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tls: code shrink

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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 <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-11-13 03:15:15 +01:00
parent bddb6545a9
commit 375fc78d51
1 changed files with 21 additions and 11 deletions
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32
networking/tls_fe.c
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@ -556,19 +556,29 @@ static void xc_double(byte *x3, byte *z3,
void curve25519(byte *result, const byte *e, const byte *q) 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; 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 */ /* Note: bit 254 is assumed to be 1 */
lm_copy(xm, q); lm_copy(xm, q);