Replace hardcoded parameters

common/local_ec_key_source.cc

@@ -0,0 +1,50 @@
+////////////////////////////////////////////////////////////////////////////////
+// Copyright 2019 Google LLC.
+//
+// This software is licensed under the terms defined in the Widevine Master
+// License Agreement. For a copy of this agreement, please contact
+// widevine-licensing@google.com.
+////////////////////////////////////////////////////////////////////////////////
+//
+// Description:
+//   Implementation of local EC key generator.
+
+#include "common/local_ec_key_source.h"
+
+#include <memory>
+#include <string>
+
+#include "glog/logging.h"
+#include "openssl/ec.h"
+#include "openssl/nid.h"
+#include "common/ec_key.h"
+#include "common/ec_util.h"
+
+using widevine::ec_util::SerializeECPrivateKey;
+using widevine::ec_util::SerializeECPublicKey;
+
+namespace widevine {
+
+bool LocalECKeySource::GetECKey(ECPrivateKey::EllipticCurve curve,
+                                std::string* private_key,
+                                std::string* public_key) {
+  DCHECK(private_key);
+  DCHECK(public_key);
+
+  int nid = ec_util::CurveToNid(curve);
+  if (nid <= 0) {
+    return false;
+  }
+  bssl::UniquePtr<EC_KEY> key_pair(EC_KEY_new_by_curve_name(nid));
+  if (key_pair == nullptr || !EC_KEY_generate_key(key_pair.get())) {
+    return false;
+  }
+  if (!SerializeECPrivateKey(key_pair.get(), private_key) ||
+      !SerializeECPublicKey(key_pair.get(), public_key)) {
+    return false;
+  }
+
+  return true;
+}
+
+}  // namespace widevine