wolf SSL / Mbed 2 deprecated Example-client-tls

Example TLS client with wolfSSL

Dependencies:   EthernetInterface-FRDM-k64F mbed-rtos mbed wolfSSL-TLS13-Beta Example-client-tls

Dependents:   Example-client-tls

client-tls.cpp@11:d542a6eed78a, 2017-08-22 (annotated)

Committer:
wolfSSL
Date:
Tue Aug 22 11:05:49 2017 +0000
Revision:
11:d542a6eed78a
Parent:
10:37e38ee43b8f 
wolfSSL-3.12.0 - TLS1.3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 0:e23aa8e6ab2f 1 /* client-tcp.c
wolfSSL 0:e23aa8e6ab2f 2 *
wolfSSL 6:12068e6dc456 3 * Copyright (C) 2006-2017 wolfSSL Inc.
wolfSSL 0:e23aa8e6ab2f 4 *
wolfSSL 0:e23aa8e6ab2f 5 * This file is part of wolfSSL. (formerly known as CyaSSL)
wolfSSL 0:e23aa8e6ab2f 6 *
wolfSSL 0:e23aa8e6ab2f 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 0:e23aa8e6ab2f 8 * it under the terms of the GNU General Public License as published by
wolfSSL 0:e23aa8e6ab2f 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 0:e23aa8e6ab2f 10 * (at your option) any later version.
wolfSSL 0:e23aa8e6ab2f 11 *
wolfSSL 0:e23aa8e6ab2f 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 0:e23aa8e6ab2f 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 0:e23aa8e6ab2f 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 0:e23aa8e6ab2f 15 * GNU General Public License for more details.
wolfSSL 0:e23aa8e6ab2f 16 *
wolfSSL 0:e23aa8e6ab2f 17 * You should have received a copy of the GNU General Public License
wolfSSL 0:e23aa8e6ab2f 18 * along with this program; if not, write to the Free Software
wolfSSL 0:e23aa8e6ab2f 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
wolfSSL 0:e23aa8e6ab2f 20 */
wolfSSL 0:e23aa8e6ab2f 21
wolfSSL 0:e23aa8e6ab2f 22 #include "mbed.h"
wolfSSL 0:e23aa8e6ab2f 23 #include "EthernetInterface.h"
wolfSSL 0:e23aa8e6ab2f 24 #include <stdio.h>
wolfSSL 0:e23aa8e6ab2f 25 #include <stdlib.h>
wolfSSL 0:e23aa8e6ab2f 26 #include <string.h>
wolfSSL 2:76d10d65ce5b 27 #include <wolfssl/ssl.h> /* wolfSSL security library */
wolfSSL 2:76d10d65ce5b 28 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 2:76d10d65ce5b 29 #include <user_settings.h>
wolfSSL 0:e23aa8e6ab2f 30
wolfSSL 0:e23aa8e6ab2f 31 #define MAXDATASIZE (1024*4)
wolfSSL 0:e23aa8e6ab2f 32
wolfSSL 2:76d10d65ce5b 33 static int SocketReceive(WOLFSSL* ssl, char *buf, int sz, void *sock)
wolfSSL 2:76d10d65ce5b 34 {
wolfSSL 2:76d10d65ce5b 35 return ((TCPSocketConnection *)sock)->receive(buf, sz) ;
wolfSSL 2:76d10d65ce5b 36 }
wolfSSL 2:76d10d65ce5b 37
wolfSSL 2:76d10d65ce5b 38 static int SocketSend(WOLFSSL* ssl, char *buf, int sz, void *sock)
wolfSSL 2:76d10d65ce5b 39 {
