diff options
Diffstat (limited to 'bfd')
| -rwxr-xr-x | bfd/load.py | 260 | ||||
| -rw-r--r-- | bfd/makefile | 21 | ||||
| -rw-r--r-- | bfd/test/test.c | 5 |
3 files changed, 278 insertions, 8 deletions
diff --git a/bfd/load.py b/bfd/load.py new file mode 100755 index 0000000..6f8a0af --- /dev/null +++ b/bfd/load.py @@ -0,0 +1,260 @@ +#!/bin/python3 + +class Colors: + purple = '\033[95m' + blue = '\033[94m' + green = '\033[92m' + yellow = '\033[93m' + red = '\033[91m' + grey = '\033[1;37m' + darkgrey = '\033[1;30m' + cyan = '\033[1;36m' + ENDC = '\033[0m' + BOLD = '\033[1m' + UNDERLINE = '\033[4m' + + +def openSO_r(path): + so = open(path, "rb") + return so + + +def openSO_w(path): + so = open(path, "wb") + return so + + +class ELFHDR(): + def __init__(self, ei_mag, ei_class, ei_data, ei_version, ei_osabi, ei_abiversion, + ei_pad, e_type, e_machine, e_version, e_entry, e_phoff, + e_shoff, e_flags, e_ehsize, e_phentsize, e_phnum, e_shentsize, + e_shnum, e_shstrndx): + self.ei_mag = ei_mag + self.ei_class = ei_class + self.ei_data = ei_data + self.ei_version = ei_version + self.ei_osabi = ei_osabi + self.ei_abiversion = ei_abiversion + self.ei_pad = ei_pad + self.e_type = e_type + self.e_machine = e_machine + self.e_version = e_version + self.e_entry = e_entry + self.e_phoff = e_phoff + self.e_shoff = e_shoff + self.e_flags = e_flags + self.e_ehsize = e_ehsize + self.e_phentsize = e_phentsize + self.e_phnum = e_phnum + self.e_shentsize = e_shentsize + self.e_shnum = e_shnum + self.e_shstrndx = e_shstrndx + + +class PHDR(): + def __init__(self, p_type, p_flags, p_offset, p_vaddr, p_paddr, p_filesz, + p_memsz, p_flags2, p_align): + self.p_type = p_type + self.p_flags = p_flags + self.p_offset = p_offset + self.p_vaddr = p_vaddr + self.p_paddr = p_paddr + self.p_filesz = p_filesz + self.p_memsz = p_memsz + self.p_flags2 = p_flags2 + self.p_align = p_align + + +class SHDR(): + def __init__(self, sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, + sh_link, sh_info, sh_addralign, sh_entsize): + self.sh_name = sh_name + self.sh_type = sh_type + self.sh_flags = sh_flags + self.sh_addr = sh_addr + self.sh_offset = sh_offset + self.sh_size = sh_size + self.sh_link = sh_link + self.sh_info = sh_info + self.sh_addralign = sh_addralign + self.sh_entsize = sh_entsize + + +class ELF(object): + def __init__(self, so): + self.so = so + self.so.seek(0, 0) + self.elfhdr = ELFHDR(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0) + self.phdr = [] + self.shhdr = [] + self.size = int() + + def init(self, size): + self.size = size + self.read_ELF_H(size) + self.so.seek(int.from_bytes(self.elfhdr.e_phoff, byteorder="little", signed=False)) + phnum = int.from_bytes(self.elfhdr.e_phnum, byteorder="little", signed=False) + for i in range(0, phnum): + self.read_PHDR(size) + self.so.seek(int.from_bytes(self.elfhdr.e_shoff, byteorder="little", signed=False)) + shnum = int.from_bytes(self.elfhdr.e_shnum, byteorder="little", signed=False) + for i in range(0, shnum): + self.read_SHDR(size) + self.read_SHDR(size) + + # 32 or 64 + def read_ELF_H(self, size): + self.elfhdr.ei_mag = self.so.read(4) + self.elfhdr.ei_class = self.so.read(1) + self.elfhdr.ei_data = self.so.read(1) + self.elfhdr.ei_version = self.so.read(1) + self.elfhdr.ei_osabi = self.so.read(1) + self.elfhdr.ei_abiversion = self.so.read(1) + self.elfhdr.ei_pad = self.so.read(7) + self.elfhdr.e_type = self.so.read(2) + self.elfhdr.e_machine = self.so.read(2) + self.elfhdr.e_version = self.so.read(4) + if size == 32: self.elfhdr.e_entry = self.so.read(4) + elif size == 64: self.elfhdr.e_entry = self.so.read(8) + if size == 32: self.elfhdr.e_phoff = self.so.read(4) + elif size == 64: self.elfhdr.e_phoff = self.so.read(8) + if size == 32: self.elfhdr.e_shoff = self.so.read(4) + elif size == 64: self.elfhdr.e_shoff = self.so.read(8) + self.elfhdr.e_flags = self.so.read(4) + self.elfhdr.e_ehsize = self.so.read(2) + self.elfhdr.e_phentsize = self.so.read(2) + self.elfhdr.e_phnum = self.so.read(2) + self.elfhdr.e_shentsize = self.so.read(2) + self.elfhdr.e_shnum = self.so.read(2) + self.elfhdr.e_shstrndx = self.so.read(2) + + def read_PHDR(self, size): + dummy = PHDR(0,0,0,0,0,0,0,0,0) + dummy.p_type = self.so.read(4) + dummy.p_flags = self.so.read(4) + if size == 32: dummy.p_offset = self.so.read(4) + elif size == 64: dummy.p_offset = self.so.read(8) + if size == 32: dummy.p_vaddr = self.so.read(4) + elif size == 64: dummy.p_vaddr = self.so.read(8) + if size == 32: dummy.p_paddr = self.so.read(4) + elif size == 64: dummy.p_paddr = self.so.read(8) + if size == 32: dummy.p_filesz = self.so.read(4) + elif size == 64: dummy.p_filesz = self.so.read(8) + if size == 32: dummy.p_memsz = self.so.read(4) + elif size == 64: dummy.p_memsz = self.so.read(8) + if size == 32: dummy.p_flags2 = self.so.read(4) + elif size == 64: pass + if size == 32: dummy.p_align = self.so.read(4) + elif size == 64: dummy.p_align = self.so.read(8) + self.phdr.append(dummy) + + def read_SHDR(self, size): + dummy = SHDR(0,0,0,0,0,0,0,0,0,0) + dummy.sh_name = self.so.read(4) + dummy.sh_type = self.so.read(4) + if size == 32: dummy.sh_flags = self.so.read(4) + elif size == 64: dummy.sh_flags = self.so.read(8) + if size == 32: dummy.sh_addr = self.so.read(4) + elif size == 64: dummy.sh_addr = self.so.read(8) + if size == 32: dummy.sh_offset = self.so.read(4) + elif size == 64: dummy.sh_offset = self.so.read(8) + if size == 32: dummy.sh_size = self.so.read(4) + elif size == 64: dummy.sh_size = self.so.read(8) + if size == 32: dummy.sh_link = self.so.read(4) + elif size == 64: pass + if size == 32: dummy.sh_info = self.so.read(4) + elif size == 64: pass + if size == 32: dummy.sh_addralign = self.so.read(4) + elif size == 64: dummy.sh_addralign = self.so.read(8) + if size == 32: dummy.sh_entsize = self.so.read(4) + elif size == 64: dummy.sh_entsize = self.so.read(8) + self.shhdr.append(dummy) + + def dump_header(self): + print("------------------------------------------------------------------------------") + print(Colors.green + "elf header:" + Colors.ENDC) + print(Colors.blue + "ei_mag: " + Colors.cyan + repr(self.elfhdr.ei_mag) + Colors.ENDC) + print(Colors.blue + "ei_class: " + Colors.cyan + repr(self.elfhdr.ei_class) + Colors.ENDC) + print(Colors.blue + "ei_data: " + Colors.cyan + repr(self.elfhdr.ei_data) + Colors.ENDC) + print(Colors.blue + "ei_version: " + Colors.cyan + repr(self.elfhdr.ei_version) + Colors.ENDC) + print(Colors.blue + "ei_osabi: " + Colors.cyan + repr(self.elfhdr.ei_osabi) + Colors.ENDC) + print(Colors.blue + "ei_abiversion: " + Colors.cyan + repr(self.elfhdr.ei_abiversion) + Colors.ENDC) + print(Colors.blue + "ei_pad: " + Colors.cyan + repr(self.elfhdr.ei_pad) + Colors.ENDC) + print(Colors.blue + "e_type: " + Colors.cyan + repr(self.elfhdr.e_type) + Colors.ENDC) + print(Colors.blue + "e_machine: " + Colors.cyan + repr(self.elfhdr.e_machine) + Colors.ENDC) + print(Colors.blue + "e_version: " + Colors.cyan + repr(self.elfhdr.e_version) + Colors.ENDC) + print(Colors.blue + "e_entry: " + Colors.cyan + repr(self.elfhdr.e_entry) + Colors.ENDC) + print(Colors.blue + "e_phoff: " + Colors.cyan + repr(self.elfhdr.e_phoff) + Colors.ENDC) + print(Colors.blue + "e_shoff: " + Colors.cyan + repr(self.elfhdr.e_shoff) + Colors.ENDC) + print(Colors.blue + "e_flags: " + Colors.cyan + repr(self.elfhdr.e_flags) + Colors.ENDC) + print(Colors.blue + "e_ehsize: " + Colors.cyan + repr(self.elfhdr.e_ehsize) + Colors.ENDC) + print(Colors.blue + "e_phentsize: " + Colors.cyan + repr(self.elfhdr.e_phentsize) + Colors.ENDC) + print(Colors.blue + "e_phnum: " + Colors.cyan + repr(self.elfhdr.e_phnum) + Colors.ENDC) + print(Colors.blue + "e_shentsize: " + Colors.cyan + repr(self.elfhdr.e_shentsize) + Colors.ENDC) + print(Colors.blue + "e_shnum: " + Colors.cyan + repr(self.elfhdr.e_shnum) + Colors.ENDC) + print(Colors.blue + "e_shstrndx: " + Colors.cyan + repr(self.elfhdr.e_shstrndx) + Colors.ENDC) + print("------------------------------------------------------------------------------") + + def dump_phdrs(self): + print(Colors.green + "pheaders:" + Colors.ENDC) + for i in range(0, int.from_bytes(self.elfhdr.e_phnum, byteorder="little", signed=False)): + print("------------------------------------------------------------------------------") + print(Colors.blue + "p_type: " + Colors.cyan + repr(self.phdr[i].p_type) + Colors.ENDC) + print(Colors.blue + "p_flags: " + Colors.cyan + repr(self.phdr[i].p_flags) + Colors.ENDC) + print(Colors.blue + "p_offset: " + Colors.cyan + repr(self.phdr[i].p_offset) + Colors.ENDC) + print(Colors.blue + "p_vaddr: " + Colors.cyan + repr(self.phdr[i].p_vaddr) + Colors.ENDC) + print(Colors.blue + "p_paddr: " + Colors.cyan + repr(self.phdr[i].p_paddr) + Colors.ENDC) + print(Colors.blue + "p_filesz: " + Colors.cyan + repr(self.phdr[i].p_filesz) + Colors.ENDC) + print(Colors.blue + "p_memsz: " + Colors.cyan + repr(self.phdr[i].p_memsz) + Colors.ENDC) + print(Colors.blue + "p_flags2: " + Colors.cyan + repr(self.phdr[i].p_flags2) + Colors.ENDC) + print(Colors.blue + "p_align: " + Colors.cyan + repr(self.phdr[i].p_align) + Colors.ENDC) + print("------------------------------------------------------------------------------") + + def dump_shdrs(self): + print(Colors.green + "sheaders:" + Colors.ENDC) + for i in