+#define SASL_AUTH_ANY ~0U
+
+/* Authentication mechanism flags */
+#define SASL_MECH_LOGIN (1 << 0)
+#define SASL_MECH_PLAIN (1 << 1)
+#define SASL_MECH_CRAM_MD5 (1 << 2)
+#define SASL_MECH_DIGEST_MD5 (1 << 3)
+#define SASL_MECH_GSSAPI (1 << 4)
+#define SASL_MECH_EXTERNAL (1 << 5)
+#define SASL_MECH_NTLM (1 << 6)
+#define SASL_MECH_XOAUTH2 (1 << 7)
+
+/* Authentication mechanism strings */
+#define SASL_MECH_STRING_LOGIN "LOGIN"
+#define SASL_MECH_STRING_PLAIN "PLAIN"
+#define SASL_MECH_STRING_CRAM_MD5 "CRAM-MD5"
+#define SASL_MECH_STRING_DIGEST_MD5 "DIGEST-MD5"
+#define SASL_MECH_STRING_GSSAPI "GSSAPI"
+#define SASL_MECH_STRING_EXTERNAL "EXTERNAL"
+#define SASL_MECH_STRING_NTLM "NTLM"
+#define SASL_MECH_STRING_XOAUTH2 "XOAUTH2"
+
+enum {
+ CURLDIGESTALGO_MD5,
+ CURLDIGESTALGO_MD5SESS
+};
+
+/* This is used to test whether the line starts with the given mechanism */
+#define sasl_mech_equal(line, wordlen, mech) \
+ (wordlen == (sizeof(mech) - 1) / sizeof(char) && \
+ !memcmp(line, mech, wordlen))
+
+/* This is used to build a SPN string */
+#if !defined(USE_WINDOWS_SSPI)
+char *Curl_sasl_build_spn(const char *service, const char *instance);
+#else
+TCHAR *Curl_sasl_build_spn(const char *service, const char *instance);
+#endif