Cannot find plain text string after compiling
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I'm analysing a 13MB binary, including qt code, SVGs and other stuff. It contains a GUI where I can login using a password.
$ file binary
binary: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 2.6.16, with debug_info, not stripped
I also know the source code, part of it look like this:
function checkPassword(password){
var pw1 = "asdf";
var pw2 = "asdf!+jkl";
var userlevel = 0;
switch(password){
case pw1:
userlevel = 1;
break;
case pw2:
userlevel = 2;
break;
default:
userlevel = 0;
break;
}
return userlevel;
}
I know that putting passwords in the binary in plaintext is a bad idea, but that is not the point.
I tried to find the password(s) in the binary using ida, hopper and GNU strings, but neither was able to find it. The binary is too big and complex for me to walk through it using ida. The passwords are pure ascii.
Why can't I find the strings?
Which other tools should I try to find the strings?
binary reverse-engineering ida hopper
asked Nov 20 at 12:44
Niklas
183
add a comment |
up vote
0
down vote
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I'm analysing a 13MB binary, including qt code, SVGs and other stuff. It contains a GUI where I can login using a password.
$ file binary
binary: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 2.6.16, with debug_info, not stripped
I also know the source code, part of it look like this:
function checkPassword(password){
var pw1 = "asdf";
var pw2 = "asdf!+jkl";
var userlevel = 0;
switch(password){
case pw1:
userlevel = 1;
break;
case pw2:
userlevel = 2;
break;
default:
userlevel = 0;
break;
}
return userlevel;
}
I know that putting passwords in the binary in plaintext is a bad idea, but that is not the point.
I tried to find the password(s) in the binary using ida, hopper and GNU strings, but neither was able to find it. The binary is too big and complex for me to walk through it using ida. The passwords are pure ascii.
Why can't I find the strings?
Which other tools should I try to find the strings?
binary reverse-engineering ida hopper
asked Nov 20 at 12:44
Niklas
183
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm analysing a 13MB binary, including qt code, SVGs and other stuff. It contains a GUI where I can login using a password.
$ file binary
binary: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 2.6.16, with debug_info, not stripped
I also know the source code, part of it look like this:
function checkPassword(password){
var pw1 = "asdf";
var pw2 = "asdf!+jkl";
var userlevel = 0;
switch(password){
case pw1:
userlevel = 1;
break;
case pw2:
userlevel = 2;
break;
default:
userlevel = 0;
break;
}
return userlevel;
}
I know that putting passwords in the binary in plaintext is a bad idea, but that is not the point.
I tried to find the password(s) in the binary using ida, hopper and GNU strings, but neither was able to find it. The binary is too big and complex for me to walk through it using ida. The passwords are pure ascii.
Why can't I find the strings?
Which other tools should I try to find the strings?
binary reverse-engineering ida hopper
asked Nov 20 at 12:44
Niklas
183
I'm analysing a 13MB binary, including qt code, SVGs and other stuff. It contains a GUI where I can login using a password.
$ file binary
binary: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 2.6.16, with debug_info, not stripped
I also know the source code, part of it look like this:
function checkPassword(password){
var pw1 = "asdf";
var pw2 = "asdf!+jkl";
var userlevel = 0;
switch(password){
case pw1:
userlevel = 1;
break;
case pw2:
userlevel = 2;
break;
default:
userlevel = 0;
break;
}
return userlevel;
}
I know that putting passwords in the binary in plaintext is a bad idea, but that is not the point.
I tried to find the password(s) in the binary using ida, hopper and GNU strings, but neither was able to find it. The binary is too big and complex for me to walk through it using ida. The passwords are pure ascii.
Why can't I find the strings?
Which other tools should I try to find the strings?
binary reverse-engineering ida hopper
binary reverse-engineering ida hopper
asked Nov 20 at 12:44
Niklas
183
asked Nov 20 at 12:44
Niklas
183
asked Nov 20 at 12:44
Niklas
183
asked Nov 20 at 12:44
Niklas
183
asked Nov 20 at 12:44
Niklas
183
183
add a comment |
add a comment |
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