nav-connect/build/crypto.js

Nav Online Invoice connection module

import * as crypto from "node:crypto";
import { Buffer } from "node:buffer";
export function getRequestId() {
    const ts = Date.now().toString(36);
    const rnd = crypto.randomBytes(8).toString("hex");
    return (ts + rnd).slice(0, 30);
}
export function getTimestamp() {
    return new Date().toISOString();
}
export function sha512(msg) {
    return crypto.createHash("sha512").update(msg).digest("hex").toUpperCase();
}
export function sha3_512(msg) {
    return crypto.createHash("sha3-512").update(msg).digest("hex").toUpperCase();
}
export function formatNavTimestampForHash(isoTs) {
    const d = new Date(isoTs);
    const pad = (n) => n.toString().padStart(2, "0");
    return (d.getUTCFullYear().toString() +
        pad(d.getUTCMonth() + 1) +
        pad(d.getUTCDate()) +
        pad(d.getUTCHours()) +
        pad(d.getUTCMinutes()) +
        pad(d.getUTCSeconds()));
}
export function generateRequestMetadata() {
    const requestId = getRequestId();
    const timestamp = getTimestamp();
    const navTimestampForHash = formatNavTimestampForHash(timestamp);
    return { requestId, timestamp, navTimestampForHash };
}
export function computeManageRequestSignature(requestId, navTimestampForHash, signatureKey, operations) {
    const partialHash = requestId + navTimestampForHash + signatureKey;
    const indexHashes = operations.map((op) => sha3_512(op.operation + op.data));
    return sha3_512(partialHash + indexHashes.join(""));
}
export function decodeExchangeToken(encodedToken, exchangeKey) {
    const keyBuffer = Buffer.from(exchangeKey, "utf8").slice(0, 16);
    const tokenBuffer = Buffer.from(encodedToken, "base64");
    const decipher = crypto.createDecipheriv("aes-128-ecb", keyBuffer, null);
    const decoded = Buffer.concat([decipher.update(tokenBuffer), decipher.final()]);
    return decoded.toString("utf8").replace(/\0/g, "").trim();
}
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