实现ofd生成签章图片

OFD文件生成签章图片，一般可以分为以下几个步骤：

1. 准备签章图片

首先需要准备好签章图片，可以使用已有的签章图片，也可以通过API生成签章图片。签章图片格式需要符合OFD文件的要求。签章图片通常是PNG或者JPG格式，建议使用PNG格式，因为它可以支持透明度。

2. 加载签章图片

使用Java程序加载签章图片，并对其进行处理。可以使用Java的ImageIO类或者第三方库如Apache PDFBox等。

3. 在签章图片上添加签名

使用Java程序在签章图片上添加签名，可以使用Java绘图API或者第三方库如PDFBox等。

4. 保存签章图片

将签章图片保存为OFD文件可以使用第三方库如Apache PDFBox等。

具体实现过程可以参考第三方库的相关文档和示例代码。需要注意的是，签章图片的大小和位置需要与OFD文件中的签章位置相匹配，否则会导致签章无效。

相关问题

实现ofd文件电子签章流程 java

实现OFD文件电子签章流程，一般可以分为以下几个步骤：

1. 生成签章图片或获取签章图片

首先需要准备好签章图片，可以使用已有的签章图片，也可以通过API生成签章图片。签章图片格式需要符合OFD文件的要求。

2. 获取OFD文件

需要使用Java程序获取OFD文件并进行处理。可以使用OFD文件解析库或者OFD文件编辑库。

3. 在OFD文件中插入签章

将签章图片插入到OFD文件中的指定位置，并设置签章的大小、位置、透明度等属性。

4. 生成签名文件

将签名信息生成签名文件，用于验证签章的真实性。

5. 验证签章的真实性

在使用OFD文件时，需要对签章的真实性进行验证，可以使用签名验证库进行验证。

具体实现过程可以参考OFD文件编辑库和签名验证库的相关文档和示例代码。

ofd电子签章 ofdrw代码实现

以下是使用OFDRW进行OFD电子签章的Java代码示例：

import org.ofdrw.core.annotation.Annotations;
import org.ofdrw.core.annotation.pageannot.Annot;
import org.ofdrw.core.annotation.pageannot.Appearance;
import org.ofdrw.core.annotation.pageannot.CT_Annot;
import org.ofdrw.core.basicStructure.pageObj.layer.block.CT_Layer;
import org.ofdrw.core.basicStructure.pageObj.layer.block.PathObject;
import org.ofdrw.core.basicStructure.pageObj.layer.block.TextObject;
import org.ofdrw.core.basicStructure.pageObj.layer.type.ImageObject;
import org.ofdrw.core.basicStructure.pageObj.layer.type.PageBlockType;
import org.ofdrw.core.basicStructure.pageObj.layer.type.TextCode;
import org.ofdrw.core.basicStructure.res.CT_MultiMedia;
import org.ofdrw.core.basicStructure.res.Res;
import org.ofdrw.core.basicStructure.res.resources.MultiMedias;
import org.ofdrw.core.basicStructure.res.resources.Page;
import org.ofdrw.core.basicStructure.res.resources.Pages;
import org.ofdrw.core.basicStructure.res.resources.PublicRes;
import org.ofdrw.core.basicStructure.res.resources.Template;
import org.ofdrw.core.basicStructure.res.resources.Templates;
import org.ofdrw.core.basicType.ST_Box;
import org.ofdrw.core.pageDescription.CT_PageBlock;
import org.ofdrw.core.pageDescription.color.color.CT_Color;
import org.ofdrw.core.text.TextCodeExt;
import org.ofdrw.font.FontName;
import org.ofdrw.layout.OFDDoc;
import org.ofdrw.layout.PageLayout;
import org.ofdrw.layout.element.*;
import org.ofdrw.layout.element.canvas.DrawContext;
import org.ofdrw.layout.element.canvas.ImageFormObject;
import org.ofdrw.layout.element.canvas.Path;
import org.ofdrw.layout.element.canvas.TextCodePoint;
import org.ofdrw.layout.engine.ImageEngine;
import org.ofdrw.layout.engine.ResLocator;
import org.ofdrw.pkg.container.OFDEntry;
import org.ofdrw.reader.OFDReader;
import org.ofdrw.sign.SignUtils;
import org.ofdrw.sign.signContainer.SESV4Container;
import org.ofdrw.sign.signContainer.SignedData;
import org.ofdrw.sign.stamppos.NormalStampPos;
import org.ofdrw.sign.stamppos.StampPos;
import org.ofdrw.sign.verify.container.OFDSignedContainerVerify;
import org.ofdrw.sign.verify.container.SignedDataValidateResult;
import org.ofdrw.sign.verify.exceptions.ContainerNotFoundException;
