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wolfssl/examples/echoserver/echoserver.c
Sean Parkinson 8851065848 cppcheck fixes 
Fix checking of negative with unsigned variables.
Check digestSz for 0 in wc_SSH_KDF() so that no possibility of dividing
by zero.
Change XMEMCPY to XMEMSET in renesas_sce_util.c.
Fix test.c to free prvTmp and pubTmp on read error.
Remove unused variables.
XFREE checks for NULL so don't check before call.
Move variable declarations to reduce scope.
2023-04-03 16:59:58 +10:00

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/* echoserver.c
*
* Copyright (C) 2006-2023 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* 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 02110-1335, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cyassl/ssl.h> /* name change portability layer */
#include <cyassl/ctaocrypt/settings.h>
#ifdef HAVE_ECC
#include <cyassl/ctaocrypt/ecc.h> /* ecc_fp_free */
#endif
#if defined(WOLFSSL_MDK_ARM) || defined(WOLFSSL_KEIL_TCP_NET)
#include <stdio.h>
#include <string.h>
#include "cmsis_os.h"
#include "rl_fs.h"
#include "rl_net.h"
#include "wolfssl_MDK_ARM.h"
#endif
#include <cyassl/ssl.h>
#include <cyassl/test.h>
#ifndef NO_MAIN_DRIVER
#define ECHO_OUT
#endif
#include "examples/echoserver/echoserver.h"
#ifndef NO_WOLFSSL_SERVER
#ifdef NO_FILESYSTEM
#ifdef NO_RSA
#error currently the example only tries to load in a RSA buffer
#endif
#undef USE_CERT_BUFFERS_2048
#define USE_CERT_BUFFERS_2048
#include <wolfssl/certs_test.h>
#endif
#ifdef WOLFSSL_ASYNC_CRYPT
static int devId = INVALID_DEVID;
#endif
#define SVR_COMMAND_SIZE 256
static void SignalReady(void* args, word16 port)
{
#if defined(_POSIX_THREADS) && defined(NO_MAIN_DRIVER) && !defined(__MINGW32__)
/* signal ready to tcp_accept */
func_args* server_args = (func_args*)args;
tcp_ready* ready = server_args->signal;
PTHREAD_CHECK_RET(pthread_mutex_lock(&ready->mutex));
ready->ready = 1;
ready->port = port;
PTHREAD_CHECK_RET(pthread_cond_signal(&ready->cond));
PTHREAD_CHECK_RET(pthread_mutex_unlock(&ready->mutex));
#endif
(void)args;
(void)port;
}
THREAD_RETURN CYASSL_THREAD echoserver_test(void* args)
{
SOCKET_T sockfd = 0;
CYASSL_METHOD* method = 0;
CYASSL_CTX* ctx = 0;
int ret = 0;
int doDTLS = 0;
int doPSK;
int outCreated = 0;
int shutDown = 0;
int useAnyAddr = 0;
word16 port;
int argc = ((func_args*)args)->argc;
char** argv = ((func_args*)args)->argv;
char buffer[CYASSL_MAX_ERROR_SZ];
#ifdef HAVE_TEST_SESSION_TICKET
MyTicketCtx myTicketCtx;
#endif
#ifdef ECHO_OUT
FILE* fout = stdout;
if (argc >= 2) {
fout = fopen(argv[1], "w");
outCreated = 1;
}
if (!fout) err_sys("can't open output file");
#endif
(void)outCreated;
(void)argc;
(void)argv;
((func_args*)args)->return_code = -1; /* error state */
