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tests: add tests for KeyPair
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Reuse existing BIP340 tests, as there should be
no behavior change between the two
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josibake committed Jul 16, 2024
1 parent a76cc36 commit 5e9f4f4
Showing 1 changed file with 14 additions and 0 deletions.
14 changes: 14 additions & 0 deletions src/test/key_tests.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
#include <uint256.h>
#include <util/strencodings.h>
#include <util/string.h>
#include <secp256k1_extrakeys.h>

#include <string>
#include <vector>
Expand Down Expand Up @@ -299,6 +300,13 @@ BOOST_AUTO_TEST_CASE(bip340_test_vectors)
// Verify those signatures for good measure.
BOOST_CHECK(pubkey.VerifySchnorr(msg256, sig64));

// Repeat the same check, but use the KeyPair directly without any merkle tweak
KeyPair keypair = key.ComputeKeyPair(/*merkle_root=*/nullptr);
bool kp_ok = keypair.SignSchnorr(msg256, sig64, aux256);
BOOST_CHECK(kp_ok);
BOOST_CHECK(pubkey.VerifySchnorr(msg256, sig64));
BOOST_CHECK(std::vector<unsigned char>(sig64, sig64 + 64) == sig);

// Do 10 iterations where we sign with a random Merkle root to tweak,
// and compare against the resulting tweaked keys, with random aux.
// In iteration i=0 we tweak with empty Merkle tree.
Expand All @@ -312,6 +320,12 @@ BOOST_AUTO_TEST_CASE(bip340_test_vectors)
bool ok = key.SignSchnorr(msg256, sig64, &merkle_root, aux256);
BOOST_CHECK(ok);
BOOST_CHECK(tweaked_key.VerifySchnorr(msg256, sig64));

// Repeat the same check, but use the KeyPair class directly
KeyPair keypair = key.ComputeKeyPair(&merkle_root);
bool kp_ok = keypair.SignSchnorr(msg256, sig64, aux256);
BOOST_CHECK(kp_ok);
BOOST_CHECK(tweaked_key.VerifySchnorr(msg256, sig64));
}
}
}
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