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ecdsa: tiny optimization for key and curve

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This commit is contained in:
Megamouse 2023-07-13 00:59:57 +02:00
parent de15c9746f
commit 43cfb3cd10
1 changed files with 10 additions and 0 deletions
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10
rpcs3/Crypto/ec.cpp
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@ -176,6 +176,8 @@ static thread_local u8 ec_N[21]{};
static thread_local point ec_G{}; // mon
static thread_local point ec_Q{}; // mon
static thread_local u8 ec_k[21]{};
static thread_local bool ec_curve_initialized{};
static thread_local bool ec_pub_initialized{};
static inline bool elt_is_zero(u8* d)
{
@ -382,6 +384,8 @@ static bool check_ecdsa(struct point* Q, u8* R, u8* S, u8* hash)
void ecdsa_set_curve(const u8* p, const u8* a, const u8* b, const u8* N, const u8* Gx, const u8* Gy)
{
if (ec_curve_initialized) return;
memcpy(ec_p, p, 20);
memcpy(ec_a, a, 20);
memcpy(ec_b, b, 20);
@ -393,13 +397,19 @@ void ecdsa_set_curve(const u8* p, const u8* a, const u8* b, const u8* N, const u
bn_to_mon(ec_b, ec_p, 20);
point_to_mon(&ec_G);
ec_curve_initialized = true;
}
void ecdsa_set_pub(const u8* Q)
{
if (ec_pub_initialized) return;
memcpy(ec_Q.x, Q, 20);
memcpy(ec_Q.y, Q + 20, 20);
point_to_mon(&ec_Q);
ec_pub_initialized = true;
}
void ecdsa_set_priv(const u8* k)