PDF 加密

复制from PyPDF2 import PdfReader, PdfWriter

reader = PdfReader("input.pdf")
writer = PdfWriter()

# 复制所有页面
for page in reader.pages:
    writer.add_page(page)

# 设置用户密码（打开密码）和所有者密码（权限密码）
writer.encrypt(
    user_password="user123",
    owner_password="owner456",
    permissions_flag=-44  # 禁止打印和修改
)

with open("protected.pdf", "wb") as f:
    writer.write(f)

print("已生成 protected.pdf，打开密码：user123")

复制package main

import (
	"fmt"
	"github.com/pdfcpu/pdfcpu/pkg/api"
	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
)

func main() {
	// 设置打开密码和权限（禁止打印、修改、复制）
	conf := pdfcpu.NewDefaultConfiguration()
	conf.UserPW = "user123"
	conf.OwnerPW = "owner456"
	conf.Permissions = &pdfcpu.Permissions{
		Print:      false,
		Modify:     false,
		Copy:       false,
		Annotations: false,
	}

	err := api.EncryptFile("input.pdf", "protected.pdf", conf)
	if err != nil {
		fmt.Println("加密失败:", err)
		return
	}
	fmt.Println("已生成 protected.pdf")
}

复制const { PDFDocument } = require('pdf-lib');
const fs = require('fs');

async function encryptPDF() {
  const pdfBytes = fs.readFileSync('input.pdf');
  const pdfDoc = await PDFDocument.load(pdfBytes);

  // 设置打开密码和所有者密码
  pdfDoc.encrypt({
    userPassword: 'user123',
    ownerPassword: 'owner456',
    permissions: {
      printing: 'lowResolution',  // 仅允许低分辨率打印
      modifying: false,
      copying: false,
      annotating: false,
      fillingForms: false,
      contentAccessibility: true,
      documentAssembly: false
    }
  });

  const encryptedBytes = await pdfDoc.save();
  fs.writeFileSync('protected.pdf', encryptedBytes);
  console.log('已生成 protected.pdf');
}

encryptPDF().catch(console.error);