| // |
| // Copyright (C) 2024 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| use optee_utee::Uuid; |
| use optee_utee_sys::{ |
| TEE_GetPropertyAsIdentity, TEE_Identity, TEE_LOGIN_PUBLIC, TEE_LOGIN_TRUSTED_APP, |
| TEE_PROPSET_CURRENT_CLIENT, TEE_SUCCESS, TEE_UUID, |
| }; |
| |
| // Identity of the current-session TA's client. |
| pub enum ClientId { |
| TA(Uuid), |
| Other, |
| } |
| |
| impl ClientId { |
| pub fn detect() -> Self { |
| let prop_name = c"gpd.client.identity"; |
| let mut detected = TEE_Identity { |
| login: TEE_LOGIN_PUBLIC, |
| uuid: TEE_UUID { timeLow: 0, timeMid: 0, timeHiAndVersion: 0, clockSeqAndNode: [0; 8] }, |
| }; |
| // SAFETY: TEE_GetPropertyAsIdentity expects *const c_char for the name and |
| // *mut TEE_Identity for the value, and both pointers are valid. |
| match unsafe { |
| TEE_GetPropertyAsIdentity( |
| TEE_PROPSET_CURRENT_CLIENT, |
| prop_name.as_ptr() as _, |
| &mut detected, |
| ) |
| } { |
| TEE_SUCCESS if detected.login == TEE_LOGIN_TRUSTED_APP => { |
| ClientId::TA(Uuid::from_raw(detected.uuid)) |
| } |
| _ => ClientId::Other, |
| } |
| } |
| } |