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mbedtls/programs/ssl/ssl_server2.c
Manuel Pégourié-Gonnard a2cda6bfaf Add mbedtls_ssl_get_max_frag_len() 
This is not very useful for TLS as mbedtls_ssl_write() will automatically
fragment and return the length used, and the application should check for that
anyway, but this is useful for DTLS where mbedtls_ssl_write() returns an
error, and the application needs to be able to query the maximum length
instead of just guessing.
2015-08-31 20:47:04 +02:00

2303 lines
73 KiB
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/*
* SSL client with options
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
*
* This file is part of mbed TLS (https://tls.mbed.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdio.h>
#define mbedtls_free free
#define mbedtls_calloc calloc
#define mbedtls_fprintf fprintf
#define mbedtls_printf printf
#endif
#if !defined(MBEDTLS_ENTROPY_C) || \
!defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_SRV_C) || \
!defined(MBEDTLS_NET_C) || !defined(MBEDTLS_CTR_DRBG_C)
int main( void )
{
mbedtls_printf("MBEDTLS_ENTROPY_C and/or "
"MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_SRV_C and/or "
"MBEDTLS_NET_C and/or MBEDTLS_CTR_DRBG_C and/or not defined.\n");
return( 0 );
}
#else
#include "mbedtls/net.h"
#include "mbedtls/ssl.h"
#include "mbedtls/entropy.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/certs.h"
#include "mbedtls/x509.h"
#include "mbedtls/error.h"
#include "mbedtls/debug.h"
#include "mbedtls/timing.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if !defined(_WIN32)
#include <signal.h>
#endif
#if defined(MBEDTLS_SSL_CACHE_C)
#include "mbedtls/ssl_cache.h"
#endif
#if defined(MBEDTLS_SSL_TICKET_C)
#include "mbedtls/ssl_ticket.h"
#endif
#if defined(MBEDTLS_SSL_COOKIE_C)
#include "mbedtls/ssl_cookie.h"
#endif
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
#include "mbedtls/memory_buffer_alloc.h"
#endif
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) && defined(MBEDTLS_FS_IO)
#define SNI_OPTION
#endif
#if defined(_WIN32)
#include <windows.h>
#endif
#define DFL_SERVER_ADDR NULL
#define DFL_SERVER_PORT "4433"
#define DFL_DEBUG_LEVEL 0
#define DFL_NBIO 0
#define DFL_READ_TIMEOUT 0
#define DFL_CA_FILE ""
#define DFL_CA_PATH ""
#define DFL_CRT_FILE ""
#define DFL_KEY_FILE ""
#define DFL_CRT_FILE2 ""
#define DFL_KEY_FILE2 ""
#define DFL_PSK ""
#define DFL_PSK_IDENTITY "Client_identity"
#define DFL_PSK_LIST NULL
#define DFL_FORCE_CIPHER 0
#define DFL_VERSION_SUITES NULL
#define DFL_RENEGOTIATION MBEDTLS_SSL_RENEGOTIATION_DISABLED
#define DFL_ALLOW_LEGACY -2
#define DFL_RENEGOTIATE 0
#define DFL_RENEGO_DELAY -2
#define DFL_RENEGO_PERIOD -1
#define DFL_EXCHANGES 1
#define DFL_MIN_VERSION -1
#define DFL_MAX_VERSION -1
#define DFL_ARC4 -1
#define DFL_AUTH_MODE -1
#define DFL_MFL_CODE MBEDTLS_SSL_MAX_FRAG_LEN_NONE
#define DFL_TRUNC_HMAC -1
#define DFL_TICKETS MBEDTLS_SSL_SESSION_TICKETS_ENABLED
#define DFL_TICKET_TIMEOUT 86400
#define DFL_CACHE_MAX -1
#define DFL_CACHE_TIMEOUT -1
#define DFL_SNI NULL
#define DFL_ALPN_STRING NULL
#define DFL_DHM_FILE NULL
#define DFL_TRANSPORT MBEDTLS_SSL_TRANSPORT_STREAM
#define DFL_COOKIES 1
#define DFL_ANTI_REPLAY -1
#define DFL_HS_TO_MIN 0
#define DFL_HS_TO_MAX 0
#define DFL_BADMAC_LIMIT -1
#define DFL_EXTENDED_MS -1
#define DFL_ETM -1
#define LONG_RESPONSE "<p>01-blah-blah-blah-blah-blah-blah-blah-blah-blah\r\n" \
"02-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah\r\n" \
"03-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah\r\n" \
"04-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah\r\n" \
"05-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah\r\n" \
"06-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah\r\n" \
"07-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah-blah</p>\r\n"
/* Uncomment LONG_RESPONSE at the end of HTTP_RESPONSE to test sending longer
* packets (for fragmentation purposes) */
#define HTTP_RESPONSE \
"HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n" \
"<h2>mbed TLS Test Server</h2>\r\n" \
"<p>Successful connection using: %s</p>\r\n" // LONG_RESPONSE
/*
* Size of the basic I/O buffer. Able to hold our default response.
*
* You will need to adapt the mbedtls_ssl_get_bytes_avail() test in ssl-opt.sh
* if you change this value to something outside the range <= 100 or > 500
*/
#define IO_BUF_LEN 200
#if defined(MBEDTLS_X509_CRT_PARSE_C)
#if defined(MBEDTLS_FS_IO)
#define USAGE_IO \
" ca_file=%%s The single file containing the top-level CA(s) you fully trust\n" \
" default: \"\" (pre-loaded)\n" \
" ca_path=%%s The path containing the top-level CA(s) you fully trust\n" \
" default: \"\" (pre-loaded) (overrides ca_file)\n" \
" crt_file=%%s Your own cert and chain (in bottom to top order, top may be omitted)\n" \
" default: see note after key_file2\n" \
" key_file=%%s default: see note after key_file2\n" \
" crt_file2=%%s Your second cert and chain (in bottom to top order, top may be omitted)\n" \
" default: see note after key_file2\n" \
" key_file2=%%s default: see note below\n" \
" note: if neither crt_file/key_file nor crt_file2/key_file2 are used,\n" \
" preloaded certificate(s) and key(s) are used if available\n" \
" dhm_file=%%s File containing Diffie-Hellman parameters\n" \
" default: preloaded parameters\n"
#else
#define USAGE_IO \
"\n" \
" No file operations available (MBEDTLS_FS_IO not defined)\n" \
"\n"
#endif /* MBEDTLS_FS_IO */
#else
#define USAGE_IO ""
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
#define USAGE_PSK \
" psk=%%s default: \"\" (in hex, without 0x)\n" \
" psk_identity=%%s default: \"Client_identity\"\n"
#else
#define USAGE_PSK ""
#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
#define USAGE_TICKETS \
" tickets=%%d default: 1 (enabled)\n" \
" ticket_timeout=%%d default: 86400 (one day)\n"
#else
#define USAGE_TICKETS ""
#endif /* MBEDTLS_SSL_SESSION_TICKETS */
#if defined(MBEDTLS_SSL_CACHE_C)
#define USAGE_CACHE \
" cache_max=%%d default: cache default (50)\n" \
" cache_timeout=%%d default: cache default (1d)\n"
#else
#define USAGE_CACHE ""
#endif /* MBEDTLS_SSL_CACHE_C */
#if defined(SNI_OPTION)
#define USAGE_SNI \
" sni=%%s name1,cert1,key1,ca1,crl1,auth1[,...]\n" \
" default: disabled\n"
#else
#define USAGE_SNI ""
#endif /* SNI_OPTION */
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
#define USAGE_MAX_FRAG_LEN \
" max_frag_len=%%d default: 16384 (tls default)\n" \
" options: 512, 1024, 2048, 4096\n"
#else
#define USAGE_MAX_FRAG_LEN ""
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
#define USAGE_TRUNC_HMAC \
" trunc_hmac=%%d default: library default\n"
#else
#define USAGE_TRUNC_HMAC ""
#endif
#if defined(MBEDTLS_SSL_ALPN)
#define USAGE_ALPN \
" alpn=%%s default: \"\" (disabled)\n" \
" example: spdy/1,http/1.1\n"
#else
#define USAGE_ALPN ""
#endif /* MBEDTLS_SSL_ALPN */
#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
#define USAGE_COOKIES \
" cookies=0/1/-1 default: 1 (enabled)\n" \
" 0: disabled, -1: library default (broken)\n"
#else
#define USAGE_COOKIES ""
#endif
#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
#define USAGE_ANTI_REPLAY \
" anti_replay=0/1 default: (library default: enabled)\n"
