File snphost-0.5.0.obscpio of Package snphost
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# the repo. Unless a later match takes precedence,
# @global-owner1 and @global-owner2 will be requested for
# review when someone opens a pull request.
* @tylerfanelli
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assignees:
- DGonzalezVillal
- tylerfanelli
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07070100000003000081A400000000000000000000000166DA69EB00000202000000000000000000000000000000000000002600000000snphost-0.5.0/.github/auto_assign.yml# Set to true to add reviewers to pull requests
addReviewers: true
# Set to true to add assignees to pull requests
addAssignees: true
# A list of reviewers to be added to pull requests (GitHub user name)
reviewers:
- DGonzalezVillal
- tylerfanelli
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# A list of keywords to be skipped the process that add reviewers if pull requests include it
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# Set 0 to add all the reviewers (default: 0)
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updates:
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on:
pull_request:
jobs:
check:
runs-on: ubuntu-latest
steps:
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name: lint
jobs:
fmt:
name: cargo fmt
runs-on: ubuntu-latest
steps:
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with:
components: rustfmt
toolchain: nightly
profile: minimal
override: true
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with:
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clippy:
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runs-on: ubuntu-latest
steps:
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profile: minimal
override: true
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name: ${{ matrix.toolchain }} (${{ matrix.profile.name }})
runs-on: ubuntu-latest
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args: ${{ matrix.profile.flag }}
strategy:
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matrix:
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profile:
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flag: --release
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"bincode",
"bitfield",
"bitflags 1.3.2",
"byteorder",
"codicon",
"dirs",
"hex",
"iocuddle",
"lazy_static",
"libc",
"openssl",
"rdrand",
"serde",
"serde-big-array",
"serde_bytes",
"static_assertions",
"uuid",
]
[[package]]
name = "snphost"
version = "0.5.0"
dependencies = [
"anyhow",
"clap",
"colorful",
"curl",
"env_logger",
"libc",
"msru",
"sev",
]
[[package]]
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"windows_i686_gnu 0.48.5",
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"windows_aarch64_msvc 0.52.5",
"windows_i686_gnu 0.52.5",
"windows_i686_gnullvm",
"windows_i686_msvc 0.52.5",
"windows_x86_64_gnu 0.52.5",
"windows_x86_64_gnullvm 0.52.5",
"windows_x86_64_msvc 0.52.5",
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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0707010000000B000081A400000000000000000000000166DA69EB000004B1000000000000000000000000000000000000001900000000snphost-0.5.0/Cargo.toml[package]
name = "snphost"
version = "0.5.0"
authors = ["The VirTEE Project Developers"]
edition = "2021"
license = "Apache-2.0"
homepage = "https://github.com/virtee/snphost"
repository = "https://github.com/virtee/snphost"
description = "Administrative utility for AMD SEV-SNP"
readme = "README.md"
keywords = ["amd", "sev", "snp"]
categories = ["os", "os::linux-apis", "parsing", "cryptography", "hardware-support"]
exclude = [ ".gitignore", ".github/*" ]
rust-version = "1.74"
[badges]
# See https://doc.rust-lang.org/cargo/reference/manifest.html#the-badges-section
github = { repository = "virtee/snphost", workflow = "test" }
#github = { repository = "virtee/snphost", workflow = "lint" }
maintenance = { status = "actively-developed" }
is-it-maintained-issue-resolution = { repository = "virtee/snphost" }
is-it-maintained-open-issues = { repository = "virtee/snphost" }
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.83"
sev = { version = "4.0.0", features = ['openssl']}
env_logger = "0.10.1"
clap = { version = "4.5", features = [ "derive" ] }
colorful = "0.2.2"
libc = "0.2.154"
curl = "0.4"
msru = "0.2.0"
0707010000000C000081A400000000000000000000000166DA69EB00002C5D000000000000000000000000000000000000001600000000snphost-0.5.0/LICENSE Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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0707010000000D000081A400000000000000000000000166DA69EB000000B2000000000000000000000000000000000000001800000000snphost-0.5.0/README.md# snphost
Management CLI for SEV-SNP host system administrators
Please consult `docs/snphost.1.adoc` for an overview of `snphost` and
descriptions of each `snphost` subcommand.
0707010000000E000081A400000000000000000000000166DA69EB00000636000000000000000000000000000000000000001700000000snphost-0.5.0/build.rs// SPDX-License-Identifier: Apache-2.0
use std::path::Path;
use std::{env, fs, io, process};
const COMMANDS: [&str; 1] = ["snphost"];
fn main() {
let outdir = match env::var_os("OUT_DIR") {
Some(outdir) => outdir,
None => {
panic!("OUT_DIR environment variable not defined.");
}
};
fs::create_dir_all(&outdir).unwrap();
for command in COMMANDS {
if let Err(err) = generate_man_page(&outdir, command) {
println!(
"failed to generate man page: {} (is asciidoctor installed?)",
err
);
}
}
}
fn generate_man_page<P: AsRef<Path>>(outdir: P, command: &str) -> io::Result<()> {
// If asciidoctor isn't installed, fallback to asciidoc.
if let Err(err) = process::Command::new("asciidoctor").output() {
eprintln!("Error from running 'asciidoctor': {}", err);
return Err(err);
}
let outdir = outdir.as_ref();
let outfile = outdir.join(format!("{}.1", command));
let cwd = env::current_dir()?;
let txt_path = cwd.join("docs").join(format!("{}.1.adoc", command));
let result = process::Command::new("asciidoctor")
.arg("--doctype")
.arg("manpage")
.arg("--backend")
.arg("manpage")
.arg("--out-file")
.arg(&outfile)
.arg(&txt_path)
.spawn()?
.wait()?;
if !result.success() {
let msg = format!("'asciidoctor' failed with exit code {:?}", result.code());
return Err(io::Error::new(io::ErrorKind::Other, msg));
}
Ok(())
}
0707010000000F000041ED00000000000000000000000266DA69EB00000000000000000000000000000000000000000000001300000000snphost-0.5.0/docs07070100000010000081A400000000000000000000000166DA69EB00001920000000000000000000000000000000000000002200000000snphost-0.5.0/docs/snphost.1.adocsnphost(1)
==========
NAME
----
snphost - Command line tool for managing the AMD SEV-SNP environment.
SYNOPSIS
--------
*snphost* [GLOBAL_OPTIONS] [_COMMAND_] [_COMMAND_ARGS_] +
*snphost* [_-h, --help_] +
*snphost* *command* *--help*
DESCRIPTION
-----------
snphost is a CLI utility for managing and interacting with the AMD SEV-SNP
firmware device of a host system.
GLOBAL OPTIONS
--------------
*-q, --quiet*:: Don't print any output to the console.
COMMANDS
--------
*snphost export*::
usage: snphost export [der, pem] CERT-FILE DIR-PATH
This command exports the SEV-SNP certificate chain to the directory
provided by DIR-PATH. User has to provide the CERT-FILE where the certs
are currently stored in (in GHCB format). The user must also specify if
they want the certs to be exported in PEM or DER certificate format. These are the only
two encoding formats supported in this tool. Currently only AMD chain certificates (ARK, ASK, VCEK and VLEK)
are supported for export.
options:
-h, --help Show a help message.
*snphost import*::
usage: snphost import DIR-PATH CERT-FILE
This command imports serialized SEV-SNP certificates to the specified CERT-FILE.
This CERT-FILE can then be provided to QEMU to perform extended attestation on guest.
Currently, only the ASK, ARK, VCEK and VLEK are supported to serialize in the tool.
Note that there are a few user requirements for this command to work as intended.
