Annotation of src/usr.bin/ssh/auth.h, Revision 1.42
1.42 ! markus 1: /* $OpenBSD: auth.h,v 1.41 2002/09/26 11:38:43 markus Exp $ */
1.29 stevesk 2:
1.5 deraadt 3: /*
4: * Copyright (c) 2000 Markus Friedl. All rights reserved.
5: *
6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: * 2. Redistributions in binary form must reproduce the above copyright
12: * notice, this list of conditions and the following disclaimer in the
13: * documentation and/or other materials provided with the distribution.
14: *
15: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.7 djm 25: *
1.5 deraadt 26: */
1.29 stevesk 27:
1.1 markus 28: #ifndef AUTH_H
29: #define AUTH_H
30:
1.18 markus 31: #include "key.h"
32: #include "hostfile.h"
1.10 markus 33: #include <openssl/rsa.h>
34:
1.13 markus 35: #ifdef HAVE_LOGIN_CAP
36: #include <login_cap.h>
37: #endif
38: #ifdef BSD_AUTH
39: #include <bsd_auth.h>
40: #endif
1.21 dugsong 41: #ifdef KRB5
42: #include <krb5.h>
43: #endif
1.13 markus 44:
1.6 markus 45: typedef struct Authctxt Authctxt;
1.39 markus 46: typedef struct Authmethod Authmethod;
1.16 markus 47: typedef struct KbdintDevice KbdintDevice;
48:
1.6 markus 49: struct Authctxt {
1.21 dugsong 50: int success;
1.42 ! markus 51: int postponed; /* authentication needs another step */
! 52: int valid; /* user exists and is allowed to login */
1.21 dugsong 53: int attempt;
54: int failures;
1.42 ! markus 55: char *user; /* username sent by the client */
1.21 dugsong 56: char *service;
1.42 ! markus 57: struct passwd *pw; /* set if 'valid' */
1.21 dugsong 58: char *style;
59: void *kbdintctxt;
1.13 markus 60: #ifdef BSD_AUTH
1.21 dugsong 61: auth_session_t *as;
62: #endif
63: #ifdef KRB4
64: char *krb4_ticket_file;
65: #endif
66: #ifdef KRB5
67: krb5_context krb5_ctx;
68: krb5_auth_context krb5_auth_ctx;
69: krb5_ccache krb5_fwd_ccache;
70: krb5_principal krb5_user;
71: char *krb5_ticket_file;
1.13 markus 72: #endif
1.6 markus 73: };
1.42 ! markus 74: /*
! 75: * Every authentication method has to handle authentication requests for
! 76: * non-existing users, or for users that are not allowed to login. In this
! 77: * case 'valid' is set to 0, but 'user' points to the username requested by
! 78: * the client.
! 79: */
1.10 markus 80:
1.39 markus 81: struct Authmethod {
82: char *name;
83: int (*userauth)(Authctxt *authctxt);
84: int *enabled;
85: };
86:
1.10 markus 87: /*
1.16 markus 88: * Keyboard interactive device:
1.25 deraadt 89: * init_ctx returns: non NULL upon success
90: * query returns: 0 - success, otherwise failure
1.16 markus 91: * respond returns: 0 - success, 1 - need further interaction,
92: * otherwise - failure
93: */
94: struct KbdintDevice
95: {
96: const char *name;
1.27 millert 97: void* (*init_ctx)(Authctxt*);
1.28 millert 98: int (*query)(void *ctx, char **name, char **infotxt,
99: u_int *numprompts, char ***prompts, u_int **echo_on);
1.27 millert 100: int (*respond)(void *ctx, u_int numresp, char **responses);
101: void (*free_ctx)(void *ctx);
1.16 markus 102: };
103:
1.35 markus 104: int auth_rhosts(struct passwd *, const char *);
1.15 markus 105: int
1.20 itojun 106: auth_rhosts2(struct passwd *, const char *, const char *, const char *);
1.10 markus 107:
1.31 markus 108: int auth_rhosts_rsa(struct passwd *, char *, Key *);
1.22 markus 109: int auth_password(Authctxt *, const char *);
110: int auth_rsa(struct passwd *, BIGNUM *);
1.30 markus 111: int auth_rsa_challenge_dialog(Key *);
