libgcrypt: fix CVE-2017-9526

In libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from
side-channel observation during the signing process) can easily recover the
long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this
session key in secure memory, to ensure that constant-time point operations are
used in the MPI library.

(From OE-Core rev: 04d7a4adafa09f9f3012c355f4f2f9728cb0b166)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-support/libgcrypt/libgcrypt.inc b/meta/recipes-support/libgcrypt/libgcrypt.inc
index 15805cd436..7c4c0e83b5 100644
--- a/meta/recipes-support/libgcrypt/libgcrypt.inc
+++ b/meta/recipes-support/libgcrypt/libgcrypt.inc
@@ -20,6 +20,7 @@ SRC_URI = "${GNUPG_MIRROR}/libgcrypt/libgcrypt-${PV}.tar.gz \
            file://libgcrypt-fix-building-error-with-O2-in-sysroot-path.patch \
            file://fix-ICE-failure-on-mips-with-option-O-and-g.patch \
            file://fix-undefined-reference-to-pthread.patch \
+           file://0001-ecc-Store-EdDSA-session-key-in-secure-memory.patch \
 "
 
 BINCONFIG = "${bindir}/libgcrypt-config"