Merge pull request #9000 from SomberNight/202404_ecc_schnorr
ecc: add bindings for schnorr sign/verify, and refactor
This commit is contained in:
ThomasV
@@ -163,7 +163,7 @@ class Test_bitcoin(ElectrumTestCase):
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for message in [b"Chancellor on brink of second bailout for banks", b'\xff'*512]:
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self._do_test_crypto(message)
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def _do_test_crypto(self, message):
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def _do_test_crypto(self, message: bytes):
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G = ecc.GENERATOR
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_r = G.order()
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pvk = randrange(_r)
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@@ -186,9 +186,9 @@ class Test_bitcoin(ElectrumTestCase):
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dec2 = eck.decrypt_message(enc)
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self.assertEqual(message, dec2)
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signature = eck.sign_message(message, True)
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#print signature
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self.assertTrue(eck.verify_message_for_address(signature, message))
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msg32 = sha256d(ecc.usermessage_magic(message))
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sig65 = eck.ecdsa_sign_recoverable(msg32, is_compressed=True)
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self.assertTrue(eck.ecdsa_verify_recoverable(sig65, msg32))
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def test_ecc_sanity(self):
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G = ecc.GENERATOR
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@@ -221,7 +221,7 @@ class Test_bitcoin(ElectrumTestCase):
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def sign_message_with_wif_privkey(wif_privkey: str, msg: bytes) -> bytes:
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txin_type, privkey, compressed = deserialize_privkey(wif_privkey)
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key = ecc.ECPrivkey(privkey)
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return key.sign_message(msg, compressed)
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return key.ecdsa_sign_usermessage(msg, is_compressed=compressed)
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def test_signmessage_legacy_address(self):
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msg1 = b'Chancellor on brink of second bailout for banks'
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@@ -240,11 +240,11 @@ class Test_bitcoin(ElectrumTestCase):
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self.assertEqual(sig1_b64, b'Hzsu0U/THAsPz/MSuXGBKSULz2dTfmrg1NsAhFp+wH5aKfmX4Db7ExLGa7FGn0m6Mf43KsbEOWpvUUUBTM3Uusw=')
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self.assertEqual(sig2_b64, b'HBQdYfv7kOrxmRewLJnG7sV6KlU71O04hUnE4tai97p7Pg+D+yKaWXsdGgHTrKw90caQMo/D6b//qX50ge9P9iI=')
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self.assertTrue(ecc.verify_message_with_address(addr1, sig1, msg1))
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self.assertTrue(ecc.verify_message_with_address(addr2, sig2, msg2))
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self.assertTrue(ecc.verify_usermessage_with_address(addr1, sig1, msg1))
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self.assertTrue(ecc.verify_usermessage_with_address(addr2, sig2, msg2))
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self.assertFalse(ecc.verify_message_with_address(addr1, b'wrong', msg1))
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self.assertFalse(ecc.verify_message_with_address(addr1, sig2, msg1))
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self.assertFalse(ecc.verify_usermessage_with_address(addr1, b'wrong', msg1))
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self.assertFalse(ecc.verify_usermessage_with_address(addr1, sig2, msg1))
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def test_signmessage_segwit_witness_v0_address(self):
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msg = b'Electrum'
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@@ -252,14 +252,14 @@ class Test_bitcoin(ElectrumTestCase):
