Merge pull request #171 from dgarske/tls_bio

Added TLS client example for using the BIO compatibility layer

.gitignore

@@ -70,6 +70,7 @@ android/wolfssljni-ndk-sample/proguard-project.txt
 
 /tls/client-tcp
 /tls/client-tls
+/tls/client-tls-bio
 /tls/client-tls-cacb
 /tls/client-tls-callback
 /tls/client-tls-ecdhe

tls/client-tls-bio.c

@@ -0,0 +1,161 @@
+/* client-tls-bio.c
+ *
+ * Copyright (C) 2006-2019 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
+ */
+
+/* standard library */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+/* socket includes */
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <unistd.h>
+
+/* wolfSSL */
+#include <wolfssl/options.h>
+#include <wolfssl/ssl.h>
+
+#define DEFAULT_PORT 11111
+#define CERT_FILE "../certs/ca-cert.pem"
+
+/* Example Usage:
+ * ./examples/server/server -d
+ *
+ * ./client-tls-bio 127.0.0.1
+ * creating new WOLFSSL BIO type to write and read with
+ * Message for server: asdf
+ * Server: I hear you fa shizzle!
+ */
+
+int main(int argc, char** argv)
+{
+#ifdef OPENSSL_EXTRA
+    int                sockfd;
+    struct sockaddr_in servAddr;
+    char               buff[256];
+    size_t             len;
+
+    /* declare wolfSSL objects */
+    WOLFSSL_CTX* ctx;
+    WOLFSSL*     ssl;
+    WOLFSSL_BIO* bio;
+
+    /* Check for proper calling convention */
+    if (argc != 2) {
+        printf("usage: %s <IPv4 address>\n", argv[0]);
+        return 0;
+    }
+
+    /* Initialize wolfSSL */
+    wolfSSL_Init();
+
+    /* 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");
+        return -1;
+    }
+
+    /* Create and initialize WOLFSSL_CTX */
+    if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method())) == NULL) {
+        fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
+        return -1;
+    }
+
+    /* Load client certificates into WOLFSSL_CTX */
+    if (wolfSSL_CTX_load_verify_locations(ctx, CERT_FILE, NULL)!= SSL_SUCCESS) {
+        fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
+                CERT_FILE);
+        return -1;
+    }
+
+    /* 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 from the command line call */
+    if (inet_pton(AF_INET, argv[1], &servAddr.sin_addr) != 1) {
+        fprintf(stderr, "ERROR: invalid address\n");
+        return -1;
+    }
+
+    /* Connect to the server */
+    if (connect(sockfd, (struct sockaddr*) &servAddr, sizeof(servAddr))
+        == -1) {
+        fprintf(stderr, "ERROR: failed to connect\n");
+        return -1;
+    }
+
+    /* Create a WOLFSSL object */
+    if ((ssl = wolfSSL_new(ctx)) == NULL) {
+        fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
+        return -1;
+    }
+
+    /* Attach wolfSSL to the socket */
+    wolfSSL_set_fd(ssl, sockfd);
+
+    printf("creating new WOLFSSL BIO type to write and read with\n");
+    bio = wolfSSL_BIO_new(wolfSSL_BIO_f_ssl());
+    if (bio == NULL) {
+        return -1;
+    }
+    wolfSSL_BIO_set_ssl(bio, ssl, BIO_CLOSE); /* with BIO_CLOSE wolfSSL_BIO_free will free ssl */
+
+    /* Get a message for the server from stdin */
+    printf("Message for server: ");
+    memset(buff, 0, sizeof(buff));
+    fgets(buff, sizeof(buff), stdin);
+    len = strnlen(buff, sizeof(buff));
+
+    /* Send the message to the server */
+    if (wolfSSL_BIO_write(bio, buff, len) != len) {
+        fprintf(stderr, "ERROR: failed to write\n");
+        return -1;
+    }
+
+    /* Read the server data into our buff array */
+    memset(buff, 0, sizeof(buff));
+    if (wolfSSL_BIO_read(bio, buff, sizeof(buff)-1) == -1) {
+        fprintf(stderr, "ERROR: failed to read\n");
+        return -1;
+    }
+
+    /* Print to stdout any data the server sends */
+    printf("Server: %s\n", buff);
+
+    /* Cleanup and return */
+    wolfSSL_BIO_free(bio);  /* Free the wolfSSL object                  */
+    close(sockfd);          /* Close the connection to the server       */
+
+    wolfSSL_CTX_free(ctx);  /* Free the wolfSSL context object          */
+    wolfSSL_Cleanup();      /* Cleanup the wolfSSL environment          */
+
+#else
+    printf("This example requires ./configure --enable-opensslextra or OPENSSL_EXTRA to be defined\n");
+#endif
+    return 0;               /* Return reporting a success               */
+}