import html
import base64
import datetime
import gzip
import shlex
import string
import urllib
from ..util import hexdump, printable_data, copy_to_clipboard, clipboard_contents, encode_basic_auth, parse_basic_auth
from ..console import CommandError
from io import StringIO
def print_maybe_bin(s):
binary = False
for c in s:
if chr(c) not in string.printable:
binary = True
break
if binary:
print(hexdump(s))
else:
print(s.decode())
def asciihex_encode_helper(s):
return ''.join('{0:x}'.format(c) for c in s).encode()
def asciihex_decode_helper(s):
ret = []
try:
for a, b in zip(s[0::2], s[1::2]):
c = chr(a)+chr(b)
ret.append(chr(int(c, 16)))
return ''.join(ret).encode()
except Exception as e:
raise CommandError(e)
def gzip_encode_helper(s):
out = StringIO.StringIO()
with gzip.GzipFile(fileobj=out, mode="w") as f:
f.write(s)
return out.getvalue()
def gzip_decode_helper(s):
dec_data = gzip.GzipFile('', 'rb', 9, StringIO.StringIO(s))
dec_data = dec_data.read()
return dec_data
def base64_decode_helper(s):
try:
return base64.b64decode(s)
except TypeError:
for i in range(1, 5):
try:
s_padded = base64.b64decode(s + '='*i)
return s_padded
except:
pass
raise CommandError("Unable to base64 decode string")
def url_decode_helper(s):
bs = s.decode()
return urllib.parse.unquote(bs).encode()
def url_encode_helper(s):
bs = s.decode()
return urllib.parse.quote_plus(bs).encode()
def html_encode_helper(s):
return ''.join(['&#x{0:x};'.format(c) for c in s]).encode()
def html_decode_helper(s):
return html.unescape(s.decode()).encode()
def _code_helper(args, func, copy=True):
if len(args) == 0:
s = clipboard_contents().encode()
print('Will decode:')
print(printable_data(s))
s = func(s)
if copy:
try:
copy_to_clipboard(s)
except Exception as e:
print('Result cannot be copied to the clipboard. Result not copied.')
raise e
return s
else:
s = func(args[0].encode())
if copy:
try:
copy_to_clipboard(s)
except Exception as e:
print('Result cannot be copied to the clipboard. Result not copied.')
raise e
return s
def base64_decode(client, args):
"""
Base64 decode a string.
If no string is given, will decode the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, base64_decode_helper))
def base64_encode(client, args):
"""
Base64 encode a string.
If no string is given, will encode the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, base64.b64encode))
def url_decode(client, args):
"""
URL decode a string.
If no string is given, will decode the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, url_decode_helper))
def url_encode(client, args):
"""
URL encode special characters in a string.
If no string is given, will encode the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, url_encode_helper))
def asciihex_decode(client, args):
"""
Decode an ascii hex string.
If no string is given, will decode the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, asciihex_decode_helper))
def asciihex_encode(client, args):
"""
Convert all the characters in a line to hex and combine them.
If no string is given, will encode the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, asciihex_encode_helper))
def html_decode(client, args):
"""
Decode an html encoded string.
If no string is given, will decode the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, html_decode_helper))
def html_encode(client, args):
"""
Encode a string and escape html control characters.
If no string is given, will encode the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, html_encode_helper))
def gzip_decode(client, args):
"""
Un-gzip a string.
If no string is given, will decompress the contents of the clipboard.
Results are copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, gzip_decode_helper))
def gzip_encode(client, args):
"""
Gzip a string.
If no string is given, will decompress the contents of the clipboard.
Results are NOT copied to the clipboard.
