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Merge pull request #1179 from ethereum/bls-test-pad-issue 

Bls G2 padding issue
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Diederik Loerakker 2019-06-14 18:23:40 +02:00 committed by GitHub
parent 7cf0dcd25d aed5db033a
commit 79e6850a84
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1 changed files with 12 additions and 6 deletions
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18
test_generators/bls/main.py
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@ -12,8 +12,15 @@ from gen_base import gen_runner, gen_suite, gen_typing
from py_ecc import bls from py_ecc import bls
def int_to_hex(n: int) -> str: F2Q_COEFF_LEN = 48
return '0x' + int_to_big_endian(n).hex() G2_COMPRESSED_Z_LEN = 48
def int_to_hex(n: int, byte_length: int=None) -> str:
byte_value = int_to_big_endian(n)
if byte_length:
byte_value = byte_value.rjust(byte_length, b'\x00')
return '0x' + byte_value.hex()
def hex_to_int(x: str) -> int: def hex_to_int(x: str) -> int:
@ -58,8 +65,8 @@ def hash_message(msg: bytes,
""" """
return [ return [
[ [
int_to_hex(fq2.coeffs[0]), int_to_hex(fq2.coeffs[0], F2Q_COEFF_LEN),
int_to_hex(fq2.coeffs[1]), int_to_hex(fq2.coeffs[1], F2Q_COEFF_LEN),
] ]
for fq2 in bls.utils.hash_to_G2(msg, domain) for fq2 in bls.utils.hash_to_G2(msg, domain)
] ]
@ -75,8 +82,7 @@ def hash_message_compressed(msg: bytes, domain: int) -> Tuple[str, str]:
- Message hash as a compressed G2 point - Message hash as a compressed G2 point
""" """
z1, z2 = bls.utils.compress_G2(bls.utils.hash_to_G2(msg, domain)) z1, z2 = bls.utils.compress_G2(bls.utils.hash_to_G2(msg, domain))
return [int_to_hex(z1), int_to_hex(z2)] return [int_to_hex(z1, G2_COMPRESSED_Z_LEN), int_to_hex(z2, G2_COMPRESSED_Z_LEN)]
@to_tuple @to_tuple