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/* OpenIDA - Outil d'analyse de fichiers binaires
* e_java.c - support du format Java
*
* Copyright (C) 2008 Cyrille Bagard
*
* This file is part of OpenIDA.
*
* 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 "e_java.h"
#include <malloc.h>
#include <string.h>
#include "attribute.h"
#include "field.h"
#include "java-int.h"
#include "method.h"
#include "pool.h"
#include "../../common/endianness.h"
/******************************************************************************
* *
* Paramètres : content = contenu binaire à parcourir. *
* length = taille du contenu en question. *
* *
* Description : Indique si le format peut être pris en charge ici. *
* *
* Retour : true si la réponse est positive, false sinon. *
* *
* Remarques : - *
* *
******************************************************************************/
bool java_is_matching(const uint8_t *content, off_t length)
{
bool result; /* Bilan à faire connaître */
result = false;
if (length >= 4)
result = (strncmp((const char *)content, "\xca\xfe\xba\xbe", 4) == 0);
return result;
}
/******************************************************************************
* *
* Paramètres : content = contenu binaire à parcourir. *
* length = taille du contenu en question. *
* *
* Description : Prend en charge une nouvelle classe Java. *
* *
* Retour : Adresse de la structure mise en place ou NULL en cas d'échec.*
* *
* Remarques : - *
* *
******************************************************************************/
exe_format *load_java(const uint8_t *content, off_t length)
{
java_format *result; /* Adresse à retourner */
off_t pos; /* Point d'analyse */
uint32_t magic; /* Identifiant Java */
uint16_t i; /* Boucle de parcours */
result = (java_format *)calloc(1, sizeof(java_format));
EXE_FORMAT(result)->content = content;
EXE_FORMAT(result)->length = length;
pos = 0;
if (!read_u32(&magic, content, &pos, length, SRE_BIG))
goto ldj_error;
if (!read_u16(&result->minor_version, content, &pos, length, SRE_BIG))
goto ldj_error;
if (!read_u16(&result->major_version, content, &pos, length, SRE_BIG))
goto ldj_error;
if (!load_java_pool(result, &pos))
goto ldj_error;
if (!read_u16((uint16_t *)&result->access, content, &pos, length, SRE_BIG))
goto ldj_error;
if (!read_u16(&result->this_class, content, &pos, length, SRE_BIG))
goto ldj_error;
if (!read_u16(&result->super_class, content, &pos, length, SRE_BIG))
goto ldj_error;
if (!read_u16(&result->interfaces_count, content, &pos, length, SRE_BIG))
goto ldj_error;
for (i = 0; i < result->interfaces_count; i++)
if (!read_u16(&result->interfaces[i], content, &pos, length, SRE_BIG))
goto ldj_error;
if (!load_java_fields(result, &pos))
goto ldj_error;
if (!load_java_methods(result, &pos))
goto ldj_error;
if (!load_java_attributes(result, &pos, &result->attributes, &result->attributes_count))
goto ldj_error;
return EXE_FORMAT(result);
ldj_error:
unload_java(result);
return NULL;
}
/******************************************************************************
* *
* Paramètres : format = description de l'exécutable à supprimer. *
* *
* Description : Efface la prise en charge une nouvelle classe Java. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
void unload_java(java_format *format)
{
if (format->pool_len > 0)
unload_java_pool(format);
if (format->interfaces_count > 0)
free(format->interfaces);
if (format->fields_count > 0)
unload_java_fields(format);
if (format->methods_count > 0)
unload_java_methods(format);
if (format->attributes_count > 0)
unload_java_attributes(format, format->attributes, format->attributes_count);
free(format);
}
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