         != SSL_SUCCESS) {
+        fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
+                argv[2]);
+        goto ctx_cleanup;
+    }
+
+    /* Create a WOLFSSL object */
+    if ((ssl = wolfSSL_new(ctx)) == NULL) {
+        fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
+        ret = -1;
+        goto ctx_cleanup;
+    }
+
+    /* Attach wolfSSL to the socket */
+    if ((ret = wolfSSL_set_fd(ssl, sockfd)) != WOLFSSL_SUCCESS) {
+        fprintf(stderr, "ERROR: Failed to set the file descriptor\n");
+        goto cleanup;
+    }
+
+    /* Connect to wolfSSL on the server side */
+    if ((ret = wolfSSL_connect(ssl)) != SSL_SUCCESS) {
+        fprintf(stderr, "ERROR: failed to connect to wolfSSL\n");
+        printf("%d\n",ret);
+        goto cleanup;
+    }
+
+    /* Get a message for the server from stdin */
+    printf("Message for server: ");
+    memset(buff, 0, sizeof(buff));
+    if (fgets(buff, sizeof(buff), stdin) == NULL) {
+        fprintf(stderr, "ERROR: failed to get message for server\n");
+        ret = -1;
+        goto cleanup;
+    }
+    len = strnlen(buff, sizeof(buff));
+
+    /* Send the message to the server */
+    if ((ret = wolfSSL_write(ssl, buff, len)) != len) {
+        fprintf(stderr, "ERROR: failed to write entire message\n");
+        fprintf(stderr, "%d bytes of %d bytes were sent", ret, (int) len);
+        goto cleanup;
+    }
+
+    /* Read the server data into our buff array */
+    memset(buff, 0, sizeof(buff));
+    if ((ret = wolfSSL_read(ssl, buff, sizeof(buff)-1)) == -1) {
+        fprintf(stderr, "ERROR: failed to read\n");
+        goto cleanup;
+    }
+
+    /* Print to stdout any data the server sends */
+    printf("Server: %s\n", buff);
+
+    /* Bidirectional shutdown */
+    while (wolfSSL_shutdown(ssl) == SSL_SHUTDOWN_NOT_DONE) {
+        printf("Shutdown not complete\n");
+    }
+
+    printf("Shutdown complete\n");
+
+    ret = 0;
+
+    /* Cleanup and return */
+cleanup:
+    wolfSSL_free(ssl);      /* Free the wolfSSL object                  */
+ctx_cleanup:
+    wolfSSL_CTX_free(ctx);  /* Free the wolfSSL context object          */
+    wolfSSL_Cleanup();      /* Cleanup the wolfSSL environment          */
+socket_cleanup:
+    close(sockfd);          /* Close the connection to the server       */
+end:
+    return ret;               /* Return reporting a success               */
+}