#else
#define USAGE_ANTI_REPLAY ""
#endif
#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
#define USAGE_BADMAC_LIMIT \
" badmac_limit=%%d default: (library default: disabled)\n"
#else
#define USAGE_BADMAC_LIMIT ""
#endif
#if defined(MBEDTLS_SSL_PROTO_DTLS)
#define USAGE_DTLS \
" dtls=%%d default: 0 (TLS)\n" \
" hs_timeout=%%d-%%d default: (library default: 1000-60000)\n" \
" range of DTLS handshake timeouts in millisecs\n"
#else
#define USAGE_DTLS ""
#endif
#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
#define USAGE_EMS \
" extended_ms=0/1 default: (library default: on)\n"
#else
#define USAGE_EMS ""
#endif
#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
#define USAGE_ETM \
" etm=0/1 default: (library default: on)\n"
#else
#define USAGE_ETM ""
#endif
#if defined(MBEDTLS_SSL_RENEGOTIATION)
#define USAGE_RENEGO \
" renegotiation=%%d default: 0 (disabled)\n" \
" renegotiate=%%d default: 0 (disabled)\n" \
" renego_delay=%%d default: -2 (library default)\n" \
" renego_period=%%d default: (library default)\n"
#else
#define USAGE_RENEGO ""
#endif
#define USAGE \
"\n usage: ssl_server2 param=<>...\n" \
"\n acceptable parameters:\n" \
" server_addr=%%d default: (all interfaces)\n" \
" server_port=%%d default: 4433\n" \
" debug_level=%%d default: 0 (disabled)\n" \
" nbio=%%d default: 0 (blocking I/O)\n" \
" options: 1 (non-blocking), 2 (added delays)\n" \
" read_timeout=%%d default: 0 (no timeout)\n" \
"\n" \
USAGE_DTLS \
USAGE_COOKIES \
USAGE_ANTI_REPLAY \
USAGE_BADMAC_LIMIT \
"\n" \
" auth_mode=%%s default: (library default: none)\n" \
" options: none, optional, required\n" \
USAGE_IO \
USAGE_SNI \
"\n" \
USAGE_PSK \
"\n" \
" allow_legacy=%%d default: (library default: no)\n" \
USAGE_RENEGO \
" exchanges=%%d default: 1\n" \
"\n" \
USAGE_TICKETS \
USAGE_CACHE \
USAGE_MAX_FRAG_LEN \
USAGE_TRUNC_HMAC \
USAGE_ALPN \
USAGE_EMS \
USAGE_ETM \
"\n" \
" arc4=%%d default: (library default: 0)\n" \
" min_version=%%s default: (library default: tls1)\n" \
" max_version=%%s default: (library default: tls1_2)\n" \
" force_version=%%s default: \"\" (none)\n" \
" options: ssl3, tls1, tls1_1, tls1_2, dtls1, dtls1_2\n" \
"\n" \
" version_suites=a,b,c,d per-version ciphersuites\n" \
" in order from ssl3 to tls1_2\n" \
" default: all enabled\n" \
" force_ciphersuite=<name> default: all enabled\n" \
" acceptable ciphersuite names:\n"
/*
* global options
*/
struct options
{
const char *server_addr; /* address on which the ssl service runs */
const char *server_port; /* port on which the ssl service runs */
int debug_level; /* level of debugging */
int nbio; /* should I/O be blocking? */
uint32_t read_timeout; /* timeout on mbedtls_ssl_read() in milliseconds */
const char *ca_file; /* the file with the CA certificate(s) */
const char *ca_path; /* the path with the CA certificate(s) reside */
const char *crt_file; /* the file with the server certificate */
const char *key_file; /* the file with the server key */
const char *crt_file2; /* the file with the 2nd server certificate */
const char *key_file2; /* the file with the 2nd server key */
const char *psk; /* the pre-shared key */
const char *psk_identity; /* the pre-shared key identity */
char *psk_list; /* list of PSK id/key pairs for callback */
int force_ciphersuite[2]; /* protocol/ciphersuite to use, or all */
const char *version_suites; /* per-version ciphersuites */
int renegotiation; /* enable / disable renegotiation */
int allow_legacy; /* allow legacy renegotiation */
int renegotiate; /* attempt renegotiation? */
int renego_delay; /* delay before enforcing renegotiation */
int renego_period; /* period for automatic renegotiation */
int exchanges; /* number of data exchanges */
int min_version; /* minimum protocol version accepted */
int max_version; /* maximum protocol version accepted */
int arc4; /* flag for arc4 suites support */
int auth_mode; /* verify mode for connection */
unsigned char mfl_code; /* code for maximum fragment length */
int trunc_hmac; /* accept truncated hmac? */
int tickets; /* enable / disable session tickets */
int ticket_timeout; /* session ticket lifetime */
int cache_max; /* max number of session cache entries */
int cache_timeout; /* expiration delay of session cache entries */
char *sni; /* string describing sni information */
const char *alpn_string; /* ALPN supported protocols */
const char *dhm_file; /* the file with the DH parameters */
int extended_ms; /* allow negotiation of extended MS? */
int etm; /* allow negotiation of encrypt-then-MAC? */
int transport; /* TLS or DTLS? */
int cookies; /* Use cookies for DTLS? -1 to break them */
int anti_replay; /* Use anti-replay for DTLS? -1 for default */
uint32_t hs_to_min; /* Initial value of DTLS handshake timer */
uint32_t hs_to_max; /* Max value of DTLS handshake timer */
int badmac_limit; /* Limit of records with bad MAC */
} opt;
static void my_debug( void *ctx, int level,
const char *file, int line,
const char *str )
{
const char *p, *basename;
/* Extract basename from file */
for( p = basename = file; *p != '\0'; p++ )
if( *p == '/' || *p == '\\' )
basename = p + 1;
mbedtls_fprintf( (FILE *) ctx, "%s:%04d: |%d| %s", basename, line, level, str );
fflush( (FILE *) ctx );
}
/*
* Test recv/send functions that make sure each try returns
* WANT_READ/WANT_WRITE at least once before sucesseding
*/
static int my_recv( void *ctx, unsigned char *buf, size_t len )
{
static int first_try = 1;
int ret;
if( first_try )
{
first_try = 0;
return( MBEDTLS_ERR_SSL_WANT_READ );
}
ret = mbedtls_net_recv( ctx, buf, len );
if( ret != MBEDTLS_ERR_SSL_WANT_READ )
first_try = 1; /* Next call will be a new operation */
return( ret );
}
static int my_send( void *ctx, const unsigned char *buf, size_t len )
{
static int first_try = 1;
int ret;
if( first_try )
{
first_try = 0;
return( MBEDTLS_ERR_SSL_WANT_WRITE );
}
ret = mbedtls_net_send( ctx, buf, len );
if( ret != MBEDTLS_ERR_SSL_WANT_WRITE )
first_try = 1; /* Next call will be a new operation */
return( ret );
}
/*
* Return authmode from string, or -1 on error
*/
static int get_auth_mode( const char *s )
{
if( strcmp( s, "none" ) == 0 )
return( MBEDTLS_SSL_VERIFY_NONE );
if( strcmp( s, "optional" ) == 0 )
return( MBEDTLS_SSL_VERIFY_OPTIONAL );
if( strcmp( s, "required" ) == 0 )
return( MBEDTLS_SSL_VERIFY_REQUIRED );
return( -1 );
}
/*
* Used by sni_parse and psk_parse to handle coma-separated lists
*/
#define GET_ITEM( dst ) \
dst = p; \
while( *p != ',' ) \
if( ++p > end ) \
goto error; \
*p++ = '\0';
#if defined(SNI_OPTION)
typedef struct _sni_entry sni_entry;
struct _sni_entry {
const char *name;
mbedtls_x509_crt *cert;
mbedtls_pk_context *key;
mbedtls_x509_crt* ca;
mbedtls_x509_crl* crl;
int authmode;
sni_entry *next;
};
void sni_free( sni_entry *head )
{
sni_entry *cur = head, *next;
while( cur != NULL )
{
mbedtls_x509_crt_free( cur->cert );
mbedtls_free( cur->cert );
mbedtls_pk_free( cur->key );
mbedtls_free( cur->key );
mbedtls_x509_crt_free( cur->ca );
mbedtls_free( cur->ca );
mbedtls_x509_crl_free( cur->crl );
mbedtls_free( cur->crl );
next = cur->next;
mbedtls_free( cur );
cur = next;
}
}
/*
* Parse a string of sextuples name1,crt1,key1,ca1,crl1,auth1[,...]
