Remove compression field from SSL session if compression disabled
diff --git a/library/ssl_cache.c b/library/ssl_cache.c
index bcc2f59..90e2a81 100644
--- a/library/ssl_cache.c
+++ b/library/ssl_cache.c
@@ -86,7 +86,8 @@
if( mbedtls_ssl_session_get_ciphersuite( session ) !=
mbedtls_ssl_session_get_ciphersuite( &entry->session ) ||
- session->compression != entry->session.compression ||
+ mbedtls_ssl_session_get_compression( session ) !=
+ mbedtls_ssl_session_get_compression( &entry->session ) ||
session->id_len != entry->session.id_len )
{
continue;
diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 003aa10..cdb35f3 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -1837,7 +1837,7 @@
if( n == 0 ||
mbedtls_ssl_get_renego_status( ssl ) != MBEDTLS_SSL_INITIAL_HANDSHAKE ||
mbedtls_ssl_session_get_ciphersuite( ssl->session_negotiate ) != i ||
- ssl->session_negotiate->compression != comp ||
+ mbedtls_ssl_session_get_compression( ssl->session_negotiate ) != comp ||
ssl->session_negotiate->id_len != n ||
memcmp( ssl->session_negotiate->id, buf + 35, n ) != 0 )
{
@@ -1868,7 +1868,9 @@
#if !defined(MBEDTLS_SSL_CONF_SINGLE_CIPHERSUITE)
ssl->session_negotiate->ciphersuite = i;
#endif /* MBEDTLS_SSL_CONF_SINGLE_CIPHERSUITE */
+#if defined(MBEDTLS_ZLIB_SUPPORT)
ssl->session_negotiate->compression = comp;
+#endif
ssl->session_negotiate->id_len = n;
memcpy( ssl->session_negotiate->id, buf + 35, n );
}
@@ -1932,7 +1934,9 @@
MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
}
+#if defined(MBEDTLS_ZLIB_SUPPORT)
ssl->session_negotiate->compression = comp;
+#endif
ext = buf + 40 + n;
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index 573f327..bcc1052 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -1802,8 +1802,8 @@
MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, compression",
buf + comp_offset + 1, comp_len );
- ssl->session_negotiate->compression = MBEDTLS_SSL_COMPRESS_NULL;
#if defined(MBEDTLS_ZLIB_SUPPORT)
+ ssl->session_negotiate->compression = MBEDTLS_SSL_COMPRESS_NULL;
for( i = 0; i < comp_len; ++i )
{
if( buf[comp_offset + 1 + i] == MBEDTLS_SSL_COMPRESS_DEFLATE )
@@ -1812,13 +1812,13 @@
break;
}
}
-#endif
/* See comments in ssl_write_client_hello() */
#if defined(MBEDTLS_SSL_PROTO_DTLS)
if( MBEDTLS_SSL_TRANSPORT_IS_DTLS( ssl->conf->transport ) )
ssl->session_negotiate->compression = MBEDTLS_SSL_COMPRESS_NULL;
#endif
+#endif /* MBEDTLS_ZLIB_SUPPORT */
/* Do not parse the extensions if the protocol is SSLv3 */
#if defined(MBEDTLS_SSL_PROTO_SSL3)
@@ -2881,12 +2881,13 @@
ciphersuite = mbedtls_ssl_session_get_ciphersuite( ssl->session_negotiate );
*p++ = (unsigned char)( ciphersuite >> 8 );
*p++ = (unsigned char)( ciphersuite );
- *p++ = (unsigned char)( ssl->session_negotiate->compression );
+ *p++ = (unsigned char)(
+ mbedtls_ssl_session_get_compression( ssl->session_negotiate ) );
MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %s",
mbedtls_ssl_get_ciphersuite_name( ciphersuite ) ) );
MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, compress alg.: 0x%02X",
- ssl->session_negotiate->compression ) );
+ mbedtls_ssl_session_get_compression( ssl->session_negotiate ) ) );
/* Do not write the extensions if the protocol is SSLv3 */
#if defined(MBEDTLS_SSL_PROTO_SSL3)
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index d046020..95a5e9c 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -9327,6 +9327,12 @@
