gbrochar
/
woody-woodpacker
1
0
Fork 0
Code Issues 1 Pull Requests 1 Packages Projects Releases Wiki Activity

Compare commits

base: gbrochar:b1675739253af69a696a11c43f9aa3b0e35cdea9
Branches Tags
gbrochar:master
gbrochar:rsa-asm
gbrochar:rsa
gbrochar:1.0.0
..
compare: gbrochar:7d417ac4e71b43765a09018cb924b58ee124a1e2
Branches Tags
gbrochar:master
gbrochar:rsa-asm
gbrochar:rsa
gbrochar:1.0.0

4 Commits
b167573925 ... 7d417ac4e7

Author SHA1 Message Date
pbonilla 7d417ac4e7 Offset more datas on codecave creation 2024-06-12 13:40:57 +02:00
pbonilla ff92116756 Modify test file 2024-06-12 13:39:57 +02:00
pbonilla 3300cea9c6 Fix Makefile 2024-06-12 13:39:29 +02:00
pbonilla 1bdcef2b95 test file added 2024-06-12 13:38:39 +02:00
10 changed files with 3038 additions and 9 deletions
Show Stats Expand all files Collapse all files

3
Makefile
View File

@ -16,7 +16,7 @@ RM = rm -f
LIBFT_FLAGS = ft_printf/libftprintf.a LIBFT_FLAGS = ft_printf/libftprintf.a
CFLAGS = -Wall -Wextra -Werror -g3 CFLAGS = -Wall -Wextra -Werror
all: ${NAME} all: ${NAME}
@ -33,6 +33,7 @@ clean:
fclean: fclean:
make -C ft_printf fclean make -C ft_printf fclean
make clean
${RM} ${NAME} ${RM} ${NAME}
re: fclean re: fclean

BIN
big_sample Executable file
View File

Binary file not shown.

1257
big_sample.hex Normal file
View File

File diff suppressed because it is too large Load Diff

2
includes/woody.h
View File

@ -36,6 +36,8 @@ typedef struct elf_content
Elf64_Ehdr *Ehdr; Elf64_Ehdr *Ehdr;
Elf64_Phdr *Phdr; Elf64_Phdr *Phdr;
Elf64_Shdr *Shdr; Elf64_Shdr *Shdr;
Elf64_Shdr *symbols_table;
Elf64_Sym *symbols;
} t_elf_content; } t_elf_content;
// utils.c // utils.c

BIN
not_that_big Executable file
View File

Binary file not shown.

1001
not_that_big.hex Normal file
View File

File diff suppressed because it is too large Load Diff

412
resources/big_sample.c Normal file
View File

@ -0,0 +1,412 @@
#include <stdio.h>
int main(void) {
printf("Hello, World!\n");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
return (0);
}

332
resources/not_that_big.c Normal file
View File

@ -0,0 +1,332 @@
#include <stdio.h>
int main(void) {
printf("Hello, World!\n");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
printf(" ");
return (0);
}

7
resources/sample.c
View File

@ -1,7 +1,6 @@
#include <stdio.h> #include <stdio.h>
int int main(void) {
main(void) { printf("Hello, World!\n");
ft_printf("Hello, World!\n"); return (0);
return (0x0);
} }

