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@itzmeanjan
itzmeanjan / requirements.txt
Last active August 29, 2025 17:10
Using Content Addressable Identifier (CID) for Fun and Profit
blake3==1.0.5
pillow==11.3.0
@itzmeanjan
itzmeanjan / README.md
Last active September 21, 2025 05:58
Compute Logarithm and Exponentiation Tables for Fast Multiplication and Inversion over GF(2^8)
  1. Clone this gist repository.
  2. Setup python virtual environment.
# `cd` into this gist
python3 -m venv .
source bin/activate
  1. Fetch dependencies.
python -m pip install -r requirements.txt
@itzmeanjan
itzmeanjan / README.md
Created February 22, 2025 07:08
Populate Ethereum Name Service (ENS) JSON Database from List of Labels

How to ?

  1. Download ENS labels JSON database from https://github.com/adraffy/ens-labels.git (retrieved at commit d1d85346).
  2. Download this gist and unzip. Then move the downloaded labels.json file inside the unzipped project directory.
  3. Inside unzipped project directory, create a Python virtual environment.
python -m venv .
source bin/activate
  1. Download dependencies using pip.



  


  




    


          
    

      

        
        

          

              @itzmeanjan
          

          

            
                itzmeanjan
                / linux-machine-setup.sh
            
            

              Last active
              October 14, 2025 14:51
            

              
                Quickly setup AWS EC2 linux instance - ready for running tests and benchmarks
              
          

        

      

        

  

    
    


        



  


  

        

          
          #!/bin/bash
        

        

          
          

        

        

          
          # System update
        

        

          
          sudo apt-get update
        

        

          
          sudo apt-get upgrade -y
        

        

          
          sudo apt-get autoremove -y
        

        

          
          

        

        

          
          # Install system development tools
        

        

          
          sudo apt-get install build-essential -y
        

        

          
          sudo apt-get install cmake -y
        

  





    


  




    


          
    

      

        
        

          

              @itzmeanjan
          

          

            
                itzmeanjan
                / diff.patch
            
            

              Created
              October 29, 2023 13:12
            

              
                Steps to Generate Known Answer Tests for RC4OK Pseudo Random Number Generator
              
          

        

      

        

  

    
    


        



  


  

        

          
          diff --git a/demo_rc4ok.c b/demo_rc4ok.c
        

        

          
          index 72abbb1..968c191 100644
        

        

          
          --- a/demo_rc4ok.c
        

        

          
          +++ b/demo_rc4ok.c
        

        

          
          @@ -3,7 +3,7 @@
        

        

          
           #include <pthread.h>
        

        

          
           #include <stdlib.h>
        

        

          
           #include <string.h>
        

        

          
          -#include <rc4ok.h>
        

        

          
          +#include "rc4ok.h"
        

  





    


  




    


          
    

      

        
        

          

              @itzmeanjan
          

          

            
                itzmeanjan
                / git.patch
            
            

              Last active
              October 11, 2023 09:49
            

              
                Known Answer Tests for Multimixer-128: Universal Keyed Hashing, based on Integer Multiplication
              
          

        

      

        

  

    
    


        



  


  

        

          
          diff --git a/ReferenceCode/Multimixer-128.py b/ReferenceCode/Multimixer-128.py
        

        

          
          index 2f9b11e..54cb0a6 100644
        

        

          
          --- a/ReferenceCode/Multimixer-128.py
        

        

          
          +++ b/ReferenceCode/Multimixer-128.py
        

        

          
          @@ -96,9 +96,70 @@ def Int_multimix(M,K):
        

        

          
           #256 = block size of Multimixer-128
        

        

          
           
        

        

          
           
        

        

          
          -l = int(input("Enter message Length:   "))            
        

        

          
          +def gen_rand_bytes(l: int) -> bytes:
        

  





    


  




    


          
    

      

        
        

          

              @itzmeanjan
          

          

            
                itzmeanjan
                / saber_kem_kat.patch
            
            

              Last active
              October 20, 2023 16:31
            

              
                Git Patch for Generating Known Answer Tests ( KATs ) from Saber Reference Implementation 
              
          

        

      

        

  

    
    


        



  


  

        

          
          diff --git a/Reference_Implementation_KEM/Makefile b/Reference_Implementation_KEM/Makefile
        

        

          
          index 7608e07..adfda63 100644
        

        

          
          --- a/Reference_Implementation_KEM/Makefile
        

        

          
          +++ b/Reference_Implementation_KEM/Makefile
        

        

          
          @@ -14,13 +14,13 @@ SOURCES = pack_unpack.c poly.c fips202.c verify.c cbd.c SABER_indcpa.c kem.c
        

        

          
           HEADERS = SABER_params.h pack_unpack.h poly.h rng.h fips202.h verify.h cbd.h SABER_indcpa.h 
        

        

          
           
        

        

          
           test/test_kex: $(SOURCES) $(HEADERS) rng.o test/test_kex.c
        

        

          
          -	$(CC) $(CFLAGS) -o $@ $(SOURCES) rng.o test/test_kex.c -lcrypto
        

        

          
          +	$(CC) $(CFLAGS) -o $@ -DSABER_L=$(SABER_L) $(SOURCES) rng.o test/test_kex.c -lcrypto
        

  





    


  




    


          
    

      

        
        

          

              @itzmeanjan
          

          

            
                itzmeanjan
                / google-benchmark-with-libpfm.md
            
            

              Last active
              October 13, 2025 11:33
            

              
                Using Performance Monitoring Unit(s), when benchmarking with google-benchmark.
              
          

        

      

        

  

      

    
Background


I'm demonstrating following on a machine, running Ubuntu 22.04 with GNU/Linux kernel 5.19.0.


$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.2 LTS
Release:	22.04



  


  




    


          
    

      

        
        

          

              @itzmeanjan
          

          

            
                itzmeanjan
                / gen_fips202_kat.py
            
            

              Created
              July 6, 2023 15:32
            

              
                Script for generating KATs for SHA3 Hash functions and Extendable output functions, defined in FIPS 202 Standard
              
          

        

      

        

  

    
    


        



  


  

        

          
          #!/usr/bin/python
        

        

          
          

        

        

          
          import random
        

        

          
          import hashlib
        

        

          
          

        

        

          
          MIN_MSG_LEN = 0  # minimum input message byte length
        

        

          
          MAX_MSG_LEN = 1024  # maximum input message byte length
        

        

          
          SQUEEZED_LEN = 256  # number of bytes squeezed from Xof
        

  





    


  




    


          
    

      

        
        

          

              @itzmeanjan
          

          

            
                itzmeanjan
                / frodokem_kat.patch
            
            

              Last active
              September 12, 2023 18:47
            

              
                Git Patch for generating Known Answer Tests ( KATs ) from FrodoKEM Reference Implementation 
              
          

        

      

        

  

    
    


        



  


  

        

          
          diff --git a/FrodoKEM/python3/frodokem.py b/FrodoKEM/python3/frodokem.py
        

        

          
          index 731cb0e..c701108 100644
        

        

          
          --- a/FrodoKEM/python3/frodokem.py
        

        

          
          +++ b/FrodoKEM/python3/frodokem.py
        

        

          
          @@ -4,6 +4,7 @@
        

        

          
           
        

        

          
           import bitstring
        

        

          
           import math
        

        

          
          +import sys
        

        

          
           import secrets