From 0a4721e91e020cbbe9d534c410133f9d51b29457 Mon Sep 17 00:00:00 2001
From: Robin Strand Prestmo <robinsp@stud.ntnu.no>
Date: Tue, 3 Mar 2026 16:49:27 +0100
Subject: [PATCH] Added getHashPassword to PasswordHasher

---
 .../helpmehelpapplication.iml                 |  6 +++
 .../team6/models/PasswordHasher.java          | 52 +++++++++++++++++++
 .../sytemutvikling/team6/models/User.java     |  6 +--
 3 files changed, 61 insertions(+), 3 deletions(-)
 create mode 100644 helpmehelpapplication/helpmehelpapplication.iml
 create mode 100644 helpmehelpapplication/src/main/java/ntnu/sytemutvikling/team6/models/PasswordHasher.java

diff --git a/helpmehelpapplication/helpmehelpapplication.iml b/helpmehelpapplication/helpmehelpapplication.iml
new file mode 100644
index 0000000..9e3449c
--- /dev/null
+++ b/helpmehelpapplication/helpmehelpapplication.iml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="CheckStyle-IDEA-Module" serialisationVersion="2">
+    <option name="activeLocationsIds" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/helpmehelpapplication/src/main/java/ntnu/sytemutvikling/team6/models/PasswordHasher.java b/helpmehelpapplication/src/main/java/ntnu/sytemutvikling/team6/models/PasswordHasher.java
new file mode 100644
index 0000000..8c2c7ce
--- /dev/null
+++ b/helpmehelpapplication/src/main/java/ntnu/sytemutvikling/team6/models/PasswordHasher.java
@@ -0,0 +1,52 @@
+package ntnu.sytemutvikling.team6.models;
+
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.interfaces.PBEKey;
+import javax.crypto.spec.PBEKeySpec;
+import java.security.SecureRandom;
+import java.util.Base64;
+
+/**
+ * A password hasher
+ *
+ * <p>
+ *   Description
+ * <p/>
+ *
+ * @author Robin Strand Prestmo
+ */
+public final class PasswordHasher {
+  private static final SecureRandom RNG = new SecureRandom();
+
+  /**
+   * Get the hash of the password
+   *
+   * @param password a string password
+   * @return a hash secured password
+   */
+  public String getHashPassword(String password) {
+    String hasPass = "";
+
+    try {
+      // 1. Create salt
+      byte[] salt = new byte[16];
+      RNG.nextBytes(salt);
+
+      // 2. Create PBKDF2 Hash value
+      PBEKeySpec spec = new PBEKeySpec(password.toCharArray(), salt, 100000, 32*8);
+      SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
+      byte[] hash = factory.generateSecret(spec).getEncoded();
+
+      // 3. Combine salt and password bytes
+      byte[] hashBytes = new byte[48];
+      System.arraycopy(salt, 0, hashBytes, 0, 16);
+      System.arraycopy(hash, 0, hashBytes, 16, 32);
+
+      //4. Turn the combined salt+hash into a string.
+      hasPass = Base64.getEncoder().encodeToString(hashBytes);
+    } catch (Exception e) {
+      throw new RuntimeException("Error while hasing password.", e);
+    }
+    return hasPass;
+  }
+}
diff --git a/helpmehelpapplication/src/main/java/ntnu/sytemutvikling/team6/models/User.java b/helpmehelpapplication/src/main/java/ntnu/sytemutvikling/team6/models/User.java
index 283bfa1..afa414a 100644
--- a/helpmehelpapplication/src/main/java/ntnu/sytemutvikling/team6/models/User.java
+++ b/helpmehelpapplication/src/main/java/ntnu/sytemutvikling/team6/models/User.java
@@ -2,9 +2,9 @@
 
 import java.util.UUID;
 
-// Passord må hashes!!!
-// Unntakshåndtering mangler
-// Enhetstesting mangler
+// TODO: Passord må hashes!!!
+// TODO: Unntakshåndtering mangler
+// TODO: Enhetstesting mangler
 
 /**
  * Represents a user.