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Annotation of src/usr.bin/ssh/auth-skey.c, Revision 1.21

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"
                     25:
                     26: #ifdef SKEY
1.8       deraadt    27:
1.12      markus     28: #include <skey.h>
1.1       markus     29:
1.12      markus     30: #include "xmalloc.h"
1.10      markus     31: #include "auth.h"
1.17      provos     32: #include "monitor_wrap.h"
1.4       markus     33:
1.12      markus     34: static void *
                     35: skey_init_ctx(Authctxt *authctxt)
                     36: {
                     37:        return authctxt;
                     38: }
                     39:
1.18      itojun     40: int
1.13      deraadt    41: skey_query(void *ctx, char **name, char **infotxt,
1.12      markus     42:     u_int* numprompts, char ***prompts, u_int **echo_on)
1.10      markus     43: {
1.12      markus     44:        Authctxt *authctxt = ctx;
                     45:        char challenge[1024], *p;
                     46:        int len;
                     47:        struct skey skey;
                     48:
1.10      markus     49:        if (skeychallenge(&skey, authctxt->user, challenge) == -1)
1.12      markus     50:                return -1;
                     51:
1.19      deraadt    52:        *name  = xstrdup("");
                     53:        *infotxt  = xstrdup("");
1.12      markus     54:        *numprompts = 1;
1.20      deraadt    55:        *prompts = xmalloc(*numprompts * sizeof(char *));
1.12      markus     56:        *echo_on = xmalloc(*numprompts * sizeof(u_int));
                     57:        (*echo_on)[0] = 0;
                     58:
1.17      provos     59:        len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
1.12      markus     60:        p = xmalloc(len);
1.16      markus     61:        strlcpy(p, challenge, len);
1.17      provos     62:        strlcat(p, SKEY_PROMPT, len);
1.12      markus     63:        (*prompts)[0] = p;
                     64:
                     65:        return 0;
1.10      markus     66: }
1.12      markus     67:
1.18      itojun     68: int
1.12      markus     69: skey_respond(void *ctx, u_int numresponses, char **responses)
1.4       markus     70: {
1.12      markus     71:        Authctxt *authctxt = ctx;
1.13      deraadt    72:
1.12      markus     73:        if (authctxt->valid &&
1.13      deraadt    74:            numresponses == 1 &&
1.10      markus     75:            skey_haskey(authctxt->pw->pw_name) == 0 &&
1.12      markus     76:            skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
                     77:            return 0;
                     78:        return -1;
1.4       markus     79: }
1.12      markus     80:
                     81: static void
                     82: skey_free_ctx(void *ctx)
1.1       markus     83: {
1.12      markus     84:        /* we don't have a special context */
1.1       markus     85: }
1.12      markus     86:
                     87: KbdintDevice skey_device = {
                     88:        "skey",
                     89:        skey_init_ctx,
                     90:        skey_query,
                     91:        skey_respond,
1.17      provos     92:        skey_free_ctx
                     93: };
                     94:
                     95: KbdintDevice mm_skey_device = {
                     96:        "skey",
                     97:        skey_init_ctx,
                     98:        mm_skey_query,
                     99:        mm_skey_respond,
1.12      markus    100:        skey_free_ctx
                    101: };
                    102: #endif /* SKEY */