bsd/sys/ucred.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1989, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)ucred.h     8.4 (Berkeley) 1/9/95
  62  */
  63 /*
  64  * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
  65  * support for mandatory and extensible security protections.  This notice
  66  * is included in support of clause 2.2 (b) of the Apple Public License,
  67  * Version 2.0.
  68  */
  69
  70 #ifndef _SYS_UCRED_H_
  71 #define _SYS_UCRED_H_
  72
  73 #include <sys/appleapiopts.h>
  74 #include <sys/cdefs.h>
  75 #include <sys/param.h>
  76 #include <bsm/audit.h>
  77
  78 struct label;
  79
  80 #ifdef __APPLE_API_UNSTABLE
  81 #include <sys/queue.h>
  82
  83 /*
  84  * In-kernel credential structure.
  85  *
  86  * Note that this structure should not be used outside the kernel, nor should
  87  * it or copies of it be exported outside.
  88  */
  89 struct ucred {
  90         TAILQ_ENTRY(ucred)      cr_link; /* never modify this without KAUTH_CRED_HASH_LOCK */
  91         u_long  cr_ref;                 /* reference count */
  92
  93         /*
  94          * The credential hash depends on everything from this point on
  95          * (see kauth_cred_get_hashkey)
  96          */
  97         uid_t   cr_uid;                 /* effective user id */
  98         uid_t   cr_ruid;                /* real user id */
  99         uid_t   cr_svuid;               /* saved user id */
 100         short   cr_ngroups;             /* number of groups in advisory list */
 101         gid_t   cr_groups[NGROUPS];     /* advisory group list */
 102         gid_t   cr_rgid;                /* real group id */
 103         gid_t   cr_svgid;               /* saved group id */
 104         uid_t   cr_gmuid;               /* UID for group membership purposes */
 105         /*
 106          * XXX - cr_au will be replaced with cr_audit below.
 107          * cr_au is here to keep kexts from breaking. It seems to
 108          * be currently used by the ucred hashing as well.
 109          */
 110         struct auditinfo cr_au;         /* XXX This needs to go away. */
 111         struct label    *cr_label;      /* MAC label */
 112
 113         int     cr_flags;               /* flags on credential */
 114         /*
 115          * NOTE: If anything else (besides the flags)
 116          * added after the label, you must change
 117          * kauth_cred_find().
 118          */
 119         struct au_session cr_audit;             /* user auditing data */
 120 };
 121 #ifndef _KAUTH_CRED_T
 122 #define _KAUTH_CRED_T
 123 typedef struct ucred *kauth_cred_t;
 124 #endif  /* !_KAUTH_CRED_T */
 125
 126 /*
 127  * Credential flags that can be set on a credential
 128  */
 129 #define CRF_NOMEMBERD   0x00000001      /* memberd opt out by setgroups() */
 130 #define CRF_MAC_ENFORCE 0x00000002      /* force entry through MAC Framework */
 131                                         /* also forces credential cache miss */
 132
 133 /*
 134  * This is the external representation of struct ucred.
 135  */
 136 struct xucred {
 137         u_int   cr_version;             /* structure layout version */
 138         uid_t   cr_uid;                 /* effective user id */
 139         short   cr_ngroups;             /* number of advisory groups */
 140         gid_t   cr_groups[NGROUPS];     /* advisory group list */
 141 };
 142 #define XUCRED_VERSION  0
 143
 144 #define cr_gid cr_groups[0]
 145 #define NOCRED ((kauth_cred_t )0)       /* no credential available */
 146 #define FSCRED ((kauth_cred_t )-1)      /* filesystem credential */
 147
 148 #define IS_VALID_CRED(_cr)      ((_cr) != NOCRED && (_cr) != FSCRED)
 149
 150 #ifdef KERNEL
 151 #ifdef __APPLE_API_OBSOLETE
 152 __BEGIN_DECLS
 153 int             crcmp(kauth_cred_t cr1, kauth_cred_t cr2);
 154 int             suser(kauth_cred_t cred, u_short *acflag);
 155 int             is_suser(void);
 156 int             is_suser1(void);
 157 int             set_security_token(struct proc * p);
 158 void            cru2x(kauth_cred_t cr, struct xucred *xcr);
 159 __END_DECLS
 160 #endif /* __APPLE_API_OBSOLETE */
 161 #endif /* KERNEL */
 162 #endif /* __APPLE_API_UNSTABLE */
 163
 164 #endif /* !_SYS_UCRED_H_ */