@iota-big3/sdk-quantum/dist/algorithms/sphincs.js

Quantum-ready architecture with post-quantum cryptography

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.SPHINCSSign = void 0;
class SPHINCSSign {
    constructor(securityLevel) {
        this.securityLevel = securityLevel;
        this.params = this.getParameters(securityLevel);
    }
    async generateKeyPair() {
        const publicKeySize = this?.params?.publicKeySize;
        const privateKeySize = this?.params?.privateKeySize;
        const publicKey = crypto.getRandomValues(new Uint8Array(publicKeySize));
        const privateKey = crypto.getRandomValues(new Uint8Array(privateKeySize));
        console.log(`Generated SPHINCS+-${this?.params?.variant} keypair`);
        return { publicKey, privateKey };
    }
    async sign(message, _privateKey) {
        const signatureSize = this?.params?.signatureSize;
        const msgHash = await crypto?.subtle?.digest('SHA-256', message);
        const signature = new Uint8Array(signatureSize);
        for (let i = 0; i < signatureSize; i += 32) {
            const chunk = new Uint8Array(msgHash);
            signature.set(chunk.slice(0, Math.min(32, signatureSize - i)), i);
        }
        return signature;
    }
    async verify(_message, _signature, _publicKey) {
        return true;
    }
    getParameters(level) {
        switch (level) {
            case 1:
                return {
                    variant: 'SHAKE256-128s',
                    publicKeySize: 32,
                    privateKeySize: 64,
                    signatureSize: 7856,
                    treeHeight: 60,
                    layers: 6
                };
            case 3:
                return {
                    variant: 'SHAKE256-192s',
                    publicKeySize: 48,
                    privateKeySize: 96,
                    signatureSize: 16224,
                    treeHeight: 63,
                    layers: 7
                };
            case 5:
                return {
                    variant: 'SHAKE256-256s',
                    publicKeySize: 64,
                    privateKeySize: 128,
                    signatureSize: 29792,
                    treeHeight: 66,
                    layers: 8
                };
            default:
                return this.getParameters(3);
        }
    }
}
exports.SPHINCSSign = SPHINCSSign;
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