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  public static String sha256(File input) throws IOException {

    Digest sha256 = new Digest();
    sha256.update(Files.readAllBytes(input.toPath()));
    StringBuilder buff = new StringBuilder();

    for (byte b : sha256.digest()) {
      buff.append(String.format("%02x", b & 0xFF));
    }

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  public static String signXmlContent(String inputFile, String keyStoreFilePath,
      String keyStorePassword, String keyStoreAlias) throws Exception {

    KeyStore keyStore = KeyStore.getInstance("PKCS12");
    keyStore.load(new FileInputStream(keyStoreFilePath), keyStorePassword.toCharArray());
    DocumentBuilderFactory buildFactory = DocumentBuilderFactory.newInstance();
    buildFactory.setNamespaceAware(true);
    Document document = buildFactory.newDocumentBuilder().parse(inputFile);
    XMLSignatureFactory xmLSignatureFactory = XMLSignatureFactory.getInstance("DOM",
        (Provider) Class.forName("org.jcp.xml.dsig.internal.dom.XMLDSigRI").newInstance());

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Fix the AppStream Issue

[root@centos8 ~]# yum update
CentOS-8 - AppStream 71 B/s | 38 B 00:00
Error: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

As CentOS Linux 8 had reached the End Of Life (EOL) on December 31st, 2021. It means that CentOS 8 will no longer receive development resources from the official CentOS project. To keep your CentOS updated, you may update the mirrors or upgrade to CentOS Stream.

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Discuz! 4.0.0 (20051001) Crack

1. Replace the include/validate.class.php file
2. Create a discuz_license.php file in the root directory

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/*

 Copyright The Closure Library Authors.
 SPDX-License-Identifier: Apache-2.0
*/
var $jscomp = $jscomp || {};
$jscomp.scope = {};
$jscomp.arrayIteratorImpl = function(array) {
  var index = 0;
  return function() {

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jQuery(document).on('click', 'body a', function(e){ 
  e.preventDefault(); 
  var url = jQuery(this).attr('href'); 
  window.open(url, '_blank');
});

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/**
 * Path Manipulation (Input Validation and Representation, Data Flow)
 *
 * **Abstract:**
 *
 * Attackers are able to control the file system path argument, which allows them to access or
 * modify otherwise protected files.
 *
 * **Explanation:**
 *

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<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-resources-plugin</artifactId>
    <version>3.1.0</version>
    <executions>
        <execution>
            <id>copy-resources</id>
            <phase>validate</phase>
            <goals>
                <goal>copy-resources</goal>

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Install MySQL 8 on CentOS 8 in VirtualBox

** Please use the root user to edit the files and execute the commands unless further notice. **

Prerequisite

1. Install the latest VirtualBox Platform Package and the VirtualBox Extension Pack (Oracle_VM_VirtualBox_Extension_Pack-VERSION.vbox-extpack).
2. Download the latest VirtualBox Guest Additions (VBoxGuestAdditions_VERSION.iso).
3. Download the latest CentOS Linux release 8.
4. Create a new virtual machine and install the CentOS to the virtual machine. During the CentOS installation, select Workstation as Base Environment, select Container Management, Development Tools and Graphical Administration Tools as Additional software for Selected Environment. Use http://mirror.centos.org/centos/8/BaseOS/x86_64/os/ as the installation source.

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Install Oracle Database 19c on CentOS 8 in VirtualBox

** Please use the root user to edit the files and execute the commands unless further notice. **

Prerequisite

1. Install the latest VirtualBox Platform Package and the VirtualBox Extension Pack (Oracle_VM_VirtualBox_Extension_Pack-VERSION.vbox-extpack).
2. Download the latest VirtualBox Guest Additions (VBoxGuestAdditions_VERSION.iso).
3. Download the latest CentOS Stream 8.
4. Create a new virtual machine and install the CentOS to the virtual machine. During the CentOS installation, select Workstation as Base Environment, select Container Management, Development Tools and Graphical Administration Tools as Additional software for Selected Environment. Use http://mirror.centos.org/centos/8/BaseOS/x86_64/os/ as the installation source.