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/*
* Certificate reading application
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file is part of mbed TLS (https://tls.mbed.org)
*/
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdio.h>
#include <stdlib.h>
#define mbedtls_time time
#define mbedtls_time_t time_t
#define mbedtls_fprintf fprintf
#define mbedtls_printf printf
#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
#endif /* MBEDTLS_PLATFORM_C */
#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \
!defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \
!defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) || \
!defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
!defined(MBEDTLS_CTR_DRBG_C)
int main( void )
{
mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
"MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_CLI_C and/or "
"MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
"MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_FS_IO and/or "
"MBEDTLS_CTR_DRBG_C not defined.\n");
return( 0 );
}
#else
#include "mbedtls/entropy.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/net_sockets.h"
#include "mbedtls/ssl.h"
#include "mbedtls/x509.h"
#include "mbedtls/debug.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MODE_NONE 0
#define MODE_FILE 1
#define MODE_SSL 2
#define DFL_MODE MODE_NONE
#define DFL_FILENAME "cert.crt"
#define DFL_CA_FILE ""
#define DFL_CRL_FILE ""
#define DFL_CA_PATH ""
#define DFL_SERVER_NAME "localhost"
#define DFL_SERVER_PORT "4433"
#define DFL_DEBUG_LEVEL 0
#define DFL_PERMISSIVE 0
#define USAGE_IO \
" ca_file=%%s The single file containing the top-level CA(s) you fully trust\n" \
" default: \"\" (none)\n" \
" crl_file=%%s The single CRL file you want to use\n" \
" default: \"\" (none)\n" \
" ca_path=%%s The path containing the top-level CA(s) you fully trust\n" \
" default: \"\" (none) (overrides ca_file)\n"
#define USAGE \
"\n usage: cert_app param=<>...\n" \
"\n acceptable parameters:\n" \
" mode=file|ssl default: none\n" \
" filename=%%s default: cert.crt\n" \
USAGE_IO \
" server_name=%%s default: localhost\n" \
" server_port=%%d default: 4433\n" \
" debug_level=%%d default: 0 (disabled)\n" \
" permissive=%%d default: 0 (disabled)\n" \
"\n"
/*
* global options
*/
struct options
{
int mode; /* the mode to run the application in */
const char *filename; /* filename of the certificate file */
const char *ca_file; /* the file with the CA certificate(s) */
const char *crl_file; /* the file with the CRL to use */
const char *ca_path; /* the path with the CA certificate(s) reside */
const char *server_name; /* hostname of the server (client only) */
const char *server_port; /* port on which the ssl service runs */
int debug_level; /* level of debugging */
int permissive; /* permissive parsing */
} opt;
static void my_debug( void *ctx, int level,
const char *file, int line,
const char *str )
{
((void) level);
mbedtls_fprintf( (FILE *) ctx, "%s:%04d: %s", file, line, str );
fflush( (FILE *) ctx );
}
static int my_verify( void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags )
{
char buf[1024];
((void) data);
mbedtls_printf( "\nVerify requested for (Depth %d):\n", depth );
mbedtls_x509_crt_info( buf, sizeof( buf ) - 1, "", crt );
mbedtls_printf( "%s", buf );
if ( ( *flags ) == 0 )
mbedtls_printf( " This certificate has no flags\n" );
else
{
mbedtls_x509_crt_verify_info( buf, sizeof( buf ), " ! ", *flags );
mbedtls_printf( "%s\n", buf );
}
return( 0 );
}
int main( int argc, char *argv[] )
{
int ret = 1;
int exit_code = MBEDTLS_EXIT_FAILURE;
mbedtls_net_context server_fd;
unsigned char buf[1024];
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
mbedtls_x509_crt cacert;
mbedtls_x509_crl cacrl;
int i, j;
uint32_t flags;
int verify = 0;
char *p, *q;
const char *pers = "cert_app";
/*
* Set to sane values
*/
mbedtls_net_init( &server_fd );
mbedtls_ctr_drbg_init( &ctr_drbg );
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
mbedtls_x509_crt_init( &cacert );
#if defined(MBEDTLS_X509_CRL_PARSE_C)
mbedtls_x509_crl_init( &cacrl );
#else
/* Zeroize structure as CRL parsing is not supported and we have to pass
it to the verify function */
memset( &cacrl, 0, sizeof(mbedtls_x509_crl) );
#endif
if( argc == 0 )
{
usage:
mbedtls_printf( USAGE );
goto exit;
}
opt.mode = DFL_MODE;
opt.filename = DFL_FILENAME;
opt.ca_file = DFL_CA_FILE;
opt.crl_file = DFL_CRL_FILE;
opt.ca_path = DFL_CA_PATH;
opt.server_name = DFL_SERVER_NAME;
opt.server_port = DFL_SERVER_PORT;
opt.debug_level = DFL_DEBUG_LEVEL;
opt.permissive = DFL_PERMISSIVE;
for( i = 1; i < argc; i++ )
{
p = argv[i];
if( ( q = strchr( p, '=' ) ) == NULL )
goto usage;
*q++ = '\0';
for( j = 0; p + j < q; j++ )
{
if( argv[i][j] >= 'A' && argv[i][j] <= 'Z' )
argv[i][j] |= 0x20;
}
if( strcmp( p, "mode" ) == 0 )
{
if( strcmp( q, "file" ) == 0 )
opt.mode = MODE_FILE;
else if( strcmp( q, "ssl" ) == 0 )
opt.mode = MODE_SSL;
else
goto usage;
}
else if( strcmp( p, "filename" ) == 0 )
opt.filename = q;
else if( strcmp( p, "ca_file" ) == 0 )
opt.ca_file = q;
else if( strcmp( p, "crl_file" ) == 0 )
opt.crl_file = q;