range(0, int.from_bytes(self.elfhdr.e_shnum, byteorder="little", signed=False)): + print("------------------------------------------------------------------------------") + print(Colors.blue + "sh_name: " + Colors.cyan + repr(self.shhdr[i].sh_name) + Colors.ENDC) + print(Colors.blue + "sh_type: " + Colors.cyan + repr(self.shhdr[i].sh_type) + Colors.ENDC) + print(Colors.blue + "sh_flags: " + Colors.cyan + repr(self.shhdr[i].sh_flags) + Colors.ENDC) + print(Colors.blue + "sh_addr: " + Colors.cyan + repr(self.shhdr[i].sh_addr) + Colors.ENDC) + print(Colors.blue + "sh_offset: " + Colors.cyan + repr(self.shhdr[i].sh_offset) + Colors.ENDC) + print(Colors.blue + "sh_size: " + Colors.cyan + repr(self.shhdr[i].sh_size) + Colors.ENDC) + print(Colors.blue + "sh_link: " + Colors.cyan + repr(self.shhdr[i].sh_link) + Colors.ENDC) + print(Colors.blue + "sh_info: " + Colors.cyan + repr(self.shhdr[i].sh_info) + Colors.ENDC) + print(Colors.blue + "sh_addralign: " + Colors.cyan + repr(self.shhdr[i].sh_addralign) + Colors.ENDC) + print(Colors.blue + "sh_entsize: " + Colors.cyan + repr(self.shhdr[i].sh_entsize) + Colors.ENDC) + print("------------------------------------------------------------------------------") + + +def ch_so_to_exe(path): + so = open(path, "r+b") + so.seek(16) + so.write(bytes([2])) + print(Colors.purple + "changed so to exe" + Colors.ENDC) + so.close + + +def ch_exe_to_so(path): + so = open(path, "r+b") + so.seek(16, 0) + so.write(bytes(3)) + print(Colors.purple + "changed exe to so" + Colors.ENDC) + + +def main(): + so = openSO_r("./test/test.so") + elf = ELF(so) + elf.init(64) + elf.dump_header() + #elf.dump_phdrs() + #elf.dump_shdrs() + so.close() + ch_so_to_exe("./test/test.so") + so = openSO_r("./test/test.so") + elf2 = ELF(so) + elf2.init(64) + elf.dump_header() + +if __name__ == "__main__": + main() diff --git a/bfd/makefile b/bfd/makefile index 7cb4918..2720678 100644 --- a/bfd/makefile +++ b/bfd/makefile @@ -1,15 +1,15 @@ ##################################VARS################################# CC=clang -CC_FLAGS= +CC_FLAGS=-fpic LD_FLAGS= -l bfd TARGET=main ##################################RULES################################ .DEFAULT:all -.PHONY:all clean help $(TARGET) +.PHONY:all clean help $(TARGET) $(TARGET).so test -all:$(TARGET) +all:$(TARGET) $(TARGET).so test .c.o: $(CC) $(CC_FLAGS) -c $< -o $@ @@ -17,14 +17,19 @@ all:$(TARGET) $(TARGET): $(TARGET).o $(CC) $^ $(LD_FLAGS) -o $@ +$(TARGET).so: $(TARGET).o + $(CC) $^ $(LD_FLAGS) -shared -o $@ + +test: + $(MAKE) -C ./test + clean: - rm -f *.o *~ $(TARGET) + rm -f *.o *~ $(TARGET) $(TARGET).so + $(MAKE) -C ./test clean + help: - @echo 'all builds the daemon, the server and the client. all is the default.' - @echo 'mutatord builds the daemon with the server' - @echo 'mutatorc builds the client' - @echo 'mutators builds the standalone server' + @echo 'all builds so and exe. all is the default.' @echo 'clean runs clean.' @echo 'help runs help.' diff --git a/bfd/test/test.c b/bfd/test/test.c new file mode 100644 index 0000000..0327658 --- /dev/null +++ b/bfd/test/test.c @@ -0,0 +1,5 @@ +#include "stdio.h" + +int main(int argc, char** argv) { + printf("i live!\n"); +} |