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/* Chrysalide - Outil d'analyse de fichiers binaires
* pe-int.c - structures internes du format Portable Executable
*
* Copyright (C) 2010 Cyrille Bagard
*
* This file is part of Chrysalide.
*
* OpenIDA is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* OpenIDA is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pe-int.h"
#include <malloc.h>
#include <string.h>
#include "../../common/endianness.h"
/******************************************************************************
* *
* Paramètres : format = informations chargées à consulter. *
* pos = position de début de lecture. [OUT] *
* header = structure lue à retourner. [OUT] *
* *
* Description : Procède à la lecture d'une en-tête de programme DOS. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool read_dos_image_header(const GPeFormat *format, off_t *pos, image_dos_header *header)
{
bool result; /* Bilan à retourner */
const bin_t *content; /* Contenu binaire à lire */
off_t length; /* Taille totale du contenu */
size_t i; /* Boucle de parcours */
content = G_BIN_FORMAT(format)->content;
length = G_BIN_FORMAT(format)->length;
result = read_u16(&header->e_magic, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_cblp, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_cp, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_crlc, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_cparhdr, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_minalloc, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_maxalloc, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_ss, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_sp, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_csum, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_ip, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_cs, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_lfarlc, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_ovno, content, pos, length, SRE_LITTLE);
for (i = 0; i < 4 && result; i++)
result = read_u16(&header->e_res[i], content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_oemid, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->e_oeminfo, content, pos, length, SRE_LITTLE);
for (i = 0; i < 10 && result; i++)
result = read_u16(&header->e_res2[i], content, pos, length, SRE_LITTLE);
result &= read_u32(&header->e_lfanew, content, pos, length, SRE_LITTLE);
return result;
}
/******************************************************************************
* *
* Paramètres : format = informations chargées à consulter. *
* pos = position de début de lecture. [OUT] *
* header = structure lue à retourner. [OUT] *
* *
* Description : Procède à la lecture d'une en-tête de programme PE (1). *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool read_pe_file_header(const GPeFormat *format, off_t *pos, image_file_header *header)
{
bool result; /* Bilan à retourner */
const bin_t *content; /* Contenu binaire à lire */
off_t length; /* Taille totale du contenu */
content = G_BIN_FORMAT(format)->content;
length = G_BIN_FORMAT(format)->length;
result = read_u16(&header->machine, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->number_of_sections, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->time_date_stamp, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->pointer_to_symbol_table, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->number_of_symbols, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->size_of_optional_header, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->characteristics, content, pos, length, SRE_LITTLE);
return result;
}
/******************************************************************************
* *
* Paramètres : format = informations chargées à consulter. *
* pos = position de début de lecture. [OUT] *
* header = structure lue à retourner. [OUT] *
* *
* Description : Procède à la lecture d'une en-tête de programme PE (2). *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool read_pe_optional_header(const GPeFormat *format, off_t *pos, image_optional_header *header)
{
bool result; /* Bilan à retourner */
const bin_t *content; /* Contenu binaire à lire */
off_t length; /* Taille totale du contenu */
uint32_t i; /* Boucle de parcours */
content = G_BIN_FORMAT(format)->content;
length = G_BIN_FORMAT(format)->length;
result = read_u16(&header->magic, content, pos, length, SRE_LITTLE);
result &= read_u8(&header->major_linker_version, content, pos, length, SRE_LITTLE);
result &= read_u8(&header->minor_linker_version, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_code, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_initialized_data, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_uninitialized_data, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->address_of_entry_point, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->base_of_code, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->base_of_data, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->image_base, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->section_alignment, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->file_alignment, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->major_operating_system_version, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->minor_operating_system_version, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->major_image_version, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->minor_image_version, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->major_subsystem_version, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->minor_subsystem_version, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->win32_version_value, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_image, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_headers, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->checksum, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->subsystem, content, pos, length, SRE_LITTLE);
