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Un-jankify root user detection

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This commit is contained in:
Noah van der Aa 2024-04-25 19:13:12 +02:00
parent bab31b6f55
commit f4c7639986
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2 changed files with 6 additions and 23 deletions
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25
patches/server/0648-Add-root-admin-user-detection.patch
View File

@ -12,19 +12,16 @@ Co-authored-by: Noah van der Aa <ndvdaa@gmail.com>
diff --git a/src/main/java/io/papermc/paper/util/ServerEnvironment.java b/src/main/java/io/papermc/paper/util/ServerEnvironment.java
new file mode 100644
index 0000000000000000000000000000000000000000..6bd0afddbcc461149dfe9a5c7a86fff6ea13a5f1
index 0000000000000000000000000000000000000000..68098dfe716e93aafcca4d8d5b5a81d8648b3654
--- /dev/null
+++ b/src/main/java/io/papermc/paper/util/ServerEnvironment.java
@@ -0,0 +1,40 @@
@@ -0,0 +1,23 @@
+package io.papermc.paper.util;
+
+import com.sun.security.auth.module.NTSystem;
+import com.sun.security.auth.module.UnixSystem;
+import org.apache.commons.lang.SystemUtils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Set;
+import org.apache.commons.lang.SystemUtils;
+
+public class ServerEnvironment {
+ private static final boolean RUNNING_AS_ROOT_OR_ADMIN;
@ -34,21 +31,7 @@ index 0000000000000000000000000000000000000000..6bd0afddbcc461149dfe9a5c7a86fff6
+ if (SystemUtils.IS_OS_WINDOWS) {
+ RUNNING_AS_ROOT_OR_ADMIN = Set.of(new NTSystem().getGroupIDs()).contains(WINDOWS_HIGH_INTEGRITY_LEVEL);
+ } else {
+ boolean isRunningAsRoot = false;
+ if (new UnixSystem().getUid() == 0) {
+ // Due to an OpenJDK bug (https://bugs.openjdk.java.net/browse/JDK-8274721), UnixSystem#getUid incorrectly
+ // returns 0 when the user doesn't have a username. Because of this, we'll have to double-check if the user ID is
+ // actually 0 by running the id -u command.
+ try {
+ Process process = new ProcessBuilder("id", "-u").start();
+ process.waitFor();
+ InputStream inputStream = process.getInputStream();
+ isRunningAsRoot = new String(inputStream.readAllBytes()).trim().equals("0");
+ } catch (InterruptedException | IOException ignored) {
+ isRunningAsRoot = false;
+ }
+ }
+ RUNNING_AS_ROOT_OR_ADMIN = isRunningAsRoot;
+ RUNNING_AS_ROOT_OR_ADMIN = new UnixSystem().getUid() == 0;
+ }
+ }
+

4
patches/server/0781-Detect-headless-JREs.patch
View File

@ -8,10 +8,10 @@ This patch detects the missing dependency and stops the server with a clear erro
containing a link to instructions on how to install a non-headless JRE.
diff --git a/src/main/java/io/papermc/paper/util/ServerEnvironment.java b/src/main/java/io/papermc/paper/util/ServerEnvironment.java
index 6bd0afddbcc461149dfe9a5c7a86fff6ea13a5f1..148d233f4f5278ff39eacdaa0f4f0e7d73be936a 100644
index 68098dfe716e93aafcca4d8d5b5a81d8648b3654..2b7070e0cefa7cf0777df159693750fea14e800b 100644
--- a/src/main/java/io/papermc/paper/util/ServerEnvironment.java
+++ b/src/main/java/io/papermc/paper/util/ServerEnvironment.java
@@ -37,4 +37,14 @@ public class ServerEnvironment {
@@ -20,4 +20,14 @@ public class ServerEnvironment {
public static boolean userIsRootOrAdmin() {
return RUNNING_AS_ROOT_OR_ADMIN;
}