policyfiles

Using encryption that would need Java Policy Files in openjre

由 喜你入骨 提交于 2019-12-21 20:56:07
问题 if i want to use java and encryption with keys longer than 128bit i have to use the Java Policy Files. How to get those applications up and running with openjre? I get the same error i get using oracle jre without policy files, but i can't simply use the Oracle Policy Files? or can i? Or would building the project with openjdk help? Thank You 回答1: I found the following. It seems to solve all the policy problems i ever had. try { Field field = Class.forName("javax.crypto.JceSecurity")

Java Policy file - Deny permissions to a codebase

由 倾然丶 夕夏残阳落幕 提交于 2019-12-18 04:21:36
问题 In the Java policy file, the grant codeBase syntax specifies which codebase should be granted which permissions. for example, grant codeBase "file:/C:/abc.jar" { permission java.security.AllPermission; }; grants AllPermission to code inside abc.jar In a similar way, Is there a way to deny permissions to a specific syntax? Like this: deny codeBase "file:/C:/def.jar" { permission java.io.FilePermission; }; so that the code inside def.jar gets every other permissions except the FilePermission?

Java Policy file - Deny permissions to a codebase

由 …衆ロ難τιáo~ 提交于 2019-12-18 04:21:17
问题 In the Java policy file, the grant codeBase syntax specifies which codebase should be granted which permissions. for example, grant codeBase "file:/C:/abc.jar" { permission java.security.AllPermission; }; grants AllPermission to code inside abc.jar In a similar way, Is there a way to deny permissions to a specific syntax? Like this: deny codeBase "file:/C:/def.jar" { permission java.io.FilePermission; }; so that the code inside def.jar gets every other permissions except the FilePermission?

Applet runs in eclipse but not in browser - java security

由 拟墨画扇 提交于 2019-12-14 03:34:42
问题 Below is applet code, it uses jna.jar (https://github.com/twall/jna) to access a DLL file in system32. import javax.swing.*; import javax.print.*; import java.security.*; import java.util.ArrayList; import com.sun.jna.Library; import com.sun.jna.Native; import java.awt.*; import java.awt.event.*; import java.io.PrintWriter; import java.io.StringWriter; import com.sun.jna.Pointer; import com.sun.jna.platform.win32.WinDef.HWND; import com.sun.jna.platform.win32.WinUser; import com.sun.jna

AS3 Sockets - Policy Files

由 限于喜欢 提交于 2019-12-11 04:19:49
问题 I have a mini server listening on port 843 for <policy-file-request/> I then send down the following: <cross-domain-policy> <allow-access-from domain="*" to-ports="*"/> </cross-domain-policy> On my flash side the connection code looks like m_socket = new Socket("127.0.0.1", 4600); m_socket.addEventListener(ProgressEvent.SOCKET_DATA, OnSockData); m_socket.writeUTFBytes(String.fromCharCode(255) + String.fromCharCode(0)); m_socket.flush(); I have a separate server listening on port 4600 that

unable to fetch process time using sigar

由 一个人想着一个人 提交于 2019-12-11 02:24:40
问题 import java.io.IOException; import org.hyperic.sigar.*; public class SigarDemo { public static void main(String args[]) throws SigarException, IOException { final Sigar sigar = new Sigar(); final long[] processes = sigar.getProcList(); ProcTime pt=new ProcTime(); for (final long processId : processes) { ProcUtil.getDescription(sigar, processId); pt=sigar.getProcTime(processId); System.out.println("---"+pt.getStartTime()); } } I am trying to fetch process time of each process using sigar. I am

Java JCE Unlimited strength encryption security policy files

由 匆匆过客 提交于 2019-12-09 19:06:33
问题 Are the JCE policy files (in {java.home}/lib/security) overwritten with the standard strength policy files after a JRE update? or are these left alone on JRE update? EDIT: Does anyone know if the Mac OS X JRE ships with the unlimited policy files? Thanks Jon 回答1: In my experience using JCE policy files, it did replace the files and I was frustrated. I ended up replacing the files at first run. But at the end, using Bouncy Castle API was more appropriate, there was no need to have the

Java JCE Unlimited strength encryption security policy files

由 允我心安 提交于 2019-12-04 15:07:38
Are the JCE policy files (in {java.home}/lib/security) overwritten with the standard strength policy files after a JRE update? or are these left alone on JRE update? EDIT: Does anyone know if the Mac OS X JRE ships with the unlimited policy files? Thanks Jon In my experience using JCE policy files, it did replace the files and I was frustrated. I ended up replacing the files at first run. But at the end, using Bouncy Castle API was more appropriate, there was no need to have the unlimited strength files. It was a cleaner solution. http://www.bouncycastle.org/ 来源： https://stackoverflow.com

Using encryption that would need Java Policy Files in openjre

由 [亡魂溺海] 提交于 2019-12-04 14:59:58
if i want to use java and encryption with keys longer than 128bit i have to use the Java Policy Files. How to get those applications up and running with openjre? I get the same error i get using oracle jre without policy files, but i can't simply use the Oracle Policy Files? or can i? Or would building the project with openjdk help? Thank You I found the following. It seems to solve all the policy problems i ever had. try { Field field = Class.forName("javax.crypto.JceSecurity").getDeclaredField("isRestricted"); field.setAccessible(true); field.set(null, java.lang.Boolean.FALSE); } catch

Programmatically grant Permissions without using policy file

由 点点圈 提交于 2019-12-03 12:10:46
How to programmatically grant AllPermissions to an RMI application without using policy file? UPDATE: After some researching, I have written this custom Policy Class and installed it via Policy.setPolicy(new MyPolicy()) . Now I get the following error: invalid permission: (java.io.FilePermission \C:\eclipse\plugins\org.eclipse.osgi_3.7.0.v20110613.jar read class MyPolicy extends Policy { @Override public PermissionCollection getPermissions(CodeSource codesource) { return (new AllPermission()).newPermissionCollection(); } } Based on @EJP 's advice, I have debugged using -Djava.security.debug
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