+/* $OpenBSD: auth.h,v 1.63 2009/08/15 18:56:34 fgsch Exp $ */
+
+/*
+ * 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.
+ *
+ */
+
#ifndef AUTH_H
#define AUTH_H
-void do_authentication(void);
-void do_authentication2(void);
+#include <signal.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 Authmethod Authmethod;
+typedef struct KbdintDevice KbdintDevice;
+
+struct Authctxt {
+ sig_atomic_t success;
+ int authenticated; /* authenticated and alarms cancelled */
+ int postponed; /* authentication needs another step */
+ int valid; /* user exists and is allowed to login */
+ int attempt;
+ int failures;
+ int force_pwchange;
+ char *user; /* username sent by the client */
+ char *service;
+ struct passwd *pw; /* set if 'valid' */
+ char *style;
+ void *kbdintctxt;
+ void *jpake_ctx;
+#ifdef BSD_AUTH
+ auth_session_t *as;
+#endif
+#ifdef KRB5
+ krb5_context krb5_ctx;
+ krb5_ccache krb5_fwd_ccache;
+ krb5_principal krb5_user;
+ char *krb5_ticket_file;
+ char *krb5_ccname;
+#endif
+ Buffer *loginmsg;
+ void *methoddata;
+};
+/*
+ * Every authentication method has to handle authentication requests for
+ * non-existing users, or for users that are not allowed to login. In this
+ * case 'valid' is set to 0, but 'user' points to the username requested by
+ * the client.
+ */
+
+struct Authmethod {
+ char *name;
+ int (*userauth)(Authctxt *authctxt);
+ int *enabled;
+};
+
+/*
+ * 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)(Authctxt*);
+ int (*query)(void *ctx, char **name, char **infotxt,
+ u_int *numprompts, char ***prompts, u_int **echo_on);
+ int (*respond)(void *ctx, u_int numresp, char **responses);
+ void (*free_ctx)(void *ctx);
+};
+
+int auth_rhosts(struct passwd *, const char *);
+int
+auth_rhosts2(struct passwd *, const char *, const char *, const char *);
+
+int auth_rhosts_rsa(Authctxt *, char *, Key *);
+int auth_password(Authctxt *, const char *);
+int auth_rsa(Authctxt *, BIGNUM *);
+int auth_rsa_challenge_dialog(Key *);
+BIGNUM *auth_rsa_generate_challenge(Key *);
+int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]);
+int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
+
+int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
+int hostbased_key_allowed(struct passwd *, const char *, char *, Key *);
+int user_key_allowed(struct passwd *, Key *);
+
+#ifdef KRB5
+int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *);
+int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
+int auth_krb5_password(Authctxt *authctxt, const char *password);
+void krb5_cleanup_proc(Authctxt *authctxt);
+#endif /* KRB5 */
+
+#if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
+#include <shadow.h>
+int auth_shadow_acctexpired(struct spwd *);
+int auth_shadow_pwexpired(Authctxt *);
+#endif
+
+#include "auth-pam.h"
+#include "audit.h"
+void remove_kbdint_device(const char *);
+
+void disable_forwarding(void);
+
+void do_authentication(Authctxt *);
+void do_authentication2(Authctxt *);
+
+void auth_log(Authctxt *, int, char *, char *);
+void userauth_finish(Authctxt *, int, char *);
+void userauth_send_banner(const char *);
+int auth_root_allowed(char *);
+
+char *auth2_read_banner(void);
+
+void privsep_challenge_enable(void);
+
+int auth2_challenge(Authctxt *, char *);
+void auth2_challenge_stop(Authctxt *);
+int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
+int bsdauth_respond(void *, u_int, char **);
+int skey_query(void *, char **, char **, u_int *, char ***, u_int **);
+int skey_respond(void *, u_int, char **);
+
+void auth2_jpake_get_pwdata(Authctxt *, BIGNUM **, char **, char **);
+void auth2_jpake_stop(Authctxt *);
+
+int allowed_user(struct passwd *);
+struct passwd * getpwnamallow(const char *user);
+
+char *get_challenge(Authctxt *);
+int verify_response(Authctxt *, const char *);
+void abandon_challenge_response(Authctxt *);
-struct passwd *
-auth_get_user(void);
+char *authorized_keys_file(struct passwd *);
+char *authorized_keys_file2(struct passwd *);
+FILE *auth_openkeyfile(const char *, struct passwd *, int);
+
+HostStatus
+check_key_in_hostfiles(struct passwd *, Key *, const char *,
+ const char *, const char *);
+
+/* hostkey handling */
+Key *get_hostkey_by_index(int);
+Key *get_hostkey_by_type(int);
+int get_hostkey_index(Key *);
+int ssh1_session_key(BIGNUM *);
+
+/* debug messages during authentication */
+void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2)));
+void auth_debug_send(void);
+void auth_debug_reset(void);
+
+struct passwd *fakepw(void);
+
+int sys_auth_passwd(Authctxt *, const char *);
+
+#define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
+
+#define SKEY_PROMPT "\nS/Key Password: "
+
+#if defined(KRB5) && !defined(HEIMDAL)
+#include <krb5.h>
+krb5_error_code ssh_krb5_cc_gen(krb5_context, krb5_ccache *);
+#endif
#endif
andersk / openssh.git / blobdiff