81

GitHub - tuxxy/hazmat-math: Hazmat ECC arithmetic for Cryptography.io

 6 years ago
source link: https://github.com/tuxxy/hazmat-math
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.

hazmat-math

Hazmat ECC arithmetic for Cryptography.io

Hazmat math implements some basic ECC arithmetic for use with Cryptography.io objects using the OpenSSL backend. Specifically, _EllipticCurvePrivateKey and _EllipticCurvePublicKey.

Any operations with EC_POINT will return an _EllipticCurvePublicKey and any operations with BN will return an _EllipticCurvePrivateKey.

Usage:

from cryptography.hazmat.backends import default_backend()
from cryptography.hazmat.primitives.asymmetric import ec

from hazmat_math import operations as ops


priv_a = ec.generate_private_keys(ec.SECP256K1(), default_backend())
priv_b = ec.generate_private_keys(ec.SECP256K1(), default_backend())

pub_a = priv_a.public_key()
pub_b = priv_b.public_key()

# Multiplication
priv_c = ops.BN_MOD_MUL(priv_a, priv_b)
pub_c = ops.EC_POINT_MUL(pub_a, priv_a)

# Division
priv_c = ops.BN_DIV(priv_a, priv_b)

# Inversion
inv_a_priv = ops.BN_MOD_INVERSE(priv_a)
inv_a_pub = ops.EC_POINT_INVERT(pub_a)

# Addition
priv_c = ops.BN_MOD_ADD(priv_a, priv_b)
pub_c = ops.EC_POINT_ADD(pub_a, pub_b)

# Subtraction
priv_c = ops.BN_MOD_SUB(priv_a, priv_b)
pub_c = ops.EC_POINT_SUB(pub_a, pub_b)

# Get generator point from curve
gen_point = ops.CURVE_GET_GENERATOR(ec.SECP256K1())

# Get order of curve
order = ops.CURVE_GET_ORDER(ec.SECP256K1())

Installation:

  1. Clone or download the repository
  2. Ensure that you have cryptography.io install (pip install cryptography)
  3. python setup.py install

TODO:

  1. Testing!
  2. Get setup on pypy.

report

Recommend

About Joyk


Aggregate valuable and interesting links.
Joyk means Joy of geeK