wolf SSL / Mbed 2 deprecated Example-client-tls-cert

Example TLS client with wolfSSL, with cert

Dependencies:   EthernetInterface NTPClient SDFileSystem mbed-rtos mbed wolfSSL

client-tls.cpp@2:53d82dd5e556, 2015-07-20 (annotated)

Committer:
wolfSSL
Date:
Mon Jul 20 08:39:55 2015 +0000
Revision:
2:53d82dd5e556
Parent:
1:29638701a63a
Child:
3:25d42ccf2f12
client-tls

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 0:ea20b58bf112 1 /* client-tcp.c
wolfSSL 0:ea20b58bf112 2 *
wolfSSL 0:ea20b58bf112 3 * Copyright (C) 2006-2015 wolfSSL Inc.
wolfSSL 0:ea20b58bf112 4 *
wolfSSL 0:ea20b58bf112 5 * This file is part of wolfSSL. (formerly known as CyaSSL)
wolfSSL 0:ea20b58bf112 6 *
wolfSSL 0:ea20b58bf112 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 0:ea20b58bf112 8 * it under the terms of the GNU General Public License as published by
wolfSSL 0:ea20b58bf112 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 0:ea20b58bf112 10 * (at your option) any later version.
wolfSSL 0:ea20b58bf112 11 *
wolfSSL 0:ea20b58bf112 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 0:ea20b58bf112 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 0:ea20b58bf112 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 0:ea20b58bf112 15 * GNU General Public License for more details.
wolfSSL 0:ea20b58bf112 16 *
wolfSSL 0:ea20b58bf112 17 * You should have received a copy of the GNU General Public License
wolfSSL 0:ea20b58bf112 18 * along with this program; if not, write to the Free Software
wolfSSL 0:ea20b58bf112 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
wolfSSL 0:ea20b58bf112 20 */
wolfSSL 0:ea20b58bf112 21
wolfSSL 0:ea20b58bf112 22 #include "mbed.h"
wolfSSL 0:ea20b58bf112 23 #include "EthernetInterface.h"
wolfSSL 2:53d82dd5e556 24 #include "SDFileSystem.h"
wolfSSL 0:ea20b58bf112 25 #include <stdio.h>
wolfSSL 0:ea20b58bf112 26 #include <stdlib.h>
wolfSSL 0:ea20b58bf112 27 #include <string.h>
wolfSSL 2:53d82dd5e556 28 #include <wolfssl/ssl.h> /* wolfSSL security library */
wolfSSL 2:53d82dd5e556 29 #include <user_settings.h>
wolfSSL 0:ea20b58bf112 30
wolfSSL 0:ea20b58bf112 31 #define MAXDATASIZE (1024*4)
wolfSSL 0:ea20b58bf112 32
wolfSSL 2:53d82dd5e556 33 #ifndef WOLFSSL_NO_VERIFYSERVER
wolfSSL 2:53d82dd5e556 34 SDFileSystem sdCard(PTE3, PTE1, PTE2, PTE4, "sd");
wolfSSL 2:53d82dd5e556 35 const char* cert = "/sd/cert-file.crt";
wolfSSL 2:53d82dd5e556 36 #endif
wolfSSL 2:53d82dd5e556 37
wolfSSL 2:53d82dd5e556 38 static int SocketReceive(WOLFSSL* ssl, char *buf, int sz, void *sock)
wolfSSL 2:53d82dd5e556 39 {
wolfSSL 2:53d82dd5e556 40 return ((TCPSocketConnection *)sock)->receive(buf, sz) ;