#ifdef CYASSL_DTLS
doDTLS = 1;
#endif
#if (defined(NO_RSA) && !defined(HAVE_ECC) && !defined(HAVE_ED25519) && \
!defined(HAVE_ED448)) || defined(CYASSL_LEANPSK)
doPSK = 1;
#else
doPSK = 0;
#endif
#if defined(NO_MAIN_DRIVER) && !defined(CYASSL_SNIFFER) && \
!defined(WOLFSSL_MDK_SHELL) && !defined(CYASSL_TIRTOS) && \
!defined(USE_WINDOWS_API)
/* Let tcp_listen assign port */
port = 0;
#else
/* Use default port */
port = wolfSSLPort;
#endif
#if defined(USE_ANY_ADDR)
useAnyAddr = 1;
#endif
#ifdef CYASSL_TIRTOS
fdOpenSession(Task_self());
#endif
tcp_listen(&sockfd, &port, useAnyAddr, doDTLS, 0);
#if defined(CYASSL_DTLS)
#ifdef WOLFSSL_DTLS13
method = wolfDTLSv1_3_server_method();
#elif !defined(WOLFSSL_NO_TLS12)
method = CyaDTLSv1_2_server_method();
#endif
#elif !defined(NO_TLS)
#if defined(WOLFSSL_TLS13) && defined(WOLFSSL_SNIFFER)
method = CyaTLSv1_2_server_method();
#else
method = CyaSSLv23_server_method();
#endif
#elif defined(WOLFSSL_ALLOW_SSLV3)
method = CyaSSLv3_server_method();
#else
#error "no valid server method built in"
#endif
ctx = CyaSSL_CTX_new(method);
/* CyaSSL_CTX_set_session_cache_mode(ctx, WOLFSSL_SESS_CACHE_OFF); */
#ifdef WOLFSSL_ENCRYPTED_KEYS
CyaSSL_CTX_set_default_passwd_cb(ctx, PasswordCallBack);
#endif
#ifdef HAVE_TEST_SESSION_TICKET
if (TicketInit() != 0)
err_sys("unable to setup Session Ticket Key context");
wolfSSL_CTX_set_TicketEncCb(ctx, myTicketEncCb);
XMEMSET(&myTicketCtx, 0, sizeof(myTicketCtx));
wolfSSL_CTX_set_TicketEncCtx(ctx, &myTicketCtx);
#endif
#ifndef NO_FILESYSTEM
if (doPSK == 0) {
#if defined(HAVE_ECC) && !defined(CYASSL_SNIFFER)
/* ecc */
if (CyaSSL_CTX_use_certificate_file(ctx, eccCertFile, WOLFSSL_FILETYPE_PEM)
!= WOLFSSL_SUCCESS)
err_sys("can't load server cert file, "
"Please run from wolfSSL home dir");
if (CyaSSL_CTX_use_PrivateKey_file(ctx, eccKeyFile, WOLFSSL_FILETYPE_PEM)
!= WOLFSSL_SUCCESS)
err_sys("can't load server key file, "
"Please run from wolfSSL home dir");
#elif defined(HAVE_ED25519) && !defined(CYASSL_SNIFFER)
/* ed25519 */
if (CyaSSL_CTX_use_certificate_chain_file(ctx, edCertFile)
!= WOLFSSL_SUCCESS)
err_sys("can't load server cert file, "
"Please run from wolfSSL home dir");
if (CyaSSL_CTX_use_PrivateKey_file(ctx, edKeyFile, WOLFSSL_FILETYPE_PEM)
!= WOLFSSL_SUCCESS)
err_sys("can't load server key file, "
"Please run from wolfSSL home dir");
#elif defined(HAVE_ED448) && !defined(CYASSL_SNIFFER)
/* ed448 */
if (CyaSSL_CTX_use_certificate_chain_file(ctx, ed448CertFile)
!= WOLFSSL_SUCCESS)
err_sys("can't load server cert file, "
"Please run from wolfSSL home dir");
if (CyaSSL_CTX_use_PrivateKey_file(ctx, ed448KeyFile,
WOLFSSL_FILETYPE_PEM) != WOLFSSL_SUCCESS)
err_sys("can't load server key file, "
