# verifypdf

**Repository Path**: jalogs/verifypdf

## Basic Information

- **Project Name**: verifypdf
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Apache-2.0
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2026-05-13
- **Last Updated**: 2026-05-13

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# verifypdf

Node.js CLI tool to inspect whether a PDF contains a digital signature, extract certificate information, and verify:

- signature integrity (tamper detection)
- certificate chain trust and validity
- signature timestamp metadata

## Usage

```bash
verifypdf /absolute/or/relative/path/to/file.pdf
```

The command prints JSON with:

- `isSigned`: whether the PDF has signature data (`/ByteRange`)
- `hasSignerCertificate`: signature includes an embedded X.509 signer certificate
- `pfxAssessment`: explains best-effort PFX interpretation limits and result context
- `signatures[].certificateInfo`: signer certificate subject/issuer/validity
- `signatures[].signatureVerification`: integrity + trust validation
- `signatures[].timestampVerification`: signing time metadata checks
- `signatures[].tamperCheck`: whether file coverage and signature integrity indicate tampering