All certificates must be located in the same directory with specific
names:
ARK certificate => ark.{pem, der}
ASK certificate => ask.{pem, der}
VCEK certificate => vcek.{pem, der}
VLEK certificate => vlek.{pem, der}
Not all certificates are needed in the directory, only the ones that a
user is looking to import to the CERT-FILE.
options:
-h, --help Show a help message
*snphost ok*::
usage: snphost ok
This command probes the processor, sysfs, and KVM for AMD SEV-SNP
related capabilities on the host and emits the results.
options:
-h, --help Show a help message
*snphost commit*::
usage: snphost commit
This command commits the current firmware and SNP platform config versions to the PSP.
This can't be undone and will not allow rollbacks to older versions.
options:
-h, --help Show a help message.
*snphost config set*::
usage: snphost config set BOOTLOADER TEE SNP-FW MICROCODE MASK-CHIP
This command allows the user to change the config of the SNP platform. The user can
provide the desired versions of the different TCB paramerters they would like to modify.
The command will change the reported values by the PSP. In order to have this changes commited, the
user would have to use snphost commit. The user can also provide a new mask-chip value that
will change the mask chip bit field values in the config.
Explanation of the different parmeters:
BOOTLOADER: Desired reported bootloader version
TEE: Desired reported PSP OS version
SNP-FW: Desired reported SNP Firmware level
MICROCODE: Desired reported patch level of all the cores
MASK-CHIP: Change the CHIP ID and CHIP KEY settings by changing the MASK-CHIP bits.
Valid values range from 0-3 depending on what bits the user wants enabled.
Bit[0] -> CHIP ID: Indicates that the CHIP_ID field in the attestation report
will always be 0.
Bit[1] -> MASK KEY: Indicates that the VCEK is not used in attestation and guest
key derivation.
For example, if the user would like MASK KEY to be enabled and CHIP ID disabled,
then the they would pass in a 2.
options:
-h, --help Show a help message.
*snphost config reset*::
usage: snphost config reset
This command resets the SEV-SNP platform. This will clear all
persistent data managed by the platform and reset the platform configuration
to its last committed version.
options:
-h, --help Show a help message.
*snphost show*::
usage: snphost show [guests, identifier, tcb, vcek-url, version ]
This command describes the state of the SEV-SNP platform. There are
several platform details to describe:
Guest count: snphost show guests
Platform identifier: snphost show identifier
TCB version: snphost show tcb
VCEK URL: snphost show vcek-url
Firmware version: snphost show version
options:
-h, --help Show a help message
*snphost verify*::
usage: snphost verify DIR-PATH
This command verifies the full SEV-SNP/CA certificate chain.
It will use the ask,ark, and vek (vcek or vlek) certificates that are
stored in the provided directory. If both the vlek and vcek are present,
then the tool will use the vlek by default.
options:
-h, --help Show a help message
*snphost fetch ca*::
usage: snphost fetch ca [ der, pem ] DIR-PATH
This command fetches the host system's CA certificate chain and writes
the encoded certificates to the directory at path DIR-PATH. Users must
specify which format they would like the certificate to be encoded
in (DER or PEM).
options:
-h, --help Show a help message
*snphost fetch vcek*::
usage: snphost fetch vcek [ der, pem ] DIR-PATH
This command fetches the host system's versioned chip endorsement
key (VCEK) and writes the encoded certificate to the directory at path
DIR-PATH. Users must specify which format they would like the
certificate to be encoded in (DER or PEM).
options:
-h, --help Show a help message
*snphost fetch crl*::
usage: snphost fetch crl DIR-PATH
This command fetches the host system's certificate revokation list
(CRL) and writes the encoded list to the directory at path DIR-PATH.
options:
-h, --help Show a help message
REPORTING BUGS
--------------
Please report all bugs to <https://github.com/virtee/snphost/issues>
07070100000011000041ED00000000000000000000000266DA69EB00000000000000000000000000000000000000000000001200000000snphost-0.5.0/src07070100000012000041ED00000000000000000000000266DA69EB00000000000000000000000000000000000000000000001700000000snphost-0.5.0/src/cert07070100000013000081A400000000000000000000000166DA69EB00000DA3000000000000000000000000000000000000002100000000snphost-0.5.0/src/cert/export.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
use anyhow::{bail, Context, Result};
use sev::{
certs::snp::Certificate,
firmware::host::{CertTableEntry, CertType},
};
use std::{
fs::File,
io::{BufReader, Read, Write},
path::PathBuf,
};
// Convert kernel formatted certs into user readable certificates
fn cert_entries(cert_bytes: &mut [u8]) -> Result<Vec<CertTableEntry>> {
let certs = CertTableEntry::vec_bytes_to_cert_table(cert_bytes)
.context("Could not convert bytes to certs")?;
Ok(certs)
}
#[derive(Parser)]
pub struct Export {
/// The format the certs will be encoded in (PEM or DER)
#[arg(value_name = "encoding", required = true)]
pub encoding_fmt: EncodingFormat,
/// File where the formatted certificates are stored.
#[arg(value_name = "cert-file", required = true)]
pub cert_file: PathBuf,
/// The directory to write the certificates to
#[arg(value_name = "dir-path", required = true)]
pub dir_path: PathBuf,
}
pub fn cmd(export: Export) -> Result<()> {
let (mut ark, mut ask, mut vcek, mut vlek) = (false, false, false, false);
std::fs::create_dir_all(export.dir_path.clone()).context(format!(
"unable to find or create directory {}",
export.dir_path.display()
))?;
// Read the cert file with the kenrel formatted certs
let cert_file = File::open(export.cert_file)?;
let mut reader = BufReader::new(cert_file);
let mut cert_bytes = Vec::new();
// Read file into vector.
reader.read_to_end(&mut cert_bytes)?;
// Create a vec of CertTableEntry (x509 versioned)
let entries = cert_entries(&mut cert_bytes)?;
for e in entries {
let type_id = match e.cert_type {
CertType::ARK => {
if ark {
bail!("multiple ARKs found");
}
ark = true;
"ark"
}
CertType::ASK => {
if ask {
bail!("multiple ASKs found");
}
ask = true;
"ask"
}
CertType::VLEK => {
if vlek {
bail!("multiple VLEKs found");
}
vlek = true;
"vlek"
}
CertType::VCEK => {
if vcek {
bail!("multiple VCEKs found");
}
vcek = true;
"vcek"
}
_ => continue,
};
let certificate = Certificate::from_bytes(&e.data)?;
// Verify the certificate is in the requested format.
let formatted_data: Vec<u8> = match export.encoding_fmt {
EncodingFormat::Der => certificate.to_der()?,
EncodingFormat::Pem => certificate.to_pem()?,
};
// Build out the expected name of the file.
let name = format!(
"{}/{}.{}",
export.dir_path.display(),
type_id,
export.encoding_fmt
);
// Create the file for writing and open a file-handle.
let mut file = std::fs::OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(name.clone())?;
// Write out the contents of the certificate to the file.
file.write_all(&formatted_data)
.context(format!("unable to cert data to file {}", name))?;
}
Ok(())
}
07070100000014000041ED00000000000000000000000266DA69EB00000000000000000000000000000000000000000000001D00000000snphost-0.5.0/src/cert/fetch07070100000015000081A400000000000000000000000166DA69EB00000911000000000000000000000000000000000000002300000000snphost-0.5.0/src/cert/fetch/ca.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
use anyhow::{Context, Result};
use curl::easy::Easy;
use sev::certs::snp::{ca::Chain, Certificate};
use std::{
fs::{create_dir_all, OpenOptions},
io::Write,
path::PathBuf,
};
use super::super::EncodingFormat;
use crate::processor::ProcessorGeneration;
#[derive(Parser)]
pub struct Ca {
/// The format the certs are encoded in.
