855 lines
25 KiB
C
Executable File
855 lines
25 KiB
C
Executable File
/*
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* SSL client for SMTP servers
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: GPL-2.0
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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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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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/* Enable definition of gethostname() even when compiling with -std=c99. Must
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* be set before config.h, which pulls in glibc's features.h indirectly.
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* Harmless on other platforms. */
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#define _POSIX_C_SOURCE 200112L
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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_time time
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#define mbedtls_time_t time_t
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#define mbedtls_fprintf fprintf
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#define mbedtls_printf printf
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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_ENTROPY_C) || \
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!defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \
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!defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) || \
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!defined(MBEDTLS_CTR_DRBG_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \
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!defined(MBEDTLS_FS_IO)
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int main( void )
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{
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mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
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"MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_CLI_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 "
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"not defined.\n");
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return( 0 );
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}
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#else
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#include "mbedtls/base64.h"
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#include "mbedtls/error.h"
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#include "mbedtls/net_sockets.h"
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#include "mbedtls/ssl.h"
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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 <stdlib.h>
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#include <string.h>
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#if !defined(_MSC_VER) || defined(EFIX64) || defined(EFI32)
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#include <unistd.h>
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#else
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#include <io.h>
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#endif
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#if defined(_WIN32) || defined(_WIN32_WCE)
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#include <winsock2.h>
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#include <windows.h>
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#if defined(_MSC_VER)
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#if defined(_WIN32_WCE)
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#pragma comment( lib, "ws2.lib" )
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#else
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#pragma comment( lib, "ws2_32.lib" )
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#endif
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#endif /* _MSC_VER */
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#endif
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#define DFL_SERVER_NAME "localhost"
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#define DFL_SERVER_PORT "465"
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#define DFL_USER_NAME "user"
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#define DFL_USER_PWD "password"
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#define DFL_MAIL_FROM ""
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#define DFL_MAIL_TO ""
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#define DFL_DEBUG_LEVEL 0
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#define DFL_CA_FILE ""
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#define DFL_CRT_FILE ""
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#define DFL_KEY_FILE ""
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#define DFL_FORCE_CIPHER 0
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#define DFL_MODE 0
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#define DFL_AUTHENTICATION 0
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#define MODE_SSL_TLS 0
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#define MODE_STARTTLS 0
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#if defined(MBEDTLS_BASE64_C)
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#define USAGE_AUTH \
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" authentication=%%d default: 0 (disabled)\n" \
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" user_name=%%s default: \"user\"\n" \
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" user_pwd=%%s default: \"password\"\n"
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#else
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#define USAGE_AUTH \
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" authentication options disabled. (Require MBEDTLS_BASE64_C)\n"
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#endif /* MBEDTLS_BASE64_C */
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#if defined(MBEDTLS_FS_IO)
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#define USAGE_IO \
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" ca_file=%%s default: \"\" (pre-loaded)\n" \
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" crt_file=%%s default: \"\" (pre-loaded)\n" \
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" key_file=%%s default: \"\" (pre-loaded)\n"
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#else
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#define USAGE_IO \
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" No file operations available (MBEDTLS_FS_IO not defined)\n"
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#endif /* MBEDTLS_FS_IO */
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#define USAGE \
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"\n usage: ssl_mail_client param=<>...\n" \
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"\n acceptable parameters:\n" \
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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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" mode=%%d default: 0 (SSL/TLS) (1 for STARTTLS)\n" \
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USAGE_AUTH \
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" mail_from=%%s default: \"\"\n" \
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" mail_to=%%s default: \"\"\n" \
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USAGE_IO \
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" force_ciphersuite=<name> default: all enabled\n"\
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" acceptable ciphersuite names:\n"
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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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const char *server_name; /* hostname of the server (client only) */
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const char *server_port; /* port on which the ssl service runs */
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int debug_level; /* level of debugging */
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int authentication; /* if authentication is required */
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int mode; /* SSL/TLS (0) or STARTTLS (1) */
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const char *user_name; /* username to use for authentication */
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const char *user_pwd; /* password to use for authentication */
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const char *mail_from; /* E-Mail address to use as sender */
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const char *mail_to; /* E-Mail address to use as recipient */
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const char *ca_file; /* the file with the CA certificate(s) */
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const char *crt_file; /* the file with the client certificate */
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const char *key_file; /* the file with the client key */
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int force_ciphersuite[2]; /* protocol/ciphersuite to use, or all */
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} opt;
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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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static int do_handshake( mbedtls_ssl_context *ssl )
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{
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int ret;
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uint32_t flags;
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unsigned char buf[1024];
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memset(buf, 0, 1024);
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/*
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* 4. Handshake
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*/
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mbedtls_printf( " . Performing the SSL/TLS handshake..." );
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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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#if defined(MBEDTLS_ERROR_C)
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mbedtls_strerror( ret, (char *) buf, 1024 );
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#endif
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mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned %d: %s\n\n", ret, buf );
