IMP: :boom: Breaking changes some checks are needed to be done.

Signed-off-by: Amlal <amlalelmahrouss@icloud.com>

1 files changed, 178 insertions, 0 deletions

diff --git a/dev/Kernel/src/User.cc b/dev/Kernel/src/User.cc
new file mode 100644
index 00000000..601eee15
--- /dev/null
+++ b/dev/Kernel/src/User.cc
@@ -0,0 +1,178 @@
+/*
+ *	========================================================
+ *
+ *  	ZKA
+ * 	Copyright (C) 2024, TQ B.V, all rights reserved., all rights reserved.
+ *
+ *	File: User.cc
+ * 	Purpose: User class, used to provide authentication and security.
+ *
+ * 	========================================================
+ */
+
+#include <KernelKit/User.h>
+#include <KernelKit/LPC.h>
+#include <NewKit/Stop.h>
+#include <KernelKit/FileMgr.h>
+#include <KernelKit/UserProcessScheduler.h>
+#include <KernelKit/Heap.h>
+
+#define kStdUserType   (0xCE)
+#define kSuperUserType (0xEC)
+
+/// @file User.cc
+/// @brief User support (or also called )
+
+namespace Kernel
+{
+	namespace Detail
+	{
+		/// \brief Constructs a password by hashing the password.
+		/// \param password password to hash.
+		/// \return the hashed password
+		const Int32 cred_construct_token(Char* password, const Char* in_password, User* user, SizeT length)
+		{
+			if (!password || !user)
+				return 1;
+
+			kcout << "cred_construct_token: Hashing user password...\r";
+
+			for (Size i_pass = 0; i_pass < length; ++i_pass)
+			{
+				const Char& cur_chr = in_password[i_pass];
+
+				if (cur_chr == 0)
+					break;
+
+				password[i_pass] = cur_chr | (user->IsStdUser() ? kStdUserType : kSuperUserType);
+			}
+
+			kcout << "cred_construct_token: Hashed user password.\r";
+
+			return 0;
+		}
+	} // namespace Detail
+
+	/// @brief User ring constructor.
+	User::User(const Int32& sel, const Char* userName)
+		: mUserRing((UserRingKind)sel)
+	{
+		MUST_PASS(sel >= 0);
+		rt_copy_memory((VoidPtr)userName, this->mUserName, rt_string_len(userName));
+	}
+
+	/// @brief User ring constructor.
+	User::User(const UserRingKind& ringKind, const Char* userName)
+		: mUserRing(ringKind)
+	{
+		rt_copy_memory((VoidPtr)userName, this->mUserName, rt_string_len(userName));
+	}
+
+	/// @brief User destructor class.
+	User::~User() = default;
+
+	Bool User::Save(const usr_public_key_kind password_to_fill) noexcept
+	{
+		if (!password_to_fill ||
+			*password_to_fill == 0)
+			return No;
+
+		SizeT len = rt_string_len(password_to_fill);
+
+		Char* password = new Char[len];
+		MUST_PASS(password);
+
+		// fill data first, generate hash.
+		// return false on error.
+
+		rt_copy_memory((VoidPtr)password_to_fill, password, len);
+
+		if (!Detail::cred_construct_token(password, password_to_fill, this, len))
+		{
+			delete[] password;
+			password = nullptr;
+
+			return No;
+		}
+
+		// then store password.
+
+		rt_copy_memory(password, this->mUserToken, rt_string_len(password_to_fill));
+
+		delete[] password;
+		password = nullptr;
+
+		kcout << "User::Save: Saved password successfully...\r";
+
+		return Yes;
+	}
+
+	Bool User::Matches(const usr_public_key_kind password_to_fill) noexcept
+	{
+		if (!password_to_fill ||
+			*password_to_fill)
+			return No;
+
+		SizeT len = rt_string_len(password_to_fill);
+
+		Char* password = new Char[len];
+		MUST_PASS(password);
+
+		// fill data first, generate hash.
+		// return false on error.
+
+		rt_copy_memory((VoidPtr)password_to_fill, password, len);
+
+		if (!Detail::cred_construct_token(password, password_to_fill, this, len))
+		{
+			delete[] password;
+			password = nullptr;
+
+			return No;
+		}
+
+		kcout << "User::Matches: Validating hashed passwords...\r";
+
+		// now check if the password matches.
+		if (rt_string_cmp(password, this->mUserToken, rt_string_len(this->mUserToken)) == 0)
+		{
+			kcout << "User::Matches: Password is valid.\r";
+			return Yes;
+		}
+
+		kcout << "User::Matches: Password isn't valid.\r";
+		return No;
+	}
+
+	Bool User::operator==(const User& lhs)
+	{
+		return lhs.mUserRing == this->mUserRing;
+	}
+
+	Bool User::operator!=(const User& lhs)
+	{
+		return lhs.mUserRing != this->mUserRing;
+	}
+
+	Char* User::Name() noexcept
+	{
+		return this->mUserName;
+	}
+
+	/// @brief Returns the user's ring.
+	/// @return The king of ring the user is attached to.
+	const UserRingKind& User::Ring() noexcept
+	{
+		return this->mUserRing;
+	}
+
+	Bool User::IsStdUser() noexcept
+	{
+		return this->Ring() == UserRingKind::kRingStdUser;
+	}
+
+	Bool User::IsSuperUser() noexcept
+	{
+		return this->Ring() == UserRingKind::kRingSuperUser;
+	}
+} // namespace Kernel