543 lines
21 KiB
Python
543 lines
21 KiB
Python
"""
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BLS test vectors generator
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"""
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from hashlib import sha256
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from typing import Tuple, Iterable, Any, Callable, Dict
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from eth_utils import (
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encode_hex,
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int_to_big_endian,
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)
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import milagro_bls_binding as milagro_bls
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from eth2spec.utils import bls
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from eth2spec.test.helpers.constants import PHASE0, ALTAIR
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from eth2spec.test.helpers.typing import SpecForkName
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from eth2spec.gen_helpers.gen_base import gen_runner, gen_typing
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from eth2spec.altair import spec
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def to_bytes(i):
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return i.to_bytes(32, "big")
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def hash(x):
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return sha256(x).digest()
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def int_to_hex(n: int, byte_length: int = None) -> str:
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byte_value = int_to_big_endian(n)
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if byte_length:
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byte_value = byte_value.rjust(byte_length, b'\x00')
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return encode_hex(byte_value)
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def hex_to_int(x: str) -> int:
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return int(x, 16)
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MESSAGES = [
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bytes(b'\x00' * 32),
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bytes(b'\x56' * 32),
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bytes(b'\xab' * 32),
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]
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SAMPLE_MESSAGE = b'\x12' * 32
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PRIVKEYS = [
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# Curve order is 256, so private keys use 32 bytes at most.
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# Also, not all integers are valid private keys. Therefore, using pre-generated keys.
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hex_to_int('0x00000000000000000000000000000000263dbd792f5b1be47ed85f8938c0f29586af0d3ac7b977f21c278fe1462040e3'),
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hex_to_int('0x0000000000000000000000000000000047b8192d77bf871b62e87859d653922725724a5c031afeabc60bcef5ff665138'),
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hex_to_int('0x00000000000000000000000000000000328388aff0d4a5b7dc9205abd374e7e98f3cd9f3418edb4eafda5fb16473d216'),
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]
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PUBKEYS = [bls.SkToPk(privkey) for privkey in PRIVKEYS]
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ZERO_PUBKEY = b'\x00' * 48
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G1_POINT_AT_INFINITY = b'\xc0' + b'\x00' * 47
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ZERO_SIGNATURE = b'\x00' * 96
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G2_POINT_AT_INFINITY = b'\xc0' + b'\x00' * 95
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ZERO_PRIVKEY = 0
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ZERO_PRIVKEY_BYTES = b'\x00' * 32
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def expect_exception(func, *args):
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try:
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func(*args)
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except Exception:
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pass
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else:
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raise Exception("should have raised exception")
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def case01_sign():
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# Valid cases
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for privkey in PRIVKEYS:
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for message in MESSAGES:
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sig = bls.Sign(privkey, message)
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assert sig == milagro_bls.Sign(to_bytes(privkey), message) # double-check with milagro
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identifier = f'{int_to_hex(privkey)}_{encode_hex(message)}'
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yield f'sign_case_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'privkey': int_to_hex(privkey),
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'message': encode_hex(message),
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},
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'output': encode_hex(sig)
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}
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# Edge case: privkey == 0
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expect_exception(bls.Sign, ZERO_PRIVKEY, message)
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expect_exception(milagro_bls.Sign, ZERO_PRIVKEY_BYTES, message)
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yield 'sign_case_zero_privkey', {
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'input': {
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'privkey': encode_hex(ZERO_PRIVKEY_BYTES),
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'message': encode_hex(message),
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},
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'output': None
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}
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def case02_verify():
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for i, privkey in enumerate(PRIVKEYS):
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for message in MESSAGES:
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# Valid signature
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signature = bls.Sign(privkey, message)
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pubkey = bls.SkToPk(privkey)
