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Hardware-wallet app for Handshake (HNS). Derives Handshake addresses and signs
Handshake transactions, including name-auction covenants, on Ledger Stax, Flex,
Nano S+, Nano X and Apex+.
The design premise is that the host computer is untrusted: every APDU byte is
attacker-controlled, and the device's job is to be correct when the host lies.
Two failures outrank all others, and the code is shaped around them.
Signing something other than what the user approved. Any field the signature
commits to and the host can vary has to appear on the review screen, and
anything the screen cannot represent honestly is refused rather than shown under
a label that does not describe it. So the device signs SIGHASH_ALL only,
checked per input rather than once for the session; it displays a TRANSFER
covenant's destination, which decides who ends up owning the name and appears
nowhere else in the output; it shows a covenant's name hash when the plaintext
name cannot be verified against it; and it refuses covenant kinds it cannot
name, outputs whose values exceed their inputs, and declared input totals that
would overflow the fee arithmetic.
Misusing key material. Derivation paths are constrained to
m/44'/{5353..5356}'/account'[/change/index] in the app itself, not only by the
install manifest, because BOLOS terminates the app on an out-of-whitelist path
instead of returning an error. One coin type per signing session, since the
review renders every address under a single HRP.
Panics count too: set_panic!(exiting_panic) means a panic kills the app and
strands the session, so nothing unwraps on host-derived data and the session
ceilings are sized to the configured heap.
Consensus follows shd, the Swift Handshake node, which is the reference for the
sighash preimage, covenant item layouts and address encoding.
SIGN_TX is a PSBT-style state machine driven by P1 (BEGIN / ADD_INPUT /
ADD_OUTPUT / REVIEW / SIGN_INPUT): the host streams the transaction as
structured records, the device accumulates its own view of the values, shows one
review, then signs each input on demand.
Tests run under speculos in a container (./scripts/test), 66 of them, green on
all five devices. test_sign_tx_policy.py covers each refusal above and needs no
golden snapshots because every case is rejected before anything is drawn; the
snapshots that do exist are the record of what the user sees before approving.
tests/application_client/handshake_sighash.py is a deliberately independent
reimplementation of the sighash, used to verify real signatures.
Status: v0.1, pre-audit. Not for mainnet keys. Signing has not yet been
exercised on physical hardware.
Forked from LedgerHQ/app-boilerplate-rust (Apache-2.0).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
51 lines
1.9 KiB
YAML
51 lines
1.9 KiB
YAML
name: Build and run functional tests using ragger through reusable workflow
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# This workflow will build the app and then run functional tests using the Ragger framework upon Speculos emulation.
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# It calls a reusable workflow developed by Ledger's internal developer team to build the application and upload the
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# resulting binaries.
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# It then calls another reusable workflow to run the Ragger tests on the compiled application binary.
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#
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# The build part of this workflow is mandatory, this ensures that the app will be deployable in the Ledger App Store.
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# While the test part of this workflow is optional, having functional testing on your application is mandatory and this workflow and
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# tooling environment is meant to be easy to use and adapt after forking your application
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permissions:
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contents: write
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actions: write
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pull-requests: write
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on:
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workflow_dispatch:
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inputs:
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golden_run:
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type: choice
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required: true
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default: 'Raise an error (default)'
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description: CI behavior if the test snapshots are different than expected.
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options:
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- 'Raise an error (default)'
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- 'Open a PR'
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push:
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branches:
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- master
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- main
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- develop
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pull_request:
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jobs:
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build_application:
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name: Build application using the reusable workflow
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uses: LedgerHQ/ledger-app-workflows/.github/workflows/reusable_build.yml@v1
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with:
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upload_app_binaries_artifact: "app_handshake_binaries"
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builder: ledger-app-builder
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tests_standalone:
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name: Run standalone ragger tests using the reusable workflow
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needs: build_application
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uses: LedgerHQ/ledger-app-workflows/.github/workflows/reusable_ragger_tests.yml@v1
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with:
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download_app_binaries_artifact: "app_handshake_binaries"
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regenerate_snapshots: ${{ github.event_name == 'workflow_dispatch' && inputs.golden_run == 'Open a PR' }}
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test_dir: "tests/standalone"
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