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Annotation of src/usr.bin/ssh/auth-skey.c, Revision 1.24

1.24    ! deraadt     1: /* $OpenBSD: auth-skey.c,v 1.23 2006/03/25 13:17:01 djm 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:
1.12      markus     30: #include <skey.h>
1.1       markus     31:
1.12      markus     32: #include "xmalloc.h"
1.10      markus     33: #include "auth.h"
1.17      provos     34: #include "monitor_wrap.h"
1.4       markus     35:
1.12      markus     36: static void *
                     37: skey_init_ctx(Authctxt *authctxt)
                     38: {
                     39:        return authctxt;
                     40: }
                     41:
1.18      itojun     42: int
1.13      deraadt    43: skey_query(void *ctx, char **name, char **infotxt,
1.12      markus     44:     u_int* numprompts, char ***prompts, u_int **echo_on)
1.10      markus     45: {
1.12      markus     46:        Authctxt *authctxt = ctx;
                     47:        char challenge[1024], *p;
                     48:        int len;
                     49:        struct skey skey;
                     50:
1.10      markus     51:        if (skeychallenge(&skey, authctxt->user, challenge) == -1)
1.12      markus     52:                return -1;
                     53:
1.19      deraadt    54:        *name  = xstrdup("");
                     55:        *infotxt  = xstrdup("");
1.12      markus     56:        *numprompts = 1;
1.22      djm        57:        *prompts = xcalloc(*numprompts, sizeof(char *));
                     58:        *echo_on = xcalloc(*numprompts, sizeof(u_int));
1.12      markus     59:
1.22      djm        60:        xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1.12      markus     61:
                     62:        return 0;
1.10      markus     63: }
1.12      markus     64:
1.18      itojun     65: int
1.12      markus     66: skey_respond(void *ctx, u_int numresponses, char **responses)
1.4       markus     67: {
1.12      markus     68:        Authctxt *authctxt = ctx;
1.13      deraadt    69:
1.12      markus     70:        if (authctxt->valid &&
1.13      deraadt    71:            numresponses == 1 &&
1.10      markus     72:            skey_haskey(authctxt->pw->pw_name) == 0 &&
1.12      markus     73:            skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
                     74:            return 0;
                     75:        return -1;
1.4       markus     76: }
1.12      markus     77:
                     78: static void
                     79: skey_free_ctx(void *ctx)
1.1       markus     80: {
1.12      markus     81:        /* we don't have a special context */
1.1       markus     82: }
1.12      markus     83:
                     84: KbdintDevice skey_device = {
                     85:        "skey",
                     86:        skey_init_ctx,
                     87:        skey_query,
                     88:        skey_respond,
1.17      provos     89:        skey_free_ctx
                     90: };
                     91:
                     92: KbdintDevice mm_skey_device = {
                     93:        "skey",
                     94:        skey_init_ctx,
                     95:        mm_skey_query,
                     96:        mm_skey_respond,
1.12      markus     97:        skey_free_ctx
                     98: };
                     99: #endif /* SKEY */