new CoseKey data format

libraries/crypto/src/ecdh.rs

@@ -85,7 +85,7 @@ impl PubKey {
         self.p.to_bytes_uncompressed(bytes);
     }
 
-    /// Creates a new PubKey from their coordinates.
+    /// Creates a new PubKey from its coordinates on the elliptic curve.
     pub fn from_coordinates(x: &[u8; NBYTES], y: &[u8; NBYTES]) -> Option<PubKey> {
         PointP256::new_checked_vartime(Int256::from_bin(x), Int256::from_bin(y))
             .map(|p| PubKey { p })

libraries/crypto/src/ecdsa.rs

@@ -220,7 +220,6 @@ impl Signature {
 }
 
 impl PubKey {
-    pub const ES256_ALGORITHM: i64 = -7;
     #[cfg(feature = "with_ctap1")]
     const UNCOMPRESSED_LENGTH: usize = 1 + 2 * int256::NBYTES;