import org.ofdrw.sign.verify.exceptions.SignatureValidateException;
import org.ofdrw.sign.verify.exceptions.SignatureVerifyException;
import org.ofdrw.sign.verify.exceptions.SealValidateException;
import org.ofdrw.sign.verify.signature.OFDSeal;
import org.ofdrw.sign.verify.signature.SignedValue;
import org.ofdrw.sign.verify.signature.SignedValueType;
import org.ofdrw.sign.verify.signature.exceptions.InvalidSignedValueException;
import org.ofdrw.sign.verify.signature.exceptions.SealIDNotFoundException;
import org.ofdrw.sign.verify.signature.exceptions.SealNotFoundException;
import org.ofdrw.sign.verify.signature.exceptions.SignatureNotFoundException;
import org.ofdrw.sign.verify.signature.exceptions.VersionNotSupportException;
import org.ofdrw.sign.verify.time.AuthorityInfo;
import org.ofdrw.sign.verify.time.TimeProtocolVerifier;
import org.ofdrw.simpleType.PageAreaType;
import org.ofdrw.simpleType.SizeType;
import org.ofdrw.simpleType.ST_Array;
import org.ofdrw.simpleType.ST_ID;
import org.ofdrw.simpleType.ST_Loc;
import org.ofdrw.simpleType.ST_RefID;
import org.ofdrw.simpleType.ST_Version;
import org.ofdrw.simpleType.Severity;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

public class OFDSignatureDemo {

    /**
     * 电子签章
     *
     * @param srcPath     原OFD文件路径
     * @param dstPath     签章后OFD文件路径
     * @param sealImgPath 签章图片路径
     * @param certPath    数字证书路径
     * @param password    数字证书密码
     * @throws IOException
     * @throws GeneralSecurityException
     */
    public static void sign(String srcPath, String dstPath, String sealImgPath, String certPath, String password) throws IOException, GeneralSecurityException {
        // 创建OFDDoc对象
        OFDDoc ofdDoc = new OFDDoc(new PageLayout(PageAreaType.A4, SizeType.A4));

        // 加载OFD文件
        OFDReader reader = new OFDReader(srcPath);
        reader.getConfig().setResCache(new ResLocator() {
            @Override
            public Res getRes(Path path) throws IOException {
                try (OFDEntry entry = reader.get(path)) {
                    return entry.getOfd().getDocumentRes().getPublicRes().getRes(path);
                }
            }
        });
        reader.getConfig().setImageCache(new ImageEngine() {
            @Override
            public BufferedImage getImage(Path path) throws IOException {
                try (OFDEntry entry = reader.get(path)) {
                    return ImageIO.read(entry.getStream());
                }
            }
        });
        ofdDoc.getPageTree().addAll(reader.getPageList());

        // 创建签章对象
        Image img = ImageIO.read(new File(sealImgPath));
        ST_Box boundary = new ST_Box(0, 0, img.getWidth(null), img.getHeight(null));
        ImageObject imageObject = new ImageObject(boundary, new ST_Loc("Res_0"));

        CT_Color color = new CT_Color(0, 0, 0);
        TextCode textCode = new TextCode(TextCodeExt.of("签章文字"));
        TextObject textObject = new TextObject(new ST_Box(0, 0, 100, 20), color, textCode);

