gtec_attest

Contains only public keys. The signing keys live in the amplifier packages.

Verification of g.tec amplifier attestations. An amplifier package signs a challenge with a private key held in its compiled layer; this package checks that signature against a public key it carries.

It returns a verdict about a device — never a permission, tier or entitlement. Mapping verdicts onto entitlements is the consuming product's job.

Install

pip install gtec_attest

Wheels are published for Windows, macOS (universal2) and manylinux across CPython 3.10 to 3.14.

Use

import gtec_attest

nonce = gtec_attest.mint_nonce()              # 32 bytes, once per device
attestation = amp.attest(nonce)               # 67 bytes from the amplifier

verdict = gtec_attest.verify(
    attestation,
    serial=amp.serial_number,                 # byte-identical to the handle
    nonce=nonce,
)

if verdict:
    ...                                       # genuine device
else:
    log.warning("unattested source: %s", verdict.reason.name)

verify() is a pure function: no I/O, no clock, no network.

Field Meaning
verified True only if the signature checks out against an accepted key
key_id The key ID carried in the attestation
serial Echo of the serial you passed in
reason OK, BAD_SIGNATURE, UNKNOWN_KEY_ID, MALFORMED, SERIAL_MISMATCH, RETIRED_KEY

Mint one nonce per device per pipeline start with mint_nonce(). Never reuse one and never cache one.

Integration notes

Products that enforce on the verdict should not rely on importing this module. Contact g.tec for the integration component and guidance.

© g.tec medical engineering GmbH — support@gtec.at

Key dates

PyPI data
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  • Released:
Latest release

1 maintainer

PyPI data
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Avatar for gtec from gravatar.com gtec

Credits

Author: g.tec medical engineering GmbH

License expression

LicenseRef-GNCL
View SPDX License List

Requires

Python >=3.10

Provides Extra

test build lint pypi release vectors

Classifiers

Report project as malware

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