wolfSSL 2:53d82dd5e556 41 }
wolfSSL 2:53d82dd5e556 42
wolfSSL 2:53d82dd5e556 43 static int SocketSend(WOLFSSL* ssl, char *buf, int sz, void *sock)
wolfSSL 2:53d82dd5e556 44 {
wolfSSL 2:53d82dd5e556 45 return ((TCPSocketConnection *)sock)->send(buf, sz);
wolfSSL 2:53d82dd5e556 46 }
wolfSSL 2:53d82dd5e556 47
wolfSSL 0:ea20b58bf112 48 static int getline(char *prompt, char *buff, int size)
wolfSSL 0:ea20b58bf112 49 {
wolfSSL 0:ea20b58bf112 50 int sz ;
wolfSSL 0:ea20b58bf112 51
wolfSSL 0:ea20b58bf112 52 printf("%s", prompt) ;
wolfSSL 0:ea20b58bf112 53 for(sz = 0 ; (sz < size) && ((*buff = getchar()) != '\r'); sz++, buff++) {
wolfSSL 0:ea20b58bf112 54 putchar(*buff) ;
wolfSSL 0:ea20b58bf112 55 if(*buff == '\\') {
wolfSSL 0:ea20b58bf112 56 if(++sz >= size)break ;
wolfSSL 0:ea20b58bf112 57 *buff = getchar() ;
wolfSSL 0:ea20b58bf112 58 putchar(*buff) ;
wolfSSL 0:ea20b58bf112 59 switch(*buff) {
wolfSSL 0:ea20b58bf112 60 case 'n' :
wolfSSL 0:ea20b58bf112 61 *buff = '\n' ;
wolfSSL 0:ea20b58bf112 62 break ;
wolfSSL 0:ea20b58bf112 63 case 'r' :
wolfSSL 0:ea20b58bf112 64 *buff = '\r' ;
wolfSSL 0:ea20b58bf112 65 break ;
wolfSSL 0:ea20b58bf112 66 case 't' :
wolfSSL 0:ea20b58bf112 67 *buff = '\t' ;
wolfSSL 0:ea20b58bf112 68 break ;
wolfSSL 0:ea20b58bf112 69 case '\\':
wolfSSL 0:ea20b58bf112 70 *buff = '\\' ;
wolfSSL 0:ea20b58bf112 71 break ;
wolfSSL 0:ea20b58bf112 72 default:
wolfSSL 0:ea20b58bf112 73 buff[1] = buff[0] ;
wolfSSL 0:ea20b58bf112 74 buff[0] = '\\' ;
wolfSSL 0:ea20b58bf112 75 buff++ ;
wolfSSL 0:ea20b58bf112 76 }
wolfSSL 0:ea20b58bf112 77 } else if(*buff == '\b') {
wolfSSL 0:ea20b58bf112 78 if(sz >= 2) {
wolfSSL 0:ea20b58bf112 79 buff-=2 ;
wolfSSL 0:ea20b58bf112 80 sz-=2;
wolfSSL 0:ea20b58bf112 81 }
wolfSSL 0:ea20b58bf112 82 }
wolfSSL 0:ea20b58bf112 83 } ;
wolfSSL 0:ea20b58bf112 84 putchar('\n') ;
wolfSSL 0:ea20b58bf112 85 *buff = '\0' ;
wolfSSL 0:ea20b58bf112 86 return sz ;
wolfSSL 0:ea20b58bf112 87 }
wolfSSL 0:ea20b58bf112 88
wolfSSL 0:ea20b58bf112 89 /*
wolfSSL 0:ea20b58bf112 90 * clients initial contact with server. Socket to connect to: sock
wolfSSL 0:ea20b58bf112 91 */
wolfSSL 2:53d82dd5e556 92 int ClientGreet(TCPSocketConnection *socket, WOLFSSL *ssl)
wolfSSL 0:ea20b58bf112 93 {
wolfSSL 0:ea20b58bf112 94 /* data to send to the server, data recieved from the server */
wolfSSL 0:ea20b58bf112 95 char sendBuff[MAXDATASIZE], rcvBuff[MAXDATASIZE] = {0};
wolfSSL 0:ea20b58bf112 96 int ret ;
wolfSSL 0:ea20b58bf112 97
wolfSSL 0:ea20b58bf112 98 ret = getline("Message for server: ", sendBuff, MAXDATASIZE);
wolfSSL 0:ea20b58bf112 99 printf("Send[%d]:\n%s\n", ret, sendBuff) ;
