验证pdf文件的电子章签名

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yalong</groupId>
    <artifactId>verifyPdf</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <lombok.version>1.18.10</lombok.version>

    </properties>
    <dependencies>
        <!--        <dependency>-->
        <!--            <groupId> e-iceblue </groupId>-->
        <!--            <artifactId>spire.pdf</artifactId>-->
        <!--            <version>3.4.2</version>-->
        <!--        </dependency>-->
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.3.0</version>
        </dependency>
        <dependency>
            <groupId>e-iceblue</groupId>
            <artifactId>spire.pdf.free</artifactId>
            <version>2.6.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.0.1</version>
        </dependency>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>com.e-iceblue</id>
            <url>http://repo.e-iceblue.cn/repository/maven-public/</url>
        </repository>
    </repositories>
</project>

VerifySignature.java

import com.spire.pdf.PdfDocument;
import com.spire.pdf.security.PdfCertificate;
import com.spire.pdf.security.PdfSignature;
import com.spire.pdf.widget.PdfFormFieldWidgetCollection;
import com.spire.pdf.widget.PdfFormWidget;
import com.spire.pdf.widget.PdfSignatureFieldWidget;
import lombok.Data;
import lombok.ToString;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashSet;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.*;
import java.awt.*;

@Data
@ToString
class ExcelDataVO implements Serializable {
    private String fileName;
    private String signDate;
    private String validBefore;
    private String validAfter;
    private String subject;
    private String serialNumber;
    private Boolean isEffective = false;

}

class ExcelWriter {

    //表头
    private static final List<String> CELL_HEADS;

    static {
        // 类装载时就载入指定好的表头信息，如有需要，可以考虑做成动态生成的表头
        CELL_HEADS = new ArrayList<>();
        CELL_HEADS.add("文件名");
        CELL_HEADS.add("签名时间");
        CELL_HEADS.add("有效期");
        CELL_HEADS.add("有效期");
        CELL_HEADS.add("签名机构");
        CELL_HEADS.add("序列号");
        CELL_HEADS.add("是否通过验签");
    }

    /**
     * 生成Excel并写入数据信息
     *
     * @param dataList 数据列表
     * @return 写入数据后的工作簿对象
     */
    public static Workbook exportData(List<ExcelDataVO> dataList) {
        // 生成xlsx的Excel
        Workbook workbook = new SXSSFWorkbook();

        // 如需生成xls的Excel，请使用下面的工作簿对象，注意后续输出时文件后缀名也需更改为xls
        //Workbook workbook = new HSSFWorkbook();

        // 生成Sheet表，写入第一行的表头
        Sheet sheet = buildDataSheet(workbook);
        //构建每行的数据内容
        int rowNum = 1;
        for (ExcelDataVO data : dataList) {
            if (data == null) {
                continue;
            }
            //输出行数据
            Row row = sheet.createRow(rowNum++);
            convertDataToRow(workbook, data, row);
        }
        return workbook;
    }

    /**
     * 生成sheet表，并写入第一行数据（表头）
     *
     * @param workbook 工作簿对象
     * @return 已经写入表头的Sheet
     */
    private static Sheet buildDataSheet(Workbook workbook) {
        Sheet sheet = workbook.createSheet();
        // 设置表头宽度
        for (int i = 0; i < CELL_HEADS.size(); i++) {
            sheet.setColumnWidth(i, 4000);
        }
        // 设置默认行高
        sheet.setDefaultRowHeight((short) 400);
        // 构建头单元格样式
        CellStyle cellStyle = buildHeadCellStyle(sheet.getWorkbook());
        // 写入第一行各列的数据
        Row head = sheet.createRow(0);
        for (int i = 0; i < CELL_HEADS.size(); i++) {
            Cell cell = head.createCell(i);
            cell.setCellValue(CELL_HEADS.get(i));
            cell.setCellStyle(cellStyle);
        }
        return sheet;
    }

