549 lines
21 KiB
Python
549 lines
21 KiB
Python
"""
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KZG 4844 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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from eth2spec.utils import bls
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from eth2spec.test.helpers.constants import DENEB
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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.deneb import spec
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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 field_element_bytes(x):
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return int.to_bytes(x % spec.BLS_MODULUS, 32, spec.KZG_ENDIANNESS)
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def field_element_bytes_unchecked(x):
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return int.to_bytes(x, 32, spec.KZG_ENDIANNESS)
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def encode_hex_list(a):
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return [encode_hex(x) for x in a]
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def bls_add_one(x):
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"""
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Adds "one" (actually bls.G1()) to a compressed group element.
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Useful to compute definitely incorrect proofs.
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"""
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return bls.G1_to_bytes48(
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bls.add(bls.bytes48_to_G1(x), bls.G1())
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)
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def evaluate_blob_at(blob, z):
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return field_element_bytes(
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spec.evaluate_polynomial_in_evaluation_form(spec.blob_to_polynomial(blob), spec.bytes_to_bls_field(z))
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)
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BLS_MODULUS_BYTES = spec.BLS_MODULUS.to_bytes(32, spec.KZG_ENDIANNESS)
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G1 = bls.G1_to_bytes48(bls.G1())
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G1_INVALID_TOO_FEW_BYTES = G1[:-1]
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G1_INVALID_TOO_MANY_BYTES = G1 + b"\x00"
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G1_INVALID_P1_NOT_IN_G1 = bytes.fromhex("8123456789abcdef0123456789abcdef0123456789abcdef" +
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"0123456789abcdef0123456789abcdef0123456789abcdef")
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G1_INVALID_P1_NOT_ON_CURVE = bytes.fromhex("8123456789abcdef0123456789abcdef0123456789abcdef" +
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"0123456789abcdef0123456789abcdef0123456789abcde0")
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INVALID_G1_POINTS = [G1_INVALID_TOO_FEW_BYTES, G1_INVALID_TOO_MANY_BYTES,
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G1_INVALID_P1_NOT_IN_G1, G1_INVALID_P1_NOT_ON_CURVE]
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BLOB_ALL_ZEROS = spec.Blob()
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BLOB_RANDOM_VALID1 = spec.Blob(b''.join([field_element_bytes(pow(2, n + 256, spec.BLS_MODULUS)) for n in range(4096)]))
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BLOB_RANDOM_VALID2 = spec.Blob(b''.join([field_element_bytes(pow(3, n + 256, spec.BLS_MODULUS)) for n in range(4096)]))
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BLOB_RANDOM_VALID3 = spec.Blob(b''.join([field_element_bytes(pow(5, n + 256, spec.BLS_MODULUS)) for n in range(4096)]))
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BLOB_ALL_MODULUS_MINUS_ONE = spec.Blob(b''.join([field_element_bytes(spec.BLS_MODULUS - 1) for n in range(4096)]))
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BLOB_ALMOST_ZERO = spec.Blob(b''.join([field_element_bytes(1 if n == 3211 else 0) for n in range(4096)]))
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BLOB_INVALID = spec.Blob(b'\xFF' * 4096 * 32)
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BLOB_INVALID_CLOSE = spec.Blob(b''.join(
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[BLS_MODULUS_BYTES if n == 2111 else field_element_bytes(0) for n in range(4096)]
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))
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BLOB_INVALID_LENGTH_PLUS_ONE = BLOB_RANDOM_VALID1 + b"\x00"
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BLOB_INVALID_LENGTH_MINUS_ONE = BLOB_RANDOM_VALID1[:-1]
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VALID_BLOBS = [BLOB_ALL_ZEROS, BLOB_RANDOM_VALID1, BLOB_RANDOM_VALID2,
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BLOB_RANDOM_VALID3, BLOB_ALL_MODULUS_MINUS_ONE, BLOB_ALMOST_ZERO]
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INVALID_BLOBS = [BLOB_INVALID, BLOB_INVALID_CLOSE, BLOB_INVALID_LENGTH_PLUS_ONE, BLOB_INVALID_LENGTH_MINUS_ONE]
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FE_VALID1 = field_element_bytes(0)
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FE_VALID2 = field_element_bytes(1)
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FE_VALID3 = field_element_bytes(2)
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FE_VALID4 = field_element_bytes(pow(5, 1235, spec.BLS_MODULUS))
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FE_VALID5 = field_element_bytes(spec.BLS_MODULUS - 1)
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FE_VALID6 = field_element_bytes(spec.ROOTS_OF_UNITY[1])
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VALID_FIELD_ELEMENTS = [FE_VALID1, FE_VALID2, FE_VALID3, FE_VALID4, FE_VALID5, FE_VALID6]
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FE_INVALID_EQUAL_TO_MODULUS = field_element_bytes_unchecked(spec.BLS_MODULUS)
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FE_INVALID_MODULUS_PLUS_ONE = field_element_bytes_unchecked(spec.BLS_MODULUS + 1)
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FE_INVALID_UINT256_MAX = field_element_bytes_unchecked(2**256 - 1)
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FE_INVALID_UINT256_MID = field_element_bytes_unchecked(2**256 - 2**128)
