Github user jburwell commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/1799#discussion_r90312936
  
    --- Diff: 
utils/src/main/java/com/cloud/utils/security/CertificateHelper.java ---
    @@ -40,123 +46,122 @@
     import java.util.ArrayList;
     import java.util.List;
     
    -import com.cloud.utils.exception.CloudRuntimeException;
    -import org.apache.commons.codec.binary.Base64;
    -
    -import com.cloud.utils.Ternary;
    -import org.bouncycastle.openssl.PEMReader;
    -
     public class CertificateHelper {
    -    public static byte[] buildAndSaveKeystore(String alias, String cert, 
String privateKey, String storePassword) throws KeyStoreException, 
CertificateException,
    -        NoSuchAlgorithmException, InvalidKeySpecException, IOException {
    -        KeyStore ks = buildKeystore(alias, cert, privateKey, 
storePassword);
    -
    -        ByteArrayOutputStream os = new ByteArrayOutputStream();
    -        ks.store(os, storePassword != null ? storePassword.toCharArray() : 
null);
    -        os.close();
    -        return os.toByteArray();
    +    public static byte[] buildAndSaveKeystore(final String alias, final 
String cert, final String privateKey, final String storePassword) throws 
KeyStoreException, CertificateException,
    +    NoSuchAlgorithmException, InvalidKeySpecException, IOException {
    --- End diff --
    
    Please consider adding the following `Preconditions.checkArgument` checks:
    
    * `alias` is not blank
    * `cert` is not blank
    * `privateKey` is not blank


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