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mbedtls/library/ssl_cli.c

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/*
* SSLv3/TLSv1 client-side functions
*
* Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
*
* Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot 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.
*/
#include "polarssl/config.h"
#if defined(POLARSSL_SSL_CLI_C)
#include "polarssl/debug.h"
#include "polarssl/ssl.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
static int ssl_write_client_hello( ssl_context *ssl )
{
int ret, i, n;
unsigned char *buf;
unsigned char *p;
time_t t;
SSL_DEBUG_MSG( 2, ( "=> write client hello" ) );
ssl->major_ver = SSL_MAJOR_VERSION_3;
ssl->minor_ver = SSL_MINOR_VERSION_0;
ssl->max_major_ver = SSL_MAJOR_VERSION_3;
ssl->max_minor_ver = SSL_MINOR_VERSION_1;
/*
* 0 . 0 handshake type
* 1 . 3 handshake length
* 4 . 5 highest version supported
* 6 . 9 current UNIX time
* 10 . 37 random bytes
*/
buf = ssl->out_msg;
p = buf + 4;
*p++ = (unsigned char) ssl->max_major_ver;
*p++ = (unsigned char) ssl->max_minor_ver;
SSL_DEBUG_MSG( 3, ( "client hello, max version: [%d:%d]",
buf[4], buf[5] ) );
t = time( NULL );
*p++ = (unsigned char)( t >> 24 );
*p++ = (unsigned char)( t >> 16 );
*p++ = (unsigned char)( t >> 8 );
*p++ = (unsigned char)( t );
SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) );
for( i = 28; i > 0; i-- )
*p++ = (unsigned char) ssl->f_rng( ssl->p_rng );
memcpy( ssl->randbytes, buf + 6, 32 );
SSL_DEBUG_BUF( 3, "client hello, random bytes", buf + 6, 32 );
/*
* 38 . 38 session id length
* 39 . 39+n session id
* 40+n . 41+n cipherlist length
* 42+n . .. cipherlist
* .. . .. compression alg. (0)
* .. . .. extensions (unused)
*/
n = ssl->session->length;
if( n < 16 || n > 32 || ssl->resume == 0 ||
t - ssl->session->start > ssl->timeout )
n = 0;
*p++ = (unsigned char) n;
for( i = 0; i < n; i++ )
*p++ = ssl->session->id[i];
SSL_DEBUG_MSG( 3, ( "client hello, session id len.: %d", n ) );
SSL_DEBUG_BUF( 3, "client hello, session id", buf + 39, n );
for( n = 0; ssl->ciphers[n] != 0; n++ );
*p++ = (unsigned char)( n >> 7 );
*p++ = (unsigned char)( n << 1 );
SSL_DEBUG_MSG( 3, ( "client hello, got %d ciphers", n ) );
for( i = 0; i < n; i++ )
{
SSL_DEBUG_MSG( 3, ( "client hello, add cipher: %2d",
ssl->ciphers[i] ) );
*p++ = (unsigned char)( ssl->ciphers[i] >> 8 );
*p++ = (unsigned char)( ssl->ciphers[i] );
}
SSL_DEBUG_MSG( 3, ( "client hello, compress len.: %d", 1 ) );
SSL_DEBUG_MSG( 3, ( "client hello, compress alg.: %d", 0 ) );
*p++ = 1;
*p++ = SSL_COMPRESS_NULL;
if ( ssl->hostname != NULL )
{
SSL_DEBUG_MSG( 3, ( "client hello, server name extension: %s",
ssl->hostname ) );
*p++ = (unsigned char)( ( (ssl->hostname_len + 9) >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( (ssl->hostname_len + 9) ) & 0xFF );
*p++ = (unsigned char)( ( TLS_EXT_SERVERNAME >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( TLS_EXT_SERVERNAME ) & 0xFF );
*p++ = (unsigned char)( ( (ssl->hostname_len + 5) >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( (ssl->hostname_len + 5) ) & 0xFF );
*p++ = (unsigned char)( ( (ssl->hostname_len + 3) >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( (ssl->hostname_len + 3) ) & 0xFF );