        ST_Box position = new ST_Box(100, 100, 200, 200);
        CT_Annot ctAnnot = new CT_Annot();
        ctAnnot.setType(Annotations.ANNOT_TYPE_STAMP); // 签章类型
        ctAnnot.setName("签章名称");
        ctAnnot.setRect(position);
        ctAnnot.setFringe(false);
        ctAnnot.setCreator("OFDRW");
        ctAnnot.setLastModDate(OffsetDateTime.now());
        ctAnnot.setAppearance(new Appearance(new Annot(new ST_RefID("Res_1"))));
        ctAnnot.setPageRef(ofdDoc.getPageTree().get(0).getOfdPage().getBaseLoc());

        // 设置签章位置
        StampPos stampPos = new NormalStampPos(position.getMinX(), position.getMinY(), position.getMaxX(), position.getMaxY(), 0);

        // 对OFD文件进行签章
        SESV4Container sesv4Container = new SESV4Container();
        sesv4Container.setSignMethod(SignUtils.SignMethod.Nonvisible);
        sesv4Container.setDigestMethod(SignUtils.DigestMethod.SHA256);
        sesv4Container.setCertPath(certPath);
        sesv4Container.setPassword(password);
        sesv4Container.setSignedValueGenerator((digestAlgorithm, signedData) -> {
            SignedValue signedValue = new SignedValue();
            signedValue.setSignedValueType(SignedValueType.Seal);
            signedValue.setIndex(1);
            signedValue.setSignedData(signedData);
            signedValue.setCertDigest(new byte[1][1]);
            signedValue.setDigestAlgorithm(digestAlgorithm);
            signedValue.setSignatureAlgorithm("1.2.840.113549.1.1.11"); // SHA256withRSA
            signedValue.setSeal((new OFDSeal(imageObject, textObject, ctAnnot, stampPos)).toofdByteBuffer());
            return signedValue;
        });
        ofdDoc.addSign(sesv4Container);

        // 保存签章后的OFD文件
        ofdDoc.save(dstPath);
        ofdDoc.close();
    }

    /**
     * 验证电子签章
     *
     * @param filePath        需要验证的OFD文件路径
     * @param trustedCertsDir 可信数字证书路径
     * @throws IOException
     * @throws ContainerNotFoundException
     * @throws SignatureNotFoundException
     * @throws SignatureValidateException
     * @throws SealNotFoundException
     * @throws SealIDNotFoundException
     * @throws InvalidSignedValueException
     * @throws VersionNotSupportException
     * @throws CertificateException
     * @throws SealValidateException
     * @throws SignatureVerifyException
     */
    public static void verify(String filePath, String trustedCertsDir) throws IOException, ContainerNotFoundException, SignatureNotFoundException, SignatureValidateException, SealNotFoundException, SealIDNotFoundException, InvalidSignedValueException, VersionNotSupportException, CertificateException, SealValidateException, SignatureVerifyException {
        // 加载OFD文件
        OFDReader reader = new OFDReader(filePath);

        // 验证数字签名
        OFDSignedContainerVerify verifier = new OFDSignedContainerVerify(reader);
        verifier.setTrustedCertDir(trustedCertsDir);
        SignedDataValidateResult result = verifier.verify();
        if (result.isSignatureValid() && result.isSealValid()) {
            System.out.println("电子签章验证通过");
        } else {
            System.out.println("电子签章验证失败");
        }
    }

    public static void main(String[] args) throws IOException, GeneralSecurityException {
        String srcPath = "src/main/resources/test.ofd";
        String dstPath = "src/main/resources/test-signed.ofd";
        String sealImgPath = "src/main/resources/seal.png";
        String certPath = "src/main/resources/test.pfx";
        String password = "123456";

        // 电子签章
        sign(srcPath, dstPath, sealImgPath, certPath, password);

        // 验证电子签章
        verify(dstPath, "src/main/resources/certs");
    }
}

注意，该示例中使用的数字证书为测试证书，仅供演示使用。在实际应用中应使用合法有效的数字证书，并且签章过程需要遵循相关法律法规和标准规范。