"Please run from wolfSSL home dir");
#elif defined(NO_CERTS)
/* do nothing, just don't load cert files */
#else
/* normal */
if (CyaSSL_CTX_use_certificate_file(ctx, svrCertFile, WOLFSSL_FILETYPE_PEM)
!= WOLFSSL_SUCCESS)
err_sys("can't load server cert file, "
"Please run from wolfSSL home dir");
if (CyaSSL_CTX_use_PrivateKey_file(ctx, svrKeyFile, WOLFSSL_FILETYPE_PEM)
!= WOLFSSL_SUCCESS)
err_sys("can't load server key file, "
"Please run from wolfSSL home dir");
#endif
} /* doPSK */
#elif !defined(NO_CERTS)
if (!doPSK) {
if (CyaSSL_CTX_use_certificate_buffer(ctx, server_cert_der_2048,
sizeof_server_cert_der_2048, WOLFSSL_FILETYPE_ASN1)
!= WOLFSSL_SUCCESS)
err_sys("can't load server cert buffer");
if (CyaSSL_CTX_use_PrivateKey_buffer(ctx, server_key_der_2048,
sizeof_server_key_der_2048, WOLFSSL_FILETYPE_ASN1)
!= WOLFSSL_SUCCESS)
err_sys("can't load server key buffer");
}
#endif
#if defined(CYASSL_SNIFFER)
/* Only set if not running testsuite */
if (XSTRSTR(argv[0], "testsuite") == NULL) {
/* don't use EDH, can't sniff tmp keys */
CyaSSL_CTX_set_cipher_list(ctx, "AES256-SHA");
}
#endif
if (doPSK) {
#ifndef NO_PSK
const char *defaultCipherList;
CyaSSL_CTX_set_psk_server_callback(ctx, my_psk_server_cb);
CyaSSL_CTX_use_psk_identity_hint(ctx, "cyassl server");
#ifdef HAVE_NULL_CIPHER
defaultCipherList = "PSK-NULL-SHA256";
#elif defined(HAVE_AESGCM) && !defined(NO_DH)
#ifdef WOLFSSL_TLS13
defaultCipherList = "TLS13-AES128-GCM-SHA256"
#ifndef WOLFSSL_NO_TLS12
":DHE-PSK-AES128-GCM-SHA256"
#endif
;
#else
defaultCipherList = "DHE-PSK-AES128-GCM-SHA256";
#endif
#elif defined(HAVE_AESGCM) && defined(WOLFSSL_TLS13)
defaultCipherList = "TLS13-AES128-GCM-SHA256"
#ifndef WOLFSSL_NO_TLS12
":PSK-AES128-GCM-SHA256"
#endif
;
#else
defaultCipherList = "PSK-AES128-CBC-SHA256";
#endif
if (CyaSSL_CTX_set_cipher_list(ctx, defaultCipherList) != WOLFSSL_SUCCESS)
err_sys("server can't set cipher list 2");
wolfSSL_CTX_set_psk_callback_ctx(ctx, (void*)defaultCipherList);
#endif
}
#ifdef WOLFSSL_ASYNC_CRYPT
ret = wolfAsync_DevOpen(&devId);
if (ret < 0) {
fprintf(stderr, "Async device open failed\nRunning without async\n");
}
wolfSSL_CTX_SetDevId(ctx, devId);
#endif /* WOLFSSL_ASYNC_CRYPT */
SignalReady(args, port);
while (!shutDown) {
CYASSL* ssl = NULL;
CYASSL* write_ssl = NULL; /* may have separate w/ HAVE_WRITE_DUP */
char command[SVR_COMMAND_SIZE+1];
int clientfd;
int firstRead = 1;
int gotFirstG = 0;
int err = 0;
SOCKADDR_IN_T client;
socklen_t client_len = sizeof(client);
#ifndef CYASSL_DTLS
clientfd = accept(sockfd, (struct sockaddr*)&client,
(ACCEPT_THIRD_T)&client_len);
#else
clientfd = sockfd;
{
/* For DTLS, peek at the next datagram so we can get the client's
* address and set it into the ssl object later to generate the