* into a usable sni_entry list. For ca1, crl1, auth1, the special value
* '-' means unset. If ca1 is unset, then crl1 is ignored too.
*
* Modifies the input string! This is not production quality!
*/
sni_entry *sni_parse( char *sni_string )
{
sni_entry *cur = NULL, *new = NULL;
char *p = sni_string;
char *end = p;
char *crt_file, *key_file, *ca_file, *crl_file, *auth_str;
while( *end != '\0' )
++end;
*end = ',';
while( p <= end )
{
if( ( new = mbedtls_calloc( 1, sizeof( sni_entry ) ) ) == NULL )
{
sni_free( cur );
return( NULL );
}
GET_ITEM( new->name );
GET_ITEM( crt_file );
GET_ITEM( key_file );
GET_ITEM( ca_file );
GET_ITEM( crl_file );
GET_ITEM( auth_str );
if( ( new->cert = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) ) ) == NULL ||
( new->key = mbedtls_calloc( 1, sizeof( mbedtls_pk_context ) ) ) == NULL )
goto error;
mbedtls_x509_crt_init( new->cert );
mbedtls_pk_init( new->key );
if( mbedtls_x509_crt_parse_file( new->cert, crt_file ) != 0 ||
mbedtls_pk_parse_keyfile( new->key, key_file, "" ) != 0 )
goto error;
if( strcmp( ca_file, "-" ) != 0 )
{
if( ( new->ca = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) ) ) == NULL )
goto error;
mbedtls_x509_crt_init( new->ca );
if( mbedtls_x509_crt_parse_file( new->ca, ca_file ) != 0 )
goto error;
}
if( strcmp( crl_file, "-" ) != 0 )
{
if( ( new->crl = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl ) ) ) == NULL )
goto error;
mbedtls_x509_crl_init( new->crl );
if( mbedtls_x509_crl_parse_file( new->crl, crl_file ) != 0 )
goto error;
}
if( strcmp( auth_str, "-" ) != 0 )
{
if( ( new->authmode = get_auth_mode( auth_str ) ) < 0 )
goto error;
}
else
new->authmode = DFL_AUTH_MODE;
new->next = cur;
cur = new;
}
return( cur );
error:
sni_free( new );
sni_free( cur );
return( NULL );
}
/*
* SNI callback.
*/
int sni_callback( void *p_info, mbedtls_ssl_context *ssl,
const unsigned char *name, size_t name_len )
{
const sni_entry *cur = (const sni_entry *) p_info;
while( cur != NULL )
{
if( name_len == strlen( cur->name ) &&
memcmp( name, cur->name, name_len ) == 0 )
{
if( cur->ca != NULL )
mbedtls_ssl_set_hs_ca_chain( ssl, cur->ca, cur->crl );
if( cur->authmode != DFL_AUTH_MODE )
mbedtls_ssl_set_hs_authmode( ssl, cur->authmode );
return( mbedtls_ssl_set_hs_own_cert( ssl, cur->cert, cur->key ) );
}
cur = cur->next;
}
return( -1 );
}
#endif /* SNI_OPTION */
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
#define HEX2NUM( c ) \
if( c >= '0' && c <= '9' ) \
c -= '0'; \
else if( c >= 'a' && c <= 'f' ) \
c -= 'a' - 10; \
else if( c >= 'A' && c <= 'F' ) \
c -= 'A' - 10; \
else \
return( -1 );
/*
* Convert a hex string to bytes.
* Return 0 on success, -1 on error.
*/
int unhexify( unsigned char *output, const char *input, size_t *olen )
{
unsigned char c;
size_t j;
*olen = strlen( input );
if( *olen % 2 != 0 || *olen / 2 > MBEDTLS_PSK_MAX_LEN )
return( -1 );
*olen /= 2;
for( j = 0; j < *olen * 2; j += 2 )
{
c = input[j];
HEX2NUM( c );
output[ j / 2 ] = c << 4;
c = input[j + 1];
HEX2NUM( c );
output[ j / 2 ] |= c;
}
return( 0 );
}
typedef struct _psk_entry psk_entry;
struct _psk_entry
{
const char *name;
size_t key_len;
unsigned char key[MBEDTLS_PSK_MAX_LEN];
psk_entry *next;
};
/*
* Free a list of psk_entry's
*/
void psk_free( psk_entry *head )
{
psk_entry *next;
while( head != NULL )
{
next = head->next;
mbedtls_free( head );
head = next;
}
}
/*
* Parse a string of pairs name1,key1[,name2,key2[,...]]
* into a usable psk_entry list.
*
* Modifies the input string! This is not production quality!
*/
psk_entry *psk_parse( char *psk_string )
{
psk_entry *cur = NULL, *new = NULL;
char *p = psk_string;
char *end = p;
char *key_hex;
while( *end != '\0' )
++end;
*end = ',';
while( p <= end )
{
if( ( new = mbedtls_calloc( 1, sizeof( psk_entry ) ) ) == NULL )
goto error;
memset( new, 0, sizeof( psk_entry ) );
GET_ITEM( new->name );
GET_ITEM( key_hex );
if( unhexify( new->key, key_hex, &new->key_len ) != 0 )
goto error;
new->next = cur;
cur = new;
}
return( cur );
error:
psk_free( new );
psk_free( cur );
return( 0 );
}
/*
* PSK callback
*/
int psk_callback( void *p_info, mbedtls_ssl_context *ssl,
const unsigned char *name, size_t name_len )
{
psk_entry *cur = (psk_entry *) p_info;
while( cur != NULL )
{
if( name_len == strlen( cur->name ) &&
memcmp( name, cur->name, name_len ) == 0 )
{
return( mbedtls_ssl_set_hs_psk( ssl, cur->key, cur->key_len ) );
}
cur = cur->next;
}
return( -1 );
}
#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
static mbedtls_net_context listen_fd, client_fd;
/* Interruption handler to ensure clean exit (for valgrind testing) */
#if !defined(_WIN32)
static int received_sigterm = 0;
void term_handler( int sig )
{
((void) sig);
received_sigterm = 1;
mbedtls_net_free( &listen_fd ); /* causes mbedtls_net_accept() to abort */
mbedtls_net_free( &client_fd ); /* causes net_read() to abort */
}
#endif
int main( int argc, char *argv[] )
{
int ret = 0, len, written, frags, exchanges_left;
int version_suites[4][2];
unsigned char buf[IO_BUF_LEN];
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
unsigned char psk[MBEDTLS_PSK_MAX_LEN];
size_t psk_len = 0;
psk_entry *psk_info = NULL;
#endif
const char *pers = "ssl_server2";
unsigned char client_ip[16] = { 0 };
size_t cliip_len;
#if defined(MBEDTLS_SSL_COOKIE_C)
mbedtls_ssl_cookie_ctx cookie_ctx;
#endif
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
#if defined(MBEDTLS_TIMING_C)
mbedtls_timing_delay_context timer;
#endif
#if defined(MBEDTLS_SSL_RENEGOTIATION)
unsigned char renego_period[8] = { 0 };
#endif
#if defined(MBEDTLS_X509_CRT_PARSE_C)
uint32_t flags;
mbedtls_x509_crt cacert;
mbedtls_x509_crt srvcert;
mbedtls_pk_context pkey;
mbedtls_x509_crt srvcert2;
mbedtls_pk_context pkey2;
int key_cert_init = 0, key_cert_init2 = 0;
#endif
#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_FS_IO)
mbedtls_dhm_context dhm;
#endif
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_context cache;
#endif
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
mbedtls_ssl_ticket_context ticket_ctx;
#endif
#if defined(SNI_OPTION)
sni_entry *sni_info = NULL;
#endif
#if defined(MBEDTLS_SSL_ALPN)
const char *alpn_list[10];
#endif
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
unsigned char alloc_buf[100000];
#endif
int i;
char *p, *q;
const int *list;
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
mbedtls_memory_buffer_alloc_init( alloc_buf, sizeof(alloc_buf) );
#endif
/*
* Make sure memory references are valid in case we exit early.
