1061 lines
24 KiB
C++
1061 lines
24 KiB
C++
/* secacl.cc: Sun compatible ACL functions.
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Copyright 2000, 2001 Cygnus Solutions.
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Written by Corinna Vinschen <corinna@vinschen.de>
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <grp.h>
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#include <pwd.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/acl.h>
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#include <ctype.h>
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#include <wingdi.h>
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#include <winuser.h>
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#include "cygerrno.h"
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#include "perprocess.h"
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#include "fhandler.h"
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#include "path.h"
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#include "dtable.h"
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#include "sync.h"
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#include "sigproc.h"
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#include "pinfo.h"
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#include "cygheap.h"
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#include "security.h"
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static int
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searchace (aclent_t *aclp, int nentries, int type, int id = -1)
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{
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int i;
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for (i = 0; i < nentries; ++i)
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if ((aclp[i].a_type == type && (id < 0 || aclp[i].a_id == id))
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|| !aclp[i].a_type)
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return i;
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return -1;
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}
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static int
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setacl (const char *file, int nentries, aclent_t *aclbufp)
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{
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DWORD sd_size = 4096;
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char sd_buf[4096];
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PSECURITY_DESCRIPTOR psd = (PSECURITY_DESCRIPTOR) sd_buf;
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if (read_sd (file, psd, &sd_size) <= 0)
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{
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debug_printf ("read_sd %E");
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return -1;
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}
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BOOL dummy;
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/* Get owner SID. */
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PSID owner_sid = NULL;
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if (!GetSecurityDescriptorOwner (psd, &owner_sid, &dummy))
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{
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__seterrno ();
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return -1;
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}
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char owner_buf[MAX_SID_LEN];
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if (!CopySid (MAX_SID_LEN, (PSID) owner_buf, owner_sid))
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{
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__seterrno ();
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return -1;
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}
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owner_sid = (PSID) owner_buf;
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/* Get group SID. */
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PSID group_sid = NULL;
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if (!GetSecurityDescriptorGroup (psd, &group_sid, &dummy))
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{
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__seterrno ();
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return -1;
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}
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char group_buf[MAX_SID_LEN];
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if (!CopySid (MAX_SID_LEN, (PSID) group_buf, group_sid))
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{
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__seterrno ();
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return -1;
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}
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group_sid = (PSID) group_buf;
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/* Initialize local security descriptor. */
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SECURITY_DESCRIPTOR sd;
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if (!InitializeSecurityDescriptor (&sd, SECURITY_DESCRIPTOR_REVISION))
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{
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__seterrno ();
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return -1;
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}
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if (!SetSecurityDescriptorOwner(&sd, owner_sid, FALSE))
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{
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__seterrno ();
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return -1;
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}
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if (group_sid
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&& !SetSecurityDescriptorGroup(&sd, group_sid, FALSE))
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{
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__seterrno ();
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return -1;
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}
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/* Fill access control list. */
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char acl_buf[3072];
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PACL acl = (PACL) acl_buf;
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size_t acl_len = sizeof (ACL);
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int ace_off = 0;
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char sidbuf[MAX_SID_LEN];
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PSID sid = (PSID) sidbuf;
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struct passwd *pw;
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struct group *gr;
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int pos;
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if (!InitializeAcl (acl, 3072, ACL_REVISION))
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{
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__seterrno ();
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return -1;
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}
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for (int i = 0; i < nentries; ++i)
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{
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DWORD allow = STANDARD_RIGHTS_READ
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| FILE_READ_ATTRIBUTES | FILE_READ_EA;
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if (aclbufp[i].a_perm & S_IROTH)
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allow |= FILE_GENERIC_READ;
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if (aclbufp[i].a_perm & S_IWOTH)
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allow |= STANDARD_RIGHTS_ALL | FILE_GENERIC_WRITE
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| DELETE | FILE_DELETE_CHILD;
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if (aclbufp[i].a_perm & S_IXOTH)
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allow |= FILE_GENERIC_EXECUTE;
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/* Set inherit property. */
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DWORD inheritance = (aclbufp[i].a_type & ACL_DEFAULT)
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? INHERIT_ONLY : DONT_INHERIT;
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/*
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* If a specific acl contains a corresponding default entry with
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* identical permissions, only one Windows ACE with proper
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* inheritance bits is created.