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assert milagro_bls.SkToPk(to_bytes(privkey)) == pubkey
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assert milagro_bls.Sign(to_bytes(privkey), message) == signature
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identifier = f'{encode_hex(pubkey)}_{encode_hex(message)}'
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assert bls.Verify(pubkey, message, signature)
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assert milagro_bls.Verify(pubkey, message, signature)
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yield f'verify_valid_case_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'pubkey': encode_hex(pubkey),
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'message': encode_hex(message),
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'signature': encode_hex(signature),
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},
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'output': True,
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}
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# Invalid signatures -- wrong pubkey
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wrong_pubkey = bls.SkToPk(PRIVKEYS[(i + 1) % len(PRIVKEYS)])
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identifier = f'{encode_hex(wrong_pubkey)}_{encode_hex(message)}'
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assert not bls.Verify(wrong_pubkey, message, signature)
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assert not milagro_bls.Verify(wrong_pubkey, message, signature)
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yield f'verify_wrong_pubkey_case_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'pubkey': encode_hex(wrong_pubkey),
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'message': encode_hex(message),
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'signature': encode_hex(signature),
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},
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'output': False,
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}
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# Invalid signature -- tampered with signature
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tampered_signature = signature[:-4] + b'\xFF\xFF\xFF\xFF'
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identifier = f'{encode_hex(pubkey)}_{encode_hex(message)}'
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assert not bls.Verify(pubkey, message, tampered_signature)
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assert not milagro_bls.Verify(pubkey, message, tampered_signature)
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yield f'verify_tampered_signature_case_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'pubkey': encode_hex(pubkey),
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'message': encode_hex(message),
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'signature': encode_hex(tampered_signature),
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},
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'output': False,
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}
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# Invalid pubkey and signature with the point at infinity
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assert not bls.Verify(G1_POINT_AT_INFINITY, SAMPLE_MESSAGE, G2_POINT_AT_INFINITY)
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assert not milagro_bls.Verify(G1_POINT_AT_INFINITY, SAMPLE_MESSAGE, G2_POINT_AT_INFINITY)
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yield 'verify_infinity_pubkey_and_infinity_signature', {
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'input': {
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'pubkey': encode_hex(G1_POINT_AT_INFINITY),
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'message': encode_hex(SAMPLE_MESSAGE),
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'signature': encode_hex(G2_POINT_AT_INFINITY),
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},
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'output': False,
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}
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def case03_aggregate():
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for message in MESSAGES:
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sigs = [bls.Sign(privkey, message) for privkey in PRIVKEYS]
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aggregate_sig = bls.Aggregate(sigs)
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assert aggregate_sig == milagro_bls.Aggregate(sigs)
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yield f'aggregate_{encode_hex(message)}', {
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'input': [encode_hex(sig) for sig in sigs],
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'output': encode_hex(aggregate_sig),
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}
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# Invalid pubkeys -- len(pubkeys) == 0
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expect_exception(bls.Aggregate, [])
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# No signatures to aggregate. Follow IETF BLS spec, return `None` to represent INVALID.
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# https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04#section-2.8
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yield 'aggregate_na_signatures', {
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'input': [],
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'output': None,
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}
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# Valid to aggregate G2 point at infinity
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aggregate_sig = bls.Aggregate([G2_POINT_AT_INFINITY])
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assert aggregate_sig == milagro_bls.Aggregate([G2_POINT_AT_INFINITY]) == G2_POINT_AT_INFINITY
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yield 'aggregate_infinity_signature', {
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'input': [encode_hex(G2_POINT_AT_INFINITY)],
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'output': encode_hex(aggregate_sig),
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}
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def case04_fast_aggregate_verify():
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for i, message in enumerate(MESSAGES):
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privkeys = PRIVKEYS[:i + 1]
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sigs = [bls.Sign(privkey, message) for privkey in privkeys]
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aggregate_signature = bls.Aggregate(sigs)
