@tigthor/kokocrypt/dist/http/headers.util.js

Enhanced Fortress Edition - Secure, quantum-resistant, high-performance encryption package

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.buildKokoHeaders = buildKokoHeaders;
exports.verifyKokoHeaders = verifyKokoHeaders;
const crypto = __importStar(require("crypto"));
function buildKokoHeaders(clientEphemeralPublicKeyBase64, ts = Date.now(), hmacSecret) {
    const headers = {
        'x-client-epk': clientEphemeralPublicKeyBase64,
        'x-client-ts': ts,
    };
    if (hmacSecret) {
        const h = crypto
            .createHmac('sha256', hmacSecret)
            .update(`${ts}.${clientEphemeralPublicKeyBase64}`)
            .digest('base64');
        headers['x-client-sig'] = h;
    }
    return headers;
}
function verifyKokoHeaders(headers, replayGuard, hmacSecret) {
    const epk = headers['x-client-epk'];
    const tsRaw = headers['x-client-ts'];
    const sig = headers['x-client-sig'];
    const ts = Number(tsRaw);
    if (!epk || !Number.isFinite(ts))
        return false;
    if (hmacSecret) {
        const expected = crypto
            .createHmac('sha256', hmacSecret)
            .update(`${ts}.${epk}`)
            .digest('base64');
        if (expected !== sig)
            return false;
    }
    return replayGuard.check(ts, String(epk));
}
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