Added support for bcrypt

build.gradle

@@ -33,8 +33,11 @@ dependencies {
 	modImplementation  "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
 
     // Argon2 library for password hashing
-	implementation 'de.mkammerer:argon2-jvm:2.6'
+	implementation "de.mkammerer:argon2-jvm:${project.argon2_version}"
-	include 'de.mkammerer:argon2-jvm:2.6'
+	include "de.mkammerer:argon2-jvm:${project.argon2_version}"
+
+	// BCrypt
+	implementation "at.favre.lib:bcrypt:${project.bcrypt_version}"
 
 	// leveldb
 	implementation group: 'org.iq80.leveldb', name: 'leveldb', version: '0.12'

gradle.properties

@@ -10,10 +10,14 @@ loader_version=0.9.0+build.204
 fabric_version=0.16.0+build.384-1.16.1
 
 # Mod Properties
-mod_version = 1.4.8
+mod_version = 1.5.0
 maven_group = org.samo_lego
 archives_base_name = simpleauth
 
 # Carpet for debugging
 carpet_core_version = 1.4.0+v200623
 carpet_branch = 1.16
+
+# Hashing
+argon2_version = 2.7
+bcrypt_version = 0.9.0

src/main/java/org/samo_lego/simpleauth/commands/AccountCommand.java

@@ -120,7 +120,7 @@ public class AccountCommand {
                 }
                 // JSON object holding password (may hold some other info in the future)
                 JsonObject playerdata = new JsonObject();
-                String hash = AuthHelper.hashPass(newPass.toCharArray());
+                String hash = AuthHelper.hashPassword(newPass.toCharArray());
                 playerdata.addProperty("password", hash);
 
                 SimpleAuth.DB.updateUserData(convertUuid(player), playerdata.toString());

src/main/java/org/samo_lego/simpleauth/commands/AuthCommand.java

@@ -114,7 +114,7 @@ public class AuthCommand {
         // Different thread to avoid lag spikes
         THREADPOOL.submit(() -> {
             // Writing the global pass to config
-            config.main.globalPassword = AuthHelper.hashPass(pass.toCharArray());
+            config.main.globalPassword = AuthHelper.hashPassword(pass.toCharArray());
             config.main.enableGlobalPassword = true;
             config.save(new File("./mods/SimpleAuth/config.json"));
         });
@@ -133,6 +133,7 @@ public class AuthCommand {
         config.worldSpawn.x = x;
         config.worldSpawn.y = y;
         config.worldSpawn.z = z;
+        config.main.spawnOnJoin = true;
         config.save(new File("./mods/SimpleAuth/config.json"));
 
         // Getting sender
@@ -167,7 +168,7 @@ public class AuthCommand {
         THREADPOOL.submit(() -> {
             // JSON object holding password (may hold some other info in the future)
             JsonObject playerdata = new JsonObject();
-            String hash = AuthHelper.hashPass(password.toCharArray());
+            String hash = AuthHelper.hashPassword(password.toCharArray());
             playerdata.addProperty("password", hash);
 
             if (DB.registerUser(uuid, playerdata.toString())) {
@@ -188,7 +189,7 @@ public class AuthCommand {
         THREADPOOL.submit(() -> {
             // JSON object holding password (may hold some other info in the future)
             JsonObject playerdata = new JsonObject();
-            String hash = AuthHelper.hashPass(password.toCharArray());
+            String hash = AuthHelper.hashPassword(password.toCharArray());
             playerdata.addProperty("password", hash);
 