*/
mbedtls_net_init( &client_fd );
mbedtls_net_init( &listen_fd );
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
mbedtls_ctr_drbg_init( &ctr_drbg );
#if defined(MBEDTLS_X509_CRT_PARSE_C)
mbedtls_x509_crt_init( &cacert );
mbedtls_x509_crt_init( &srvcert );
mbedtls_pk_init( &pkey );
mbedtls_x509_crt_init( &srvcert2 );
mbedtls_pk_init( &pkey2 );
#endif
#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_FS_IO)
mbedtls_dhm_init( &dhm );
#endif
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_init( &cache );
#endif
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
mbedtls_ssl_ticket_init( &ticket_ctx );
#endif
#if defined(MBEDTLS_SSL_ALPN)
memset( (void *) alpn_list, 0, sizeof( alpn_list ) );
#endif
#if defined(MBEDTLS_SSL_COOKIE_C)
mbedtls_ssl_cookie_init( &cookie_ctx );
#endif
#if !defined(_WIN32)
/* Abort cleanly on SIGTERM and SIGINT */
signal( SIGTERM, term_handler );
signal( SIGINT, term_handler );
#endif
if( argc == 0 )
{
usage:
if( ret == 0 )
ret = 1;
mbedtls_printf( USAGE );
list = mbedtls_ssl_list_ciphersuites();
while( *list )
{
mbedtls_printf(" %-42s", mbedtls_ssl_get_ciphersuite_name( *list ) );
list++;
if( !*list )
break;
mbedtls_printf(" %s\n", mbedtls_ssl_get_ciphersuite_name( *list ) );
list++;
}
mbedtls_printf("\n");
goto exit;
}
opt.server_addr = DFL_SERVER_ADDR;
opt.server_port = DFL_SERVER_PORT;
opt.debug_level = DFL_DEBUG_LEVEL;
opt.nbio = DFL_NBIO;
opt.read_timeout = DFL_READ_TIMEOUT;
opt.ca_file = DFL_CA_FILE;
opt.ca_path = DFL_CA_PATH;
opt.crt_file = DFL_CRT_FILE;
opt.key_file = DFL_KEY_FILE;
opt.crt_file2 = DFL_CRT_FILE2;
opt.key_file2 = DFL_KEY_FILE2;
opt.psk = DFL_PSK;
opt.psk_identity = DFL_PSK_IDENTITY;
opt.psk_list = DFL_PSK_LIST;
opt.force_ciphersuite[0]= DFL_FORCE_CIPHER;
opt.version_suites = DFL_VERSION_SUITES;
opt.renegotiation = DFL_RENEGOTIATION;
opt.allow_legacy = DFL_ALLOW_LEGACY;
opt.renegotiate = DFL_RENEGOTIATE;
opt.renego_delay = DFL_RENEGO_DELAY;
opt.renego_period = DFL_RENEGO_PERIOD;
opt.exchanges = DFL_EXCHANGES;
opt.min_version = DFL_MIN_VERSION;
opt.max_version = DFL_MAX_VERSION;
opt.arc4 = DFL_ARC4;
opt.auth_mode = DFL_AUTH_MODE;
opt.mfl_code = DFL_MFL_CODE;
opt.trunc_hmac = DFL_TRUNC_HMAC;
opt.tickets = DFL_TICKETS;
opt.ticket_timeout = DFL_TICKET_TIMEOUT;
opt.cache_max = DFL_CACHE_MAX;
opt.cache_timeout = DFL_CACHE_TIMEOUT;
opt.sni = DFL_SNI;
opt.alpn_string = DFL_ALPN_STRING;
opt.dhm_file = DFL_DHM_FILE;
opt.transport = DFL_TRANSPORT;
opt.cookies = DFL_COOKIES;
opt.anti_replay = DFL_ANTI_REPLAY;
opt.hs_to_min = DFL_HS_TO_MIN;
opt.hs_to_max = DFL_HS_TO_MAX;
opt.badmac_limit = DFL_BADMAC_LIMIT;
opt.extended_ms = DFL_EXTENDED_MS;
opt.etm = DFL_ETM;
for( i = 1; i < argc; i++ )
{
p = argv[i];
if( ( q = strchr( p, '=' ) ) == NULL )
goto usage;
*q++ = '\0';
if( strcmp( p, "server_port" ) == 0 )
opt.server_port = q;
else if( strcmp( p, "server_addr" ) == 0 )
opt.server_addr = q;
else if( strcmp( p, "dtls" ) == 0 )
{
int t = atoi( q );
if( t == 0 )
opt.transport = MBEDTLS_SSL_TRANSPORT_STREAM;
else if( t == 1 )
opt.transport = MBEDTLS_SSL_TRANSPORT_DATAGRAM;
else
goto usage;
}
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, "nbio" ) == 0 )
{
opt.nbio = atoi( q );
if( opt.nbio < 0 || opt.nbio > 2 )
goto usage;
}
else if( strcmp( p, "read_timeout" ) == 0 )
opt.read_timeout = atoi( q );
else if( strcmp( p, "ca_file" ) == 0 )
opt.ca_file = q;
else if( strcmp( p, "ca_path" ) == 0 )
opt.ca_path = 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, "crt_file2" ) == 0 )
opt.crt_file2 = q;
else if( strcmp( p, "key_file2" ) == 0 )
opt.key_file2 = q;
else if( strcmp( p, "dhm_file" ) == 0 )
opt.dhm_file = q;
else if( strcmp( p, "psk" ) == 0 )
opt.psk = q;
else if( strcmp( p, "psk_identity" ) == 0 )
opt.psk_identity = q;
else if( strcmp( p, "psk_list" ) == 0 )
opt.psk_list = q;
else if( strcmp( p, "force_ciphersuite" ) == 0 )
{
opt.force_ciphersuite[0] = mbedtls_ssl_get_ciphersuite_id( q );
if( opt.force_ciphersuite[0] == 0 )
{
ret = 2;
goto usage;
}
opt.force_ciphersuite[1] = 0;
}
else if( strcmp( p, "version_suites" ) == 0 )
opt.version_suites = q;
else if( strcmp( p, "renegotiation" ) == 0 )
{
opt.renegotiation = (atoi( q )) ? MBEDTLS_SSL_RENEGOTIATION_ENABLED :
MBEDTLS_SSL_RENEGOTIATION_DISABLED;
}
else if( strcmp( p, "allow_legacy" ) == 0 )
{
switch( atoi( q ) )
{
case -1: opt.allow_legacy = MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE; break;
case 0: opt.allow_legacy = MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION; break;
case 1: opt.allow_legacy = MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION; break;
default: goto usage;
}
}
else if( strcmp( p, "renegotiate" ) == 0 )
{
opt.renegotiate = atoi( q );
if( opt.renegotiate < 0 || opt.renegotiate > 1 )
goto usage;
}
else if( strcmp( p, "renego_delay" ) == 0 )
{
opt.renego_delay = atoi( q );
}
else if( strcmp( p, "renego_period" ) == 0 )
{
opt.renego_period = atoi( q );
if( opt.renego_period < 2 || opt.renego_period > 255 )
goto usage;
}
else if( strcmp( p, "exchanges" ) == 0 )
{
opt.exchanges = atoi( q );
if( opt.exchanges < 0 )
goto usage;
}
else if( strcmp( p, "min_version" ) == 0 )
{
if( strcmp( q, "ssl3" ) == 0 )
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_0;
else if( strcmp( q, "tls1" ) == 0 )
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_1;
else if( strcmp( q, "tls1_1" ) == 0 ||
strcmp( q, "dtls1" ) == 0 )
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_2;
else if( strcmp( q, "tls1_2" ) == 0 ||
strcmp( q, "dtls1_2" ) == 0 )
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_3;
else
goto usage;
}
else if( strcmp( p, "max_version" ) == 0 )
{
if( strcmp( q, "ssl3" ) == 0 )
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_0;
else if( strcmp( q, "tls1" ) == 0 )
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_1;
else if( strcmp( q, "tls1_1" ) == 0 ||
strcmp( q, "dtls1" ) == 0 )
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_2;
else if( strcmp( q, "tls1_2" ) == 0 ||
strcmp( q, "dtls1_2" ) == 0 )
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_3;
else
goto usage;
}
else if( strcmp( p, "arc4" ) == 0 )
{
switch( atoi( q ) )
{
case 0: opt.arc4 = MBEDTLS_SSL_ARC4_DISABLED; break;
case 1: opt.arc4 = MBEDTLS_SSL_ARC4_ENABLED; break;
default: goto usage;
}
}
else if( strcmp( p, "force_version" ) == 0 )
{
if( strcmp( q, "ssl3" ) == 0 )
{
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_0;
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_0;
}
else if( strcmp( q, "tls1" ) == 0 )
{
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_1;
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_1;
}
else if( strcmp( q, "tls1_1" ) == 0 )
{
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_2;
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_2;
}
else if( strcmp( q, "tls1_2" ) == 0 )
{
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_3;
