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authorJouni Malinen <j@w1.fi>2019-01-05 15:02:33 (GMT)
committerJouni Malinen <j@w1.fi>2019-01-05 15:14:26 (GMT)
commitcc9c4feccc5588137f66c40a4a6729476556853e (patch)
tree8056a0dcf308f006bf9592b750c61bcd6417d7ab /hostapd
parente3afbd796cbae8be6d1b6f5a8ea841bb5a62d753 (diff)
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OpenSSL: Allow systemwide policies to be overridden
Some distributions (e.g., Debian) have started introducting systemwide OpenSSL policies to disable older protocol versions and ciphers throughout all programs using OpenSSL. This can result in significant number of interoperability issues with deployed EAP implementations. Allow explicit wpa_supplicant (EAP peer) and hostapd (EAP server) parameters to be used to request systemwide policies to be overridden if older versions are needed to be able to interoperate with devices that cannot be updated to support the newer protocol versions or keys. The default behavior is not changed here, i.e., the systemwide policies will be followed if no explicit override configuration is used. The overrides should be used only if really needed since they can result in reduced security. In wpa_supplicant, tls_disable_tlsv1_?=0 value in the phase1 network profile parameter can be used to explicitly enable TLS versions that are disabled in the systemwide configuration. For example, phase1="tls_disable_tlsv1_0=0 tls_disable_tlsv1_1=0" would request TLS v1.0 and TLS v1.1 to be enabled even if the systemwide policy enforces TLS v1.2 as the minimum version. Similarly, openssl_ciphers parameter can be used to override systemwide policy, e.g., with openssl_ciphers="DEFAULT@SECLEVEL=1" to drop from security level 2 to 1 in Debian to allow shorter keys to be used. In hostapd, tls_flags parameter can be used to configure similar options. E.g., tls_flags=[ENABLE-TLSv1.0][ENABLE-TLSv1.1] Signed-off-by: Jouni Malinen <j@w1.fi>
Diffstat (limited to 'hostapd')
-rw-r--r--hostapd/config_file.c6
-rw-r--r--hostapd/hostapd.conf21
2 files changed, 27 insertions, 0 deletions
diff --git a/hostapd/config_file.c b/hostapd/config_file.c
index 19ccb30..10a52fd 100644
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -2265,10 +2265,16 @@ static unsigned int parse_tls_flags(const char *val)
flags |= TLS_CONN_DISABLE_TIME_CHECKS;
if (os_strstr(val, "[DISABLE-TLSv1.0]"))
flags |= TLS_CONN_DISABLE_TLSv1_0;
+ if (os_strstr(val, "[ENABLE-TLSv1.0]"))
+ flags |= TLS_CONN_ENABLE_TLSv1_0;
if (os_strstr(val, "[DISABLE-TLSv1.1]"))
flags |= TLS_CONN_DISABLE_TLSv1_1;
+ if (os_strstr(val, "[ENABLE-TLSv1.1]"))
+ flags |= TLS_CONN_ENABLE_TLSv1_1;
if (os_strstr(val, "[DISABLE-TLSv1.2]"))
flags |= TLS_CONN_DISABLE_TLSv1_2;
+ if (os_strstr(val, "[ENABLE-TLSv1.2]"))
+ flags |= TLS_CONN_ENABLE_TLSv1_2;
if (os_strstr(val, "[DISABLE-TLSv1.3]"))
flags |= TLS_CONN_DISABLE_TLSv1_3;
if (os_strstr(val, "[ENABLE-TLSv1.3]"))
diff --git a/hostapd/hostapd.conf b/hostapd/hostapd.conf
index d7add2d..26f9d34 100644
--- a/hostapd/hostapd.conf
+++ b/hostapd/hostapd.conf
@@ -917,6 +917,27 @@ eap_server=0
# (default: 0 = session caching and resumption disabled)
#tls_session_lifetime=3600
+# TLS flags
+# [ALLOW-SIGN-RSA-MD5] = allow MD5-based certificate signatures (depending on
+# the TLS library, these may be disabled by default to enforce stronger
+# security)
+# [DISABLE-TIME-CHECKS] = ignore certificate validity time (this requests
+# the TLS library to accept certificates even if they are not currently
+# valid, i.e., have expired or have not yet become valid; this should be
+# used only for testing purposes)
+# [DISABLE-TLSv1.0] = disable use of TLSv1.0
+# [ENABLE-TLSv1.0] = explicitly enable use of TLSv1.0 (this allows
+# systemwide TLS policies to be overridden)
+# [DISABLE-TLSv1.1] = disable use of TLSv1.1
+# [ENABLE-TLSv1.1] = explicitly enable use of TLSv1.1 (this allows
+# systemwide TLS policies to be overridden)
+# [DISABLE-TLSv1.2] = disable use of TLSv1.2
+# [ENABLE-TLSv1.2] = explicitly enable use of TLSv1.2 (this allows
+# systemwide TLS policies to be overridden)
+# [DISABLE-TLSv1.3] = disable use of TLSv1.3
+# [ENABLE-TLSv1.3] = enable TLSv1.3 (experimental - disabled by default)
+#tls_flags=[flag1][flag2]...
+
# Cached OCSP stapling response (DER encoded)
# If set, this file is sent as a certificate status response by the EAP server
# if the EAP peer requests certificate status in the ClientHello message.