Implement some login features.

See https://github.com/TeamPiped/Piped/issues/349

build.gradle

@@ -36,6 +36,7 @@ dependencies {
     implementation 'org.hibernate:hibernate-hikaricp:5.6.1.Final'
     implementation 'com.zaxxer:HikariCP:5.0.0'
     implementation 'org.springframework.security:spring-security-crypto:5.6.0'
+    implementation 'dev.samstevens.totp:totp:1.7.1'
     implementation 'commons-logging:commons-logging:1.2'
 }
 

src/main/java/me/kavin/piped/ServerLauncher.java

@@ -212,7 +212,8 @@ public class ServerLauncher extends MultithreadedHttpServerLauncher {
                     try {
                         LoginRequest body = Constants.mapper.readValue(request.loadBody().getResult().asArray(),
                                 LoginRequest.class);
-                        return getJsonResponse(ResponseHelper.loginResponse(body.username, body.password), "private");
+                        return getJsonResponse(ResponseHelper.loginResponse(body.username, body.password, body.totp),
+                                "private");
                     } catch (Exception e) {
                         return getErrorResponse(e, request.getPath());
                     }

src/main/java/me/kavin/piped/utils/ResponseHelper.java

@@ -21,6 +21,7 @@ import java.util.Collections;
 import java.util.Date;
 import java.util.List;
 import java.util.Map;
+import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
@@ -69,6 +70,12 @@ import com.rometools.rome.feed.synd.SyndPersonImpl;
 import com.rometools.rome.io.FeedException;
 import com.rometools.rome.io.SyndFeedOutput;
 
+import dev.samstevens.totp.code.CodeGenerator;
+import dev.samstevens.totp.code.CodeVerifier;
+import dev.samstevens.totp.code.DefaultCodeGenerator;
+import dev.samstevens.totp.code.DefaultCodeVerifier;
+import dev.samstevens.totp.time.SystemTimeProvider;
+import dev.samstevens.totp.time.TimeProvider;
 import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import it.unimi.dsi.fastutil.objects.ObjectArrayList;
 import me.kavin.piped.consts.Constants;
@@ -97,6 +104,7 @@ import me.kavin.piped.utils.resp.AuthenticationFailureResponse;
 import me.kavin.piped.utils.resp.CompromisedPasswordResponse;
 import me.kavin.piped.utils.resp.DisabledRegistrationResponse;
 import me.kavin.piped.utils.resp.IncorrectCredentialsResponse;
+import me.kavin.piped.utils.resp.InvalidOldPasswordResponse;
 import me.kavin.piped.utils.resp.InvalidRequestResponse;
 import me.kavin.piped.utils.resp.LoginResponse;
 import me.kavin.piped.utils.resp.SubscribeStatusResponse;
@@ -597,7 +605,11 @@ public class ResponseHelper {
 
     private static final BCryptPasswordEncoder bcryptPasswordEncoder = new BCryptPasswordEncoder();
 
-    public static final byte[] loginResponse(String user, String pass)
+    private static final TimeProvider timeProvider = new SystemTimeProvider();
+    private static final CodeGenerator codeGenerator = new DefaultCodeGenerator();
+    private static final CodeVerifier verifier = new DefaultCodeVerifier(codeGenerator, timeProvider);
+
+    public static final byte[] loginResponse(String user, String pass, String totp)
             throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
 
         if (user == null || pass == null)
@@ -616,14 +628,20 @@ public class ResponseHelper {
         if (dbuser != null) {
             String hash = dbuser.getPassword();
             if (hash.startsWith("$argon2")) {
-                if (argon2PasswordEncoder.matches(pass, hash)) {
+                if (!argon2PasswordEncoder.matches(pass, hash)) {
                     s.close();
-                    return Constants.mapper.writeValueAsBytes(new LoginResponse(dbuser.getSessionId()));
+                    return Constants.mapper.writeValueAsBytes(new IncorrectCredentialsResponse());
                 }
-            } else if (bcryptPasswordEncoder.matches(pass, hash)) {
+            } else if (!bcryptPasswordEncoder.matches(pass, hash)) {
                 s.close();
-                return Constants.mapper.writeValueAsBytes(new LoginResponse(dbuser.getSessionId()));
+                return Constants.mapper.writeValueAsBytes(new IncorrectCredentialsResponse());
             }
+
+            String totpSecret = dbuser.getTotp();
+            if (totpSecret != null && !verifier.isValidCode(totpSecret, totp))
+                return Constants.mapper.writeValueAsBytes(new IncorrectCredentialsResponse());
+
+            return Constants.mapper.writeValueAsBytes(new LoginResponse(dbuser.getSessionId()));
         }
 
