Usage_Examples - galihru/pqcrypto GitHub Wiki
Below are minimal “hello, world”-style snippets for each language wrapper.
import math
from pqcrypto import keygen, encrypt, decrypt
# 1. Setup parameters
p = 10007
a = 5
P0 = (1, 0)
# 2. Generate keypair
private_k, public_Q = keygen(p, a, P0)
print("Private k:", private_k)
print("Public Q:", public_Q)
# 3. Encrypt integer m
message = 2024
C1, C2, r = encrypt(message, public_Q, private_k, p, a, P0)
print("C1:", C1, " C2:", C2, " r:", r)
# 4. Decrypt using private_k
recovered = decrypt(C1, C2, private_k, r, a, p)
print("Recovered:", recovered)
assert recovered == messageTo encrypt an entire text/file, convert it to integer blocks via int.from_bytes(...), then call encrypt(...) on each block.
// Install: npm install pqlaicrypto
const { keygen, encrypt, decrypt } = require("pqlaicrypto");
const p = 10007n;
const a = 5n;
const P0 = [1n, 0n];
// 1. Generate keypair
const { k, Q } = keygen(p, a, P0);
console.log("Private k:", k.toString());
console.log("Public Q:", Q);
// 2. Encrypt a small integer
const m = 2024n;
const { C1, C2, r } = encrypt(m, Q, k, p, a, P0);
console.log("C1:", C1, "C2:", C2, "r:", r.toString());
// 3. Decrypt
const recovered = decrypt(C1, C2, k, r, a, p);
console.log("Recovered:", recovered.toString());Use BigInt-aware file/block conversions to encrypt larger messages or files.
# Install: gem install laicrypto
require "laicrypto"
p = 10007
a = 5
P0 = [1, 0]
# 1. Generate keypair
k, Q = LAI.keygen(p, a, P0)
puts "Private k: #{k}"
puts "Public Q: #{Q.inspect}"
# 2. Encrypt integer
message = 2024
C1, C2, r = LAI.encrypt(message, Q, k, p, a, P0)
puts "C1: #{C1.inspect} C2: #{C2.inspect} r: #{r}"
# 3. Decrypt
recovered = LAI.decrypt(C1, C2, k, r, a, p)
puts "Recovered: #{recovered}"To encrypt larger text: convert via String#bytes into integers and pass each to encrypt(...).
// Install via NuGet:
// <PackageReference Include="PQCrypto.Lai" Version="0.1.0" />
using System;
using System.Numerics;
using PQCrypto; // namespace containing LaiCrypto
class Demo {
static void Main(string[] args) {
// 1. Setup parameters
BigInteger p = 10007;
BigInteger a = 5;
LaiCrypto.Point P0 = new LaiCrypto.Point(1, 0);
// 2. Generate keypair
var kp = LaiCrypto.KeyGen(p, a, P0);
Console.WriteLine($"Private k: {kp.k}");
Console.WriteLine($"Public Q: ({kp.Q.x}, {kp.Q.y})");
// 3. Encrypt integer
BigInteger message = 2024;
var ct = LaiCrypto.Encrypt(message, kp.Q, p, a, P0);
Console.WriteLine($"C1: ({ct.C1.x}, {ct.C1.y}) C2: ({ct.C2.x}, {ct.C2.y}) r: {ct.r}");
// 4. Decrypt
BigInteger recovered = LaiCrypto.Decrypt(ct.C1, ct.C2, kp.k, ct.r, a, p);
Console.WriteLine($"Recovered: {recovered}");
if (recovered != message) throw new Exception("Decryption mismatch!");
}
}To decrypt a JSON payload in C#:
using System.IO;
using Newtonsoft.Json.Linq; // or System.Text.Json
var json = File.ReadAllText("ciphertext.json");
var jNode = JObject.Parse(json);
byte[] plaintextBytes = LaiCrypto.DecryptAll(jNode);
string plaintext = System.Text.Encoding.UTF8.GetString(plaintextBytes);<!-- In your pom.xml -->
<dependency>
<groupId>com.pelajaran.pqcrypto</groupId>
<artifactId>laicrypto</artifactId>
<version>0.1.0</version>
</dependency>import com.pelajaran.pqcrypto.LaiCrypto;
import com.pelajaran.pqcrypto.LaiCrypto.Point;
import com.pelajaran.pqcrypto.LaiCrypto.KeyPair;
import com.pelajaran.pqcrypto.LaiCrypto.Ciphertext;
import java.math.BigInteger;
public class LAIDemo {
public static void main(String[] args) throws Exception {
// 1. Setup
BigInteger p = BigInteger.valueOf(10007);
BigInteger a = BigInteger.valueOf(5);
Point P0 = new Point(BigInteger.ONE, BigInteger.ZERO);
// 2. Generate key pair
KeyPair kp = LaiCrypto.keyGen(p, a, P0);
System.out.println("Private k: " + kp.k);
System.out.println("Public Q: (" + kp.Q.x + ", " + kp.Q.y + ")");
// 3. Encrypt integer
BigInteger message = BigInteger.valueOf(2024);
Ciphertext ct = LaiCrypto.encrypt(message, kp.Q, p, a, P0);
System.out.println("C1: (" + ct.C1.x + ", " + ct.C1.y + ")");
System.out.println("C2: (" + ct.C2.x + ", " + ct.C2.y + ")");
System.out.println("r: " + ct.r);
// 4. Decrypt
BigInteger recovered = LaiCrypto.decrypt(ct.C1, ct.C2, kp.k, ct.r, a, p);
System.out.println("Recovered: " + recovered);
}
}To decrypt a JSON payload in Java:
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.JsonNode;
// ...
ObjectMapper mapper = new ObjectMapper();
JsonNode root = mapper.readTree(new File("ciphertext.json"));
byte[] plaintextBytes = LaiCrypto.decryptAll(root);
String plaintext = new String(plaintextBytes, StandardCharsets.UTF_8);