badtouch

badtouch is a scriptable network authentication cracker. While the space for common service bruteforce is already very well saturated, you may still end up writing your own python scripts when testing credentials for web applications.

The scope of badtouch is specifically cracking custom services. This is done by writing scripts that are loaded into a lua runtime. Those scripts represent a single service and provide a

verify(user, password)

Installation

If you are on an archlinux based system, use

pacman -S badtouch

If you are on Mac OSX, use

brew install badtouch

To build from source, make sure you have rust and

libssl-dev

cargo install

Verify your setup is complete with

badtouch --help

Debian

1. Install essential build tools

   sudo apt-get update && sudo apt-get dist-upgrade
   sudo apt-get install build-essential libssl-dev pkg-config
   

2. Install rust

   curl -sf -L https://static.rust-lang.org/rustup.sh | sh
   source $HOME/.cargo/env
   

3. Install badtouch

   cd /path/to/badtouch
   cargo install
   

Scripting

A simple script could look like this:

descr = "example.com"

function verify(user, password)
    session = http_mksession()
-- get csrf token
req = http_request(session, 'GET', 'https://example.com/login', {})
resp = http_send(req)
if last_err() then return end

-- parse token from html
html = resp['text']
csrf = html_select(html, 'input[name="csrf"]')
token = csrf["attrs"]["value"]

-- send login
req = http_request(session, 'POST', 'https://example.com/login', {
    form={
        user=user,
        password=password,
        csrf=token
    }
})
resp = http_send(req)
if last_err() then return end

-- search response for successful login
html = resp['text']
return html:find('Login successful') != nil
end

Please see the reference and examples for all available functions. Keep in mind that you can use

print(x)

badtouch oneshot

Reference

• base64_decode
• base64_encode
• clear_err
• execve
• hex
• hmac_md5
• hmac_sha1
• hmacsha2256
• hmacsha2512
• hmacsha3256
• hmacsha3512
• html_select
• htmlselectlist
• httpbasicauth
• http_mksession
• http_request
• http_send
• json_decode
• json_encode
• last_err
• ldap_bind
• ldap_escape
• ldapsearchbind
• md5
• mysql_connect
• mysql_query
• print
• rand
• randombytes
• sha1
• sha2_256
• sha2_512
• sha3_256
• sha3_512
• sleep
• sock_connect
• sock_send
• sock_recv
• sock_sendline
• sock_recvline
• sock_recvall
• sockrecvlinecontains
• sockrecvlineregex
• sock_recvn
• sock_recvuntil
• sock_sendafter
• sock_newline
• Examples
• Configuration
• Wrapping python scripts

base64_decode

Decode a base64 string.

lua
base64_decode("ww==")

base64_encode

Encode a binary array with base64.

lua
base64_encode("\x00\xff")

clear_err

Clear all recorded errors to prevent a requeue.

lua
if last_err() then
    clear_err()
    return false
else
    return true
end

execve

Execute an external program. Returns the exit code.

lua
execve("myprog", {"arg1", "arg2", "--arg", "3"})

hex

Hex encode a list of bytes.

lua
hex("\x6F\x68\x61\x69\x0A\x00")

hmac_md5

Calculate an hmac with md5. Returns a binary array.

lua
hmac_md5("secret", "my authenticated message")

hmac_sha1

Calculate an hmac with sha1. Returns a binary array.

lua
hmac_sha1("secret", "my authenticated message")

hmacsha2256

Calculate an hmac with sha2256. Returns a binary array. ```lua hmacsha2_256("secret", "my authenticated message") ```

hmacsha2512

Calculate an hmac with sha2512. Returns a binary array. ```lua hmacsha2_512("secret", "my authenticated message") ```

hmacsha3256

Calculate an hmac with sha3256. Returns a binary array. ```lua hmacsha3_256("secret", "my authenticated message") ```

hmacsha3512

Calculate an hmac with sha3512. Returns a binary array. ```lua hmacsha3_512("secret", "my authenticated message") ```

html_select

Parses an html document and returns the first element that matches the css selector. The return value is a table with

text

attrs

lua
csrf = html_select(html, 'input[name="csrf"]')
token = csrf["attrs"]["value"]

htmlselectlist

Same as

html_select

lua
html_select_list(html, 'input[name="csrf"]')

httpbasicauth

Sends a

GET

true

WWW-Authenticate

401

lua
http_basic_auth("https://httpbin.org/basic-auth/foo/buzz", user, password)

http_mksession

Create a session object. This is similar to

requests.Session

lua
session = http_mksession()

http_request

Prepares an http request. The first argument is the session reference and cookies from that session are copied into the request. After the request has been sent, the cookies from the response are copied back into the session.