*p++ = (unsigned char)( ( TLS_EXT_SERVERNAME_HOSTNAME ) & 0xFF );
*p++ = (unsigned char)( ( ssl->hostname_len >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( ssl->hostname_len ) & 0xFF );
memcpy( p, ssl->hostname, ssl->hostname_len );
p += ssl->hostname_len;
}
ssl->out_msglen = p - buf;
ssl->out_msgtype = SSL_MSG_HANDSHAKE;
ssl->out_msg[0] = SSL_HS_CLIENT_HELLO;
ssl->state++;
if( ( ret = ssl_write_record( ssl ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ssl_write_record", ret );
return( ret );
}
SSL_DEBUG_MSG( 2, ( "<= write client hello" ) );
return( 0 );
}
static int ssl_parse_server_hello( ssl_context *ssl )
{
time_t t;
int ret, i, n;
int ext_len;
unsigned char *buf;
SSL_DEBUG_MSG( 2, ( "=> parse server hello" ) );
/*
* 0 . 0 handshake type
* 1 . 3 handshake length
* 4 . 5 protocol version
* 6 . 9 UNIX time()
* 10 . 37 random bytes
*/
buf = ssl->in_msg;
if( ( ret = ssl_read_record( ssl ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ssl_read_record", ret );
return( ret );
}
if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
{
SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
}
SSL_DEBUG_MSG( 3, ( "server hello, chosen version: [%d:%d]",
buf[4], buf[5] ) );
if( ssl->in_hslen < 42 ||
buf[0] != SSL_HS_SERVER_HELLO ||
buf[4] != SSL_MAJOR_VERSION_3 )
{
SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
}
if( buf[5] != SSL_MINOR_VERSION_0 &&
buf[5] != SSL_MINOR_VERSION_1 )
{
SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
}
ssl->minor_ver = buf[5];
t = ( (time_t) buf[6] << 24 )
| ( (time_t) buf[7] << 16 )
| ( (time_t) buf[8] << 8 )
| ( (time_t) buf[9] );
memcpy( ssl->randbytes + 32, buf + 6, 32 );
n = buf[38];
SSL_DEBUG_MSG( 3, ( "server hello, current time: %lu", t ) );
SSL_DEBUG_BUF( 3, "server hello, random bytes", buf + 6, 32 );
/*
* 38 . 38 session id length
* 39 . 38+n session id
* 39+n . 40+n chosen cipher
* 41+n . 41+n chosen compression alg.
* 42+n . 43+n extensions length
* 44+n . 44+n+m extensions
*/
if( n < 0 || n > 32 || ssl->in_hslen > 42 + n )
{
ext_len = ( ( buf[42 + n] << 8 )
| ( buf[43 + n] ) ) + 2;
}
else
{
ext_len = 0;
}
if( n < 0 || n > 32 || ssl->in_hslen != 42 + n + ext_len )
{
SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
}
i = ( buf[39 + n] << 8 ) | buf[40 + n];
SSL_DEBUG_MSG( 3, ( "server hello, session id len.: %d", n ) );
SSL_DEBUG_BUF( 3, "server hello, session id", buf + 39, n );
/*
* Check if the session can be resumed
*/
if( ssl->resume == 0 || n == 0 ||
ssl->session->cipher != i ||
ssl->session->length != n ||
memcmp( ssl->session->id, buf + 39, n ) != 0 )
{
ssl->state++;
ssl->resume = 0;
ssl->session->start = time( NULL );
ssl->session->cipher = i;
ssl->session->length = n;
memcpy( ssl->session->id, buf + 39, n );
}
else
{
ssl->state = SSL_SERVER_CHANGE_CIPHER_SPEC;
ssl_derive_keys( ssl );
}
SSL_DEBUG_MSG( 3, ( "%s session has been resumed",
ssl->resume ? "a" : "no" ) );
SSL_DEBUG_MSG( 3, ( "server hello, chosen cipher: %d", i ) );
SSL_DEBUG_MSG( 3, ( "server hello, compress alg.: %d", buf[41 + n] ) );
i = 0;
while( 1 )
{
if( ssl->ciphers[i] == 0 )
{
SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
