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//! Obtain an X.509 attestation certificate for a key within the `YubiHSM2`
//!
//! <https://developers.yubico.com/YubiHSM2/Commands/Get_Object_Info.html>
//!
use super::{Command, Response};
use {Adapter, CommandType, ObjectId, Session, SessionError};
/// Obtain an X.509 attestation certificate for a key within the YubiHSM2.
/// This can be used to demonstrate that a given key was generated by
/// and stored within a YubiHSM2 in a non-exportable manner.
///
/// The `key_id` is the subject key for which an attestation certificate
/// is created, and the`attestation_key_id` will be used to sign the
/// attestation certificate.
///
/// If no attestation key is given, the device's default attestation key
/// will be used, and can be verified against Yubico's certificate.
pub fn attest_asymmetric<A: Adapter>(
session: &mut Session<A>,
key_id: ObjectId,
attestation_key_id: Option<ObjectId>,
) -> Result<AttestationCertificate, SessionError> {
session.send_command(AttestAsymmetricCommand {
key_id,
attestation_key_id: attestation_key_id.unwrap_or(0),
})
}
/// Request parameters for `command::attest_asymmetric`
#[derive(Serialize, Deserialize, Debug)]
pub(crate) struct AttestAsymmetricCommand {
/// Key that attestation certificate will be generated for
pub key_id: ObjectId,
/// Key to use to sign attestation certificate
pub attestation_key_id: ObjectId,
}
impl Command for AttestAsymmetricCommand {
type ResponseType = AttestationCertificate;
}
/// DER encoded X.509 attestation certificate
#[derive(Serialize, Deserialize, Debug)]
pub struct AttestationCertificate(pub Vec<u8>);
impl Response for AttestationCertificate {
const COMMAND_TYPE: CommandType = CommandType::AttestAsymmetric;
}
// TODO: use clippy's scoped lints once they work on stable
#[allow(
unknown_lints,
renamed_and_removed_lints,
len_without_is_empty
)]
impl AttestationCertificate {
/// Unwrap inner byte vector
pub fn into_vec(self) -> Vec<u8> {
self.into()
}
/// Get length of the certificate
#[inline]
pub fn len(&self) -> usize {
self.0.len()
}
/// Get slice of the inner byte vector
#[inline]
pub fn as_slice(&self) -> &[u8] {
self.as_ref()
}
}
impl AsRef<[u8]> for AttestationCertificate {
fn as_ref(&self) -> &[u8] {
self.0.as_ref()
}
}
impl Into<Vec<u8>> for AttestationCertificate {
fn into(self) -> Vec<u8> {
self.0
}
}