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feat(kernel/driver): implement driver sha512 verification

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Signed-off-by: EnderIce2 <enderice2@protonmail.com>
This commit is contained in:
EnderIce2 2025-03-21 03:23:25 +00:00
parent ae7f39d0de
commit 79e55140e3
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2 changed files with 43 additions and 1 deletions
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43
Kernel/core/driver/driver.cpp
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@ -26,14 +26,48 @@
#include <exec.hpp>
#include <rand.hpp>
#include <cwalk.h>
#include <sha512.h>
#include <md5.h>
#include "../../kernel.h"
using namespace vfs;
extern const char *trusted_drivers[];
extern const __SIZE_TYPE__ trusted_drivers_count;
namespace Driver
{
bool Manager::IsDriverTrusted(FileNode *File)
{
kstat st;
File->Stat(&st);
std::unique_ptr<uint8_t[]> ptr(new uint8_t[st.Size]);
File->Read(ptr.get(), st.Size, 0);
uint8_t *sha = sha512_sum(ptr.get(), st.Size);
char hash_str[129];
for (int j = 0; j < 64; j++)
sprintf(hash_str + j * 2, "%02x", sha[j]);
hash_str[128] = '\0';
for (__SIZE_TYPE__ i = 0; i < trusted_drivers_count; i++)
{
if (strcmp(hash_str, trusted_drivers[i]) == 0)
{
kfree(sha);
return true;
}
else
{
trace("Expected \"%s\" but got \"%s\" for driver %s",
trusted_drivers[i], hash_str, File->GetName().c_str());
}
}
kfree(sha);
return false;
}
void Manager::PreloadDrivers()
{
debug("Initializing driver manager");
@ -87,7 +121,14 @@ namespace Driver
if (Execute::GetBinaryType(drvNode->Path) != Execute::BinTypeELF)
{
error("Driver %s is not an ELF binary", drvNode->Path.c_str());
error("Driver %s is not an ELF binary", drvNode->GetPath().c_str());
continue;
}
if (!IsDriverTrusted(drvNode))
{
error("Driver %s is not trusted", drvNode->GetName().c_str());
KPrint("%s is not in the list of trusted drivers", drvNode->GetName().c_str());
continue;
}

1
Kernel/include/driver.hpp
View File

@ -122,6 +122,7 @@ namespace Driver
FileNode *devNode = nullptr;
FileNode *devInputNode = nullptr;
bool IsDriverTrusted(FileNode *File);
int LoadDriverFile(DriverObject &Drv, FileNode *File);
void ReloadDriver(dev_t driverID);