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return( -1 );
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}
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}
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mbedtls_printf( " ok\n [ Ciphersuite is %s ]\n",
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mbedtls_ssl_get_ciphersuite( ssl ) );
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/*
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* 5. Verify the server certificate
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*/
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mbedtls_printf( " . Verifying peer X.509 certificate..." );
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/* In real life, we probably want to bail out when ret != 0 */
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if( ( flags = mbedtls_ssl_get_verify_result( ssl ) ) != 0 )
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{
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char vrfy_buf[512];
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mbedtls_printf( " failed\n" );
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mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
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mbedtls_printf( "%s\n", vrfy_buf );
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}
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else
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mbedtls_printf( " ok\n" );
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mbedtls_printf( " . Peer certificate information ...\n" );
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mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
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mbedtls_ssl_get_peer_cert( ssl ) );
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mbedtls_printf( "%s\n", buf );
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return( 0 );
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}
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static int write_ssl_data( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
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{
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int ret;
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mbedtls_printf("\n%s", buf);
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while( len && ( ret = mbedtls_ssl_write( ssl, buf, len ) ) <= 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( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
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return -1;
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}
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}
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return( 0 );
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}
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static int write_ssl_and_get_response( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
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{
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int ret;
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unsigned char data[128];
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char code[4];
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size_t i, idx = 0;
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mbedtls_printf("\n%s", buf);
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while( len && ( ret = mbedtls_ssl_write( ssl, buf, len ) ) <= 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( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
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return -1;
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}
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}
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do
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{
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len = sizeof( data ) - 1;
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memset( data, 0, sizeof( data ) );
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ret = mbedtls_ssl_read( ssl, data, 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 == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY )
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return -1;
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if( ret <= 0 )
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{
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mbedtls_printf( "failed\n ! mbedtls_ssl_read returned %d\n\n", ret );
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return -1;
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}
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mbedtls_printf("\n%s", data);
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len = ret;
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for( i = 0; i < len; i++ )
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{
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if( data[i] != '\n' )
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{
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if( idx < 4 )
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code[ idx++ ] = data[i];
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continue;
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}
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if( idx == 4 && code[0] >= '0' && code[0] <= '9' && code[3] == ' ' )
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{
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code[3] = '\0';
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return atoi( code );
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}
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idx = 0;
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}
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}
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while( 1 );
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}
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static int write_and_get_response( mbedtls_net_context *sock_fd, unsigned char *buf, size_t len )
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{
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int ret;
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unsigned char data[128];
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char code[4];
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size_t i, idx = 0;
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mbedtls_printf("\n%s", buf);
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if( len && ( ret = mbedtls_net_send( sock_fd, buf, len ) ) <= 0 )
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{
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mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
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return -1;
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}
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do
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{
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len = sizeof( data ) - 1;
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memset( data, 0, sizeof( data ) );
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ret = mbedtls_net_recv( sock_fd, data, len );
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if( ret <= 0 )
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{
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mbedtls_printf( "failed\n ! read returned %d\n\n", ret );
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return -1;
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}
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data[len] = '\0';
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mbedtls_printf("\n%s", data);
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len = ret;
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for( i = 0; i < len; i++ )
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{
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if( data[i] != '\n' )
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{
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if( idx < 4 )
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code[ idx++ ] = data[i];
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continue;
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}
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if( idx == 4 && code[0] >= '0' && code[0] <= '9' && code[3] == ' ' )
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{
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code[3] = '\0';
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return atoi( code );
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}
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idx = 0;
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}
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}
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while( 1 );
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}
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int main( int argc, char *argv[] )
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{
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int ret = 1, len;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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mbedtls_net_context server_fd;
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unsigned char buf[1024];
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#if defined(MBEDTLS_BASE64_C)
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unsigned char base[1024];
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#endif
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char hostname[32];
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const char *pers = "ssl_mail_client";
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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 cacert;
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mbedtls_x509_crt clicert;
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mbedtls_pk_context pkey;
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int i;
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size_t n;
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char *p, *q;
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const int *list;
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/*
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* Make sure memory references are valid in case we exit early.
