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//
// Copyright (C) 2022 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.
//! KeyMint TA core for Cuttlefish.
extern crate alloc;
use kmr_wire::keymint::SecurityLevel;
use libc::c_int;
use log::error;
use std::os::fd::OwnedFd;
/// FFI wrapper around [`kmr_cf::ta_main`].
///
/// # Safety
///
/// `fd_in`, `fd_out`, and `snapshot_socket_fd` must be valid and open file descriptors and the
/// caller must not use or close them after the call.
///
/// TODO: What are the preconditions for `trm`?
#[no_mangle]
pub unsafe extern "C" fn kmr_ta_main(
fd_in: OwnedFd,
fd_out: OwnedFd,
security_level: c_int,
trm: *mut libc::c_void,
snapshot_socket_fd: OwnedFd,
) {
let security_level = match SecurityLevel::n(security_level) {
Some(
x @ (SecurityLevel::Software
| SecurityLevel::TrustedEnvironment
| SecurityLevel::Strongbox),
) => x,
_ => {
error!("unexpected security level {}, running as SOFTWARE", security_level);
SecurityLevel::Software
}
};
// SAFETY: TODO: What are the preconditions for `trm`?
unsafe {
kmr_cf::ta_main(fd_in.into(), fd_out.into(), security_level, trm, snapshot_socket_fd.into())
}
}
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