This gem brings some NFC functionality for Ruby programming language. It allows you to:
- Read and modify contents of Mifare tags
- Send APDU commands to Android HCE or Blackberry VTE devices
- Communicate with dual-interface smart cards like Master Card PayPass or Visa payWave cards
-
Install libusb first. For Ubuntu run:
apt-get install libusb-dev -
Download and install libnfc. Ruby-nfc currently works with 1.7.x branch
# tar xjvf libnfc-1.7.1.tar.bz2 # cd libnfc-1.7.1/ # ./configure # make && make installYou may need to copy some system files from libnfc tarball:
sudo cp ./contrib/linux/blacklist-libnfc.conf /etc/modprobe.d/ sudo cp ./contrib/udev/42-pn53x.rules /etc/udev/rules.d/ -
Download and install libfreefare:
# git clone https://github.com/nfc-tools/libfreefare.git # cd libfreefare # autoreconf -vis # ./configure && make && make install -
Look at the lsusb output and make sure that your reader is present in 42-pn53x.rules file
-
Install the appropriate driver for your NFC reader (if required)
-
If your reader is plugged in unplug it and plug it in again. If you run the example below and get "Device or resource busy" error then you need to reboot your system before you can continue.
-
If you getting "Unable to claim USB interface (Operation not permitted)" error then changing MODE from 0664 to 0666 in 42-pn53x.rules file may help
gem install ruby-nfc
require 'ruby-nfc'
require 'logger'
$logger = Logger.new(STDOUT)
def p(str)
$logger.debug str
end
p "Library version: #{NFC.version}"
readers = NFC::Reader.all
p "Available readers: #{readers}"
# The order of tag types in poll arguments defines priority of tag types
readers[0].poll(IsoDep::Tag, Mifare::Classic::Tag, Mifare::Ultralight::Tag) do |tag|
begin
p "Applied #{tag.class.name}: #{tag}"
case tag
when Mifare::Classic::Tag
if tag.auth(4, :key_a, "FFFFFFFFFFFF")
# Mifare::Classic::Tag.read method reads contents of last authenticated
# block
p "Contents of block 0x04: #{tag.read.unpack('H*').pop}"
# Making random 16-byte string
rnd = Array.new(16).map{rand(255)}.pack('C*')
tag.write(rnd)
p "New value: #{rnd.unpack('H*').pop}"
tag.processed!
else
p "Authentication failed!"
end
when Mifare::Ultralight::Tag
p "Page 1: #{tag.read(1).unpack('H*').pop}"
tag.processed!
when IsoDep::Tag
tag.select! ["F75246544101"].pack('H*')
# sending APDU command to tag using send_apdu method
apdu = ['A00D010018B455CAF0F331AF703EFA2E2D744EC7E22AA64076CD19F6D0'].pack('H*')
p tag.send_apdu(apdu)
# sending APDU command with "<<" operator which is alias to send_apdu
response = tag << apdu
p "status word: #{response.sw.to_s(16)} data: #{response.data.unpack('H*').pop}"
tag.processed!
end
rescue Exception => e
p e
end
endThis example should provide similar output when you apply your tags to the NFC-reader:
D, [2014-10-15T23:21:48.965893 #9846] DEBUG -- : Library version: 1.7.1
D, [2014-10-15T23:21:49.221798 #9846] DEBUG -- : Available readers: [acr122_usb:001:009]
D, [2014-10-15T23:21:53.393871 #9846] DEBUG -- : Applied IsoDep::Tag: a0d98978
D, [2014-10-15T23:21:53.507046 #9846] DEBUG -- : AEEE833D6A26476221290C3E4978290CCE67422257AA37FEDECA655FE7C67A5636669529E676A7C53FA51B9AF3AE62E631B6CBEBD4A65228A2FBF9CFE8B860E5EFC69000
D, [2014-10-15T23:21:53.597682 #9846] DEBUG -- : status word: 9000 data: aeee833d6a26476221290c3e4978290cce67422257aa37fedeca655fe7c67a5636669529e676a7c53fa51b9af3ae62e631b6cbebd4a65228a2fbf9cfe8b860e5efc6
D, [2014-10-15T23:22:03.037690 #9846] DEBUG -- : Applied Mifare::Classic::Tag: 25161b49 Infineon Mifare Classic 1k SAK: 0x88
D, [2014-10-15T23:22:03.058840 #9846] DEBUG -- : Contents of block 0x04: 8ad53ef7f0f4055bf218b418a3fc884b
D, [2014-10-15T23:22:03.075083 #9846] DEBUG -- : New value: 57597505950dc90e569b8bee19852e6e
D, [2014-10-15T23:22:06.436528 #9846] DEBUG -- : Applied Mifare::Classic::Tag: 25161b49 Infineon Mifare Classic 1k SAK: 0x88
D, [2014-10-15T23:22:06.457830 #9846] DEBUG -- : Contents of block 0x04: 57597505950dc90e569b8bee19852e6e
D, [2014-10-15T23:22:06.473809 #9846] DEBUG -- : New value: 05f42ee777e08631cffbb5c8edadbb6d
D, [2014-10-15T23:22:10.001636 #9846] DEBUG -- : Applied Mifare::Classic::Tag: 25161b49 Infineon Mifare Classic 1k SAK: 0x88
D, [2014-10-15T23:22:10.022172 #9846] DEBUG -- : Contents of block 0x04: 05f42ee777e08631cffbb5c8edadbb6d
D, [2014-10-15T23:22:10.039478 #9846] DEBUG -- : New value: f31a513ff3c6cad190fdd570e67259b1
D, [2014-10-15T23:22:13.365357 #9846] DEBUG -- : Applied Mifare::Ultralight::Tag: 04a42572373080 Mifare UltraLight SAK: 0x0
D, [2014-10-15T23:22:13.376352 #9846] DEBUG -- : Page 1: 72373080
D, [2014-10-15T23:22:22.158846 #9846] DEBUG -- : Applied Mifare::Classic::Tag: bde74d1d Mifare Classic 4k SAK: 0x18
D, [2014-10-15T23:22:22.180474 #9846] DEBUG -- : Contents of block 0x04: 00000000000000000000000000000000
D, [2014-10-15T23:22:22.195963 #9846] DEBUG -- : New value: 8a5b666d6b53bb7c3c52e3d2a076da8b
D, [2014-10-15T23:22:27.187482 #9846] DEBUG -- : Applied Mifare::Classic::Tag: bde74d1d Mifare Classic 4k SAK: 0x18
D, [2014-10-15T23:22:27.208464 #9846] DEBUG -- : Contents of block 0x04: 8a5b666d6b53bb7c3c52e3d2a076da8b
D, [2014-10-15T23:22:27.223680 #9846] DEBUG -- : New value: 35adbc1378afd3d48af367809fd4491d
D, [2014-10-15T23:22:31.756429 #9846] DEBUG -- : Applied Mifare::Classic::Tag: bde74d1d Mifare Classic 4k SAK: 0x18
D, [2014-10-15T23:22:31.777233 #9846] DEBUG -- : Contents of block 0x04: 35adbc1378afd3d48af367809fd4491d
D, [2014-10-15T23:22:31.792688 #9846] DEBUG -- : New value: 46b613dae824cd84363340a45805f9a4
To see additional debug info from libnfc run your program as follows:
LIBNFC_LOG_LEVEL=3 ruby examples/listen.rb
The MIT License (MIT)
Copyright (c) 2014 Maxim M. Chechel [email protected]
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