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34 lines
978 B
Rust
34 lines
978 B
Rust
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// Copyright 2022 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//! Software TPM backend using the TPM2 simulator from the `tpm2` crate.
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use std::env;
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use std::fs;
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use std::path::Path;
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use anyhow::Context;
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use tpm2::Simulator;
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use super::virtio::TpmBackend;
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pub struct SoftwareTpm {
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simulator: Simulator,
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}
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impl SoftwareTpm {
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pub fn new<P: AsRef<Path>>(storage: P) -> anyhow::Result<Self> {
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fs::create_dir_all(storage.as_ref()).context("failed to create directory for simulator")?;
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env::set_current_dir(storage).context("failed to change into simulator directory")?;
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let simulator = Simulator::singleton_in_current_directory();
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Ok(SoftwareTpm { simulator })
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}
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}
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impl TpmBackend for SoftwareTpm {
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fn execute_command<'a>(&'a mut self, command: &[u8]) -> &'a [u8] {
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self.simulator.execute_command(command)
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}
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}
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