#[arg(value_name = "encoding", required = true)]
pub encoding_fmt: EncodingFormat,
/// The directory to write the certificates to
#[arg(value_name = "dir-path", required = true)]
pub dir_path: PathBuf,
}
fn write_cert(path: &PathBuf, bytes: &[u8]) -> Result<()> {
let mut file = OpenOptions::new()
.create(true)
.truncate(true)
.write(true)
.open(path)?;
file.write_all(bytes)
.context("Failed to write certificate!")
}
pub fn cmd(ca: Ca) -> Result<()> {
let url: String = ca_chain_url()?;
let cert_chain: Chain = fetch(&url)?;
let ((ask_path, ask_bytes), (ark_path, ark_bytes)) = match ca.encoding_fmt {
EncodingFormat::Der => (
("ask.der", cert_chain.ask.to_der()?),
("ark.der", cert_chain.ark.to_der()?),
),
EncodingFormat::Pem => (
("ask.pem", cert_chain.ask.to_pem()?),
("ark.pem", cert_chain.ark.to_pem()?),
),
};
// Create Directory if not exists first, then write the files.
if !ca.dir_path.exists() {
create_dir_all(&ca.dir_path)?;
}
write_cert(&ca.dir_path.join(ask_path), &ask_bytes)?;
write_cert(&ca.dir_path.join(ark_path), &ark_bytes)?;
Ok(())
}
pub fn fetch(url: &str) -> Result<Chain> {
let mut handle = Easy::new();
let mut buf: Vec<u8> = Vec::new();
handle.url(url)?;
handle.get(true)?;
let mut transfer = handle.transfer();
transfer.write_function(|data| {
buf.extend_from_slice(data);
Ok(data.len())
})?;
transfer.perform()?;
drop(transfer);
Ok(Chain {
ask: Certificate::from_pem(&buf[..2325])?,
ark: Certificate::from_pem(&buf[2325..])?,
})
}
fn ca_chain_url() -> Result<String> {
Ok(format!(
"https://kdsintf.amd.com/vcek/v1/{}/cert_chain",
ProcessorGeneration::current()?.to_kds_url()
))
}
07070100000016000081A400000000000000000000000166DA69EB000005F5000000000000000000000000000000000000002400000000snphost-0.5.0/src/cert/fetch/crl.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
use crate::processor::ProcessorGeneration;
use anyhow::{Context, Result};
use curl::easy::Easy;
use std::{
fs::{create_dir_all, OpenOptions},
io::Write,
path::PathBuf,
};
fn crl_url() -> Result<String> {
Ok(format!(
"https://kdsintf.amd.com/vcek/v1/{}/crl",
ProcessorGeneration::current()?.to_kds_url()
))
}
#[derive(Parser)]
pub struct Crl {
/// The directory to write the CRL to
#[arg(value_name = "dir-path", required = true)]
pub dir_path: PathBuf,
}
pub fn cmd(crl: Crl) -> Result<()> {
let url: String = crl_url()?;
let bytes: Vec<u8> = fetch(&url)?;
// Create Directory if not exists first, then write the files.
if !crl.dir_path.exists() {
create_dir_all(&crl.dir_path)?;
}
let mut file = OpenOptions::new()
.create(true)
.truncate(true)
.write(true)
.open(crl.dir_path.join(format!(
"{}.crl",
ProcessorGeneration::current()?.to_kds_url()
)))?;
file.write_all(&bytes)
.context("Failed to write CRL to directory specified!")
}
pub fn fetch(url: &str) -> Result<Vec<u8>> {
let mut handle = Easy::new();
let mut buf: Vec<u8> = Vec::new();
handle.url(url)?;
handle.get(true)?;
let mut transfer = handle.transfer();
transfer.write_function(|data| {
buf.extend_from_slice(data);
Ok(data.len())
})?;
transfer.perform()?;
drop(transfer);
Ok(buf)
}
07070100000017000081A400000000000000000000000166DA69EB0000021D000000000000000000000000000000000000002400000000snphost-0.5.0/src/cert/fetch/mod.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
pub(crate) mod ca;
pub(crate) mod crl;
pub(crate) mod vcek;
use anyhow::Result;
#[derive(Subcommand)]
pub enum Fetch {
/// Fetches the VCEK from the KDS
Vcek(vcek::Vcek),
/// Fetches the CA from the KDS
Ca(ca::Ca),
/// Fetches the CRL from the KDS
Crl(crl::Crl),
}
pub fn cmd(fetch: Fetch) -> Result<()> {
match fetch {
Fetch::Vcek(vcek) => vcek::cmd(vcek),
Fetch::Ca(ca) => ca::cmd(ca),
Fetch::Crl(crl) => crl::cmd(crl),
}
}
07070100000018000081A400000000000000000000000166DA69EB00000945000000000000000000000000000000000000002500000000snphost-0.5.0/src/cert/fetch/vcek.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
use std::{
fs::{create_dir_all, OpenOptions},
io::Write,
path::PathBuf,
};
use crate::{firmware, processor::ProcessorGeneration, snp_platform_status};
use anyhow::{Context, Result};
use curl::easy::Easy;
use sev::certs::snp::Certificate;
#[derive(Parser)]
pub struct Vcek {
/// The format in which to encode the certificate
#[arg(value_name = "encoding", required = true)]
encoding_fmt: EncodingFormat,
/// The path of a directory to store the encoded VCEK in
#[arg(value_name = "path", required = true)]
path: PathBuf,
}
pub fn cmd(vcek: Vcek) -> Result<()> {
let url = vcek_url()?;
let cert = fetch(&url).context(format!("unable to fetch VCEK from {}", url))?;
let (vcek_name, vcek_bytes) = match vcek.encoding_fmt {
EncodingFormat::Der => ("vcek.der", cert.to_der()?),
EncodingFormat::Pem => ("vcek.pem", cert.to_pem()?),
};
// Create Directory if not exists first, then write the files.
if !vcek.path.exists() {
create_dir_all(&vcek.path)?;
}
let mut file = OpenOptions::new()
.create(true)
.truncate(true)
.write(true)
.open(vcek.path.join(vcek_name))?;
file.write_all(&vcek_bytes)?;
Ok(())
}
pub fn fetch(url: &str) -> Result<Certificate> {
let mut handle = Easy::new();
let mut buf: Vec<u8> = Vec::new();
handle.url(url)?;
handle.get(true)?;
let mut transfer = handle.transfer();
transfer.write_function(|data| {
buf.extend_from_slice(data);
Ok(data.len())
})?;
transfer.perform()?;
drop(transfer);
Ok(Certificate::from_der(buf.as_slice())?)
}
pub fn vcek_url() -> Result<String> {
let id = firmware()?
.get_identifier()
.map_err(|e| anyhow::anyhow!(format!("{:?}", e)))
.context("error fetching identifier")?;
let status = snp_platform_status()?;
let gen = ProcessorGeneration::current()?.to_kds_url();
Ok(format!("https://kdsintf.amd.com/vcek/v1/{}/{}?blSPL={:02}&teeSPL={:02}&snpSPL={:02}&ucodeSPL={:02}",
gen, id, status.reported_tcb_version.bootloader,
status.reported_tcb_version.tee,
status.reported_tcb_version.snp,
status.reported_tcb_version.microcode))
}
07070100000019000081A400000000000000000000000166DA69EB00000A96000000000000000000000000000000000000002100000000snphost-0.5.0/src/cert/import.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
use sev::firmware::host::{CertTableEntry, CertType};
use std::{
fs::{read, read_dir, DirEntry, File},
io::Write,
path::PathBuf,
};
use anyhow::{bail, Context, Result};
#[derive(Parser)]
pub struct Import {
/// The directory where the certificates are stored
#[arg(value_name = "dir-path", required = true)]
pub dir_path: PathBuf,
/// File where the formatted certificates will be stored.
