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mdoc auth and iaca certificate validation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| use crate::definitions::device_response::Document; | ||
| use crate::definitions::issuer_signed; | ||
| use crate::definitions::DeviceAuth; | ||
| use crate::definitions::Mso; | ||
| use crate::definitions::{ | ||
| device_signed::DeviceAuthentication, helpers::Tag24, SessionTranscript180135, | ||
| }; | ||
| use crate::presentation::reader::Error; | ||
| use crate::presentation::reader::Error as ReaderError; | ||
| use anyhow::Result; | ||
| use elliptic_curve::generic_array::GenericArray; | ||
| use issuer_signed::IssuerSigned; | ||
| use p256::ecdsa::Signature; | ||
| use p256::ecdsa::VerifyingKey; | ||
| use p256::pkcs8::DecodePublicKey; | ||
| use serde_cbor::Value as CborValue; | ||
| use ssi_jwk::Params; | ||
| use ssi_jwk::JWK as SsiJwk; | ||
| use x509_cert::der::Decode; | ||
|
|
||
| pub fn issuer_authentication(x5chain: CborValue, issuer_signed: IssuerSigned) -> Result<(), Error> { | ||
| let signer_key = get_signer_key(&x5chain)?; | ||
| let issuer_auth = issuer_signed.issuer_auth; | ||
| let verification_result: cose_rs::sign1::VerificationResult = | ||
| issuer_auth.verify::<VerifyingKey, Signature>(&signer_key, None, None); | ||
| if !verification_result.success() { | ||
| Err(ReaderError::ParsingError)? | ||
| } else { | ||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| pub fn device_authentication( | ||
| mso: Tag24<Mso>, | ||
| document: Document, | ||
| session_transcript: SessionTranscript180135, | ||
| ) -> Result<(), Error> { | ||
| let device_key = mso.into_inner().device_key_info.device_key; | ||
| let jwk = SsiJwk::try_from(device_key)?; | ||
| match jwk.params { | ||
| Params::EC(p) => { | ||
| let x_coordinate = p.x_coordinate.clone(); | ||
| let y_coordinate = p.y_coordinate.clone(); | ||
| let (Some(x), Some(y)) = (x_coordinate, y_coordinate) else { | ||
| return Err(ReaderError::MdocAuth( | ||
| "device key jwk is missing coordinates".to_string(), | ||
| )); | ||
| }; | ||
| let encoded_point = p256::EncodedPoint::from_affine_coordinates( | ||
| GenericArray::from_slice(x.0.as_slice()), | ||
| GenericArray::from_slice(y.0.as_slice()), | ||
| false, | ||
| ); | ||
| let verifying_key = VerifyingKey::from_encoded_point(&encoded_point)?; | ||
| let namespaces_bytes = document.device_signed.namespaces; | ||
| let device_auth: DeviceAuth = document.device_signed.device_auth; | ||
|
|
||
| //TODO: fix for attended use case: | ||
| match device_auth { | ||
| DeviceAuth::Signature { device_signature } => { | ||
| let detached_payload = Tag24::new(DeviceAuthentication::new( | ||
| session_transcript, | ||
| document.doc_type, | ||
| namespaces_bytes, | ||
| )) | ||
| .map_err(|_| ReaderError::CborDecodingError)?; | ||
| let external_aad = None; | ||
| let cbor_payload = serde_cbor::to_vec(&detached_payload)?; | ||
| let result = device_signature.verify::<VerifyingKey, Signature>( | ||
| &verifying_key, | ||
| Some(cbor_payload), | ||
| external_aad, | ||
| ); | ||
| if !result.success() { | ||
| Err(ReaderError::ParsingError)? | ||
| } else { | ||
| Ok(()) | ||
| } | ||
| } | ||
| DeviceAuth::Mac { .. } => { | ||
| Err(ReaderError::Unsupported) | ||
| // send not yet supported error | ||
| } | ||
| } | ||
| } | ||
| _ => Err(Error::MdocAuth("Unsupported device_key type".to_string())), | ||
| } | ||
| } | ||
|
|
||
| fn get_signer_key(x5chain: &CborValue) -> Result<VerifyingKey, Error> { | ||
| let signer = match x5chain { | ||
| CborValue::Text(t) => { | ||
| let x509 = x509_cert::Certificate::from_der(t.as_bytes())?; | ||
|
|
||
| x509.tbs_certificate | ||
| .subject_public_key_info | ||
| .subject_public_key | ||
| } | ||
| CborValue::Array(a) => match a.first() { | ||
| Some(CborValue::Text(t)) => { | ||
| let x509 = x509_cert::Certificate::from_der(t.as_bytes())?; | ||
|
|
||
| x509.tbs_certificate | ||
| .subject_public_key_info | ||
| .subject_public_key | ||
| } | ||
| _ => return Err(ReaderError::CborDecodingError)?, | ||
| }, | ||
| CborValue::Bytes(b) => { | ||
| let x509 = x509_cert::Certificate::from_der(b)?; | ||
|
|
||
| x509.tbs_certificate | ||
| .subject_public_key_info | ||
| .subject_public_key | ||
| } | ||
| _ => { | ||
| return Err(ReaderError::MdocAuth(format!( | ||
| "Unexpected type for x5chain header: {:?} ", | ||
| x5chain | ||
| ))) | ||
| } | ||
| }; | ||
| Ok(VerifyingKey::from_public_key_der(signer.raw_bytes())?) | ||
| } |
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