libscrc

libscrc is a library for calculating CRC3 CRC4 CRC5 CRC6 CRC7 CRC8 CRC16 CRC24 CRC32 CRC64 CRC82.

CRCx	CRC8	CRC16	CRC24	CRC32	CRC64
CRC3-GSM	INTEL	MODBUS	BLE	FSC	GO-ISO
CRC3-ROHC	BCC	IBM	OPENPGP	CRC32	ECMA182
CRC4-ITU	LRC	XMODEM	LTE-A	MPEG2	WE
CRC5-ITU	MAXIM8	CCITT	LTE-B	ADLER32	XZ64
CRC5-EPC	ROHC	KERMIT	OS9	FLETCHER32
CRC5-USB	ITU8	MCRF4XX	FLEXRAY-A	POSIX
CRC6-ITU	CRC8	SICK	FLEXRAY-B	BZIP2
CRC6-GSM	SUM8	DNP	INTERLAKEN	JAMCRC
CRC6-DARC	FLETCHER8	X25	CRC24	AUTOSAR
CRC7	SMBUS	USB		C / ISCSI
CRC7-MMC	AUTOSAR	MAXIM16		D / BASE91-D
CRC7-UMTS	LTE	DECT(R/X)		Q / AIXM
CRC7-ROHC	SAE-J1850	TCP/UDP		XFER
	I-CODE	CDMA2000		CKSUM
CAN15	GSM-A	FLETCHER16		XZ32
CAN17	NRSC-5	EPC16		AAL5
CAN21	WCDMA	PROFIBUS		ISO-HDLC
	BLUETOOTH	BUYPASS		PKZIP
CRC10-ATM	DVB-S2	GENIBUS		ADCCP
CRC13-BBC	EBU	GSM16		V-42
MPT1327	DARC	RIELLO		STM32
CDMA2000	MIFARE	OPENSAFETY		ECMXF
	LIN1.3	EN13757
	LIN2.x	CMS		CRC30-CDMA	DARC82
	ID8			CRC31-PHILIPS
	NMEA
	MODBUS_ASC

Installation

1. Compile and install the library

#pip3 install libscrc

​ or

#python3 setup.py build
#python3 setup.py install

You will need the administrative privileges to execute the last command.

2. Cross-compile ( Linux for ARM )

#export PATH=/mnt/tools/gcc-linaro-6.2.1/bin/:$PATH
#export CROSS_COMPILE=arm-linux-gnueabihf-
#export CC='${CROSS_COMPILE}gcc -pthread'
#export LDSHARED='${CROSS_COMPILE}gcc -shared'
#export CFLAGS='-I/usr/include/python3 -I/usr/include/'

#python3 setup.py bdist_wheel
#
#auditwheel repair dist/libscrc-1.8.1-cp311-cp311-linux_x86_64.whl
#cd wheelhouse
#ls 
#libscrc-1.8.1-cp311-cp311-manylinux_2_5_x86_64.manylinux1_x86_64.whl

3. After installation you can run unit tests to make sure that the library works fine. Execute

#python3 -m libscrc.test.modbus
#python3 -m libscrc.test.crc8
#python3 -m libscrc.test.crcx
#python3 -m libscrc.test.canx
#python3 -m libscrc.test.crc16
#python3 -m libscrc.test.crc24
#python3 -m libscrc.test.crc32
#python3 -m libscrc.test.crc64

Usage

In Python 3

import libscrc
crc16 = libscrc.modbus(b'1234')      # Calculate ASCII of modbus(rtu)
crc16 = libscrc.modbus(b'\x01\x02')  # Calculate HEX of modbus(rtu)
crc16 = libscrc.modbus(bytearray( [ 0x01, 0x02 ] ))

You can also calculate CRC gradually ( v1.4+ )

import libscrc
crc16 = libscrc.xmodem(b'1234')
crc16 = libscrc.xmodem(b'5678', crc16)

