ECPy

ECPy (pronounced ekpy), is a pure python Elliptic Curve library providing ECDSA, EDDSA (Ed25519), ECSchnorr, Borromean signatures as well as Point operations.

Full html documentation is available here.

ECDSA sample

from ecpy.curves     import Curve,Point
from ecpy.keys       import ECPublicKey, ECPrivateKey
from ecpy.ecdsa      import ECDSA

cv   = Curve.get_curve('secp256k1')
pu_key = ECPublicKey(Point(0x65d5b8bf9ab1801c9f168d4815994ad35f1dcb6ae6c7a1a303966b677b813b00,
                       0xe6b865e529b8ecbf71cf966e900477d49ced5846d7662dd2dd11ccd55c0aff7f,
                       cv))
pv_key = ECPrivateKey(0xfb26a4e75eec75544c0f44e937dcf5ee6355c7176600b9688c667e5c283b43c5,
                  cv)


signer = ECDSA()
sig    = signer.sign(b'01234567890123456789012345678912',pv_key)
assert(signer.verify(b'01234567890123456789012345678912',sig,pu_key))

Point sample

from ecpy.curves     import Curve,Point

cv = Curve.get_curve('secp256k1')
P  = Point(0x65d5b8bf9ab1801c9f168d4815994ad35f1dcb6ae6c7a1a303966b677b813b00,
           0xe6b865e529b8ecbf71cf966e900477d49ced5846d7662dd2dd11ccd55c0aff7f,
           cv)
k  = 0xfb26a4e75eec75544c0f44e937dcf5ee6355c7176600b9688c667e5c283b43c5
Q  = k*P
R  = P+Q

History

1.2.4

Fix ECDSA when mesaage hash length is greater than domain order length

1.2.3

Fix ECSchnorr when r is greater than order. Main use case is when using a hash function with bitlength greater than curve size.

1.2.2

Fix ECDSA with rfc6979. Field was used instead of order for max random.

1.2.1

Missing README update

1.2.0

Fix rfc6979. Now conform to RFC and fully compat with python-ecdsa (https://github.com/warner/python-ecdsa).

1.1.0

Fix DER encoding for length greater than 128

Declare ONE infinity point per curve. Consider global (non attached to a curve) infinity point as deprecated

Fix infinity point management in ECDSA

Fix issue #13

1.0.1beta

Merge PR11, fixing an overflow with secp521k1

1.0.0beta

Initial 1.x series (Beta)

Quick Install

From Pypi

$ pip install ECPy

From Github

From tarball dist

Download last dist tarball.

Untar it

$ tar xzvf ECPy-M.m.tar.gz

install it (or use it as is…)

$ python3 setup.py install

From sources

Clone the git repository

Rebuild the tarball

$ python3 setup.py sdist

Continue with the created tarball dist.

Generate the documentation

You can regenerate the doc from git clone

$ cd doc
$ make singlehtml

Documentation is in build dir

Release files for ECPy 1.2.4

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for ECPy 1.2.4
File	Size	Uploaded
ECPy-1.2.4.tar.gz	38.5 kB	Oct 26, 2020	Details

Built distribution (wheel)

Table of built distributions (wheels) for ECPy 1.2.4
File	Interpreter	ABI	Platform	Reset
ECPy-1.2.4-py3-none-any.whl 43.1 kB Oct 26, 2020	Python 3	none	any	Details

Total release size: 81.5 kB

Release files / ECPy-1.2.4.tar.gz

Download URL	ECPy-1.2.4.tar.gz
Size	38.5 kB
Tags	Source
SHA-256 checksum How to use checksums	`63677045989f9964309a0e83ecfae4b475eebd4dfb70ab95526a8d77626c6386`
BLAKE2b-256 checksum How to use checksums	`8336dfa52250b71c9730660de1123a9bdd5e3e091a5caed6968afeafea219b39`
Upload date	Oct 26, 2020
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/3.2.0 pkginfo/1.6.0 requests/2.22.0 setuptools/45.2.0 requests-toolbelt/0.9.1 tqdm/4.51.0 CPython/3.8.5`

Release files / ECPy-1.2.4-py3-none-any.whl

Download URL	ECPy-1.2.4-py3-none-any.whl
Size	43.1 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`0d69ae9424c1875d9ab2163cdbdf91826d5bea5adce6a28b653eb97359330061`
BLAKE2b-256 checksum How to use checksums	`0e5215432c8352922723466a13dc15ffe81a0319282352410ae6e75da62836c3`
Upload date	Oct 26, 2020
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/3.2.0 pkginfo/1.6.0 requests/2.22.0 setuptools/45.2.0 requests-toolbelt/0.9.1 tqdm/4.51.0 CPython/3.8.5`