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Informational 21 Bitcoin

feat(common): allow streaming authenticity proofs

Public commit record

What the developer wrote

Authored by Roman Zeyde

57/100 · Thin
feat(common): allow streaming authenticity proofs

[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 commit only changes the protocol definitions (the 'language' the Trezor device and apps use to talk to each other). It adds a new optional streaming mode for requesting device-authenticity proofs, so large proofs can be sent in smaller chunks instead of one big message. There is no actual device firmware logic shown here—only generated message bindings—so it is not a security fix or vulnerability by itself. It is a feature addition that could, in theory, introduce new attack surface once the corresponding firmware code is implemented, but that code is not present in this commit.

Recommended action

Treat this as a feature commit, not a security patch. When the corresponding firmware implementation lands, review it for bounds checking on offset/size, validation of proof_type/index, and ensuring the streaming workflow cannot be abused to leak arbitrary memory or bypass authenticity verification.

Security signals we found

01

New wire protocol messages for device authenticity proof streaming

02

Optional streaming flag added to AuthenticateDevice

03

Legacy firmware skips new GetAuthenticityProofChunk message, indicating not all targets support it

04

No implementation logic present in the diff—only generated bindings and proto definitions

Risk score

Why this scored 21/100

Our methodology →
Potential impact 2/30
Exploitability 2/25
Stealth signal 2/15
Affected reach 3/15
Confidence 8/10
Evidence quality 4/5
Human-validated context

Community notes

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