    /**
     * 设置第一行表头的样式
     *
     * @param workbook 工作簿对象
     * @return 单元格样式对象
     */
    private static CellStyle buildHeadCellStyle(Workbook workbook) {
        CellStyle style = workbook.createCellStyle();
        //对齐方式设置
        style.setAlignment(HorizontalAlignment.CENTER);
        //边框颜色和宽度设置
        style.setBorderBottom(BorderStyle.THIN);
        style.setBottomBorderColor(IndexedColors.BLACK.getIndex()); // 下边框
        style.setBorderLeft(BorderStyle.THIN);
        style.setLeftBorderColor(IndexedColors.BLACK.getIndex()); // 左边框
        style.setBorderRight(BorderStyle.THIN);
        style.setRightBorderColor(IndexedColors.BLACK.getIndex()); // 右边框
        style.setBorderTop(BorderStyle.THIN);
        style.setTopBorderColor(IndexedColors.BLACK.getIndex()); // 上边框
        //设置背景颜色
        style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        //粗体字设置
        Font font = workbook.createFont();
        font.setBold(true);
        style.setFont(font);
        return style;
    }

    /**
     * 将数据转换成行
     *
     * @param data 源数据
     * @param row  行对象
     */
    private static void convertDataToRow(Workbook workbook, ExcelDataVO data, Row row) {

        int cellNum = 0;
        Cell cell;

        //对特殊数值设置颜色
        CellStyle cellStyle = workbook.createCellStyle();

        //字体设置
        Font font = workbook.createFont();
        font.setBold(true);
        font.setColor(IndexedColors.GREEN.getIndex());
        cellStyle.setFont(font);

        // 文件名
        cell = row.createCell(cellNum++);
        cell.setCellValue(data.getFileName());

        // 签名时间
        cell = row.createCell(cellNum++);
        cell.setCellValue(null == data.getSignDate() ? "" : data.getSignDate());

        // 有效期
        cell = row.createCell(cellNum++);
        cell.setCellValue(null == data.getValidBefore() ? "" : data.getValidBefore());

        // 有效期
        cell = row.createCell(cellNum++);
        cell.setCellValue(null == data.getValidAfter() ? "" : data.getValidAfter());
        //主题
        cell = row.createCell(cellNum++);
        cell.setCellValue(null == data.getSubject() ? "" : data.getSubject());
        //序列号
        cell = row.createCell(cellNum++);
        cell.setCellValue(null == data.getSerialNumber() ? "" : data.getSerialNumber());
        //是否通过验签
        cell = row.createCell(cellNum);
        if (data.getIsEffective()) {
            cell.setCellValue("签名有效");
        } else {
            cell.setCellValue("签名无效");
            cell.setCellStyle(cellStyle);

        }
    }

    public static void writeExcel(List<ExcelDataVO> dataVOList, String exportFilePath) {

        // 写入数据到工作簿对象内
        Workbook workbook = ExcelWriter.exportData(dataVOList);

        // 以文件的形式输出工作簿对象
        FileOutputStream fileOut = null;
        try {
            File exportFile = new File(exportFilePath);
            if (!exportFile.exists()) {
                boolean newFile = exportFile.createNewFile();
                if (!newFile) {
                    System.out.println("文件创建失败");
                }
            }

            fileOut = new FileOutputStream(exportFilePath);
            workbook.write(fileOut);
            fileOut.flush();
        } catch (Exception e) {
            System.out.println("输出Excel时发生错误，错误原因：" + e.getMessage());
        } finally {
            try {
                if (null != fileOut) {
                    fileOut.close();
                }
                workbook.close();
            } catch (IOException e) {
                System.out.println("关闭输出流时发生错误，错误原因：" + e.getMessage());
            }
        }
    }
}

public class VerifySignature {
    private static String fromDirPath;
    private static String toFilePath;

    public static void main(String[] args) {
        final JFrame jf = new JFrame("测试窗口");
        jf.setSize(400, 250);
        jf.setLocationRelativeTo(null);
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();

