2 files changed, 23 insertions, 7 deletions
diff --git a/src/main/java/net/elytrium/limboauth/Settings.java b/src/main/java/net/elytrium/limboauth/Settings.java
index add2ea2..edbe130 100644
--- a/src/main/java/net/elytrium/limboauth/Settings.java
+++ b/src/main/java/net/elytrium/limboauth/Settings.java
@@ -69,12 +69,13 @@ public class Settings extends Config {
     @Comment({
         "If you want to migrate your database from another plugin, which is not using BCrypt.",
         "You can set an old hash algorithm to migrate from.",
-        "AUTHME - AuthMe SHA256(SHA256(password) + salt) that looks like $SHA$salt$password",
-        "SHA256_NP - SHA256(password) that looks like SHA$salt$password",
-        "SHA256_P - SHA256(password) that looks like $SHA$salt$password",
-        "SHA512_NP - SHA512(password) that looks like SHA$salt$password",
-        "SHA512_P - SHA512(password) that looks like $SHA$salt$password",
-        "MD5 - Basic md5 hash"
+        "AUTHME - AuthMe SHA256(SHA256(password) + salt) that looks like $SHA$salt$hash",
+        "SHA256_NP - SHA256(password) that looks like SHA$salt$hash",
+        "SHA256_P - SHA256(password) that looks like $SHA$salt$hash",
+        "SHA512_NP - SHA512(password) that looks like SHA$salt$hash",
+        "SHA512_P - SHA512(password) that looks like $SHA$salt$hash",
+        "MD5 - Basic md5 hash",
+        "Argon2 - Argon2 hash that looks like $argon2i$v=1234$m=1234,t=1234,p=1234$hash",
     })
     public String MIGRATION_HASH = "";
     @Comment("Available dimensions: OVERWORLD, NETHER, THE_END")
diff --git a/src/main/java/net/elytrium/limboauth/migration/MigrationHash.java b/src/main/java/net/elytrium/limboauth/migration/MigrationHash.java
index d127b1e..4f7ae24 100644
--- a/src/main/java/net/elytrium/limboauth/migration/MigrationHash.java
+++ b/src/main/java/net/elytrium/limboauth/migration/MigrationHash.java
@@ -17,6 +17,8 @@
 
 package net.elytrium.limboauth.migration;
 
+import de.mkammerer.argon2.Argon2;
+import de.mkammerer.argon2.Argon2Factory;
 import java.math.BigInteger;
 import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
@@ -24,12 +26,12 @@ import java.security.NoSuchAlgorithmException;
 
 @SuppressWarnings("unused")
 public enum MigrationHash {
-
   AUTHME((hash, password) -> {
     String[] arr = hash.split("\\$"); // $SHA$salt$hash
     return arr.length == 4
         && arr[3].equals(MigrationHash.getDigest(MigrationHash.getDigest(password, "SHA-256") + arr[2], "SHA-256"));
   }),
+  ARGON2(new Argon2Verifier()),
   SHA512_NP((hash, password) -> {
     String[] arr = hash.split("\\$"); // SHA$salt$hash
     return arr.length == 3 && arr[2].equals(MigrationHash.getDigest(password + arr[1], "SHA-512"));
@@ -71,4 +73,17 @@ public enum MigrationHash {
       throw new IllegalArgumentException(e);
     }
   }
+
+  private static class Argon2Verifier implements MigrationHashVerifier {
+    private Argon2 argon2;
+
+    @Override
+    public boolean checkPassword(String hash, String password) {
+      if (this.argon2 == null) {
+        this.argon2 = Argon2Factory.create();
+      }
+
+      return this.argon2.verify(hash, password.getBytes(StandardCharsets.UTF_8));
+    }
+  }
 }