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FE_INVALID_LENGTH_PLUS_ONE = VALID_FIELD_ELEMENTS[0] + b"\x00"
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FE_INVALID_LENGTH_MINUS_ONE = VALID_FIELD_ELEMENTS[0][:-1]
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INVALID_FIELD_ELEMENTS = [FE_INVALID_EQUAL_TO_MODULUS, FE_INVALID_MODULUS_PLUS_ONE,
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FE_INVALID_UINT256_MAX, FE_INVALID_UINT256_MID,
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FE_INVALID_LENGTH_PLUS_ONE, FE_INVALID_LENGTH_MINUS_ONE]
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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 case01_blob_to_kzg_commitment():
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# Valid cases
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for blob in VALID_BLOBS:
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commitment = spec.blob_to_kzg_commitment(blob)
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identifier = f'{encode_hex(hash(blob))}'
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yield f'blob_to_kzg_commitment_case_valid_blob_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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},
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'output': encode_hex(commitment)
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}
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# Edge case: Invalid blobs
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for blob in INVALID_BLOBS:
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identifier = f'{encode_hex(hash(blob))}'
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expect_exception(spec.blob_to_kzg_commitment, blob)
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yield f'blob_to_kzg_commitment_case_invalid_blob_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob)
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},
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'output': None
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}
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def case02_compute_kzg_proof():
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# Valid cases
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for blob in VALID_BLOBS:
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for z in VALID_FIELD_ELEMENTS:
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proof, y = spec.compute_kzg_proof(blob, z)
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identifier = f'{encode_hex(hash(blob))}_{encode_hex(z)}'
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yield f'compute_kzg_proof_case_valid_blob_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'z': encode_hex(z),
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},
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'output': (encode_hex(proof), encode_hex(y))
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}
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# Edge case: Invalid blobs
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for blob in INVALID_BLOBS:
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z = VALID_FIELD_ELEMENTS[0]
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expect_exception(spec.compute_kzg_proof, blob, z)
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identifier = f'{encode_hex(hash(blob))}'
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yield f'compute_kzg_proof_case_invalid_blob_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'z': encode_hex(z),
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},
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'output': None
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}
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# Edge case: Invalid z
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for z in INVALID_FIELD_ELEMENTS:
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blob = VALID_BLOBS[4]
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expect_exception(spec.compute_kzg_proof, blob, z)
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identifier = f'{encode_hex(hash(z))}'
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yield f'compute_kzg_proof_case_invalid_z_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'z': encode_hex(z),
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},
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'output': None
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}
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def case03_verify_kzg_proof():
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# Valid cases
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for blob in VALID_BLOBS:
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for z in VALID_FIELD_ELEMENTS:
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proof, y = spec.compute_kzg_proof(blob, z)
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commitment = spec.blob_to_kzg_commitment(blob)
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assert spec.verify_kzg_proof(commitment, z, y, proof)
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identifier = f'{encode_hex(hash(blob))}_{encode_hex(z)}'
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yield f'verify_kzg_proof_case_correct_proof_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'commitment': encode_hex(commitment),
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'z': encode_hex(z),
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'y': encode_hex(y),
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'proof': encode_hex(proof),
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},
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'output': True
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}
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# Incorrect proofs
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for blob in VALID_BLOBS:
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for z in VALID_FIELD_ELEMENTS:
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proof_orig, y = spec.compute_kzg_proof(blob, z)
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proof = bls_add_one(proof_orig)
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commitment = spec.blob_to_kzg_commitment(blob)
