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Diffstat (limited to 'programs/ssl/ssl_mail_client.c')
-rw-r--r--programs/ssl/ssl_mail_client.c843
1 files changed, 843 insertions, 0 deletions
diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
new file mode 100644
index 000000000..9fb65079e
--- /dev/null
+++ b/programs/ssl/ssl_mail_client.c
@@ -0,0 +1,843 @@
+/*
+ * SSL client for SMTP servers
+ *
+ * Copyright The Mbed TLS Contributors
+ * 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.
+ */
+
+/* Enable definition of gethostname() even when compiling with -std=c99. Must
+ * be set before mbedtls_config.h, which pulls in glibc's features.h indirectly.
+ * Harmless on other platforms. */
+
+#define _POSIX_C_SOURCE 200112L
+#define _XOPEN_SOURCE 600
+
+#include "mbedtls/build_info.h"
+
+#include "mbedtls/platform.h"
+
+#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_CTR_DRBG_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \
+ !defined(MBEDTLS_FS_IO)
+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_CTR_DRBG_C and/or MBEDTLS_X509_CRT_PARSE_C "
+ "not defined.\n");
+ mbedtls_exit( 0 );
+}
+#else
+
+#include "mbedtls/base64.h"
+#include "mbedtls/error.h"
+#include "mbedtls/net_sockets.h"
+#include "mbedtls/ssl.h"
+#include "mbedtls/entropy.h"
+#include "mbedtls/ctr_drbg.h"
+#include "test/certs.h"
+#include "mbedtls/x509.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#if !defined(_MSC_VER) || defined(EFIX64) || defined(EFI32)
+#include <unistd.h>
+#else
+#include <io.h>
+#endif
+
+#if defined(_WIN32) || defined(_WIN32_WCE)
+#include <winsock2.h>
+#include <windows.h>
+
+#if defined(_MSC_VER)
+#if defined(_WIN32_WCE)
+#pragma comment( lib, "ws2.lib" )
+#else
+#pragma comment( lib, "ws2_32.lib" )
+#endif
+#endif /* _MSC_VER */
+#endif
+
+#define DFL_SERVER_NAME "localhost"
+#define DFL_SERVER_PORT "465"
+#define DFL_USER_NAME "user"
+#define DFL_USER_PWD "password"
+#define DFL_MAIL_FROM ""
+#define DFL_MAIL_TO ""
+#define DFL_DEBUG_LEVEL 0
+#define DFL_CA_FILE ""
+#define DFL_CRT_FILE ""
+#define DFL_KEY_FILE ""
+#define DFL_FORCE_CIPHER 0
+#define DFL_MODE 0
+#define DFL_AUTHENTICATION 0
+
+#define MODE_SSL_TLS 0
+#define MODE_STARTTLS 0
+
+#if defined(MBEDTLS_BASE64_C)
+#define USAGE_AUTH \
+ " authentication=%%d default: 0 (disabled)\n" \
+ " user_name=%%s default: \"" DFL_USER_NAME "\"\n" \
+ " user_pwd=%%s default: \"" DFL_USER_PWD "\"\n"
+#else
+#define USAGE_AUTH \
+ " authentication options disabled. (Require MBEDTLS_BASE64_C)\n"
+#endif /* MBEDTLS_BASE64_C */
+
+#if defined(MBEDTLS_FS_IO)
+#define USAGE_IO \
+ " ca_file=%%s default: \"\" (pre-loaded)\n" \
+ " crt_file=%%s default: \"\" (pre-loaded)\n" \
+ " key_file=%%s default: \"\" (pre-loaded)\n"
+#else
+#define USAGE_IO \
+ " No file operations available (MBEDTLS_FS_IO not defined)\n"
+#endif /* MBEDTLS_FS_IO */
+
+#define USAGE \
+ "\n usage: ssl_mail_client param=<>...\n" \
+ "\n acceptable parameters:\n" \
+ " server_name=%%s default: " DFL_SERVER_NAME "\n" \
+ " server_port=%%d default: " DFL_SERVER_PORT "\n" \
+ " debug_level=%%d default: 0 (disabled)\n" \
+ " mode=%%d default: 0 (SSL/TLS) (1 for STARTTLS)\n" \
+ USAGE_AUTH \
+ " mail_from=%%s default: \"\"\n" \
+ " mail_to=%%s default: \"\"\n" \
+ USAGE_IO \
+ " force_ciphersuite=<name> default: all enabled\n" \
+ " acceptable ciphersuite names:\n"
+
+
+/*
+ * global options
+ */
+struct options
+{
+ 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 authentication; /* if authentication is required */
+ int mode; /* SSL/TLS (0) or STARTTLS (1) */
+ const char *user_name; /* username to use for authentication */
+ const char *user_pwd; /* password to use for authentication */
+ const char *mail_from; /* E-Mail address to use as sender */
+ const char *mail_to; /* E-Mail address to use as recipient */
+ const char *ca_file; /* the file with the CA certificate(s) */
+ const char *crt_file; /* the file with the client certificate */
+ const char *key_file; /* the file with the client key */
+ int force_ciphersuite[2]; /* protocol/ciphersuite to use, or all */
+} 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 do_handshake( mbedtls_ssl_context *ssl )
