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feat(tools): add ECDSA P-256 key generation tool and public key header

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Generates firmware signing keypair; private key stays in gitignored
secrets/, public key written as 65-byte C array to
firmware/lib/ota_updater/ota_pubkey.h for compile-time OTA verification.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Peter Woolery
2026-05-11 06:47:10 -07:00
parent 21a3c646aa
commit 437f73739f
4 changed files with 112 additions and 0 deletions
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firmware/lib/ota_updater/ota_pubkey.h Normal file
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#pragma once
// Auto-generated by tools/gen_signing_key.py — DO NOT EDIT
// ECDSA P-256 public key, uncompressed X9.62 (04 || X || Y)
static const uint8_t kOtaPublicKey[65] = {0x04, 0x1c, 0x92, 0x43, 0x23, 0xe9, 0xac, 0xd1, 0xe8, 0x05, 0x32, 0x49, 0x39, 0x12, 0x95, 0xb2, 0x0a, 0x3e, 0xfb, 0x9d, 0xdf, 0xee, 0xd1, 0x98, 0x87, 0x97, 0xa3, 0xb8, 0xcb, 0x2b, 0xa6, 0x06, 0xe0, 0x83, 0x32, 0x71, 0xd2, 0x5f, 0x80, 0x40, 0x68, 0xcd, 0x00, 0xe5, 0x0e, 0xba, 0x13, 0xf6, 0x97, 0x43, 0x6f, 0xe6, 0x4f, 0xd0, 0x95, 0x53, 0x0e, 0xd7, 0x9a, 0x8a, 0x2e, 0x25, 0x52, 0xb4, 0xaf};