https://github.com/neocturne/libuecc

Very small Elliptic Curve Cryptography library
https://github.com/neocturne/libuecc

Last synced: 21 days ago
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Very small Elliptic Curve Cryptography library

• Host: GitHub
• URL: https://github.com/neocturne/libuecc
• Owner: neocturne
• License: other
• Created: 2019-08-21T10:32:22.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-08-21T10:37:50.000Z (over 5 years ago)
• Last Synced: 2024-11-19T07:39:57.884Z (23 days ago)
• Language: C
• Size: 92.8 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README
  • Changelog: CHANGELOG

Awesome Lists containing this project

• awesome-embedded-software - libuecc - Very small generic-purpose Elliptic Curve Cryptography library compatible with Ed25519. (Cryptography / Elliptic Curve Cryptography)

README

        
libuecc is a very small generic-purpose Elliptic Curve Cryptography library

compatible with Ed25519.

Most documentation can be found as Doxygen comments in the ecc.h header

file. You can use `make doxygen` after running CMake to create HTML

documenation from it.

There are two sets of functions converting between libuecc's internal point

representation and coordinates or compressed representation. The functions

ending with _ed25519 use the same representation as original Ed25519

implementation and should be used by new software. The functions with the

suffix _legacy are provided for compatiblity with libuecc version before

v6.

Ed25519 and the legacy representation are isomorphic, they use a Twisted

Edwards Curve

    ax^2 + y^2 = 1 + dx^2y^2

over the prime field for p = 2^255 - 19.

Ed25519 uses the parameters

    a = -1 and

    d = -(121665/121666),

while the legacy curve has

    a = 486664

    d = 486660.