}
if( ssl->ciphers[i++] == ssl->session->cipher )
break;
}
if( buf[41 + n] != SSL_COMPRESS_NULL )
{
SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
}
/* TODO: Process extensions */
SSL_DEBUG_MSG( 2, ( "<= parse server hello" ) );
return( 0 );
}
static int ssl_parse_server_key_exchange( ssl_context *ssl )
{
int ret, n;
unsigned char *p, *end;
unsigned char hash[36];
md5_context md5;
sha1_context sha1;
SSL_DEBUG_MSG( 2, ( "=> parse server key exchange" ) );
if( ssl->session->cipher != SSL_EDH_RSA_DES_168_SHA &&
ssl->session->cipher != SSL_EDH_RSA_AES_256_SHA &&
ssl->session->cipher != SSL_EDH_RSA_CAMELLIA_256_SHA)
{
SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
ssl->state++;
return( 0 );
}
#if !defined(POLARSSL_DHM_C)
SSL_DEBUG_MSG( 1, ( "support for dhm in not available" ) );
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
#else
if( ( ret = ssl_read_record( ssl ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ssl_read_record", ret );
return( ret );
}
if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
{
SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
}
if( ssl->in_msg[0] != SSL_HS_SERVER_KEY_EXCHANGE )
{
SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
}
/*
* Ephemeral DH parameters:
*
* struct {
* opaque dh_p<1..2^16-1>;
* opaque dh_g<1..2^16-1>;
* opaque dh_Ys<1..2^16-1>;
* } ServerDHParams;
*/
p = ssl->in_msg + 4;
end = ssl->in_msg + ssl->in_hslen;
if( ( ret = dhm_read_params( &ssl->dhm_ctx, &p, end ) ) != 0 )
{
SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
}
if( (int)( end - p ) != ssl->peer_cert->rsa.len )
{
SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
}
if( ssl->dhm_ctx.len < 64 || ssl->dhm_ctx.len > 256 )
{
SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
}
SSL_DEBUG_MPI( 3, "DHM: P ", &ssl->dhm_ctx.P );
SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->dhm_ctx.G );
SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->dhm_ctx.GY );
/*
* digitally-signed struct {
* opaque md5_hash[16];
* opaque sha_hash[20];
* };
*
* md5_hash
* MD5(ClientHello.random + ServerHello.random
* + ServerParams);
* sha_hash
* SHA(ClientHello.random + ServerHello.random
* + ServerParams);
*/
n = ssl->in_hslen - ( end - p ) - 6;
md5_starts( &md5 );
md5_update( &md5, ssl->randbytes, 64 );
md5_update( &md5, ssl->in_msg + 4, n );
md5_finish( &md5, hash );
sha1_starts( &sha1 );
sha1_update( &sha1, ssl->randbytes, 64 );
sha1_update( &sha1, ssl->in_msg + 4, n );
sha1_finish( &sha1, hash + 16 );
SSL_DEBUG_BUF( 3, "parameters hash", hash, 36 );
if( ( ret = rsa_pkcs1_verify( &ssl->peer_cert->rsa, RSA_PUBLIC,
RSA_RAW, 36, hash, p ) ) != 0 )
{
SSL_DEBUG_RET( 1, "rsa_pkcs1_verify", ret );
return( ret );
}
ssl->state++;
SSL_DEBUG_MSG( 2, ( "<= parse server key exchange" ) );
return( 0 );
#endif
}
static int ssl_parse_certificate_request( ssl_context *ssl )
{
int ret;
SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
/*
* 0 . 0 handshake type
* 1 . 3 handshake length
* 4 . 5 SSL version
* 6 . 6 cert type count
* 7 .. n-1 cert types
* n .. n+1 length of all DNs
* n+2 .. n+3 length of DN 1
* n+4 .. ... Distinguished Name #1
* ... .. ... length of DN 2, etc.
