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Annotation of src/usr.bin/ssh/auth-skey.c, Revision 1.26

1.26    ! dtucker     1: /* $OpenBSD: auth-skey.c,v 1.25 2006/08/05 08:00:33 dtucker Exp $ */
1.8       deraadt     2: /*
1.12      markus      3:  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
1.8       deraadt     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:  */
1.12      markus     25:
                     26: #ifdef SKEY
1.24      deraadt    27:
                     28: #include <sys/types.h>
1.8       deraadt    29:
1.25      dtucker    30: #include <pwd.h>
                     31: #include <stdio.h>
                     32:
1.12      markus     33: #include <skey.h>
1.1       markus     34:
1.12      markus     35: #include "xmalloc.h"
1.25      dtucker    36: #include "key.h"
                     37: #include "hostfile.h"
1.10      markus     38: #include "auth.h"
1.17      provos     39: #include "monitor_wrap.h"
1.4       markus     40:
1.12      markus     41: static void *
                     42: skey_init_ctx(Authctxt *authctxt)
                     43: {
                     44:        return authctxt;
                     45: }
                     46:
1.18      itojun     47: int
1.13      deraadt    48: skey_query(void *ctx, char **name, char **infotxt,
1.12      markus     49:     u_int* numprompts, char ***prompts, u_int **echo_on)
1.10      markus     50: {
1.12      markus     51:        Authctxt *authctxt = ctx;
1.26    ! dtucker    52:        char challenge[1024];
1.12      markus     53:        struct skey skey;
                     54:
1.10      markus     55:        if (skeychallenge(&skey, authctxt->user, challenge) == -1)
1.12      markus     56:                return -1;
                     57:
1.19      deraadt    58:        *name  = xstrdup("");
                     59:        *infotxt  = xstrdup("");
1.12      markus     60:        *numprompts = 1;
1.22      djm        61:        *prompts = xcalloc(*numprompts, sizeof(char *));
                     62:        *echo_on = xcalloc(*numprompts, sizeof(u_int));
1.12      markus     63:
1.22      djm        64:        xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1.12      markus     65:
                     66:        return 0;
1.10      markus     67: }
1.12      markus     68:
1.18      itojun     69: int
1.12      markus     70: skey_respond(void *ctx, u_int numresponses, char **responses)
1.4       markus     71: {
1.12      markus     72:        Authctxt *authctxt = ctx;
1.13      deraadt    73:
1.12      markus     74:        if (authctxt->valid &&
1.13      deraadt    75:            numresponses == 1 &&
1.10      markus     76:            skey_haskey(authctxt->pw->pw_name) == 0 &&
1.12      markus     77:            skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
                     78:            return 0;
                     79:        return -1;
1.4       markus     80: }
1.12      markus     81:
                     82: static void
                     83: skey_free_ctx(void *ctx)
1.1       markus     84: {
1.12      markus     85:        /* we don't have a special context */
1.1       markus     86: }
1.12      markus     87:
                     88: KbdintDevice skey_device = {
                     89:        "skey",
                     90:        skey_init_ctx,
                     91:        skey_query,
                     92:        skey_respond,
1.17      provos     93:        skey_free_ctx
                     94: };
                     95:
                     96: KbdintDevice mm_skey_device = {
                     97:        "skey",
                     98:        skey_init_ctx,
                     99:        mm_skey_query,
                    100:        mm_skey_respond,
1.12      markus    101:        skey_free_ctx
                    102: };
                    103: #endif /* SKEY */