Peter "blasty" Geissler's upc_keys.c with custom prefix support and Lambda sauce
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upc_keys.c with custom prefix support and Lambda sauce

This is Peter "blasty" Geissler's original upc_keys.c, modified to support custom prefixes. The output is also more machine-readable. This is what powers my passphrase recovery tool for UPC1234567 devices.

I run this code in AWS Lambda, so I've included a short howto for setting it up, Node.js wrapper, and Makefile to make a .zip file to upload to Lambda.

Building it

make build or gcc -O3 -o upc_keys upc_keys.c -lcrypto

Using it

upc_keys <ESSID> <PREFIXES>

Where:

  • <ESSID> should be in UPCxxxxxxx format
  • <PREFIXES> should be a string of comma separated serial number prefixes