1.35 markus 112: BIGNUM *auth_rsa_generate_challenge(Key *);
113: int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]);
114: int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
115:
116: int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
117: int hostbased_key_allowed(struct passwd *, const char *, char *, Key *);
118: int user_key_allowed(struct passwd *, Key *);
1.10 markus 119:
120: #ifdef KRB4
121: #include <krb.h>
1.41 markus 122: int auth_krb4(Authctxt *, KTEXT, char **, KTEXT);
1.21 dugsong 123: int auth_krb4_password(Authctxt *, const char *);
1.20 itojun 124: void krb4_cleanup_proc(void *);
1.10 markus 125:
126: #ifdef AFS
127: #include <kafs.h>
1.21 dugsong 128: int auth_krb4_tgt(Authctxt *, const char *);
129: int auth_afs_token(Authctxt *, const char *);
1.22 markus 130: #endif /* AFS */
1.10 markus 131:
1.22 markus 132: #endif /* KRB4 */
1.21 dugsong 133:
134: #ifdef KRB5
1.40 itojun 135: int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *);
1.21 dugsong 136: int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
137: int auth_krb5_password(Authctxt *authctxt, const char *password);
138: void krb5_cleanup_proc(void *authctxt);
139: #endif /* KRB5 */
1.6 markus 140:
1.33 provos 141: Authctxt *do_authentication(void);
142: Authctxt *do_authentication2(void);
1.2 markus 143:
1.9 markus 144: Authctxt *authctxt_new(void);
1.20 itojun 145: void auth_log(Authctxt *, int, char *, char *);
146: void userauth_finish(Authctxt *, int, char *);
147: int auth_root_allowed(char *);
1.36 djm 148:
149: char *auth2_read_banner(void);
1.6 markus 150:
1.34 provos 151: void privsep_challenge_enable(void);
152:
1.20 itojun 153: int auth2_challenge(Authctxt *, char *);
1.23 markus 154: void auth2_challenge_stop(Authctxt *);
1.35 markus 155: int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
156: int bsdauth_respond(void *, u_int, char **);
157: int skey_query(void *, char **, char **, u_int *, char ***, u_int **);
158: int skey_respond(void *, u_int, char **);
1.1 markus 159:
1.20 itojun 160: int allowed_user(struct passwd *);
1.32 provos 161: struct passwd * getpwnamallow(const char *user);
1.9 markus 162:
1.20 itojun 163: char *get_challenge(Authctxt *);
164: int verify_response(Authctxt *, const char *);
1.9 markus 165:
1.6 markus 166: struct passwd * auth_get_user(void);
1.17 markus 167:
1.20 itojun 168: char *expand_filename(const char *, struct passwd *);
169: char *authorized_keys_file(struct passwd *);
170: char *authorized_keys_file2(struct passwd *);
1.17 markus 171:
172: int
1.20 itojun 173: secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
1.18 markus 174:
175: HostStatus
1.20 itojun 176: check_key_in_hostfiles(struct passwd *, Key *, const char *,
177: const char *, const char *);
1.35 markus 178:
179: /* hostkey handling */
180: Key *get_hostkey_by_index(int);
181: Key *get_hostkey_by_type(int);
182: int get_hostkey_index(Key *);
183: int ssh1_session_key(BIGNUM *);
1.37 markus 184:
185: /* debug messages during authentication */
186: void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2)));
187: void auth_debug_send(void);
188: void auth_debug_reset(void);
1.3 markus 189:
190: #define AUTH_FAIL_MAX 6
191: #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
192: #define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
193:
1.34 provos 194: #define SKEY_PROMPT "\nS/Key Password: "
1.1 markus 195: #endif
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