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Annotation of src/usr.bin/ssh/auth-skey.c, Revision 1.16

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"
1.15      markus     25: RCSID("$OpenBSD: auth-skey.c,v 1.14 2002/01/11 20:14:11 markus 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"
1.4       markus     33:
1.12      markus     34: static void *
                     35: skey_init_ctx(Authctxt *authctxt)
                     36: {
                     37:        return authctxt;
                     38: }
                     39:
                     40: #define PROMPT "\nS/Key Password: "
                     41:
                     42: static 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:
                     54:        *name       = xstrdup("");
                     55:        *infotxt    = xstrdup("");
                     56:        *numprompts = 1;
                     57:        *prompts = xmalloc(*numprompts * sizeof(char*));
                     58:        *echo_on = xmalloc(*numprompts * sizeof(u_int));
                     59:        (*echo_on)[0] = 0;
                     60:
                     61:        len = strlen(challenge) + strlen(PROMPT) + 1;
                     62:        p = xmalloc(len);
1.16    ! markus     63:        strlcpy(p, challenge, len);
        !            64:        strlcat(p, PROMPT, len);
1.12      markus     65:        (*prompts)[0] = p;
                     66:
                     67:        return 0;
1.10      markus     68: }
1.12      markus     69:
                     70: static int
                     71: skey_respond(void *ctx, u_int numresponses, char **responses)
1.4       markus     72: {
1.12      markus     73:        Authctxt *authctxt = ctx;
1.13      deraadt    74:
1.12      markus     75:        if (authctxt->valid &&
1.13      deraadt    76:            numresponses == 1 &&
1.10      markus     77:            skey_haskey(authctxt->pw->pw_name) == 0 &&
1.12      markus     78:            skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
                     79:            return 0;
                     80:        return -1;
1.4       markus     81: }
1.12      markus     82:
                     83: static void
                     84: skey_free_ctx(void *ctx)
1.1       markus     85: {
1.12      markus     86:        /* we don't have a special context */
1.1       markus     87: }
1.12      markus     88:
                     89: KbdintDevice skey_device = {
                     90:        "skey",
                     91:        skey_init_ctx,
                     92:        skey_query,
                     93:        skey_respond,
                     94:        skey_free_ctx
                     95: };
                     96: #endif /* SKEY */