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Annotation of src/usr.bin/ssh/auth-skey.c, Revision 1.9.2.2

1.8       deraadt     1: /*
1.9.2.2 ! miod        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:  */
1.1       markus     24: #include "includes.h"
1.9.2.2 ! miod       25: RCSID("$OpenBSD: auth-skey.c,v 1.12 2001/05/18 14:13:28 markus Exp $");
1.1       markus     26:
1.9.2.2 ! miod       27: #ifdef SKEY
        !            28:
        !            29: #include <skey.h>
1.4       markus     30:
1.9.2.2 ! miod       31: #include "xmalloc.h"
        !            32: #include "auth.h"
        !            33:
        !            34: static void *
        !            35: skey_init_ctx(Authctxt *authctxt)
1.4       markus     36: {
1.9.2.2 ! miod       37:        return authctxt;
1.4       markus     38: }
                     39:
1.9.2.2 ! miod       40: #define PROMPT "\nS/Key Password: "
1.1       markus     41:
1.9.2.2 ! miod       42: static int
        !            43: skey_query(void *ctx, char **name, char **infotxt,
        !            44:     u_int* numprompts, char ***prompts, u_int **echo_on)
1.1       markus     45: {
1.9.2.2 ! miod       46:        Authctxt *authctxt = ctx;
        !            47:        char challenge[1024], *p;
        !            48:        int len;
        !            49:        struct skey skey;
        !            50:
        !            51:        if (skeychallenge(&skey, authctxt->user, challenge) == -1)
        !            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);
        !            63:        p[0] = '\0';
        !            64:        strlcat(p, challenge, len);
        !            65:        strlcat(p, PROMPT, len);
        !            66:        (*prompts)[0] = p;
1.6       markus     67:
1.9.2.2 ! miod       68:        return 0;
        !            69: }
1.1       markus     70:
1.9.2.2 ! miod       71: static int
        !            72: skey_respond(void *ctx, u_int numresponses, char **responses)
        !            73: {
        !            74:        Authctxt *authctxt = ctx;
        !            75:
        !            76:        if (authctxt->valid &&
        !            77:            numresponses == 1 &&
        !            78:            skey_haskey(authctxt->pw->pw_name) == 0 &&
        !            79:            skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
        !            80:            return 0;
        !            81:        return -1;
1.1       markus     82: }
1.3       markus     83:
1.9.2.2 ! miod       84: static void
        !            85: skey_free_ctx(void *ctx)
1.1       markus     86: {
1.9.2.2 ! miod       87:        /* we don't have a special context */
1.1       markus     88: }
1.9.2.2 ! miod       89:
        !            90: KbdintDevice skey_device = {
        !            91:        "skey",
        !            92:        skey_init_ctx,
        !            93:        skey_query,
        !            94:        skey_respond,
        !            95:        skey_free_ctx
        !            96: };
        !            97: #endif /* SKEY */