wolfSSL 2:53d82dd5e556 100 if (wolfSSL_write(ssl, sendBuff, strlen(sendBuff)) < 0) {
wolfSSL 2:53d82dd5e556 101 /* the message is not able to send, or error trying */
wolfSSL 2:53d82dd5e556 102 ret = wolfSSL_get_error(ssl, 0);
wolfSSL 2:53d82dd5e556 103 printf("Write error: Error: %i\n", ret);
wolfSSL 0:ea20b58bf112 104 return EXIT_FAILURE;
wolfSSL 0:ea20b58bf112 105 }
wolfSSL 0:ea20b58bf112 106 printf("Recieved:\n");
wolfSSL 0:ea20b58bf112 107 while(1) {
wolfSSL 2:53d82dd5e556 108 if ((ret = wolfSSL_read(ssl, rcvBuff, sizeof(rcvBuff))) < 0) {
wolfSSL 0:ea20b58bf112 109 if(ret == 0)break ;
wolfSSL 2:53d82dd5e556 110 /* the server failed to send data, or error trying */
wolfSSL 2:53d82dd5e556 111 ret = wolfSSL_get_error(ssl, 0);
wolfSSL 0:ea20b58bf112 112 printf("Read error. Error: %i\n", ret);
wolfSSL 0:ea20b58bf112 113 return EXIT_FAILURE;
wolfSSL 0:ea20b58bf112 114 }
wolfSSL 0:ea20b58bf112 115 rcvBuff[ret] = '\0' ;
wolfSSL 0:ea20b58bf112 116 printf("%s", rcvBuff);
wolfSSL 0:ea20b58bf112 117 if((rcvBuff[ret-3] == '\n')&&
wolfSSL 0:ea20b58bf112 118 (rcvBuff[ret-2] == '\n')&&
wolfSSL 0:ea20b58bf112 119 (rcvBuff[ret-1] == '\n'))break ;
wolfSSL 0:ea20b58bf112 120 }
wolfSSL 0:ea20b58bf112 121 return ret;
wolfSSL 0:ea20b58bf112 122 }
wolfSSL 0:ea20b58bf112 123
wolfSSL 2:53d82dd5e556 124
wolfSSL 2:53d82dd5e556 125 /*
wolfSSL 2:53d82dd5e556 126 * applies TLS 1.2 security layer to data being sent.
wolfSSL 2:53d82dd5e556 127 */
wolfSSL 2:53d82dd5e556 128 int Security(TCPSocketConnection *socket)
wolfSSL 2:53d82dd5e556 129 {
wolfSSL 2:53d82dd5e556 130 WOLFSSL_CTX* ctx;
wolfSSL 2:53d82dd5e556 131 WOLFSSL* ssl; /* create WOLFSSL object */
wolfSSL 2:53d82dd5e556 132 int ret = 0;
wolfSSL 2:53d82dd5e556 133
wolfSSL 2:53d82dd5e556 134 /* create and initiLize WOLFSSL_CTX structure */
wolfSSL 2:53d82dd5e556 135 if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method())) == NULL) {
wolfSSL 2:53d82dd5e556 136 printf("SSL_CTX_new error.\n");
wolfSSL 2:53d82dd5e556 137 return EXIT_FAILURE;
wolfSSL 2:53d82dd5e556 138 }
wolfSSL 2:53d82dd5e556 139
wolfSSL 2:53d82dd5e556 140 wolfSSL_SetIORecv(ctx, SocketReceive) ;
wolfSSL 2:53d82dd5e556 141 wolfSSL_SetIOSend(ctx, SocketSend) ;
wolfSSL 2:53d82dd5e556 142
wolfSSL 2:53d82dd5e556 143 wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0);
wolfSSL 2:53d82dd5e556 144
wolfSSL 2:53d82dd5e556 145 if ((ssl = wolfSSL_new(ctx)) == NULL) {
wolfSSL 2:53d82dd5e556 146 printf("wolfSSL_new error.\n");
wolfSSL 2:53d82dd5e556 147 return EXIT_FAILURE;
wolfSSL 2:53d82dd5e556 148 }
wolfSSL 2:53d82dd5e556 149
