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Annotation of src/usr.bin/ssh/auth-skey.c, Revision 1.17.2.4

1.8       deraadt     1: /*
1.12      markus      2:  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
1.8       deraadt     3:  *
                      4:  * Redistribution and use in source and binary forms, with or without
                      5:  * modification, are permitted provided that the following conditions
                      6:  * are met:
                      7:  * 1. Redistributions of source code must retain the above copyright
                      8:  *    notice, this list of conditions and the following disclaimer.
                      9:  * 2. Redistributions in binary form must reproduce the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer in the
                     11:  *    documentation and/or other materials provided with the distribution.
                     12:  *
                     13:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     15:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     16:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     17:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     18:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     19:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     20:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     21:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     22:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     23:  */
1.12      markus     24: #include "includes.h"
1.17.2.4! miod       25: RCSID("$OpenBSD: auth-skey.c,v 1.20 2002/06/30 21:59:45 deraadt Exp $");
1.12      markus     26:
                     27: #ifdef SKEY
1.8       deraadt    28:
1.12      markus     29: #include <skey.h>
1.1       markus     30:
1.12      markus     31: #include "xmalloc.h"
1.10      markus     32: #include "auth.h"
1.17      provos     33: #include "monitor_wrap.h"
1.4       markus     34:
1.12      markus     35: static void *
                     36: skey_init_ctx(Authctxt *authctxt)
                     37: {
                     38:        return authctxt;
                     39: }
                     40:
1.17.2.1  jason      41: int
1.13      deraadt    42: skey_query(void *ctx, char **name, char **infotxt,
1.12      markus     43:     u_int* numprompts, char ***prompts, u_int **echo_on)
1.10      markus     44: {
1.12      markus     45:        Authctxt *authctxt = ctx;
                     46:        char challenge[1024], *p;
                     47:        int len;
                     48:        struct skey skey;
                     49:
1.10      markus     50:        if (skeychallenge(&skey, authctxt->user, challenge) == -1)
1.12      markus     51:                return -1;
                     52:
1.17.2.3  jason      53:        *name  = xstrdup("");
                     54:        *infotxt  = xstrdup("");
1.12      markus     55:        *numprompts = 1;
1.17.2.4! miod       56:        *prompts = xmalloc(*numprompts * sizeof(char *));
1.12      markus     57:        *echo_on = xmalloc(*numprompts * sizeof(u_int));
                     58:        (*echo_on)[0] = 0;
                     59:
1.17      provos     60:        len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
1.12      markus     61:        p = xmalloc(len);
1.16      markus     62:        strlcpy(p, challenge, len);
1.17      provos     63:        strlcat(p, SKEY_PROMPT, len);
1.12      markus     64:        (*prompts)[0] = p;
                     65:
                     66:        return 0;
1.10      markus     67: }
1.12      markus     68:
1.17.2.1  jason      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 */