        // 创建文本区域, 用于显示相关信息
        final JTextArea msgTextArea = new JTextArea(10, 30);
        msgTextArea.setLineWrap(true);
        panel.add(msgTextArea);

        JButton openBtn = new JButton("选择文件路径");
        openBtn.addActionListener(e -> showFileOpenDialog(jf, msgTextArea));
        panel.add(openBtn);

        JButton saveBtn = new JButton("结果保存位置");
        saveBtn.addActionListener(e -> showFileSaveDialog(jf, msgTextArea));
        panel.add(saveBtn);

        jf.setContentPane(panel);
        jf.setVisible(true);

        JButton enSureBtn = new JButton("确认");
        enSureBtn.addActionListener(e -> enSureListener(jf));
        panel.add(enSureBtn);

        jf.setContentPane(panel);
        jf.setVisible(true);
    }

    /*
     * 打开文件
     */
    private static void showFileOpenDialog(Component parent, JTextArea msgTextArea) {
        // 创建一个默认的文件选取器
        JFileChooser fileChooser = new JFileChooser();

        // 设置默认显示的文件夹为当前文件夹
        fileChooser.setCurrentDirectory(new File("."));

        // 设置文件选择的模式（只选文件、只选文件夹、文件和文件均可选）
        fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);

        // 设置是否允许多选
        fileChooser.setMultiSelectionEnabled(false);

//        // 添加可用的文件过滤器（FileNameExtensionFilter 的第一个参数是描述, 后面是需要过滤的文件扩展名 可变参数）
//        fileChooser.addChoosableFileFilter(new FileNameExtensionFilter("zip(*.zip, *.rar)", "zip", "rar"));
//
//        // 设置默认使用的文件过滤器
//        fileChooser.setFileFilter(new FileNameExtensionFilter("image(*.jpg, *.png, *.gif)", "jpg", "png", "gif"));

        // 打开文件选择框（线程将被阻塞, 直到选择框被关闭）
        int result = fileChooser.showOpenDialog(parent);

        if (result == JFileChooser.APPROVE_OPTION) {
            // 如果点击了"确定", 则获取选择的文件路径
            File file = fileChooser.getSelectedFile();
            fromDirPath = file.getAbsolutePath();

            msgTextArea.append("选择源文件: " + fromDirPath + "\n\n");
        }
    }

    /*
     * 选择文件保存路径
     */
    private static void showFileSaveDialog(Component parent, JTextArea msgTextArea) {
        // 创建一个默认的文件选取器
        JFileChooser fileChooser = new JFileChooser();

        //把时间戳经过处理得到期望格式的时间
        Date date = new Date();
        SimpleDateFormat format0 = new SimpleDateFormat("yyyyMMddHHmmss");
        String now = format0.format(date.getTime());

        // 设置打开文件选择框后默认输入的文件名
        fileChooser.setSelectedFile(new File(now + ".xlsx"));

        // 打开文件选择框（线程将被阻塞, 直到选择框被关闭）
        int result = fileChooser.showSaveDialog(parent);

        if (result == JFileChooser.APPROVE_OPTION) {
            // 如果点击了"保存", 则获取选择的保存路径
            File file = fileChooser.getSelectedFile();
            toFilePath = file.getAbsolutePath();
            msgTextArea.append("结果文件路径: " + toFilePath + "\n\n");
        }
    }

    //找到需要的内容
    public final static Pattern pattern = Pattern.compile("\\[Subject\\].*?O=(.*?),.*?\\[Issuer\\](.*?)\\[Serial Number\\](.*?)\\[Not Before\\](.*?)\\[Not After\\](.*?)\\[Thumbprint\\](.*?)");
    // 剔除特殊字符
    public final static Pattern replacePattern = Pattern.compile("\t|\r|\n");

    /**
     * 查找某个路径下的所有pdf文件
     *
     * @return 所有的pdf绝对路径
     */
    public static HashSet<String> listDir(String path) {
        HashSet<String> FileNameString = new HashSet<String>();
        File file = new File(path);        //获取其file对象
        File[] fs = file.listFiles();    //遍历path下的文件和目录，放在File数组中
        if (fs == null) {
            System.out.println(path + "路径下没有文件");
            return null;
        }

