+#define MS_CHAP_RESPONSE_LEN 49 /* Response length for MS-CHAP */
+#define MS_CHAP2_RESPONSE_LEN 49 /* Response length for MS-CHAPv2 */
+
+/*
+ * E=eeeeeeeeee error codes for MS-CHAP failure messages.
+ * Offset by 646 (the minimum code) for switch() handling on older compilers.
+ */
+#define MS_CHAP_ERROR_BASE 646
+#define MS_CHAP_ERROR_RESTRICTED_LOGON_HOURS (646 - MS_CHAP_ERROR_BASE)
+#define MS_CHAP_ERROR_ACCT_DISABLED (647 - MS_CHAP_ERROR_BASE)
+#define MS_CHAP_ERROR_PASSWD_EXPIRED (648 - MS_CHAP_ERROR_BASE)
+#define MS_CHAP_ERROR_NO_DIALIN_PERMISSION (649 - MS_CHAP_ERROR_BASE)
+#define MS_CHAP_ERROR_AUTHENTICATION_FAILURE (691 - MS_CHAP_ERROR_BASE)
+#define MS_CHAP_ERROR_CHANGING_PASSWORD (709 - MS_CHAP_ERROR_BASE)
+
+/*
+ * Use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
+ * in case this struct gets padded.
+ */
+typedef struct {
+ u_char LANManResp[24];
+ u_char NTResp[24];
+ u_char UseNT[1]; /* If 1, ignore the LANMan response field */
+} MS_ChapResponse;
+
+/*
+ * Use MS_CHAP2_RESPONSE_LEN, rather than sizeof(MS_Chap2Response),
+ * in case this struct gets padded.
+ */
+typedef struct {
+ u_char PeerChallenge[16];
+ u_char Reserved[8]; /* Must be zero */
+ u_char NTResp[24];
+ u_char Flags[1]; /* Must be zero */
+} MS_Chap2Response;
+
+void ChapMS __P((chap_state *, u_char *, char *, int, MS_ChapResponse *));
+void ChapMS2 __P((chap_state *, u_char *, u_char *, char *, char *, int,
+ MS_Chap2Response *, u_char[MS_AUTH_RESPONSE_LENGTH+1]));