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assert not spec.verify_kzg_proof(commitment, z, y, proof)
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identifier = f'{encode_hex(hash(blob))}_{encode_hex(z)}'
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yield f'verify_kzg_proof_case_incorrect_proof_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'commitment': encode_hex(commitment),
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'z': encode_hex(z),
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'y': encode_hex(y),
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'proof': encode_hex(proof),
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},
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'output': False
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}
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# Edge case: Invalid commitment
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for commitment in INVALID_G1_POINTS:
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blob, z = VALID_BLOBS[2], VALID_FIELD_ELEMENTS[1]
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proof, y = spec.compute_kzg_proof(blob, z)
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expect_exception(spec.verify_kzg_proof, commitment, z, y, proof)
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identifier = f'{encode_hex(commitment)}'
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yield f'verify_kzg_proof_case_invalid_commitment_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'commitment': encode_hex(commitment),
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'z': encode_hex(z),
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'y': encode_hex(y),
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'proof': encode_hex(proof),
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},
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'output': None
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}
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# Edge case: Invalid z
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for z in INVALID_FIELD_ELEMENTS:
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blob, validz = VALID_BLOBS[4], VALID_FIELD_ELEMENTS[1]
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proof, y = spec.compute_kzg_proof(blob, validz)
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commitment = spec.blob_to_kzg_commitment(blob)
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expect_exception(spec.verify_kzg_proof, commitment, z, y, proof)
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identifier = f'{encode_hex(z)}'
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yield f'verify_kzg_proof_case_invalid_z_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'commitment': encode_hex(commitment),
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'z': encode_hex(z),
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'y': encode_hex(y),
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'proof': encode_hex(proof),
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},
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'output': None
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}
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# Edge case: Invalid y
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for y in INVALID_FIELD_ELEMENTS:
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blob, z = VALID_BLOBS[4], VALID_FIELD_ELEMENTS[1]
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proof, _ = spec.compute_kzg_proof(blob, z)
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commitment = spec.blob_to_kzg_commitment(blob)
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expect_exception(spec.verify_kzg_proof, commitment, z, y, proof)
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identifier = f'{encode_hex(y)}'
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yield f'verify_kzg_proof_case_invalid_y_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'commitment': encode_hex(commitment),
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'z': encode_hex(z),
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'y': encode_hex(y),
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'proof': encode_hex(proof),
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},
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'output': None
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}
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# Edge case: Invalid proof
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for proof in INVALID_G1_POINTS:
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blob, z = VALID_BLOBS[2], VALID_FIELD_ELEMENTS[1]
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_, y = spec.compute_kzg_proof(blob, z)
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commitment = spec.blob_to_kzg_commitment(blob)
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expect_exception(spec.verify_kzg_proof, commitment, z, y, proof)
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identifier = f'{encode_hex(proof)}'
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yield f'verify_kzg_proof_case_invalid_proof_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'commitment': encode_hex(commitment),
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'z': encode_hex(z),
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'y': encode_hex(y),
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'proof': encode_hex(proof),
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},
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'output': None
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}
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def case04_compute_blob_kzg_proof():
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# Valid cases
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for blob in VALID_BLOBS:
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commitment = spec.blob_to_kzg_commitment(blob)
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proof = spec.compute_blob_kzg_proof(blob, commitment)
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identifier = f'{encode_hex(hash(blob))}'
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yield f'compute_blob_kzg_proof_case_valid_blob_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'commitment': encode_hex(commitment),
