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Implement control_reference_template() for attestation key.

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This should enable key import and generation for attestation keys.
This commit is contained in:
Heiko Schaefer 2022-05-20 11:50:46 +02:00
parent edbb94c433
commit 169e338360
No known key found for this signature in database
GPG key ID: 4A849A1904CCBD7D
1 changed files with 17 additions and 2 deletions
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19
openpgp-card/src/keys.rs
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@ -16,7 +16,7 @@ use crate::crypto_data::{
};
use crate::openpgp::OpenPgpTransaction;
use crate::tlv::{length::tlv_encode_length, value::Value, Tlv};
use crate::{apdu, Error, KeyType, Tags};
use crate::{apdu, Error, KeyType, Tag, Tags};
/// Generate asymmetric key pair on the card.
///
@ -526,7 +526,22 @@ fn control_reference_template(key_type: KeyType) -> Result<Tlv, Error> {
KeyType::Decryption => Tags::CrtKeyConfidentiality,
KeyType::Signing => Tags::CrtKeySignature,
KeyType::Authentication => Tags::CrtKeyAuthentication,
_ => return Err(Error::InternalError("Unexpected KeyType".to_string())),
KeyType::Attestation => {
// The attestation key CRT looks like: [B6 03 84 01 81]
//
// This is a "Control Reference Template in extended format with Key-Ref".
// (See "4.4.3.12 Private Key Template")
let tlv = Tlv::new(
Tags::CrtKeySignature,
// Spec page 38: [..] to indicate the private key: "empty or 84 01 xx"
Value::C(vec![Tlv::new(
Tag::from([0x84]),
// Spec page 43: "Key-Ref 0x81 is reserved for the Attestation key of Yubico."
Value::S(vec![0x81]),
)]),
);
return Ok(tlv);
}
};
Ok(Tlv::new(tag, Value::S(vec![])))
}