coincurve | Cross-platform Python bindings for libsecp256k1 | Cryptography library

by ofek Python Version: 20.0.0 License: Apache-2.0

X-Ray Key Features Code Snippets(4)Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | coincurve Summary

coincurve is a Python library typically used in Security, Cryptography, Ethereum, Bitcoin applications. coincurve has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can install using 'pip install coincurve' or download it from GitHub, PyPI.

This library provides well-tested Python bindings for libsecp256k1, the heavily optimized C library used by Bitcoin Core for operations on the elliptic curve secp256k1.

Support

Quality

Security

License

Reuse

Support

coincurve has a low active ecosystem.

It has 126 star(s) with 46 fork(s). There are 11 watchers for this library.

There were 1 major release(s) in the last 12 months.

There are 11 open issues and 51 have been closed. On average issues are closed in 58 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of coincurve is 20.0.0

Quality

coincurve has 0 bugs and 16 code smells.

Security

coincurve has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

coincurve code analysis shows 0 unresolved vulnerabilities.

There are 3 security hotspots that need review.

License

coincurve is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

coincurve releases are available to install and integrate.

Deployable package is available in PyPI.

Build file is available. You can build the component from source.

coincurve saves you 542 person hours of effort in developing the same functionality from scratch.

It has 1276 lines of code, 130 functions and 18 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed coincurve and discovered the below as its top functions. This is intended to give you an instant insight into coincurve implemented functionality, and help decide if they suit your requirements.

Verify the signature of the given message .
Computes the recoveryable signature .
Find the system library
Download libsecp256k files
Combine the list of public keys .
Return the build flags for a given library type .
Deserializes a recoverable signature .
Create a FFI file .
Normalize a signed signature .
Redirect stdout to stderr .

Get all kandi verified functions for this library.

coincurve Key Features

No Key Features are available at this moment for coincurve.

coincurve Examples and Code Snippets

Why are signatures created with ecdsa Python library not valid with coincurve?

Python

Lines of Code : 12

License : Strong Copyleft (CC BY-SA 4.0)

Copy

def canonize(s_bytes):
  n = 115792089237316195423570985008687907852837564279074904382605163141518161494337
  s = int.from_bytes(s_bytes, byteorder='big')
  if s > n//2:
    s = n - s
  return s.to_bytes(32, byteorder='big')

...  
seri

How to fix error with pyinstaller after compilation in exe

Python

Lines of Code : 34

License : Strong Copyleft (CC BY-SA 4.0)

Copy

a = Analysis(['C:\\path\\to\\your\\main\\py file.py'],
             pathex=['C:\\path\\to\\search\\for\\imports'],  
             binaries=[],
             datas=[('C:\\Users\\username\\AppData\\Local\\Programs\\Python\\Python38\\Lib\\site

Diffie-Hellman encryption scheme in python

Python

Lines of Code : 19

License : Strong Copyleft (CC BY-SA 4.0)

Copy

import coincurve   
alice_priv = "29307c4354b7d9d311d2cec4878c0de56c93a921d300273c19577e9004de3c9f"

alice_pub = "02f3c25355c29f64ea8e9b4e11b583ac0a7d0d8235f156cffec2b73e5756aab206"

bob_pub = "03a1db8e8b047e1350958a55e0a853151d0e1f685fa5c

Module installs but cannot be imported

Python

Lines of Code : 4

License : Strong Copyleft (CC BY-SA 4.0)

Copy

python2

python

Community Discussions

Trending Discussions on coincurve

Why are signatures created with ecdsa Python library not valid with coincurve?

How to fix error with pyinstaller after compilation in exe

QUESTION

Why are signatures created with ecdsa Python library not valid with coincurve?

Asked 2021-Dec-25 at 14:41

I'm switching from the pure Python ecdsa library to the much faster coincurve library for signing data. I would also like to switch to coincurve for verifying the signatures (including the old signatures created by the ecdsa library).

It appears that signatures created with ecdsa are not (always?) valid in coincurve. Could someone please explain why this is not working? Also, it seems that cryptography library is able to validate both ecdsa signatures and coincurve signatures without issues, consistently.

What is even more confusing, if you run below script a few times, is that sometimes it prints point 3 and other times it does not. Why would coincurve only occasionally find the signature valid?

...

ANSWER

Answered 2021-Dec-25 at 14:41

Bitcoin and the coincurve library use canonical signatures while this is not true for the ecdsa library.

What does canonical signature mean?
In general, if (r,s) is a valid signature, then (r,s') := (r,-s mod n) is also a valid signature (n is the order of the base point).
A canonical signature uses the value s' = -s mod n = n - s instead of s, i.e. the signature (r, n-s), if s > n/2, s. e.g. here.

All signatures from the ecdsa library that were not been successfully validated by the coincurve library in your test program have an s > n/2 and thus are not canonical, whereas those that were successfully validated are canonical.

So the fix is simply to canonize the signature of the ecdsa library, e.g.:

Source https://stackoverflow.com/questions/70477905

QUESTION

How to fix error with pyinstaller after compilation in exe

Asked 2021-Oct-22 at 21:40

I compiled a Python script into an exe file, but after opening the exe, the console opens and an error occurs, then the console immediately closes. Perhaps this is due to the fact that I am using downloaded libraries (web3, bs4, hdwallet, bip_utils)

...

ANSWER

Answered 2021-Oct-22 at 21:40

It seems like you need to copy the files that your project uses in to the exe. To do this you need to add-data when running pyinstaller. You can use pyinstaller spec files to configure the settings of your compilation.

Here is a example of spec file (you need to modify it for your use):

Source https://stackoverflow.com/questions/69682748

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install coincurve

You can install using 'pip install coincurve' or download it from GitHub, PyPI.
You can use coincurve like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

Find more information at: