1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0039-crypto-arm-curve25519-add-arch-specific-key-generati.patch b/target/linux/generic/backport-5.4/080-wireguard-0039-crypto-arm-curve25519-add-arch-specific-key-generati.patch
new file mode 100644
index 0000000000..67de22deb6
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0039-crypto-arm-curve25519-add-arch-specific-key-generati.patch
@@ -0,0 +1,38 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: "Jason A. Donenfeld" <Jason@zx2c4.com>
+Date: Wed, 11 Dec 2019 10:26:39 +0100
+Subject: [PATCH] crypto: arm/curve25519 - add arch-specific key generation
+ function
+
+commit 84faa307249b341f6ad8de3e1869d77a65e26669 upstream.
+
+Somehow this was forgotten when Zinc was being split into oddly shaped
+pieces, resulting in linker errors. The x86_64 glue has a specific key
+generation implementation, but the Arm one does not. However, it can
+still receive the NEON speedups by calling the ordinary DH function
+using the base point.
+
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+Acked-by: Ard Biesheuvel <ardb@kernel.org>
+Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+---
+ arch/arm/crypto/curve25519-glue.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+--- a/arch/arm/crypto/curve25519-glue.c
++++ b/arch/arm/crypto/curve25519-glue.c
+@@ -38,6 +38,13 @@ void curve25519_arch(u8 out[CURVE25519_K
+ }
+ EXPORT_SYMBOL(curve25519_arch);
+ 
++void curve25519_base_arch(u8 pub[CURVE25519_KEY_SIZE],
++			  const u8 secret[CURVE25519_KEY_SIZE])
++{
++	return curve25519_arch(pub, secret, curve25519_base_point);
++}
++EXPORT_SYMBOL(curve25519_base_arch);
++
+ static int curve25519_set_secret(struct crypto_kpp *tfm, const void *buf,
+ 				 unsigned int len)
+ {