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https://github.com/davxy/cry

CRY crypto library
https://github.com/davxy/cry

arithmetic bignumber cryptography mpi number-theory

Last synced: 10 days ago
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CRY crypto library

Host: GitHub
URL: https://github.com/davxy/cry
Owner: davxy
License: mit
Created: 2023-01-01T15:36:01.000Z (about 2 years ago)
Default Branch: master
Last Pushed: 2023-09-02T13:13:01.000Z (over 1 year ago)
Last Synced: 2024-12-20T21:59:58.353Z (13 days ago)
Topics: arithmetic, bignumber, cryptography, mpi, number-theory
Language: C
Homepage:
Size: 3.73 MB
Stars: 1
Watchers: 2
Forks: 2
Open Issues: 6
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
- Authors: AUTHORS.md

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README

[![Build Status](https://gitlab.com/davxy/cry/badges/master/pipeline.svg)](https://gitlab.com/davxy/cry/-/pipelines)
[![Coverage Status](https://coveralls.io/repos/github/crylib/cry/badge.svg?branch=master)](https://coveralls.io/github/crylib/cry?branch=master)

CRY
===

CRY is a small, comprehensive and portable cryptographic library prividing
a good collection of ciphers, hash functions, pseudo-random number generators
and multi-precision integers algorithms.

### ⚠️ WARNING ⚠️

The code has never been audited by any third party nor has been developed
with the intent to be used for any serious application.

Main focus was personal research and fun.

The implementations are not constant time nor efficient.

**USE IT AT YOUR OWN RISK!!!**

Symmetric ciphers
-----------------

### Block ciphers

- AES (Rijndael)
- DES and Triple DES

### Block ciphers mode of operation

- ECB (electronic codebook)
- CBC (cipher block chaining)
- CFB (cipher feedback)
- CTR (counter)
- GCM (Galois counter mode)

### Stream ciphers

- ARC4
- Trivium

Public key algorithms
---------------------

### Ciphers

- RSA (PKCS1 v1.5 padding)

### Secret exchange

- Diffie-Hellman (DH)
- ECDH

### Digital signature

- RSA (PKCS1 v2.1 PSS padding)
- DSA
- ECDSA
- Elgamal

Elliptic Curve
--------------

- EC group arithmetic.
- NIST recommended elliptic curve domain parameters over Fp.
- Brainpool standard curve domain parameters over Fp (RFC 5639).

Pseudo random numbers generators
--------------------------------

- AES-CTR CSPRNG
- LFSR-113 fast PRNG

Message authentication code
---------------------------

- HMAC
- CMAC

Hash
----

### Secure hash

- MD5
- SHA-1
- SHA-256
- SHA-512

### CRC

- CRC16-CCITT
- CRC16-IBM
- CRC16-DNP
- CRC32-Ethernet

Classical ciphers
-----------------

### Substitution ciphers

- Hill cipher
- Polyalphabetic Affine cipher

Multiple precision integers
---------------------------

- Basic arithmentic (add,sub,mul,div,mod,abs,exp,sqr)
- Modular exponentiation
- Modular inverse (Euclidean)
- GCD and LCM
- Probabilistic prime numbers generator (Miller-Rabin)
- Random mpi generator
- Comba, Karatsuba and Toom-Cook-3 multipliers

Utilities
---------

- AES Key Wrap (RFC-3394)
- Base64 encoder/decoder
- Memxor