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surjectionproof: add test vectors for "set padding bits"

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This commit is contained in:
Andrew Poelstra 2019-06-03 21:45:48 +00:00
parent 7bc3daa482
commit 290a27bb75
1 changed files with 20 additions and 0 deletions
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20
src/modules/surjection/tests_impl.h
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@ -603,6 +603,8 @@ void test_fixed_vectors(void) {
};
const size_t total5_used5_len = sizeof(total5_used5);
unsigned char bad[sizeof(total5_used5) + 32] = { 0 };
secp256k1_generator input_tags[5];
secp256k1_generator output_tag;
secp256k1_surjectionproof proof;
@ -636,6 +638,24 @@ void test_fixed_vectors(void) {
CHECK(secp256k1_surjectionproof_parse(ctx, &proof, total1_used1, total1_used1_len));
CHECK(!secp256k1_surjectionproof_verify(ctx, &proof, &input_tags[1], 1, &output_tag));
CHECK(!secp256k1_surjectionproof_verify(ctx, &proof, input_tags, 1, &input_tags[0]));
/* Try setting 6 bits on the total5-used-5; check that parsing fails */
memcpy(bad, total5_used5, total5_used5_len);
bad[2] = 0x3f; /* 0x1f -> 0x3f */
CHECK(!secp256k1_surjectionproof_parse(ctx, &proof, bad, total5_used5_len));
/* Correct for the length */
CHECK(secp256k1_surjectionproof_parse(ctx, &proof, bad, total5_used5_len + 32)); /* FIXME */
/* Alternately just turn off one of the "legit" bits */
bad[2] = 0x37; /* 0x1f -> 0x37 */
CHECK(secp256k1_surjectionproof_parse(ctx, &proof, bad, total5_used5_len)); /* FIXME */
/* Similarly try setting 4 bits on the total5-used-3, with one bit out of range */
memcpy(bad, total5_used3, total5_used3_len);
bad[2] = 0x35; /* 0x15 -> 0x35 */
CHECK(!secp256k1_surjectionproof_parse(ctx, &proof, bad, total5_used3_len));
CHECK(secp256k1_surjectionproof_parse(ctx, &proof, bad, total5_used3_len + 32)); /* FIXME */
bad[2] = 0x34; /* 0x15 -> 0x34 */
CHECK(secp256k1_surjectionproof_parse(ctx, &proof, bad, total5_used3_len)); /* FIXME */
}
void run_surjection_tests(void) {