pdf文件签名的问题解决

1 pdf转图片乱码问题
pdf是正常的，但是由pdf转成的图片，只要是中文，却是一堆框框，像这个问题，应该就是centos缺少字符集导致的

执行命令fc-list :lang=zh,可以看到正常的如下：

而有问题的机器，则显示没有安装

依据上面的推论，执行

# 文泉驿微米黑字体
yum install -y wqy-microhei-fonts

执行完成后可以看到

那么其他的字符集，仿照写一些命令,执行的结果就跟之前的一木一样了。这样问题就解决了。

yum install -y fontconfig mkfontscale
yum install -y wqy-microhei-fonts
yum install -y wqy-zenhei-fonts
yum install -y cjkuni-uming-fonts

还有种办法，就是将windows中的字体都复制过来，将这个文件复制到自己定义的目录

有的环境，需要重新机器才能生效。

mkdir -p /usr/share/fonts/win/Fonts
chmod -R 755 /usr/share/fonts/win/Fonts
yum install ttmkfdir -y
ttmkfdir -e /usr/share/X11/fonts/encodings/encodings.dir
# 把你的目录配置进去
vim /etc/fonts/fonts.conf
# 刷新字体缓存
fc-cache

2 今天解决冲突的jar，结果出现下面的问题

java.lang.IllegalAccessError: tried to access method org.bouncycastle.asn1.DERNull.<init>()V from class com.itextpdf.text.pdf.security.PdfPKCS7
        at com.itextpdf.text.pdf.security.PdfPKCS7.getEncodedPKCS7(PdfPKCS7.java:836)
        at com.itextpdf.text.pdf.security.MakeSignature.signDetached(MakeSignature.java:154)
        at com.whty.einv.sks.model.util.SignatureUtil.sign(SignatureUtil.java:97)
        at com.whty.einv.sks.model.util.SignatureUtil.sign(SignatureUtil.java:157)
        at com.whty.einv.sks.model.util.SignatureUtil.sign(SignatureUtil.java:143)
        at com.whty.einv.sks.model.service.impl.LocalSignatureStrategy.sign(LocalSignatureStrategy.java:38)
        at com.whty.einv.sks.model.service.AbstractInvoicePdfService.genPdf(AbstractInvoicePdfService.java:135)
        at com.whty.einv.sks.model.service.AbstractInvoicePdfService.genPdf(AbstractInvoicePdfService.java:99)
        at com.whty.einv.sks.model.service.AbstractInvoicePdfService.asyncGenPdf(AbstractInvoicePdfService.java:77)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
        at org.springframework.aop.interceptor.AsyncExecutionInterceptor.lambda$invoke$0(AsyncExecutionInterceptor.java:115)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Thr

按照kotlin 使用Itext5签署PDF在Quarkus中出现错误“PdfPKCS7无法访问void org.bouncycastle.asn1.DERNull.< init>()”
设置并不能解决问题。

 <dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk15on</artifactId>
            <version>1.70</version>
        </dependency>

按照PDF文件的数字签名编写，再本地可以运行，但是发布到容器环境中，提示下面的错误,主要原还是因为bcprov-jdk15on，因为jar冲突被排除了。

java.lang.NoClassDefFoundError: org/bouncycastle/jcajce/provider/digest/MD2$Digest
        at com.whty.einv.sks.model.util.SignUtil.sign(SignUtil.java:111)
        at com.whty.einv.sks.model.util.SignUtil.sign(SignUtil.java:83)
        at com.whty.einv.sks.model.util.SignUtil.sign(SignUtil.java:69)
        at com.whty.einv.sks.model.service.impl.LocalSignatureStrategy.sign(LocalSignatureStrategy.java:38)
        at com.whty.einv.sks.model.service.AbstractInvoicePdfService.genPdf(AbstractInvoicePdfService.java:135)
        at com.whty.einv.sks.model.service.AbstractInvoicePdfService.genPdf(AbstractInvoicePdfService.java:99)
        at com.whty.einv.sks.model.service.AbstractInvoicePdfService.asyncGenPdf(AbstractInvoicePdfService.java:77)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
        at org.springframework.aop.interceptor.AsyncExecutionInterceptor.lambda$invoke$0(AsyncExecutionInterceptor.java:115)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: org.bouncycastle.jcajce.provider.digest.MD2$Digest
        at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:135)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        ... 19 common frames omitted