+{
+ int ret;
+ uint32_t flags;
+ unsigned char buf[1024];
+ memset(buf, 0, 1024);
+
+ /*
+ * 4. Handshake
+ */
+ mbedtls_printf( " . Performing the SSL/TLS handshake..." );
+ fflush( stdout );
+
+ while( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
+ {
+ if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
+ {
+#if defined(MBEDTLS_ERROR_C)
+ mbedtls_strerror( ret, (char *) buf, 1024 );
+#endif
+ mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned %d: %s\n\n", ret, buf );
+ return( -1 );
+ }
+ }
+
+ mbedtls_printf( " ok\n [ Ciphersuite is %s ]\n",
+ mbedtls_ssl_get_ciphersuite( ssl ) );
+
+ /*
+ * 5. Verify the server certificate
+ */
+ mbedtls_printf( " . Verifying peer X.509 certificate..." );
+
+ /* In real life, we probably want to bail out when ret != 0 */
+ if( ( flags = mbedtls_ssl_get_verify_result( ssl ) ) != 0 )
+ {
+#if !defined(MBEDTLS_X509_REMOVE_INFO)
+ char vrfy_buf[512];
+#endif
+
+ mbedtls_printf( " failed\n" );
+
+#if !defined(MBEDTLS_X509_REMOVE_INFO)
+ mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
+
+ mbedtls_printf( "%s\n", vrfy_buf );
+#endif
+ }
+ else
+ mbedtls_printf( " ok\n" );
+
+#if !defined(MBEDTLS_X509_REMOVE_INFO)
+ mbedtls_printf( " . Peer certificate information ...\n" );
+ mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
+ mbedtls_ssl_get_peer_cert( ssl ) );
+ mbedtls_printf( "%s\n", buf );
+#endif
+
+ return( 0 );
+}
+
+static int write_ssl_data( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
+{
+ int ret;
+
+ mbedtls_printf("\n%s", buf);
+ while( len && ( ret = mbedtls_ssl_write( ssl, buf, len ) ) <= 0 )
+ {
+ if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
+ return -1;
+ }
+ }
+
+ return( 0 );
+}
+
+static int write_ssl_and_get_response( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
+{
+ int ret;
+ unsigned char data[128];
+ char code[4];
+ size_t i, idx = 0;
+
+ mbedtls_printf("\n%s", buf);
+ while( len && ( ret = mbedtls_ssl_write( ssl, buf, len ) ) <= 0 )
+ {
+ if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
+ return -1;
+ }
+ }
+
+ do
+ {
+ len = sizeof( data ) - 1;
+ memset( data, 0, sizeof( data ) );
+ ret = mbedtls_ssl_read( ssl, data, len );
+
+ if( ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE )
+ continue;
+
+ if( ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY )
+ return -1;
+
+ if( ret <= 0 )
+ {
+ mbedtls_printf( "failed\n ! mbedtls_ssl_read returned %d\n\n", ret );
+ return -1;
+ }
+
+ mbedtls_printf("\n%s", data);
+ len = ret;
+ for( i = 0; i < len; i++ )
+ {
+ if( data[i] != '\n' )
+ {
+ if( idx < 4 )
+ code[ idx++ ] = data[i];
+ continue;
+ }
+
+ if( idx == 4 && code[0] >= '0' && code[0] <= '9' && code[3] == ' ' )
+ {
+ code[3] = '\0';
+ return atoi( code );
+ }
+
+ idx = 0;
+ }
+ }
+ while( 1 );
+}
+
+static int write_and_get_response( mbedtls_net_context *sock_fd, unsigned char *buf, size_t len )
+{
+ int ret;
+ unsigned char data[128];
+ char code[4];
+ size_t i, idx = 0;
+
+ mbedtls_printf("\n%s", buf);
+ if( len && ( ret = mbedtls_net_send( sock_fd, buf, len ) ) <= 0 )
+ {
+ mbedtls_printf( " failed\n ! mbedtls_net_send returned %d\n\n", ret );
+ return -1;
+ }
+
+ do
+ {
+ len = sizeof( data ) - 1;
+ memset( data, 0, sizeof( data ) );
+ ret = mbedtls_net_recv( sock_fd, data, len );
+
+ if( ret <= 0 )
+ {
+ mbedtls_printf( "failed\n ! mbedtls_net_recv returned %d\n\n", ret );
+ return -1;
+ }
+
+ data[len] = '\0';
+ mbedtls_printf("\n%s", data);
+ len = ret;
+ for( i = 0; i < len; i++ )
+ {
+ if( data[i] != '\n' )
+ {
+ if( idx < 4 )
+ code[ idx++ ] = data[i];
+ continue;
+ }
+
+ if( idx == 4 && code[0] >= '0' && code[0] <= '9' && code[3] == ' ' )
+ {
+ code[3] = '\0';
+ return atoi( code );
+ }
+
+ idx = 0;
+ }
+ }
+ while( 1 );
+}
+
+int main( int argc, char *argv[] )
+{
+ int ret = 1, len;
+ int exit_code = MBEDTLS_EXIT_FAILURE;
+ mbedtls_net_context server_fd;
+#if defined(MBEDTLS_BASE64_C)
+ unsigned char base[1024];
+ /* buf is used as the destination buffer for printing base with the format:
+ * "%s\r\n". Hence, the size of buf should be at least the size of base
+ * plus 2 bytes for the \r and \n characters.
