From: Jason A. Donenfeld <Jason@zx2c4.com>
Date: Wed, 11 Dec 2019 09:26:39 +0000 (+0100)
Subject: crypto: arm/curve25519 - add arch-specific key generation function
X-Git-Tag: baikal/mips/sdk5.9~14702^2
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=00418b6b10e622173eb9889f0abecb7bf6bfc26f;p=kernel.git

crypto: arm/curve25519 - add arch-specific key generation function

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>
---

diff --git a/arch/arm/crypto/curve25519-glue.c b/arch/arm/crypto/curve25519-glue.c
index f3f42cf3b8937..776ae07e04697 100644
--- a/arch/arm/crypto/curve25519-glue.c
+++ b/arch/arm/crypto/curve25519-glue.c
@@ -38,6 +38,13 @@ void curve25519_arch(u8 out[CURVE25519_KEY_SIZE],
 }
 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)
 {