else if( strcmp( p, "ca_path" ) == 0 )
opt.ca_path = q;
else if( strcmp( p, "server_name" ) == 0 )
opt.server_name = q;
else if( strcmp( p, "server_port" ) == 0 )
opt.server_port = q;
else if( strcmp( p, "debug_level" ) == 0 )
{
opt.debug_level = atoi( q );
if( opt.debug_level < 0 || opt.debug_level > 65535 )
goto usage;
}
else if( strcmp( p, "permissive" ) == 0 )
{
opt.permissive = atoi( q );
if( opt.permissive < 0 || opt.permissive > 1 )
goto usage;
}
else
goto usage;
}
/*
* 1.1. Load the trusted CA
*/
mbedtls_printf( " . Loading the CA root certificate ..." );
fflush( stdout );
if( strlen( opt.ca_path ) )
{
if( ( ret = mbedtls_x509_crt_parse_path( &cacert, opt.ca_path ) ) < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse_path returned -0x%x\n\n", -ret );
goto exit;
}
verify = 1;
}
else if( strlen( opt.ca_file ) )
{
if( ( ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file ) ) < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse_file returned -0x%x\n\n", -ret );
goto exit;
}
verify = 1;
}
mbedtls_printf( " ok (%d skipped)\n", ret );
#if defined(MBEDTLS_X509_CRL_PARSE_C)
if( strlen( opt.crl_file ) )
{
if( ( ret = mbedtls_x509_crl_parse_file( &cacrl, opt.crl_file ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crl_parse returned -0x%x\n\n", -ret );
goto exit;
}
verify = 1;
}
#endif
if( opt.mode == MODE_FILE )
{
mbedtls_x509_crt crt;
mbedtls_x509_crt *cur = &crt;
mbedtls_x509_crt_init( &crt );
/*
* 1.1. Load the certificate(s)
*/
mbedtls_printf( "\n . Loading the certificate(s) ..." );
fflush( stdout );
ret = mbedtls_x509_crt_parse_file( &crt, opt.filename );
if( ret < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse_file returned %d\n\n", ret );
mbedtls_x509_crt_free( &crt );
goto exit;
}
if( opt.permissive == 0 && ret > 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse failed to parse %d certificates\n\n", ret );
mbedtls_x509_crt_free( &crt );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1.2 Print the certificate(s)
*/
while( cur != NULL )
{
mbedtls_printf( " . Peer certificate information ...\n" );
ret = mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
cur );
if( ret == -1 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_info returned %d\n\n", ret );
mbedtls_x509_crt_free( &crt );
goto exit;
}
mbedtls_printf( "%s\n", buf );
cur = cur->next;
}
/*
* 1.3 Verify the certificate
*/
if( verify )
{
mbedtls_printf( " . Verifying X.509 certificate..." );
if( ( ret = mbedtls_x509_crt_verify( &crt, &cacert, &cacrl, NULL, &flags,
my_verify, NULL ) ) != 0 )
{
char vrfy_buf[512];
mbedtls_printf( " failed\n" );
mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
mbedtls_printf( "%s\n", vrfy_buf );
}
else
mbedtls_printf( " ok\n" );
}
mbedtls_x509_crt_free( &crt );
}
else if( opt.mode == MODE_SSL )
{
/*
* 1. Initialize the RNG and the session data
*/
mbedtls_printf( "\n . Seeding the random number generator..." );
fflush( stdout );
mbedtls_entropy_init( &entropy );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
goto ssl_exit;
}
mbedtls_printf( " ok\n" );
#if defined(MBEDTLS_DEBUG_C)
mbedtls_debug_set_threshold( opt.debug_level );
#endif
/*
* 2. Start the connection
*/
mbedtls_printf( " . SSL connection to tcp/%s/%s...", opt.server_name,
opt.server_port );
fflush( stdout );
if( ( ret = mbedtls_net_connect( &server_fd, opt.server_name,
opt.server_port, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_connect returned %d\n\n", ret );
goto ssl_exit;
}
/*
* 3. Setup stuff
*/
if( ( ret = mbedtls_ssl_config_defaults( &conf,
MBEDTLS_SSL_IS_CLIENT,
MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
goto exit;
}
if( verify )
{
mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_REQUIRED );
mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
mbedtls_ssl_conf_verify( &conf, my_verify, NULL );
}
else
mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_NONE );
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
goto ssl_exit;
}
if( ( ret = mbedtls_ssl_set_hostname( &ssl, opt.server_name ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
goto ssl_exit;
}
mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
/*
* 4. Handshake
*/
while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret );
goto ssl_exit;
}
}
mbedtls_printf( " ok\n" );
/*
* 5. Print the certificate
*/
mbedtls_printf( " . Peer certificate information ...\n" );
ret = mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
ssl.session->peer_cert );
if( ret == -1 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_info returned %d\n\n", ret );
goto ssl_exit;
}
mbedtls_printf( "%s\n", buf );
mbedtls_ssl_close_notify( &ssl );
ssl_exit:
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
}
else
goto usage;
exit_code = MBEDTLS_EXIT_SUCCESS;
exit:
mbedtls_net_free( &server_fd );
mbedtls_x509_crt_free( &cacert );
#if defined(MBEDTLS_X509_CRL_PARSE_C)
mbedtls_x509_crl_free( &cacrl );
#endif
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( exit_code );
}
#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C &&
MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C &&
MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */