--- /dev/null
+#ifndef _SECURE_DOWNLOAD_INTERNAL_
+#define _SECURE_DOWNLOAD_INTERNAL_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SD_XML_NAME CFSTR("name")
+#define SD_XML_SIZE CFSTR("size")
+#define SD_XML_CREATED CFSTR("created")
+#define SD_XML_URL CFSTR("url")
+#define SD_XML_VERIFICATIONS CFSTR("verifications")
+#define SD_XML_DIGEST CFSTR("digest")
+#define SD_XML_SECTOR_SIZE CFSTR("sector_size")
+#define SD_XML_DIGESTS CFSTR("digests")
+
+CFPropertyListRef _SecureDownloadParseTicketXML(CFDataRef xmlData);
+CFDataRef _SecureDownloadCreateTicketXML(CFPropertyListRef plist);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif