In order to avoid CBC ciphers as often as possible (they contain some known vulnerabilities), this changes the OpenSSL default ciphersuite to:
TLS_CHACHA20_POLY1305_SHA256 TLSv1.3 Kx=any Au=any Enc=CHACHA20/POLY1305(256) Mac=AEAD TLS_AES_256_GCM_SHA384 TLSv1.3 Kx=any Au=any Enc=AESGCM(256) Mac=AEAD TLS_AES_128_GCM_SHA256 TLSv1.3 Kx=any Au=any Enc=AESGCM(128) Mac=AEAD ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128) Mac=AEAD ECDHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH Au=RSA Enc=CHACHA20/POLY1305(256) Mac=AEAD ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA384 ECDHE-ECDSA-CAMELLIA256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=Camellia(256) Mac=SHA384 ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA384 ECDHE-RSA-CAMELLIA256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=Camellia(256) Mac=SHA384 ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA256 ECDHE-ECDSA-CAMELLIA128-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=Camellia(128) Mac=SHA256 ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(128) Mac=SHA256 ECDHE-RSA-CAMELLIA128-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=Camellia(128) Mac=SHA256 DHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=DH Au=RSA Enc=CHACHA20/POLY1305(256) Mac=AEAD DHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=DH Au=RSA Enc=AESGCM(256) Mac=AEAD DHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AESGCM(128) Mac=AEAD DHE-RSA-AES256-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AES(256) Mac=SHA256 DHE-RSA-CAMELLIA256-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=Camellia(256) Mac=SHA256 DHE-RSA-AES128-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AES(128) Mac=SHA256 DHE-RSA-CAMELLIA128-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=Camellia(128) Mac=SHA256 ECDHE-ECDSA-AES256-SHA TLSv1 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA1 ECDHE-ECDSA-AES128-SHA TLSv1 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA1 ECDHE-RSA-AES256-SHA TLSv1 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA1 ECDHE-RSA-AES128-SHA TLSv1 Kx=ECDH Au=RSA Enc=AES(128) Mac=SHA1 DHE-RSA-AES256-SHA SSLv3 Kx=DH Au=RSA Enc=AES(256) Mac=SHA1 DHE-RSA-CAMELLIA256-SHA SSLv3 Kx=DH Au=RSA Enc=Camellia(256) Mac=SHA1 DHE-RSA-AES128-SHA SSLv3 Kx=DH Au=RSA Enc=AES(128) Mac=SHA1 DHE-RSA-CAMELLIA128-SHA SSLv3 Kx=DH Au=RSA Enc=Camellia(128) Mac=SHA1 AES256-GCM-SHA384 TLSv1.2 Kx=RSA Au=RSA Enc=AESGCM(256) Mac=AEAD AES128-GCM-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AESGCM(128) Mac=AEAD AES256-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA256 CAMELLIA256-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=Camellia(256) Mac=SHA256 AES128-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AES(128) Mac=SHA256 CAMELLIA128-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=Camellia(128) Mac=SHA256 AES256-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA1 CAMELLIA256-SHA SSLv3 Kx=RSA Au=RSA Enc=Camellia(256) Mac=SHA1 AES128-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(128) Mac=SHA1 CAMELLIA128-SHA SSLv3 Kx=RSA Au=RSA Enc=Camellia(128) Mac=SHA1
Since TLS servers usually override the clients' preference with their own, this will neither break existing setups nor introduce huge differences in the wild. Unfortunately, CBC ciphers cannot be disabled at all, as they are still used by popular web sites.
TLS 1.3 ciphers will be added implicitly and can be omitted in the ciphersting. Chacha20/Poly1305 is preferred over AES-GCM due to missing AES-NI support for the majority of installations reporting to Fireinfo (see https://fireinfo.ipfire.org/processors for details, AES-NI support is 28.22% at the time of writing).
Signed-off-by: Peter Müller peter.mueller@ipfire.org --- lfs/openssl | 2 +- ...t-cipherlist.patch => openssl-1.1.1c-default-cipherlist.patch} | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-) rename src/patches/{openssl-1.1.1a-default-cipherlist.patch => openssl-1.1.1c-default-cipherlist.patch} (66%)
diff --git a/lfs/openssl b/lfs/openssl index 9f9e7a684..47bd4aff0 100644 --- a/lfs/openssl +++ b/lfs/openssl @@ -117,7 +117,7 @@ $(subst %,%_MD5,$(objects)) : $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects)) @$(PREBUILD) @rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar zxf $(DIR_DL)/$(DL_FILE) - cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.1.1a-default-cipherlist.patch + cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.1.1c-default-cipherlist.patch
# Apply our CFLAGS cd $(DIR_APP) && sed -i Configure \ diff --git a/src/patches/openssl-1.1.1a-default-cipherlist.patch b/src/patches/openssl-1.1.1c-default-cipherlist.patch similarity index 66% rename from src/patches/openssl-1.1.1a-default-cipherlist.patch rename to src/patches/openssl-1.1.1c-default-cipherlist.patch index dfe156bf5..72f6ce3b1 100644 --- a/src/patches/openssl-1.1.1a-default-cipherlist.patch +++ b/src/patches/openssl-1.1.1c-default-cipherlist.patch @@ -1,11 +1,12 @@ ---- openssl-1.1.1.orig/include/openssl/ssl.h 2018-09-11 14:48:23.000000000 +0200 -+++ openssl-1.1.1/include/openssl/ssl.h 2018-11-05 16:55:03.935513159 +0100 +diff -Naur openssl-1.1.1c.orig/include/openssl/ssl.h openssl-1.1.1c/include/openssl/ssl.h +--- openssl-1.1.1c.orig/include/openssl/ssl.h 2019-06-10 20:41:21.209140012 +0200 ++++ openssl-1.1.1c/include/openssl/ssl.h 2019-06-10 20:42:26.733973129 +0200 @@ -170,11 +170,11 @@ * an application-defined cipher list string starts with 'DEFAULT'. * This applies to ciphersuites for TLSv1.2 and below. */ -# define SSL_DEFAULT_CIPHER_LIST "ALL:!COMPLEMENTOFDEFAULT:!eNULL" -+# define SSL_DEFAULT_CIPHER_LIST "TLSv1.3:CHACHA20:HIGH:+DH:+aRSA:+SHA:+kRSA:!aNULL:!eNULL:!SRP:!PSK:!DSS:!AESCCM" ++# define SSL_DEFAULT_CIPHER_LIST "CHACHA20:HIGH:+aRSA:+SHA384:+SHA256:+DH:+SHA:+kRSA:!eNULL:!aNULL:!PSK:!SRP:!AESCCM:!DSS" /* This is the default set of TLSv1.3 ciphersuites */ # if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305) -# define TLS_DEFAULT_CIPHERSUITES "TLS_AES_256_GCM_SHA384:" \ @@ -15,4 +16,3 @@ "TLS_AES_128_GCM_SHA256" # else # define TLS_DEFAULT_CIPHERSUITES "TLS_AES_256_GCM_SHA384:" \ -