initial commit

lib/BankLetter.js

@@ -0,0 +1,66 @@
+'use strict';
+
+const fs = require('fs');
+
+const moment     = require('moment');
+const handlebars = require('handlebars');
+const BN         = require("bn.js");
+
+module.exports = class BankLetter {
+	constructor(client, bankName) {
+		this.client         = client;
+		this.bankName       = bankName;
+		this.pathToTemplate = './app/ebics/ini.hbs';
+	};
+
+	_registerHelpers() {
+		handlebars.registerHelper("today", () => {
+			return moment().format('DD.MM.YYYY');
+		});
+
+		handlebars.registerHelper("now", () => {
+			return moment().format('HH:mm:ss');
+		});
+
+		handlebars.registerHelper("keyExponentBits", (k) => {
+			return Buffer.byteLength(new BN(k.key.keyPair.e).toBuffer()) * 8;
+		});
+
+		handlebars.registerHelper("keyModulusBits", (k) => {
+			return k.key.getKeySize();
+			// return Buffer.byteLength(new BN(k.key.keyPair.e).toBuffer()) * 8;
+		});
+
+		handlebars.registerHelper("keyExponent", (k) => {
+			return k.e();
+		});
+
+		handlebars.registerHelper("keyModulus", (k) => {
+			return k.n().toUpperCase().match(/.{1,2}/g).join(' ');
+		});
+
+		handlebars.registerHelper("sha256", (k) => {
+			const digest = Buffer(k.publicDigest(), 'base64').toString('HEX');
+
+			return digest.toUpperCase().match(/.{1,2}/g).join(' ');
+		});
+	};
+
+	generate() {
+		this._registerHelpers();
+
+		const str   = fs.readFileSync(this.pathToTemplate).toString();
+		const templ = handlebars.compile(str);
+
+		const data = {
+			bankName : this.bankName,
+			userId   : this.client.userId,
+			partnerId: this.client.partnerId,
+			A006     : this.client.a(),
+			X002     : this.client.x(),
+			E002     : this.client.e(),
+		};
+
+		return templ(data);
+	}
+}