From c1a77961c1aca6cd50e3ad44b5b39350f1070286 Mon Sep 17 00:00:00 2001 From: =?utf8?q?J=C3=B6rg=20Krause?= Date: Sun, 29 Jan 2017 22:15:11 +0100 Subject: [PATCH] package/mbedtls: fix zlib support MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit To enable compression support using zlib it is necessary to uncomment the define for MBEDTLS_ZLIB_SUPPORT in config.h [1]. Note, that enabling TLS compression may make mbedTLS vulnerable to the CRIME attack [1]. It should not be enabled unless is is sure CRIME and similar attacks are not applicable to the particulare situation. As zlib is probably enabled in most systems, maybe it is best to make the compression support a user choice and add the warning from [1]? [1] https://tls.mbed.org/kb/how-to/deflate-compression-in-ssl-tls Signed-off-by: Jörg Krause Signed-off-by: Thomas Petazzoni --- package/mbedtls/mbedtls.mk | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/package/mbedtls/mbedtls.mk b/package/mbedtls/mbedtls.mk index a8bd61f129..7171af9f98 100644 --- a/package/mbedtls/mbedtls.mk +++ b/package/mbedtls/mbedtls.mk @@ -42,6 +42,11 @@ endif ifeq ($(BR2_PACKAGE_ZLIB),y) MBEDTLS_CONF_OPTS += -DENABLE_ZLIB_SUPPORT=ON MBEDTLS_DEPENDENCIES += zlib +define MBEDTLS_ENABLE_ZLIB + $(SED) "s://#define MBEDTLS_ZLIB_SUPPORT:#define MBEDTLS_ZLIB_SUPPORT:" \ + $(@D)/include/mbedtls/config.h +endef +MBEDTLS_POST_PATCH_HOOKS += MBEDTLS_ENABLE_ZLIB else MBEDTLS_CONF_OPTS += -DENABLE_ZLIB_SUPPORT=OFF endif -- 2.30.2