464 lines
14 KiB
C
464 lines
14 KiB
C
/*
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* Certificate reading application
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "polarssl/config.h"
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "polarssl/entropy.h"
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#include "polarssl/ctr_drbg.h"
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#include "polarssl/net.h"
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#include "polarssl/ssl.h"
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#include "polarssl/x509.h"
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#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_ENTROPY_C) || \
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!defined(POLARSSL_SSL_TLS_C) || !defined(POLARSSL_SSL_CLI_C) || \
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!defined(POLARSSL_NET_C) || !defined(POLARSSL_RSA_C) || \
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!defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_FS_IO) || \
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!defined(POLARSSL_CTR_DRBG_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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printf("POLARSSL_BIGNUM_C and/or POLARSSL_ENTROPY_C and/or "
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"POLARSSL_SSL_TLS_C and/or POLARSSL_SSL_CLI_C and/or "
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"POLARSSL_NET_C and/or POLARSSL_RSA_C and/or "
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"POLARSSL_X509_CRT_PARSE_C and/or POLARSSL_FS_IO and/or "
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"POLARSSL_CTR_DRBG_C not defined.\n");
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return( 0 );
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}
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#else
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#define MODE_NONE 0
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#define MODE_FILE 1
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#define MODE_SSL 2
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#define DFL_MODE MODE_NONE
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#define DFL_FILENAME "cert.crt"
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#define DFL_CA_FILE ""
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#define DFL_CA_PATH ""
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#define DFL_SERVER_NAME "localhost"
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#define DFL_SERVER_PORT 4433
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#define DFL_DEBUG_LEVEL 0
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#define DFL_PERMISSIVE 0
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/*
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* global options
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*/
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struct options
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{
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int mode; /* the mode to run the application in */
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const char *filename; /* filename of the certificate file */
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const char *ca_file; /* the file with the CA certificate(s) */
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const char *ca_path; /* the path with the CA certificate(s) reside */
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const char *server_name; /* hostname of the server (client only) */
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int server_port; /* port on which the ssl service runs */
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int debug_level; /* level of debugging */
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int permissive; /* permissive parsing */
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} opt;
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static void my_debug( void *ctx, int level, const char *str )
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{
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if( level < opt.debug_level )
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{
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fprintf( (FILE *) ctx, "%s", str );
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fflush( (FILE *) ctx );
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}
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}
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static int my_verify( void *data, x509_crt *crt, int depth, int *flags )
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{
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char buf[1024];
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((void) data);
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printf( "\nVerify requested for (Depth %d):\n", depth );
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x509_crt_info( buf, sizeof( buf ) - 1, "", crt );
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printf( "%s", buf );
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if( ( (*flags) & BADCERT_EXPIRED ) != 0 )
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printf( " ! server certificate has expired\n" );
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if( ( (*flags) & BADCERT_REVOKED ) != 0 )
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printf( " ! server certificate has been revoked\n" );
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if( ( (*flags) & BADCERT_CN_MISMATCH ) != 0 )
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printf( " ! CN mismatch\n" );
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if( ( (*flags) & BADCERT_NOT_TRUSTED ) != 0 )
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printf( " ! self-signed or not signed by a trusted CA\n" );
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if( ( (*flags) & BADCRL_NOT_TRUSTED ) != 0 )
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printf( " ! CRL not trusted\n" );
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if( ( (*flags) & BADCRL_EXPIRED ) != 0 )
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printf( " ! CRL expired\n" );
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if( ( (*flags) & BADCERT_OTHER ) != 0 )
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printf( " ! other (unknown) flag\n" );
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if ( ( *flags ) == 0 )
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printf( " This certificate has no flags\n" );
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return( 0 );
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}
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#define USAGE_IO \
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" ca_file=%%s The single file containing the top-level CA(s) you fully trust\n" \
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" default: \"\" (none)\n" \
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" ca_path=%%s The path containing the top-level CA(s) you fully trust\n" \
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" default: \"\" (none) (overrides ca_file)\n"
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#define USAGE \
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"\n usage: cert_app param=<>...\n" \
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"\n acceptable parameters:\n" \
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" mode=file|ssl default: none\n" \
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" filename=%%s default: cert.crt\n" \
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USAGE_IO \
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" server_name=%%s default: localhost\n" \
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" server_port=%%d default: 4433\n" \
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" debug_level=%%d default: 0 (disabled)\n" \
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" permissive=%%d default: 0 (disabled)\n" \
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"\n"
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int main( int argc, char *argv[] )
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{
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int ret = 0, server_fd;
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unsigned char buf[1024];
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entropy_context entropy;
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ctr_drbg_context ctr_drbg;
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ssl_context ssl;
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x509_crt cacert;
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x509_crt clicert;
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pk_context pkey;
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int i, j;
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int flags, verify = 0;
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char *p, *q;
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const char *pers = "cert_app";
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/*
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* Set to sane values
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*/
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server_fd = 0;
