v0.1.1 — Initial Release

Minimal PDF encrypt/decrypt library with AES-256 (PDF Rev 5).

Features
encryptPDF — Encrypt any PDF buffer with user and/or owner password
decryptPDF — Decrypt with either password
AES-256-CBC per stream and string with random IVs
Spec-compliant Rev 5 security handler (Adobe Supplement to ISO 32000)
SHA-256 key derivation with embedded salts in U/O
Crypt filters (AESV3), Perms validation block
Zero external crypto dependencies — uses Web Crypto (Node 18+)
Ships ESM + CJS + TypeScript declarations
Peer dependency: pdf-lib
Usage
import { encryptPDF, decryptPDF } from 'cryptpdf';

const encrypted = await encryptPDF(pdfBytes, 'user-pass', 'owner-pass');
const decrypted = await decryptPDF(encrypted, 'user-pass');

v0.1.0 — Initial Release

Minimal PDF encrypt/decrypt library with AES-256 (PDF Rev 5).

Features

• encryptPDF — Encrypt any PDF buffer with user and/or owner password
• decryptPDF — Decrypt with either password
• AES-256-CBC per stream and string with random IVs
• Spec-compliant Rev 5 security handler (Adobe Supplement to ISO 32000)
• SHA-256 key derivation with embedded salts in U/O
• Crypt filters (AESV3), Perms validation block
• Zero external crypto dependencies — uses Web Crypto (Node 18+)
• Ships ESM + CJS + TypeScript declarations
• Peer dependency: pdf-lib

Usage

import { encryptPDF, decryptPDF } from 'cryptpdf';

const encrypted = await encryptPDF(pdfBytes, 'user-pass', 'owner-pass');
const decrypted = await decryptPDF(encrypted, 'user-pass');