wolfSSL 2:53d82dd5e556 150 wolfSSL_SetIOReadCtx(ssl, (void *)socket) ;
wolfSSL 2:53d82dd5e556 151 wolfSSL_SetIOWriteCtx(ssl, (void *)socket) ;
wolfSSL 2:53d82dd5e556 152
wolfSSL 2:53d82dd5e556 153 ret = wolfSSL_connect(ssl);
wolfSSL 2:53d82dd5e556 154 if (ret == SSL_SUCCESS) {
wolfSSL 2:53d82dd5e556 155 printf("TLS Connected\n") ;
wolfSSL 2:53d82dd5e556 156 ret = ClientGreet(socket, ssl);
wolfSSL 2:53d82dd5e556 157 } else {
wolfSSL 2:53d82dd5e556 158 ret = wolfSSL_get_error(ssl, 0);
wolfSSL 2:53d82dd5e556 159 printf("TLS Connect error. Error: %i\n", ret);
wolfSSL 2:53d82dd5e556 160 }
wolfSSL 2:53d82dd5e556 161 /* frees all data before client termination */
wolfSSL 2:53d82dd5e556 162 wolfSSL_free(ssl);
wolfSSL 2:53d82dd5e556 163 wolfSSL_CTX_free(ctx);
wolfSSL 2:53d82dd5e556 164 wolfSSL_Cleanup();
wolfSSL 2:53d82dd5e556 165
wolfSSL 2:53d82dd5e556 166 return ret;
wolfSSL 2:53d82dd5e556 167 }
wolfSSL 2:53d82dd5e556 168
wolfSSL 0:ea20b58bf112 169 /*
wolfSSL 0:ea20b58bf112 170 * command line argumentCount and argumentValues
wolfSSL 0:ea20b58bf112 171 */
wolfSSL 1:29638701a63a 172 void net_main(const void *av)
wolfSSL 0:ea20b58bf112 173 {
wolfSSL 1:29638701a63a 174 char server_addr[40] ;
wolfSSL 1:29638701a63a 175 char server_port[10] ;
wolfSSL 1:29638701a63a 176
wolfSSL 0:ea20b58bf112 177 EthernetInterface eth;
wolfSSL 0:ea20b58bf112 178 TCPSocketConnection socket;
wolfSSL 0:ea20b58bf112 179
wolfSSL 2:53d82dd5e556 180 wolfSSL_Init(); /* initialize wolfSSL */
wolfSSL 0:ea20b58bf112 181 eth.init(); //Use DHCP
wolfSSL 0:ea20b58bf112 182 eth.connect();
wolfSSL 0:ea20b58bf112 183 printf("Client Addr: %s\n", eth.getIPAddress());
wolfSSL 0:ea20b58bf112 184
wolfSSL 0:ea20b58bf112 185 getline("Server Addr: ", server_addr, sizeof(server_addr)) ;
wolfSSL 0:ea20b58bf112 186 getline("Server Port: ", server_port, sizeof(server_port)) ;
wolfSSL 0:ea20b58bf112 187
wolfSSL 0:ea20b58bf112 188 while (socket.connect(server_addr, atoi(server_port)) < 0) {
wolfSSL 0:ea20b58bf112 189 printf("Unable to connect to (%s) on port (%d)\n", server_addr, server_port);
wolfSSL 0:ea20b58bf112 190 wait(1.0);
wolfSSL 0:ea20b58bf112 191 }
wolfSSL 0:ea20b58bf112 192 printf("TCP Connected\n") ;
wolfSSL 0:ea20b58bf112 193
wolfSSL 2:53d82dd5e556 194 Security(&socket);
wolfSSL 1:29638701a63a 195 return ;
wolfSSL 1:29638701a63a 196 }
wolfSSL 1:29638701a63a 197
wolfSSL 1:29638701a63a 198 int main(void)
wolfSSL 1:29638701a63a 199 {
wolfSSL 1:29638701a63a 200 #define STACK_SIZE 24000
wolfSSL 1:29638701a63a 201 Thread t(net_main, NULL, osPriorityNormal, STACK_SIZE);
wolfSSL 1:29638701a63a 202 while(1)wait(1.0) ;
wolfSSL 0:ea20b58bf112 203 }