Add test_encrypt and test_hash php files to the app just for completion.

passman-dev/Caddyfile

@@ -0,0 +1,19 @@
+# HTTP site: redirect everything to HTTPS
+http://localhost {
+    redir https://{host}{uri} permanent
+}
+
+# HTTPS site
+https://localhost {
+    reverse_proxy web:80
+    tls internal
+
+    # Optional: security headers (defense-in-depth)
+    header {
+        X-Content-Type-Options "nosniff"
+        X-Frame-Options "DENY"
+        Referrer-Policy "no-referrer"
+    }
+}
+
+

passman-dev/db/init/01-create-pwd_mgr-db-withData.sql

@@ -22,6 +22,12 @@ CREATE TABLE IF NOT EXISTS `dummy` (
   `id` int(11) DEFAULT NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
+-- Create a dedicated DB user for the web application (least privilege).
+-- Grant only the required privileges on the application database.
+CREATE USER IF NOT EXISTS 'passman_app'@'%' IDENTIFIED BY 'passman_app_pw';
+GRANT SELECT, INSERT, UPDATE, DELETE ON pwd_mgr.* TO 'passman_app'@'%';
+FLUSH PRIVILEGES;
+
 CREATE TABLE IF NOT EXISTS `login_users` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `username` varchar(20) NOT NULL,
@@ -31,7 +37,7 @@ CREATE TABLE IF NOT EXISTS `login_users` (
 ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 INSERT INTO `login_users` (`id`, `username`, `password`) VALUES
-	(1, 'u1', 'p1');
+	(1, 'u1', '$2y$10$L18u5/PyVkDgsce/DsUOQu0sKhTzh854Euhog3cVb1W4YAfgRzY8W'); -- php -r 'echo password_hash("p1", PASSWORD_DEFAULT), PHP_EOL;'
 
 CREATE TABLE IF NOT EXISTS `notes` (
   `notesid` int(11) NOT NULL AUTO_INCREMENT,

passman-dev/docker-compose.yml

@@ -2,18 +2,30 @@
 services:
   web:
     build: .
-    ports:
-      - "80:80"
+    # ports:
+    #   - "80:80"
     volumes:
       - ./php:/var/www/html
     environment:
       DB_HOST: db
-      DB_USER: root
-      DB_PASS: rootpass
       DB_NAME: pwd_mgr
+      DB_USER: passman_app
+      DB_PASS: passman_app_pw
     depends_on:
       - db
 
+  proxy:
+    image: caddy:2
+    ports:
+      - "80:80"
+      - "443:443"
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile:ro
+      - caddy_data:/data
+      - caddy_config:/config
+    depends_on:
+      - web
+
   db:
     image: mariadb:11
     container_name: passman_db
@@ -30,4 +42,6 @@ services:
 
 volumes:
   dbdata:
+  caddy_data:
+  caddy_config:
 

passman-dev/php/passman/config.php

@@ -3,8 +3,8 @@
 // NOTE: In Docker, the DB host is the service name (e.g., "db"), not "localhost".
 
 $DB_HOST = getenv('DB_HOST') ?: 'db';
-$DB_USER = getenv('DB_USER') ?: 'root';
-$DB_PASS = getenv('DB_PASS') ?: 'rootpass';
+$DB_USER = getenv('DB_USER') ?: 'passman_app';
+$DB_PASS = getenv('DB_PASS') ?: 'passman_app_pw';
 $DB_NAME = getenv('DB_NAME') ?: 'pwd_mgr';
 
 // Create a DB connection.

passman-dev/php/passman/index.html

@@ -15,23 +15,23 @@
 	<br />
 	<ul>
 		<li>
-			<a href="http://localhost/passman/register.php">Registration Form</a>
+			<a href="/passman/register.php">Registration Form</a>
 		</li>
 		<br />
 		<li>
-			<a href="http://localhost/passman/login.php">Login Page</a>
+			<a href="/passman/login.php">Login Page</a>
 		</li>
 		<br />
 		<li>
-			<a href="http://localhost/passman/logout.php">Logout Page</a>
+			<a href="/passman/logout.php">Logout Page</a>
 		</li>
 		<br />
 		<li>
-			<a href="http://localhost/passman/dashboard.php">Dashboard</a> (display passwords for websites)
+			<a href="/passman/dashboard.php">Dashboard</a> (display passwords for websites)
 		</li>
 		<br />
 		<li>
-			<a href="http://localhost/passman/notes.php">Notes</a> (notes/comments/announcements)
+			<a href="/passman/notes.php">Notes</a> (notes/comments/announcements)
 		</li>
 		<br />
 	</ul>
@@ -41,18 +41,18 @@
 	<br />
 	<ul>
 		<li>
-			Test <a href="http://localhost/passman/test_hash.php">hashing</a> functions in PHP (server side)
+			Test <a href="/passman/test_hash.php">hashing</a> functions in PHP (server side)
 		</li>
 		<br />
 		<li>
-			Test <a href="http://localhost/passman/test_encrypt.php">encrypting/decrypting</a> functions in PHP (server side)
+			Test <a href="/passman/test_encrypt.php">encrypting/decrypting</a> functions in PHP (server side)
 		</li>
 		<br />
 	</ul>
 