* cookie. */
int n;
byte b[1500];
n = (int)recvfrom(clientfd, (char*)b, sizeof(b), MSG_PEEK,
(struct sockaddr*)&client, &client_len);
if (n <= 0)
err_sys("recvfrom failed");
}
#endif
if (WOLFSSL_SOCKET_IS_INVALID(clientfd)) err_sys("tcp accept failed");
ssl = CyaSSL_new(ctx);
if (ssl == NULL) err_sys("SSL_new failed");
CyaSSL_set_fd(ssl, clientfd);
#ifdef CYASSL_DTLS
wolfSSL_dtls_set_peer(ssl, &client, client_len);
#endif
#if !defined(NO_FILESYSTEM) && !defined(NO_DH) && !defined(NO_ASN)
CyaSSL_SetTmpDH_file(ssl, dhParamFile, WOLFSSL_FILETYPE_PEM);
#elif !defined(NO_DH)
SetDH(ssl); /* will repick suites with DHE, higher than PSK */
#endif
do {
err = 0; /* Reset error */
ret = CyaSSL_accept(ssl);
if (ret != WOLFSSL_SUCCESS) {
err = CyaSSL_get_error(ssl, 0);
#ifdef WOLFSSL_ASYNC_CRYPT
if (err == WC_PENDING_E) {
ret = wolfSSL_AsyncPoll(ssl, WOLF_POLL_FLAG_CHECK_HW);
if (ret < 0) break;
}
#endif
}
} while (err == WC_PENDING_E);
if (ret != WOLFSSL_SUCCESS) {
fprintf(stderr, "SSL_accept error = %d, %s\n", err,
CyaSSL_ERR_error_string(err, buffer));
fprintf(stderr, "SSL_accept failed\n");
CyaSSL_free(ssl);
CloseSocket(clientfd);
continue;
}
#if defined(PEER_INFO)
showPeer(ssl);
#endif
#ifdef HAVE_WRITE_DUP
write_ssl = wolfSSL_write_dup(ssl);
if (write_ssl == NULL) {
fprintf(stderr, "wolfSSL_write_dup failed\n");
CyaSSL_free(ssl);
CloseSocket(clientfd);
continue;
}
#else
write_ssl = ssl;
#endif
while (1) {
int echoSz;
do {
err = 0; /* reset error */
ret = CyaSSL_read(ssl, command, sizeof(command)-1);
if (ret <= 0) {
err = CyaSSL_get_error(ssl, 0);
#ifdef WOLFSSL_ASYNC_CRYPT
if (err == WC_PENDING_E) {
ret = wolfSSL_AsyncPoll(ssl, WOLF_POLL_FLAG_CHECK_HW);
if (ret < 0) break;
}
#endif
}
} while (err == WC_PENDING_E);
if (ret <= 0) {
if (err != WOLFSSL_ERROR_WANT_READ && err != WOLFSSL_ERROR_ZERO_RETURN){
fprintf(stderr, "SSL_read echo error %d, %s!\n", err,
CyaSSL_ERR_error_string(err, buffer));
}
break;
}
echoSz = ret;
if (firstRead == 1) {
firstRead = 0; /* browser may send 1 byte 'G' to start */
if (echoSz == 1 && command[0] == 'G') {
gotFirstG = 1;
continue;
}
}
else if (gotFirstG == 1 && strncmp(command, "ET /", 4) == 0) {
strncpy(command, "GET", 4);
/* fall through to normal GET */
}
if ( strncmp(command, "quit", 4) == 0) {
printf("client sent quit command: shutting down!\n");
shutDown = 1;
break;
}
if ( strncmp(command, "break", 5) == 0) {
printf("client sent break command: closing session!\n");
break;
}
#ifdef PRINT_SESSION_STATS
if ( strncmp(command, "printstats", 10) == 0) {
CyaSSL_PrintSessionStats();
break;
}
#endif
if (strncmp(command, "GET", 3) == 0) {
const char resp[] =
"HTTP/1.0 200 ok\r\nContent-type: text/html\r\n\r\n"
"<html><body BGCOLOR=\"#ffffff\"><pre>\r\n"
