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Wrap System.load and System.loadLibrary calls with doPrivileged. #204

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Wrap System.load and System.loadLibrary calls with doPrivileged. #204

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24 changes: 22 additions & 2 deletions src/java/net/jpountz/util/Native.java
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src/java/net/jpountz/util/Native.java

Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,8 @@
import java.io.IOException;
import java.io.InputStream;
import java.io.FilenameFilter;
import java.security.AccessController;
import java.security.PrivilegedAction;

/** FOR INTERNAL USE ONLY */
public enum Native {
Expand Down Expand Up @@ -95,6 +97,24 @@ public boolean accept(File dir, String name) {
}
}

private static void loadLibrary(final String libName) {
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
System.loadLibrary(libName);
return null;
}
});
}

private static void loadLibraryFile(final String libFileName) {
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
System.load(libFileName);
return null;
}
});
}

public static synchronized void load() {
if (loaded) {
return;
Expand All @@ -104,7 +124,7 @@ public static synchronized void load() {

// Try to load lz4-java (liblz4-java.so on Linux) from the java.library.path.
try {
System.loadLibrary("lz4-java");
loadLibrary("lz4-java");
loaded = true;
return;
} catch (UnsatisfiedLinkError ex) {
Expand Down Expand Up @@ -134,7 +154,7 @@ public static synchronized void load() {
out.write(buf, 0, read);
}
}
System.load(tempLib.getAbsolutePath());
loadLibraryFile(tempLib.getAbsolutePath());
loaded = true;
} catch (IOException e) {
throw new ExceptionInInitializerError("Cannot unpack liblz4-java: " + e);
Expand Down