Merge pull request #8 from mj3052/master
Fixed authentication, added examples.
This commit is contained in:
mxgxw
commit
deae8836b4
5 changed files with 254 additions and 58 deletions
49
Dump.py
Executable file
49
Dump.py
Executable file
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@ -0,0 +1,49 @@
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import RPi.GPIO as GPIO
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import MFRC522
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import signal
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continue_reading = True
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# Capture SIGINT for cleanup when the script is aborted
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def end_read(signal,frame):
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global continue_reading
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print "Ctrl+C captured, ending read."
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continue_reading = False
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GPIO.cleanup()
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# Hook the SIGINT
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signal.signal(signal.SIGINT, end_read)
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# Create an object of the class MFRC522
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MIFAREReader = MFRC522.MFRC522()
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# This loop keeps checking for chips. If one is near it will get the UID and authenticate
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while continue_reading:
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# Scan for cards
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(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
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# If a card is found
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if status == MIFAREReader.MI_OK:
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print "Card detected"
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# Get the UID of the card
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(status,uid) = MIFAREReader.MFRC522_Anticoll()
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# If we have the UID, continue
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if status == MIFAREReader.MI_OK:
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# Print UID
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print "Card read UID: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(uid[3])
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# This is the default key for authentication
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key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
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# Select the scanned tag
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MIFAREReader.MFRC522_SelectTag(uid)
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# Dump the data
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MIFAREReader.MFRC522_DumpClassic1K(key, uid)
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# Stop
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MIFAREReader.MFRC522_StopCrypto1()
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66
MFRC522.py
Normal file → Executable file
66
MFRC522.py
Normal file → Executable file
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@ -1,6 +1,7 @@
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import RPi.GPIO as GPIO
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import spi
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import signal
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import time
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class MFRC522:
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NRSTPD = 22
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@ -290,24 +291,40 @@ class MFRC522:
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def MFRC522_Auth(self, authMode, BlockAddr, Sectorkey, serNum):
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buff = []
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# First byte should be the authMode (A or B)
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buff.append(authMode)
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# Second byte is the trailerBlock (usually 7)
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buff.append(BlockAddr)
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# Now we need to append the authKey which usually is 6 bytes of 0xFF
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i = 0
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while(i < len(Sectorkey)):
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buff.append(Sectorkey[i])
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i = i + 1
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i = 0
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while(i < len(serNum)):
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# Next we append the first 4 bytes of the UID
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while(i < 4):
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buff.append(serNum[i])
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i = i +1
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# Now we start the authentication itself
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(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_AUTHENT,buff)
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# Check if an error occurred
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if not(status == self.MI_OK):
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print "AUTH ERROR!!"
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if not (self.Read_MFRC522(self.Status2Reg) & 0x08) != 0:
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print "AUTH ERROR(status2reg & 0x08) != 0"
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# Return the status
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return status
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def MFRC522_StopCrypto1(self):
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self.ClearBitMask(self.Status2Reg, 0x08)
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def MFRC522_Read(self, blockAddr):
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recvData = []
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recvData.append(self.PICC_READ)
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@ -318,8 +335,6 @@ class MFRC522:
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(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, recvData)
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if not(status == self.MI_OK):
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print "Error while reading!"
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print "Got data size: "+str(backLen)
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i = 0
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if len(backData) == 16:
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print "Sector "+str(blockAddr)+" "+str(backData)
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@ -349,8 +364,18 @@ class MFRC522:
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if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A):
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print "Error while writing"
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if status == self.MI_OK:
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print "Data writen"
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print "Data written"
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def MFRC522_DumpClassic1K(self, key, uid):
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i = 0
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while i < 64:
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status = self.MFRC522_Auth(self.PICC_AUTHENT1A, i, key, uid)
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# Check if authenticated
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if status == self.MI_OK:
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self.MFRC522_Read(i)
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else:
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print "Authentication error"
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i = i+1
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def MFRC522_Init(self):
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GPIO.output(self.NRSTPD, 1)
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@ -366,36 +391,3 @@ class MFRC522:
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self.Write_MFRC522(self.TxAutoReg, 0x40)
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self.Write_MFRC522(self.ModeReg, 0x3D)
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self.AntennaOn()
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continue_reading = True
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# Capture SIGINT
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def end_read(signal,frame):
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global continue_reading
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print "Ctrl+C captured, ending read."
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continue_reading = False
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GPIO.cleanup() # Suggested by Marjan Trutschl
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signal.signal(signal.SIGINT, end_read)
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MIFAREReader = MFRC522()
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while continue_reading:
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(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
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if status == MIFAREReader.MI_OK:
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print "Card detected"
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(status,backData) = MIFAREReader.MFRC522_Anticoll()
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if status == MIFAREReader.MI_OK:
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print "Card read UID: "+str(backData[0])+","+str(backData[1])+","+str(backData[2])+","+str(backData[3])+","+str(backData[4])
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key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
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MIFAREReader.MFRC522_SelectTag(backData)
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status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 11, key, backData)
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if status == MIFAREReader.MI_OK:
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print "AUTH OK"
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else:
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print "AUTH ERROR"
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31
README.md
31
README.md
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@ -5,21 +5,26 @@ A small class to interface with the NFC reader Module MFRC522 on the Raspberry P
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This is a Python port of the example code for the NFC module MF522-AN.