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_3;
}
else if( strcmp( q, "dtls1" ) == 0 )
{
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_2;
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_2;
opt.transport = MBEDTLS_SSL_TRANSPORT_DATAGRAM;
}
else if( strcmp( q, "dtls1_2" ) == 0 )
{
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_3;
opt.max_version = MBEDTLS_SSL_MINOR_VERSION_3;
opt.transport = MBEDTLS_SSL_TRANSPORT_DATAGRAM;
}
else
goto usage;
}
else if( strcmp( p, "auth_mode" ) == 0 )
{
if( ( opt.auth_mode = get_auth_mode( q ) ) < 0 )
goto usage;
}
else if( strcmp( p, "max_frag_len" ) == 0 )
{
if( strcmp( q, "512" ) == 0 )
opt.mfl_code = MBEDTLS_SSL_MAX_FRAG_LEN_512;
else if( strcmp( q, "1024" ) == 0 )
opt.mfl_code = MBEDTLS_SSL_MAX_FRAG_LEN_1024;
else if( strcmp( q, "2048" ) == 0 )
opt.mfl_code = MBEDTLS_SSL_MAX_FRAG_LEN_2048;
else if( strcmp( q, "4096" ) == 0 )
opt.mfl_code = MBEDTLS_SSL_MAX_FRAG_LEN_4096;
else
goto usage;
}
else if( strcmp( p, "alpn" ) == 0 )
{
opt.alpn_string = q;
}
else if( strcmp( p, "trunc_hmac" ) == 0 )
{
switch( atoi( q ) )
{
case 0: opt.trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_DISABLED; break;
case 1: opt.trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_ENABLED; break;
default: goto usage;
}
}
else if( strcmp( p, "extended_ms" ) == 0 )
{
switch( atoi( q ) )
{
case 0: opt.extended_ms = MBEDTLS_SSL_EXTENDED_MS_DISABLED; break;
case 1: opt.extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED; break;
default: goto usage;
}
}
else if( strcmp( p, "etm" ) == 0 )
{
switch( atoi( q ) )
{
case 0: opt.etm = MBEDTLS_SSL_ETM_DISABLED; break;
case 1: opt.etm = MBEDTLS_SSL_ETM_ENABLED; break;
default: goto usage;
}
}
else if( strcmp( p, "tickets" ) == 0 )
{
opt.tickets = atoi( q );
if( opt.tickets < 0 || opt.tickets > 1 )
goto usage;
}
else if( strcmp( p, "ticket_timeout" ) == 0 )
{
opt.ticket_timeout = atoi( q );
if( opt.ticket_timeout < 0 )
goto usage;
}
else if( strcmp( p, "cache_max" ) == 0 )
{
opt.cache_max = atoi( q );
if( opt.cache_max < 0 )
goto usage;
}
else if( strcmp( p, "cache_timeout" ) == 0 )
{
opt.cache_timeout = atoi( q );
if( opt.cache_timeout < 0 )
goto usage;
}
else if( strcmp( p, "cookies" ) == 0 )
{
opt.cookies = atoi( q );
if( opt.cookies < -1 || opt.cookies > 1)
goto usage;
}
else if( strcmp( p, "anti_replay" ) == 0 )
{
opt.anti_replay = atoi( q );
if( opt.anti_replay < 0 || opt.anti_replay > 1)
goto usage;
}
else if( strcmp( p, "badmac_limit" ) == 0 )
{
opt.badmac_limit = atoi( q );
if( opt.badmac_limit < 0 )
goto usage;
}
else if( strcmp( p, "hs_timeout" ) == 0 )
{
if( ( p = strchr( q, '-' ) ) == NULL )
goto usage;
*p++ = '\0';
opt.hs_to_min = atoi( q );
opt.hs_to_max = atoi( p );
if( opt.hs_to_min == 0 || opt.hs_to_max < opt.hs_to_min )
goto usage;
}
else if( strcmp( p, "sni" ) == 0 )
{
opt.sni = q;
}
else
goto usage;
}
#if defined(MBEDTLS_DEBUG_C)
mbedtls_debug_set_threshold( opt.debug_level );
#endif
if( opt.force_ciphersuite[0] > 0 )
{
const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( opt.force_ciphersuite[0] );
if( opt.max_version != -1 &&
ciphersuite_info->min_minor_ver > opt.max_version )
{
mbedtls_printf("forced ciphersuite not allowed with this protocol version\n");
ret = 2;
goto usage;
}
if( opt.min_version != -1 &&
ciphersuite_info->max_minor_ver < opt.min_version )
{
mbedtls_printf("forced ciphersuite not allowed with this protocol version\n");
ret = 2;
goto usage;
}
/* If we select a version that's not supported by
* this suite, then there will be no common ciphersuite... */
if( opt.max_version == -1 ||
opt.max_version > ciphersuite_info->max_minor_ver )
{
opt.max_version = ciphersuite_info->max_minor_ver;
}
if( opt.min_version < ciphersuite_info->min_minor_ver )
{
opt.min_version = ciphersuite_info->min_minor_ver;
/* DTLS starts with TLS 1.1 */
if( opt.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
opt.min_version < MBEDTLS_SSL_MINOR_VERSION_2 )
opt.min_version = MBEDTLS_SSL_MINOR_VERSION_2;
}
/* Enable RC4 if needed and not explicitly disabled */
if( ciphersuite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
{
if( opt.arc4 == MBEDTLS_SSL_ARC4_DISABLED )
{
mbedtls_printf("forced RC4 ciphersuite with RC4 disabled\n");
ret = 2;
goto usage;
}
opt.arc4 = MBEDTLS_SSL_ARC4_ENABLED;
}
}
if( opt.version_suites != NULL )
{
const char *name[4] = { 0 };
/* Parse 4-element coma-separated list */
for( i = 0, p = (char *) opt.version_suites;
i < 4 && *p != '\0';
i++ )
{
name[i] = p;
/* Terminate the current string and move on to next one */
while( *p != ',' && *p != '\0' )
p++;
if( *p == ',' )
*p++ = '\0';
}
if( i != 4 )
{
mbedtls_printf( "too few values for version_suites\n" );
ret = 1;
goto exit;
}
memset( version_suites, 0, sizeof( version_suites ) );
/* Get the suites identifiers from their name */
for( i = 0; i < 4; i++ )
{
version_suites[i][0] = mbedtls_ssl_get_ciphersuite_id( name[i] );
if( version_suites[i][0] == 0 )
{
mbedtls_printf( "unknown ciphersuite: '%s'\n", name[i] );
ret = 2;
goto usage;
}
}
}
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
/*
* Unhexify the pre-shared key and parse the list if any given
*/
if( unhexify( psk, opt.psk, &psk_len ) != 0 )
{
mbedtls_printf( "pre-shared key not valid hex\n" );
goto exit;
}
if( opt.psk_list != NULL )
{
if( ( psk_info = psk_parse( opt.psk_list ) ) == NULL )
{
mbedtls_printf( "psk_list invalid" );
goto exit;
}
}
#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
#if defined(MBEDTLS_SSL_ALPN)
if( opt.alpn_string != NULL )
{
p = (char *) opt.alpn_string;
i = 0;
/* Leave room for a final NULL in alpn_list */
while( i < (int) sizeof alpn_list - 1 && *p != '\0' )
{
alpn_list[i++] = p;
/* Terminate the current string and move on to next one */
while( *p != ',' && *p != '\0' )
p++;
if( *p == ',' )
*p++ = '\0';
}
}
#endif /* MBEDTLS_SSL_ALPN */
/*
* 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 -0x%x\n", -ret );
goto exit;
}
mbedtls_printf( " ok\n" );
#if defined(MBEDTLS_X509_CRT_PARSE_C)
/*
* 1.1. Load the trusted CA
*/
mbedtls_printf( " . Loading the CA root certificate ..." );
fflush( stdout );
#if defined(MBEDTLS_FS_IO)
if( strlen( opt.ca_path ) )
if( strcmp( opt.ca_path, "none" ) == 0 )
ret = 0;
else
ret = mbedtls_x509_crt_parse_path( &cacert, opt.ca_path );
else if( strlen( opt.ca_file ) )
if( strcmp( opt.ca_file, "none" ) == 0 )
ret = 0;
else
ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file );
else
#endif
#if defined(MBEDTLS_CERTS_C)
for( i = 0; mbedtls_test_cas[i] != NULL; i++ )
{
ret = mbedtls_x509_crt_parse( &cacert,
(const unsigned char *) mbedtls_test_cas[i],
mbedtls_test_cas_len[i] );
if( ret != 0 )
break;
}
#else
{
ret = 1;
mbedtls_printf("MBEDTLS_CERTS_C not defined.");
}
#endif
if( ret < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned -0x%x\n\n", -ret );
goto exit;
}
mbedtls_printf( " ok (%d skipped)\n", ret );
/*
* 1.2. Load own certificate and private key
*/