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},
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'output': encode_hex(proof)
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}
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# Edge case: Invalid blob
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for blob in INVALID_BLOBS:
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commitment = G1
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expect_exception(spec.compute_blob_kzg_proof, blob, commitment)
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identifier = f'{encode_hex(hash(blob))}'
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yield f'compute_blob_kzg_proof_case_invalid_blob_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'commitment': encode_hex(commitment),
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},
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'output': None
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}
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# Edge case: Invalid commitment
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for commitment in INVALID_G1_POINTS:
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blob = VALID_BLOBS[1]
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expect_exception(spec.compute_blob_kzg_proof, blob, commitment)
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identifier = f'{encode_hex(hash(commitment))}'
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yield f'compute_blob_kzg_proof_case_invalid_commitment_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'commitment': encode_hex(commitment),
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},
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'output': None
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}
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def case05_verify_blob_kzg_proof():
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# Valid cases
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for blob in VALID_BLOBS:
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commitment = spec.blob_to_kzg_commitment(blob)
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proof = spec.compute_blob_kzg_proof(blob, commitment)
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assert spec.verify_blob_kzg_proof(blob, commitment, proof)
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identifier = f'{encode_hex(hash(blob))}'
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yield f'verify_blob_kzg_proof_case_correct_proof_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'commitment': encode_hex(commitment),
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'proof': encode_hex(proof),
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},
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'output': True
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}
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# Incorrect proofs
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for blob in VALID_BLOBS:
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commitment = spec.blob_to_kzg_commitment(blob)
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proof = bls_add_one(spec.compute_blob_kzg_proof(blob, commitment))
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assert not spec.verify_blob_kzg_proof(blob, commitment, proof)
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identifier = f'{encode_hex(hash(blob))}'
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yield f'verify_blob_kzg_proof_case_incorrect_proof_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'commitment': encode_hex(commitment),
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'proof': encode_hex(proof),
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},
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'output': False
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}
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# Edge case: Invalid blob
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for blob in INVALID_BLOBS:
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proof = G1
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commitment = G1
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expect_exception(spec.verify_blob_kzg_proof, blob, commitment, proof)
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identifier = f'{encode_hex(hash(blob))}'
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yield f'verify_blob_kzg_proof_case_invalid_blob_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'commitment': encode_hex(commitment),
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'proof': encode_hex(proof),
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},
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'output': None
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}
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# Edge case: Invalid commitment
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for commitment in INVALID_G1_POINTS:
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blob = VALID_BLOBS[1]
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proof = G1
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expect_exception(spec.verify_blob_kzg_proof, blob, commitment, proof)
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identifier = f'{encode_hex(hash(commitment))}'
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yield f'verify_blob_kzg_proof_case_invalid_commitment_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'commitment': encode_hex(commitment),
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'proof': encode_hex(proof),
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},
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'output': None
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}
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# Edge case: Invalid proof
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for proof in INVALID_G1_POINTS:
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blob = VALID_BLOBS[1]
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commitment = G1
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expect_exception(spec.verify_blob_kzg_proof, blob, commitment, proof)