 	<br />
 	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Hacker's side (for using stealing cookies using XSS):
-	<a href="http://localhost/passman/xss">http://localhost/passman/xss</a>
+	<a href="/passman/xss">passman/xss</a>
 	<br />
 
 </body>

passman-dev/php/passman/login.php

@@ -26,46 +26,51 @@ if ($_SERVER["REQUEST_METHOD"] === "POST") {
 		// }
 		require_once __DIR__ . "/config.php";
 
-		// SQL injection mitigation: use a prepared statement with bound parameters.
-		// User input is treated strictly as data, not as part of the SQL syntax.
-		$stmt = $conn->prepare("SELECT id FROM login_users WHERE username = ? AND password = ?");
-
+		// Authentication with hashed passwords:
+		// 1) Fetch the stored hash by username
+		// 		SQL injection mitigation: use a prepared statement with bound parameters.
+		// 		User input is treated strictly as data, not as part of the SQL syntax.
+		// 2) Verify the submitted password with password_verify()
+		$stmt = $conn->prepare("SELECT id, password FROM login_users WHERE username = ?");
 		if ($stmt === false) {
 			// Fail closed (do not leak details in production).
 			die("Prepare failed.");
 		}
 
-		$stmt->bind_param("ss", $username, $password);
+		$stmt->bind_param("s", $username);
 		$stmt->execute();
-		$stmt->store_result();   // Needed to use $stmt->num_rows
+
+		$result = $stmt->get_result();  // Requires mysqlnd (usually enabled)
 		unset($_POST['username']);
 		unset($_POST['password']);
 
-		if ($stmt->num_rows >= 1) {
-			// Regenerate session ID to prevent session fixation!
-			//session_regenerate_id(true);
+		if ($result && $result->num_rows === 1) {
+			$row = $result->fetch_assoc();
+			$stored_hash = $row["password"];
 
-			// Successfully logged in
-			$_SESSION['username'] = $username;
-			$_SESSION['loggedin'] = true;
+			// Verify password against the stored hash.
+			if (password_verify($password, $stored_hash)) {
+				// Regenerate session ID to prevent session fixation!
+				//session_regenerate_id(true);
 
-			//while ($row = $result -> fetch_assoc()) {
-			//	print_r($row);
-			//	$_SESSION['user_id'] = $row['id'];
-			//}
+				// Successfully logged in
+				$_SESSION['username'] = $username;
+				$_SESSION['loggedin'] = true;
 
-			// Close
-			$stmt->close();
-			$conn -> close();
+				$stmt->close();
+				$conn->close();
 
-			// Redirect to a dashboard page
-			header("Location: dashboard.php");
-			exit;
+				header("Location: dashboard.php");
+				exit;
+			} else {
+				$login_message = "Invalid username or password";
+			}
 		} else {
 			$login_message = "Invalid username or password";
 		}
+
 		$stmt->close();
-		$conn -> close();
+		$conn->close();
 	}
 }
 ?>

passman-dev/php/passman/register.php

@@ -37,8 +37,17 @@ if ($_SERVER["REQUEST_METHOD"] === "POST") {
 			$login_message = "Database error (prepare failed).";
 			$result = false;
 		} else {
-			$stmt->bind_param("ss", $new_username, $new_password);
-			$result = $stmt->execute();
+			// Hash the password before storing it.
+			// Never store login passwords in plaintext.
+			$password_hash = password_hash($new_password, PASSWORD_DEFAULT);
+			if ($password_hash === false) {
+				$login_message = "Password hashing failed.";
+				$result = false;
+			} else {
+				// Store the hash (not the plaintext password).
+				$stmt->bind_param("ss", $new_username, $password_hash);
+				$result = $stmt->execute();
+			}
 			$stmt->close();
 		}
 