mbedtls_printf( " . Loading the server cert. and key..." );
fflush( stdout );
#if defined(MBEDTLS_FS_IO)
if( strlen( opt.crt_file ) && strcmp( opt.crt_file, "none" ) != 0 )
{
key_cert_init++;
if( ( ret = mbedtls_x509_crt_parse_file( &srvcert, opt.crt_file ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse_file returned -0x%x\n\n",
-ret );
goto exit;
}
}
if( strlen( opt.key_file ) && strcmp( opt.key_file, "none" ) != 0 )
{
key_cert_init++;
if( ( ret = mbedtls_pk_parse_keyfile( &pkey, opt.key_file, "" ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile returned -0x%x\n\n", -ret );
goto exit;
}
}
if( key_cert_init == 1 )
{
mbedtls_printf( " failed\n ! crt_file without key_file or vice-versa\n\n" );
goto exit;
}
if( strlen( opt.crt_file2 ) && strcmp( opt.crt_file2, "none" ) != 0 )
{
key_cert_init2++;
if( ( ret = mbedtls_x509_crt_parse_file( &srvcert2, opt.crt_file2 ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse_file(2) returned -0x%x\n\n",
-ret );
goto exit;
}
}
if( strlen( opt.key_file2 ) && strcmp( opt.key_file2, "none" ) != 0 )
{
key_cert_init2++;
if( ( ret = mbedtls_pk_parse_keyfile( &pkey2, opt.key_file2, "" ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile(2) returned -0x%x\n\n",
-ret );
goto exit;
}
}
if( key_cert_init2 == 1 )
{
mbedtls_printf( " failed\n ! crt_file2 without key_file2 or vice-versa\n\n" );
goto exit;
}
#endif
if( key_cert_init == 0 &&
strcmp( opt.crt_file, "none" ) != 0 &&
strcmp( opt.key_file, "none" ) != 0 &&
key_cert_init2 == 0 &&
strcmp( opt.crt_file2, "none" ) != 0 &&
strcmp( opt.key_file2, "none" ) != 0 )
{
#if !defined(MBEDTLS_CERTS_C)
mbedtls_printf( "Not certificated or key provided, and \n"
"MBEDTLS_CERTS_C not defined!\n" );
goto exit;
#else
#if defined(MBEDTLS_RSA_C)
if( ( ret = mbedtls_x509_crt_parse( &srvcert,
(const unsigned char *) mbedtls_test_srv_crt_rsa,
mbedtls_test_srv_crt_rsa_len ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_x509_crt_parse returned -0x%x\n\n", -ret );
goto exit;
}
if( ( ret = mbedtls_pk_parse_key( &pkey,
(const unsigned char *) mbedtls_test_srv_key_rsa,
mbedtls_test_srv_key_rsa_len, NULL, 0 ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_key returned -0x%x\n\n", -ret );
goto exit;
}
key_cert_init = 2;
#endif /* MBEDTLS_RSA_C */
#if defined(MBEDTLS_ECDSA_C)
if( ( ret = mbedtls_x509_crt_parse( &srvcert2,
(const unsigned char *) mbedtls_test_srv_crt_ec,
mbedtls_test_srv_crt_ec_len ) ) != 0 )
{
mbedtls_printf( " failed\n ! x509_crt_parse2 returned -0x%x\n\n", -ret );
goto exit;
}
if( ( ret = mbedtls_pk_parse_key( &pkey2,
(const unsigned char *) mbedtls_test_srv_key_ec,
mbedtls_test_srv_key_ec_len, NULL, 0 ) ) != 0 )
{
mbedtls_printf( " failed\n ! pk_parse_key2 returned -0x%x\n\n", -ret );
goto exit;
}
key_cert_init2 = 2;
#endif /* MBEDTLS_ECDSA_C */
#endif /* MBEDTLS_CERTS_C */
}
mbedtls_printf( " ok\n" );
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_FS_IO)
if( opt.dhm_file != NULL )
{
mbedtls_printf( " . Loading DHM parameters..." );
fflush( stdout );
if( ( ret = mbedtls_dhm_parse_dhmfile( &dhm, opt.dhm_file ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_dhm_parse_dhmfile returned -0x%04X\n\n",
-ret );
goto exit;
}
mbedtls_printf( " ok\n" );
}
#endif
#if defined(SNI_OPTION)
if( opt.sni != NULL )
{
mbedtls_printf( " . Setting up SNI information..." );
fflush( stdout );
if( ( sni_info = sni_parse( opt.sni ) ) == NULL )
{
mbedtls_printf( " failed\n" );
goto exit;
}
mbedtls_printf( " ok\n" );
}
#endif /* SNI_OPTION */
/*
* 2. Setup the listening TCP socket
*/
mbedtls_printf( " . Bind on %s://%s:%s/ ...",
opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM ? "tcp" : "udp",
opt.server_addr ? opt.server_addr : "*",
opt.server_port );
fflush( stdout );
if( ( ret = mbedtls_net_bind( &listen_fd, opt.server_addr, opt.server_port,
opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM ?
MBEDTLS_NET_PROTO_TCP : MBEDTLS_NET_PROTO_UDP ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_net_bind returned -0x%x\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_SERVER,
opt.transport,
MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_config_defaults returned -0x%x\n\n", -ret );
goto exit;
}
if( opt.auth_mode != DFL_AUTH_MODE )
mbedtls_ssl_conf_authmode( &conf, opt.auth_mode );
#if defined(MBEDTLS_SSL_PROTO_DTLS)
if( opt.hs_to_min != DFL_HS_TO_MIN || opt.hs_to_max != DFL_HS_TO_MAX )
mbedtls_ssl_conf_handshake_timeout( &conf, opt.hs_to_min, opt.hs_to_max );
#endif /* MBEDTLS_SSL_PROTO_DTLS */
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
if( ( ret = mbedtls_ssl_conf_max_frag_len( &conf, opt.mfl_code ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_max_frag_len returned %d\n\n", ret );
goto exit;
};
#endif
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
if( opt.trunc_hmac != DFL_TRUNC_HMAC )
mbedtls_ssl_conf_truncated_hmac( &conf, opt.trunc_hmac );
#endif
#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
if( opt.extended_ms != DFL_EXTENDED_MS )
mbedtls_ssl_conf_extended_master_secret( &conf, opt.extended_ms );
#endif
#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
if( opt.etm != DFL_ETM )
mbedtls_ssl_conf_encrypt_then_mac( &conf, opt.etm );
#endif
#if defined(MBEDTLS_SSL_ALPN)
if( opt.alpn_string != NULL )
if( ( ret = mbedtls_ssl_conf_alpn_protocols( &conf, alpn_list ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_alpn_protocols returned %d\n\n", ret );
goto exit;
}
#endif
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
#if defined(MBEDTLS_SSL_CACHE_C)
if( opt.cache_max != -1 )
mbedtls_ssl_cache_set_max_entries( &cache, opt.cache_max );
if( opt.cache_timeout != -1 )
mbedtls_ssl_cache_set_timeout( &cache, opt.cache_timeout );
mbedtls_ssl_conf_session_cache( &conf, &cache,
mbedtls_ssl_cache_get,
mbedtls_ssl_cache_set );
#endif
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
if( opt.tickets == MBEDTLS_SSL_SESSION_TICKETS_ENABLED )
{
if( ( ret = mbedtls_ssl_ticket_setup( &ticket_ctx,
mbedtls_ctr_drbg_random, &ctr_drbg,
MBEDTLS_CIPHER_AES_256_GCM,
opt.ticket_timeout ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_ticket_setup returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_conf_session_tickets_cb( &conf,
mbedtls_ssl_ticket_write,
mbedtls_ssl_ticket_parse,
&ticket_ctx );
}
#endif
#if defined(MBEDTLS_SSL_PROTO_DTLS)
if( opt.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
{
#if defined(MBEDTLS_SSL_COOKIE_C)
if( opt.cookies > 0 )
{
if( ( ret = mbedtls_ssl_cookie_setup( &cookie_ctx,
mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_cookie_setup returned %d\n\n", ret );
goto exit;
}
mbedtls_ssl_conf_dtls_cookies( &conf, mbedtls_ssl_cookie_write, mbedtls_ssl_cookie_check,
&cookie_ctx );
}
else
#endif /* MBEDTLS_SSL_COOKIE_C */
#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
if( opt.cookies == 0 )
{
mbedtls_ssl_conf_dtls_cookies( &conf, NULL, NULL, NULL );
}
else