#[arg(value_name = "cert-file", required = true)]
pub cert_file: PathBuf,
}
pub fn cmd(import: Import) -> Result<()> {
if !import.dir_path.exists() {
bail!(format!("path {} does not exist", import.dir_path.display()));
}
let mut table: Vec<CertTableEntry> = vec![];
// For each cert in the directory convert into a kernel formatted cert and write into file
for dir_entry in read_dir(import.dir_path.clone())? {
match dir_entry {
Ok(de) => table_add_entry(de, &mut table)?,
Err(_) => {
bail!(format!(
"unable to read directory at path {}",
import.dir_path.display()
))
}
}
}
let cert_bytes = CertTableEntry::cert_table_to_vec_bytes(&table)
.context("Failed to convert certificates to GHCB bytes specification.")?;
// Write cert into directory
let mut file = if import.cert_file.exists() {
std::fs::OpenOptions::new()
.write(true)
.truncate(true)
.open(import.cert_file)
.context("Unable to overwrite kernel cert file contents")?
} else {
File::create(import.cert_file).context("Unable to create kernel cert file")?
};
file.write(&cert_bytes)
.context(format!("unable to write data to file {:?}", file))?;
Ok(())
}
fn table_add_entry(de: DirEntry, table: &mut Vec<CertTableEntry>) -> Result<()> {
match entry_get_type(&de.path())? {
Some(cert_type) => {
let data = read(de.path())?;
table.push(CertTableEntry::new(cert_type, data));
Ok(())
}
None => Ok(()),
}
}
fn entry_get_type(path: &PathBuf) -> Result<Option<CertType>> {
let file_name_string = path
.file_name()
.context(format!("unable to read file at path {:?}", path))?
.to_string_lossy()
.into_owned();
let subs: Vec<&str> = file_name_string.split('.').collect();
match subs[0] {
"ark" => Ok(Some(CertType::ARK)),
"ask" => Ok(Some(CertType::ASK)),
"vlek" => Ok(Some(CertType::VLEK)),
"vcek" => Ok(Some(CertType::VCEK)),
_ => Ok(None),
}
}
0707010000001A000081A400000000000000000000000166DA69EB000003D4000000000000000000000000000000000000001E00000000snphost-0.5.0/src/cert/mod.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
pub(crate) mod export;
pub(crate) mod fetch;
pub(crate) mod import;
pub(crate) mod verify;
use std::str::FromStr;
use anyhow::{anyhow, Error};
#[derive(ValueEnum, Copy, Clone)]
pub enum EncodingFormat {
/// Certificates are encoded in DER format
Der,
/// Certificates are encoded in PEM format
Pem,
}
impl std::fmt::Display for EncodingFormat {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{}",
match self {
Self::Der => "der",
Self::Pem => "pem",
}
)
}
}
impl FromStr for EncodingFormat {
type Err = Error;
fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
match s {
"der" => Ok(Self::Der),
"pem" => Ok(Self::Pem),
_ => Err(anyhow!("unrecognized certificate encoding format")),
}
}
}
0707010000001B000081A400000000000000000000000166DA69EB00000C85000000000000000000000000000000000000002100000000snphost-0.5.0/src/cert/verify.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
use anyhow::{anyhow, Context, Result};
use std::{
fs::read,
path::{Path, PathBuf},
};
use colorful::*;
use sev::certs::snp::{ca, Certificate, Chain, Verifiable};
pub fn find_cert_in_dir(dir: &Path, cert: &str) -> Result<PathBuf, anyhow::Error> {
if dir.join(format!("{cert}.pem")).exists() {
Ok(dir.join(format!("{cert}.pem")))
} else if dir.join(format!("{cert}.der")).exists() {
Ok(dir.join(format!("{cert}.der")))
} else {
return Err(anyhow::anyhow!("{cert} certificate not found in directory"));
}
}
#[derive(Parser)]
pub struct Verify {
/// Path to directory containing certificates.
#[arg(value_name = "dir-path", required = true)]
pub dir_path: PathBuf,
}
pub fn cmd(verify: Verify, quiet: bool) -> Result<()> {
let ark_path = find_cert_in_dir(&verify.dir_path, "ark")?;
let ask_path = find_cert_in_dir(&verify.dir_path, "ask")?;
let mut vek_type: &str = "VCEK";
let vek_path = match find_cert_in_dir(&verify.dir_path, "vlek") {
Ok(vlek_path) => {
vek_type = "VLEK";
vlek_path
}
Err(_) => find_cert_in_dir(&verify.dir_path, "vcek")?,
};
// Get a cert chain from directory
let cert_chain = chain(ark_path, ask_path, vek_path, vek_type)?;
let ark = (&cert_chain.ca.ark, "ARK");
let ask = (&cert_chain.ca.ask, "ASK");
let vek = (&cert_chain.vek, vek_type);
let mut err = true;
if !quiet {
println!("\n • = self signed, ⬑ = signs, •̷ = invalid self sign, ⬑̸ = invalid signs\n");
}
err |= status(ark, ark, true, quiet);
err |= status(ark, ask, false, quiet);
err |= status(ask, vek, false, quiet);
match err {
true => Ok(()),
false => Err(anyhow!("SEV-SNP/CA certificate verification failed")),
}
}
fn status<'a, S>(
signer: (&'a S, &str),
signee: (&'a S, &str),
self_signed: bool,
quiet: bool,
) -> bool
where
(&'a S, &'a S): Verifiable,
{
let res = (signer.0, signee.0).verify().is_ok();
if !quiet {
println!("{}", ssym(res, self_signed, signer.1, signee.1));
}
res
}
fn ssym(res: bool, self_signed: bool, signer: &str, signee: &str) -> String {
let sym = match (res, self_signed) {
(true, true) => "•".green(),
(true, false) => "⬑".green(),
(false, true) => "•̷".red(),
(false, false) => "⬑̸".red(),
};
match self_signed {
true => format!("{} {}", signer, sym),
false => format!("{} {} {}", signer, sym, signee),
}
}
fn chain(ark_path: PathBuf, ask_path: PathBuf, vek_path: PathBuf, vek_type: &str) -> Result<Chain> {
Ok(Chain {
ca: ca::Chain {
ark: cert(ark_path, "ARK")?,
ask: cert(ask_path, "ASK")?,
},
vek: cert(vek_path, vek_type)?,
})
}
fn cert(path: PathBuf, name: &str) -> Result<Certificate> {
Certificate::from_bytes(
&read(path.clone()).context(format!("unable to read {}", path.display()))?,
)
.context(format!(
"unable to parse {} certificate from {}",
name,
path.display()
))
}
0707010000001C000081A400000000000000000000000166DA69EB00000941000000000000000000000000000000000000001C00000000snphost-0.5.0/src/config.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
// Different config commands
#[derive(Subcommand)]
pub enum ConfigCmd {
/// Change the Platform Config (TCB and Mask chip) to the provided values
Set(set::Args),
/// Reset the SEV-SNP Config to the last comitted version
#[command(subcommand)]
Reset,
}
pub fn cmd(cmd: ConfigCmd) -> Result<()> {
match cmd {
ConfigCmd::Set(args) => set::set_config(args),
ConfigCmd::Reset => reset::reset_config(),
}
}
mod set {
use super::*;
#[derive(Parser)]
pub struct Args {
/// Bootloader version
/// (Unsigned 8-bit Integer)
#[arg(value_name = "bootloader", required = true)]
pub bootloader: u8,
/// PSP OS version (Unsigned 8-bit Integer)
#[arg(value_name = "tee", required = true)]
pub tee: u8,
