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AntonKueltz / fastecdsa

Python library for fast elliptic curve crypto
https://pypi.python.org/pypi/fastecdsa
The Unlicense
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Importing a public key (originally a byte array) from a ATECC508A cryptochip #57

Closed bshambaugh closed 4 years ago

bshambaugh commented 4 years ago

This involves importing a public key from the cryptographic chip ATECC508A into the library. I found I had a public key that was generated using the p-256 according to the chip documentation, yet the fastecdsa library tells me that the point is not on the curve.

I created a gist to describe my procedure: https://gist.github.com/bshambaugh/6f0fe5a63f96b0e0a95b404cc103e9c4

As well as my broader (newbie) exploration: https://raptorlicious.blogspot.com/2020/07/bringing-together-last-3-cryptography.html

If this is out of scope, is there a better place for this question? Thanks for your time.

bshambaugh commented 4 years ago

I am going to close this issue. I tried a public key from stack-overflow and it worked. This suggests it is not a library issue, but an issue with the public key from the cryptographic authentication chip or the means that I changed it into a hex string from hex byte array for my cryptographic authentication chip.

For more information see: https://gist.github.com/bshambaugh/6f0fe5a63f96b0e0a95b404cc103e9c4

AntonKueltz commented 3 years ago

Sorry I’m just now getting a chance to look at this, will double check tomorrow that the original issue isn’t a problem with this library.