使用itext5进行文字或图片签章

最新推荐文章于 2023-01-31 11:33:20 发布

merrick326

最新推荐文章于 2023-01-31 11:33:20 发布

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分类专栏：中间件编程语言文章标签： java

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记录一下使用iText5组件进行pdf文字或图片签章

库文件：bcmail-jdk14-1.38.jar， bcpkix-jdk15on-1.54.jar， bcprov-jdk14-1.38.jar， bcprov-jdk15on-1.54.jar，itext-asian-5.2.0.jar，itextpdf-5.5.12.jar

输入：自建的PDF文件、pkcs12密钥证书、自定义签章图片、自定义文字信息、外部字体

输出：签章后的PDF文件

用途：PDF浏览器可以识别该文件在Signature之后是否被修改过

    KeyStore ks = KeyStore.getInstance("PKCS12");
    ks.load(new FileInputStream("D:/ex/pdfsign2.p12"), "123456".toCharArray());//STOREPASS，密钥库
    String alias = ks.aliases().nextElement();
    PrivateKey pk = (PrivateKey) ks.getKey(alias,"123456".toCharArray() );//KEYPASS ，私钥
    Certificate[] cer = ks.getCertificateChain(alias);    //证书

    PdfReader read = new PdfReader("d:/ex/test2.pdf");
    FileOutputStream os = new FileOutputStream("d:/ex/test2_sig.pdf");
    PdfStamper pstp = PdfStamper.createSignature(read, os, '\0', null, true);//签证工具类对象,true表示可以反复签章(详见http://itextsupport.com/apidocs/itext5)
    PdfSignatureAppearance psa = pstp.getSignatureAppearance();    //签章属性对象
    Image img = Image.getInstance("D:\\0001_ICONS\\bee.jpg");
    psa.setSignatureGraphic(img);           //签章图片
    psa.setReason("Private Reason[个人原因]");
    psa.setLocation("太阳系地球北半球东经120°");
    psa.setVisibleSignature(new Rectangle(180, 100, 650, 170),1,"sigflag1");
    psa.setSignDate(Calendar.getInstance());
    psa.setRenderingMode(RenderingMode.GRAPHIC_AND_DESCRIPTION);
    psa.setCertificationLevel(PdfSignatureAppearance.CERTIFIED_FORM_FILLING_AND_ANNOTATIONS);
    BaseFont f3 = BaseFont.createFont("fonts/MSYH.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);//外部字体
    //BaseFont f = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
    psa.setLayer2Font(new Font(f3,10,Font.NORMAL,BaseColor.BLUE));

    ExternalDigest dg = new BouncyCastleDigest(); //摘要算法
    ExternalSignature es = new PrivateKeySignature(pk,DigestAlgorithms.SHA1,null);//签名算法

    MakeSignature.signDetached(psa, dg, es, cer, null, null, null, 0, CryptoStandard.CMS);//签章

    JOptionPane.showMessageDialog(null, "完成!");


/**
* 密钥建立
* keytool -genkey -v -alias merrickpdfsign2 -keyalg RSA -storetype PKCS12 -keystore D:/ex/pdfsign2.p12 -storepass 123456 -keypass 123456
* */