wip

* rfid filter and message passing to ipc

busunit-PIU/scripts/magstripe_manager

@@ -0,0 +1,29 @@
+#!/bin/bash
+#
+# Copyright (c) 2019 Clementine Computing LLC.
+#
+# This file is part of PopuFare.
+#
+# PopuFare is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# PopuFare is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with PopuFare.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+# Mostly for debugging.
+# A simple script to broadcast messages on the `ipc_server` to indicate
+# a mag token has been swiped.
+#
+
+stdbuf -eL -oL /home/pi/bin/capture-mag-hid | \
+  xargs -n1 -I{} bash -c " /home/pi/bin/format_debug_msg.py TOKEN_MAG '{}' | /home/pi/bin/debug_client -s " | \
+  tee -a /tmp/mag.log
+

busunit-PIU/scripts/rfid_filter

@@ -0,0 +1,142 @@
+#!/usr/bin/python
+#
+# Copyright (c) 2019 Clementine Computing LLC.
+#
+# This file is part of PopuFare.
+#
+# PopuFare is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# PopuFare is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with PopuFare.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+# The output format is `<bit-length>|<payload>`, where the
+# <bit-length> and <payload> field are in ascii hex.
+#
+# Input is expected to come from stdin and as the result of the
+# `proxmark3` LUA script setup for low frequency read.
+# Input text is seached for a matching prefix of:
+#
+#   #db# TAG ID:
+#
+# Once found, the ascii hex string is read, it's converted to binary
+# and parsed.
+# The first run of two '1' bits is removed from the 'left'.
+# The remaing number of bits is the bit length and the remaining
+# bit string is converted back to ascii.
+# Note the 'paylaod' can be a non exact multiple of 4 or 2.
+#
+# For example, if the following string was found:
+#
+#     #db# TAG ID: 200712054a (677)
+#
+# This is converted to:
+#
+#    2    0    0      7     1    2    0    5    4    a
+# 0010 0000 0000  01 11  0001 0010 0000 0101 0100 1010
+#                   |                                 |
+#                   -----------------------------------
+#                               26 bits
+# 
+# To evenually give the final result:
+#
+#    23|43F6311B2
+#
+
+
+import os
+import re
+import sys
+import time
+
+rate_limit_ms = 3000.0
+
+def convert_tagid(s):
+  binstr = ""
+  for c in s:
+    v = int(c, 16)
+
+    _b = bin(int(c, 16))[2:]
+
+    __b = "0"*(4-len(_b)) + _b
+    binstr = binstr + __b
+
+    #print("c:", c, "v:", v, "_b:", _b, "binstr:", binstr)
+
+  #print("binstr:", binstr)
+
+  f, s,  = -1, -1
+  for idx, b in enumerate(binstr):
+    if (b == '1') and (f < 0):
+      f = idx
+    elif (b == '1') and (s < 0):
+      s = idx
+      break
+
+  #print("first:", f, "second:", s)
+
+  filt_binstr = binstr[s+1:]
+  n = len(filt_binstr)
+  bitlen = n
+  fin_hex = ""
+  while n >= 4:
+
+    _b = filt_binstr[n-4:n]
+    fin_hex = hex(int(_b, 2))[2:] + fin_hex
+
+    #print("n:", n, "_b:", _b, "fin_hex:", fin_hex)
+    
+    n -= 4
+  if n>0:
+    _b = filt_binstr[0:n]
+    fin_hex = hex(int(_b, 2))[2:] + fin_hex
+
+    #print("n:", n, "_b:", _b, "fin_hex:", fin_hex)
+
+
+  #print("bitlen:", bitlen)
+  #print("binstr:", binstr)
+  #print("fin_hex:", fin_hex)
+
+  return hex(bitlen)[2:] + "|" + fin_hex
+
+
+t_prv = time.time()*1000.0
+t_now = t_prv
+
+last_tok = ""
+
+while True:
+  line = sys.stdin.readline()
+  line = line.strip()
+
+  m = re.match("#db# TAG ID: ([^ ]*)", line)
+  if m:
+    #print("match:", m.group(1))
+
+    t_now = time.time()*1000.0
+
+    tok = convert_tagid(m.group(1)).upper()
+    if last_tok != tok:
+      print(tok)
+      sys.stdout.flush()
+      t_prv = t_now
+      last_tok = tok
+    elif (t_now - t_prv) >= rate_limit_ms:
+      print(tok)
+      sys.stdout.flush()
+      t_prv = t_now
+      last_tok = tok
+    else:
+      #print("#ignore")
+      pass
+
+

busunit-PIU/scripts/rfid_manager

@@ -0,0 +1,35 @@
+#!/bin/bash
+#
+# Copyright (c) 2019 Clementine Computing LLC.
+#
+# This file is part of PopuFare.
+#
+# PopuFare is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# PopuFare is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with PopuFare.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+# Mostly for debugging.
+# A simple script to broadcast messages on the `ipc_server` to indicate
+# an rfid token has been detected
+#
+
+BASEDIR=/home/pi
+d=$BASEDIR/bin
+
+stdbuf -eL -oL $d/proxmark3 /dev/ttyACM0 -l proxmark3-lf-hid-read.lua | \
+  stdbuf -eL -oL tee -a /tmp/rfid_raw.log | \
+  $d/rfid_filter | \
+  xargs -n1 -I{} bash -c " $d/format_debug_msg.py TOKEN_RFID '{}' | $d/debug_client -s " | \
+  tee -a /tmp/rfid.log
+
+