#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY */
{
; /* Nothing to do */
}
#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
if( opt.anti_replay != DFL_ANTI_REPLAY )
mbedtls_ssl_conf_dtls_anti_replay( &conf, opt.anti_replay );
#endif
#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
if( opt.badmac_limit != DFL_BADMAC_LIMIT )
mbedtls_ssl_conf_dtls_badmac_limit( &conf, opt.badmac_limit );
#endif
}
#endif /* MBEDTLS_SSL_PROTO_DTLS */
if( opt.force_ciphersuite[0] != DFL_FORCE_CIPHER )
mbedtls_ssl_conf_ciphersuites( &conf, opt.force_ciphersuite );
#if defined(MBEDTLS_ARC4_C)
if( opt.arc4 != DFL_ARC4 )
mbedtls_ssl_conf_arc4_support( &conf, opt.arc4 );
#endif
if( opt.version_suites != NULL )
{
mbedtls_ssl_conf_ciphersuites_for_version( &conf, version_suites[0],
MBEDTLS_SSL_MAJOR_VERSION_3,
MBEDTLS_SSL_MINOR_VERSION_0 );
mbedtls_ssl_conf_ciphersuites_for_version( &conf, version_suites[1],
MBEDTLS_SSL_MAJOR_VERSION_3,
MBEDTLS_SSL_MINOR_VERSION_1 );
mbedtls_ssl_conf_ciphersuites_for_version( &conf, version_suites[2],
MBEDTLS_SSL_MAJOR_VERSION_3,
MBEDTLS_SSL_MINOR_VERSION_2 );
mbedtls_ssl_conf_ciphersuites_for_version( &conf, version_suites[3],
MBEDTLS_SSL_MAJOR_VERSION_3,
MBEDTLS_SSL_MINOR_VERSION_3 );
}
if( opt.allow_legacy != DFL_ALLOW_LEGACY )
mbedtls_ssl_conf_legacy_renegotiation( &conf, opt.allow_legacy );
#if defined(MBEDTLS_SSL_RENEGOTIATION)
mbedtls_ssl_conf_renegotiation( &conf, opt.renegotiation );
if( opt.renego_delay != DFL_RENEGO_DELAY )
mbedtls_ssl_conf_renegotiation_enforced( &conf, opt.renego_delay );
if( opt.renego_period != DFL_RENEGO_PERIOD )
{
renego_period[7] = opt.renego_period;
mbedtls_ssl_conf_renegotiation_period( &conf, renego_period );
}
#endif
#if defined(MBEDTLS_X509_CRT_PARSE_C)
if( strcmp( opt.ca_path, "none" ) != 0 &&
strcmp( opt.ca_file, "none" ) != 0 )
{
mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
}
if( key_cert_init )
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
if( key_cert_init2 )
if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert2, &pkey2 ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
goto exit;
}
#endif
#if defined(SNI_OPTION)
if( opt.sni != NULL )
mbedtls_ssl_conf_sni( &conf, sni_callback, sni_info );
#endif
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
if( strlen( opt.psk ) != 0 && strlen( opt.psk_identity ) != 0 )
{
ret = mbedtls_ssl_conf_psk( &conf, psk, psk_len,
(const unsigned char *) opt.psk_identity,
strlen( opt.psk_identity ) );
if( ret != 0 )
{
mbedtls_printf( " failed\n mbedtls_ssl_conf_psk returned -0x%04X\n\n", - ret );
goto exit;
}
}
if( opt.psk_list != NULL )
mbedtls_ssl_conf_psk_cb( &conf, psk_callback, psk_info );
#endif
#if defined(MBEDTLS_DHM_C)
/*
* Use different group than default DHM group
*/
#if defined(MBEDTLS_FS_IO)
if( opt.dhm_file != NULL )
ret = mbedtls_ssl_conf_dh_param_ctx( &conf, &dhm );
#endif
if( ret != 0 )
{
mbedtls_printf( " failed\n mbedtls_ssl_conf_dh_param returned -0x%04X\n\n", - ret );
goto exit;
}
#endif
if( opt.min_version != DFL_MIN_VERSION )
mbedtls_ssl_conf_min_version( &conf, MBEDTLS_SSL_MAJOR_VERSION_3, opt.min_version );
if( opt.max_version != DFL_MIN_VERSION )
mbedtls_ssl_conf_max_version( &conf, MBEDTLS_SSL_MAJOR_VERSION_3, opt.max_version );
if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_setup returned -0x%x\n\n", -ret );
goto exit;
}
if( opt.nbio == 2 )
mbedtls_ssl_set_bio( &ssl, &client_fd, my_send, my_recv, NULL );
else
mbedtls_ssl_set_bio( &ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv,
opt.nbio == 0 ? mbedtls_net_recv_timeout : NULL );
#if defined(MBEDTLS_TIMING_C)
mbedtls_ssl_set_timer_cb( &ssl, &timer, mbedtls_timing_set_delay,
mbedtls_timing_get_delay );
#endif
mbedtls_printf( " ok\n" );
reset:
#if !defined(_WIN32)
if( received_sigterm )
{
mbedtls_printf( " interrupted by SIGTERM\n" );
ret = 0;
goto exit;
}
#endif
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf );
}
#endif
mbedtls_net_free( &client_fd );
mbedtls_ssl_session_reset( &ssl );
/*
* 3. Wait until a client connects
*/
mbedtls_printf( " . Waiting for a remote connection ..." );
fflush( stdout );
if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
client_ip, sizeof( client_ip ), &cliip_len ) ) != 0 )
{
#if !defined(_WIN32)
if( received_sigterm )
{
mbedtls_printf( " interrupted by signal\n" );
ret = 0;
goto exit;
}
#endif
mbedtls_printf( " failed\n ! mbedtls_net_accept returned -0x%x\n\n", -ret );
goto exit;
}
if( opt.nbio > 0 )
ret = mbedtls_net_set_nonblock( &client_fd );
else
ret = mbedtls_net_set_block( &client_fd );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! net_set_(non)block() returned -0x%x\n\n", -ret );
goto exit;
}
mbedtls_ssl_conf_read_timeout( &conf, opt.read_timeout );
#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
if( opt.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
{
if( ( ret = mbedtls_ssl_set_client_transport_id( &ssl,
client_ip, cliip_len ) ) != 0 )
{
mbedtls_printf( " failed\n ! "
"mbedtls_ssl_set_client_transport_id() returned -0x%x\n\n", -ret );
goto exit;
}
}
#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY */
mbedtls_printf( " ok\n" );
/*
* 4. Handshake
*/
mbedtls_printf( " . Performing the SSL/TLS handshake..." );
fflush( stdout );
do ret = mbedtls_ssl_handshake( &ssl );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret == MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED )
{
mbedtls_printf( " hello verification requested\n" );
ret = 0;
goto reset;
}
else if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned -0x%x\n\n", -ret );
#if defined(MBEDTLS_X509_CRT_PARSE_C)
if( ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED )
{
char vrfy_buf[512];
uint32_t flags = mbedtls_ssl_get_verify_result( &ssl );
mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
mbedtls_printf( "%s\n", vrfy_buf );
}
#endif
goto reset;
}
else /* ret == 0 */
{
mbedtls_printf( " ok\n [ Protocol is %s ]\n [ Ciphersuite is %s ]\n",
mbedtls_ssl_get_version( &ssl ), mbedtls_ssl_get_ciphersuite( &ssl ) );
}
if( ( ret = mbedtls_ssl_get_record_expansion( &ssl ) ) >= 0 )
mbedtls_printf( " [ Record expansion is %d ]\n", ret );
else
mbedtls_printf( " [ Record expansion is unknown (compression) ]\n" );
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
mbedtls_printf( " [ Maximum fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_max_frag_len( &ssl ) );
#endif
#if defined(MBEDTLS_SSL_ALPN)
if( opt.alpn_string != NULL )
{
const char *alp = mbedtls_ssl_get_alpn_protocol( &ssl );
mbedtls_printf( " [ Application Layer Protocol is %s ]\n",
alp ? alp : "(none)" );
}
#endif
#if defined(MBEDTLS_X509_CRT_PARSE_C)
/*
* 5. Verify the server certificate
*/
mbedtls_printf( " . Verifying peer X.509 certificate..." );
if( ( flags = mbedtls_ssl_get_verify_result( &ssl ) ) != 0 )
{
char vrfy_buf[512];
mbedtls_printf( " failed\n" );
mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), " ! ", flags );