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x509_crt_init( &cacert );
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x509_crt_init( &clicert );
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pk_init( &pkey );
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if( argc == 0 )
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{
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usage:
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printf( USAGE );
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goto exit;
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}
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opt.mode = DFL_MODE;
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opt.filename = DFL_FILENAME;
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opt.ca_file = DFL_CA_FILE;
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opt.ca_path = DFL_CA_PATH;
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opt.server_name = DFL_SERVER_NAME;
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opt.server_port = DFL_SERVER_PORT;
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opt.debug_level = DFL_DEBUG_LEVEL;
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opt.permissive = DFL_PERMISSIVE;
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for( i = 1; i < argc; i++ )
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{
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p = argv[i];
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if( ( q = strchr( p, '=' ) ) == NULL )
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goto usage;
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*q++ = '\0';
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for( j = 0; p + j < q; j++ )
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{
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if( argv[i][j] >= 'A' && argv[i][j] <= 'Z' )
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argv[i][j] |= 0x20;
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}
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if( strcmp( p, "mode" ) == 0 )
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{
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if( strcmp( q, "file" ) == 0 )
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opt.mode = MODE_FILE;
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else if( strcmp( q, "ssl" ) == 0 )
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opt.mode = MODE_SSL;
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else
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goto usage;
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}
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else if( strcmp( p, "filename" ) == 0 )
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opt.filename = q;
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else if( strcmp( p, "ca_file" ) == 0 )
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opt.ca_file = q;
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else if( strcmp( p, "ca_path" ) == 0 )
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opt.ca_path = q;
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else if( strcmp( p, "server_name" ) == 0 )
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opt.server_name = q;
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else if( strcmp( p, "server_port" ) == 0 )
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{
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opt.server_port = atoi( q );
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if( opt.server_port < 1 || opt.server_port > 65535 )
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goto usage;
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}
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else if( strcmp( p, "debug_level" ) == 0 )
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{
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opt.debug_level = atoi( q );
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if( opt.debug_level < 0 || opt.debug_level > 65535 )
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goto usage;
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}
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else if( strcmp( p, "permissive" ) == 0 )
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{
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opt.permissive = atoi( q );
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if( opt.permissive < 0 || opt.permissive > 1 )
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goto usage;
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}
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else
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goto usage;
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}
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/*
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* 1.1. Load the trusted CA
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*/
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printf( " . Loading the CA root certificate ..." );
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fflush( stdout );
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if( strlen( opt.ca_path ) )
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{
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ret = x509_crt_parse_path( &cacert, opt.ca_path );
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verify = 1;
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}
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else if( strlen( opt.ca_file ) )
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{
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ret = x509_crt_parse_file( &cacert, opt.ca_file );
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verify = 1;
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}
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if( ret < 0 )
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{
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printf( " failed\n ! x509_crt_parse returned -0x%x\n\n", -ret );
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goto exit;
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}
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printf( " ok (%d skipped)\n", ret );
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if( opt.mode == MODE_FILE )
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{
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x509_crt crt;
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x509_crt *cur = &crt;
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x509_crt_init( &crt );
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/*
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* 1.1. Load the certificate(s)
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*/
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printf( "\n . Loading the certificate(s) ..." );
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fflush( stdout );
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ret = x509_crt_parse_file( &crt, opt.filename );
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if( ret < 0 )
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{
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printf( " failed\n ! x509_crt_parse_file returned %d\n\n", ret );
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x509_crt_free( &crt );
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goto exit;
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}
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if( opt.permissive == 0 && ret > 0 )
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{
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printf( " failed\n ! x509_crt_parse failed to parse %d certificates\n\n", ret );
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x509_crt_free( &crt );
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goto exit;
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}
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printf( " ok\n" );
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/*
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* 1.2 Print the certificate(s)
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*/
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while( cur != NULL )
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{
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printf( " . Peer certificate information ...\n" );
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ret = x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
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cur );
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if( ret == -1 )
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{
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printf( " failed\n ! x509_crt_info returned %d\n\n", ret );
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x509_crt_free( &crt );
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goto exit;
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}
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printf( "%s\n", buf );
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cur = cur->next;
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}
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/*