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pubkeys = [bls.SkToPk(privkey) for privkey in privkeys]
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pubkeys_serial = [encode_hex(pubkey) for pubkey in pubkeys]
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# Valid signature
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identifier = f'{pubkeys_serial}_{encode_hex(message)}'
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assert bls.FastAggregateVerify(pubkeys, message, aggregate_signature)
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assert milagro_bls.FastAggregateVerify(pubkeys, message, aggregate_signature)
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yield f'fast_aggregate_verify_valid_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'pubkeys': pubkeys_serial,
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'message': encode_hex(message),
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'signature': encode_hex(aggregate_signature),
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},
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'output': True,
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}
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# Invalid signature -- extra pubkey
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pubkeys_extra = pubkeys + [bls.SkToPk(PRIVKEYS[-1])]
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pubkeys_extra_serial = [encode_hex(pubkey) for pubkey in pubkeys_extra]
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identifier = f'{pubkeys_extra_serial}_{encode_hex(message)}'
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assert not bls.FastAggregateVerify(pubkeys_extra, message, aggregate_signature)
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assert not milagro_bls.FastAggregateVerify(pubkeys_extra, message, aggregate_signature)
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yield f'fast_aggregate_verify_extra_pubkey_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'pubkeys': pubkeys_extra_serial,
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'message': encode_hex(message),
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'signature': encode_hex(aggregate_signature),
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},
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'output': False,
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}
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# Invalid signature -- tampered with signature
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tampered_signature = aggregate_signature[:-4] + b'\xff\xff\xff\xff'
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identifier = f'{pubkeys_serial}_{encode_hex(message)}'
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assert not bls.FastAggregateVerify(pubkeys, message, tampered_signature)
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assert not milagro_bls.FastAggregateVerify(pubkeys, message, tampered_signature)
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yield f'fast_aggregate_verify_tampered_signature_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'pubkeys': pubkeys_serial,
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'message': encode_hex(message),
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'signature': encode_hex(tampered_signature),
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},
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'output': False,
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}
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# Invalid pubkeys and signature -- len(pubkeys) == 0 and signature == Z1_SIGNATURE
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assert not bls.FastAggregateVerify([], message, G2_POINT_AT_INFINITY)
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assert not milagro_bls.FastAggregateVerify([], message, G2_POINT_AT_INFINITY)
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yield 'fast_aggregate_verify_na_pubkeys_and_infinity_signature', {
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'input': {
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'pubkeys': [],
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'message': encode_hex(message),
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'signature': encode_hex(G2_POINT_AT_INFINITY),
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},
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'output': False,
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}
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# Invalid pubkeys and signature -- len(pubkeys) == 0 and signature == 0x00...
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assert not bls.FastAggregateVerify([], message, ZERO_SIGNATURE)
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assert not milagro_bls.FastAggregateVerify([], message, ZERO_SIGNATURE)
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yield 'fast_aggregate_verify_na_pubkeys_and_zero_signature', {
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'input': {
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'pubkeys': [],
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'message': encode_hex(message),
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'signature': encode_hex(ZERO_SIGNATURE),
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},
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'output': False,
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}
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# Invalid pubkeys and signature -- pubkeys contains point at infinity
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pubkeys = PUBKEYS.copy()
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pubkeys_with_infinity = pubkeys + [G1_POINT_AT_INFINITY]
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signatures = [bls.Sign(privkey, SAMPLE_MESSAGE) for privkey in PRIVKEYS]
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aggregate_signature = bls.Aggregate(signatures)
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assert not bls.FastAggregateVerify(pubkeys_with_infinity, SAMPLE_MESSAGE, aggregate_signature)
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assert not milagro_bls.FastAggregateVerify(pubkeys_with_infinity, SAMPLE_MESSAGE, aggregate_signature)
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yield 'fast_aggregate_verify_infinity_pubkey', {
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'input': {
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'pubkeys': [encode_hex(pubkey) for pubkey in pubkeys_with_infinity],
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'message': encode_hex(SAMPLE_MESSAGE),
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'signature': encode_hex(aggregate_signature),
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},
