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Low 32 Bitcoin

feat(core): set tropic configuration

Public commit record

What the developer wrote

Authored by Martin Pastyřík

80/100 · Strong
feat(core): set tropic configuration

Set the configuration of Tropic to the value excpected by the firmware.

The current version of tropic configuration is stored in slot 6 of Tropic R memory data. During the setting process, slot 7 is temporarily used to store a backup of the configuration version.

Also refactor tropic configuration from prodtest into firmware and enable sensors setting in model_server.

[no changelog]
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context
The short version

What changed, and why it matters

This commit moves the configuration settings for the Tropic secure chip out of the production-test tool and into the main firmware. At boot, the device now checks whether the Tropic chip's configuration matches the version expected by the firmware, and can update or repair it if needed. It also adds a version number stored in a Tropic memory slot and uses a backup slot during updates. The change is a feature/refactoring patch; there is no direct evidence in the commit that it fixes a known security vulnerability, but misconfiguration of a security chip is a security-sensitive operation.

Recommended action

Review the new `tropic_ensure_configuration()` implementation (not fully shown in the diff) to confirm it cannot downgrade or corrupt the irreversible configuration, and that it handles partial update failures safely. Verify that slot 6/7 access controls prevent unauthorized writes to the distribution version or backup slot. Ensure the generated JSON values match the intended security policy and that the Mako template's address-order check cannot be bypassed.

Security signals we found

01

Boot-time enforcement of expected secure-element configuration

02

Versioned configuration tables for reversible and irreversible Tropic configs

03

Use of a backup slot during configuration update

04

Retry wrappers added for whole-chip configuration reads

05

Refactoring of security-critical configuration out of prodtest into shared firmware

06

No changelog entry and no explicit security framing in commit message

Risk score

Why this scored 32/100

Our methodology →
Potential impact 8/30
Exploitability 5/25
Stealth signal 4/15
Affected reach 6/15
Confidence 6/10
Evidence quality 3/5
Human-validated context

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