/// Version of the SNP firmware (Unsigned 8-bit Integer)
#[arg(value_name = "snp-fw", required = true)]
pub snp_fw: u8,
/// Microcode Patch level of all the cores (Unsigned 8-bit Integer)
#[arg(value_name = "microcode", required = true)]
pub microcode: u8,
/// Change mask chip bit field (Unsigned 32-bit Integer) values by providing decimal representation of desired change (0-3). Bit[0]: CHIP_ID, Bit[1]: CHIP_KEY. Both are disabled by default
#[arg(value_name = "mask-chip", required = true)]
mask_chip: u32,
}
pub fn set_config(args: Args) -> Result<()> {
// Create Tcb with provided values
let tcb = TcbVersion::new(args.bootloader, args.tee, args.snp_fw, args.microcode);
// Create Mask Chip with provided value
let mask_chip = MaskId(args.mask_chip);
// Create new Config
let config = Config::new(tcb, mask_chip);
// Change Config
let mut fw = firmware()?;
fw.snp_set_config(config)
.map_err(|e| anyhow::anyhow!(format!("{:?}", e)))
.context("Error setting a new snp config")
}
}
mod reset {
use super::*;
pub fn reset_config() -> Result<()> {
let mut fw = firmware()?;
// Provide confing to set_config with all 0s
fw.snp_set_config(Config::default())
.map_err(|e| anyhow::anyhow!(format!("{:?}", e)))
.context("Error resetting SEV-SNP configuration")
}
}
0707010000001D000081A400000000000000000000000166DA69EB00000AAC000000000000000000000000000000000000001A00000000snphost-0.5.0/src/main.rs// SPDX-License-Identifier: Apache-2.0
#![deny(clippy::all)]
mod cert;
mod config;
mod processor;
mod show;
mod ok;
use cert::{export, fetch, import, verify};
use anyhow::{Context, Result};
use clap::{arg, Parser, Subcommand, ValueEnum};
use sev::firmware::host::*;
#[derive(Parser)]
#[command(author, version, about, long_about = None)]
struct SnpHost {
#[command(subcommand)]
pub cmd: SnpHostCmd,
/// Don't print anything to the console
#[arg(short, long, default_value_t = false)]
pub quiet: bool,
}
#[allow(clippy::large_enum_variant)]
/// Utilities for managing the SEV-SNP environment
#[derive(Subcommand)]
enum SnpHostCmd {
/// Display information about the SEV-SNP platform
#[command(subcommand)]
Show(show::Show),
/// Export a certificate chain from a kernel format file to a given directory
Export(export::Export),
/// Import a certificate chain to a file
Import(import::Import),
/// Probe system for SEV-SNP support
Ok,
/// Modify the SNP configuration
#[command(subcommand)]
Config(config::ConfigCmd),
/// Verify a certificate chain
Verify(verify::Verify),
/// Retrieve content from the AMD Key Distribution Server (KDS)
#[command(subcommand)]
Fetch(fetch::Fetch),
/// Commit current firmware and TCB versions to PSP
Commit,
}
// Commit command
mod commit {
use super::*;
pub fn cmd() -> Result<()> {
firmware()?.snp_commit()?;
Ok(())
}
}
fn firmware() -> Result<Firmware> {
Firmware::open().context("unable to open /dev/sev")
}
fn snp_platform_status() -> Result<SnpPlatformStatus> {
firmware()?
.snp_platform_status()
.map_err(|e| anyhow::anyhow!(format!("{:?}", e)))
.context("unable to retrieve SNP platform status")
}
fn sev_platform_status() -> Result<Status> {
firmware()?
.platform_status()
.map_err(|e| anyhow::anyhow!(format!("{:?}", e)))
.context("unable to retrieve SEV platform status")
}
fn main() -> Result<()> {
env_logger::init();
let snphost = SnpHost::parse();
let result = match snphost.cmd {
SnpHostCmd::Show(show) => show::cmd(show),
SnpHostCmd::Export(export) => export::cmd(export),
SnpHostCmd::Import(import) => import::cmd(import),
SnpHostCmd::Ok => ok::cmd(snphost.quiet),
SnpHostCmd::Config(subcmd) => config::cmd(subcmd),
SnpHostCmd::Verify(verify) => verify::cmd(verify, snphost.quiet),
SnpHostCmd::Fetch(fetch) => fetch::cmd(fetch),
SnpHostCmd::Commit => commit::cmd(),
};
if !snphost.quiet {
if let Err(ref e) = result {
eprintln!("ERROR: {}", e);
}
}
result
}
0707010000001E000081A400000000000000000000000166DA69EB00007D92000000000000000000000000000000000000001800000000snphost-0.5.0/src/ok.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
use std::{
arch::x86_64,
fmt,
fs::{self, File},
mem::{transmute, MaybeUninit},
os::unix::io::AsRawFd,
str::from_utf8,
};
use colorful::*;
use msru::{Accessor, Msr};
type TestFn = dyn Fn() -> TestResult;
// SEV generation-specific bitmasks.
const SEV_MASK: usize = 1;
const ES_MASK: usize = 1 << 1;
const SNP_MASK: usize = 1 << 2;
struct Test {
name: &'static str,
gen_mask: usize,
run: Box<TestFn>,
sub: Vec<Test>,
}
struct TestResult {
name: String,
stat: TestState,
mesg: Option<String>,
}
#[derive(PartialEq, Eq)]
enum TestState {
Pass,
Skip,
Fail,
}
enum SevGeneration {
Sev,
Es,
Snp,
}
impl fmt::Display for TestState {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let s = match self {
TestState::Pass => format!("{}", "PASS".green()),
TestState::Skip => format!("{}", "SKIP".yellow()),
TestState::Fail => format!("{}", "FAIL".red()),
};
write!(f, "{}", s)
}
}
enum SnpStatusTest {
Tcb,
Rmp,
Snp,
}
enum SevStatusTests {
Sev,
Firmware,
Seves,
}
impl fmt::Display for SnpStatusTest {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let s = match self {
SnpStatusTest::Tcb => "Comparing TCB values",
SnpStatusTest::Rmp => "RMP INIT",
SnpStatusTest::Snp => "SNP INIT",
};
write!(f, "{}", s)
}
}
impl fmt::Display for SevStatusTests {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let s = match self {
SevStatusTests::Sev => "SEV INIT",
SevStatusTests::Firmware => "SEV Firmware Version",
SevStatusTests::Seves => "SEV-ES INIT",
};
write!(f, "{}", s)
}
}
fn collect_tests() -> Vec<Test> {
let tests = vec![
Test {
name: "AMD CPU",
gen_mask: SEV_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x0000_0000) };
let name: [u8; 12] = unsafe { transmute([res.ebx, res.edx, res.ecx]) };
let name = from_utf8(&name[..]).unwrap_or("ERROR_FOUND");
let stat = if name == "AuthenticAMD" {
TestState::Pass
} else {
TestState::Fail
};
TestResult {
name: "AMD CPU".to_string(),
stat,
mesg: None,
}
}),
sub: vec![
Test {
name: "Microcode support",
gen_mask: SEV_MASK,
run: Box::new(|| {
let cpu_name = {
let mut bytestr = Vec::with_capacity(48);
for cpuid in 0x8000_0002_u32..=0x8000_0004_u32 {
let cpuid = unsafe { x86_64::__cpuid(cpuid) };
let mut bytes: Vec<u8> =
[cpuid.eax, cpuid.ebx, cpuid.ecx, cpuid.edx]
.iter()
.flat_map(|r| r.to_le_bytes().to_vec())
.collect();
bytestr.append(&mut bytes);
}
String::from_utf8(bytestr)
.unwrap_or_else(|_| "ERROR_FOUND".to_string())
.trim()
.to_string()
};
let stat = if cpu_name.to_uppercase().contains("EPYC") {
TestState::Pass
} else {
