Commit graph

2 commits

Author SHA1 Message Date
David Tolnay
de6b29ab9d tpm: Virtio tpm device
This CL adds a "tpm" Cargo cfg to crosvm which enables a TPM device
backed by libtpm2 simulator.

Tested by running the following inside cros_sdk:

    LIBRARY_PATH=~/src/minijail LD_LIBRARY_PATH=~/src/minijail \
        cargo run --release \
        --features tpm \
        -- \
        run \
        -r rootfs.ext4 \
        --seccomp-policy-dir seccomp/x86_64/ \
        -p init=/bin/bash \
        -p panic=-1 \
        --disable-sandbox \
        vmlinux.bin

with a Linux image built from CL:1387655.

The TPM self test completes successfully with the following output:

    https://paste.googleplex.com/5996075978588160?raw

Justin's TPM playground runs with the following trace output.

    https://paste.googleplex.com/4909751007707136?raw

Design doc: go/vtpm-for-glinux

TEST=ran TPM playground program inside crosvm
TEST=local kokoro
BUG=chromium:911799

Change-Id: I2feb24a3e38cba91f62c6d2cd1f378de4dd03ecf
Reviewed-on: https://chromium-review.googlesource.com/1387624
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
2019-01-24 07:43:30 -08:00
David Tolnay
c49ef3e03b tpm: Add tpm2-sys crate
This CL adds a tpm2-sys crate that builds libtpm2 from source (from a
git submodule) using the existing Makefile and then links the generated
static library as -ltpm2.

For production builds there is a flag `RUSTFLAGS='--cfg hermetic'` to
disallow building our own libtpm2. Instead it will expect to find
libtpm2 installed in the standard system location. Building from the
libtpm2 submodule is a convenience only intended for developer
environments.

The functions exposed by tpm2-sys are the ones that will be necessary to
initialize a TPM simulator in crosvm and execute TPM commands. Trunks
uses the same functions for its simulator mode here:

    e4cf13c057/trunks/tpm_simulator_handle.cc

Tested by running:

    fn main() {
        unsafe {
            tpm2_sys::TPM_Manufacture(1);
        }
    }

inside cros_sdk. Libtpm2 cannot be built outside of cros_sdk because it
requires openssl 1.0.2p, whereas dev machines come with openssl 1.1.0j.

I have not yet added any dependency on tpm2-sys from crosvm, but when it
does get added it will be behind a tpm feature flag so that crosvm can
continue to build outside of cros_sdk just without tpm support.

I published num_cpus version 1.9.0 to chromeos-localmirror.

TEST=running the code snippet above as described
BUG=chromium:911799

Change-Id: I097729bc447f9dc95e39959a426d1ac42f46b16d
Reviewed-on: https://chromium-review.googlesource.com/1396280
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
2019-01-13 03:23:13 -08:00