#define SSL_SERIALIZED_SESSION_CONFIG_KEEP_CRT 0
#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+#if defined(MBEDTLS_ZLIB_SUPPORT)
+#define SSL_SERIALIZED_SESSION_CONFIG_COMPRESSION 1
+#else
+#define SSL_SERIALIZED_SESSION_CONFIG_COMPRESSION 0
+#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
#define SSL_SERIALIZED_SESSION_CONFIG_TIME_BIT 0
#define SSL_SERIALIZED_SESSION_CONFIG_CRT_BIT 1
#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET_BIT 2
@@ -9335,6 +9341,7 @@
#define SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT 5
#define SSL_SERIALIZED_SESSION_CONFIG_TICKET_BIT 6
#define SSL_SERIALIZED_SESSION_CONFIG_KEEP_CRT_BIT 7
+#define SSL_SERIALIZED_SESSION_CONFIG_COMPRESSION_BIT 8
#define SSL_SERIALIZED_SESSION_CONFIG_BITFLAG \
( (uint16_t) ( \
@@ -9345,6 +9352,7 @@
( SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC << SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC_BIT ) | \
( SSL_SERIALIZED_SESSION_CONFIG_ETM << SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT ) | \
( SSL_SERIALIZED_SESSION_CONFIG_TICKET << SSL_SERIALIZED_SESSION_CONFIG_TICKET_BIT ) | \
+ ( SSL_SERIALIZED_SESSION_CONFIG_COMPRESSION << SSL_SERIALIZED_SESSION_CONFIG_COMPRESSION_BIT ) | \
( SSL_SERIALIZED_SESSION_CONFIG_KEEP_CRT << SSL_SERIALIZED_SESSION_CONFIG_KEEP_CRT_BIT ) ) )
static unsigned char ssl_serialized_session_header[] = {
@@ -9450,12 +9458,28 @@
/*
* Basic mandatory fields
*/
- used += 2 /* ciphersuite */
- + 1 /* compression */
- + 1 /* id_len */
- + sizeof( session->id )
- + sizeof( session->master )
- + 4; /* verify_result */
+ {
+ size_t const ciphersuite_len = 2;
+#if defined(MBEDTLS_ZLIB_SUPPORT)
+ size_t const compression_len = 1;
+#else
+ size_t const compression_len = 0;
+#endif
+ size_t const id_len_len = 1;
+ size_t const id_len = 32;
+ size_t const master_len = 48;
+ size_t const verif_result_len = 4;
+
+ size_t const basic_len =
+ ciphersuite_len +
+ compression_len +
+ id_len_len +
+ id_len +
+ master_len +
+ verif_result_len;
+
+ used += basic_len;
+ }
if( used <= buf_len )
{
@@ -9464,7 +9488,10 @@
*p++ = (unsigned char)( ( ciphersuite >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( ciphersuite ) & 0xFF );
- *p++ = (unsigned char)( session->compression & 0xFF );
+#if defined(MBEDTLS_ZLIB_SUPPORT)
+ *p++ = (unsigned char)(
+ mbedtls_ssl_session_get_compression( session ) );
+#endif
*p++ = (unsigned char)( session->id_len & 0xFF );
memcpy( p, session->id, 32 );
@@ -9662,9 +9689,29 @@
/*
* Basic mandatory fields
*/
+ {
+ size_t const ciphersuite_len = 2;
+#if defined(MBEDTLS_ZLIB_SUPPORT)
+ size_t const compression_len = 1;
+#else
+ size_t const compression_len = 0;
+#endif
+ size_t const id_len_len = 1;
+ size_t const id_len = 32;
+ size_t const master_len = 48;
+ size_t const verif_result_len = 4;
- if( 2 + 1 + 1 + 32 + 48 + 4 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+ size_t const basic_len =
+ ciphersuite_len +
+ compression_len +
+ id_len_len +
+ id_len +
+ master_len +
+ verif_result_len;
+
+ if( basic_len > (size_t)( end - p ) )
+ return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+ }
ciphersuite = ( p[0] << 8 ) | p[1];
p += 2;
@@ -9679,7 +9726,9 @@
}
#endif
+#if defined(MBEDTLS_ZLIB_SUPPORT)
session->compression = *p++;
+#endif
session->id_len = *p++;
memcpy( session->id, p, 32 );