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48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
from common import *
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from trezor.crypto import random
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from trezor.crypto.curve import ed25519
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class TestCryptoEd25519Cosi(unittest.TestCase):
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def test_cosi(self):
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for N in range(1, 11):
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# generate random message to be signed
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msg = random.bytes(128)
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# phase 0: create priv/pubkeys and combine pubkeys
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keys = [None] * N
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pubkeys = [None] * N
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for j in range(N):
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keys[j] = ed25519.generate_secret()
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pubkeys[j] = ed25519.publickey(keys[j])
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pubkey = ed25519.cosi_combine_publickeys(pubkeys)
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# phase 1: create nonces, commitments (R values) and combine commitments
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nonces = [None] * N
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Rs = [None] * N
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for j in range(N):
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nonces[j] = ed25519.generate_secret()
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Rs[j] = ed25519.publickey(nonces[j])
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R = ed25519.cosi_combine_publickeys(Rs)
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# phase 2: sign and combine signatures
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sigs = [None] * N
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for j in range(N):
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sigs[j] = ed25519.cosi_sign(keys[j], msg, nonces[j], R, pubkey)
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sig = ed25519.cosi_combine_signatures(R, sigs)
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# check signature using normal ed25519.verify
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res = ed25519.verify(pubkey, sig, msg)
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self.assertTrue(res)
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if __name__ == '__main__':
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unittest.main()
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