现在对比一下新模式,这里的reason是必填，否则会报错，与旧模式有区别

package com.whty.einv.sks.model.util;

import com.itextpdf.io.image.ImageData;
import com.itextpdf.io.image.ImageDataFactory;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.StampingProperties;
import com.itextpdf.signatures.*;
import com.itextpdf.signatures.PdfSignatureAppearance.RenderingMode;
import com.whty.framework.base.util.CheckEmptyUtil;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.cert.Certificate;

/**
 * @author dj
 * @create 2023-09-05 19:00
 */
public class SignUtil {

    public static void sign(String src, String dest, String img, KeyStore keyStore, String password, String digestAlgorithm,
                            PdfSigner.CryptoStandard sigtype, String reason, String location) throws GeneralSecurityException, IOException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), img, chain, PrivateKey, digestAlgorithm, sigtype, reason, location);
    }

    public static void sign(String src, String dest, String img, KeyStore keyStore, String password, String digestAlgorithm,
                            PdfSigner.CryptoStandard sigtype) throws GeneralSecurityException, IOException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), img, chain, PrivateKey, digestAlgorithm, sigtype, null, null);
    }

    public static void sign(String src, String dest, KeyStore keyStore, String password, String digestAlgorithm,
                            PdfSigner.CryptoStandard sigtype, String reason, String location) throws GeneralSecurityException, IOException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), null, chain, PrivateKey, digestAlgorithm, sigtype, reason, location);
    }

    public static void sign(String src, String dest, KeyStore keyStore, String password, String digestAlgorithm,
                            PdfSigner.CryptoStandard sigtype) throws GeneralSecurityException, IOException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), null, chain, PrivateKey, digestAlgorithm, sigtype, null, null);
    }

    public static void sign(String src, String dest, String img, KeyStore keyStore, String password,String reason, String location) throws GeneralSecurityException, IOException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), img, chain, PrivateKey, DigestAlgorithms.SHA1, PdfSigner.CryptoStandard.CMS, reason, location);
    }

    public static void sign(String src, OutputStream outputStream, KeyStore keyStore, String password) throws GeneralSecurityException, IOException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, outputStream, null, chain, PrivateKey, DigestAlgorithms.SHA1, PdfSigner.CryptoStandard.CMS, "岁月云", "");
    }

    public static void sign(String src, OutputStream outputStream, String img, KeyStore keyStore, String password) throws GeneralSecurityException, IOException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, outputStream, img, chain, PrivateKey, DigestAlgorithms.SHA1, PdfSigner.CryptoStandard.CMS, null, null);
    }

    public static void sign(String src, OutputStream outputStream, String img, Certificate[] chain, PrivateKey pk, String digestAlgorithm,
                            PdfSigner.CryptoStandard sigtype, String reason, String location) throws GeneralSecurityException, IOException {

        PdfReader pdfReader = new PdfReader(src);
        sign(pdfReader,outputStream,img,chain,pk,digestAlgorithm,sigtype,reason,location);
    }


    public static void sign(PdfReader pdfReader, OutputStream outputStream, String img, Certificate[] chain, PrivateKey pk, String digestAlgorithm,
                            PdfSigner.CryptoStandard sigtype, String reason, String location) throws GeneralSecurityException, IOException {
        PdfSigner signer = new PdfSigner(pdfReader,outputStream,new StampingProperties());
        // 获取数字签章属性对象，设定数字签章的属性
        PdfSignatureAppearance appearance = signer.getSignatureAppearance();
        appearance.setReason(reason);
        appearance.setLocation(location);
        /**
         * 1 三个参数依次为：设置签名的位置、页码、签名域名称，多次追加签名的时候，签名域名称不能一样
         *  1.1 签名的位置四个参数：印章左下角的X、Y轴坐标，印章右上角的X、Y轴坐标,
         * 		这个位置是相对于PDF页面的位置坐标，即该坐标距PDF当前页左下角的坐标
         */
        Rectangle rect = new Rectangle(460, 0, 590, 90);
        appearance.setReuseAppearance(false).setPageRect(rect).setPageNumber(1);
        if(CheckEmptyUtil.isEmpty(img)) {
            img = SignUtil.class.getClassLoader().getResource("seal/empty.png").getPath();
        }
        ImageData imageData = ImageDataFactory.create(img);
        appearance.setSignatureGraphic(imageData);
        appearance.setRenderingMode(RenderingMode.GRAPHIC);
        /**
         * 算法主要为：RSA、DSA、ECDSA
         * 摘要算法,这里的itext提供了2个用于签名的接口，可以自己实现
         */
        IExternalDigest digest = new BouncyCastleDigest();
        /**
         * 签名算法，参数依次为：证书秘钥、摘要算法名称，例如MD5 | SHA-1 | SHA-2.... 以及 提供者
         */
        IExternalSignature   signature = new PrivateKeySignature(pk, digestAlgorithm, null);
        signer.signDetached(digest, signature, chain, null, null, null, 0, sigtype);

