Skip to main content

Calculation library for CRCs and checksums

Project description

The crccheck.crc module implements all CRCs listed in the Catalogue of parametrised CRC algorithms:

CRC-3/GSM, CRC-3/ROHC, CRC-4/G-704, CRC-4/ITU, CRC-4/INTERLAKEN, CRC-5/EPC-C1G2, CRC-5/EPC, CRC-5/G-704, CRC-5/ITU, CRC-5/USB, CRC-6/CDMA2000-A, CRC-6/CDMA2000-B, CRC-6/DARC, CRC-6/G-704, CRC-6/ITU, CRC-6/GSM, CRC-7/MMC, CRC-7, CRC-7/ROHC, CRC-7/UMTS, CRC-8/AUTOSAR, CRC-8/BLUETOOTH, CRC-8/CDMA2000, CRC-8/DARC, CRC-8/DVB-S2, CRC-8/GSM-A, CRC-8/GSM-B, CRC-8/I-432-1, CRC-8/ITU, CRC-8/I-CODE, CRC-8/LTE, CRC-8/MAXIM-DOW, CRC-8/MAXIM, DOW-CRC, CRC-8/MIFARE-MAD, CRC-8/NRSC-5, CRC-8/OPENSAFETY, CRC-8/ROHC, CRC-8/SAE-J1850, CRC-8/SMBUS, CRC-8, CRC-8/TECH-3250, CRC-8/AES, CRC-8/EBU, CRC-8/WCDMA, CRC-10/ATM, CRC-10, CRC-10/I-610, CRC-10/CDMA2000, CRC-10/GSM, CRC-11/FLEXRAY, CRC-11, CRC-11/UMTS, CRC-12/CDMA2000, CRC-12/DECT, CRC-12-X, CRC-12/GSM, CRC-12/UMTS, CRC-12/3GPP, CRC-13/BBC, CRC-14/DARC, CRC-14/GSM, CRC-15/CAN, CRC-15, CRC-15/MPT1327, CRC-16/ARC, ARC, CRC-16/LHA, CRC-IBM, CRC-16/CDMA2000, CRC-16/CMS, CRC-16/DDS-110, CRC-16/DECT-R, R-CRC-16, CRC-16/DECT-X, X-CRC-16, CRC-16/DNP, CRC-16/EN-13757, CRC-16/GENIBUS, CRC-16/DARC, CRC-16/EPC, CRC-16/EPC-C1G2, CRC-16/I-CODE, CRC-16/GSM, CRC-16/IBM-3740, CRC-16/AUTOSAR, CRC-16/CCITT-FALSE, CRC-16/IBM-SDLC, CRC-16/ISO-HDLC, CRC-16/ISO-IEC-14443-3-B, CRC-16/X-25, CRC-B, X-25, CRC-16/ISO-IEC-14443-3-A, CRC-A, CRC-16/KERMIT, CRC-16/CCITT, CRC-16/CCITT-TRUE, CRC-16/V-41-LSB, CRC-CCITT, KERMIT, CRC-16/LJ1200, CRC-16/MAXIM-DOW, CRC-16/MAXIM, CRC-16/MCRF4XX, CRC-16/MODBUS, MODBUS, CRC-16/NRSC-5, CRC-16/OPENSAFETY-A, CRC-16/OPENSAFETY-B, CRC-16/PROFIBUS, CRC-16/IEC-61158-2, CRC-16/RIELLO, CRC-16/SPI-FUJITSU, CRC-16/AUG-CCITT, CRC-16/T10-DIF, CRC-16/TELEDISK, CRC-16/TMS37157, CRC-16/UMTS, CRC-16/BUYPASS, CRC-16/VERIFONE, CRC-16/USB, CRC-16/XMODEM, CRC-16/ACORN, CRC-16/LTE, CRC-16/V-41-MSB, XMODEM, ZMODEM, CRC-17/CAN-FD, CRC-21/CAN-FD, CRC-24/BLE, CRC-24/FLEXRAY-A, CRC-24/FLEXRAY-B, CRC-24/INTERLAKEN, CRC-24/LTE-A, CRC-24/LTE-B, CRC-24/OPENPGP, CRC-24, CRC-24/OS-9, CRC-30/CDMA, CRC-31/PHILIPS, CRC-32/AIXM, CRC-32Q, CRC-32/AUTOSAR, CRC-32/BASE91-D, CRC-32D, CRC-32/BZIP2, CRC-32/AAL5, CRC-32/DECT-B, B-CRC-32, CRC-32/CD-ROM-EDC, CRC-32/CKSUM, CKSUM, CRC-32/POSIX, CRC-32/ISCSI, CRC-32/BASE91-C, CRC-32/CASTAGNOLI, CRC-32/INTERLAKEN, CRC-32C, CRC-32/ISO-HDLC, CRC-32, CRC-32/ADCCP, CRC-32/V-42, CRC-32/XZ, PKZIP, CRC-32/JAMCRC, JAMCRC, CRC-32/MPEG-2, CRC-32/XFER, XFER, CRC-40/GSM, CRC-64/ECMA-182, CRC-64, CRC-64/GO-ISO, CRC-64/WE, CRC-64/XZ, CRC-64/GO-ECMA, CRC-82/DARC

For the class names simply remove all dashes and slashes from the above names and apply CamelCase, e.g. “CRC-32/MPEG-2” is implemented by Crc32Mpeg2. Other CRC can be calculated by using the general class crccheck.crc.Crc by providing all required CRC parameters.

The crccheck.checksum module implements additive and XOR checksums with 8, 16 and 32 bit: Checksum8, Checksum16, Checksum32 and ChecksumXor8, ChecksumXor16, ChecksumXor32

Usage example:

from crccheck.crc import Crc32, CrcXmodem
from crccheck.checksum import Checksum32

# Quick calculation
data = bytearray.fromhex("DEADBEEF")
crc = Crc32.calc(data)
checksum = Checksum32.calc(data)

# Procsss multiple data buffers
data1 = b"Binary string"  # or use .encode(..) on normal sring - Python 3 only
data2 = bytes.fromhex("1234567890")  # Python 3 only, use bytearray for older versions
data3 = (0x0, 255, 12, 99)  # Iterable which returns ints in byte range (0..255)
crcinst = CrcXmodem()
crcinst.process(data1)
crcinst.process(data2)
crcinst.process(data3[1:-1])
crcbytes = crcinst.finalbytes()
crchex = crcinst.finalhex()
crcint = crcinst.final()

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

crccheck-1.1.tar.gz (20.5 kB view hashes)

Uploaded source

Built Distribution

crccheck-1.1-py3-none-any.whl (29.1 kB view hashes)

Uploaded py3

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page