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core/crypto/_weierstrass: Add scalar field inversion

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This commit is contained in:
Yawning Angel
2026-02-13 07:36:15 +09:00
parent aea6274a10
commit ffa6fc2a67
4 changed files with 677 additions and 5 deletions
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35
tests/core/crypto/test_core_crypto_weierstrass.odin
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@@ -1,5 +1,6 @@
package test_core_crypto
import "core:crypto"
import ec "core:crypto/_weierstrass"
import "core:encoding/hex"
import "core:math/big"
@@ -881,7 +882,7 @@ test_p384_scalar_mul :: proc(t: ^testing.T) {
}
@(test)
test_p256_s11n_sec_identity ::proc(t: ^testing.T) {
test_p256_s11n_sec_identity :: proc(t: ^testing.T) {
p: ec.Point_p256r1
ec.pt_generator(&p)
@@ -901,7 +902,7 @@ test_p256_s11n_sec_identity ::proc(t: ^testing.T) {
}
@(test)
test_p256_s11n_sec_generator ::proc(t: ^testing.T) {
test_p256_s11n_sec_generator :: proc(t: ^testing.T) {
p, g: ec.Point_p256r1
ec.pt_generator(&g)
@@ -917,3 +918,33 @@ test_p256_s11n_sec_generator ::proc(t: ^testing.T) {
testing.expectf(t, ok, "%s", s)
testing.expect(t, ec.pt_equal(&g, &p) == 1)
}
@(test)
test_p256_sc_inv :: proc(t: ^testing.T) {
if crypto.HAS_RAND_BYTES == false {
return
}
sc, sc_inv, sc_prod, sc_one: ec.Scalar_p256r1
ec.sc_set_random(&sc)
ec.sc_inv(&sc_inv, &sc)
ec.sc_one(&sc_one)
ec.sc_mul(&sc_prod, &sc, &sc_inv)
testing.expect(t, ec.sc_equal(&sc_prod, &sc_one) == 1)
}
@(test)
test_p384_sc_inv :: proc(t: ^testing.T) {
if crypto.HAS_RAND_BYTES == false {
return
}
sc, sc_inv, sc_prod, sc_one: ec.Scalar_p384r1
ec.sc_set_random(&sc)
ec.sc_inv(&sc_inv, &sc)
ec.sc_one(&sc_one)
ec.sc_mul(&sc_prod, &sc, &sc_inv)
testing.expect(t, ec.sc_equal(&sc_prod, &sc_one) == 1)
}