TestState::Fail
};
TestResult {
name: "Microcode support".to_string(),
stat,
mesg: None,
}
}),
sub: vec![],
},
Test {
name: "Secure Memory Encryption (SME)",
gen_mask: SEV_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let stat = if (res.eax & 0x1) != 0 {
TestState::Pass
} else {
TestState::Fail
};
TestResult {
name: "Secure Memory Encryption (SME)".to_string(),
stat,
mesg: None,
}
}),
sub: vec![Test {
name: "SME",
gen_mask: SEV_MASK,
run: Box::new(sme_test),
sub: vec![],
}],
},
Test {
name: "Secure Encrypted Virtualization (SEV)",
gen_mask: SEV_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let stat = if (res.eax & 0x1 << 1) != 0 {
TestState::Pass
} else {
TestState::Fail
};
TestResult {
name: "Secure Encrypted Virtualization (SEV)".to_string(),
stat,
mesg: None,
}
}),
sub: vec![
Test {
name: "Encrypted State (SEV-ES)",
gen_mask: ES_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let stat = if (res.eax & 0x1 << 3) != 0 {
TestState::Pass
} else {
TestState::Fail
};
TestResult {
name: "Encrypted State (SEV-ES)".to_string(),
stat,
mesg: None,
}
}),
sub: vec![Test {
name: "SEV-ES INIT",
gen_mask: ES_MASK,
run: Box::new(|| sev_ioctl(SevStatusTests::Seves)),
sub: vec![],
}],
},
Test {
name: "SEV INIT",
gen_mask: SNP_MASK,
run: Box::new(|| sev_ioctl(SevStatusTests::Sev)),
sub: vec![],
},
Test {
name: "Secure Nested Paging (SEV-SNP)",
gen_mask: SNP_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let stat = if (res.eax & 0x1 << 4) != 0 {
TestState::Pass
} else {
TestState::Fail
};
TestResult {
name: "Secure Nested Paging (SEV-SNP)".to_string(),
stat,
mesg: None,
}
}),
sub: vec![
Test {
name: "VM Permission Levels",
gen_mask: SNP_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let stat = if (res.eax & 0x1 << 5) != 0 {
TestState::Pass
} else {
TestState::Fail
};
TestResult {
name: "VM Permission Levels".to_string(),
stat,
mesg: None,
}
}),
sub: vec![Test {
name: "Number of VMPLs",
gen_mask: SNP_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let num_vmpls = (res.ebx & 0xF000) >> 12;
TestResult {
name: "Number of VMPLs".to_string(),
stat: TestState::Pass,
mesg: Some(format!("{}", num_vmpls)),
}
}),
sub: vec![],
}],
},
Test {
name: "SEV-SNP",
gen_mask: SNP_MASK,
run: Box::new(snp_test),
sub: vec![],
},
Test {
name: "SEV Firmware Version",
gen_mask: SNP_MASK,
run: Box::new(|| sev_ioctl(SevStatusTests::Firmware)),
sub: vec![],
},
Test {
name: "SNP INIT",
gen_mask: SNP_MASK,
run: Box::new(|| snp_ioctl(SnpStatusTest::Snp)),
sub: vec![],
},
],
},
Test {
name: "Physical address bit reduction",
gen_mask: SEV_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let field = (res.ebx & 0b1111_1100_0000) >> 6;
TestResult {
name: "Physical address bit reduction".to_string(),
stat: TestState::Pass,
mesg: Some(format!("{}", field)),
}
}),
sub: vec![],
},
Test {
name: "C-bit location",
gen_mask: SEV_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let field = res.ebx & 0b11_1111;
TestResult {
name: "C-bit location".to_string(),
stat: TestState::Pass,
mesg: Some(format!("{}", field)),
}
}),
sub: vec![],
},
Test {
name: "Number of encrypted guests supported simultaneously",
gen_mask: SEV_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let field = res.ecx;
TestResult {
name: "Number of encrypted guests supported simultaneously"
.to_string(),
stat: TestState::Pass,
mesg: Some(format!("{}", field)),
}
}),
sub: vec![],
},
Test {
name: "Minimum ASID value for SEV-enabled, SEV-ES disabled guest",
gen_mask: SEV_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let field = res.edx;
TestResult {
name:
"Minimum ASID value for SEV-enabled, SEV-ES disabled guest"
.to_string(),
stat: TestState::Pass,
mesg: Some(format!("{}", field)),
}
}),
sub: vec![],
},
Test {
name: "/dev/sev readable",
gen_mask: SEV_MASK,
run: Box::new(dev_sev_r),
sub: vec![],
},
Test {
name: "/dev/sev writable",
gen_mask: SEV_MASK,
run: Box::new(dev_sev_w),
sub: vec![],
},
],
},
Test {
name: "Page flush MSR",
gen_mask: SEV_MASK,
run: Box::new(|| {
let res = unsafe { x86_64::__cpuid(0x8000_001f) };
let msr_flag = if (res.eax & 0x1 << 2) != 0 {
"ENABLED".green()
} else {
"DISABLED".yellow()
};
let name = format!("Page flush MSR: {}", msr_flag);
TestResult {
name,
/*
* Page flush MSR can be enabled/disabled.
* Therefore, if the flag is disabled, it doesn't
* necessarily mean that Page flush MSR *isn't*
* supported, but rather that it is supported yet
* currently disabled. So instead of returning
* TestState::Fail (indicating that Page flush MSR
* isn't supported), return TestState::Pass and
* indicate to the caller whether it is enabled or
* disabled.
*/
stat: TestState::Pass,
mesg: None,
}
}),
sub: vec![],
},
],
},
Test {
name: "KVM Support",
gen_mask: SEV_MASK,
run: Box::new(has_kvm_support),
sub: vec![
Test {
name: "SEV enabled in KVM",
gen_mask: SEV_MASK,
run: Box::new(|| sev_enabled_in_kvm(SevGeneration::Sev)),
sub: vec![],
},
Test {
name: "SEV-ES enabled in KVM",
gen_mask: ES_MASK,
run: Box::new(|| sev_enabled_in_kvm(SevGeneration::Es)),
sub: vec![],
},
Test {
name: "SEV-SNP enabled in KVM",
gen_mask: SNP_MASK,
run: Box::new(|| sev_enabled_in_kvm(SevGeneration::Snp)),
sub: vec![],
},
],
},
Test {
name: "memlock limit",
gen_mask: SEV_MASK,
run: Box::new(memlock_rlimit),
sub: vec![],
},
Test {
name: "Read RMP tables",
gen_mask: SNP_MASK,
run: Box::new(get_rmp_address),
sub: vec![],
},
Test {
name: "RMP INIT",
gen_mask: SNP_MASK,
run: Box::new(|| snp_ioctl(SnpStatusTest::Rmp)),
sub: vec![],
},
Test {
name: "Compare TCB values",
gen_mask: SNP_MASK,
run: Box::new(|| snp_ioctl(SnpStatusTest::Tcb)),
sub: vec![],
},
];
tests
}
const INDENT: usize = 2;
pub fn cmd(quiet: bool) -> Result<()> {
let tests = collect_tests();
if run_test(&tests, 0, quiet, SEV_MASK | ES_MASK | SNP_MASK) {
Ok(())
} else {
Err(anyhow::anyhow!(
"One or more tests in sevctl-ok reported a failure"
))
}
}
fn run_test(tests: &[Test], level: usize, quiet: bool, mask: usize) -> bool {
let mut passed = true;
for t in tests {
// Skip tests that aren't included in the specified generation.
if (t.gen_mask & mask) != t.gen_mask {
test_gen_not_included(t, level, quiet);
continue;
}
let res = (t.run)();
emit_result(&res, level, quiet);
match res.stat {
TestState::Pass => {
if !run_test(&t.sub, level + INDENT, quiet, mask) {
passed = false;
}
}
TestState::Fail => {
passed = false;
emit_skip(&t.sub, level + INDENT, quiet);
}
// Skipped tests are marked as skip before recursing. They are just emitted and not actually processed.
