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/*
* ========================================================
*
* Kernel
* Copyright ZKA Technologies., all rights reserved.
*
* File: User.cxx
* Purpose: User concept and management.
*
* ========================================================
*/
#include <KernelKit/User.hxx>
#include <NewKit/KernelCheck.hxx>
#include <KernelKit/FileManager.hxx>
#include <KernelKit/ProcessScheduler.hxx>
#include <KernelKit/Heap.hxx>
#define cStdUser (0xCF)
#define cSuperUser (0xEF)
/// BUGS: 0
namespace Kernel
{
namespace Detail
{
/// \brief Constructs a token by hashing the password.
/// \param password password to hash.
/// \return the hashed password
const Int32 cred_construct_token(Char* password, User* user)
{
if (!password || !user)
return -1;
for (Size i_pass = 0; i_pass < rt_string_len(password); ++i_pass)
{
Char cur_chr = password[i_pass];
password[i_pass] = cur_chr + (user->IsStdUser() ? cStdUser : cSuperUser);
}
return 0;
}
} // namespace Detail
User::User(const Int32& sel, const Char* userName)
: fRing((RingKind)sel)
{
MUST_PASS(sel >= 0);
this->fUserName += userName;
}
User::User(const RingKind& ringKind, const Char* userName)
: fRing(ringKind)
{
this->fUserName += userName;
}
User::~User() = default;
Bool User::TrySave(const Char* password) noexcept
{
kcout << "Trying to save password...\r";
SizeT len = rt_string_len(password);
Char* token = new Char[len];
MUST_PASS(token);
rt_copy_memory((VoidPtr)password, token, rt_string_len(password));
Detail::cred_construct_token(token, this);
if (NewFilesystemManager::GetMounted())
{
auto node = NewFilesystemManager::GetMounted()->Open(kUsersFile, "wb");
if (!node)
{
NewFilesystemManager::GetMounted()->Create(kUsersFile);
}
if (node)
{
NewFilesystemManager::GetMounted()->Write(this->fUserName.CData(), node, (VoidPtr)token, (this->IsStdUser() ? cStdUser : cSuperUser) | kNewFSCatalogKindMetaFile, len);
delete node;
}
delete token;
return true;
}
delete token;
return false;
}
bool User::operator==(const User& lhs)
{
return lhs.fRing == this->fRing;
}
bool User::operator!=(const User& lhs)
{
return lhs.fRing != this->fRing;
}
StringView& User::Name() noexcept
{
return this->fUserName;
}
const RingKind& User::Ring() noexcept
{
return this->fRing;
}
Bool User::IsStdUser() noexcept
{
return this->Ring() == RingKind::kRingStdUser;
}
Bool User::IsSuperUser() noexcept
{
return this->Ring() == RingKind::kRingSuperUser;
}
UserManager* UserManager::The() noexcept
{
UserManager* view = nullptr;
if (!view)
view = new UserManager();
return view;
}
Bool UserManager::TryLogIn(User* user, const Char* password) noexcept
{
if (!password ||
!user)
{
ErrLocal() = kErrorInvalidData;
kcout << "newoskrnl: Incorrect data given.\r";
return false;
}
kcout << "newoskrnl: Trying to log-in.\r";
FileStreamUTF8 file(kUsersFile, "rb");
// ------------------------------------------ //
// Retrieve token from a specific file fork.
// ------------------------------------------ //
auto token = file.Read(user->fUserName.CData());
if (!token)
{
ErrLocal() = kErrorInvalidCreds;
kcout << "newoskrnl: Incorrect credentials.\r";
return false;
}
else
{
Char generated_token[255] = {0};
// ================================================== //
// Provide password on token variable.
// ================================================== //
rt_copy_memory((VoidPtr)password, generated_token, rt_string_len(password));
// ================================================== //
// Construct token.
// ================================================== //
Detail::cred_construct_token(generated_token, user);
// ================================================== //
// Checks if it matches the current token we have.
// ================================================== //
if (rt_string_cmp((Char*)token, generated_token, rt_string_len(password)))
{
kcout << "newoskrnl: Incorrect credentials.\r";
mm_delete_ke_heap(token);
return false;
}
kcout << "newoskrnl: Credentials are correct, moving on.\r";
}
// ------------------------------------------ //
// This was successful, continue.
// ------------------------------------------ //
user->fUserToken = token;
if (fCurrentUser)
{
if (!fLastLoggedOffUser)
{
fLastLoggedOffUser = fCurrentUser;
}
else
{
this->TryLogOff();
}
}
fCurrentUser = user;
Kernel::kcout << "newoskrnl: Logged in as: " << fCurrentUser->Name().CData() << Kernel::endl;
return true;
}
User* UserManager::GetCurrent() noexcept
{
return fCurrentUser;
}
Void UserManager::TryLogOff() noexcept
{
if (!fCurrentUser)
return;
// an illegal operation just occured, we can't risk more.
if (fCurrentUser == fRootUser)
{
ke_stop(RUNTIME_CHECK_BOOTSTRAP);
}
if (fLastLoggedOffUser)
delete fLastLoggedOffUser;
fLastLoggedOffUser = nullptr;
fLastLoggedOffUser = fCurrentUser;
}
} // namespace Kernel
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