Example

1. CRCx

crc3 = libscrc.gsm3(b'1234')
crc3 = libscrc.rohc3(b'1234')
crc4 = libscrc.itu4(b'1234')
crc4 = libscrc.g_704(b'1234')
crc4 = libscrc.interlaken4(b'1234')
crc5 = libscrc.itu5(b'1234')
crc5 = libscrc.epc(b'1234')
crc5 = libscrc.usb5(b'1234')
crc6 = libscrc.itu6(b'1234')
crc6 = libscrc.gsm6(b'1234')
crc6 = libscrc.darc6(b'1234')
crc7 = libscrc.mmc(b'1234')
crc7 = libscrc.crc7(b'1234')
crc7 = libscrc.umts7(b'1234')
crc7 = libscrc.rohc7(b'1234')

crc10 = libscrc.atm10(b'1234')
crc10 = libscrc.gsm10(b'1234')
crc10 = libscrc.crc10_cdma2000(b'1234')
crc11 = libscrc.umts11(b'1234')
crc11 = libscrc.flexray11(b'1234')
crc12 = libscrc.umts12(b'1234')
crc12 = libscrc.crc12_3gpp(b'1234')
crc12 = libscrc.dect12(b'1234')
crc12 = libscrc.crc12(b'1234')
crc12 = libscrc.gsm12(b'1234')
crc12 = libscrc.crc12_cdma2000(b'1234')
crc13 = libscrc.bbc13(b'1234')
crc14 = libscrc.darc14(b'1234')
crc15 = libscrc.mpt1327(b'1234')
crc15 = libscrc.can15(b'1234')

crc17 = libscrc.can17(b'1234')
crc21 = libscrc.can21(b'1234')

crc30 = libscrc.cdma(b'1234')
crc31 = libscrc.philips(b'1234')

crc40 = libscrc.gsm40(b'1234')

crc82 = libscrc.darc82(b'1234')

2. CRC8

crc8 = libscrc.intel(b'1234')
crc8 = libscrc.bcc(b'1234')  
crc8 = libscrc.lrc(b'1234')  
crc8 = libscrc.maxim8(b'1234')
crc8 = libscrc.rohc(b'1234')
crc8 = libscrc.itu8(b'1234')
crc8 = libscrc.crc8(b'1234')
crc8 = libscrc.smbus(b'1234')
crc8 = libscrc.autosar8(b'1234')
crc8 = libscrc.lte8(b'1234')
crc8 = libscrc.sae_j1850(b'1234')
crc8 = libscrc.icode8(b'1234')
crc8 = libscrc.gsm8_a(b'1234')
crc8 = libscrc.nrsc_5(b'1234')
crc8 = libscrc.wcdma8(b'1234')
crc8 = libscrc.bluetooth(b'1234')
crc8 = libscrc.dvb_s2(b'1234')
crc8 = libscrc.ebu8(b'1234')
crc8 = libscrc.darc8(b'1234')
crc8 = libscrc.opensafety8(b'1234')
crc8 = libscrc.i432_1(b'1234')
crc8 = libscrc.mifare_mad(b'1234')
crc8 = libscrc.tech_3250(b'1234')
crc8 = libscrc.aes8(b'1234')

# LIN Protocol 1.3 (CLASSIC)
# Frame ID : 0x15	DATA : 0x5B, 0x67
crc8 = libscrc.lin(bytes([0x15, 0x5B, 0x67]))
# LIN Protocol 2.x (ENHANCED)
# Frame ID : 0x15
# DATA : 0x5B, 0x67, 0x72, 0xAF, 0x5B
crc8 = libscrc.lin2x(bytes([0x15, 0x5B, 0x67, 0x72, 0xAF, 0x5B]))

crc8 = libscrc.id8(b'21020020210229117')		# ID check code of China
crc8 = libscrc.nmea(b'$PFEC,GPint,RMC06*')		# National Marine Electronics Association

# Return value is bytes (b'FA')
crc8 = libscrc.modbus_asc(b'010300010001')      # Modbus(ASCII) checksum.

3. CRC16

crc16 = libscrc.ibm(b'1234')            # poly=0xA001 (default Reversed)
crc16 = libscrc.ibm(b'1234', 0x8005)    # poly=0x8005 (Normal)
crc16 = libscrc.modbus(b'1234')			# Modbus(RTU) checksum
crc16 = libscrc.xmodem(b'1234')
crc16 = libscrc.zmodem(b'1234')
crc16 = libscrc.ccitt(b'1234')
crc16 = libscrc.ccitt_aug(b'1234')
crc16 = libscrc.ccitt_true(b'1234')
crc16 = libscrc.ccitt_false(b'1234')
crc16 = libscrc.kermit(b'1234')
crc16 = libscrc.mcrf4xx(b'1234')
crc16 = libscrc.sick(b'1234')
crc16 = libscrc.mcrf4xx(b'1234')
crc16 = libscrc.dnp(b'1234')
crc16 = libscrc.x25(b'1234')
crc16 = libscrc.usb16(b'1234')
crc16 = libscrc.maxim16(b'1234')
crc16 = libscrc.dect_r(b'1234')
crc16 = libscrc.dect_x(b'1234')

data  = b'\x45\x00\x00\x3c\x00\x00\x00\x00\x40\x11\x00\x00\xc0\xa8\x2b\xc3\x08\x08\x08\x08\x11'
crc16 = libscrc.tcp( data )             # 13933
crc16 = libscrc.udp( data )             # 13933

