fix ca certificate verification to ignore trailing whitespaces (#40)

Author: anekkanti

app/ca.go

@@ -42,7 +42,7 @@ func parsePEM(bundle []byte) (certBlocks [][]byte, pemBlocks []byte, err error)
 	}
 	// If p is greater than 0, then this means that there was a portion of the certificate that
 	// is/was malformed.
-	if len(p) > 0 {
+	if len(p) > 0 && strings.TrimSpace(string(p)) != "" {
 		return nil, nil, fmt.Errorf("failed to parse one or more certificates, remainingBytesLen=%d", len(p))
 	}
 	return certBlocks, pemBlocks, nil

app/ca_test.go

@@ -156,6 +156,10 @@ func TestCABundleParser(t *testing.T) {
 	out, err = parseCertificates(encodedBundle)
 	assert.Error(t, err)
 
+	// ignore trailing whitespaces
+	encodedBundle = base64.StdEncoding.EncodeToString([]byte(cert1 + "\n" + cert2 + "\n "))
+	out, err = parseCertificates(encodedBundle)
+	assert.NoError(t, err)
 }
 
 func TestCAAddAndRemove(t *testing.T) {