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

1.1       markus      1: /*
1.5       deraadt     2:  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
1.1       markus      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:
                     25: #include "includes.h"
1.7     ! markus     26: RCSID("$OpenBSD: auth-chall.c,v 1.6 2001/03/20 18:57:04 markus Exp $");
1.1       markus     27:
                     28: #include "auth.h"
1.6       markus     29: #include "log.h"
1.1       markus     30:
1.6       markus     31: #ifdef BSD_AUTH
                     32: char *
                     33: get_challenge(Authctxt *authctxt, char *devs)
                     34: {
                     35:        char *challenge;
                     36:
                     37:        if (authctxt->as != NULL) {
                     38:                debug2("try reuse session");
                     39:                challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE);
                     40:                if (challenge != NULL) {
                     41:                        debug2("reuse bsd auth session");
                     42:                        return challenge;
                     43:                }
                     44:                auth_close(authctxt->as);
                     45:                authctxt->as = NULL;
                     46:        }
                     47:        debug2("new bsd auth session");
                     48:        if (devs == NULL || strlen(devs) == 0)
                     49:                devs = authctxt->style;
                     50:        debug3("bsd auth: devs %s", devs ? devs : "<default>");
                     51:        authctxt->as = auth_userchallenge(authctxt->user, devs, "auth-ssh",
                     52:            &challenge);
1.7     ! markus     53:        if (authctxt->as == NULL)
        !            54:                return NULL;
1.6       markus     55:        debug2("get_challenge: <%s>", challenge ? challenge : "EMPTY");
                     56:        return challenge;
                     57: }
                     58: int
                     59: verify_response(Authctxt *authctxt, char *response)
                     60: {
                     61:        int authok;
                     62:
                     63:        if (authctxt->as == 0)
                     64:                error("verify_response: no bsd auth session");
                     65:        authok = auth_userresponse(authctxt->as, response, 0);
                     66:        authctxt->as = NULL;
                     67:        debug("verify_response: <%s> = <%d>", response, authok);
                     68:        return authok != 0;
                     69: }
                     70: #else
1.1       markus     71: #ifdef SKEY
1.2       markus     72: #include <skey.h>
                     73:
1.1       markus     74: char *
                     75: get_challenge(Authctxt *authctxt, char *devs)
                     76: {
                     77:        static char challenge[1024];
1.4       stevesk    78:        struct skey skey;
1.1       markus     79:        if (skeychallenge(&skey, authctxt->user, challenge) == -1)
                     80:                return NULL;
                     81:        strlcat(challenge, "\nS/Key Password: ", sizeof challenge);
                     82:        return challenge;
                     83: }
                     84: int
                     85: verify_response(Authctxt *authctxt, char *response)
                     86: {
                     87:        return (authctxt->valid &&
                     88:            skey_haskey(authctxt->pw->pw_name) == 0 &&
                     89:            skey_passcheck(authctxt->pw->pw_name, response) != -1);
                     90: }
                     91: #else
                     92: /* not available */
                     93: char *
                     94: get_challenge(Authctxt *authctxt, char *devs)
                     95: {
                     96:        return NULL;
                     97: }
                     98: int
                     99: verify_response(Authctxt *authctxt, char *response)
                    100: {
                    101:        return 0;
                    102: }
1.6       markus    103: #endif
1.1       markus    104: #endif