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217 lines
6.9 KiB
217 lines
6.9 KiB
/* $OpenBSD: auth.h,v 1.89 2016/08/13 17:47:41 markus Exp $ */ |
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/* |
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* Copyright (c) 2000 Markus Friedl. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#ifndef AUTH_H |
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#define AUTH_H |
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#include <signal.h> |
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#include <openssl/rsa.h> |
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#ifdef HAVE_LOGIN_CAP |
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#include <login_cap.h> |
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#endif |
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#ifdef BSD_AUTH |
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#include <bsd_auth.h> |
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#endif |
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#ifdef KRB5 |
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#include <krb5.h> |
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#endif |
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struct ssh; |
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struct sshkey; |
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typedef struct Authctxt Authctxt; |
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typedef struct Authmethod Authmethod; |
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typedef struct KbdintDevice KbdintDevice; |
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struct Authctxt { |
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sig_atomic_t success; |
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int authenticated; /* authenticated and alarms cancelled */ |
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int postponed; /* authentication needs another step */ |
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int valid; /* user exists and is allowed to login */ |
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int attempt; |
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int failures; |
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int server_caused_failure; |
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int force_pwchange; |
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char *user; /* username sent by the client */ |
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char *service; |
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struct passwd *pw; /* set if 'valid' */ |
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char *style; |
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void *kbdintctxt; |
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char *info; /* Extra info for next auth_log */ |
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#ifdef BSD_AUTH |
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auth_session_t *as; |
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#endif |
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char **auth_methods; /* modified from server config */ |
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u_int num_auth_methods; |
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#ifdef KRB5 |
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krb5_context krb5_ctx; |
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krb5_ccache krb5_fwd_ccache; |
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krb5_principal krb5_user; |
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char *krb5_ticket_file; |
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char *krb5_ccname; |
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#endif |
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Buffer *loginmsg; |
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void *methoddata; |
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struct sshkey **prev_userkeys; |
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u_int nprev_userkeys; |
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}; |
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/* |
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* Every authentication method has to handle authentication requests for |
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* non-existing users, or for users that are not allowed to login. In this |
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* case 'valid' is set to 0, but 'user' points to the username requested by |
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* the client. |
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*/ |
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struct Authmethod { |
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char *name; |
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int (*userauth)(Authctxt *authctxt); |
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int *enabled; |
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}; |
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/* |
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* Keyboard interactive device: |
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* init_ctx returns: non NULL upon success |
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* query returns: 0 - success, otherwise failure |
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* respond returns: 0 - success, 1 - need further interaction, |
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* otherwise - failure |
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*/ |
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struct KbdintDevice |
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{ |
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const char *name; |
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void* (*init_ctx)(Authctxt*); |
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int (*query)(void *ctx, char **name, char **infotxt, |
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u_int *numprompts, char ***prompts, u_int **echo_on); |
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int (*respond)(void *ctx, u_int numresp, char **responses); |
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void (*free_ctx)(void *ctx); |
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}; |
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int |
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auth_rhosts2(struct passwd *, const char *, const char *, const char *); |
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int auth_password(Authctxt *, const char *); |
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int hostbased_key_allowed(struct passwd *, const char *, char *, Key *); |
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int user_key_allowed(struct passwd *, Key *, int); |
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void pubkey_auth_info(Authctxt *, const Key *, const char *, ...) |
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__attribute__((__format__ (printf, 3, 4))); |
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void auth2_record_userkey(Authctxt *, struct sshkey *); |
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int auth2_userkey_already_used(Authctxt *, struct sshkey *); |
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struct stat; |
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int auth_secure_path(const char *, struct stat *, const char *, uid_t, |
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char *, size_t); |
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#ifdef KRB5 |
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int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *); |
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int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt); |
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int auth_krb5_password(Authctxt *authctxt, const char *password); |
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void krb5_cleanup_proc(Authctxt *authctxt); |
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#endif /* KRB5 */ |
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#if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE) |
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#include <shadow.h> |
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int auth_shadow_acctexpired(struct spwd *); |
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int auth_shadow_pwexpired(Authctxt *); |
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#endif |
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#include "auth-pam.h" |
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#include "audit.h" |
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void remove_kbdint_device(const char *); |
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void disable_forwarding(void); |
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void do_authentication2(Authctxt *); |
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void auth_info(Authctxt *authctxt, const char *, ...) |
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__attribute__((__format__ (printf, 2, 3))) |
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__attribute__((__nonnull__ (2))); |
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void auth_log(Authctxt *, int, int, const char *, const char *); |
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void auth_maxtries_exceeded(Authctxt *) __attribute__((noreturn)); |
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void userauth_finish(Authctxt *, int, const char *, const char *); |
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int auth_root_allowed(const char *); |
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void userauth_send_banner(const char *); |
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char *auth2_read_banner(void); |
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int auth2_methods_valid(const char *, int); |
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int auth2_update_methods_lists(Authctxt *, const char *, const char *); |
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int auth2_setup_methods_lists(Authctxt *); |
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int auth2_method_allowed(Authctxt *, const char *, const char *); |
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void privsep_challenge_enable(void); |
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int auth2_challenge(Authctxt *, char *); |
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void auth2_challenge_stop(Authctxt *); |
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int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **); |
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int bsdauth_respond(void *, u_int, char **); |
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int skey_query(void *, char **, char **, u_int *, char ***, u_int **); |
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int skey_respond(void *, u_int, char **); |
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int allowed_user(struct passwd *); |
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struct passwd * getpwnamallow(const char *user); |
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char *expand_authorized_keys(const char *, struct passwd *pw); |
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char *authorized_principals_file(struct passwd *); |
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FILE *auth_openkeyfile(const char *, struct passwd *, int); |
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FILE *auth_openprincipals(const char *, struct passwd *, int); |
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int auth_key_is_revoked(Key *); |
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const char *auth_get_canonical_hostname(struct ssh *, int); |
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HostStatus |
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check_key_in_hostfiles(struct passwd *, Key *, const char *, |
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const char *, const char *); |
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/* hostkey handling */ |
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Key *get_hostkey_by_index(int); |
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Key *get_hostkey_public_by_index(int, struct ssh *); |
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Key *get_hostkey_public_by_type(int, int, struct ssh *); |
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Key *get_hostkey_private_by_type(int, int, struct ssh *); |
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int get_hostkey_index(Key *, int, struct ssh *); |
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int sshd_hostkey_sign(Key *, Key *, u_char **, size_t *, |
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const u_char *, size_t, const char *, u_int); |
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/* debug messages during authentication */ |
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void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2))); |
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void auth_debug_send(void); |
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void auth_debug_reset(void); |
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struct passwd *fakepw(void); |
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int sys_auth_passwd(Authctxt *, const char *); |
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#define SKEY_PROMPT "\nS/Key Password: " |
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#if defined(KRB5) && !defined(HEIMDAL) |
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#include <krb5.h> |
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krb5_error_code ssh_krb5_cc_gen(krb5_context, krb5_ccache *); |
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#endif |
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#endif
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