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Improve interop by not writing ext_len in ClientHello when 0

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The RFC also indicates that without any extensions, we should write a
struct {} (empty) not an array of length zero.
This commit is contained in:
Paul Bakker 2014-07-08 16:24:56 +02:00
parent 6993284ece
commit 838ed3c74d
2 changed files with 7 additions and 2 deletions
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2
ChangeLog
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@ -49,6 +49,8 @@ Bugfix
* Some example server programs were not sending the close_notify alert.
* Potential memory leak in mpi_exp_mod() when error occurs during
calculation of RR.
* Improve interoperability by not writing extension length in ClientHello
when no extensions are present (found by Matthew Page)
= Version 1.2.10 released 2013-10-07
Changes

7
library/ssl_cli.c
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@ -212,8 +212,11 @@ static int ssl_write_client_hello( ssl_context *ssl )
SSL_DEBUG_MSG( 3, ( "client hello, total extension length: %d",
ext_len ) );
*p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( ext_len ) & 0xFF );
if( ext_len > 0 )
{
*p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( ext_len ) & 0xFF );
}
if ( ssl->hostname != NULL )
{