TestState::Skip => unreachable!(),
}
}
passed
}
fn emit_result(res: &TestResult, level: usize, quiet: bool) {
if !quiet {
let msg = match &res.mesg {
Some(m) => format!(": {}", m),
None => "".to_string(),
};
println!(
"[ {:^4} ] {:width$}- {}{}",
format!("{}", res.stat),
"",
res.name,
msg,
width = level
)
}
}
fn test_gen_not_included(test: &Test, level: usize, quiet: bool) {
if !quiet {
let tr_skip = TestResult {
name: test.name.to_string(),
stat: TestState::Skip,
mesg: None,
};
println!(
"[ {:^4} ] {:width$}- {}",
format!("{}", tr_skip.stat),
"",
tr_skip.name,
width = level
);
emit_skip(&test.sub, level + INDENT, quiet);
}
}
fn emit_skip(tests: &[Test], level: usize, quiet: bool) {
if !quiet {
for t in tests {
let tr_skip = TestResult {
name: t.name.to_string(),
stat: TestState::Skip,
mesg: None,
};
println!(
"[ {:^4} ] {:width$}- {}",
format!("{}", tr_skip.stat),
"",
tr_skip.name,
width = level
);
emit_skip(&t.sub, level + INDENT, quiet);
}
}
}
fn dev_sev_r() -> TestResult {
let (stat, mesg) = match dev_sev_rw(fs::OpenOptions::new().read(true)) {
Ok(_) => (TestState::Pass, "/dev/sev readable".to_string()),
Err(e) => (TestState::Fail, format!("/dev/sev not readable: {}", e)),
};
TestResult {
name: "Reading /dev/sev".to_string(),
stat,
mesg: Some(mesg),
}
}
fn dev_sev_w() -> TestResult {
let (stat, mesg) = match dev_sev_rw(fs::OpenOptions::new().write(true)) {
Ok(_) => (TestState::Pass, "/dev/sev writable".to_string()),
Err(e) => (TestState::Fail, format!("/dev/sev not writable: {}", e)),
};
TestResult {
name: "Writing /dev/sev".to_string(),
stat,
mesg: Some(mesg),
}
}
fn dev_sev_rw(file: &fs::OpenOptions) -> Result<()> {
let path = "/dev/sev";
match file.open(path) {
Ok(_) => Ok(()),
Err(e) => Err(anyhow::Error::new(Box::new(e))),
}
}
fn has_kvm_support() -> TestResult {
let path = "/dev/kvm";
let (stat, mesg) = match File::open(path) {
Ok(kvm) => {
let api_version = unsafe { libc::ioctl(kvm.as_raw_fd(), 0xAE00, 0) };
if api_version < 0 {
(
TestState::Fail,
"Error - accessing KVM device node failed".to_string(),
)
} else {
(TestState::Pass, format!("API version: {}", api_version))
}
}
Err(e) => (TestState::Fail, format!("Error reading {}: ({})", path, e)),
};
TestResult {
name: "KVM supported".to_string(),
stat,
mesg: Some(mesg),
}
}
fn sev_enabled_in_kvm(gen: SevGeneration) -> TestResult {
let path_loc = match gen {
SevGeneration::Sev => "/sys/module/kvm_amd/parameters/sev",
SevGeneration::Es => "/sys/module/kvm_amd/parameters/sev_es",
SevGeneration::Snp => "/sys/module/kvm_amd/parameters/sev_snp",
};
let path = std::path::Path::new(path_loc);
let (stat, mesg) = if path.exists() {
match std::fs::read_to_string(path_loc) {
Ok(result) => {
if result.trim() == "1" || result.trim() == "Y" {
(TestState::Pass, "enabled".to_string())
} else {
(
TestState::Fail,
format!("Error - contents read from {}: {}", path_loc, result.trim()),
)
}
}
Err(e) => (
TestState::Fail,
format!("Error - (unable to read {}): {}", path_loc, e,),
),
}
} else {
(
TestState::Fail,
format!("Error - {} does not exist", path_loc),
)
};
TestResult {
name: match gen {
SevGeneration::Sev => "SEV enabled in KVM",
SevGeneration::Es => "SEV-ES enabled in KVM",
SevGeneration::Snp => "SEV-SNP enabled in KVM",
}
.to_string(),
stat,
mesg: Some(mesg),
}
}
fn memlock_rlimit() -> TestResult {
let mut rlimit = MaybeUninit::uninit();
let res = unsafe { libc::getrlimit(libc::RLIMIT_MEMLOCK, rlimit.as_mut_ptr()) };
let (stat, mesg) = if res == 0 {
let r = unsafe { rlimit.assume_init() };
(
TestState::Pass,
format!("Soft: {} | Hard: {}", r.rlim_cur, r.rlim_max),
)
} else {
(
TestState::Fail,
"Unable to retrieve memlock resource limits".to_string(),
)
};
TestResult {
name: "Memlock resource limit".to_string(),
stat,
mesg: Some(mesg),
}
}
fn msr_bit_read(reg: u32, cpu: u16) -> Result<u64, anyhow::Error> {
let mut msr = Msr::new(reg, cpu).context("Error Reading MSR")?;
let raw_value = msr.read()?;
Ok(raw_value)
}
fn sme_test() -> TestResult {
let raw_value = match msr_bit_read(0xC0010010, 0) {
Ok(raw) => raw,
Err(e) => {
return TestResult {
name: "SME".to_string(),
stat: TestState::Fail,
mesg: format!("MSR read failed: {}", e).into(),
}
}
};
let (testres, mesg) = match raw_value >> 23 & 1 {
1 => (TestState::Pass, "Enabled in MSR"),
0 => (TestState::Fail, "Disabled in MSR"),
_ => unreachable!(),
};
TestResult {
name: "SME".to_string(),
stat: testres,
mesg: Some(mesg.to_string()),
}
}
fn snp_test() -> TestResult {
let raw_value = match msr_bit_read(0xC0010010, 0) {
Ok(raw) => raw,
Err(e) => {
return TestResult {
name: "SNP".to_string(),
stat: TestState::Fail,
mesg: format!("MSR read failed: {}", e).into(),
}
}
};
let (testres, mesg) = match raw_value >> 24 & 1 {
1 => (TestState::Pass, "Enabled in MSR"),
0 => (TestState::Fail, "Disabled in MSR"),
_ => unreachable!(),
};
TestResult {
name: "SNP".to_string(),
stat: testres,
mesg: Some(mesg.to_string()),
}
}
fn get_rmp_address() -> TestResult {
let rmp_base = match msr_bit_read(0xC0010132, 0) {
Ok(raw) => raw,
Err(e) => {
return TestResult {
name: "Reading RMP table".to_string(),
stat: TestState::Fail,
mesg: format!("Failed to read the desired MSR: {}", e).into(),
}
}
};
let rmp_end = match msr_bit_read(0xC0010133, 0) {
Ok(raw) => raw,
Err(e) => {
return TestResult {
name: "Reading RMP table".to_string(),
stat: TestState::Fail,
mesg: format!("Failed to read the desired MSR: {}", e).into(),
}
}
};
if rmp_base == 0 || rmp_end == 0 {
TestResult {
name: "Reading RMP table".to_string(),
stat: TestState::Fail,
mesg: Some("RMP table was not read successfully".into()),
}
} else {
TestResult {
name: "RMP table addresses".to_string(),
stat: TestState::Pass,
mesg: format!("Addresses: {} - {}", rmp_base, rmp_end).into(),
}
}
}
fn snp_ioctl(test: SnpStatusTest) -> TestResult {
let status = match snp_platform_status() {
Ok(stat) => stat,
Err(e) => {
return TestResult {
name: test.to_string(),
stat: TestState::Fail,
mesg: Some(format!("Failed to get SNP Platform status {e}")),
}
}
};
match test {
SnpStatusTest::Tcb => {
if status.platform_tcb_version == status.reported_tcb_version {
TestResult{
name: format!("{}", SnpStatusTest::Tcb),
stat: TestState::Pass,
mesg: format!("TCB versions match \n\n Platform TCB version: {} \n Reported TCB version: {}",
status.platform_tcb_version, status.reported_tcb_version).into()
}
} else {
TestResult {
name: format!("{}", SnpStatusTest::Tcb),
