mirror of
https://github.com/yuzu-emu/mbedtls.git
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3b0c430638
This is done to account for platforms, for which we want custom behavior upon the program termination, hence we call `mbedtls_exit()` instead of returning from `main()`. For the sake of consistency, introduces the modifications have been made to the test and utility examples as well. These, while less likely to be used in the low level environments, won't suffer from such a change.
425 lines
13 KiB
C
425 lines
13 KiB
C
/*
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* SSL server demonstration program using fork() for handling multiple clients
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#define mbedtls_fprintf fprintf
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#define mbedtls_printf printf
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#define mbedtls_time_t time_t
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#define mbedtls_exit exit
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#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
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#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
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#endif /* MBEDTLS_PLATFORM_C */
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#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_CERTS_C) || \
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!defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_SSL_TLS_C) || \
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!defined(MBEDTLS_SSL_SRV_C) || !defined(MBEDTLS_NET_C) || \
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!defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_CTR_DRBG_C) || \
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!defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_TIMING_C) || \
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!defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_PEM_PARSE_C)
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int main( int argc, char *argv[] )
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{
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((void) argc);
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((void) argv);
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mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_CERTS_C and/or MBEDTLS_ENTROPY_C "
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"and/or MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_SRV_C and/or "
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"MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
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"MBEDTLS_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C and/or "
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"MBEDTLS_TIMING_C and/or MBEDTLS_PEM_PARSE_C not defined.\n");
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mbedtls_exit( 0 );
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}
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#elif defined(_WIN32)
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int main( void )
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{
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mbedtls_printf("_WIN32 defined. This application requires fork() and signals "
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"to work correctly.\n");
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mbedtls_exit( 0 );
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}
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#else
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#include "mbedtls/entropy.h"
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#include "mbedtls/ctr_drbg.h"
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#include "mbedtls/certs.h"
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#include "mbedtls/x509.h"
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#include "mbedtls/ssl.h"
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#include "mbedtls/net_sockets.h"
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#include "mbedtls/timing.h"
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#include <string.h>
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#include <signal.h>
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#if !defined(_MSC_VER) || defined(EFIX64) || defined(EFI32)
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#include <unistd.h>
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#endif
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#define HTTP_RESPONSE \
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"HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
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"<h2>mbed TLS Test Server</h2>\r\n" \
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"<p>Successful connection using: %s</p>\r\n"
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#define DEBUG_LEVEL 0
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static void my_debug( void *ctx, int level,
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const char *file, int line,
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const char *str )
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{
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((void) level);
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mbedtls_fprintf( (FILE *) ctx, "%s:%04d: %s", file, line, str );
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fflush( (FILE *) ctx );
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}
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int main( void )
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{
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int ret = 1, len, cnt = 0, pid;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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mbedtls_net_context listen_fd, client_fd;
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unsigned char buf[1024];
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const char *pers = "ssl_fork_server";
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mbedtls_entropy_context entropy;
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mbedtls_ctr_drbg_context ctr_drbg;
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mbedtls_ssl_context ssl;
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mbedtls_ssl_config conf;
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mbedtls_x509_crt srvcert;
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mbedtls_pk_context pkey;
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mbedtls_net_init( &listen_fd );
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mbedtls_net_init( &client_fd );
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mbedtls_ssl_init( &ssl );
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mbedtls_ssl_config_init( &conf );
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mbedtls_entropy_init( &entropy );
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mbedtls_pk_init( &pkey );
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mbedtls_x509_crt_init( &srvcert );
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mbedtls_ctr_drbg_init( &ctr_drbg );
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signal( SIGCHLD, SIG_IGN );
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/*
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* 0. Initial seeding of the RNG
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*/
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mbedtls_printf( "\n . Initial seeding of the random generator..." );
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fflush( stdout );
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if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
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(const unsigned char *) pers,
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strlen( pers ) ) ) != 0 )
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{
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mbedtls_printf( " failed! mbedtls_ctr_drbg_seed returned %d\n\n", ret );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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/*
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* 1. Load the certificates and private RSA key
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*/
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mbedtls_printf( " . Loading the server cert. and key..." );
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fflush( stdout );
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/*
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* This demonstration program uses embedded test certificates.
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* Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
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* server and CA certificates, as well as mbedtls_pk_parse_keyfile().
