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Add the 'cookie' field of DTLS ClientHello

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Manuel Pégourié-Gonnard 2014-03-21 09:40:12 +01:00 • committed by Paul Bakker
parent 8933a65d5c
commit 4128aa71ee
2 changed files with 65 additions and 17 deletions
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37
library/ssl_cli.c
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@ -520,11 +520,13 @@ static int ssl_write_client_hello( ssl_context *ssl )
/*
* 38 . 38 session id length
* 39 . 39+n session id
* 40+n . 41+n ciphersuitelist length
* 42+n . .. ciphersuitelist
* .. . .. compression methods length
* 39+n . 39+n DTLS only: cookie length (1 byte)
* 40+n . .. DTSL only: cookie
* .. . .. ciphersuitelist length (2 bytes)
* .. . .. ciphersuitelist
* .. . .. compression methods length (1 byte)
* .. . .. compression methods
* .. . .. extensions length
* .. . .. extensions length (2 bytes)
* .. . .. extensions
*/
n = ssl->session_negotiate->length;
@ -561,16 +563,29 @@ static int ssl_write_client_hello( ssl_context *ssl )
SSL_DEBUG_MSG( 3, ( "client hello, session id len.: %d", n ) );
SSL_DEBUG_BUF( 3, "client hello, session id", buf + 39, n );
ciphersuites = ssl->ciphersuite_list[ssl->minor_ver];
n = 0;
q = p;
// Skip writing ciphersuite length for now
p += 2;
/*
* DTLS cookie
*/
#if defined(POLARSSL_SSL_PROTO_DTLS)
if( ssl->transport == SSL_TRANSPORT_DATAGRAM )
{
/* TODO-DTLS: for now, just send an empty cookie, later on must send
* back the cookie from HelloVerifyRequest */
*p++ = 0;
}
#endif
/*
* Add TLS_EMPTY_RENEGOTIATION_INFO_SCSV
* Ciphersuite list
*/
ciphersuites = ssl->ciphersuite_list[ssl->minor_ver];
/* Skip writing ciphersuite length for now */
n = 0;
q = p;
p += 2;
/* Add TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
if( ssl->renegotiation == SSL_INITIAL_HANDSHAKE )
{
*p++ = (unsigned char)( SSL_EMPTY_RENEGOTIATION_INFO >> 8 );