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Moderate 61 Bitcoin

feat: sanity-check seed entropy

Public commit record

What the developer wrote

Authored by Andrew Kozlik

77/100 · Adequate
feat: sanity-check seed entropy

[no changelog]

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides an explanatory body✓ Names security-relevant behavior explicitly
The short version

What changed, and why it matters

This commit adds safety checks during wallet creation to make sure the randomness used to generate the recovery seed is long enough and not obviously broken. It also aborts the setup process cleanly if something arrives at the wrong time. These are defensive hardening changes rather than a fix for a known active attack.

Recommended action

Treat as a defensive hardening commit. Review whether the new minimum entropy requirement is compatible with third-party clients that may supply shorter entropy, and ensure reset_abort() does not leak state or introduce denial-of-service issues.

Security signals we found

01

Insufficient-entropy validation added to device firmware and client

02

Internal entropy length check with device halt on mismatch

03

Client-side checks for constant or repeated internal entropy during entropy-check rounds

04

Unexpected-message paths now abort the reset state machine

05

Tests added for insufficient external entropy on both firmware families

Risk score

Why this scored 61/100

Our methodology →
Potential impact 18/30
Exploitability 12/25
Stealth signal 8/15
Affected reach 12/15
Confidence 7/10
Evidence quality 4/5
Human-validated context

Community notes

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