"""
print_maybe_bin(_code_helper(args, gzip_encode_helper, copy=False))
def base64_decode_raw(client, args):
"""
Same as base64_decode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, base64_decode_helper, copy=False))
def base64_encode_raw(client, args):
"""
Same as base64_encode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, base64.b64encode, copy=False))
def url_decode_raw(client, args):
"""
Same as url_decode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, url_decode_helper, copy=False))
def url_encode_raw(client, args):
"""
Same as url_encode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, url_encode_helper, copy=False))
def asciihex_decode_raw(client, args):
"""
Same as asciihex_decode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, asciihex_decode_helper, copy=False))
def asciihex_encode_raw(client, args):
"""
Same as asciihex_encode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, asciihex_encode_helper, copy=False))
def html_decode_raw(client, args):
"""
Same as html_decode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, html_decode_helper, copy=False))
def html_encode_raw(client, args):
"""
Same as html_encode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, html_encode_helper, copy=False))
def gzip_decode_raw(client, args):
"""
Same as gzip_decode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, gzip_decode_helper, copy=False))
def gzip_encode_raw(client, args):
"""
Same as gzip_encode but the output will never be printed as a hex dump and
results will not be copied. It is suggested you redirect the output
to a file.
"""
print(_code_helper(args, gzip_encode_helper, copy=False))
def unix_time_decode_helper(line):
unix_time = int(line.strip())
dtime = datetime.datetime.fromtimestamp(unix_time)
return dtime.strftime('%Y-%m-%d %H:%M:%S')
def unix_time_decode(client, args):
print(_code_helper(args, unix_time_decode_helper))
def http_auth_encode(client, args):
if len(args) != 2:
raise CommandError('Usage: http_auth_encode <username> <password>')
username, password = args
print(encode_basic_auth(username, password))
def http_auth_decode(client, args):
username, password = decode_basic_auth(args[0])
print(username)
print(password)
def load_cmds(cmd):
cmd.set_cmds({
'base64_decode': (base64_decode, None),
'base64_encode': (base64_encode, None),
'asciihex_decode': (asciihex_decode, None),
'asciihex_encode': (asciihex_encode, None),
'url_decode': (url_decode, None),
'url_encode': (url_encode, None),
'html_decode': (html_decode, None),
'html_encode': (html_encode, None),
'gzip_decode': (gzip_decode, None),
'gzip_encode': (gzip_encode, None),
'base64_decode_raw': (base64_decode_raw, None),
'base64_encode_raw': (base64_encode_raw, None),
'asciihex_decode_raw': (asciihex_decode_raw, None),
'asciihex_encode_raw': (asciihex_encode_raw, None),
'url_decode_raw': (url_decode_raw, None),
'url_encode_raw': (url_encode_raw, None),
'html_decode_raw': (html_decode_raw, None),
'html_encode_raw': (html_encode_raw, None),
'gzip_decode_raw': (gzip_decode_raw, None),
'gzip_encode_raw': (gzip_encode_raw, None),
'unixtime_decode': (unix_time_decode, None),
'httpauth_encode': (http_auth_encode, None),
'httpauth_decode': (http_auth_decode, None)
})
cmd.add_aliases([
('base64_decode', 'b64d'),
('base64_encode', 'b64e'),
('asciihex_decode', 'ahd'),
('asciihex_encode', 'ahe'),
('url_decode', 'urld'),
('url_encode', 'urle'),
('html_decode', 'htmld'),
('html_encode', 'htmle'),
('gzip_decode', 'gzd'),
('gzip_encode', 'gze'),
('base64_decode_raw', 'b64dr'),
('base64_encode_raw', 'b64er'),
('asciihex_decode_raw', 'ahdr'),
('asciihex_encode_raw', 'aher'),
('url_decode_raw', 'urldr'),
('url_encode_raw', 'urler'),
('html_decode_raw', 'htmldr'),
('html_encode_raw', 'htmler'),
('gzip_decode_raw', 'gzdr'),
('gzip_encode_raw', 'gzer'),
('unixtime_decode', 'uxtd'),
('httpauth_encode', 'hae'),
('httpauth_decode', 'had'),
])
