block, rest = pem.Decode(rest)
	}

	rootCAs, err := x509.ParseCertificates(blockBytes)
	if err != nil {
		spiffeLog.Errorf("parse certificate from rootPEM got error: %v", err)
		return fmt.Errorf("parse certificate from rootPEM got error: %v", err)
	}

	v.AddMapping(trustDomain, rootCAs)
	return nil
}

// AddMappings merges a trust domain to certs map to the certPools map.