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'output': False,
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}
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def case05_aggregate_verify():
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pubkeys = []
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pubkeys_serial = []
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messages = []
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messages_serial = []
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sigs = []
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for privkey, message in zip(PRIVKEYS, MESSAGES):
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sig = bls.Sign(privkey, message)
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pubkey = bls.SkToPk(privkey)
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pubkeys.append(pubkey)
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pubkeys_serial.append(encode_hex(pubkey))
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messages.append(message)
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messages_serial.append(encode_hex(message))
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sigs.append(sig)
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aggregate_signature = bls.Aggregate(sigs)
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assert bls.AggregateVerify(pubkeys, messages, aggregate_signature)
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assert milagro_bls.AggregateVerify(pubkeys, messages, aggregate_signature)
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yield 'aggregate_verify_valid', {
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'input': {
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'pubkeys': pubkeys_serial,
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'messages': messages_serial,
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'signature': encode_hex(aggregate_signature),
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},
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'output': True,
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}
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tampered_signature = aggregate_signature[:4] + b'\xff\xff\xff\xff'
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assert not bls.AggregateVerify(pubkey, messages, tampered_signature)
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assert not milagro_bls.AggregateVerify(pubkeys, messages, tampered_signature)
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yield 'aggregate_verify_tampered_signature', {
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'input': {
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'pubkeys': pubkeys_serial,
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'messages': messages_serial,
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'signature': encode_hex(tampered_signature),
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},
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'output': False,
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}
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# Invalid pubkeys and signature -- len(pubkeys) == 0 and signature == Z1_SIGNATURE
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assert not bls.AggregateVerify([], [], G2_POINT_AT_INFINITY)
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assert not milagro_bls.AggregateVerify([], [], G2_POINT_AT_INFINITY)
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yield 'aggregate_verify_na_pubkeys_and_infinity_signature', {
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'input': {
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'pubkeys': [],
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'messages': [],
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'signature': encode_hex(G2_POINT_AT_INFINITY),
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},
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'output': False,
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}
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# Invalid pubkeys and signature -- len(pubkeys) == 0 and signature == 0x00...
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assert not bls.AggregateVerify([], [], ZERO_SIGNATURE)
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assert not milagro_bls.AggregateVerify([], [], ZERO_SIGNATURE)
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yield 'aggregate_verify_na_pubkeys_and_zero_signature', {
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'input': {
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'pubkeys': [],
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'messages': [],
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'signature': encode_hex(ZERO_SIGNATURE),
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},
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'output': False,
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}
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# Invalid pubkeys and signature -- pubkeys contains point at infinity
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pubkeys_with_infinity = pubkeys + [G1_POINT_AT_INFINITY]
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messages_with_sample = messages + [SAMPLE_MESSAGE]
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assert not bls.AggregateVerify(pubkeys_with_infinity, messages_with_sample, aggregate_signature)
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assert not milagro_bls.AggregateVerify(pubkeys_with_infinity, messages_with_sample, aggregate_signature)
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yield 'aggregate_verify_infinity_pubkey', {
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'input': {
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'pubkeys': [encode_hex(pubkey) for pubkey in pubkeys_with_infinity],
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'messages': [encode_hex(message) for message in messages_with_sample],
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'signature': encode_hex(aggregate_signature),
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},
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'output': False,
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}
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def case06_eth_aggregate_pubkeys():
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for pubkey in PUBKEYS:
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encoded_pubkey = encode_hex(pubkey)
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aggregate_pubkey = spec.eth_aggregate_pubkeys([pubkey])
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# Should be unchanged
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assert aggregate_pubkey == milagro_bls._AggregatePKs([pubkey]) == pubkey
