Operation request: ISO14443 SmartCards algorithms (CRC16, BCC)

gchq / CyberChef

The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis

https://gchq.github.io/CyberChef

Apache License 2.0

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Operation request: ISO14443 SmartCards algorithms (CRC16, BCC) #9

Open zhovner opened 8 years ago

zhovner commented 8 years ago

Thank you for great tool!

It will be nice to see algorithms from ISO14443 and ISO13239 contactless smartcards standards.

CRC16_A Initial register 0x6363 or 0xC6C6 in reversed bit order. Polynomial is 0x1021 and no final XOR.
CRC16_B
BCC (Bit Count Check) — simple successively XOR-ing all bytes

I've made my own calculator for example https://hub.zhovner.com/tools/nfc/

zhovner commented 6 years ago

I found a nodejs library crc-full which has all possible types of CRC https://www.npmjs.com/package/crc-full

I suggest to replace CRC16 and CRC32 operations with one CRC operation with drop-down list containing all possible types.

But the crc-full lib depends on typescript. Is this ok?

n1474335 commented 6 years ago

Looks like a cool library. Typescript may be an issue, but I'll have a play around.

stefnotch commented 2 years ago

crc-full doesn't actually depend on Typescript, instead Typescript is a development dependency. The compiled code is just plain Javascript. (Yes the project is configured slightly incorrectly, but hey, nobody's perfect.)