result &= read_u16(&header->dll_characteristics, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_stack_reserve, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_stack_commit, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_heap_reserve, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->size_of_heap_commit, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->loader_flags, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->number_of_rva_and_sizes, content, pos, length, SRE_LITTLE);
for (i = 0; i < header->number_of_rva_and_sizes && result; i++)
{
result = read_u32(&header->data_directory[i].virtual_address, content, pos, length, SRE_LITTLE);
result &= read_u32(&header->data_directory[i].size, content, pos, length, SRE_LITTLE);
}
return result;
}
/******************************************************************************
* *
* Paramètres : format = informations chargées à consulter. *
* pos = position de début de lecture. [OUT] *
* header = structure lue à retourner. [OUT] *
* *
* Description : Procède à la lecture d'une en-tête de programme PE. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool read_pe_nt_header(const GPeFormat *format, off_t *pos, image_nt_headers *header)
{
bool result; /* Bilan à retourner */
const bin_t *content; /* Contenu binaire à lire */
off_t length; /* Taille totale du contenu */
content = G_BIN_FORMAT(format)->content;
length = G_BIN_FORMAT(format)->length;
result = read_u32(&header->signature, content, pos, length, SRE_LITTLE);
result &= read_pe_file_header(format, pos, &header->file_header);
result &= read_pe_optional_header(format, pos, &header->optional_header);
return result;
}
/******************************************************************************
* *
* Paramètres : format = informations chargées à consulter. *
* pos = position de début de lecture. [OUT] *
* section = structure lue à retourner. [OUT] *
* *
* Description : Procède à la lecture d'une en-tête de section PE. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool read_pe_image_section_header(const GPeFormat *format, off_t *pos, image_section_header *section)
{
bool result; /* Bilan à retourner */
const bin_t *content; /* Contenu binaire à lire */
off_t length; /* Taille totale du contenu */
size_t i; /* Boucle de parcours */
content = G_BIN_FORMAT(format)->content;
length = G_BIN_FORMAT(format)->length;
result = true;
for (i = 0; i < IMAGE_SIZEOF_SHORT_NAME && result; i++)
result = read_u8((uint8_t *)§ion->name[i], content, pos, length, SRE_LITTLE);
result &= read_u32(§ion->misc.physical_address, content, pos, length, SRE_LITTLE);
result &= read_u32(§ion->virtual_address, content, pos, length, SRE_LITTLE);
result &= read_u32(§ion->size_of_raw_data, content, pos, length, SRE_LITTLE);
result &= read_u32(§ion->pointer_to_raw_data, content, pos, length, SRE_LITTLE);
result &= read_u32(§ion->pointer_to_relocations, content, pos, length, SRE_LITTLE);
result &= read_u32(§ion->pointer_to_line_numbers, content, pos, length, SRE_LITTLE);
result &= read_u16(§ion->number_of_relocations, content, pos, length, SRE_LITTLE);
result &= read_u16(§ion->number_of_line_numbers, content, pos, length, SRE_LITTLE);
result &= read_u32(§ion->characteristics, content, pos, length, SRE_LITTLE);
return result;
}
/******************************************************************************
* *
* Paramètres : format = informations chargées à consulter. *
* pos = position de début de lecture. [OUT] *
* desc = structure lue à retourner. [OUT] *
* *
* Description : Procède à la lecture d'un répertoire de programme PE. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool read_pe_image_import_descriptor(const GPeFormat *format, off_t *pos, image_import_descriptor *desc)
{
bool result; /* Bilan à retourner */
const bin_t *content; /* Contenu binaire à lire */
off_t length; /* Taille totale du contenu */
content = G_BIN_FORMAT(format)->content;
length = G_BIN_FORMAT(format)->length;
result = read_u32(&desc->original_first_thunk, content, pos, length, SRE_LITTLE);
result &= read_u32(&desc->time_date_stamp, content, pos, length, SRE_LITTLE);
result &= read_u32(&desc->forwarder_chain, content, pos, length, SRE_LITTLE);
result &= read_u32(&desc->module_name, content, pos, length, SRE_LITTLE);
result &= read_u32(&desc->first_thunk, content, pos, length, SRE_LITTLE);
return result;
}
/******************************************************************************
* *
* Paramètres : format = informations chargées à consulter. *
* pos = position de début de lecture. [OUT] *
* import = structure lue à retourner. [OUT] *
* *
* Description : Procède à la lecture d'une fonction importée par son nom. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool read_pe_image_import_by_name(const GPeFormat *format, off_t *pos, image_import_by_name *import)
{
bool result; /* Bilan à retourner */
const bin_t *content; /* Contenu binaire à lire */
off_t length; /* Taille totale du contenu */
uint32_t link; /* Lien vers la prochaine zone */
off_t new_pos; /* Nouvelle tête de lecture */
size_t i; /* Boucle de parcours */
content = G_BIN_FORMAT(format)->content;
length = G_BIN_FORMAT(format)->length;
result = read_u32(&link, content, pos, length, SRE_LITTLE);
if (link == 0)
memset(import, 0, sizeof(image_import_by_name));
else if (link % 2 == 0)
{
new_pos = link;
result = read_u16(&import->hint, content, &new_pos, length, SRE_LITTLE);
import->name = (char *)calloc(1, sizeof(char));
for (i = 0; result; i++)
{
result = read_u8((uint8_t *)&import->name[i], content, &new_pos, length, SRE_LITTLE);
if (import->name[i] == '\0')
break;
import->name = (char *)realloc(import->name, (i + 2) * sizeof(char));
}
}
else /* TODO */;
return result;
}
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