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parameterize ecmult_const over input size

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This commit is contained in:
Andrew Poelstra
2018-03-13 16:32:51 +00:00
parent dbc3ddd5e2
commit 7c1b91ba4b
7 changed files with 78 additions and 49 deletions
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24
src/tests.c
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@@ -2443,7 +2443,7 @@ void ecmult_const_random_mult(void) {
0xb84e4e1b, 0xfb77e21f, 0x96baae2a, 0x63dec956
);
secp256k1_gej b;
secp256k1_ecmult_const(&b, &a, &xn);
secp256k1_ecmult_const(&b, &a, &xn, 256);
CHECK(secp256k1_ge_is_valid_var(&a));
ge_equals_gej(&expected_b, &b);
@@ -2459,12 +2459,12 @@ void ecmult_const_commutativity(void) {
random_scalar_order_test(&a);
random_scalar_order_test(&b);
secp256k1_ecmult_const(&res1, &secp256k1_ge_const_g, &a);
secp256k1_ecmult_const(&res2, &secp256k1_ge_const_g, &b);
secp256k1_ecmult_const(&res1, &secp256k1_ge_const_g, &a, 256);
secp256k1_ecmult_const(&res2, &secp256k1_ge_const_g, &b, 256);
secp256k1_ge_set_gej(&mid1, &res1);
secp256k1_ge_set_gej(&mid2, &res2);
secp256k1_ecmult_const(&res1, &mid1, &b);
secp256k1_ecmult_const(&res2, &mid2, &a);
secp256k1_ecmult_const(&res1, &mid1, &b, 256);
secp256k1_ecmult_const(&res2, &mid2, &a, 256);
secp256k1_ge_set_gej(&mid1, &res1);
secp256k1_ge_set_gej(&mid2, &res2);
ge_equals_ge(&mid1, &mid2);
@@ -2480,13 +2480,13 @@ void ecmult_const_mult_zero_one(void) {
secp256k1_scalar_negate(&negone, &one);
random_group_element_test(&point);
secp256k1_ecmult_const(&res1, &point, &zero);
secp256k1_ecmult_const(&res1, &point, &zero, 3);
secp256k1_ge_set_gej(&res2, &res1);
CHECK(secp256k1_ge_is_infinity(&res2));
secp256k1_ecmult_const(&res1, &point, &one);
secp256k1_ecmult_const(&res1, &point, &one, 2);
secp256k1_ge_set_gej(&res2, &res1);
ge_equals_ge(&res2, &point);
secp256k1_ecmult_const(&res1, &point, &negone);
secp256k1_ecmult_const(&res1, &point, &negone, 256);
secp256k1_gej_neg(&res1, &res1);
secp256k1_ge_set_gej(&res2, &res1);
ge_equals_ge(&res2, &point);
@@ -2512,7 +2512,7 @@ void ecmult_const_chain_multiply(void) {
for (i = 0; i < 100; ++i) {
secp256k1_ge tmp;
secp256k1_ge_set_gej(&tmp, &point);
secp256k1_ecmult_const(&point, &tmp, &scalar);
secp256k1_ecmult_const(&point, &tmp, &scalar, 256);
}
secp256k1_ge_set_gej(&res, &point);
ge_equals_gej(&res, &expected_point);
@@ -2968,6 +2968,7 @@ void test_constant_wnaf(const secp256k1_scalar *number, int w) {
int wnaf[256] = {0};
int i;
int skew;
int bits = 256;
secp256k1_scalar num = *number;
secp256k1_scalar_set_int(&x, 0);
@@ -2977,10 +2978,11 @@ void test_constant_wnaf(const secp256k1_scalar *number, int w) {
for (i = 0; i < 16; ++i) {
secp256k1_scalar_shr_int(&num, 8);
}
bits = 128;
#endif
skew = secp256k1_wnaf_const(wnaf, num, w);
skew = secp256k1_wnaf_const(wnaf, num, w, bits);
for (i = WNAF_SIZE(w); i >= 0; --i) {
for (i = WNAF_SIZE_BITS(bits, w); i >= 0; --i) {
secp256k1_scalar t;
int v = wnaf[i];
CHECK(v != 0); /* check nonzero */