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47 lines
2.0 KiB
47 lines
2.0 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.hardware.authsecret@1.0;
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/**
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* This security HAL allows vendor components to be cryptographically tied to
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* the primary user's credential. For example, security hardware could require
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* proof that the credential is known before applying updates.
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*
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* This HAL is optional so does not require an implementation on device.
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*/
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interface IAuthSecret {
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/**
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* When the primary user is unlocked, this method is passed a secret to
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* prove that is has been successfully unlocked. The primary user can either
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* be unlocked by a person entering their credential or by another party
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* using an escrow token e.g. a device administrator.
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*
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* The first time this is called, the secret must be used to provision state
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* that depends on the primary user's secret. The same secret must be passed
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* on each call until the next factory reset.
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*
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* Upon factory reset, any dependence on the secret must be removed as that
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* secret is now lost and must never be derived again. A new secret must be
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* created for the new primary user which must be used to newly provision
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* state the first time this method is called after factory reset.
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*
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* The secret must be at least 16 bytes.
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*
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* @param secret blob derived from the primary user's credential.
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*/
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oneway primaryUserCredential(vec<uint8_t> secret);
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};
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