wolfSSL 2:76d10d65ce5b 40 return ((TCPSocketConnection *)sock)->send(buf, sz);
wolfSSL 2:76d10d65ce5b 41 }
wolfSSL 2:76d10d65ce5b 42
wolfSSL 0:e23aa8e6ab2f 43 static int getline(char *prompt, char *buff, int size)
wolfSSL 0:e23aa8e6ab2f 44 {
wolfSSL 0:e23aa8e6ab2f 45 int sz ;
wolfSSL 6:12068e6dc456 46
wolfSSL 0:e23aa8e6ab2f 47 printf("%s", prompt) ;
wolfSSL 0:e23aa8e6ab2f 48 for(sz = 0 ; (sz < size) && ((*buff = getchar()) != '\r'); sz++, buff++) {
wolfSSL 0:e23aa8e6ab2f 49 putchar(*buff) ;
wolfSSL 0:e23aa8e6ab2f 50 if(*buff == '\\') {
wolfSSL 0:e23aa8e6ab2f 51 if(++sz >= size)break ;
wolfSSL 0:e23aa8e6ab2f 52 *buff = getchar() ;
wolfSSL 0:e23aa8e6ab2f 53 putchar(*buff) ;
wolfSSL 0:e23aa8e6ab2f 54 switch(*buff) {
wolfSSL 0:e23aa8e6ab2f 55 case 'n' :
wolfSSL 0:e23aa8e6ab2f 56 *buff = '\n' ;
wolfSSL 0:e23aa8e6ab2f 57 break ;
wolfSSL 0:e23aa8e6ab2f 58 case 'r' :
wolfSSL 0:e23aa8e6ab2f 59 *buff = '\r' ;
wolfSSL 0:e23aa8e6ab2f 60 break ;
wolfSSL 0:e23aa8e6ab2f 61 case 't' :
wolfSSL 0:e23aa8e6ab2f 62 *buff = '\t' ;
wolfSSL 0:e23aa8e6ab2f 63 break ;
wolfSSL 0:e23aa8e6ab2f 64 case '\\':
wolfSSL 0:e23aa8e6ab2f 65 *buff = '\\' ;
wolfSSL 0:e23aa8e6ab2f 66 break ;
wolfSSL 0:e23aa8e6ab2f 67 default:
wolfSSL 0:e23aa8e6ab2f 68 buff[1] = buff[0] ;
wolfSSL 0:e23aa8e6ab2f 69 buff[0] = '\\' ;
wolfSSL 0:e23aa8e6ab2f 70 buff++ ;
wolfSSL 0:e23aa8e6ab2f 71 }
wolfSSL 0:e23aa8e6ab2f 72 } else if(*buff == '\b') {
wolfSSL 0:e23aa8e6ab2f 73 if(sz >= 2) {
wolfSSL 0:e23aa8e6ab2f 74 buff-=2 ;
wolfSSL 0:e23aa8e6ab2f 75 sz-=2;
wolfSSL 0:e23aa8e6ab2f 76 }
wolfSSL 0:e23aa8e6ab2f 77 }
wolfSSL 0:e23aa8e6ab2f 78 } ;
wolfSSL 0:e23aa8e6ab2f 79 putchar('\n') ;
wolfSSL 0:e23aa8e6ab2f 80 *buff = '\0' ;
wolfSSL 0:e23aa8e6ab2f 81 return sz ;
wolfSSL 0:e23aa8e6ab2f 82 }
wolfSSL 0:e23aa8e6ab2f 83
wolfSSL 0:e23aa8e6ab2f 84 /*
wolfSSL 0:e23aa8e6ab2f 85 * clients initial contact with server. Socket to connect to: sock
wolfSSL 0:e23aa8e6ab2f 86 */
wolfSSL 6:12068e6dc456 87 int ClientGreet(TCPSocketConnection *socket, WOLFSSL *ssl)
wolfSSL 0:e23aa8e6ab2f 88 {
wolfSSL 0:e23aa8e6ab2f 89 /* data to send to the server, data recieved from the server */
wolfSSL 0:e23aa8e6ab2f 90 char sendBuff[MAXDATASIZE], rcvBuff[MAXDATASIZE] = {0};
wolfSSL 0:e23aa8e6ab2f 91 int ret ;
wolfSSL 0:e23aa8e6ab2f 92
wolfSSL 0:e23aa8e6ab2f 93 ret = getline("Message for server: ", sendBuff, MAXDATASIZE);
wolfSSL 0:e23aa8e6ab2f 94 printf("Send[%d]:\n%s\n", ret, sendBuff) ;
wolfSSL 2:76d10d65ce5b 95 if (wolfSSL_write(ssl, sendBuff, strlen(sendBuff)) < 0) {
wolfSSL 2:76d10d65ce5b 96 /* the message is not able to send, or error trying */
wolfSSL 2:76d10d65ce5b 97 ret = wolfSSL_get_error(ssl, 0);
