ecdsa: forward AssociatedAlgorithmIdentifier impls (#698)

...from the `elliptic-curve` crate, as released in v0.13.3

Author: tarcieri

Cargo.lock

@@ -16,7 +16,7 @@ edition = "2021"
 rust-version = "1.65"
 
 [dependencies]
-elliptic-curve = { version = "0.13.2", default-features = false, features = ["digest", "sec1"] }
+elliptic-curve = { version = "0.13.3", default-features = false, features = ["digest", "sec1"] }
 signature = { version = "2.0, <2.2", default-features = false, features = ["rand_core"] }
 
 # optional dependencies

ecdsa/Cargo.toml

@@ -36,6 +36,7 @@ use crate::elliptic_curve::{
         self,
         der::AnyRef,
         spki::{AlgorithmIdentifier, AssociatedAlgorithmIdentifier, SignatureAlgorithmIdentifier},
+        ObjectIdentifier,
     },
     sec1::{self, FromEncodedPoint, ToEncodedPoint},
     AffinePoint,
@@ -523,6 +524,19 @@ where
     type VerifyingKey = VerifyingKey<C>;
 }
 
+#[cfg(feature = "pkcs8")]
+impl<C> AssociatedAlgorithmIdentifier for SigningKey<C>
+where
+    C: AssociatedOid + CurveArithmetic + PrimeCurve,
+    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + SignPrimitive<C>,
+    SignatureSize<C>: ArrayLength<u8>,
+{
+    type Params = ObjectIdentifier;
+
+    const ALGORITHM_IDENTIFIER: AlgorithmIdentifier<ObjectIdentifier> =
+        SecretKey::<C>::ALGORITHM_IDENTIFIER;
+}
+
 #[cfg(feature = "pkcs8")]
 impl<C> SignatureAlgorithmIdentifier for SigningKey<C>
 where

ecdsa/src/signing.rs

@@ -34,7 +34,7 @@ use elliptic_curve::pkcs8::{
     self,
     der::AnyRef,
     spki::{AlgorithmIdentifier, AssociatedAlgorithmIdentifier, SignatureAlgorithmIdentifier},
-    AssociatedOid,
+    AssociatedOid, ObjectIdentifier,
 };
 
 #[cfg(feature = "sha2")]
@@ -384,6 +384,19 @@ where
     }
 }
 
+#[cfg(feature = "pkcs8")]
+impl<C> AssociatedAlgorithmIdentifier for VerifyingKey<C>
+where
+    C: AssociatedOid + CurveArithmetic + PrimeCurve,
+    AffinePoint<C>: FromEncodedPoint<C> + ToEncodedPoint<C>,
+    FieldBytesSize<C>: sec1::ModulusSize,
+{
+    type Params = ObjectIdentifier;
+
+    const ALGORITHM_IDENTIFIER: AlgorithmIdentifier<ObjectIdentifier> =
+        PublicKey::<C>::ALGORITHM_IDENTIFIER;
+}
+
 #[cfg(feature = "pkcs8")]
 impl<C> SignatureAlgorithmIdentifier for VerifyingKey<C>
 where