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sig1 = self.sign_message_with_wif_privkey("p2wpkh-p2sh:L1cgMEnShp73r9iCukoPE3MogLeueNYRD9JVsfT1zVHyPBR3KqBY", msg)
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addr1 = "3DYoBqQ5N6dADzyQjy9FT1Ls4amiYVaqTG"
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self.assertEqual(base64.b64encode(sig1), b'HyFaND+87TtVbRhkTfT3mPNBCQcJ32XXtNZGW8sFldJsNpOPCegEmdcCf5Thy18hdMH88GLxZLkOby/EwVUuSeA=')
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self.assertTrue(ecc.verify_message_with_address(addr1, sig1, msg))
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self.assertFalse(ecc.verify_message_with_address(addr1, sig1, b'heyheyhey'))
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self.assertTrue(ecc.verify_usermessage_with_address(addr1, sig1, msg))
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self.assertFalse(ecc.verify_usermessage_with_address(addr1, sig1, b'heyheyhey'))
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# p2wpkh
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sig2 = self.sign_message_with_wif_privkey("p2wpkh:L1cgMEnShp73r9iCukoPE3MogLeueNYRD9JVsfT1zVHyPBR3KqBY", msg)
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addr2 = "bc1qq2tmmcngng78nllq2pvrkchcdukemtj56uyue0"
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self.assertEqual(base64.b64encode(sig2), b'HyFaND+87TtVbRhkTfT3mPNBCQcJ32XXtNZGW8sFldJsNpOPCegEmdcCf5Thy18hdMH88GLxZLkOby/EwVUuSeA=')
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self.assertTrue(ecc.verify_message_with_address(addr2, sig2, msg))
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self.assertFalse(ecc.verify_message_with_address(addr2, sig2, b'heyheyhey'))
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self.assertTrue(ecc.verify_usermessage_with_address(addr2, sig2, msg))
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self.assertFalse(ecc.verify_usermessage_with_address(addr2, sig2, b'heyheyhey'))
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def test_signmessage_segwit_witness_v0_address_test_we_also_accept_sigs_from_trezor(self):
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"""Trezor and some other projects use a slightly different scheme for message-signing
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@@ -272,13 +272,13 @@ class Test_bitcoin(ElectrumTestCase):
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addr2 = "bc1qannfxke2tfd4l7vhepehpvt05y83v3qsf6nfkk"
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sig1 = bytes.fromhex("23744de4516fac5c140808015664516a32fead94de89775cec7e24dbc24fe133075ac09301c4cc8e197bea4b6481661d5b8e9bf19d8b7b8a382ecdb53c2ee0750d")
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sig2 = bytes.fromhex("28b55d7600d9e9a7e2a49155ddf3cfdb8e796c207faab833010fa41fb7828889bc47cf62348a7aaa0923c0832a589fab541e8f12eb54fb711c90e2307f0f66b194")
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self.assertTrue(ecc.verify_message_with_address(address=addr1, sig65=sig1, message=msg))
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self.assertTrue(ecc.verify_message_with_address(address=addr2, sig65=sig2, message=msg))
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self.assertTrue(ecc.verify_usermessage_with_address(address=addr1, sig65=sig1, message=msg))
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self.assertTrue(ecc.verify_usermessage_with_address(address=addr2, sig65=sig2, message=msg))
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# if there is type information in the header of the sig (first byte), enforce that:
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sig1_wrongtype = bytes.fromhex("27744de4516fac5c140808015664516a32fead94de89775cec7e24dbc24fe133075ac09301c4cc8e197bea4b6481661d5b8e9bf19d8b7b8a382ecdb53c2ee0750d")
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sig2_wrongtype = bytes.fromhex("24b55d7600d9e9a7e2a49155ddf3cfdb8e796c207faab833010fa41fb7828889bc47cf62348a7aaa0923c0832a589fab541e8f12eb54fb711c90e2307f0f66b194")
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self.assertFalse(ecc.verify_message_with_address(address=addr1, sig65=sig1_wrongtype, message=msg))
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self.assertFalse(ecc.verify_message_with_address(address=addr2, sig65=sig2_wrongtype, message=msg))