"greetings from wolfSSL\r\n</pre></body></html>\r\n\r\n";
echoSz = (int)strlen(resp) + 1;
if (echoSz > (int)sizeof(command)) {
/* Internal error. */
err_sys("HTTP response greater than buffer.");
}
strncpy(command, resp, sizeof(command));
do {
err = 0; /* reset error */
ret = CyaSSL_write(write_ssl, command, echoSz);
if (ret <= 0) {
err = CyaSSL_get_error(write_ssl, 0);
#ifdef WOLFSSL_ASYNC_CRYPT
if (err == WC_PENDING_E) {
ret = wolfSSL_AsyncPoll(write_ssl, WOLF_POLL_FLAG_CHECK_HW);
if (ret < 0) break;
}
#endif
}
} while (err == WC_PENDING_E);
if (ret != echoSz) {
fprintf(stderr, "SSL_write get error = %d, %s\n", err,
CyaSSL_ERR_error_string(err, buffer));
err_sys("SSL_write get failed");
}
break;
}
command[echoSz] = 0;
#ifdef ECHO_OUT
LIBCALL_CHECK_RET(fputs(command, fout));
#endif
do {
err = 0; /* reset error */
ret = CyaSSL_write(write_ssl, command, echoSz);
if (ret <= 0) {
err = CyaSSL_get_error(write_ssl, 0);
#ifdef WOLFSSL_ASYNC_CRYPT
if (err == WC_PENDING_E) {
ret = wolfSSL_AsyncPoll(write_ssl, WOLF_POLL_FLAG_CHECK_HW);
if (ret < 0) break;
}
#endif
}
} while (err == WC_PENDING_E);
if (ret != echoSz) {
fprintf(stderr, "SSL_write echo error = %d, %s\n", err,
CyaSSL_ERR_error_string(err, buffer));
err_sys("SSL_write echo failed");
}
}
#ifndef CYASSL_DTLS
CyaSSL_shutdown(ssl);
#endif
#ifdef HAVE_WRITE_DUP
CyaSSL_free(write_ssl);
#endif
CyaSSL_free(ssl);
CloseSocket(clientfd);
#ifdef CYASSL_DTLS
tcp_listen(&sockfd, &port, useAnyAddr, doDTLS, 0);
SignalReady(args, port);
#endif
}
CloseSocket(sockfd);
CyaSSL_CTX_free(ctx);
#ifdef ECHO_OUT
if (outCreated)
fclose(fout);
#endif
((func_args*)args)->return_code = 0;
#if defined(NO_MAIN_DRIVER) && defined(HAVE_ECC) && defined(FP_ECC) \
&& defined(HAVE_THREAD_LS)
ecc_fp_free(); /* free per thread cache */
#endif
#ifdef CYASSL_TIRTOS
fdCloseSession(Task_self());
#endif
#ifdef HAVE_TEST_SESSION_TICKET
TicketCleanup();
#endif
#ifdef WOLFSSL_ASYNC_CRYPT
wolfAsync_DevClose(&devId);
#endif
#ifndef CYASSL_TIRTOS
return 0;
#endif
}
#endif /* !NO_WOLFSSL_SERVER */
/* so overall tests can pull in test function */
#ifndef NO_MAIN_DRIVER
int main(int argc, char** argv)
{
func_args args;
#ifdef HAVE_WNR
if (wc_InitNetRandom(wnrConfig, NULL, 5000) != 0)
err_sys("Whitewood netRandom global config failed");
#endif
StartTCP();
args.argc = argc;
args.argv = argv;
args.return_code = 0;
CyaSSL_Init();
#if defined(DEBUG_CYASSL) && !defined(CYASSL_MDK_SHELL)
CyaSSL_Debugging_ON();
#endif
ChangeToWolfRoot();
#ifndef NO_WOLFSSL_SERVER
echoserver_test(&args);
#endif
CyaSSL_Cleanup();
#ifdef HAVE_WNR
if (wc_FreeNetRandom() < 0)
err_sys("Failed to free netRandom context");
#endif /* HAVE_WNR */
return args.return_code;
}
#endif /* NO_MAIN_DRIVER */
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