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36 lines
1.5 KiB
36 lines
1.5 KiB
// Copyright 2020, 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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//! Rust binding for getting the attestation application id.
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use keystore2_aaid_bindgen::{
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aaid_keystore_attestation_id, KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE,
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};
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/// Returns the attestation application id for the given uid or an error code
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/// corresponding to ::android::status_t.
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pub fn get_aaid(uid: u32) -> Result<Vec<u8>, u32> {
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let mut buffer = [0u8; KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE];
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let mut size = KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE;
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// Safety:
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// aaid_keystore_attestation_id expects a buffer of exactly
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// KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE bytes and returns the number of bytes written
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// in the second pointer argument.
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let status = unsafe { aaid_keystore_attestation_id(uid, buffer.as_mut_ptr(), &mut size) };
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match status {
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0 => Ok(buffer[0..size as usize].to_vec()),
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status => Err(status),
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}
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}
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