stat: TestState::Fail,
mesg: format!("The TCB versions did NOT match \n\n Platform TCB version: {} \n Reported TCB version: {}",
status.platform_tcb_version, status.reported_tcb_version).into(),
}
}
}
SnpStatusTest::Rmp => {
if status.is_rmp_init == 1 {
TestResult {
name: format!("{}", SnpStatusTest::Rmp),
stat: TestState::Pass,
mesg: Some("RMP is INIT".to_string()),
}
} else {
TestResult {
name: format!("{}", SnpStatusTest::Rmp),
stat: TestState::Fail,
mesg: Some("RMP is UNINIT".to_string()),
}
}
}
SnpStatusTest::Snp => {
if status.state == 1 {
TestResult {
name: format!("{}", SnpStatusTest::Snp),
stat: TestState::Pass,
mesg: Some("SNP is INIT".to_string()),
}
} else {
TestResult {
name: format!("{}", SnpStatusTest::Snp),
stat: TestState::Fail,
mesg: Some("SNP is UNINIT".to_string()),
}
}
}
}
}
fn sev_ioctl(test: SevStatusTests) -> TestResult {
let status = match sev_platform_status() {
Ok(stat) => stat,
Err(e) => {
return TestResult {
name: test.to_string(),
stat: TestState::Fail,
mesg: Some(format!("Failed to get SEV Platform Status {e}")),
}
}
};
match test {
SevStatusTests::Sev => {
if status.state == State::Working {
TestResult {
name: format!("{}", SevStatusTests::Sev),
stat: TestState::Pass,
mesg: Some("SEV is INIT and currently running a guest".to_string()),
}
} else if status.state == State::Initialized {
TestResult {
name: format!("{}", SevStatusTests::Sev),
stat: TestState::Pass,
mesg: Some("SEV is INIT, but not currently running a guest".to_string()),
}
} else {
TestResult {
name: format!("{}", SevStatusTests::Sev),
stat: TestState::Fail,
mesg: Some("SEV is UNINIT".to_string()),
}
}
}
SevStatusTests::Firmware => {
if status.build.version == 0.into() {
TestResult {
name: format!("{}", SevStatusTests::Firmware),
stat: TestState::Fail,
mesg: Some(format!(
"Invalid Firmware version: {}",
status.build.version
)),
}
} else if status.build.version.minor < 51 {
TestResult {
name: format!("{}", SevStatusTests::Firmware),
stat: TestState::Fail,
mesg: format!(
"SEV firmware version needs to be at least 1.51,
current firmware version: {}",
status.build.version
)
.into(),
}
} else {
TestResult {
name: format!("{}", SevStatusTests::Firmware),
stat: TestState::Pass,
mesg: format!("Sev firmware version: {}", status.build.version).into(),
}
}
}
SevStatusTests::Seves => {
let (res, mesg) = match status.flags.bits() >> 8 & 1 {
1 => (TestState::Pass, "Enabled"),
0 => (TestState::Fail, "Disabled"),
_ => unreachable!(),
};
TestResult {
name: format!("{}", SevStatusTests::Seves),
stat: res,
mesg: Some(mesg.to_string()),
}
}
}
}
0707010000001F000081A400000000000000000000000166DA69EB00000CFB000000000000000000000000000000000000001F00000000snphost-0.5.0/src/processor.rs// SPDX-License-Identifier: Apache-2.0
use anyhow::{anyhow, Result};
use std::arch::x86_64;
pub enum ProcessorGeneration {
Milan,
Genoa,
Bergamo,
Siena,
Turin,
}
impl ProcessorGeneration {
// Get the SEV generation of the processor currently running on the machine.
// To do this, we execute a CPUID (label 0x80000001) and read the EAX
// register as an array of bytes (each byte representing 8 bits of a 32-bit
// value, thus the array is 4 bytes long). The formatting for these values is
// as follows:
//
// Base model: bits 4:7
// Base family: bits 8:11
// Extended model: bits 16:19
// Extended family: bits 20:27
//
// Extract the bit values from the array, and use them to calculate the MODEL
// and FAMILY of the processor.
//
// The family calculation is as follows:
//
// FAMILY = Base family + Extended family
//
// The model calculation is a follows:
//
// MODEL = Base model | (Extended model << 4)
//
// Compare these values with the models and families of known processor generations to
// determine which generation the current processor is a part of.
pub(crate) fn current() -> Result<Self> {
let cpuid = unsafe { x86_64::__cpuid(0x8000_0001) };
// Bits 31:28 are used to differentiate between Bergamo and Siena machines.
let socket = (cpuid.ebx & 0xF0000000u32) >> 0x1C;
let bytes: Vec<u8> = cpuid.eax.to_le_bytes().to_vec();
let base_model = (bytes[0] & 0xF0) >> 4;
let base_family = bytes[1] & 0x0F;
let ext_model = bytes[2] & 0x0F;
let ext_family = {
let low = (bytes[2] & 0xF0) >> 4;
let high = (bytes[3] & 0x0F) << 4;
low | high
};
let model = (ext_model << 4) | base_model;
let family = base_family + ext_family;
match family {
0x19 => match model {
0x0..=0xF => Ok(Self::Milan),
0x10..=0x1F => Ok(Self::Genoa),
0xA0..=0xAF => match socket {
0x4 => Ok(Self::Bergamo),
0x8 => Ok(Self::Siena),
_ => Err(anyhow!("processor is not of a known SEV-SNP generation")),
},
_ => Err(anyhow!("processor is not of a known SEV-SNP model")),
},
0x1A => match model {
0x0..=0x11 => Ok(Self::Turin),
_ => Err(anyhow!("processor is not of a known SEV-SNP model")),
},
_ => Err(anyhow!("processor is not of a known SEV-SNP family")),
}
}
pub(crate) fn to_kds_url(&self) -> String {
match self {
Self::Genoa | Self::Bergamo | Self::Siena => &Self::Genoa,
_ => self,
}
.to_string()
}
}
impl std::fmt::Display for ProcessorGeneration {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{}",
match self {
Self::Milan => "Milan",
Self::Genoa => "Genoa",
Self::Bergamo => "Bergamo",
Self::Siena => "Siena",
Self::Turin => "Turin",
}
)
}
}
07070100000020000081A400000000000000000000000166DA69EB0000049F000000000000000000000000000000000000001A00000000snphost-0.5.0/src/show.rs// SPDX-License-Identifier: Apache-2.0
use super::*;
use cert::fetch::vcek::vcek_url;
#[derive(Subcommand)]
pub enum Show {
/// Show the current number of guests
Guests,
/// Show the platform identifier
Identifier,
/// Show the current platform and reported TCB version
Tcb,
/// Show the VCEK DER download URL
VcekUrl,
/// Show the platform's firmware version
Version,
}
pub fn cmd(show: Show) -> Result<()> {
let status = snp_platform_status()?;
match show {
Show::Guests => println!("{}", status.guest_count),
Show::Identifier => {
let id = firmware()?
.get_identifier()
.map_err(|e| anyhow::anyhow!(format!("{:?}", e)))
.context("error fetching identifier")?;
println!("{}", id);
}
Show::Tcb => println!(
"Reported TCB: {}\nPlatform TCB: {}",
status.reported_tcb_version, status.platform_tcb_version
),
Show::VcekUrl => {
let url = vcek_url()?;
println!("{}", url);
}
Show::Version => println!("{}", status.version),
}
Ok(())
}
07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!214 blocks