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*/
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ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt,
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mbedtls_test_srv_crt_len );
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if( ret != 0 )
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{
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mbedtls_printf( " failed! mbedtls_x509_crt_parse returned %d\n\n", ret );
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goto exit;
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}
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ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_cas_pem,
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mbedtls_test_cas_pem_len );
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if( ret != 0 )
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{
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mbedtls_printf( " failed! mbedtls_x509_crt_parse returned %d\n\n", ret );
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goto exit;
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}
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ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
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mbedtls_test_srv_key_len, NULL, 0 );
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if( ret != 0 )
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{
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mbedtls_printf( " failed! mbedtls_pk_parse_key returned %d\n\n", ret );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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/*
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* 1b. Prepare SSL configuration
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*/
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mbedtls_printf( " . Configuring SSL..." );
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fflush( stdout );
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if( ( ret = mbedtls_ssl_config_defaults( &conf,
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MBEDTLS_SSL_IS_SERVER,
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MBEDTLS_SSL_TRANSPORT_STREAM,
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MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
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{
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mbedtls_printf( " failed! mbedtls_ssl_config_defaults returned %d\n\n", ret );
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goto exit;
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}
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mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
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mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
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mbedtls_ssl_conf_ca_chain( &conf, srvcert.next, NULL );
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if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
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{
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mbedtls_printf( " failed! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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/*
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* 2. Setup the listening TCP socket
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*/
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mbedtls_printf( " . Bind on https://localhost:4433/ ..." );
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fflush( stdout );
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if( ( ret = mbedtls_net_bind( &listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP ) ) != 0 )
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{
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mbedtls_printf( " failed! mbedtls_net_bind returned %d\n\n", ret );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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while( 1 )
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{
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/*
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* 3. Wait until a client connects
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*/
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mbedtls_net_init( &client_fd );
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mbedtls_ssl_init( &ssl );
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mbedtls_printf( " . Waiting for a remote connection ...\n" );
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fflush( stdout );
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if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
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NULL, 0, NULL ) ) != 0 )
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{
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mbedtls_printf( " failed! mbedtls_net_accept returned %d\n\n", ret );
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goto exit;
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}
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/*
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* 3.5. Forking server thread
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*/
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mbedtls_printf( " . Forking to handle connection ..." );
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fflush( stdout );
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pid = fork();
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if( pid < 0 )
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{
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mbedtls_printf(" failed! fork returned %d\n\n", pid );
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goto exit;
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}
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if( pid != 0 )
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{
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mbedtls_printf( " ok\n" );
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if( ( ret = mbedtls_ctr_drbg_reseed( &ctr_drbg,
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(const unsigned char *) "parent",
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6 ) ) != 0 )
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{
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mbedtls_printf( " failed! mbedtls_ctr_drbg_reseed returned %d\n\n", ret );
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goto exit;
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}
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continue;
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}
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mbedtls_net_init( &listen_fd );
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pid = getpid();
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/*
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* 4. Setup stuff
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*/
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mbedtls_printf( "pid %d: Setting up the SSL data.\n", pid );
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fflush( stdout );
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if( ( ret = mbedtls_ctr_drbg_reseed( &ctr_drbg,
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(const unsigned char *) "child",
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5 ) ) != 0 )
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{
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mbedtls_printf(
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"pid %d: SSL setup failed! mbedtls_ctr_drbg_reseed returned %d\n\n",
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pid, ret );
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goto exit;
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}
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if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
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{
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mbedtls_printf(
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"pid %d: SSL setup failed! mbedtls_ssl_setup returned %d\n\n",
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pid, ret );
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goto exit;
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}
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mbedtls_ssl_set_bio( &ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
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mbedtls_printf( "pid %d: SSL setup ok\n", pid );
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/*
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* 5. Handshake
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*/
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mbedtls_printf( "pid %d: Performing the SSL/TLS handshake.\n", pid );
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fflush( stdout );
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while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
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{
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if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
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{
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mbedtls_printf(
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"pid %d: SSL handshake failed! mbedtls_ssl_handshake returned %d\n\n",
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pid, ret );
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goto exit;
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}
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}
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mbedtls_printf( "pid %d: SSL handshake ok\n", pid );
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/*
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* 6. Read the HTTP Request
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*/
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mbedtls_printf( "pid %d: Start reading from client.\n", pid );
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fflush( stdout );
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do
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{
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len = sizeof( buf ) - 1;
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memset( buf, 0, sizeof( buf ) );
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ret = mbedtls_ssl_read( &ssl, buf, len );
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if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
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continue;
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if( ret <= 0 )
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{
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switch( ret )
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{
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case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
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mbedtls_printf( "pid %d: connection was closed gracefully\n", pid );
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break;
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case MBEDTLS_ERR_NET_CONN_RESET:
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mbedtls_printf( "pid %d: connection was reset by peer\n", pid );
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break;
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default:
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mbedtls_printf( "pid %d: mbedtls_ssl_read returned %d\n", pid, ret );
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break;
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}
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break;
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}
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len = ret;
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mbedtls_printf( "pid %d: %d bytes read\n\n%s", pid, len, (char *) buf );
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if( ret > 0 )
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break;
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}
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while( 1 );
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/*
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* 7. Write the 200 Response
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*/
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mbedtls_printf( "pid %d: Start writing to client.\n", pid );
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fflush( stdout );
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len = sprintf( (char *) buf, HTTP_RESPONSE,
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mbedtls_ssl_get_ciphersuite( &ssl ) );
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while( cnt++ < 100 )
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{
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while( ( ret = mbedtls_ssl_write( &ssl, buf, len ) ) <= 0 )
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{
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if( ret == MBEDTLS_ERR_NET_CONN_RESET )
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{
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mbedtls_printf(
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"pid %d: Write failed! peer closed the connection\n\n", pid );
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goto exit;
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}
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if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
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{
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mbedtls_printf(
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"pid %d: Write failed! mbedtls_ssl_write returned %d\n\n",
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pid, ret );
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goto exit;
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}
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}
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len = ret;
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mbedtls_printf( "pid %d: %d bytes written\n\n%s\n", pid, len, (char *) buf );
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mbedtls_net_usleep( 1000000 );
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}
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mbedtls_ssl_close_notify( &ssl );
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goto exit;
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}
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exit_code = MBEDTLS_EXIT_SUCCESS;
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exit:
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mbedtls_net_free( &client_fd );
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mbedtls_net_free( &listen_fd );
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mbedtls_x509_crt_free( &srvcert );
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mbedtls_pk_free( &pkey );
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mbedtls_ssl_free( &ssl );
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mbedtls_ssl_config_free( &conf );
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mbedtls_ctr_drbg_free( &ctr_drbg );
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mbedtls_entropy_free( &entropy );
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#if defined(_WIN32)
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mbedtls_printf( " Press Enter to exit this program.\n" );
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fflush( stdout ); getchar();
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#endif
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mbedtls_exit( exit_code );
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}
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#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_CERTS_C && MBEDTLS_ENTROPY_C &&
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MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C &&
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MBEDTLS_RSA_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_PEM_PARSE_C &&
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! _WIN32 */
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