前一段时间使用aspose.slides for java,处理了下才去除的水印,但是时间一久就忘记了,重新整理了下
下载aspose-slides-19.3-jdk16.jar,重命名为aspose.slides-19.3.jar(为了在maven应用才改名的)
(1)使用jd-gui查看jar包
注册文件的加载类License
package com.aspose.slides;
import com.aspose.slides.exceptions.InvalidOperationException;
import com.aspose.slides.internal.k5.return;
import com.aspose.slides.ms.System.IDisposable;
import com.aspose.slides.ms.System.p;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
public class License
implements ILicense
{
public void setLicense(InputStream stream)
throws AsposeLicenseException
{
try
{
ByteArrayInputStream localByteArrayInputStream = null;
if (stream != null)
{
localObject = new ByteArrayOutputStream();
byte[] arrayOfByte = new byte[1024];
int i;
while ((i = stream.read(arrayOfByte)) > 0)
((ByteArrayOutputStream)localObject).write(arrayOfByte, 0, i);
((ByteArrayOutputStream)localObject).flush();
localByteArrayInputStream = new ByteArrayInputStream(((ByteArrayOutputStream)localObject).toByteArray());
}
Object localObject = new return();
((return)localObject).jdMethod_do(localByteArrayInputStream);
}
catch (IOException localIOException1)
{
throw new InvalidOperationException("License stream is not available for reading");
}
}
public void setLicense(String namePath)
throws AsposeLicenseException
{
try
{
FileInputStream localFileInputStream = null;
if ((null != namePath) && (!"".equals(namePath)))
localFileInputStream = new FileInputStream(namePath);
setLicense(localFileInputStream);
}
catch (FileNotFoundException localFileNotFoundException1)
{
throw new InvalidOperationException("License stream is not available for reading");
}
}
public static String getVersion()
{
return return.jdMethod_new();
}
public void resetLicense()
{
return.jdMethod_for();
}
public boolean isLicensed()
{
int i = 0;
Presentation localPresentation = new Presentation();
try
{
ISlide localISlide = localPresentation.getSlides().addEmptySlide(localPresentation.getLayoutSlides().getByType(11));
IAutoShape localIAutoShape = localISlide.getShapes().addAutoShape(5, 10.0F, 10.0F, 200.0F, 100.0F);
localIAutoShape.getTextFrame().setText(p.jdMethod_if("", 500, 'a'));
i = localIAutoShape.getTextFrame().getText().length() == 500 ? 1 : 0;
}
finally
{
if (localPresentation != null)
localPresentation.dispose();
}
return i;
}
}
主要的处理类为return
说明:具体是是哪一个类,要看具体情况,不同的版本是有差异的
关键代码
private static void jdField_do(Node paramNode1, Node paramNode2, String[] paramArrayOfString)
{
PublicKey localPublicKey = null;
Object localObject;
try
{
KeyFactory localKeyFactory = KeyFactory.getInstance("RSA");
localObject = void.jdField_do(jdField_if(paramArrayOfString));
localPublicKey = localKeyFactory.generatePublic((KeySpec)localObject);
}
catch (Exception localException1)
{
new float()
{
}
.jdField_do(new throws()
{
}
.jdField_if, localException1);
}
try
{
String str1 = paramNode1 != null ? jdField_do(paramNode1) : "";
localObject = str1.getBytes("UTF-16LE");
String str2 = paramNode2 != null ? paramNode2.getFirstChild().getNodeValue() : "";
byte[] arrayOfByte = try.jdField_do(str2);
Signature localSignature = Signature.getInstance("SHA1withRSA");
localSignature.initVerify(localPublicKey);
localSignature.update(localObject);
if (!localSignature.verify(arrayOfByte))
new float()
{
}
.jdField_do(new throws()
{
}
.jdField_for);
}
catch (Exception localException2)
{
new float()
{
}
.jdField_do(new throws()
{
}
.jdField_int, localException2);
}
}
(2)使用javassist
使用rsa加密验证许可证的合法性,屏蔽验证过程许可证即有效
用进行代码修改
import javassist.ClassPool;
import javassist.CtClass;
import javassist.CtMethod;
public class Main {
public static void main(String[] args) {
try {
ClassPool.getDefault().insertClassPath(
"lib/aspose.slides-19.3.jar");
CtClass c2 = ClassPool.getDefault()
.getCtClass("com.aspose.slides.internal.k5.return");
CtMethod[] ms = c2.getDeclaredMethods();
for (CtMethod c : ms) {
System.out.println(c.getName());
CtClass[] ps = c.getParameterTypes();
for (CtClass cx : ps) {
System.out.println("\t" + cx.getName());
}
if (ps.length == 3
&& ps[0].getName().equals("org.w3c.dom.Node")
&& ps[1].getName().equals("org.w3c.dom.Node")) {
System.out.println("find it!");
c.setBody("{return;}");
}
}
c2.writeFile();
} catch (Exception e) {
e.printStackTrace();
}
}
}
说明:
javassist下载使用参考
重新生成jar包:
a. 将以前的 aspose.slides-19.3.jar 修改aspose.slides-19.3.zip
b. 解压 aspose.slides-19.3.zip 为 aspose.slides-19.3
c. 将刚才生成的 com\aspose\slides\internal\mx\return.class 替换掉 aspose.slides-19.3 里的 return.class
d. 将 META-INF 下除了 MANIFEST.MF 其他文件都删掉
e. 压缩 aspose.slides-19.3 为 aspose.slides-19.3.zip
f. 修改文件名为 aspose.slides-19.3.jar
(3)许可文件 license.xml
<License>
<Data>
<Products>
<Product>Aspose.Total for Java</Product>
</Products>
<EditionType>Enterprise</EditionType>
<SubscriptionExpiry>20991231</SubscriptionExpiry>
<LicenseExpiry>20991231</LicenseExpiry>
<SerialNumber>------</SerialNumber>
</Data>
<Signature>------</Signature>
</License>
aspose.slides使用
注意:此教程及下载文件只允许学习使用,不得用于商业用途,请购买授权正版 apose