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* 1.3 Verify the certificate
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*/
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if( verify )
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{
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printf( " . Verifying X.509 certificate..." );
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if( ( ret = x509_crt_verify( &crt, &cacert, NULL, NULL, &flags,
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my_verify, NULL ) ) != 0 )
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{
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printf( " failed\n" );
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if( ( ret & BADCERT_EXPIRED ) != 0 )
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printf( " ! server certificate has expired\n" );
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if( ( ret & BADCERT_REVOKED ) != 0 )
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printf( " ! server certificate has been revoked\n" );
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if( ( ret & BADCERT_CN_MISMATCH ) != 0 )
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printf( " ! CN mismatch (expected CN=%s)\n", opt.server_name );
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if( ( ret & BADCERT_NOT_TRUSTED ) != 0 )
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printf( " ! self-signed or not signed by a trusted CA\n" );
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printf( "\n" );
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}
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else
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printf( " ok\n" );
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}
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x509_crt_free( &crt );
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}
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else if( opt.mode == MODE_SSL )
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{
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/*
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* 1. Initialize the RNG and the session data
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*/
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printf( "\n . Seeding the random number generator..." );
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fflush( stdout );
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entropy_init( &entropy );
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if( ( ret = ctr_drbg_init( &ctr_drbg, 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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printf( " failed\n ! ctr_drbg_init returned %d\n", ret );
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goto exit;
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}
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printf( " ok\n" );
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/*
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* 2. Start the connection
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*/
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printf( " . SSL connection to tcp/%s/%-4d...", opt.server_name,
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opt.server_port );
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fflush( stdout );
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if( ( ret = net_connect( &server_fd, opt.server_name,
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opt.server_port ) ) != 0 )
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{
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printf( " failed\n ! net_connect returned %d\n\n", ret );
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goto exit;
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}
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/*
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* 3. Setup stuff
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*/
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if( ( ret = ssl_init( &ssl ) ) != 0 )
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{
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printf( " failed\n ! ssl_init returned %d\n\n", ret );
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goto exit;
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}
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ssl_set_endpoint( &ssl, SSL_IS_CLIENT );
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if( verify )
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{
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ssl_set_authmode( &ssl, SSL_VERIFY_REQUIRED );
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ssl_set_ca_chain( &ssl, &cacert, NULL, opt.server_name );
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ssl_set_verify( &ssl, my_verify, NULL );
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}
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else
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ssl_set_authmode( &ssl, SSL_VERIFY_NONE );
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ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg );
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ssl_set_dbg( &ssl, my_debug, stdout );
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ssl_set_bio( &ssl, net_recv, &server_fd,
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net_send, &server_fd );
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ssl_set_own_cert( &ssl, &clicert, &pkey );
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#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
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ssl_set_hostname( &ssl, opt.server_name );
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#endif
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/*
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* 4. Handshake
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*/
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while( ( ret = ssl_handshake( &ssl ) ) != 0 )
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{
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if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
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{
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printf( " failed\n ! ssl_handshake returned %d\n\n", ret );
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ssl_free( &ssl );
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goto exit;
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}
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}
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printf( " ok\n" );
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/*
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* 5. Print the certificate
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*/
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printf( " . Peer certificate information ...\n" );
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ret = x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
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ssl.session->peer_cert );
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if( ret == -1 )
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{
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printf( " failed\n ! x509_crt_info returned %d\n\n", ret );
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ssl_free( &ssl );
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goto exit;
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}
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printf( "%s\n", buf );
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ssl_close_notify( &ssl );
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ssl_free( &ssl );
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}
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else
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goto usage;
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exit:
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if( server_fd )
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net_close( server_fd );
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x509_crt_free( &cacert );
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x509_crt_free( &clicert );
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pk_free( &pkey );
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entropy_free( &entropy );
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#if defined(_WIN32)
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printf( " + Press Enter to exit this program.\n" );
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fflush( stdout ); getchar();
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#endif
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return( ret );
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}
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#endif /* POLARSSL_BIGNUM_C && POLARSSL_ENTROPY_C && POLARSSL_SSL_TLS_C &&
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POLARSSL_SSL_CLI_C && POLARSSL_NET_C && POLARSSL_RSA_C &&
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POLARSSL_X509_CRT_PARSE_C && POLARSSL_FS_IO && POLARSSL_CTR_DRBG_C */
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