Add NID_secp384r1 support on parsing UDS public key

It used to be hard coded to secp256.

Bug: 330791928
Test rkp_factory_extraction_tool64

Change-Id: I759d94a7112bb9fb50906b8e0d45b851f82c898f

diff --git a/security/keymint/support/remote_prov_utils.cpp b/security/keymint/support/remote_prov_utils.cpp
index 5ab1514..a90a45c 100644
--- a/security/keymint/support/remote_prov_utils.cpp
+++ b/security/keymint/support/remote_prov_utils.cpp

@@ -65,9 +65,9 @@
     return privKey;
 }
 
-ErrMsgOr<bytevec> ecKeyGetPublicKey(const EC_KEY* ecKey) {
+ErrMsgOr<bytevec> ecKeyGetPublicKey(const EC_KEY* ecKey, const int nid) {
     // Extract public key.
-    auto group = EC_GROUP_Ptr(EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1));
+    auto group = EC_GROUP_Ptr(EC_GROUP_new_by_curve_name(nid));
     if (group.get() == nullptr) {
         return "Error creating EC group by curve name";
     }
@@ -123,11 +123,12 @@
     int keyType = EVP_PKEY_base_id(pubKey.get());
     switch (keyType) {
         case EVP_PKEY_EC: {
+            int nid = EVP_PKEY_bits(pubKey.get()) == 384 ? NID_secp384r1 : NID_X9_62_prime256v1;
             auto ecKey = EC_KEY_Ptr(EVP_PKEY_get1_EC_KEY(pubKey.get()));
             if (ecKey.get() == nullptr) {
                 return "Failed to get ec key";
-            }
-            return ecKeyGetPublicKey(ecKey.get());
+          }
+          return ecKeyGetPublicKey(ecKey.get(), nid);
         }
         case EVP_PKEY_ED25519: {
             bytevec rawPubKey;
@@ -165,7 +166,7 @@
     auto privKey = ecKeyGetPrivateKey(ec_key.get());
     if (!privKey) return privKey.moveMessage();
 
-    auto pubKey = ecKeyGetPublicKey(ec_key.get());
+    auto pubKey = ecKeyGetPublicKey(ec_key.get(), NID_X9_62_prime256v1);
     if (!pubKey) return pubKey.moveMessage();
 
     return std::make_tuple(pubKey.moveValue(), privKey.moveValue());