config: loosen parser to match reality

Mid-line comments, mixed case.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/java/com/wireguard/config/Attribute.java

@@ -42,7 +42,7 @@ enum Attribute {
     static {
         KEY_MAP = new HashMap<>(Attribute.values().length);
         for (final Attribute key : Attribute.values()) {
-            KEY_MAP.put(key.token, key);
+            KEY_MAP.put(key.token.toLowerCase(), key);
         }
     }
 
@@ -67,7 +67,7 @@ enum Attribute {
     }
 
     public static Attribute match(final CharSequence line) {
-        return KEY_MAP.get(SEPARATOR_PATTERN.split(line)[0]);
+        return KEY_MAP.get(SEPARATOR_PATTERN.split(line)[0].toLowerCase());
     }
 
     public static InetAddress parseIPString(final String address) {

app/src/main/java/com/wireguard/config/Config.java

@@ -41,12 +41,16 @@ public class Config {
         String line;
         boolean inInterfaceSection = false;
         while ((line = reader.readLine()) != null) {
-            if (line.isEmpty() || line.startsWith("#"))
+            final int commentIndex = line.indexOf('#');
+            if (commentIndex != -1)
+                line = line.substring(0, commentIndex);
+            line = line.trim();
+            if (line.isEmpty())
                 continue;
-            if ("[Interface]".equals(line)) {
+            if ("[Interface]".toLowerCase().equals(line.toLowerCase())) {
                 currentPeer = null;
                 inInterfaceSection = true;
-            } else if ("[Peer]".equals(line)) {
+            } else if ("[Peer]".toLowerCase().equals(line.toLowerCase())) {
                 currentPeer = new Peer();
                 config.peers.add(currentPeer);
                 inInterfaceSection = false;