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test: introduce group order byte-array constant for deduplication

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Sebastian Falbesoner
2025-09-12 03:53:06 +02:00
parent 88be4e8d86
commit 0c91c56041
3 changed files with 13 additions and 25 deletions
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8
src/modules/ecdh/tests_impl.h
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@@ -90,12 +90,7 @@ static void test_ecdh_generator_basepoint(void) {
static void test_bad_scalar(void) {
unsigned char s_zero[32] = { 0 };
unsigned char s_overflow[32] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe,
0xba, 0xae, 0xdc, 0xe6, 0xaf, 0x48, 0xa0, 0x3b,
0xbf, 0xd2, 0x5e, 0x8c, 0xd0, 0x36, 0x41, 0x41
};
unsigned char s_overflow[32] = { 0 };
unsigned char s_rand[32] = { 0 };
unsigned char output[32];
secp256k1_scalar rand;
@@ -107,6 +102,7 @@ static void test_bad_scalar(void) {
CHECK(secp256k1_ec_pubkey_create(CTX, &point, s_rand) == 1);
/* Try to multiply it by bad values */
memcpy(s_overflow, secp256k1_group_order_bytes, 32);
CHECK(secp256k1_ecdh(CTX, output, &point, s_zero, NULL, NULL) == 0);
CHECK(secp256k1_ecdh(CTX, output, &point, s_overflow, NULL, NULL) == 0);
/* ...and a good one */