Annotation of src/usr.bin/ssh/auth-bsdauth.c, Revision 1.12
1.12 ! djm 1: /* $OpenBSD: auth-bsdauth.c,v 1.11 2007/09/21 08:15:29 djm Exp $ */
1.1 markus 2: /*
3: * Copyright (c) 2001 Markus Friedl. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: *
14: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24: */
1.10 deraadt 25:
26: #include <sys/types.h>
1.1 markus 27:
28: #include "xmalloc.h"
1.10 deraadt 29: #include "key.h"
30: #include "hostfile.h"
1.1 markus 31: #include "auth.h"
32: #include "log.h"
1.10 deraadt 33: #include "buffer.h"
34: #ifdef GSSAPI
35: #include "ssh-gss.h"
36: #endif
1.3 provos 37: #include "monitor_wrap.h"
1.1 markus 38:
39: static void *
40: bsdauth_init_ctx(Authctxt *authctxt)
41: {
42: return authctxt;
43: }
44:
1.3 provos 45: int
1.2 deraadt 46: bsdauth_query(void *ctx, char **name, char **infotxt,
1.1 markus 47: u_int *numprompts, char ***prompts, u_int **echo_on)
48: {
1.2 deraadt 49: Authctxt *authctxt = ctx;
50: char *challenge = NULL;
1.12 ! djm 51:
! 52: *infotxt = NULL;
! 53: *numprompts = 0;
! 54: *prompts = NULL;
! 55: *echo_on = NULL;
1.1 markus 56:
1.2 deraadt 57: if (authctxt->as != NULL) {
58: debug2("bsdauth_query: try reuse session");
59: challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE);
60: if (challenge == NULL) {
61: auth_close(authctxt->as);
62: authctxt->as = NULL;
63: }
64: }
65:
66: if (challenge == NULL) {
67: debug2("bsdauth_query: new bsd auth session");
68: debug3("bsdauth_query: style %s",
1.1 markus 69: authctxt->style ? authctxt->style : "<default>");
1.2 deraadt 70: authctxt->as = auth_userchallenge(authctxt->user,
1.4 deraadt 71: authctxt->style, "auth-ssh", &challenge);
1.2 deraadt 72: if (authctxt->as == NULL)
73: challenge = NULL;
74: debug2("bsdauth_query: <%s>", challenge ? challenge : "empty");
75: }
76:
77: if (challenge == NULL)
78: return -1;
79:
1.4 deraadt 80: *name = xstrdup("");
81: *infotxt = xstrdup("");
1.2 deraadt 82: *numprompts = 1;
1.8 djm 83: *prompts = xcalloc(*numprompts, sizeof(char *));
84: *echo_on = xcalloc(*numprompts, sizeof(u_int));
1.2 deraadt 85: (*prompts)[0] = xstrdup(challenge);
1.1 markus 86:
1.2 deraadt 87: return 0;
1.1 markus 88: }
89:
1.3 provos 90: int
1.1 markus 91: bsdauth_respond(void *ctx, u_int numresponses, char **responses)
92: {
1.2 deraadt 93: Authctxt *authctxt = ctx;
94: int authok;
1.6 dtucker 95:
96: if (!authctxt->valid)
97: return -1;
1.1 markus 98:
1.2 deraadt 99: if (authctxt->as == 0)
100: error("bsdauth_respond: no bsd auth session");
101:
102: if (numresponses != 1)
103: return -1;
104:
105: authok = auth_userresponse(authctxt->as, responses[0], 0);
106: authctxt->as = NULL;
107: debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok);
108:
109: return (authok == 0) ? -1 : 0;
1.1 markus 110: }
111:
112: static void
113: bsdauth_free_ctx(void *ctx)
114: {
1.2 deraadt 115: Authctxt *authctxt = ctx;
1.1 markus 116:
1.2 deraadt 117: if (authctxt && authctxt->as) {
118: auth_close(authctxt->as);
119: authctxt->as = NULL;
120: }
1.1 markus 121: }
122:
123: KbdintDevice bsdauth_device = {
124: "bsdauth",
125: bsdauth_init_ctx,
126: bsdauth_query,
127: bsdauth_respond,
1.3 provos 128: bsdauth_free_ctx
129: };
130:
131: KbdintDevice mm_bsdauth_device = {
132: "bsdauth",
133: bsdauth_init_ctx,
134: mm_bsdauth_query,
135: mm_bsdauth_respond,
1.1 markus 136: bsdauth_free_ctx
137: };