*/
if( ( ret = ssl_read_record( ssl ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ssl_read_record", ret );
return( ret );
}
if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
{
SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
}
ssl->client_auth = 0;
ssl->state++;
if( ssl->in_msg[0] == SSL_HS_CERTIFICATE_REQUEST )
ssl->client_auth++;
SSL_DEBUG_MSG( 3, ( "got %s certificate request",
ssl->client_auth ? "a" : "no" ) );
SSL_DEBUG_MSG( 2, ( "<= parse certificate request" ) );
return( 0 );
}
static int ssl_parse_server_hello_done( ssl_context *ssl )
{
int ret;
SSL_DEBUG_MSG( 2, ( "=> parse server hello done" ) );
if( ssl->client_auth != 0 )
{
if( ( ret = ssl_read_record( ssl ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ssl_read_record", ret );
return( ret );
}
if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
{
SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
}
}
if( ssl->in_hslen != 4 ||
ssl->in_msg[0] != SSL_HS_SERVER_HELLO_DONE )
{
SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO_DONE );
}
ssl->state++;
SSL_DEBUG_MSG( 2, ( "<= parse server hello done" ) );
return( 0 );
}
static int ssl_write_client_key_exchange( ssl_context *ssl )
{
int ret, i, n;
SSL_DEBUG_MSG( 2, ( "=> write client key exchange" ) );
if( ssl->session->cipher == SSL_EDH_RSA_DES_168_SHA ||
ssl->session->cipher == SSL_EDH_RSA_AES_256_SHA ||
ssl->session->cipher == SSL_EDH_RSA_CAMELLIA_256_SHA)
{
#if !defined(POLARSSL_DHM_C)
SSL_DEBUG_MSG( 1, ( "support for dhm in not available" ) );
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
#else
/*
* DHM key exchange -- send G^X mod P
*/
n = ssl->dhm_ctx.len;
ssl->out_msg[4] = (unsigned char)( n >> 8 );
ssl->out_msg[5] = (unsigned char)( n );
i = 6;
ret = dhm_make_public( &ssl->dhm_ctx, 256,
&ssl->out_msg[i], n,
ssl->f_rng, ssl->p_rng );
if( ret != 0 )
{
SSL_DEBUG_RET( 1, "dhm_make_public", ret );
return( ret );
}
SSL_DEBUG_MPI( 3, "DHM: X ", &ssl->dhm_ctx.X );
SSL_DEBUG_MPI( 3, "DHM: GX", &ssl->dhm_ctx.GX );
ssl->pmslen = ssl->dhm_ctx.len;
if( ( ret = dhm_calc_secret( &ssl->dhm_ctx,
ssl->premaster,
&ssl->pmslen ) ) != 0 )
{
SSL_DEBUG_RET( 1, "dhm_calc_secret", ret );
return( ret );
}
SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->dhm_ctx.K );
#endif
}
else
{
/*
* RSA key exchange -- send rsa_public(pkcs1 v1.5(premaster))
*/
ssl->premaster[0] = (unsigned char) ssl->max_major_ver;
ssl->premaster[1] = (unsigned char) ssl->max_minor_ver;
ssl->pmslen = 48;
for( i = 2; i < ssl->pmslen; i++ )
ssl->premaster[i] = (unsigned char) ssl->f_rng( ssl->p_rng );
i = 4;
n = ssl->peer_cert->rsa.len;
if( ssl->minor_ver != SSL_MINOR_VERSION_0 )
{
i += 2;
ssl->out_msg[4] = (unsigned char)( n >> 8 );
ssl->out_msg[5] = (unsigned char)( n );
}
ret = rsa_pkcs1_encrypt( &ssl->peer_cert->rsa, RSA_PUBLIC,
ssl->pmslen, ssl->premaster,
ssl->out_msg + i );
if( ret != 0 )
{
SSL_DEBUG_RET( 1, "rsa_pkcs1_encrypt", ret );
return( ret );
}
}
ssl_derive_keys( ssl );
ssl->out_msglen = i + n;
ssl->out_msgtype = SSL_MSG_HANDSHAKE;
ssl->out_msg[0] = SSL_HS_CLIENT_KEY_EXCHANGE;
ssl->state++;
if( ( ret = ssl_write_record( ssl ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ssl_write_record", ret );