# init=0xFFFF(default)
# xorout=0x0000(default)
crc16 = libscrc.hacker16( b'123456789', poly=0x8005 )
crc16 = libscrc.hacker16( b'123456789', poly=0x8005, init=0xFFFF, xorout=0x0000, refin=True, refout=True )

crc16 = libscrc.epc16(b'1234')		# RFID EPC(CRC16-PC-EPC)
crc16 = libscrc.profibus(b'1234')
crc16 = libscrc.buypass(b'1234')
crc16 = libscrc.genibus(b'1234')
crc16 = libscrc.gsm16(b'1234')
crc16 = libscrc.riello(b'1234')

crc16 = libscrc.crc16_a(b'1234')
crc16 = libscrc.cdma2000(b'1234')
crc16 = libscrc.teledisk(b'1234')
crc16 = libscrc.tms37157(b'1234')
crc16 = libscrc.en13757(b'1234')
crc16 = libscrc.t10_dif(b'1234')
crc16 = libscrc.dds_110(b'1234')
crc16 = libscrc.lj1200(b'1234')
crc16 = libscrc.opensafety_a(b'1234')
crc16 = libscrc.opensafety_b(b'1234')

crc16 = libscrc.arc(b'1234')
crc16 = libscrc.lha(b'1234')
crc16 = libscrc.cms(b'1234')
crc16 = libscrc.darc(b'1234')
crc16 = libscrc.epc_c1g2(b'1234')
crc16 = libscrc.icode16(b'1234')
crc16 = libscrc.ibm_3740(b'1234')
crc16 = libscrc.autosar16(b'1234')
crc16 = libscrc.ibm_sdlc(b'1234')
crc16 = libscrc.iso_hdlc16(b'1234')
crc16 = libscrc.iec14443_3_b(b'1234')
crc16 = libscrc.iec14443_3_a(b'1234')
crc16 = libscrc.v41_lsb(b'1234')
crc16 = libscrc.v41_msb(b'1234')
crc16 = libscrc.spi_fujitsu(b'1234')
crc16 = libscrc.umts(b'1234')
crc16 = libscrc.verifone(b'1234')
crc16 = libscrc.acorn(b'1234')
crc16 = libscrc.lte16(b'1234')
crc16 = libscrc.nrsc5(b'1234')

4. CRC24

crc24 = libscrc.ble(b'1234')
crc24 = libscrc.flexraya(b'1234')
crc24 = libscrc.flexrayb(b'1234')
crc24 = libscrc.openpgp(b'1234')
crc24 = libscrc.lte_a(b'1234')
crc24 = libscrc.lte_b(b'1234')
crc24 = libscrc.os9(b'1234')
crc24 = libscrc.interlaken(b'1234')
crc24 = libscrc.crc24(b'1234')

5. CRC32

crc32 = libscrc.fsc(b'1234')            # Ethernet frame sequence (FSC)
crc32 = libscrc.mpeg2(b'1234')          # MPEG2
crc32 = libscrc.crc32(b'1234')          # WinRAR, File

# init=0x00000000(default)
# xorout=0xFFFFFFFF(default)
crc32 = libscrc.hacker32( b'123456789', poly=0x04C11DB7 )
crc32 = libscrc.hacker32( b'123456789', poly=0x04C11DB7, init=0, xorout=0xFFFFFFFF, refin=True, refout=True )

crc32 = libscrc.posix(b'1234')
crc32 = libscrc.bzip2(b'1234')
crc32 = libscrc.jamcrc(b'1234')
crc32 = libscrc.autosar(b'1234')
crc32 = libscrc.crc32_c(b'1234')
crc32 = libscrc.crc32_d(b'1234')
crc32 = libscrc.crc32_q(b'1234')
crc32 = libscrc.xfer(b'1234')
crc32 = libscrc.aixm(b'1234')
crc32 = libscrc.base91_d(b'1234')
crc32 = libscrc.cksum(b'1234')
crc32 = libscrc.base91_c(b'1234')
crc32 = libscrc.iscsi(b'1234')
crc32 = libscrc.iso_hdlc32(b'1234')
crc32 = libscrc.xz32(b'1234')
crc32 = libscrc.pkzip(b'1234')
crc32 = libscrc.adccp(b'1234')
crc32 = libscrc.v_42(b'1234')
crc32 = libscrc.aal5(b'1234')
crc32 = libscrc.stm32(b'1234')				# STM32 hardware calculate CRC32
crc32 = libscrc.ecmxf(b'1234')				# ECMXF