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# Valid pubkey
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yield f'eth_aggregate_pubkeys_valid_{(hash(bytes(encoded_pubkey, "utf-8"))[:8]).hex()}', {
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'input': [encode_hex(pubkey)],
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'output': encode_hex(aggregate_pubkey),
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}
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# Valid pubkeys
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aggregate_pubkey = spec.eth_aggregate_pubkeys(PUBKEYS)
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assert aggregate_pubkey == milagro_bls._AggregatePKs(PUBKEYS)
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yield 'eth_aggregate_pubkeys_valid_pubkeys', {
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'input': [encode_hex(pubkey) for pubkey in PUBKEYS],
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'output': encode_hex(aggregate_pubkey),
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}
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# Invalid pubkeys -- len(pubkeys) == 0
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expect_exception(spec.eth_aggregate_pubkeys, [])
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expect_exception(milagro_bls._AggregatePKs, [])
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yield 'eth_aggregate_pubkeys_empty_list', {
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'input': [],
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'output': None,
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}
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# Invalid pubkeys -- [ZERO_PUBKEY]
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expect_exception(spec.eth_aggregate_pubkeys, [ZERO_PUBKEY])
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expect_exception(milagro_bls._AggregatePKs, [ZERO_PUBKEY])
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yield 'eth_aggregate_pubkeys_zero_pubkey', {
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'input': [encode_hex(ZERO_PUBKEY)],
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'output': None,
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}
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# Invalid pubkeys -- G1 point at infinity
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expect_exception(spec.eth_aggregate_pubkeys, [G1_POINT_AT_INFINITY])
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expect_exception(milagro_bls._AggregatePKs, [G1_POINT_AT_INFINITY])
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yield 'eth_aggregate_pubkeys_infinity_pubkey', {
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'input': [encode_hex(G1_POINT_AT_INFINITY)],
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'output': None,
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}
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# Invalid pubkeys -- b'\x40\x00\x00\x00....\x00' pubkey
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x40_pubkey = b'\x40' + b'\00' * 47
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expect_exception(spec.eth_aggregate_pubkeys, [x40_pubkey])
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expect_exception(milagro_bls._AggregatePKs, [x40_pubkey])
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yield 'eth_aggregate_pubkeys_x40_pubkey', {
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'input': [encode_hex(x40_pubkey)],
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'output': None,
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}
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def case07_eth_fast_aggregate_verify():
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"""
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Similar to `case04_fast_aggregate_verify` except for the empty case
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"""
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for i, message in enumerate(MESSAGES):
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privkeys = PRIVKEYS[:i + 1]
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sigs = [bls.Sign(privkey, message) for privkey in privkeys]
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aggregate_signature = bls.Aggregate(sigs)
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pubkeys = [bls.SkToPk(privkey) for privkey in privkeys]
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pubkeys_serial = [encode_hex(pubkey) for pubkey in pubkeys]
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# Valid signature
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identifier = f'{pubkeys_serial}_{encode_hex(message)}'
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assert spec.eth_fast_aggregate_verify(pubkeys, message, aggregate_signature)
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yield f'eth_fast_aggregate_verify_valid_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'pubkeys': pubkeys_serial,
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'message': encode_hex(message),
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'signature': encode_hex(aggregate_signature),
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},
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'output': True,
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}
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# Invalid signature -- extra pubkey
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pubkeys_extra = pubkeys + [bls.SkToPk(PRIVKEYS[-1])]
|
|
pubkeys_extra_serial = [encode_hex(pubkey) for pubkey in pubkeys_extra]
|
|
identifier = f'{pubkeys_extra_serial}_{encode_hex(message)}'
|
|
assert not spec.eth_fast_aggregate_verify(pubkeys_extra, message, aggregate_signature)
|
|
yield f'eth_fast_aggregate_verify_extra_pubkey_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
|
|
'input': {
|
|
'pubkeys': pubkeys_extra_serial,
|
|
'message': encode_hex(message),
|
|
'signature': encode_hex(aggregate_signature),
|
|
},
|
|
'output': False,
|
|
}
|
|
|
|
# Invalid signature -- tampered with signature
|
|
tampered_signature = aggregate_signature[:-4] + b'\xff\xff\xff\xff'
|
|
identifier = f'{pubkeys_serial}_{encode_hex(message)}'
|
|
assert not spec.eth_fast_aggregate_verify(pubkeys, message, tampered_signature)
|
|
yield f'eth_fast_aggregate_verify_tampered_signature_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
|
|
'input': {
|
|
'pubkeys': pubkeys_serial,
|
|
'message': encode_hex(message),
|
|
'signature': encode_hex(tampered_signature),
|
|
},
|
|
'output': False,
|
|
}
|
|
|
|
# NOTE: Unlike `FastAggregateVerify`, len(pubkeys) == 0 and signature == G2_POINT_AT_INFINITY is VALID
|
|
assert spec.eth_fast_aggregate_verify([], message, G2_POINT_AT_INFINITY)
