From 375fc78d51f128f36c4fe17df0d284cecd28d55e Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Tue, 13 Nov 2018 03:15:15 +0100 Subject: [PATCH] tls: code shrink function old new delta static.f25519_one 32 - -32 curve25519 835 802 -33 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 0/1 up/down: 0/-65) Total: -65 bytes Signed-off-by: Denys Vlasenko --- networking/tls_fe.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) diff --git a/networking/tls_fe.c b/networking/tls_fe.c index 37fea34f7..dcb41468a 100644 --- a/networking/tls_fe.c +++ b/networking/tls_fe.c @@ -556,19 +556,29 @@ static void xc_double(byte *x3, byte *z3, void curve25519(byte *result, const byte *e, const byte *q) { - /* from wolfssl-3.15.3/wolfssl/wolfcrypt/fe_operations.h */ - static const byte f25519_one[F25519_SIZE] = {1}; - - /* Current point: P_m */ - byte xm[F25519_SIZE]; - byte zm[F25519_SIZE] = {1}; - - /* Predecessor: P_(m-1) */ - byte xm1[F25519_SIZE] = {1}; - byte zm1[F25519_SIZE] = {0}; - int i; + struct { + /* from wolfssl-3.15.3/wolfssl/wolfcrypt/fe_operations.h */ + /*static const*/ byte f25519_one[F25519_SIZE]; // = {1}; + + /* Current point: P_m */ + byte xm[F25519_SIZE]; + byte zm[F25519_SIZE]; // = {1}; + /* Predecessor: P_(m-1) */ + byte xm1[F25519_SIZE]; // = {1}; + byte zm1[F25519_SIZE]; // = {0}; + } z; +#define f25519_one z.f25519_one +#define xm z.xm +#define zm z.zm +#define xm1 z.xm1 +#define zm1 z.zm1 + memset(&z, 0, sizeof(z)); + f25519_one[0] = 1; + zm[0] = 1; + xm1[0] = 1; + /* Note: bit 254 is assumed to be 1 */ lm_copy(xm, q); -- 2.25.1