        //遍历File[]数组
        for (File f : fs) {
            String fileName = String.valueOf(f);
            if (!f.isDirectory() && fileName.toLowerCase().endsWith(".pdf"))        //若非目录(即文件)，则打印
                FileNameString.add(fileName);
        }
        return FileNameString;
    }

    /**
     * 检验pdf文件是否签名
     *
     * @param filePath pdf文件绝对路径
     */
    public static ExcelDataVO checkPdf(String filePath) {
        //创建PdfDocument实例
        PdfDocument doc = new PdfDocument();

        //创建结果集
        ExcelDataVO excelDataVO = new ExcelDataVO();

        //文件名,注意windows下应该是\\,linux下是/
        String fileName = filePath.substring(filePath.lastIndexOf("\\") + 1);
        excelDataVO.setFileName(fileName);

        //加载含有签名的PDF文件
        doc.loadFromFile(filePath);

        //获取域集合
        PdfFormWidget pdfFormWidget = (PdfFormWidget) doc.getForm();
        PdfFormFieldWidgetCollection pdfFormFieldWidgetCollection = pdfFormWidget.getFieldsWidget();
//        int countCollection = pdfFormFieldWidgetCollection.getCount();
//        System.out.println("共发现" + countCollection + "个域");

        //遍历域
        for (int i = 0; i < pdfFormFieldWidgetCollection.getCount(); i++) {
            //判定是否为签名域
            if (pdfFormFieldWidgetCollection.get(i) instanceof PdfSignatureFieldWidget) {
                //获取签名域
                PdfSignatureFieldWidget signatureFieldWidget = (PdfSignatureFieldWidget) pdfFormFieldWidgetCollection.get(i);
                //获取签名时间
                PdfSignature signature = signatureFieldWidget.getSignature();
                excelDataVO.setSignDate(String.valueOf(signature.getDate()));

                //获取签名的内容
                PdfCertificate certificate = signature.getCertificate();

                // System.out.println("Issuer:" + certificate.getIssuer());

//                System.out.println("Subject:" + certificate.getSubject());
//                System.out.println("---------");

//                excelDataVO.setSubject(String.valueOf(certificate.getSubject()));

                String certificateString = certificate.toString();

                Matcher m = replacePattern.matcher(certificateString);
                certificateString = m.replaceAll("");

                Matcher matcher = pattern.matcher(certificateString);
                while (matcher.find()) {
//                    String group = matcher.group(0);
                    String subject = matcher.group(1);
//                    String issuer = matcher.group(2);
                    String serialNumber = matcher.group(3);

                    String before = matcher.group(4);
                    String after = matcher.group(5);
//                    String sha1 = matcher.group(6);
                    excelDataVO.setSubject(subject);
                    excelDataVO.setSerialNumber(serialNumber);
                    excelDataVO.setValidBefore(before);
                    excelDataVO.setValidAfter(after);
                }

                //判定签名是否有效
                boolean result = signature.verifySignature();
                excelDataVO.setIsEffective(result);

                if (result) {
                    return excelDataVO;
                }
            }
        }
        return excelDataVO;
    }

    /*
     * 开始执行业务逻辑
     */
    private static void enSureListener(JFrame parent) {
        parent.dispose();
        System.out.println("开始验签...");

        //从某个路径下获取所有的pdf文件路径
        HashSet<String> filePaths = listDir(fromDirPath);
        if (filePaths == null) {
            return;
        }
        List<ExcelDataVO> excelDataVOS = new ArrayList<>();

        for (String filePath : filePaths) {
            ExcelDataVO excelDataVO = checkPdf(filePath);
            excelDataVOS.add(excelDataVO);
        }

        ExcelWriter.writeExcel(excelDataVOS, toFilePath);
        System.out.println("验签完成...");

    }

}