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self.assertFalse(ecc.verify_usermessage_with_address(address=addr1, sig65=sig1_wrongtype, message=msg))
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self.assertFalse(ecc.verify_usermessage_with_address(address=addr2, sig65=sig2_wrongtype, message=msg))
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@needs_test_with_all_aes_implementations
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def test_decrypt_message(self):
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@@ -303,17 +303,20 @@ class Test_bitcoin(ElectrumTestCase):
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def test_sign_transaction(self):
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eckey1 = ecc.ECPrivkey(bfh('7e1255fddb52db1729fc3ceb21a46f95b8d9fe94cc83425e936a6c5223bb679d'))
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sig1 = eckey1.sign_transaction(bfh('5a548b12369a53faaa7e51b5081829474ebdd9c924b3a8230b69aa0be254cd94'))
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sig1 = eckey1.ecdsa_sign(bfh('5a548b12369a53faaa7e51b5081829474ebdd9c924b3a8230b69aa0be254cd94'),
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sigencode=ecc.ecdsa_der_sig_from_r_and_s)
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self.assertEqual('3044022066e7d6a954006cce78a223f5edece8aaedcf3607142e9677acef1cfcb91cfdde022065cb0b5401bf16959ce7b785ea7fd408be5e4cb7d8f1b1a32c78eac6f73678d9', sig1.hex())
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eckey2 = ecc.ECPrivkey(bfh('c7ce8c1462c311eec24dff9e2532ac6241e50ae57e7d1833af21942136972f23'))
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sig2 = eckey2.sign_transaction(bfh('642a2e66332f507c92bda910158dfe46fc10afbf72218764899d3af99a043fac'))
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sig2 = eckey2.ecdsa_sign(bfh('642a2e66332f507c92bda910158dfe46fc10afbf72218764899d3af99a043fac'),
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sigencode=ecc.ecdsa_der_sig_from_r_and_s)
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self.assertEqual('30440220618513f4cfc87dde798ce5febae7634c23e7b9254a1eabf486be820f6a7c2c4702204fef459393a2b931f949e63ced06888f35e286e446dc46feb24b5b5f81c6ed52', sig2.hex())
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@disable_ecdsa_r_value_grinding
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def test_sign_transaction_without_ecdsa_r_value_grinding(self):
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eckey1 = ecc.ECPrivkey(bfh('7e1255fddb52db1729fc3ceb21a46f95b8d9fe94cc83425e936a6c5223bb679d'))
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sig1 = eckey1.sign_transaction(bfh('5a548b12369a53faaa7e51b5081829474ebdd9c924b3a8230b69aa0be254cd94'))
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sig1 = eckey1.ecdsa_sign(bfh('5a548b12369a53faaa7e51b5081829474ebdd9c924b3a8230b69aa0be254cd94'),
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sigencode=ecc.ecdsa_der_sig_from_r_and_s)
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self.assertEqual('3045022100902a288b98392254cd23c0e9a49ac6d7920f171b8249a48e484b998f1874a2010220723d844826828f092cf400cb210c4fa0b8cd1b9d1a7f21590e78e022ff6476b9', sig1.hex())
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@needs_test_with_all_aes_implementations
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118
tests/test_ecc.py
Normal file
118
tests/test_ecc.py
Normal file
@@ -0,0 +1,118 @@
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import csv
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from ctypes import (
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c_int, c_char_p, c_size_t, c_void_p, create_string_buffer,
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)
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import io
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from electrum import ecc
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from electrum.ecc import ECPubkey, ECPrivkey
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from electrum.ecc_fast import _libsecp256k1
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from electrum import crypto
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from electrum.crypto import sha256
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from . import ElectrumTestCase
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# note: lots of ecc-related tests are in test_bitcoin.py.