|
|
yield 'eth_fast_aggregate_verify_na_pubkeys_and_infinity_signature', {
|
|
'input': {
|
|
'pubkeys': [],
|
|
'message': encode_hex(message),
|
|
'signature': encode_hex(G2_POINT_AT_INFINITY),
|
|
},
|
|
'output': True,
|
|
}
|
|
|
|
# Invalid pubkeys and signature -- len(pubkeys) == 0 and signature == 0x00...
|
|
assert not spec.eth_fast_aggregate_verify([], message, ZERO_SIGNATURE)
|
|
yield 'eth_fast_aggregate_verify_na_pubkeys_and_zero_signature', {
|
|
'input': {
|
|
'pubkeys': [],
|
|
'message': encode_hex(message),
|
|
'signature': encode_hex(ZERO_SIGNATURE),
|
|
},
|
|
'output': False,
|
|
}
|
|
|
|
# Invalid pubkeys and signature -- pubkeys contains point at infinity
|
|
pubkeys = PUBKEYS.copy()
|
|
pubkeys_with_infinity = pubkeys + [G1_POINT_AT_INFINITY]
|
|
signatures = [bls.Sign(privkey, SAMPLE_MESSAGE) for privkey in PRIVKEYS]
|
|
aggregate_signature = bls.Aggregate(signatures)
|
|
assert not spec.eth_fast_aggregate_verify(pubkeys_with_infinity, SAMPLE_MESSAGE, aggregate_signature)
|
|
yield 'eth_fast_aggregate_verify_infinity_pubkey', {
|
|
'input': {
|
|
'pubkeys': [encode_hex(pubkey) for pubkey in pubkeys_with_infinity],
|
|
'message': encode_hex(SAMPLE_MESSAGE),
|
|
'signature': encode_hex(aggregate_signature),
|
|
},
|
|
'output': False,
|
|
}
|
|
|
|
|
|
def create_provider(fork_name: SpecForkName,
|
|
handler_name: str,
|
|
test_case_fn: Callable[[], Iterable[Tuple[str, Dict[str, Any]]]]) -> gen_typing.TestProvider:
|
|
|
|
def prepare_fn() -> None:
|
|
# Nothing to load / change in spec. Maybe in future forks.
|
|
# Put the tests into the general config category, to not require any particular configuration.
|
|
return
|
|
|
|
def cases_fn() -> Iterable[gen_typing.TestCase]:
|
|
for data in test_case_fn():
|
|
(case_name, case_content) = data
|
|
yield gen_typing.TestCase(
|
|
fork_name=fork_name,
|
|
preset_name='general',
|
|
runner_name='bls',
|
|
handler_name=handler_name,
|
|
suite_name='small',
|
|
case_name=case_name,
|
|
case_fn=lambda: [('data', 'data', case_content)]
|
|
)
|
|
|
|
return gen_typing.TestProvider(prepare=prepare_fn, make_cases=cases_fn)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
bls.use_py_ecc() # Py-ecc is chosen instead of Milagro, since the code is better understood to be correct.
|
|
gen_runner.run_generator("bls", [
|
|
# PHASE0
|
|
create_provider(PHASE0, 'sign', case01_sign),
|
|
create_provider(PHASE0, 'verify', case02_verify),
|
|
create_provider(PHASE0, 'aggregate', case03_aggregate),
|
|
create_provider(PHASE0, 'fast_aggregate_verify', case04_fast_aggregate_verify),
|
|
create_provider(PHASE0, 'aggregate_verify', case05_aggregate_verify),
|
|
# ALTAIR
|
|
create_provider(ALTAIR, 'eth_aggregate_pubkeys', case06_eth_aggregate_pubkeys),
|
|
create_provider(ALTAIR, 'eth_fast_aggregate_verify', case07_eth_fast_aggregate_verify),
|
|
])
|