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identifier = f'{encode_hex(hash(proof))}'
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yield f'verify_blob_kzg_proof_case_invalid_proof_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blob': encode_hex(blob),
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'commitment': encode_hex(commitment),
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'proof': encode_hex(proof),
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},
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'output': None
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}
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def case06_verify_blob_kzg_proof_batch():
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# Valid cases
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proofs = []
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commitments = []
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for blob in VALID_BLOBS:
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commitments.append(spec.blob_to_kzg_commitment(blob))
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proofs.append(spec.compute_blob_kzg_proof(blob, commitments[-1]))
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for i in range(len(proofs)):
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assert spec.verify_blob_kzg_proof_batch(VALID_BLOBS[:i], commitments[:i], proofs[:i])
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identifier = f'{encode_hex(hash(b"".join(VALID_BLOBS[:i])))}'
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yield f'verify_blob_kzg_proof_batch_case_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
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'input': {
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'blobs': encode_hex_list(VALID_BLOBS[:i]),
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'commitments': encode_hex_list(commitments[:i]),
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'proofs': encode_hex_list(proofs[:i]),
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},
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'output': True
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}
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# Incorrect proof
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proofs_incorrect = [bls_add_one(proofs[0])] + proofs[1:]
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assert not spec.verify_blob_kzg_proof_batch(VALID_BLOBS, commitments, proofs_incorrect)
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yield 'verify_blob_kzg_proof_batch_case_invalid_proof', {
|
|
'input': {
|
|
'blobs': encode_hex_list(VALID_BLOBS),
|
|
'commitments': encode_hex_list(commitments),
|
|
'proofs': encode_hex_list(proofs_incorrect),
|
|
},
|
|
'output': False
|
|
}
|
|
|
|
# Edge case: Invalid blobs
|
|
for blob in INVALID_BLOBS:
|
|
blobs_invalid = VALID_BLOBS[:4] + [blob] + VALID_BLOBS[5:]
|
|
expect_exception(spec.verify_blob_kzg_proof_batch, blobs_invalid, commitments, proofs)
|
|
identifier = f'{encode_hex(hash(blob))}'
|
|
yield f'verify_blob_kzg_proof_batch_case_invalid_blob_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
|
|
'input': {
|
|
'blobs': encode_hex_list(blobs_invalid),
|
|
'commitments': encode_hex_list(commitments),
|
|
'proofs': encode_hex_list(proofs),
|
|
},
|
|
'output': None
|
|
}
|
|
|
|
# Edge case: Invalid commitment
|
|
for commitment in INVALID_G1_POINTS:
|
|
blobs = VALID_BLOBS
|
|
commitments_invalid = [commitment] + commitments[1:]
|
|
expect_exception(spec.verify_blob_kzg_proof_batch, blobs, commitments_invalid, proofs)
|
|
identifier = f'{encode_hex(hash(commitment))}'
|
|
yield f'verify_blob_kzg_proof_batch_case_invalid_commitment_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
|
|
'input': {
|
|
'blobs': encode_hex_list(blobs),
|
|
'commitments': encode_hex_list(commitments_invalid),
|
|
'proofs': encode_hex_list(proofs),
|
|
},
|
|
'output': None
|
|
}
|
|
|
|
# Edge case: Invalid proof
|
|
for proof in INVALID_G1_POINTS:
|
|
blobs = VALID_BLOBS
|
|
proofs_invalid = [proof] + proofs[1:]
|
|
expect_exception(spec.verify_blob_kzg_proof_batch, blobs, commitments, proofs_invalid)
|
|
identifier = f'{encode_hex(hash(proof))}'
|
|
yield f'verify_blob_kzg_proof_batch_case_invalid_proof_{(hash(bytes(identifier, "utf-8"))[:8]).hex()}', {
|
|
'input': {
|
|
'blobs': encode_hex_list(blobs),
|
|
'commitments': encode_hex_list(commitments),
|
|
'proofs': encode_hex_list(proofs_invalid),
|
|
},
|
|
'output': None
|
|
}
|
|
|
|
# Edge case: Blob length different
|
|
expect_exception(spec.verify_blob_kzg_proof_batch, VALID_BLOBS[:-1], commitments, proofs)
|
|
yield 'verify_blob_kzg_proof_batch_case_blob_length_different', {
|
|
'input': {
|
|
'blobs': encode_hex_list(VALID_BLOBS[:-1]),
|
|
'commitments': encode_hex_list(commitments),
|
|
'proofs': encode_hex_list(proofs),
|
|
},
|
|
'output': None
|
|
}
|
|
|
|
# Edge case: Commitment length different
|
|
expect_exception(spec.verify_blob_kzg_proof_batch, VALID_BLOBS, commitments[:-1], proofs)
|
|
yield 'verify_blob_kzg_proof_batch_case_commitment_length_different', {
|
|
'input': {
|
|
'blobs': encode_hex_list(VALID_BLOBS),
|
|
'commitments': encode_hex_list(commitments[:-1]),
|
|
'proofs': encode_hex_list(proofs),
|
|
},
|
|
'output': None
|
|
}
|
|
|
|
# Edge case: Proof length different
|
|
expect_exception(spec.verify_blob_kzg_proof_batch, VALID_BLOBS, commitments, proofs[:-1])
|
|
yield 'verify_blob_kzg_proof_batch_case_proof_length_different', {
|
|
'input': {
|
|
'blobs': encode_hex_list(VALID_BLOBS),
|
|
'commitments': encode_hex_list(commitments),
|
|
'proofs': encode_hex_list(proofs[:-1]),
|
|
},
|
|
'output': None
|
|
}
|
|
|
|
|
|
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='kzg',
|
|
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_arkworks()
|
|
gen_runner.run_generator("kzg", [
|
|
# DENEB
|
|
create_provider(DENEB, 'blob_to_kzg_commitment', case01_blob_to_kzg_commitment),
|
|
create_provider(DENEB, 'compute_kzg_proof', case02_compute_kzg_proof),
|
|
create_provider(DENEB, 'verify_kzg_proof', case03_verify_kzg_proof),
|
|
create_provider(DENEB, 'compute_blob_kzg_proof', case04_compute_blob_kzg_proof),
|
|
create_provider(DENEB, 'verify_blob_kzg_proof', case05_verify_blob_kzg_proof),
|
|
create_provider(DENEB, 'verify_blob_kzg_proof_batch', case06_verify_blob_kzg_proof_batch),
|
|
])
|