kopia lustrzana https://github.com/conorpp/u2f-zero
vtcsec_summit
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README.md
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README.md
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@ -4,9 +4,6 @@ U2F Zero
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========
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Overview
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=======
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@ -86,6 +83,26 @@ U2F layer:
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* u2f.h
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* u2f-atecc.c // device specific implementation
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## Random number generation
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U2F Zero has a hardware true random number generator (TRNG). It's used internally
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for key generating and signing but it's also exposed to the user for other use cases because
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a good source of entropy can be useful.
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Generate random numbers from the device:
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```python
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cd tools/u2f_zero_client
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./client.py rng # output randomness at about 1400 bytes/s
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```
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Update the seed with user supplied data:
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```python
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cd tools/u2f_zero_client
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cat /dev/random | ./client.py seed # update seed at about 410 bytes/s
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```
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## Build a U2F Zero token yourself
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What's the point of an open source project if you can't build it yourself?
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@ -139,8 +156,8 @@ First open "app.h" and uncomment "ATECC_SETUP_DEVICE". Now build and program th
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Now to check the device works, lock it, and get the public key used for attestation.
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```bash
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cd tools/hid_config
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./config.py pubkey.hex
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cd tools/u2f_zero_client
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./client.py configure pubkey.hex
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```
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The ECC public key X,Y values will be stored in hex in pubkey.hex if setup is successful.
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