feat: updates

examples/generate_keypair.rs

@@ -1,3 +1,5 @@
+use base64::engine::general_purpose::STANDARD;
+use base64::Engine;
 use swift_secure_enclave_tool_rs::{
     generate_ecdsa_keypair, is_secure_enclave_supported, KeyMaterial, KeyPurpose,
 };
@@ -33,10 +35,10 @@ fn print_key_material(prefix: &str, key_material: &KeyMaterial) {
     );
     println!(
         "\nPublic key:\n{}",
-        hex::encode(&key_material.public_key_der)
+        STANDARD.encode(&key_material.public_key_der)
     );
     println!(
         "\nPrivate key representation:\n{}",
-        hex::encode(&key_material.private_key_representation)
+        STANDARD.encode(&key_material.private_key_representation)
     );
 }