The next arguments are the

method

url

{}

• query

  - a map of query parameters that should be set on the url

• headers

  - a map of headers that should be set

• basic_auth

  - configure the basic auth header with

  {"user, "password"}

• user_agent

  - overwrite the default user agent with a string

• json

  - the request body that should be json encoded

• form

  - the request body that should be form encoded

• body

  - the raw request body as string

req = http_request(session, 'POST', 'https://httpbin.org/post', {
    json={
        user=user,
        password=password,
    }
})
resp = http_send(req)
if last_err() then return end
if resp["status"] ~= 200 then return "invalid status code" end

http_send

Send the request that has been built with

http_request

• status

  - the http status code

• headers

  - a table of headers

• text

  - the response body as string

req = http_request(session, 'POST', 'https://httpbin.org/post', {
    json={
        user=user,
        password=password,
    }
})
resp = http_send(req)
if last_err() then return end
if resp["status"] ~= 200 then return "invalid status code" end

json_decode

Decode a lua value from a json string.

lua
json_decode("{\"data\":{\"password\":\"fizz\",\"user\":\"bar\"},\"list\":[1,3,3,7]}")

json_encode

Encode a lua value to a json string. Note that empty tables are encoded to an empty object

{}

[]

lua
x = json_encode({
    hello="world",
    almost_one=0.9999,
    list={1,3,3,7},
    data={
        user=user,
        password=password,
        empty=nil
    }
})

last_err

Returns

nil

lua
if last_err() then return end

ldap_bind

Connect to an ldap server and try to authenticate with the given user.

lua
ldap_bind("ldaps://ldap.example.com/",
    "cn=\"" .. ldap_escape(user) .. "\",ou=users,dc=example,dc=com", password)

ldap_escape

Escape an attribute value in a relative distinguished name.

lua
ldap_escape(user)

ldapsearchbind

Connect to an ldap server, log into a search user, search for the target user and then try to authenticate with the first DN that was returned by the search.

lua
ldap_search_bind("ldaps://ldap.example.com/",
    -- the user we use to find the correct DN
    "cn=search_user,ou=users,dc=example,dc=com", "searchpw",
    -- base DN we search in
    "dc=example,dc=com",
    -- the user we test
    user, password)

md5

Hash a byte array with md5 and return the results as bytes.

lua
hex(md5("\x00\xff"))

mysql_connect

Connect to a mysql database and try to authenticate with the provided credentials. Returns a mysql connection on success.

lua
sock = mysql_connect("127.0.0.1", 3306, user, password)

mysql_query

Run a query on a mysql connection. The 3rd parameter is for prepared statements.

lua
rows = mysql_query(sock, 'SELECT VERSION(), :foo as foo', {
    foo='magic'
})

print

Prints the value of a variable. Please note that this bypasses the regular writer and may interfer with the progress bar. Only use this for debugging.

lua
print({
    data={
        user=user,
        password=password
    }
})

rand

Returns a random

u32

lua
rand(0, 256)

randombytes

Generate the specified number of random bytes.

lua
randombytes(16)

sha1

Hash a byte array with sha1 and return the results as bytes.

lua
hex(sha1("\x00\xff"))

sha2_256

Hash a byte array with sha2256 and return the results as bytes. ```lua hex(sha2256("\x00\xff")) ```

sha2_512

Hash a byte array with sha2512 and return the results as bytes. ```lua hex(sha2512("\x00\xff")) ```

sha3_256

Hash a byte array with sha3256 and return the results as bytes. ```lua hex(sha3256("\x00\xff")) ```

sha3_512

Hash a byte array with sha3512 and return the results as bytes. ```lua hex(sha3512("\x00\xff")) ```

sleep

Pauses the thread for the specified number of seconds. This is mostly used to debug concurrency.

lua
sleep(3)

sock_connect

Create a tcp connection.

lua
sock = sock_connect("127.0.0.1", 1337)

sock_send

Send data to the socket.

lua
sock_send(sock, "hello world")

sock_recv

Receive up to 4096 bytes from the socket.

lua
x = sock_recv(sock)

sock_sendline

Send a string to the socket. A newline is automatically appended to the string.

lua
sock_sendline(sock, line)

sock_recvline

Receive a line from the socket. The line includes the newline.

lua
x = sock_recvline(sock)

sock_recvall

Receive all data from the socket until EOF.

lua
x = sock_recvall(sock)

sockrecvlinecontains

Receive lines from the server until a line contains the needle, then return this line.

lua
x = sock_recvline_contains(sock, needle)

sockrecvlineregex

Receive lines from the server until a line matches the regex, then return this line.

lua
x = sock_recvline_regex(sock, "^250 ")

sock_recvn

Receive exactly n bytes from the socket.

lua
x = sock_recvn(sock, 4)

sock_recvuntil

Receive until the needle is found, then return all data including the needle.

lua
x = sock_recvuntil(sock, needle)

sock_sendafter

Receive until the needle is found, then write data to the socket.

lua
sock_sendafter(sock, needle, data)

sock_newline

Overwrite the default

\n

lua
sock_newline(sock, "\r\n")

Configuration

You can place a config file at

~/.config/badtouch.toml

Global user agent

[runtime]
user_agent = "w3m/0.5.3+git20180125"

RLIMIT_NOFILE

[runtime]
# requires CAP_SYS_RESOURCE
# sudo setcap 'CAP_SYS_RESOURCE=+ep' /usr/bin/badtouch
rlimit_nofile = 64000

Wrapping python scripts

The badtouch runtime is still very bare bones, so you might have to shell out to your regular python script occasionally. Your wrapper may look like this:

descr = "example.com"

function verify(user, password)
    ret = execve("./docs/test.py", {user, password})
    if last_err() then return end
if ret == 2 then
    return "script signaled an exception"
end

return ret == 0
end

Your python script may look like this:

import sys

try:
    if sys.argv[1] == "foo" and sys.argv[2] == "bar":
        # correct credentials
        sys.exit(0)
    else:
        # incorrect credentials
        sys.exit(1)
except:
    # signal an exception
    # this requeues the attempt instead of discarding it
    sys.exit(2)

License

GPLv3+