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Informational 18 Bitcoin

refactor: Move HSM keys to common/hsm_keys.json

Public commit record

What the developer wrote

Authored by Andrew Kozlik

57/100 · Thin
refactor: Move HSM keys to common/hsm_keys.json

[no changelog]
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
The short version

What changed, and why it matters

This is a code-maintenance refactor, not a security fix. It moves public HSM (Hardware Security Module) and device-authenticity root keys from a C header file into a shared JSON file, then auto-generates both the C header and a Python file from that JSON. The actual key values do not change. A few related C files are updated to use a new feature flag (USE_MCU_ATTESTATION) and consistent size constants for the ML-DSA algorithm. There is no evidence in the commit of a vulnerability being patched.

Recommended action

No security action required. Treat as normal build/development hygiene. If reviewing, verify that generate_hsm_keys.py correctly reproduces the prior key values and that the new USE_MCU_ATTESTATION guards compile cleanly on targets that do not support MCU attestation.

Security signals we found

01

Public keys only — no private key material is present in the repository

02

No change to signature verification logic; only macro/constant refactoring

03

ML-DSA code paths now gated by USE_MCU_ATTESTATION feature flag

04

Auto-generation tooling added to reduce manual key duplication

05

No changelog entry and title says 'refactor'

Risk score

Why this scored 18/100

Our methodology →
Potential impact 2/30
Exploitability 1/25
Stealth signal 1/15
Affected reach 2/15
Confidence 8/10
Evidence quality 4/5
Human-validated context

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