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Pre Requisites
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==============
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You will need to install SPI-Py from lthiery from the following address:
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##Requirements
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This code requires you to have SPI-Py installed from the following repository:
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https://github.com/lthiery/SPI-Py
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More Info
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==============
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##Examples
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This repository includes a couple of examples showing how to read, write, and dump data from a chip. They are thoroughly commented, and should be easy to understand.
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For more information visit: http://fuenteabierta.teubi.co/
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## Pins
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You can use [this](http://i.imgur.com/y7Fnvhq.png) image for reference.
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Usage
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==============
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| Name | Pin # | Pin name |
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|------|-------|------------|
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| SDA | 24 | GPIO8 |
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| SCK | 23 | GPIO11 |
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| MOSI | 19 | GPIO10 |
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| MISO | 21 | GPIO9 |
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| IRQ | None | None |
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| GND | Any | Any Ground |
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| RST | 22 | GPIO25 |
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| 3.3V | 1 | 3V3 |
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Just run the following command:
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sudo python MFRC522.py
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##Usage
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Import the class by importing MFRC522 in the top of your script. For more info see the examples.
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56
Read.py
Executable file
56
Read.py
Executable file
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import RPi.GPIO as GPIO
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import MFRC522
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import signal
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continue_reading = True
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# Capture SIGINT for cleanup when the script is aborted
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def end_read(signal,frame):
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global continue_reading
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print "Ctrl+C captured, ending read."
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continue_reading = False
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GPIO.cleanup()
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# Hook the SIGINT
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signal.signal(signal.SIGINT, end_read)
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# Create an object of the class MFRC522
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MIFAREReader = MFRC522.MFRC522()
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# This loop keeps checking for chips. If one is near it will get the UID and authenticate
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while continue_reading:
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# Scan for cards
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(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
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# If a card is found
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if status == MIFAREReader.MI_OK:
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print "Card detected"
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# Get the UID of the card
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(status,uid) = MIFAREReader.MFRC522_Anticoll()
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# If we have the UID, continue
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if status == MIFAREReader.MI_OK:
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# Print UID
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print "Card read UID: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(uid[3])
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# This is the default key for authentication
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key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
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# Select the scanned tag
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MIFAREReader.MFRC522_SelectTag(uid)
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# Authenticate
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status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
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# Check if authenticated
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if status == MIFAREReader.MI_OK:
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MIFAREReader.MFRC522_Read(8)
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MIFAREReader.MFRC522_StopCrypto1()
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else:
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print "Authentication error"
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# Make sure to stop scanning for cards
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continue_reading = false
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94
Write.py
Executable file
94
Write.py
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@ -0,0 +1,94 @@
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import RPi.GPIO as GPIO
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import MFRC522
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import signal
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continue_reading = True
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# Capture SIGINT for cleanup when the script is aborted
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def end_read(signal,frame):
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global continue_reading
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print "Ctrl+C captured, ending read."
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continue_reading = False
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GPIO.cleanup()
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# Hook the SIGINT
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signal.signal(signal.SIGINT, end_read)
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# Create an object of the class MFRC522
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MIFAREReader = MFRC522.MFRC522()
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# This loop keeps checking for chips. If one is near it will get the UID and authenticate
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while continue_reading:
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# Scan for cards
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(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
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# If a card is found
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if status == MIFAREReader.MI_OK:
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print "Card detected"
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# Get the UID of the card
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(status,uid) = MIFAREReader.MFRC522_Anticoll()
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# If we have the UID, continue
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if status == MIFAREReader.MI_OK:
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# Print UID
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print "Card read UID: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(uid[3])
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# This is the default key for authentication
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key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
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# Select the scanned tag
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MIFAREReader.MFRC522_SelectTag(uid)
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# Authenticate
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status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
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print "\n"
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# Check if authenticated
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if status == MIFAREReader.MI_OK:
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# Variable for the data to write
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data = []
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# Fill the data with 0xFF
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for x in range(0,16):
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data.append(0xFF)
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print "Sector 8 looked like this:"
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# Read block 8
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MIFAREReader.MFRC522_Read(8)
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print "\n"
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print "Sector 8 will now be filled with 0xFF:"
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# Write the data
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MIFAREReader.MFRC522_Write(8, data)
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print "\n"
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print "It now looks like this:"
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# Check to see if it was written
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MIFAREReader.MFRC522_Read(8)
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print "\n"
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data = []
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# Fill the data with 0x00
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for x in range(0,16):
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data.append(0x00)
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print "Now we fill it with 0x00:"
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MIFAREReader.MFRC522_Write(8, data)
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print "\n"
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print "It is now empty:"
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# Check to see if it was written
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MIFAREReader.MFRC522_Read(8)
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print "\n"
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# Stop
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MIFAREReader.MFRC522_StopCrypto1()
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# Make sure to stop reading for cards
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continue_reading = False
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else:
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print "Authentication error"
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