    }
}

旧模式，用法差不多，但是jar包的使用差异很大文章来源地址https://www.toymoban.com/news/detail-703506.html

package com.whty.einv.invoice.util;

import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfSignatureAppearance;
import com.itextpdf.text.pdf.PdfStamper;
import com.itextpdf.text.pdf.security.*;
import com.whty.framework.base.util.CheckEmptyUtil;
import org.apache.commons.io.FileUtils;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.cert.Certificate;


/**
 * 签名工具类
 */
public class SignatureUtil {


    /**
     * 签名
     * @param pdfReader 需要签章的pdf
     * @param dest 签完章的pdf文件路径
     * @param chain 证书链
     * @param img 印章图片
     * @param pk 签名私钥
     * @param digestAlgorithm 摘要算法名称，例如SHA-1
     * @param sigtype 数字签名格式，itext有2种
     * @param reason 签名的原因，显示在pdf签名属性中
     * @param location 签名的地点，显示在pdf签名属性中
     * @throws GeneralSecurityException
     * @throws IOException
     * @throws DocumentException
     */
    public static void sign(PdfReader pdfReader, OutputStream outputStream, String img, Certificate[] chain, PrivateKey pk, String digestAlgorithm,
                            MakeSignature.CryptoStandard sigtype, String reason, String location,InputStream sealInputStream,int[] imageLocation) throws GeneralSecurityException, IOException, DocumentException {

        /**
         * 1 参数依次为：文件名、文件输入流、文件版本号、临时文件、是否可以追加签名
         *  1.1 false的话，pdf文件只允许被签名一次，多次签名，最后一次有效
         *  1.2 true的话，pdf可以被追加签名，验签工具可以识别出每次签名之后文档是否被修改
         */
        // Create a PDF stamper
        PdfStamper stamper = PdfStamper.createSignature(pdfReader, outputStream, '\0', null, false);
        if(imageLocation == null){
            imageLocation = new int[]{460, 0, 130, 90};
        }
        if(sealInputStream != null){
            // Load the image
            BufferedImage image = ImageIO.read(sealInputStream);
            // Create a PDF image
            Image pdfImage = Image.getInstance(image, null);
            // Get the content of the first page
            PdfContentByte content = stamper.getOverContent(1);
            // Add the image to the specified location and with the specified dimensions
            pdfImage.setAbsolutePosition(imageLocation[0], imageLocation[1]);
            pdfImage.scaleAbsolute(imageLocation[2], imageLocation[3]);
            content.addImage(pdfImage);
        }


        // 获取数字签章属性对象，设定数字签章的属性
        PdfSignatureAppearance appearance = stamper.getSignatureAppearance();
        appearance.setReason(reason);
        appearance.setLocation(location);
        /**
         * 1 三个参数依次为：设置签名的位置、页码、签名域名称，多次追加签名的时候，签名域名称不能一样
         *  1.1 签名的位置四个参数：印章左下角的X、Y轴坐标，印章右上角的X、Y轴坐标,
         * 		这个位置是相对于PDF页面的位置坐标，即该坐标距PDF当前页左下角的坐标
         */
        appearance.setVisibleSignature(new Rectangle(imageLocation[0], imageLocation[1], imageLocation[0]+imageLocation[2], imageLocation[1]+imageLocation[3]), 1, "sign");

        /**
         * 用于盖章的印章图片，引包的时候要引入itext包的image
         */
        if(CheckEmptyUtil.isEmpty(img)) {
            img = SignatureUtil.class.getClassLoader().getResource("seal/empty.png").getPath();
        }
        appearance.setSignatureGraphic(Image.getInstance(img));

        /**
         * 设置认证等级，共4种，分别为：
         *  NOT_CERTIFIED、CERTIFIED_NO_CHANGES_ALLOWED、
         *  CERTIFIED_FORM_FILLING 和 CERTIFIED_FORM_FILLING_AND_ANNOTATIONS
         *
         * 需要用哪一种根据业务流程自行选择
         */
        appearance.setCertificationLevel(PdfSignatureAppearance.NOT_CERTIFIED);