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class TestSchnorr(ElectrumTestCase):
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def test_vectors_from_bip0340(self):
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bip0340_vectors = """index,secret key,public key,aux_rand,message,signature,verification result,comment
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0,0000000000000000000000000000000000000000000000000000000000000003,F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9,0000000000000000000000000000000000000000000000000000000000000000,0000000000000000000000000000000000000000000000000000000000000000,E907831F80848D1069A5371B402410364BDF1C5F8307B0084C55F1CE2DCA821525F66A4A85EA8B71E482A74F382D2CE5EBEEE8FDB2172F477DF4900D310536C0,TRUE,
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1,B7E151628AED2A6ABF7158809CF4F3C762E7160F38B4DA56A784D9045190CFEF,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,0000000000000000000000000000000000000000000000000000000000000001,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,6896BD60EEAE296DB48A229FF71DFE071BDE413E6D43F917DC8DCF8C78DE33418906D11AC976ABCCB20B091292BFF4EA897EFCB639EA871CFA95F6DE339E4B0A,TRUE,
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2,C90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B14E5C9,DD308AFEC5777E13121FA72B9CC1B7CC0139715309B086C960E18FD969774EB8,C87AA53824B4D7AE2EB035A2B5BBBCCC080E76CDC6D1692C4B0B62D798E6D906,7E2D58D8B3BCDF1ABADEC7829054F90DDA9805AAB56C77333024B9D0A508B75C,5831AAEED7B44BB74E5EAB94BA9D4294C49BCF2A60728D8B4C200F50DD313C1BAB745879A5AD954A72C45A91C3A51D3C7ADEA98D82F8481E0E1E03674A6F3FB7,TRUE,
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3,0B432B2677937381AEF05BB02A66ECD012773062CF3FA2549E44F58ED2401710,25D1DFF95105F5253C4022F628A996AD3A0D95FBF21D468A1B33F8C160D8F517,FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,7EB0509757E246F19449885651611CB965ECC1A187DD51B64FDA1EDC9637D5EC97582B9CB13DB3933705B32BA982AF5AF25FD78881EBB32771FC5922EFC66EA3,TRUE,test fails if msg is reduced modulo p or n
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4,,D69C3509BB99E412E68B0FE8544E72837DFA30746D8BE2AA65975F29D22DC7B9,,4DF3C3F68FCC83B27E9D42C90431A72499F17875C81A599B566C9889B9696703,00000000000000000000003B78CE563F89A0ED9414F5AA28AD0D96D6795F9C6376AFB1548AF603B3EB45C9F8207DEE1060CB71C04E80F593060B07D28308D7F4,TRUE,
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5,,EEFDEA4CDB677750A420FEE807EACF21EB9898AE79B9768766E4FAA04A2D4A34,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B,FALSE,public key not on the curve
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6,,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,FFF97BD5755EEEA420453A14355235D382F6472F8568A18B2F057A14602975563CC27944640AC607CD107AE10923D9EF7A73C643E166BE5EBEAFA34B1AC553E2,FALSE,has_even_y(R) is false
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7,,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,1FA62E331EDBC21C394792D2AB1100A7B432B013DF3F6FF4F99FCB33E0E1515F28890B3EDB6E7189B630448B515CE4F8622A954CFE545735AAEA5134FCCDB2BD,FALSE,negated message
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8,,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769961764B3AA9B2FFCB6EF947B6887A226E8D7C93E00C5ED0C1834FF0D0C2E6DA6,FALSE,negated s value
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9,,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,0000000000000000000000000000000000000000000000000000000000000000123DDA8328AF9C23A94C1FEECFD123BA4FB73476F0D594DCB65C6425BD186051,FALSE,sG - eP is infinite. Test fails in single verification if has_even_y(inf) is defined as true and x(inf) as 0
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10,,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,00000000000000000000000000000000000000000000000000000000000000017615FBAF5AE28864013C099742DEADB4DBA87F11AC6754F93780D5A1837CF197,FALSE,sG - eP is infinite. Test fails in single verification if has_even_y(inf) is defined as true and x(inf) as 1
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11,,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,4A298DACAE57395A15D0795DDBFD1DCB564DA82B0F269BC70A74F8220429BA1D69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B,FALSE,sig[0:32] is not an X coordinate on the curve
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12,,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B,FALSE,sig[0:32] is equal to field size
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13,,DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141,FALSE,sig[32:64] is equal to curve order
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14,,FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30,,243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89,6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B,FALSE,public key is not a valid X coordinate because it exceeds the field size
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"""
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with io.StringIO(bip0340_vectors) as f:
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csvreader = csv.reader(f)
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next(csvreader) # skip first line
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for idx, seckey, pubkey, aux_rand, message, signature, expected_res, comment in csvreader:
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idx = int(idx)
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with self.subTest(msg=f"{idx=}"):
