add ed448 support

Author: stevefan1999-personal

src/alg_id.rs

@@ -307,6 +307,17 @@ pub const RSA_PSS_SHA512: AlgorithmIdentifier =
 pub const ED25519: AlgorithmIdentifier =
     AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ed25519.der"));
 
+/// AlgorithmIdentifier for `ED448`.
+///
+/// This is:
+///
+/// ```text
+/// # ed448
+/// OBJECT_IDENTIFIER { 1.3.101.113 }
+/// ```
+pub const ED448: AlgorithmIdentifier =
+    AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ed448.der"));
+
 /// A DER encoding of the PKIX AlgorithmIdentifier type:
 ///
 /// ```ASN.1

src/data/alg-ed448.der

@@ -0,0 +1 @@
++eq

tests/key_type.rs

@@ -24,13 +24,15 @@ fn test_private_key_from_der() {
     const RSA_2048_KEY_PKCS8: &[u8] = include_bytes!("../tests/keys/rsa2048key.pkcs8.der");
     const RSA_4096_KEY: &[u8] = include_bytes!("../tests/keys/rsa4096key.pkcs8.der");
     const ED25519_KEY: &[u8] = include_bytes!("../tests/keys/edd25519_v2.der");
+    const ED448_KEY: &[u8] = include_bytes!("../tests/keys/ed448.pkcs8.der");
     const PKCS8_KEYS: &[&[u8]] = &[
         NIST_P256_KEY_PKCS8,
         NIST_P384_KEY_PKCS8,
         NIST_P521_KEY_PKCS8,
         RSA_2048_KEY_PKCS8,
         RSA_4096_KEY,
         ED25519_KEY,
+        ED448_KEY,
     ];
 
     for &bytes in PKCS8_KEYS {