| 1 | /*- |
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| 2 | * Copyright (c) 2002 Networks Associates Technology, Inc. |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * This software was developed for the FreeBSD Project by ThinkSec AS and |
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| 6 | * NAI Labs, the Security Research Division of Network Associates, Inc. |
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| 7 | * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the |
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| 8 | * DARPA CHATS research program. |
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| 9 | * |
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| 10 | * Redistribution and use in source and binary forms, with or without |
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| 11 | * modification, are permitted provided that the following conditions |
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| 12 | * are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * 3. The name of the author may not be used to endorse or promote |
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| 19 | * products derived from this software without specific prior written |
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| 20 | * permission. |
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| 21 | * |
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 32 | * SUCH DAMAGE. |
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| 33 | * |
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| 34 | * $P4: //depot/projects/openpam/lib/openpam_restore_cred.c#1 $ |
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| 35 | */ |
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| 36 | |
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| 37 | #include <sys/param.h> |
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| 38 | |
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| 39 | #include <pwd.h> |
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| 40 | #include <stdlib.h> |
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| 41 | #include <unistd.h> |
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| 42 | |
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| 43 | #include <security/pam_appl.h> |
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| 44 | |
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| 45 | #include "openpam_impl.h" |
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| 46 | |
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| 47 | /* |
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| 48 | * OpenPAM extension |
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| 49 | * |
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| 50 | * Restore credentials |
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| 51 | */ |
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| 52 | |
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| 53 | int |
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| 54 | openpam_restore_cred(pam_handle_t *pamh) |
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| 55 | { |
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| 56 | struct pam_saved_cred *scred; |
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| 57 | int r; |
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| 58 | |
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| 59 | r = pam_get_data(pamh, PAM_SAVED_CRED, (const void **)&scred); |
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| 60 | if (r != PAM_SUCCESS) |
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| 61 | return (r); |
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| 62 | if (scred == NULL) |
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| 63 | return (PAM_SYSTEM_ERR); |
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| 64 | if (seteuid(scred->euid) == -1 || |
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| 65 | setgroups(scred->ngroups, scred->groups) == -1 || |
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| 66 | setegid(scred->egid) == -1) |
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| 67 | return (PAM_SYSTEM_ERR); |
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| 68 | pam_set_data(pamh, PAM_SAVED_CRED, NULL, NULL); |
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| 69 | return (PAM_SUCCESS); |
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| 70 | } |
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| 71 | |
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| 72 | /* |
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| 73 | * Error codes: |
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| 74 | * |
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| 75 | * =pam_get_data |
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| 76 | * PAM_SYSTEM_ERR |
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| 77 | */ |
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| 78 | |
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| 79 | /** |
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| 80 | * The =openpam_restore_cred function restores the credentials saved by |
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| 81 | * =openpam_borrow_cred. |
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| 82 | * |
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| 83 | * >setegid |
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| 84 | * >seteuid |
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| 85 | * >setgroups |
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| 86 | */ |
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