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Annotation of src/usr.bin/ssh/auth-bsdauth.c, Revision 1.7

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"
                     25:
                     26: #ifdef BSD_AUTH
                     27: #include "xmalloc.h"
                     28: #include "auth.h"
                     29: #include "log.h"
1.3       provos     30: #include "monitor_wrap.h"
1.1       markus     31:
                     32: static void *
                     33: bsdauth_init_ctx(Authctxt *authctxt)
                     34: {
                     35:        return authctxt;
                     36: }
                     37:
1.3       provos     38: int
1.2       deraadt    39: bsdauth_query(void *ctx, char **name, char **infotxt,
1.1       markus     40:    u_int *numprompts, char ***prompts, u_int **echo_on)
                     41: {
1.2       deraadt    42:        Authctxt *authctxt = ctx;
                     43:        char *challenge = NULL;
1.1       markus     44:
1.2       deraadt    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>");
1.2       deraadt    58:                authctxt->as = auth_userchallenge(authctxt->user,
1.4       deraadt    59:                    authctxt->style, "auth-ssh", &challenge);
1.2       deraadt    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:
1.4       deraadt    68:        *name = xstrdup("");
                     69:        *infotxt = xstrdup("");
1.2       deraadt    70:        *numprompts = 1;
1.5       deraadt    71:        *prompts = xmalloc(*numprompts * sizeof(char *));
1.2       deraadt    72:        *echo_on = xmalloc(*numprompts * sizeof(u_int));
                     73:        (*echo_on)[0] = 0;
                     74:        (*prompts)[0] = xstrdup(challenge);
1.1       markus     75:
1.2       deraadt    76:        return 0;
1.1       markus     77: }
                     78:
1.3       provos     79: int
1.1       markus     80: bsdauth_respond(void *ctx, u_int numresponses, char **responses)
                     81: {
1.2       deraadt    82:        Authctxt *authctxt = ctx;
                     83:        int authok;
1.6       dtucker    84:
                     85:        if (!authctxt->valid)
                     86:                return -1;
1.1       markus     87:
1.2       deraadt    88:        if (authctxt->as == 0)
                     89:                error("bsdauth_respond: no bsd auth session");
                     90:
                     91:        if (numresponses != 1)
                     92:                return -1;
                     93:
                     94:        authok = auth_userresponse(authctxt->as, responses[0], 0);
                     95:        authctxt->as = NULL;
                     96:        debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok);
                     97:
                     98:        return (authok == 0) ? -1 : 0;
1.1       markus     99: }
                    100:
                    101: static void
                    102: bsdauth_free_ctx(void *ctx)
                    103: {
1.2       deraadt   104:        Authctxt *authctxt = ctx;
1.1       markus    105:
1.2       deraadt   106:        if (authctxt && authctxt->as) {
                    107:                auth_close(authctxt->as);
                    108:                authctxt->as = NULL;
                    109:        }
1.1       markus    110: }
                    111:
                    112: KbdintDevice bsdauth_device = {
                    113:        "bsdauth",
                    114:        bsdauth_init_ctx,
                    115:        bsdauth_query,
                    116:        bsdauth_respond,
1.3       provos    117:        bsdauth_free_ctx
                    118: };
                    119:
                    120: KbdintDevice mm_bsdauth_device = {
                    121:        "bsdauth",
                    122:        bsdauth_init_ctx,
                    123:        mm_bsdauth_query,
                    124:        mm_bsdauth_respond,
1.1       markus    125:        bsdauth_free_ctx
                    126: };
                    127: #endif