         s.close();
@@ -632,6 +650,83 @@ public class ResponseHelper {
 
     }
 
+    public static final byte[] changePasswordResponse(String session, String oldpass, String newpass)
+            throws IOException, InterruptedException, URISyntaxException {
+
+        if (oldpass == null || newpass == null)
+            return Constants.mapper.writeValueAsBytes(new InvalidRequestResponse());
+
+        Session s = DatabaseSessionFactory.createSession();
+
+        User user = DatabaseHelper.getUserFromSession(s, session);
+
+        if (user != null) {
+            String hash = user.getPassword();
+            if (hash.startsWith("$argon2")) {
+                if (!argon2PasswordEncoder.matches(oldpass, hash)) {
+                    s.close();
+                    return Constants.mapper.writeValueAsBytes(new InvalidOldPasswordResponse());
+                }
+            } else if (!bcryptPasswordEncoder.matches(oldpass, hash)) {
+                s.close();
+                return Constants.mapper.writeValueAsBytes(new InvalidOldPasswordResponse());
+            }
+
+            if (Constants.COMPROMISED_PASSWORD_CHECK) {
+                String sha1Hash = DigestUtils.sha1Hex(newpass).toUpperCase();
+                String prefix = sha1Hash.substring(0, 5);
+                String suffix = sha1Hash.substring(5);
+                String[] entries = RequestUtils
+                        .sendGet("https://api.pwnedpasswords.com/range/" + prefix, "github.com/TeamPiped/Piped-Backend")
+                        .split("\n");
+                for (String entry : entries)
+                    if (StringUtils.substringBefore(entry, ":").equals(suffix))
+                        return Constants.mapper.writeValueAsBytes(new CompromisedPasswordResponse());
+            }
+
+            user.setPassword(argon2PasswordEncoder.encode(newpass));
+            s.saveOrUpdate(user);
+            s.getTransaction().begin();
+            s.getTransaction().commit();
+        }
+
+        s.close();
+
+        return Constants.mapper.writeValueAsBytes(new AuthenticationFailureResponse());
+    }
+
+    public static final byte[] authValidResponse(String session) throws JsonProcessingException {
+        Session s = DatabaseSessionFactory.createSession();
+
+        if (((Long) s.createQuery("SELECT COUNT(user) from User user where user.sessionId = :sessionId")
+                .setParameter("sessionId", session).uniqueResult()).intValue() > 0) {
+            s.close();
+            return Constants.mapper.writeValueAsBytes(new AcceptedResponse());
+        }
+
+        s.close();
+
+        return Constants.mapper.writeValueAsBytes(new AuthenticationFailureResponse());
+    }
+
+    public static final byte[] logoutResponse(String session) throws JsonProcessingException {
+        Session s = DatabaseSessionFactory.createSession();
+
+        s.getTransaction().begin();
+
+        if (s.createQuery("UPDATE User user SET user.sessionId = :newSessionId where user.sessionId = :sessionId")
+                .setParameter("sessionId", session).setParameter("newSessionId", String.valueOf(UUID.randomUUID()))
+                .executeUpdate() > 0) {
+            s.getTransaction().commit();
+            s.close();
+            return Constants.mapper.writeValueAsBytes(new AcceptedResponse());
+        }
+
+        s.close();
+
+        return Constants.mapper.writeValueAsBytes(new AuthenticationFailureResponse());
+    }
+
     public static final byte[] subscribeResponse(String session, String channelId)
             throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
 

src/main/java/me/kavin/piped/utils/obj/db/User.java

@@ -37,6 +37,9 @@ public class User implements Serializable {
     @Column(name = "session_id", length = 36)
     private String sessionId;
 
+    @Column(name = "totp_token", length = 32, insertable = false)
+    private String totp;
+
     @ElementCollection
     @CollectionTable(name = "users_subscribed", joinColumns = @JoinColumn(name = "subscriber"), indexes = {
             @Index(columnList = "subscriber", name = "users_subscribed_subscriber_idx"),
@@ -86,6 +89,14 @@ public class User implements Serializable {
         this.password = password;
     }
 
+    public String getTotp() {
+        return totp;
+    }
+
+    public void setTotp(String totp) {
+        this.totp = totp;
+    }
+
     public List<String> getSubscribed() {
         return subscribed_ids;
     }

src/main/java/me/kavin/piped/utils/resp/IncorrectCredentialsResponse.java

@@ -2,6 +2,6 @@ package me.kavin.piped.utils.resp;
 
 public class IncorrectCredentialsResponse {
 
-    public String error = "The username or password you have entered is incorrect.";
+    public String error = "Invalid credentials. Re-check your username, password and totp.";
 
 }

src/main/java/me/kavin/piped/utils/resp/InvalidOldPasswordResponse.java

@@ -0,0 +1,7 @@
+package me.kavin.piped.utils.resp;
+
+public class InvalidOldPasswordResponse {
+
+    public String error = "The old password you provided is incorrect.";
+
+}

src/main/java/me/kavin/piped/utils/resp/LoginRequest.java

@@ -2,6 +2,6 @@ package me.kavin.piped.utils.resp;
 
 public class LoginRequest {
 
-    public String username, password;
+    public String username, password, totp;
 
 }