libresign/pdf-signature-validator

High-quality PDF signature extraction and validation primitives for LibreSign and external consumers.

v0.2.1 2026-04-24 14:34 UTC

Requires

• php: ^8.2
• phpseclib/phpseclib: ^3.0

Requires (Dev)

• bamarni/composer-bin-plugin: ^1.8
• roave/security-advisories: dev-latest

AGPL-3.0-or-later

README

Minimal PHP library to extract and validate PDF signatures.

Install

composer require libresign/pdf-signature-validator

Usage

use LibreSign\PdfSignatureValidator\Parser\PdfSignatureValidator;

$validator = new PdfSignatureValidator();

$results = $validator->validateFromString($pdfBinaryContent);
// or: $results = $validator->validateFromResource($resource);

Each item in $results includes:

• signatureValidation (ValidationResult)
• certificateValidation (ValidationResult)

Development

Use the CI workflows as the source of truth. For local execution, use the scripts declared in composer.json.