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*/
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mbedtls_net_init( &server_fd );
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mbedtls_ssl_init( &ssl );
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mbedtls_ssl_config_init( &conf );
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memset( &buf, 0, sizeof( buf ) );
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mbedtls_x509_crt_init( &cacert );
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mbedtls_x509_crt_init( &clicert );
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mbedtls_pk_init( &pkey );
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mbedtls_ctr_drbg_init( &ctr_drbg );
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if( argc == 0 )
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{
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usage:
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mbedtls_printf( USAGE );
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list = mbedtls_ssl_list_ciphersuites();
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while( *list )
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{
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mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name( *list ) );
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list++;
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}
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mbedtls_printf("\n");
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goto exit;
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}
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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.authentication = DFL_AUTHENTICATION;
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opt.mode = DFL_MODE;
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opt.user_name = DFL_USER_NAME;
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opt.user_pwd = DFL_USER_PWD;
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opt.mail_from = DFL_MAIL_FROM;
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opt.mail_to = DFL_MAIL_TO;
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opt.ca_file = DFL_CA_FILE;
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opt.crt_file = DFL_CRT_FILE;
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opt.key_file = DFL_KEY_FILE;
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opt.force_ciphersuite[0]= DFL_FORCE_CIPHER;
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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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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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opt.server_port = q;
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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, "authentication" ) == 0 )
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{
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opt.authentication = atoi( q );
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if( opt.authentication < 0 || opt.authentication > 1 )
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goto usage;
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}
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else if( strcmp( p, "mode" ) == 0 )
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{
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opt.mode = atoi( q );
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if( opt.mode < 0 || opt.mode > 1 )
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goto usage;
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}
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else if( strcmp( p, "user_name" ) == 0 )
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opt.user_name = q;
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else if( strcmp( p, "user_pwd" ) == 0 )
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opt.user_pwd = q;
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else if( strcmp( p, "mail_from" ) == 0 )
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opt.mail_from = q;
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else if( strcmp( p, "mail_to" ) == 0 )
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opt.mail_to = 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, "crt_file" ) == 0 )
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opt.crt_file = q;
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else if( strcmp( p, "key_file" ) == 0 )