wolfSSL 2:76d10d65ce5b 98 printf("Write error[%d]\n", ret, wc_GetErrorString(ret));
wolfSSL 0:e23aa8e6ab2f 99 return EXIT_FAILURE;
wolfSSL 0:e23aa8e6ab2f 100 }
wolfSSL 6:12068e6dc456 101
wolfSSL 6:12068e6dc456 102 if ((ret = wolfSSL_read(ssl, rcvBuff, sizeof(rcvBuff)-1)) < 0) {
wolfSSL 6:12068e6dc456 103 /* the server failed to send data, or error trying */
wolfSSL 6:12068e6dc456 104 ret = wolfSSL_get_error(ssl, 0);
wolfSSL 6:12068e6dc456 105 printf("Read error[%d], %s\n", ret, wc_GetErrorString(ret));
wolfSSL 6:12068e6dc456 106 return EXIT_FAILURE;
wolfSSL 0:e23aa8e6ab2f 107 }
wolfSSL 6:12068e6dc456 108 rcvBuff[ret] = '\0' ;
wolfSSL 6:12068e6dc456 109 printf("Recieved: %s\n", rcvBuff);
wolfSSL 6:12068e6dc456 110
wolfSSL 0:e23aa8e6ab2f 111 return ret;
wolfSSL 0:e23aa8e6ab2f 112 }
wolfSSL 0:e23aa8e6ab2f 113
wolfSSL 2:76d10d65ce5b 114
wolfSSL 2:76d10d65ce5b 115 /*
wolfSSL 2:76d10d65ce5b 116 * applies TLS 1.2 security layer to data being sent.
wolfSSL 2:76d10d65ce5b 117 */
wolfSSL 2:76d10d65ce5b 118 int Security(TCPSocketConnection *socket)
wolfSSL 2:76d10d65ce5b 119 {
wolfSSL 2:76d10d65ce5b 120 WOLFSSL_CTX* ctx;
wolfSSL 2:76d10d65ce5b 121 WOLFSSL* ssl; /* create WOLFSSL object */
wolfSSL 2:76d10d65ce5b 122 int ret = 0;
wolfSSL 2:76d10d65ce5b 123
wolfSSL 2:76d10d65ce5b 124 /* create and initiLize WOLFSSL_CTX structure */
wolfSSL 9:0b93e8d9a31c 125 #ifdef WOLFSSL_TLS13
wolfSSL 6:12068e6dc456 126 if ((ctx = wolfSSL_CTX_new(wolfTLSv1_3_client_method())) == NULL) {
wolfSSL 9:0b93e8d9a31c 127 #else
wolfSSL 2:76d10d65ce5b 128 if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method())) == NULL) {
wolfSSL 9:0b93e8d9a31c 129 #endif
wolfSSL 2:76d10d65ce5b 130 printf("SSL_CTX_new error.\n");
wolfSSL 2:76d10d65ce5b 131 return EXIT_FAILURE;
wolfSSL 2:76d10d65ce5b 132 }
wolfSSL 3:97197dea8a38 133 wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0);
wolfSSL 2:76d10d65ce5b 134 wolfSSL_SetIORecv(ctx, SocketReceive) ;
wolfSSL 2:76d10d65ce5b 135 wolfSSL_SetIOSend(ctx, SocketSend) ;
wolfSSL 2:76d10d65ce5b 136
wolfSSL 2:76d10d65ce5b 137 if ((ssl = wolfSSL_new(ctx)) == NULL) {
wolfSSL 2:76d10d65ce5b 138 printf("wolfSSL_new error.\n");
wolfSSL 2:76d10d65ce5b 139 return EXIT_FAILURE;
wolfSSL 2:76d10d65ce5b 140 }
wolfSSL 2:76d10d65ce5b 141
wolfSSL 2:76d10d65ce5b 142 wolfSSL_SetIOReadCtx(ssl, (void *)socket) ;
wolfSSL 2:76d10d65ce5b 143 wolfSSL_SetIOWriteCtx(ssl, (void *)socket) ;
wolfSSL 2:76d10d65ce5b 144
wolfSSL 2:76d10d65ce5b 145 ret = wolfSSL_connect(ssl);
wolfSSL 2:76d10d65ce5b 146 if (ret == SSL_SUCCESS) {
wolfSSL 2:76d10d65ce5b 147 printf("TLS Connected\n") ;