             DB.updateUserData(uuid, playerdata.toString());

src/main/java/org/samo_lego/simpleauth/commands/RegisterCommand.java

@@ -63,7 +63,7 @@ public class RegisterCommand {
                 ), false);
                 return;
             }
-            String hash = AuthHelper.hashPass(pass1.toCharArray());
+            String hash = AuthHelper.hashPassword(pass1.toCharArray());
             // JSON object holding password (may hold some other info in the future)
             JsonObject playerdata = new JsonObject();
             playerdata.addProperty("password", hash);

src/main/java/org/samo_lego/simpleauth/event/AuthEventHandler.java

@@ -12,7 +12,6 @@ import net.minecraft.text.LiteralText;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.TypedActionResult;
 import net.minecraft.util.math.BlockPos;
-import org.samo_lego.simpleauth.SimpleAuth;
 import org.samo_lego.simpleauth.mixin.BlockUpdateS2CPacketAccessor;
 import org.samo_lego.simpleauth.storage.PlayerCache;
 
@@ -81,8 +80,8 @@ public class AuthEventHandler {
                 return;
             }
             // Ugly fix for #13
-            player.setInvulnerable(SimpleAuth.config.experimental.playerInvulnerable);
+            player.setInvulnerable(config.experimental.playerInvulnerable);
-            player.setInvisible(SimpleAuth.config.experimental.playerInvisible);
+            player.setInvisible(config.experimental.playerInvisible);
 
             // Invalidating session
             playerCache.wasAuthenticated = false;
@@ -91,6 +90,7 @@ public class AuthEventHandler {
         else {
             deauthenticatePlayer(player);
             playerCache = deauthenticatedUsers.get(uuid);
+            playerCache.wasOnFire = false;
         }
 
         if(config.main.spawnOnJoin)

src/main/java/org/samo_lego/simpleauth/storage/AuthConfig.java

@@ -115,6 +115,8 @@ public class AuthConfig {
         public boolean allowItemUse = false;
         // Allows attacking mobs
         public boolean allowEntityPunch = false;
+        // Whether to use BCrypt instead of Argon2 (GLIBC_2.25 error)
+        public boolean useBCryptLibrary = false;
     }
     private static final Gson gson = new GsonBuilder()
             .setPrettyPrinting()

src/main/java/org/samo_lego/simpleauth/storage/PlayerCache.java

@@ -17,7 +17,7 @@ public class PlayerCache {
     public long validUntil;
 
     public int lastAir = 300;
-    public boolean wasOnFire = false;
+    public boolean wasOnFire;
 
     public String lastDim;
     public double lastX;
@@ -44,6 +44,9 @@ public class PlayerCache {
             this.lastY = player.getY();
             this.lastZ = player.getZ();
         }
+        else {
+            this.wasOnFire = false;
+        }
 
         if(DB.isUserRegistered(uuid)) {
             String data = DB.getData(uuid);

src/main/java/org/samo_lego/simpleauth/utils/AuthHelper.java

@@ -2,42 +2,29 @@ package org.samo_lego.simpleauth.utils;
 
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
-import de.mkammerer.argon2.Argon2;
-import de.mkammerer.argon2.Argon2Factory;
 import org.samo_lego.simpleauth.SimpleAuth;
+import org.samo_lego.simpleauth.utils.hashing.HasherArgon2;
+import org.samo_lego.simpleauth.utils.hashing.HasherBCrypt;
 
-import static org.samo_lego.simpleauth.utils.SimpleLogger.logError;
+import static org.samo_lego.simpleauth.SimpleAuth.config;
 
 public class AuthHelper {
-
-    // Creating the instance
-    private static final Argon2 argon2 = Argon2Factory.create();
-
     // Json parser
     private static final JsonParser parser = new JsonParser();
 