passman-dev/php/passman/test_encrypt.php

@@ -0,0 +1,84 @@
+<?php
+// Simple example of encrypting/decrypting data using a password
+
+function getPasswordHash_Bin($username, $password) {
+    $salt = hash('sha256', $username, true);	// Compute salt as the hash of the username (parameter 'true' computes hash in bin format, default is hex)
+    $saltedPwd = $salt . $password;				// Get a salted password by combining salt and password
+    $hashedPwd = hash('sha256', $saltedPwd, true);	// Hash the salted password using SHA-256
+    // Return the password hash and the salt
+    return [
+        'hash' => $hashedPwd,
+        'salt' => $salt
+    ];
+}
+
+function deriveEncryptionKey($username, $password) {
+    // Compute binary hash of salted-password (and salt) from username and password
+    $pwdHash = getPasswordHash_Bin($username, $password);
+
+    // Derive a secure key using PBKDF2
+    $iterations = 100000; // Number of iterations for PBKDF2
+    $keyLength = 32; // Key length = 32 bytes for AES-256
+    $key = hash_pbkdf2('sha256', $pwdHash['hash'], $pwdHash['salt'], $iterations, $keyLength, true); // Parameter 'true' computes hash_pbkdf2 in bin
+    return $key;
+}
+
+// Encrypt data using AES-256-GCM
+function encryptData($data, $key) {
+    $nonce = random_bytes(12); // 12 bytes for AES-GCM nonce
+    $cipher = "aes-256-gcm";
+
+    // Encrypt the data
+    $ciphertext = openssl_encrypt($data, $cipher, $key, OPENSSL_RAW_DATA, $nonce, $tag);
+
+    //echo "nonce: " . bin2hex($nonce) . "<br>";;
+    //echo "tag: " . bin2hex($tag) . "<br>";;
+
+    // Concatenate nonce, tag, and ciphertext for storage
+    $result = $nonce . $tag . $ciphertext;
+    return base64_encode($result); // Encode to make it suitable for storage or transmission
+}
+
+// Decrypt data using AES-256-GCM, extracting nonce, tag, and ciphertext from the concatenated string
+function decryptData($encryptedData, $key) {
+    $cipher = "aes-256-gcm";
+
+    // Decode the base64-encoded data
+    $encryptedData = base64_decode($encryptedData);
+
+    // Extract nonce (12 bytes), tag (16 bytes), and ciphertext
+    $nonce = substr($encryptedData, 0, 12);
+    $tag = substr($encryptedData, 12, 16);
+    $ciphertext = substr($encryptedData, 28);
+
+    // Decrypt the data
+    $decryptedData = openssl_decrypt($ciphertext, $cipher, $key, OPENSSL_RAW_DATA, $nonce, $tag);
+
+    return $decryptedData;
+}
+
+
+// Example Usage
+$username = "user123";
+$password = "securepassword";
+$dataToEncrypt = "Sensitive Data";
+
+// Derive a symmetric encryption/dec key by hashing the password (and username as the salt) using PBKDF2 algorithm
+$encryptionKey = deriveEncryptionKey($username, $password);
+
+// Encrypt the data
+$encrypted = encryptData($dataToEncrypt, $encryptionKey);
+
+// Decrypt the data
+$decrypted = decryptData($encrypted, $encryptionKey);
+
+// Display results
+echo "Original Data: $dataToEncrypt<br>";
+//echo "Encryption Key (in bin): " . $encryptionKey . "<br>";
+//echo "Encryption Key (in hex): " . bin2hex($encryptionKey) . "<br>";
+echo "Encrypted Data (in base64): " . $encrypted . "<br>";
+//echo "Encrypted Data (in bin): " . base64_decode($encrypted) . "<br>";
+//echo "Encrypted Data (in hex): " . bin2hex(base64_decode($encrypted)) . "<br>";
+echo "Decrypted Data: $decrypted<br>";
+
+?>

passman-dev/php/passman/test_hash.php

@@ -0,0 +1,46 @@
+<?php
+// Simple example of hashing password
+
+$username = "user123";
+$password = "securepassword";
+
+// Compute salt as the hash of the username
+$salt = hash('sha256', $username);
+
+// Get a salted password by combining salt and password
+$saltedPwd = $salt . $password;
+
+// Hash the salted password using SHA-256
+$hashedPwd = hash('sha256', $saltedPwd);
+
+// Display variables
+echo "Username: $username<br>";
+echo "Password: $password<br>";
+
+echo "Salt (computed as the username's hash): $salt<br>";
+echo "Salted password: $saltedPwd<br>";
+echo "Hash of salted password: $hashedPwd<br>";
+echo "<p>";
+
+
+// Same as above but using a function
+
+function getPasswordHash_Hex($username, $password) {
+    // Compute hash of salted-password (and salt) from username and password (in hex format)
+    $salt = hash('sha256', $username);	// Compute salt as the hash of the username
+    $saltedPwd = $salt . $password;		// Get a salted password by combining salt and password
+    $hashedPwd = hash('sha256', $saltedPwd);	// Hash the salted password using SHA-256
+    // Return the password hash and the salt
+    return [
+        'hash' => $hashedPwd,
+        'salt' => $salt
+    ];
+}
+
+// Example usage of function getPasswordHash
+$getHasedPwd = getPasswordHash_Hex($username, $password);
+// Display results
+echo "Salt (in hex) computed using function getPasswordHash_Hex: " . $getHasedPwd['salt'] . "<br>";
+echo "Hash (in hex) computed using function getPasswordHash_Hex: " . $getHasedPwd['hash'] . "<br>";
+
+?>