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opt.key_file = q;
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else if( strcmp( p, "force_ciphersuite" ) == 0 )
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{
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opt.force_ciphersuite[0] = -1;
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opt.force_ciphersuite[0] = mbedtls_ssl_get_ciphersuite_id( q );
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if( opt.force_ciphersuite[0] <= 0 )
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goto usage;
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opt.force_ciphersuite[1] = 0;
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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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* 0. Initialize the RNG and the session data
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*/
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mbedtls_printf( "\n . Seeding the random number generator..." );
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fflush( stdout );
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mbedtls_entropy_init( &entropy );
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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\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf( " ok\n" );
|
|
|
|
/*
|
|
* 1.1. Load the trusted CA
|
|
*/
|
|
mbedtls_printf( " . Loading the CA root certificate ..." );
|
|
fflush( stdout );
|
|
|
|
#if defined(MBEDTLS_FS_IO)
|
|
if( strlen( opt.ca_file ) )
|
|
ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file );
|
|
else
|
|
#endif
|
|
#if defined(MBEDTLS_CERTS_C) && defined(MBEDTLS_PEM_PARSE_C)
|
|
ret = mbedtls_x509_crt_parse( &cacert, (const unsigned char *) mbedtls_test_cas_pem,
|
|
mbedtls_test_cas_pem_len );
|
|
#else
|
|
{
|
|
mbedtls_printf("MBEDTLS_CERTS_C and/or MBEDTLS_PEM_PARSE_C not defined.");
|
|
goto exit;
|
|
}
|
|
#endif
|
|
if( ret < 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf( " ok (%d skipped)\n", ret );
|
|
|
|
/*
|
|
* 1.2. Load own certificate and private key
|
|
*
|
|
* (can be skipped if client authentication is not required)
|
|
*/
|
|
mbedtls_printf( " . Loading the client cert. and key..." );
|
|
fflush( stdout );
|
|
|
|
#if defined(MBEDTLS_FS_IO)
|
|
if( strlen( opt.crt_file ) )
|
|
ret = mbedtls_x509_crt_parse_file( &clicert, opt.crt_file );
|
|
else
|
|
#endif
|
|
#if defined(MBEDTLS_CERTS_C)
|
|
ret = mbedtls_x509_crt_parse( &clicert, (const unsigned char *) mbedtls_test_cli_crt,
|
|
mbedtls_test_cli_crt_len );
|
|
#else
|
|
{
|
|
mbedtls_printf("MBEDTLS_CERTS_C not defined.");
|
|
goto exit;
|
|
}
|
|
#endif
|
|
if( ret != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
#if defined(MBEDTLS_FS_IO)
|
|
if( strlen( opt.key_file ) )
|
|
ret = mbedtls_pk_parse_keyfile( &pkey, opt.key_file, "" );
|
|
else
|
|
#endif
|
|
#if defined(MBEDTLS_CERTS_C) && defined(MBEDTLS_PEM_PARSE_C)
|
|
ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_cli_key,
|
|
mbedtls_test_cli_key_len, NULL, 0 );
|
|
#else
|
|
{
|
|
mbedtls_printf("MBEDTLS_CERTS_C or MBEDTLS_PEM_PARSE_C not defined.");
|
|
goto exit;
|
|
}
|
|
#endif
|
|
if( ret != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf( " ok\n" );
|
|
|
|
/*
|
|
* 2. Start the connection
|
|
*/
|
|
mbedtls_printf( " . Connecting 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 exit;
|
|
}
|
|
|
|
mbedtls_printf( " ok\n" );
|
|
|
|
/*
|
|
* 3. Setup stuff
|
|
*/
|
|
mbedtls_printf( " . Setting up the SSL/TLS structure..." );
|
|
fflush( stdout );
|
|
|
|
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;
|
|
}
|
|
|
|
/* OPTIONAL is not optimal for security,
|
|
* but makes interop easier in this simplified example */
|
|
mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_OPTIONAL );
|
|
|
|
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
|
|
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
|
|
|
|
if( opt.force_ciphersuite[0] != DFL_FORCE_CIPHER )
|
|
mbedtls_ssl_conf_ciphersuites( &conf, opt.force_ciphersuite );
|
|
|
|
mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
|
|
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &clicert, &pkey ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned %d\n\n", ret );
|
|
goto 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 exit;
|
|
}
|
|
|
|
mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
|
|
|
|
mbedtls_printf( " ok\n" );
|
|
|
|
if( opt.mode == MODE_SSL_TLS )
|
|
{
|
|
if( do_handshake( &ssl ) != 0 )
|
|
goto exit;
|
|
|
|