31
srcs/woody.c
View File

@ -48,16 +48,28 @@ void offset_sections(t_elf_content *woody, unsigned int from, unsigned int offse
{ {
for (int i = 0; i < woody->Ehdr->e_phnum; i++) for (int i = 0; i < woody->Ehdr->e_phnum; i++)
{ {
if (woody->Phdr[i].p_offset > from) if (woody->Phdr[i].p_offset >= from)
{ {
woody->Phdr[i].p_offset += offset_ammount; woody->Phdr[i].p_offset += offset_ammount;
woody->Phdr[i].p_flags = PF_X | PF_W | PF_R; woody->Phdr[i].p_vaddr += offset_ammount;
woody->Phdr[i].p_paddr += offset_ammount;
} }
} }
for (int i = 0; i < woody->Ehdr->e_shnum; i++) for (int i = 0; i < woody->Ehdr->e_shnum; i++)
{ {
if (woody->Shdr[i].sh_offset > from) if (woody->Shdr[i].sh_offset >= from)
{
woody->Shdr[i].sh_offset += offset_ammount; woody->Shdr[i].sh_offset += offset_ammount;
woody->Shdr[i].sh_addr += offset_ammount;
}
}
int num_symbols = get_symbols_count(woody->symbols_table->sh_size, woody->symbols_table->sh_entsize);
for (int i = 1; i < num_symbols; i++) {
if (woody->symbols[i].st_value >= from)
{
woody->symbols[i].st_value += offset_ammount;
}
// printf("symbol value = %lx\n", symbols[i].st_value);
} }
} }
@ -76,6 +88,7 @@ void create_codecave(t_elf_content *woody, t_payload *payload, size_t payload_po
woody->file = new_woody; woody->file = new_woody;
woody->file_size += padding_size; woody->file_size += padding_size;
woody->Ehdr = (Elf64_Ehdr *)new_woody; woody->Ehdr = (Elf64_Ehdr *)new_woody;
woody->Ehdr->e_shoff += padding_size;
woody->Phdr = (Elf64_Phdr *)fetch(woody->file, woody->file_size, woody->Ehdr->e_phoff, sizeof(Elf64_Phdr)); woody->Phdr = (Elf64_Phdr *)fetch(woody->file, woody->file_size, woody->Ehdr->e_phoff, sizeof(Elf64_Phdr));
woody->Shdr = (Elf64_Shdr *)fetch(woody->file, woody->file_size, woody->Ehdr->e_shoff, sizeof(Elf64_Shdr)); woody->Shdr = (Elf64_Shdr *)fetch(woody->file, woody->file_size, woody->Ehdr->e_shoff, sizeof(Elf64_Shdr));
} }
@ -141,6 +154,7 @@ void inject(t_elf_content *woody)
if (code_cave_size < payload->len) // inverse here to test the other technique if (code_cave_size < payload->len) // inverse here to test the other technique
{ {
printf("Create a codecave\n");
create_codecave(woody, payload, payload_position); create_codecave(woody, payload, payload_position);
} }
@ -167,6 +181,17 @@ int get_elf_sections(t_elf_content *woody)
woody->Shdr = (Elf64_Shdr *)fetch(woody->file, woody->file_size, woody->Ehdr->e_shoff, sizeof(Elf64_Shdr)); woody->Shdr = (Elf64_Shdr *)fetch(woody->file, woody->file_size, woody->Ehdr->e_shoff, sizeof(Elf64_Shdr));
if (!woody->Shdr|| !fetch(woody->file, woody->file_size, woody->Ehdr->e_shoff, woody->Ehdr->e_shnum * sizeof(Elf64_Shdr))) if (!woody->Shdr|| !fetch(woody->file, woody->file_size, woody->Ehdr->e_shoff, woody->Ehdr->e_shnum * sizeof(Elf64_Shdr)))
return EXIT_FAILURE; return EXIT_FAILURE;
for (int i = 0; i < woody->Ehdr->e_shnum; i++) {
if (woody->Shdr[i].sh_type == SHT_SYMTAB) {
woody->symbols_table = fetch(woody->file, woody->file_size, woody->Ehdr->e_shoff + (i * sizeof(Elf64_Shdr)), sizeof(Elf64_Shdr));
}
}
if (woody->symbols_table == NULL)
return EXIT_FAILURE; //Not sure about this
woody->symbols = (Elf64_Sym *)fetch(woody->file, woody->file_size, woody->symbols_table->sh_offset, sizeof(Elf64_Sym));
if (woody->symbols == NULL)
return EXIT_FAILURE;//Not sure about this
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }