1 files changed, 122 insertions, 0 deletions
diff --git a/src/kernel/src/UserMgr+User.cpp b/src/kernel/src/UserMgr+User.cpp
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+++ b/src/kernel/src/UserMgr+User.cpp
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+// Copyright 2024-2026, Amlal El Mahrouss (amlal@nekernel.org)
+// Licensed under the Apache License, Version 2.0 (see LICENSE file)
+// Official repository: https://github.com/nekernel-org/nekernel
+
+#include <KernelKit/FileMgr.h>
+#include <KernelKit/HeapMgr.h>
+#include <KernelKit/KPC.h>
+#include <KernelKit/ThreadLocalStorage.h>
+#include <KernelKit/UserMgr+User.h>
+#include <NeKit/KString.h>
+#include <NeKit/KernelPanic.h>
+#include <NeKit/Utils.h>
+
+/// @file UserMgr.cc
+/// @brief Multi-user support.
+
+namespace Kernel {
+
+namespace Detail {
+  ////////////////////////////////////////////////////////////
+  /// \brief Constructs a password by hashing the password.
+  /// \param password password to hash.
+  /// \return the hashed password
+  ////////////////////////////////////////////////////////////
+  STATIC UInt64 user_fnv_generator(const Char* password, User* user) {
+    kout << "user_fnv_generator: Try hashing user password...\r";
+
+    if (!password || !user) return 0;
+    if (*password == 0) return 0;
+
+    const UInt64 kFnvOffsetBasis = 0xcbf29ce484222325ULL;
+    const UInt64 kFnvPrime       = 0x100000001b3ULL;
+
+    UInt64 hash = kFnvOffsetBasis;
+
+    while (*password) {
+      hash ^= (Char) (*password++);
+      hash *= kFnvPrime;
+    }
+
+    kout << "user_fnv_generator: Hashed user password.\r";
+
+    return hash;
+  }
+}  // namespace Detail
+
+////////////////////////////////////////////////////////////
+/// @brief User ring constructor.
+////////////////////////////////////////////////////////////
+User::User(const Int32& sel, const Char* user_name) : mUserRing((UserRingKind) sel) {
+  MUST_PASS(sel >= 0);
+  rt_copy_memory_safe((VoidPtr) user_name, this->mUserName, rt_string_len(user_name),
+                      kMaxUserNameLen);
+}
+
+////////////////////////////////////////////////////////////
+/// @brief User ring constructor.
+////////////////////////////////////////////////////////////
+User::User(const UserRingKind& ring_kind, const Char* user_name) : mUserRing(ring_kind) {
+  rt_copy_memory_safe((VoidPtr) user_name, this->mUserName, rt_string_len(user_name),
+                      kMaxUserNameLen);
+}
+
+////////////////////////////////////////////////////////////
+/// @brief User destructor class.
+////////////////////////////////////////////////////////////
+User::~User() = default;
+
+Bool User::Save(const UserPublicKey password) {
+  if (!password || *password == 0) return No;
+
+  this->mUserFNV = Detail::user_fnv_generator(password, this);
+
+  kout << "User::Save: Saved password successfully...\r";
+
+  return Yes;
+}
+
+Bool User::Login(const UserPublicKey password) {
+  if (!password || !*password) return No;
+
+  auto ret = this->mUserFNV == Detail::user_fnv_generator(password, this);
+
+  // now check if the password matches.
+  kout << (ret ? "User::Login: Password matches.\r" : "User::Login: Password doesn't match.\r");
+  return ret;
+}
+
+Bool User::operator==(const User& lhs) {
+  return lhs.mUserRing == this->mUserRing;
+}
+
+Bool User::operator!=(const User& lhs) {
+  return lhs.mUserRing != this->mUserRing;
+}
+
+////////////////////////////////////////////////////////////
+/// @brief Returns the user's name.
+////////////////////////////////////////////////////////////
+
+Char* User::Name() {
+  return this->mUserName;
+}
+
+////////////////////////////////////////////////////////////
+/// @brief Returns the user's ring.
+/// @return The king of ring the user is attached to.
+////////////////////////////////////////////////////////////
+
+const UserRingKind& User::Ring() {
+  return this->mUserRing;
+}
+
+Bool User::IsStdUser() {
+  return this->Ring() == UserRingKind::kRingStdUser;
+}
+
+Bool User::IsSuperUser() {
+  return this->Ring() == UserRingKind::kRingSuperUser;
+}
+
+}  // namespace Kernel