mbedtls_printf( "%s\n", vrfy_buf );
}
else
mbedtls_printf( " ok\n" );
if( mbedtls_ssl_get_peer_cert( &ssl ) != NULL )
{
char crt_buf[512];
mbedtls_printf( " . Peer certificate information ...\n" );
mbedtls_x509_crt_info( crt_buf, sizeof( crt_buf ), " ",
mbedtls_ssl_get_peer_cert( &ssl ) );
mbedtls_printf( "%s\n", crt_buf );
}
#endif /* MBEDTLS_X509_CRT_PARSE_C */
if( opt.exchanges == 0 )
goto close_notify;
exchanges_left = opt.exchanges;
data_exchange:
/*
* 6. Read the HTTP Request
*/
mbedtls_printf( " < Read from client:" );
fflush( stdout );
/*
* TLS and DTLS need different reading styles (stream vs datagram)
*/
if( opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM )
{
do
{
int terminated = 0;
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
ret = mbedtls_ssl_read( &ssl, buf, len );
if( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE )
continue;
if( ret <= 0 )
{
switch( ret )
{
case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
mbedtls_printf( " connection was closed gracefully\n" );
goto close_notify;
case 0:
case MBEDTLS_ERR_NET_CONN_RESET:
mbedtls_printf( " connection was reset by peer\n" );
ret = MBEDTLS_ERR_NET_CONN_RESET;
goto reset;
default:
mbedtls_printf( " mbedtls_ssl_read returned -0x%x\n", -ret );
goto reset;
}
}
if( mbedtls_ssl_get_bytes_avail( &ssl ) == 0 )
{
len = ret;
buf[len] = '\0';
mbedtls_printf( " %d bytes read\n\n%s\n", len, (char *) buf );
/* End of message should be detected according to the syntax of the
* application protocol (eg HTTP), just use a dummy test here. */
if( buf[len - 1] == '\n' )
terminated = 1;
}
else
{
int extra_len, ori_len;
unsigned char *larger_buf;
ori_len = ret;
extra_len = (int) mbedtls_ssl_get_bytes_avail( &ssl );
larger_buf = mbedtls_calloc( 1, ori_len + extra_len + 1 );
if( larger_buf == NULL )
{
mbedtls_printf( " ! memory allocation failed\n" );
ret = 1;
goto reset;
}
memset( larger_buf, 0, ori_len + extra_len );
memcpy( larger_buf, buf, ori_len );
/* This read should never fail and get the whole cached data */
ret = mbedtls_ssl_read( &ssl, larger_buf + ori_len, extra_len );
if( ret != extra_len ||
mbedtls_ssl_get_bytes_avail( &ssl ) != 0 )
{
mbedtls_printf( " ! mbedtls_ssl_read failed on cached data\n" );
ret = 1;
goto reset;
}
larger_buf[ori_len + extra_len] = '\0';
mbedtls_printf( " %u bytes read (%u + %u)\n\n%s\n",
ori_len + extra_len, ori_len, extra_len,
(char *) larger_buf );
/* End of message should be detected according to the syntax of the
* application protocol (eg HTTP), just use a dummy test here. */
if( larger_buf[ori_len + extra_len - 1] == '\n' )
terminated = 1;
mbedtls_free( larger_buf );
}
if( terminated )
{
ret = 0;
break;
}
}
while( 1 );
}
else /* Not stream, so datagram */
{
len = sizeof( buf ) - 1;
memset( buf, 0, sizeof( buf ) );
do ret = mbedtls_ssl_read( &ssl, buf, len );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret <= 0 )
{
switch( ret )
{
case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
mbedtls_printf( " connection was closed gracefully\n" );
ret = 0;
goto close_notify;
default:
mbedtls_printf( " mbedtls_ssl_read returned -0x%x\n", -ret );
goto reset;
}
}
len = ret;
buf[len] = '\0';
mbedtls_printf( " %d bytes read\n\n%s", len, (char *) buf );
ret = 0;
}
/*
* 7a. Request renegotiation while client is waiting for input from us.
* (only on the first exchange, to be able to test retransmission)
*/
#if defined(MBEDTLS_SSL_RENEGOTIATION)
if( opt.renegotiate && exchanges_left == opt.exchanges )
{
mbedtls_printf( " . Requestion renegotiation..." );
fflush( stdout );
while( ( ret = mbedtls_ssl_renegotiate( &ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_renegotiate returned %d\n\n", ret );
goto reset;
}
}
mbedtls_printf( " ok\n" );
}
#endif /* MBEDTLS_SSL_RENEGOTIATION */
/*
* 7. Write the 200 Response
*/
mbedtls_printf( " > Write to client:" );
fflush( stdout );
len = sprintf( (char *) buf, HTTP_RESPONSE,
mbedtls_ssl_get_ciphersuite( &ssl ) );
if( opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM )
{
for( written = 0, frags = 0; written < len; written += ret, frags++ )
{
while( ( ret = mbedtls_ssl_write( &ssl, buf + written, len - written ) )
<= 0 )
{
if( ret == MBEDTLS_ERR_NET_CONN_RESET )
{
mbedtls_printf( " failed\n ! peer closed the connection\n\n" );
goto reset;
}
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 );
goto reset;
}
}
}
}
else /* Not stream, so datagram */
{
do ret = mbedtls_ssl_write( &ssl, buf, len );
while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
ret == MBEDTLS_ERR_SSL_WANT_WRITE );
if( ret < 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_write returned %d\n\n", ret );
goto reset;
}
frags = 1;
written = ret;
}
buf[written] = '\0';
mbedtls_printf( " %d bytes written in %d fragments\n\n%s\n", written, frags, (char *) buf );
ret = 0;
/*
* 7b. Continue doing data exchanges?
*/
if( --exchanges_left > 0 )
goto data_exchange;
/*
* 8. Done, cleanly close the connection
*/
close_notify:
mbedtls_printf( " . Closing the connection..." );
/* No error checking, the connection might be closed already */
do ret = mbedtls_ssl_close_notify( &ssl );
while( ret == MBEDTLS_ERR_SSL_WANT_WRITE );
ret = 0;
mbedtls_printf( " done\n" );
goto reset;
/*
* Cleanup and exit
*/
exit:
#ifdef MBEDTLS_ERROR_C
if( ret != 0 )
{
char error_buf[100];
mbedtls_strerror( ret, error_buf, 100 );
mbedtls_printf("Last error was: -0x%X - %s\n\n", -ret, error_buf );
}
#endif
mbedtls_printf( " . Cleaning up..." );
fflush( stdout );
mbedtls_net_free( &client_fd );
mbedtls_net_free( &listen_fd );
#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_FS_IO)
mbedtls_dhm_free( &dhm );
#endif
#if defined(MBEDTLS_X509_CRT_PARSE_C)
mbedtls_x509_crt_free( &cacert );
mbedtls_x509_crt_free( &srvcert );
mbedtls_pk_free( &pkey );
mbedtls_x509_crt_free( &srvcert2 );
mbedtls_pk_free( &pkey2 );
#endif
#if defined(SNI_OPTION)
sni_free( sni_info );
#endif
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
psk_free( psk_info );
#endif
#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_FS_IO)
mbedtls_dhm_free( &dhm );
#endif
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_free( &cache );
#endif
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
mbedtls_ssl_ticket_free( &ticket_ctx );
#endif
#if defined(MBEDTLS_SSL_COOKIE_C)
mbedtls_ssl_cookie_free( &cookie_ctx );
#endif
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
#if defined(MBEDTLS_MEMORY_DEBUG)
mbedtls_memory_buffer_alloc_status();
#endif
mbedtls_memory_buffer_alloc_free();
#endif
mbedtls_printf( " done.\n" );
#if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
// Shell can not handle large exit numbers -> 1 for errors
if( ret < 0 )
ret = 1;
return( ret );
}
#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C &&
MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C && MBEDTLS_RSA_C &&
MBEDTLS_CTR_DRBG_C */
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