/// <summary>
/// 公開鍵と秘密鍵を作成して返す
/// </summary>
/// <param name="publicKey">作成された公開鍵</param>
/// <param name="privateKey">作成された秘密鍵</param>
public static void CreateKeys(out byte[] publicKey, out byte[] privateKey)
{
#if Mono
throw new NotSupportedException();
#else
CngKeyCreationParameters ckcp = new CngKeyCreationParameters();
ckcp.ExportPolicy = CngExportPolicies.AllowPlaintextExport;
ckcp.KeyUsage = CngKeyUsages.KeyAgreement;
using (CngKey ck = CngKey.Create(CngAlgorithm.ECDiffieHellmanP521, null, ckcp))
using (ECDiffieHellmanCng ecdh = new ECDiffieHellmanCng(ck))
{
publicKey = Encoding.ASCII.GetBytes(ecdh.ToXmlString(ECKeyXmlFormat.Rfc4050));
privateKey = ecdh.Key.Export(CngKeyBlobFormat.Pkcs8PrivateBlob);
}
#endif
}
