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[gssapi-openssh.git] / openssh / auth.h

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+/*
+ * Copyright (c) 2000 Markus Friedl.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $OpenBSD: auth.h,v 1.22 2001/06/26 17:27:22 markus Exp $
+ */
+#ifndef AUTH_H
+#define AUTH_H
+
+#include "key.h"
+#include "hostfile.h"
+#include <openssl/rsa.h>
+
+#ifdef HAVE_LOGIN_CAP
+#include <login_cap.h>
+#endif
+#ifdef BSD_AUTH
+#include <bsd_auth.h>
+#endif
+#ifdef KRB5
+#include <krb5.h>
+#endif
+
+typedef struct Authctxt Authctxt;
+typedef struct KbdintDevice KbdintDevice;
+
+struct Authctxt {
+       int              success;
+       int              postponed;
+       int              valid;
+       int              attempt;
+       int              failures;
+       char            *user;
+       char            *service;
+       struct passwd   *pw;
+       char            *style;
+       void            *kbdintctxt;
+#ifdef BSD_AUTH
+       auth_session_t  *as;
+#endif
+#ifdef KRB4
+       char            *krb4_ticket_file;
+#endif
+#ifdef KRB5
+       krb5_context     krb5_ctx;
+       krb5_auth_context krb5_auth_ctx;
+       krb5_ccache      krb5_fwd_ccache;
+       krb5_principal   krb5_user;
+       char            *krb5_ticket_file;
+#endif
+};
+
+/*
+ * Keyboard interactive device:
+ * init_ctx    returns: non NULL upon success 
+ * query       returns: 0 - success, otherwise failure 
+ * respond     returns: 0 - success, 1 - need further interaction,
+ *             otherwise - failure
+ */
+struct KbdintDevice
+{
+       const char *name;
+       void*   (*init_ctx)     __P((Authctxt*));
+       int     (*query)        __P((void *ctx, char **name, char **infotxt,
+                               u_int *numprompts, char ***prompts,
+                               u_int **echo_on));
+       int     (*respond)      __P((void *ctx, u_int numresp, char **responses));
+       void    (*free_ctx)     __P((void *ctx));
+};
+
+int     auth_rhosts(struct passwd *, const char *);
+int
+auth_rhosts2(struct passwd *, const char *, const char *, const char *);
+
+int     auth_rhosts_rsa(struct passwd *, const char *, RSA *);
+int      auth_password(Authctxt *, const char *);
+int      auth_rsa(struct passwd *, BIGNUM *);
+int      auth_rsa_read_key(char **, u_int *, BIGNUM *, BIGNUM *);
+int      auth_rsa_challenge_dialog(RSA *);
+
+#ifdef KRB4
+#include <krb.h>
+int     auth_krb4(Authctxt *, KTEXT, char **);
+int    auth_krb4_password(Authctxt *, const char *);
+void    krb4_cleanup_proc(void *);
+
+#ifdef AFS
+#include <kafs.h>
+int     auth_krb4_tgt(Authctxt *, const char *);
+int     auth_afs_token(Authctxt *, const char *);
+#endif /* AFS */
+
+#endif /* KRB4 */
+
+#ifdef KRB5
+int    auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client);
+int    auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
+int    auth_krb5_password(Authctxt *authctxt, const char *password);
+void   krb5_cleanup_proc(void *authctxt);
+#endif /* KRB5 */
+
+#include "auth-pam.h"
+#include "auth2-pam.h"
+
+void   do_authentication(void);
+void   do_authentication2(void);
+
+Authctxt *authctxt_new(void);
+void   auth_log(Authctxt *, int, char *, char *);
+void   userauth_finish(Authctxt *, int, char *);
+int    auth_root_allowed(char *);
+
+int    auth2_challenge(Authctxt *, char *);
+
+int    allowed_user(struct passwd *);
+
+char   *get_challenge(Authctxt *);
+int    verify_response(Authctxt *, const char *);
+
+struct passwd * auth_get_user(void);
+
+char   *expand_filename(const char *, struct passwd *);
+char   *authorized_keys_file(struct passwd *);
+char   *authorized_keys_file2(struct passwd *);
+
+int
+secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
+
+HostStatus
+check_key_in_hostfiles(struct passwd *, Key *, const char *,
+    const char *, const char *);
+
+#define AUTH_FAIL_MAX 6
+#define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
+#define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
+
+#endif