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try:
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pubkey = ECPubkey(bytes.fromhex("02" + pubkey))
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except ecc.InvalidECPointException:
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if idx in (5, 14, ): # expected for these tests
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continue
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raise
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msg32 = bytes.fromhex(message)
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signature = bytes.fromhex(signature)
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if seckey:
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seckey = ECPrivkey(bytes.fromhex(seckey))
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aux_rand = bytes.fromhex(aux_rand)
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sig_created = seckey.schnorr_sign(msg32, aux_rand32=aux_rand)
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self.assertEqual(signature, sig_created)
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is_sig_good = pubkey.schnorr_verify(signature, msg32)
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expected_res = True if expected_res == "TRUE" else False
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self.assertEqual(expected_res, is_sig_good)
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def test_sign_schnorr_aux_rand(self):
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seckey = ECPrivkey(bytes.fromhex("B7E151628AED2A6ABF7158809CF4F3C762E7160F38B4DA56A784D9045190CFEF"))
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msg32 = sha256("hello there")
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sig1 = seckey.schnorr_sign(msg32, aux_rand32=None)
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sig2 = seckey.schnorr_sign(msg32, aux_rand32=b"\x00" * 32)
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self.assertEqual(sig1, sig2)
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sig3 = seckey.schnorr_sign(msg32, aux_rand32=bytes(range(32)))
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self.assertNotEqual(sig1, sig3)
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def test_y_parity_malleability(self):
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# BIP-0340 says:
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# > A hypothetical verification algorithm that treats points as public keys,
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# > and takes the point P directly as input would fail any time a point with
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# > odd Y is used. While it is possible to correct for this by negating points
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# > with odd Y coordinate before further processing, this would result in a scheme
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# > where every (message, signature) pair is valid for two public keys (a type of
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# > malleability that exists for ECDSA as well, but we don't wish to retain).
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# > We avoid these problems by treating just the X coordinate as public key.
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#
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# As the API in ecc.py treats points as public keys, this malleability exists here:
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seckey = ECPrivkey.from_secret_scalar(1337)
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pubkey1 = ECPubkey(seckey.get_public_key_bytes())
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pubkey2 = ecc.CURVE_ORDER * ecc.GENERATOR + (-1) * pubkey1
|
||||
self.assertNotEqual(pubkey1.get_public_key_bytes(True), pubkey2.get_public_key_bytes(True))
|
||||
self.assertEqual(pubkey1.get_public_key_bytes(True)[1:], pubkey2.get_public_key_bytes(True)[1:])
|
||||
msg32 = sha256("hello there")
|
||||
sig = seckey.schnorr_sign(msg32, aux_rand32=None)
|
||||
self.assertTrue(pubkey1.schnorr_verify(sig, msg32))
|
||||
self.assertTrue(pubkey2.schnorr_verify(sig, msg32))
|
||||
|
||||
def test_bip340_tagged_hash(self):
|
||||
try:
|
||||
_libsecp256k1.secp256k1_tagged_sha256.argtypes = [c_void_p, c_char_p, c_char_p, c_size_t, c_char_p, c_size_t]
|
||||
_libsecp256k1.secp256k1_tagged_sha256.restype = c_int
|
||||
except (OSError, AttributeError):
|
||||
raise Exception('libsecp256k1 library too old: missing secp256k1_tagged_sha256 method')
|
||||
|
||||
def bip340_tagged_hash__from_libsecp(tag: bytes, msg: bytes) -> bytes:
|
||||
assert isinstance(tag, bytes), type(tag)
|
||||
assert isinstance(msg, bytes), type(msg)
|
||||
thash = create_string_buffer(32)
|
||||
ret = _libsecp256k1.secp256k1_tagged_sha256(
|
||||
_libsecp256k1.ctx, thash, tag, len(tag), msg, len(msg))
|
||||
assert 1 == ret, ret
|
||||
thash = bytes(thash)
|
||||
return thash
|
||||
|
||||
data = (
|
||||
(b"", b""),
|
||||
(b"", b"hello there"),
|
||||
(b"mytag", b""),
|
||||
(b"mytag", b"hello there"),
|
||||
(bytes(range(256)) * 10, bytes(range(256)) * 50),
|
||||
(bytes(range(256)) * 1000, bytes(range(256)) * 5000),
|
||||
)
|
||||
for tag, msg in data:
|
||||
self.assertEqual(bip340_tagged_hash__from_libsecp(tag, msg),
|
||||
ecc.bip340_tagged_hash(tag, msg))
|
||||
Reference in New Issue
Block a user