     // Returns 1 if password is correct, 0 if not
     // and -1 if user is not registered yet
     public static int checkPass(String uuid, char[] pass) {
-        if(SimpleAuth.config.main.enableGlobalPassword) {
+        if(config.main.enableGlobalPassword) {
             // We have global password enabled
-            try {
+            return verifyPassword(pass, config.main.globalPassword) ? 1 : 0;
-                return argon2.verify(SimpleAuth.config.main.globalPassword, pass) ? 1 : 0;
-            }
-            catch (Error e) {
-                logError("Argon2 error: " + e);
-                return 0;
-            } finally {
-                // Wipe confidential data
-                argon2.wipeArray(pass);
-            }
         }
         else {
-            try {
             String hashed;
             // Password from cache
             if(SimpleAuth.deauthenticatedUsers.containsKey(uuid))
                 hashed = SimpleAuth.deauthenticatedUsers.get(uuid).password;
+
             // Hashed password from DB
             else {
                 JsonObject json = parser.parse(SimpleAuth.DB.getData(uuid)).getAsJsonObject();
@@ -46,24 +33,24 @@ public class AuthHelper {
 
             if(hashed.equals(""))
                 return -1;  // User is not yet registered
+
             // Verify password
-                return argon2.verify(hashed, pass) ? 1 : 0;
+            return verifyPassword(pass, hashed) ? 1 : 0;
-            } catch (Error e) {
-                logError("Argon2 error: " + e);
-                return 0;
-            } finally {
-                // Wipe confidential data
-                argon2.wipeArray(pass);
         }
     }
+
+    public static String hashPassword(char[] pass) {
+        if(config.experimental.useBCryptLibrary)
+            return HasherBCrypt.hash(pass);
+        else
+            return HasherArgon2.hash(pass);
     }
-    // Hashing the password with the Argon2 power
+
-    public static String hashPass(char[] pass) {
+
-        try {
+    private static boolean verifyPassword(char[] pass, String hashed) {
-            return argon2.hash(10, 65536, 1, pass);
+        if(config.experimental.useBCryptLibrary)
-        } catch (Error e) {
+            return HasherBCrypt.verify(pass, hashed);
-            logError(e.getMessage());
+        else
-        }
+            return HasherArgon2.verify(pass, hashed);
-        return null;
     }
 }

src/main/java/org/samo_lego/simpleauth/utils/hashing/HasherArgon2.java

@@ -0,0 +1,35 @@
+package org.samo_lego.simpleauth.utils.hashing;
+
+import de.mkammerer.argon2.Argon2;
+import de.mkammerer.argon2.Argon2Factory;
+
+import static org.samo_lego.simpleauth.utils.SimpleLogger.logError;
+
+public class HasherArgon2 {
+
+    // Creating the instance
+    private static final Argon2 HASHER = Argon2Factory.create();
+
+    public static boolean verify(char[] pass, String hashed) {
+        try {
+            return HASHER.verify(hashed, pass);
+        }
+        catch (Error e) {
+            logError("Argon2 password verification error: " + e);
+            return false;
+        } finally {
+            // Wipe confidential data
+            HASHER.wipeArray(pass);
+        }
+    }
+
+    // Hashing the password with the Argon2 power
+    public static String hash(char[] pass) {
+        try {
+            return HASHER.hash(10, 65536, 1, pass);
+        } catch (Error e) {
+            logError("Argon2 password hashing error: " + e);
+        }
+        return null;
+    }
+}

src/main/java/org/samo_lego/simpleauth/utils/hashing/HasherBCrypt.java

@@ -0,0 +1,28 @@
+package org.samo_lego.simpleauth.utils.hashing;
+
+import at.favre.lib.crypto.bcrypt.BCrypt;
+
+import static org.samo_lego.simpleauth.utils.SimpleLogger.logError;
+
+public class HasherBCrypt {
+
+    public static boolean verify(char[] pass, String hashed) {
+        try {
+            return BCrypt.verifyer().verify(pass, hashed).verified;
+        }
+        catch (Error e) {
+            logError("BCrypt password verification error: " + e);
+            return false;
+        }
+    }
+
+    // Hashing the password with the Argon2 power
+    public static String hash(char[] pass) {
+        try {
+            return BCrypt.withDefaults().hashToString(12, pass);
+        } catch (Error e) {
+            logError("BCrypt password hashing error: " + e);
+        }
+        return null;
+    }
+}