wolfSSL 2:76d10d65ce5b 148 ret = ClientGreet(socket, ssl);
wolfSSL 2:76d10d65ce5b 149 } else {
wolfSSL 2:76d10d65ce5b 150 ret = wolfSSL_get_error(ssl, 0);
wolfSSL 2:76d10d65ce5b 151 printf("TLS Connect error[%d], %s\n", ret, wc_GetErrorString(ret));
wolfSSL 6:12068e6dc456 152 return EXIT_FAILURE;
wolfSSL 2:76d10d65ce5b 153 }
wolfSSL 2:76d10d65ce5b 154 /* frees all data before client termination */
wolfSSL 2:76d10d65ce5b 155 wolfSSL_free(ssl);
wolfSSL 2:76d10d65ce5b 156 wolfSSL_CTX_free(ctx);
wolfSSL 2:76d10d65ce5b 157 wolfSSL_Cleanup();
wolfSSL 2:76d10d65ce5b 158
wolfSSL 2:76d10d65ce5b 159 return ret;
wolfSSL 2:76d10d65ce5b 160 }
wolfSSL 2:76d10d65ce5b 161
wolfSSL 0:e23aa8e6ab2f 162 /*
wolfSSL 0:e23aa8e6ab2f 163 * command line argumentCount and argumentValues
wolfSSL 0:e23aa8e6ab2f 164 */
wolfSSL 2:76d10d65ce5b 165 void net_main(const void *av)
wolfSSL 0:e23aa8e6ab2f 166 {
wolfSSL 0:e23aa8e6ab2f 167 char server_addr[40] ;
wolfSSL 0:e23aa8e6ab2f 168 char server_port[10] ;
wolfSSL 6:12068e6dc456 169
wolfSSL 5:76ad456ac3f0 170 printf("Starting TLS Client,...\n") ;
wolfSSL 2:76d10d65ce5b 171 wolfSSL_Init(); /* initialize wolfSSL */
wolfSSL 2:76d10d65ce5b 172 /* wolfSSL_Debugging_ON(); */
wolfSSL 0:e23aa8e6ab2f 173 EthernetInterface eth;
wolfSSL 0:e23aa8e6ab2f 174 TCPSocketConnection socket;
wolfSSL 0:e23aa8e6ab2f 175
wolfSSL 0:e23aa8e6ab2f 176 eth.init(); //Use DHCP
wolfSSL 4:0cd0d8c9af1e 177 while(1) {
wolfSSL 4:0cd0d8c9af1e 178 if(eth.connect() == 0)break ;
wolfSSL 4:0cd0d8c9af1e 179 printf("Retry\n") ;
wolfSSL 4:0cd0d8c9af1e 180 }
wolfSSL 0:e23aa8e6ab2f 181 printf("Client Addr: %s\n", eth.getIPAddress());
wolfSSL 0:e23aa8e6ab2f 182
wolfSSL 0:e23aa8e6ab2f 183 getline("Server Addr: ", server_addr, sizeof(server_addr)) ;
wolfSSL 0:e23aa8e6ab2f 184 getline("Server Port: ", server_port, sizeof(server_port)) ;
wolfSSL 6:12068e6dc456 185
wolfSSL 0:e23aa8e6ab2f 186 while (socket.connect(server_addr, atoi(server_port)) < 0) {
wolfSSL 0:e23aa8e6ab2f 187 printf("Unable to connect to (%s) on port (%s)\n", server_addr, server_port);
wolfSSL 0:e23aa8e6ab2f 188 wait(1.0);
wolfSSL 0:e23aa8e6ab2f 189 }
wolfSSL 0:e23aa8e6ab2f 190 printf("TCP Connected\n") ;
wolfSSL 0:e23aa8e6ab2f 191
wolfSSL 2:76d10d65ce5b 192 Security(&socket);
wolfSSL 0:e23aa8e6ab2f 193 return ;
wolfSSL 0:e23aa8e6ab2f 194 }
wolfSSL 2:76d10d65ce5b 195
wolfSSL 2:76d10d65ce5b 196 int main(void)
wolfSSL 2:76d10d65ce5b 197 {
wolfSSL 5:76ad456ac3f0 198
wolfSSL 2:76d10d65ce5b 199 #define STACK_SIZE 24000
wolfSSL 2:76d10d65ce5b 200 Thread t(net_main, NULL, osPriorityNormal, STACK_SIZE);
wolfSSL 2:76d10d65ce5b 201 while(1)wait(1.0) ;
wolfSSL 2:76d10d65ce5b 202 }