Split projects.

2 files changed, 77 insertions, 0 deletions

diff --git a/src/main/java/net/elytrium/limboauth/migration/MigrationHash.java b/src/main/java/net/elytrium/limboauth/migration/MigrationHash.java
new file mode 100644
index 0000000..5296534
--- /dev/null
+++ b/src/main/java/net/elytrium/limboauth/migration/MigrationHash.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2021 Elytrium
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.elytrium.limboauth.migration;
+
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+public enum MigrationHash {
+
+  @SuppressWarnings("unused")
+  AUTHME((hash, password) -> {
+    String[] arr = hash.split("\\$"); // $SHA$salt$hash
+    return arr.length == 4 && arr[3].equals(MigrationHash.getSHA256(MigrationHash.getSHA256(password) + arr[2]));
+  });
+
+  final MigrationHashVerifier verifier;
+
+  MigrationHash(MigrationHashVerifier verifier) {
+    this.verifier = verifier;
+  }
+
+  public boolean checkPassword(String hash, String password) {
+    return this.verifier.checkPassword(hash, password);
+  }
+
+  private static String getSHA256(String string) {
+    try {
+      MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");
+      messageDigest.reset();
+      messageDigest.update(string.getBytes(StandardCharsets.UTF_8));
+      byte[] array = messageDigest.digest();
+      return String.format("%0" + (array.length << 1) + "x", new BigInteger(1, array));
+    } catch (NoSuchAlgorithmException e) {
+      throw new IllegalArgumentException(e);
+    }
+  }
+}
diff --git a/src/main/java/net/elytrium/limboauth/migration/MigrationHashVerifier.java b/src/main/java/net/elytrium/limboauth/migration/MigrationHashVerifier.java
new file mode 100644
index 0000000..cbe5135
--- /dev/null
+++ b/src/main/java/net/elytrium/limboauth/migration/MigrationHashVerifier.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2021 Elytrium
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.elytrium.limboauth.migration;
+
+public interface MigrationHashVerifier {
+
+  boolean checkPassword(String hash, String password);
+}