Elliptic curve crypto in python including secp256k1 and alt_bn128
pip install py_ecc
py_ecc
implements the IETF BLS draft standard v2 with hash-to-curve v6 as per the inter-blockchain standardization agreement. The BLS standards specify different ciphersuites which each have different functionality to accommodate various use cases. The following ciphersuites are available from this library:
G2Basic
also known asBLS_SIG_BLS12381G2_XMD:SHA-256_SSWU_RO_NUL_
G2MessageAugmentation
also known asBLS_SIG_BLS12381G2_XMD:SHA-256_SSWU_RO_AUG_
G2ProofOfPossession
also known asBLS_SIG_BLS12381G2_XMD:SHA-256_SSWU_RO_POP_
from py_ecc.bls import G2ProofOfPossession as bls_pop
private_key = 5566
public_key = bls_pop.SkToPk(private_key)
message = b'\xab' * 32 # The message to be signed
# Signing
signature = bls_pop.Sign(private_key, message)
# Verifying
assert bls_pop.Verify(public_key, message, signature)
private_keys = [3, 14, 159]
public_keys = [bls_pop.SkToPk(key) for key in private_keys]
signatures = [bls_pop.Sign(key, message) for key in private_keys]
# Aggregating
agg_sig = bls_pop.Aggregate(signatures)
# Verifying signatures over the same message.
# Note this is only safe if Proofs of Possession have been verified for each of the public keys beforehand.
# See the BLS standards for why this is the case.
assert bls_pop.FastAggregateVerify(public_keys, message, agg_sig)
messages = [b'\xaa' * 42, b'\xbb' * 32, b'\xcc' * 64]
signatures = [bls_pop.Sign(key, message) for key, message in zip(private_keys, messages)]
agg_sig = bls_pop.Aggregate(signatures)
# Verify aggregate signature with different messages
assert bls_pop.AggregateVerify(zip(public_keys, messages), agg_sig)
If you would like to hack on py_ecc, please check out the Ethereum Development Tactical Manual for information on how we do:
- Testing
- Pull Requests
- Code Style
- Documentation
Feel free to create issue under https://github.com/ethereum/py_ecc/issues
Project is licensed under the MIT license.
To release a new version:
make release bump=$$VERSION_PART_TO_BUMP$$
The version format for this repo is {major}.{minor}.{patch}
for stable, and
{major}.{minor}.{patch}-{stage}.{devnum}
for unstable (stage
can be alpha or beta).
To issue the next version in line, specify which part to bump,
like make release bump=minor
or make release bump=devnum
.
If you are in a beta version, make release bump=stage
will switch to a stable.
To issue an unstable version when the current version is stable, specify the
new version explicitly, like make release bump="--new-version 4.0.0-alpha.1 devnum"