Some pr comments applied.

Author: iguanajazz

src/main/java/com/onelogin/AccountSettings.java

@@ -10,7 +10,7 @@
 
 public class AccountSettings {
 	private String certificate;
-	private Certificate cert;
+	private Certificate idp_cert;
 	private String idp_sso_target_url;
 
 	public String getCertificate() {
@@ -30,18 +30,18 @@ public void setIdpSsoTargetUrl(String idp_sso_target_url) {
 	 * Loads certificate from a base64 encoded string
 	 * @param certificate an base64 encoded string.
 	 */
- 	public void loadCertificate() throws CertificateException {
+ 	public void loadCertificate(String certificate) throws CertificateException {
 		CertificateFactory fty = CertificateFactory.getInstance("X.509");
 		ByteArrayInputStream bais = new ByteArrayInputStream(Base64.decodeBase64(certificate.getBytes()));
-		cert = fty.generateCertificate(bais);
+		this.idp_cert = fty.generateCertificate(bais);
 	}
 
 
-	public Certificate getCert() throws CertificateException {
-		if(cert == null){
-			loadCertificate();
+	public Certificate getIdpCert() throws CertificateException {
+		if(this.idp_cert == null){
+			loadCertificate(this.certificate);
 		}
-		return cert;
+		return this.idp_cert;
 	}
 
 	/**
@@ -52,7 +52,7 @@ public Certificate getCert() throws CertificateException {
 	public Certificate getCert(byte[] certificate) throws CertificateException {
 		CertificateFactory fty = CertificateFactory.getInstance("X.509");
 		ByteArrayInputStream bais = new ByteArrayInputStream(Base64.decodeBase64(certificate));
-		cert = fty.generateCertificate(bais);
-		return cert;
+		idp_cert = fty.generateCertificate(bais);
+		return idp_cert;
 	}
 }

src/main/java/com/onelogin/saml/Response.java

@@ -49,7 +49,7 @@ public Response(AccountSettings accountSettings) throws CertificateException {
 	}
 
 	public Response(AccountSettings accountSettings, String response) throws Exception {
-		this(accountSettings);		
+		this(accountSettings);
 		loadXmlFromBase64(response);
 	}
 
@@ -59,7 +59,7 @@ public void loadXmlFromBase64(String responseStr) throws Exception {
 		this.response = new String(decodedB);
 		this.document = Utils.loadXML(this.response);
 		if(this.document == null){
-
+			throw new Exception("SAML Response could not be processed");
 		}
 	}
 
@@ -200,7 +200,7 @@ public boolean isValid(String... requestId){
 			if(signedElements.isEmpty()){
 				throw new Exception("No Signature found. SAML Response rejected");
 			}else{
-				Certificate cert = this.accountSettings.getCert();
+				Certificate cert = this.accountSettings.getIdpCert();
 
 				// Only validates the first signed element
 				if (!Utils.validateSign(signNodes.item(0), cert)) {