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Built-in Digital Signature for BUS

MODULE FOR 1C-BITRIX

E2E4

Built-in Digital Signature for BUS

The module enables signing PDF documents with a built-in electronic signature (QES/EQES) directly on the website. Documents signed with QES or EQES have legal force equivalent to a handwritten signature in accordance with Federal Law No. 63-FZ "On Electronic Signatures." A visual signature stamp is automatically embedded in the signed file.

Technical details

Published
26 February 2026
Updated
29 September 2026
Version
1.3.0
Installed
Fewer than 50 times
Compatible editions
First Site, Start, Standard, Small Business, Business
Responsive design
No
Composite support
No
Compatible with Sites24
No
Developer
E2E4

What this solution does

The module enables signing PDF documents with a built-in electronic signature (QES/EQES) directly on the website. Documents signed with QES or EQES have legal force equivalent to a handwritten signature in accordance with Federal Law No. 63-FZ "On Electronic Signatures." A visual signature stamp is automatically embedded in the signed file.

Use cases:

- Signing between a site visitor and administration: for example, a supplier (legal entity or individual entrepreneur) signs a supply contract during registration on a procurement platform; a counterparty signs a service completion act on a B2B service.

- Direct signing between site visitors: suitable for wholesale B2B portals and marketplaces built on BUS, where multiple suppliers and wholesale buyers (legal entities/individual entrepreneurs) are registered. Parties sign supply contracts or acceptance acts directly in their personal accounts without using external electronic document management services.

- Signing order-related documents in an online store: invoices, acts, and certificates are signed directly in the buyer's personal account.

- Signing files from infoblock properties without transferring documents to external systems.

Capabilities:

- Supported signature types: QES, EQES, NEES

The module enables the creation of embedded digital signatures in PDF documents, supporting PAdES-BES, PAdES-T, and PAdES-X Long Type 1 formats. It features a visual signature stamp with support for custom text and background images. Ready-to-use components are provided for the Bitrix administrative panel and the public site section, including a standard online store template. The public template is built with Vue.js for easy adaptation to the site's design.

Document signing is performed locally on the user's device via the CryptoPro plugin. Digital signature keys are not transmitted to the website server or third-party services.

To use the module, the signing device (administrator or visitor) must have the following installed: CryptoPro CSP version 4 or higher, the CryptoPro ECP Browser plug-in, and a valid digital signature certificate.

General iT can connect “Built-in Digital Signature for BUS”, configure it and verify the integration with the existing website.

UPDATE HISTORY

What’s new

3 releases
1.3.0 (29.09.2026)Latest update

Module security has been improved

1.2.5 (06.04.2026)

Migration to the new v2 API of the signing service

1.1.0 (23.01.2026)

Added support for creating signatures in PAdES-T and PAdES-X Long Type 1 formats

USER EXPERIENCE

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BEFORE YOU ORDER

Let’s go through the details.

What does the price cover?
The displayed price covers the solution itself. Platform licensing, installation and customisation are checked separately. If the page offers bundles, select the required option before submitting a request.
How do I check compatibility?
Compare the supported editions and solution version in the technical details with your project. Before installing on a live website, we recommend making a backup and checking the solution in a test environment.
Is there a trial?
The developer lists a trial of 14 days. The trial button opens the installer in your website control panel. Check the required features and compatibility before purchasing.
How much does this solution’s renewal cost?
The current renewal price is 19,950 ₽. Before you order, a manager will confirm the renewal period and whether it applies to your licence.
Can you help with implementation?
We can help install the module, check its settings and verify how it works in your project. Compatibility with other customisations and the scope of work are assessed before we begin.

GENERAL iT

Let’s discuss your project

Получатель: ООО «Дженерал Ай Ти Рус»

1C-BITRIX

Install solution

Enter a domain with or without https://. The installer will open in your website control panel in a new tab.

Solution screenshots

Solution screenshot