mbedtls_printf( " > Get header from server:" );
|
|
fflush( stdout );
|
|
|
|
ret = write_ssl_and_get_response( &ssl, buf, 0 );
|
|
if( ret < 200 || ret > 299 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_printf( " > Write EHLO to server:" );
|
|
fflush( stdout );
|
|
|
|
gethostname( hostname, 32 );
|
|
len = sprintf( (char *) buf, "EHLO %s\r\n", hostname );
|
|
ret = write_ssl_and_get_response( &ssl, buf, len );
|
|
if( ret < 200 || ret > 299 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mbedtls_printf( " > Get header from server:" );
|
|
fflush( stdout );
|
|
|
|
ret = write_and_get_response( &server_fd, buf, 0 );
|
|
if( ret < 200 || ret > 299 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_printf( " > Write EHLO to server:" );
|
|
fflush( stdout );
|
|
|
|
gethostname( hostname, 32 );
|
|
len = sprintf( (char *) buf, "EHLO %s\r\n", hostname );
|
|
ret = write_and_get_response( &server_fd, buf, len );
|
|
if( ret < 200 || ret > 299 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_printf( " > Write STARTTLS to server:" );
|
|
fflush( stdout );
|
|
|
|
gethostname( hostname, 32 );
|
|
len = sprintf( (char *) buf, "STARTTLS\r\n" );
|
|
ret = write_and_get_response( &server_fd, buf, len );
|
|
if( ret < 200 || ret > 299 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
if( do_handshake( &ssl ) != 0 )
|
|
goto exit;
|
|
}
|
|
|
|
#if defined(MBEDTLS_BASE64_C)
|
|
if( opt.authentication )
|
|
{
|
|
mbedtls_printf( " > Write AUTH LOGIN to server:" );
|
|
fflush( stdout );
|
|
|
|
len = sprintf( (char *) buf, "AUTH LOGIN\r\n" );
|
|
ret = write_ssl_and_get_response( &ssl, buf, len );
|
|
if( ret < 200 || ret > 399 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_printf( " > Write username to server: %s", opt.user_name );
|
|
fflush( stdout );
|
|
|
|
ret = mbedtls_base64_encode( base, sizeof( base ), &n, (const unsigned char *) opt.user_name,
|
|
strlen( opt.user_name ) );
|
|
|
|
if( ret != 0 ) {
|
|
mbedtls_printf( " failed\n ! mbedtls_base64_encode returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
len = sprintf( (char *) buf, "%s\r\n", base );
|
|
ret = write_ssl_and_get_response( &ssl, buf, len );
|
|
if( ret < 300 || ret > 399 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_printf( " > Write password to server: %s", opt.user_pwd );
|
|
fflush( stdout );
|
|
|
|
ret = mbedtls_base64_encode( base, sizeof( base ), &n, (const unsigned char *) opt.user_pwd,
|
|
strlen( opt.user_pwd ) );
|
|
|
|
if( ret != 0 ) {
|
|
mbedtls_printf( " failed\n ! mbedtls_base64_encode returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
len = sprintf( (char *) buf, "%s\r\n", base );
|
|
ret = write_ssl_and_get_response( &ssl, buf, len );
|
|
if( ret < 200 || ret > 399 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
}
|
|
#endif
|
|
|
|
mbedtls_printf( " > Write MAIL FROM to server:" );
|
|
fflush( stdout );
|
|
|
|
len = sprintf( (char *) buf, "MAIL FROM:<%s>\r\n", opt.mail_from );
|
|
ret = write_ssl_and_get_response( &ssl, buf, len );
|
|
if( ret < 200 || ret > 299 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_printf( " > Write RCPT TO to server:" );
|
|
fflush( stdout );
|
|
|
|
len = sprintf( (char *) buf, "RCPT TO:<%s>\r\n", opt.mail_to );
|
|
ret = write_ssl_and_get_response( &ssl, buf, len );
|
|
if( ret < 200 || ret > 299 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_printf( " > Write DATA to server:" );
|
|
fflush( stdout );
|
|
|
|
len = sprintf( (char *) buf, "DATA\r\n" );
|
|
ret = write_ssl_and_get_response( &ssl, buf, len );
|
|
if( ret < 300 || ret > 399 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_printf( " > Write content to server:" );
|
|
fflush( stdout );
|
|
|
|
len = sprintf( (char *) buf, "From: %s\r\nSubject: mbed TLS Test mail\r\n\r\n"
|
|
"This is a simple test mail from the "
|
|
"mbed TLS mail client example.\r\n"
|
|
"\r\n"
|
|
"Enjoy!", opt.mail_from );
|
|
ret = write_ssl_data( &ssl, buf, len );
|
|
|
|
len = sprintf( (char *) buf, "\r\n.\r\n");
|
|
ret = write_ssl_and_get_response( &ssl, buf, len );
|
|
if( ret < 200 || ret > 299 )
|
|
{
|
|
mbedtls_printf( " failed\n ! server responded with %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf(" ok\n" );
|
|
|
|
mbedtls_ssl_close_notify( &ssl );
|
|
|
|
exit_code = MBEDTLS_EXIT_SUCCESS;
|
|
|
|
exit:
|
|
|
|
mbedtls_net_free( &server_fd );
|
|
mbedtls_x509_crt_free( &clicert );
|
|
mbedtls_x509_crt_free( &cacert );
|
|
mbedtls_pk_free( &pkey );
|
|
mbedtls_ssl_free( &ssl );
|
|
mbedtls_ssl_config_free( &conf );
|
|
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_CTR_DRBG_C */
|