        /**
         * 印章的渲染方式，同样有4种：
         *  DESCRIPTION、NAME_AND_DESCRIPTION,
         *  GRAPHIC_AND_DESCRIPTION,GRAPHIC;
         * 这里选择只显示印章
         */
        appearance.setRenderingMode(PdfSignatureAppearance.RenderingMode.GRAPHIC);

        /**
         * 算法主要为：RSA、DSA、ECDSA
         * 摘要算法,这里的itext提供了2个用于签名的接口，可以自己实现
         */
        ExternalDigest digest = new BouncyCastleDigest();
        /**
         * 签名算法，参数依次为：证书秘钥、摘要算法名称，例如MD5 | SHA-1 | SHA-2.... 以及 提供者
         */
        ExternalSignature signature = new PrivateKeySignature(pk, digestAlgorithm, null);
        /**
         * 最重要的来了,调用itext签名方法完成pdf签章
         */
        MakeSignature.signDetached(appearance, digest, signature, chain, null, null, null, 0, sigtype);
    }

    public static void sign(String src, String dest, String img, KeyStore keyStore, String password, String digestAlgorithm,
                            MakeSignature.CryptoStandard sigtype, String reason, String location) throws GeneralSecurityException, IOException, DocumentException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), img, chain, PrivateKey, digestAlgorithm, sigtype, reason, location);
    }

    public static void sign(String src, String dest, String img, KeyStore keyStore, String password, String digestAlgorithm,
                            MakeSignature.CryptoStandard sigtype) throws GeneralSecurityException, IOException, DocumentException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), img, chain, PrivateKey, digestAlgorithm, sigtype, null, null);
    }

    public static void sign(String src, String dest, KeyStore keyStore, String password, String digestAlgorithm,
                            MakeSignature.CryptoStandard sigtype, String reason, String location) throws GeneralSecurityException, IOException, DocumentException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), null, chain, PrivateKey, digestAlgorithm, sigtype, reason, location);
    }

    public static void sign(String src, String dest, KeyStore keyStore, String password, String digestAlgorithm,
                            MakeSignature.CryptoStandard sigtype) throws GeneralSecurityException, IOException, DocumentException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), null, chain, PrivateKey, digestAlgorithm, sigtype, null, null);
    }

    public static void sign(String src, String dest, KeyStore keyStore, String password) throws GeneralSecurityException, IOException, DocumentException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, new FileOutputStream(dest), null, chain, PrivateKey, DigestAlgorithms.SHA1, MakeSignature.CryptoStandard.CMS, null, null);
    }

    public static void sign(String src, OutputStream outputStream, KeyStore keyStore, String password) throws GeneralSecurityException, IOException, DocumentException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, outputStream, null, chain, PrivateKey, DigestAlgorithms.SHA1, MakeSignature.CryptoStandard.CMS, null, null);
    }

    public static void sign(String src, OutputStream outputStream, String img, KeyStore keyStore, String password) throws GeneralSecurityException, IOException, DocumentException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey PrivateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        sign(src, outputStream, img, chain, PrivateKey, DigestAlgorithms.SHA1, MakeSignature.CryptoStandard.CMS, null, null);
    }

    public static void sign(String src, OutputStream outputStream, String img, Certificate[] chain, PrivateKey pk, String digestAlgorithm,
                            MakeSignature.CryptoStandard sigtype, String reason, String location) throws GeneralSecurityException, IOException, DocumentException {

        PdfReader pdfReader = new PdfReader(src);
        sign(pdfReader,outputStream,img,chain,pk,digestAlgorithm,sigtype,reason,location,null,null);
    }

    public static void sign(byte[] originalPdf, OutputStream outputStream, KeyStore keyStore, String password,InputStream sealInputStream,int[] imgLocation) throws GeneralSecurityException, IOException, DocumentException {
        String alias = keyStore.aliases().nextElement();
        PrivateKey privateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
        Certificate[] chain = keyStore.getCertificateChain(alias);
        PdfReader pdfReader = new PdfReader(originalPdf);
        sign(pdfReader, outputStream, null, chain, privateKey, DigestAlgorithms.SHA1, MakeSignature.CryptoStandard.CMS, null, null,sealInputStream,imgLocation);
    }

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