+/*
+ * According to the setauthdb man page, AIX password registries must be 15
+ * chars or less plus terminating NUL.
+ */
+#ifdef HAVE_SETAUTHDB
+# define REGISTRY_SIZE 16
+#endif
+
+void aix_usrinfo(struct passwd *);
+
+#ifdef WITH_AIXAUTHENTICATE
+# define CUSTOM_SYS_AUTH_PASSWD 1
+# define CUSTOM_SYS_AUTH_ALLOWED_USER 1
+int sys_auth_allowed_user(struct passwd *, Buffer *);
+# define CUSTOM_SYS_AUTH_RECORD_LOGIN 1
+int sys_auth_record_login(const char *, const char *, const char *, Buffer *);
+# define CUSTOM_FAILED_LOGIN 1
+#endif
+
+void aix_setauthdb(const char *);
+void aix_restoreauthdb(void);
+void aix_remove_embedded_newlines(char *);
+
+#if defined(AIX_GETNAMEINFO_HACK) && !defined(BROKEN_GETADDRINFO)
+# ifdef getnameinfo
+# undef getnameinfo
+# endif
+int sshaix_getnameinfo(const struct sockaddr *, size_t, char *, size_t,
+ char *, size_t, int);
+# define getnameinfo(a,b,c,d,e,f,g) (sshaix_getnameinfo(a,b,c,d,e,f,g))
+#endif
+
+/*
+ * We use getgrset in preference to multiple getgrent calls for efficiency
+ * plus it supports NIS and LDAP groups.
+ */
+#if !defined(HAVE_GETGROUPLIST) && defined(HAVE_GETGRSET)
+# define HAVE_GETGROUPLIST
+# define USE_GETGRSET
+int getgrouplist(const char *, gid_t, gid_t *, int *);
+#endif
+