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Annotation of src/usr.bin/ssh/auth-bsdauth.c, Revision 1.1.2.2

1.1       markus      1: /*
                      2:  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
                      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:  */
                     24: #include "includes.h"
1.1.2.2 ! brad       25: RCSID("$OpenBSD: auth-bsdauth.c,v 1.2 2001/12/19 07:18:56 deraadt Exp $");
1.1       markus     26:
                     27: #ifdef BSD_AUTH
                     28: #include "xmalloc.h"
                     29: #include "auth.h"
                     30: #include "log.h"
                     31:
                     32: static void *
                     33: bsdauth_init_ctx(Authctxt *authctxt)
                     34: {
                     35:        return authctxt;
                     36: }
                     37:
                     38: static int
1.1.2.2 ! brad       39: bsdauth_query(void *ctx, char **name, char **infotxt,
1.1       markus     40:    u_int *numprompts, char ***prompts, u_int **echo_on)
                     41: {
1.1.2.2 ! brad       42:        Authctxt *authctxt = ctx;
        !            43:        char *challenge = NULL;
1.1       markus     44:
1.1.2.2 ! brad       45:        if (authctxt->as != NULL) {
        !            46:                debug2("bsdauth_query: try reuse session");
        !            47:                challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE);
        !            48:                if (challenge == NULL) {
        !            49:                        auth_close(authctxt->as);
        !            50:                        authctxt->as = NULL;
        !            51:                }
        !            52:        }
        !            53:
        !            54:        if (challenge == NULL) {
        !            55:                debug2("bsdauth_query: new bsd auth session");
        !            56:                debug3("bsdauth_query: style %s",
1.1       markus     57:                    authctxt->style ? authctxt->style : "<default>");
1.1.2.2 ! brad       58:                authctxt->as = auth_userchallenge(authctxt->user,
1.1       markus     59:                     authctxt->style, "auth-ssh", &challenge);
1.1.2.2 ! brad       60:                if (authctxt->as == NULL)
        !            61:                        challenge = NULL;
        !            62:                debug2("bsdauth_query: <%s>", challenge ? challenge : "empty");
        !            63:        }
        !            64:
        !            65:        if (challenge == NULL)
        !            66:                return -1;
        !            67:
        !            68:        *name       = xstrdup("");
        !            69:        *infotxt    = xstrdup("");
        !            70:        *numprompts = 1;
        !            71:        *prompts = xmalloc(*numprompts * sizeof(char*));
        !            72:        *echo_on = xmalloc(*numprompts * sizeof(u_int));
        !            73:        (*echo_on)[0] = 0;
        !            74:        (*prompts)[0] = xstrdup(challenge);
1.1       markus     75:
1.1.2.2 ! brad       76:        return 0;
1.1       markus     77: }
                     78:
                     79: static int
                     80: bsdauth_respond(void *ctx, u_int numresponses, char **responses)
                     81: {
1.1.2.2 ! brad       82:        Authctxt *authctxt = ctx;
        !            83:        int authok;
1.1       markus     84:
1.1.2.2 ! brad       85:        if (authctxt->as == 0)
        !            86:                error("bsdauth_respond: no bsd auth session");
        !            87:
        !            88:        if (numresponses != 1)
        !            89:                return -1;
        !            90:
        !            91:        authok = auth_userresponse(authctxt->as, responses[0], 0);
        !            92:        authctxt->as = NULL;
        !            93:        debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok);
        !            94:
        !            95:        return (authok == 0) ? -1 : 0;
1.1       markus     96: }
                     97:
                     98: static void
                     99: bsdauth_free_ctx(void *ctx)
                    100: {
1.1.2.2 ! brad      101:        Authctxt *authctxt = ctx;
1.1       markus    102:
1.1.2.2 ! brad      103:        if (authctxt && authctxt->as) {
        !           104:                auth_close(authctxt->as);
        !           105:                authctxt->as = NULL;
        !           106:        }
1.1       markus    107: }
                    108:
                    109: KbdintDevice bsdauth_device = {
                    110:        "bsdauth",
                    111:        bsdauth_init_ctx,
                    112:        bsdauth_query,
                    113:        bsdauth_respond,
                    114:        bsdauth_free_ctx
                    115: };
                    116: #endif