return( ret );
}
SSL_DEBUG_MSG( 2, ( "<= write client key exchange" ) );
return( 0 );
}
static int ssl_write_certificate_verify( ssl_context *ssl )
{
int ret, n;
unsigned char hash[36];
SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
if( ssl->client_auth == 0 )
{
SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
ssl->state++;
return( 0 );
}
if( ssl->rsa_key == NULL )
{
SSL_DEBUG_MSG( 1, ( "got no private key" ) );
return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED );
}
/*
* Make an RSA signature of the handshake digests
*/
ssl_calc_verify( ssl, hash );
n = ssl->rsa_key->len;
ssl->out_msg[4] = (unsigned char)( n >> 8 );
ssl->out_msg[5] = (unsigned char)( n );
if( ( ret = rsa_pkcs1_sign( ssl->rsa_key, RSA_PRIVATE, RSA_RAW,
36, hash, ssl->out_msg + 6 ) ) != 0 )
{
SSL_DEBUG_RET( 1, "rsa_pkcs1_sign", ret );
return( ret );
}
ssl->out_msglen = 6 + n;
ssl->out_msgtype = SSL_MSG_HANDSHAKE;
ssl->out_msg[0] = SSL_HS_CERTIFICATE_VERIFY;
ssl->state++;
if( ( ret = ssl_write_record( ssl ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ssl_write_record", ret );
return( ret );
}
SSL_DEBUG_MSG( 2, ( "<= write certificate verify" ) );
return( 0 );
}
/*
* SSL handshake -- client side
*/
int ssl_handshake_client( ssl_context *ssl )
{
int ret = 0;
SSL_DEBUG_MSG( 2, ( "=> handshake client" ) );
while( ssl->state != SSL_HANDSHAKE_OVER )
{
SSL_DEBUG_MSG( 2, ( "client state: %d", ssl->state ) );
if( ( ret = ssl_flush_output( ssl ) ) != 0 )
break;
switch( ssl->state )
{
case SSL_HELLO_REQUEST:
ssl->state = SSL_CLIENT_HELLO;
break;
/*
* ==> ClientHello
*/
case SSL_CLIENT_HELLO:
ret = ssl_write_client_hello( ssl );
break;
/*
* <== ServerHello
* Certificate
* ( ServerKeyExchange )
* ( CertificateRequest )
* ServerHelloDone
*/
case SSL_SERVER_HELLO:
ret = ssl_parse_server_hello( ssl );
break;
case SSL_SERVER_CERTIFICATE:
ret = ssl_parse_certificate( ssl );
break;
case SSL_SERVER_KEY_EXCHANGE:
ret = ssl_parse_server_key_exchange( ssl );
break;
case SSL_CERTIFICATE_REQUEST:
ret = ssl_parse_certificate_request( ssl );
break;
case SSL_SERVER_HELLO_DONE:
ret = ssl_parse_server_hello_done( ssl );
break;
/*
* ==> ( Certificate/Alert )
* ClientKeyExchange
* ( CertificateVerify )
* ChangeCipherSpec
* Finished
*/
case SSL_CLIENT_CERTIFICATE:
ret = ssl_write_certificate( ssl );
break;
case SSL_CLIENT_KEY_EXCHANGE:
ret = ssl_write_client_key_exchange( ssl );
break;
case SSL_CERTIFICATE_VERIFY:
ret = ssl_write_certificate_verify( ssl );
break;
case SSL_CLIENT_CHANGE_CIPHER_SPEC:
ret = ssl_write_change_cipher_spec( ssl );
break;
case SSL_CLIENT_FINISHED:
ret = ssl_write_finished( ssl );
break;
/*
* <== ChangeCipherSpec
* Finished
*/
case SSL_SERVER_CHANGE_CIPHER_SPEC:
ret = ssl_parse_change_cipher_spec( ssl );
break;
case SSL_SERVER_FINISHED:
ret = ssl_parse_finished( ssl );
break;
case SSL_FLUSH_BUFFERS:
SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
ssl->state = SSL_HANDSHAKE_OVER;
break;
default:
SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
}
if( ret != 0 )
break;
}
SSL_DEBUG_MSG( 2, ( "<= handshake client" ) );
return( ret );
}
#endif
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