Implement SOCK and SCKE

Author: FalsePattern

README.MD

@@ -81,6 +81,8 @@ Additionally, the following fingerprints are currently supported (more to come):
 - [PERL](./docs/catseye/library/PERL.markdown) (Disabled by default, needs command line flag)
 - [REFC](./docs/catseye/library/REFC.markdown)
 - [ROMA](./docs/catseye/library/ROMA.markdown)
+- [SOCK](https://rcfunge98.com/rcsfingers.html#SOCK)
+- [SCKE](https://www.rcfunge98.com/rcfunge2_manual.html#SCKE)
 - [STRN](https://rcfunge98.com/rcsfingers.html#STRN)
 - [TOYS](./docs/catseye/library/TOYS.markdown)
 - [TURT](./docs/catseye/library/TURT.markdown) (Broken, disabled in source code, will be fixed in the future)

src/main/java/com/falsepattern/jfunge/Main.java

@@ -69,6 +69,10 @@ public static void main(String[] args) throws IOException, ParseException {
                                 .longOpt("perl")
                                 .desc("Enable the PERL fingerprint. This requires the working directory of the interpreter to be writable, and is also an arbitrary code execution risk.")
                                 .build());
+        options.addOption(Option.builder()
+                                .longOpt("sock")
+                                .desc("Enable the SOCK and SCKE fingerprints. This allows the program to open a socket and listen for connections, as well as connect to external hosts. This is a very dangerous permission to grant, it can potentially allow remote code execution.")
+                                .build());
         val parser = new DefaultParser();
         val cmd = parser.parse(options, args);
         if (cmd.hasOption("help")) {

src/main/java/com/falsepattern/jfunge/interpreter/FeatureSet.java

@@ -14,5 +14,7 @@ public class FeatureSet {
     public final boolean environment;
     public final long maxIter;
 
+    //Dangerous fingerpritns
     public final boolean perl;
+    public final boolean socket;
 }

src/main/java/com/falsepattern/jfunge/interpreter/Interpreter.java

@@ -4,6 +4,7 @@
 import com.falsepattern.jfunge.interpreter.instructions.Instruction;
 import com.falsepattern.jfunge.interpreter.instructions.InstructionManager;
 import com.falsepattern.jfunge.interpreter.instructions.fingerprints.PERL;
+import com.falsepattern.jfunge.interpreter.instructions.fingerprints.SOCK;
 import com.falsepattern.jfunge.ip.IP;
 import com.falsepattern.jfunge.ip.impl.InstructionPointer;
 import com.falsepattern.jfunge.storage.FungeSpace;
@@ -203,6 +204,11 @@ public Interpreter(String[] args, InputStream input, OutputStream output, FileIO
         if (!featureSet.perl) {
             fingerprintBlackList.add(PERL.INSTANCE.code());
         }
+
+        if (!featureSet.socket) {
+            fingerprintBlackList.add(SOCK.INSTANCE.code());
+            fingerprintBlackList.add(SOCK.SCKE.INSTANCE.code());
+        }
     }
 
     @SneakyThrows

src/main/java/com/falsepattern/jfunge/interpreter/instructions/Funge98.java

@@ -22,6 +22,7 @@
 import com.falsepattern.jfunge.interpreter.instructions.fingerprints.PERL;
 import com.falsepattern.jfunge.interpreter.instructions.fingerprints.REFC;
 import com.falsepattern.jfunge.interpreter.instructions.fingerprints.ROMA;
+import com.falsepattern.jfunge.interpreter.instructions.fingerprints.SOCK;
 import com.falsepattern.jfunge.interpreter.instructions.fingerprints.STRN;
 import com.falsepattern.jfunge.interpreter.instructions.fingerprints.TOYS;
 import com.falsepattern.jfunge.interpreter.instructions.fingerprints._3DSP;
@@ -72,6 +73,8 @@ public class Funge98 implements InstructionSet {
         addFingerprint(PERL.INSTANCE);
         addFingerprint(REFC.INSTANCE);
         addFingerprint(ROMA.INSTANCE);
+        addFingerprint(SOCK.INSTANCE);
+        addFingerprint(SOCK.SCKE.INSTANCE);
         addFingerprint(STRN.INSTANCE);
         addFingerprint(TOYS.INSTANCE);
         //TODO Fix TURT, it's broken