+ */
+ unsigned char buf[sizeof( base ) + 2];
+#else
+ unsigned char buf[1024];
+#endif
+ char hostname[32];
+ const char *pers = "ssl_mail_client";
+
+ mbedtls_entropy_context entropy;
+ mbedtls_ctr_drbg_context ctr_drbg;
+ mbedtls_ssl_context ssl;
+ mbedtls_ssl_config conf;
+ mbedtls_x509_crt cacert;
+ mbedtls_x509_crt clicert;
+ mbedtls_pk_context pkey;
+ int i;
+ size_t n;
+ char *p, *q;
+ const int *list;
+
+ /*
+ * Make sure memory references are valid in case we exit early.
+ */
+ mbedtls_net_init( &server_fd );
+ mbedtls_ssl_init( &ssl );
+ mbedtls_ssl_config_init( &conf );
+ memset( &buf, 0, sizeof( buf ) );
+ mbedtls_x509_crt_init( &cacert );
+ mbedtls_x509_crt_init( &clicert );
+ mbedtls_pk_init( &pkey );
+ mbedtls_ctr_drbg_init( &ctr_drbg );
+
+ if( argc == 0 )
+ {
+ usage:
+ mbedtls_printf( USAGE );
+
+ list = mbedtls_ssl_list_ciphersuites();
+ while( *list )
+ {
+ mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name( *list ) );
+ list++;
+ }
+ mbedtls_printf("\n");
+ goto exit;
+ }
+
+ opt.server_name = DFL_SERVER_NAME;
+ opt.server_port = DFL_SERVER_PORT;
+ opt.debug_level = DFL_DEBUG_LEVEL;
+ opt.authentication = DFL_AUTHENTICATION;
+ opt.mode = DFL_MODE;
+ opt.user_name = DFL_USER_NAME;
+ opt.user_pwd = DFL_USER_PWD;
+ opt.mail_from = DFL_MAIL_FROM;
+ opt.mail_to = DFL_MAIL_TO;
+ opt.ca_file = DFL_CA_FILE;
+ opt.crt_file = DFL_CRT_FILE;
+ opt.key_file = DFL_KEY_FILE;
+ opt.force_ciphersuite[0]= DFL_FORCE_CIPHER;
+
+ for( i = 1; i < argc; i++ )
+ {
+ p = argv[i];
+ if( ( q = strchr( p, '=' ) ) == NULL )
+ goto usage;
+ *q++ = '\0';
+
+ 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, "authentication" ) == 0 )
+ {
+ opt.authentication = atoi( q );
+ if( opt.authentication < 0 || opt.authentication > 1 )
+ goto usage;
+ }
+ else if( strcmp( p, "mode" ) == 0 )
+ {
+ opt.mode = atoi( q );
+ if( opt.mode < 0 || opt.mode > 1 )
+ goto usage;
+ }
+ else if( strcmp( p, "user_name" ) == 0 )
+ opt.user_name = q;
+ else if( strcmp( p, "user_pwd" ) == 0 )
+ opt.user_pwd = q;
+ else if( strcmp( p, "mail_from" ) == 0 )
+ opt.mail_from = q;
+ else if( strcmp( p, "mail_to" ) == 0 )
+ opt.mail_to = q;
+ else if( strcmp( p, "ca_file" ) == 0 )
+ opt.ca_file = q;
+ else if( strcmp( p, "crt_file" ) == 0 )
+ opt.crt_file = q;
+ else if( strcmp( p, "key_file" ) == 0 )
+ opt.key_file = q;
+ else if( strcmp( p, "force_ciphersuite" ) == 0 )
+ {
+ opt.force_ciphersuite[0] = -1;
+
+ opt.force_ciphersuite[0] = mbedtls_ssl_get_ciphersuite_id( q );
+
+ if( opt.force_ciphersuite[0] <= 0 )
+ goto usage;
+
+ opt.force_ciphersuite[1] = 0;
+ }
+ else
+ goto usage;
+ }
+
+ /*
+ * 0. 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 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_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_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
+ ret = mbedtls_x509_crt_parse( &clicert, (const unsigned char *) mbedtls_test_cli_crt,
+ mbedtls_test_cli_crt_len );
+ 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, "",
+ mbedtls_ctr_drbg_random, &ctr_drbg );
+ }
+ else
+#endif
+#if 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, mbedtls_ctr_drbg_random, &ctr_drbg );
+ }
+#else
+ {
+ mbedtls_printf("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 );
+
+ mbedtls_exit( 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 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-13 15:52:54 +0000