6. CRC64

crc64 = libscrc.iso(b'1234')
crc64 = libscrc.ecma182(b'1234')
crc64 = libscrc.we(b'1234')
crc64 = libscrc.xz64(b'1234')

# init=0x0000000000000000L(default)
# xorout=0x0000000000000000(default)
crc64 = libscrc.hacker64(b'123456789', poly=0x42F0E1EBA9EA3693, init=0, xorout=0, refin=False, refout=False )

7.CRC82

crc82 = libscrc.darc82(b'123456789')

NOTICE

• Revert gradually calculating function v1.4+ (2020-08-04)

V1.8.1 (2022-08-18)

---

• PyArg_ParseTuple() and formats which use # require the PY_SSIZE_T_CLEAN macro since python 3.10

V1.8 (2022-03-04)

---

New add modbus (ASCII) LRC checksum.

1. CRC8 -> libscrc.modbus_asc()

V1.7 (2021-06-07)

---

• Optimized code.

1. New add CRC8 -> libscrc.id8() and libscrc.nmea()
2. Update gradually calculate functions ( CRCx -> libscrc.umts12() libscrc.crc12_3gpp() )
3. Fixed Issues #8

V1.6(2021-01-18)

---

1. New add CRC32 -> libscrc.stm32()

2. New add CRC8 -> libscrc.lin() and libscrc.lin2x()

V1.4(2020-08-04)

---

• Revert gradually calculating function. ( Fixed Issues #4 )

• Optimized code.

  Gradually calculate invalid functions(TODO):

  1. CRCx -> libscrc.umts12() libscrc.crc12_3gpp()
  2. CRC8 -> libscrc.intel() libscrc.lrc()
  3. CRC16 -> libscrc.sick() libscrc.udp() libscrc.tcp() libscrc.fletcher16()
  4. CRC32 -> libscrc.fletcher32()

V1.1(2020-04-20)

---

• New crc24 ( ble \ flexraya \ flexrayb \ openpgp \ lte_a \ lte_b \ os9 \ interlaken )

V1.0 (2020-03-23)

---

• New hacker8 \ hacker16 \ hacker32 \ hacker64
• New FLETCHER8 \ FLETCHER16 \ FLETCHER32

V0.1.5 (2017-09-22)

---

• New CRC4-ITU Poly = 0x03 Initial = 0x00 Xorout=0x00 Refin=True Refout=True
• New CRC5-ITU Poly = 0x15 Initial = 0x00 Xorout=0x00 Refin=True Refout=True
• New CRC5-EPC Poly = 0x09 Initial = 0x09 Xorout=0x00 Refin=False Refout=False
• New CRC5-USB Poly = 0x05 Initial = 0x1F Xorout=0x1F Refin=True Refout=True
• New CRC6-ITU Poly = 0x03 Initial = 0x00 Xorout=0x00 Refin=True Refout=True
• New CRC7-MMC Poly = 0x09 Initial = 0x00 Xorout=0x00 Refin=False Refout=False

V0.1.4 (2017-09-21)

---

• New CRC8-MAXIM8 Poly = 0x31 Initial = 0x00 Xorout=0x00 Refin=True Refout=True
• New CRC8-ROHC Poly = 0x07 Initial = 0xFF Xorout=0x00 Refin=True Refout=True
• New CRC8-ITU Poly = 0x07 Initial = 0x00 Xorout=0x55 Refin=False Refout=False
• New CRC8-CRC8 Poly = 0x07 Initial = 0x00 Xorout=0x00 Refin=False Refout=False

V0.1.3 (2017-09-19)

---

• New CRC16-X25
• New CRC16-USB
• New CRC16-MAXIM16
• New CRC16-CCITT_FALSE
• New CRC16-DECT

Bugfixes

• Calculate CRC16-IBM of poly = 0x8005 is ERROR.

V0.1.2 (2017-08-22)

---

Platform Support

• Win32
• Linux_x86_64
• MacOSX_10_6_intel
• ARMv7 (Toradex Ixora iMX6 Linux-4.1.41)

Bugfixes

• Coding C99 standard.
• Python/C API parsing arguments type error in linux.

V0.1.1 (2017-08-20)

---

• New CRC16-DNP and CRC16-SICK