99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
#include <Windows.h>
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#include "../hooks/files.h"
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BOOL FileExists(wchar_t* szPath) {
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DWORD dwAttrib = GetFileAttributesW(szPath);
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return (dwAttrib != INVALID_FILE_ATTRIBUTES && !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
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}
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typedef struct _handle_list {
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HANDLE m_Handle;
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PVOID m_pData;
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DWORD m_Type;
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BOOL m_IsOnHeap;
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struct _handle_list* m_Next;
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} handle_list_t;
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handle_list_t handle_list_root = {
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.m_Handle = INVALID_HANDLE_VALUE,
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.m_pData = NULL,
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.m_Type = 0xffffffff,
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.m_IsOnHeap = FALSE,
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.m_Next = NULL,
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};
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PVOID GetDataForHandle(HANDLE hObject, DWORD type) {
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if (hObject == INVALID_HANDLE_VALUE) return NULL;
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handle_list_t* head = &handle_list_root;
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while (head) {
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if (head->m_Handle == hObject && (type == HDATA_ANY || head->m_Type == type))
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return head->m_pData;
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head = head->m_Next;
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}
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return NULL;
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}
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void SetDataForHandle(HANDLE hObject, DWORD type, PVOID pData, BOOL isHeap) {
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if (hObject == INVALID_HANDLE_VALUE) return;
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handle_list_t* head = &handle_list_root;
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while (1) {
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if (head->m_Handle == hObject && (type == HDATA_ANY || head->m_Type == type)) {
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if (head->m_IsOnHeap) free(head->m_pData);
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head->m_pData = pData;
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head->m_IsOnHeap = isHeap;
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return;
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}
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if (head->m_Next == NULL) break;
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head = head->m_Next;
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}
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head->m_Next = malloc(sizeof *head);
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head->m_Next->m_Handle = hObject;
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head->m_Next->m_pData = pData;
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head->m_Next->m_Next = NULL;
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head->m_Next->m_IsOnHeap = isHeap;
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head->m_Next->m_Type = type;
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}
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BOOL RemoveDataForHandle(HANDLE hObject, DWORD type) {
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if (hObject == INVALID_HANDLE_VALUE) return FALSE;
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handle_list_t* head = &handle_list_root;
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handle_list_t* previous = &handle_list_root;
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BOOL ret = FALSE;
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while (head) {
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if (head->m_Handle == hObject && (type == HDATA_ANY || head->m_Type == type)) {
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previous->m_Next = head->m_Next;
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if (head->m_IsOnHeap) free(head->m_pData);
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handle_list_t* next = head->m_Next;
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free(head);
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head = next;
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if (type != HDATA_ANY) return TRUE;
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ret = TRUE;
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} else {
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previous = head;
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head = head->m_Next;
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}
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}
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return ret;
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}
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HANDLE GetDummyHandle() {
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CHAR path[MAX_PATH];
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GetModuleFileNameA(NULL, path, MAX_PATH);
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HANDLE hObject =
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_CreateFileA(path, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
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if (hObject == INVALID_HANDLE_VALUE) {
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log_error(HOOKS_LOGGER, "Failed to create dummy handle: %03x", GetLastError());
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}
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return hObject;
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}
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void BytesToHex(char* hex_buffer, BYTE* bytes, DWORD nbytes) {
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for (size_t i = 0; i < nbytes; i++) {
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sprintf(hex_buffer + i * 3, "%02x ", bytes[i]);
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}
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hex_buffer[nbytes * 3] = '\0';
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}
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