New "i62" code for big integers with 64x64->128 opcodes; also improved "i31" modular...

[BearSSL] / src / ec / ec_prime_i15.c

diff --git a/src/ec/ec_prime_i15.c b/src/ec/ec_prime_i15.c
index bf1d002..85affe5 100644 (file)
--- a/src/ec/ec_prime_i15.c
+++ b/src/ec/ec_prime_i15.c
@@ -716,6 +716,14 @@ api_order(int curve, size_t *len)
        return cd->order;
 }
 
+static size_t
+api_xoff(int curve, size_t *len)
+{
+       api_generator(curve, len);
+       *len >>= 1;
+       return 1;
+}
+
 static uint32_t
 api_mul(unsigned char *G, size_t Glen,
        const unsigned char *x, size_t xlen, int curve)
@@ -805,6 +813,7 @@ const br_ec_impl br_ec_prime_i15 = {
        (uint32_t)0x03800000,
        &api_generator,
        &api_order,
+       &api_xoff,
        &api_mul,
        &api_mulgen,
        &api_muladd