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Annotation of src/usr.bin/ssh/auth2-passwd.c, Revision 1.16

1.16    ! markus      1: /* $OpenBSD: auth2-passwd.c,v 1.15 2018/03/03 03:15:51 djm Exp $ */
1.1       markus      2: /*
                      3:  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  *
                     14:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     15:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     16:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     17:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     18:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     19:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     20:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     21:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     22:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     23:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     24:  */
                     25:
1.9       deraadt    26: #include <sys/types.h>
1.8       stevesk    27:
                     28: #include <string.h>
1.9       deraadt    29: #include <stdarg.h>
1.1       markus     30:
                     31: #include "packet.h"
1.13      markus     32: #include "ssherr.h"
1.1       markus     33: #include "log.h"
1.13      markus     34: #include "sshkey.h"
1.9       deraadt    35: #include "hostfile.h"
1.1       markus     36: #include "auth.h"
1.9       deraadt    37: #ifdef GSSAPI
                     38: #include "ssh-gss.h"
                     39: #endif
1.1       markus     40: #include "monitor_wrap.h"
1.12      millert    41: #include "misc.h"
1.2       markus     42: #include "servconf.h"
1.1       markus     43:
1.2       markus     44: /* import */
                     45: extern ServerOptions options;
                     46:
                     47: static int
1.14      markus     48: userauth_passwd(struct ssh *ssh)
1.1       markus     49: {
1.13      markus     50:        char *password;
                     51:        int authenticated = 0, r;
                     52:        u_char change;
                     53:        size_t len;
                     54:
                     55:        if ((r = sshpkt_get_u8(ssh, &change)) != 0 ||
                     56:            (r = sshpkt_get_cstring(ssh, &password, &len)) != 0 ||
                     57:            (change && (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0) ||
                     58:            (r = sshpkt_get_end(ssh)) != 0)
                     59:                fatal("%s: %s", __func__, ssh_err(r));
1.5       dtucker    60:
1.1       markus     61:        if (change)
1.3       itojun     62:                logit("password change not supported");
1.15      djm        63:        else if (PRIVSEP(auth_password(ssh, password)) == 1)
1.1       markus     64:                authenticated = 1;
1.11      djm        65:        explicit_bzero(password, len);
1.10      djm        66:        free(password);
1.1       markus     67:        return authenticated;
                     68: }
1.2       markus     69:
                     70: Authmethod method_passwd = {
                     71:        "password",
                     72:        userauth_passwd,
                     73:        &options.password_authentication
                     74: };