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*/
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if (!(aclbufp[i].a_type & ACL_DEFAULT)
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&& (pos = searchace (aclbufp, nentries,
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aclbufp[i].a_type | ACL_DEFAULT,
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(aclbufp[i].a_type & (USER|GROUP))
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? aclbufp[i].a_id : -1)) >= 0
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&& pos < nentries
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&& aclbufp[i].a_perm == aclbufp[pos].a_perm)
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{
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inheritance = INHERIT_ALL;
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/* This eliminates the corresponding default entry. */
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aclbufp[pos].a_type = 0;
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}
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switch (aclbufp[i].a_type)
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{
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case USER_OBJ:
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case DEF_USER_OBJ:
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allow |= STANDARD_RIGHTS_ALL & ~DELETE;
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if (!add_access_allowed_ace (acl, ace_off++, allow,
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owner_sid, acl_len, inheritance))
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return -1;
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break;
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case USER:
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case DEF_USER:
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if (!(pw = getpwuid (aclbufp[i].a_id))
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|| !get_pw_sid (sid, pw)
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|| !add_access_allowed_ace (acl, ace_off++, allow,
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sid, acl_len, inheritance))
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return -1;
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break;
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case GROUP_OBJ:
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case DEF_GROUP_OBJ:
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if (!add_access_allowed_ace (acl, ace_off++, allow,
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group_sid, acl_len, inheritance))
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return -1;
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break;
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case GROUP:
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case DEF_GROUP:
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if (!(gr = getgrgid (aclbufp[i].a_id))
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|| !get_gr_sid (sid, gr)
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|| !add_access_allowed_ace (acl, ace_off++, allow,
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sid, acl_len, inheritance))
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return -1;
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break;
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case OTHER_OBJ:
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case DEF_OTHER_OBJ:
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if (!add_access_allowed_ace (acl, ace_off++, allow,
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get_world_sid(), acl_len, inheritance))
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return -1;
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break;
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}
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}
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/* Set AclSize to computed value. */
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acl->AclSize = acl_len;
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debug_printf ("ACL-Size: %d", acl_len);
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/* Create DACL for local security descriptor. */
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if (!SetSecurityDescriptorDacl (&sd, TRUE, acl, FALSE))
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{
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__seterrno ();
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return -1;
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}
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/* Make self relative security descriptor in psd. */
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sd_size = 0;
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MakeSelfRelativeSD (&sd, psd, &sd_size);
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if (sd_size <= 0)
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{
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__seterrno ();
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return -1;
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}
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if (!MakeSelfRelativeSD (&sd, psd, &sd_size))
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{
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__seterrno ();
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return -1;
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}
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debug_printf ("Created SD-Size: %d", sd_size);
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return write_sd (file, psd, sd_size);
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}
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static void
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getace (aclent_t &acl, int type, int id, DWORD win_ace_mask, DWORD win_ace_type)
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{
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acl.a_type = type;
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acl.a_id = id;
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if (win_ace_mask & FILE_READ_DATA)
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if (win_ace_type == ACCESS_ALLOWED_ACE_TYPE)
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acl.a_perm |= (acl.a_perm & S_IRGRP) ? 0 : S_IRUSR;
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else if (win_ace_type == ACCESS_DENIED_ACE_TYPE)
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acl.a_perm &= ~S_IRGRP;
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if (win_ace_mask & FILE_WRITE_DATA)
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if (win_ace_type == ACCESS_ALLOWED_ACE_TYPE)
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acl.a_perm |= (acl.a_perm & S_IWGRP) ? 0 : S_IWUSR;
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else if (win_ace_type == ACCESS_DENIED_ACE_TYPE)
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acl.a_perm &= ~S_IWGRP;
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if (win_ace_mask & FILE_EXECUTE)
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if (win_ace_type == ACCESS_ALLOWED_ACE_TYPE)
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acl.a_perm |= (acl.a_perm & S_IXGRP) ? 0 : S_IXUSR;
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else if (win_ace_type == ACCESS_DENIED_ACE_TYPE)
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acl.a_perm &= ~S_IXGRP;
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}
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static int
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getacl (const char *file, DWORD attr, int nentries, aclent_t *aclbufp)
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{
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DWORD sd_size = 4096;
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char sd_buf[4096];
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PSECURITY_DESCRIPTOR psd = (PSECURITY_DESCRIPTOR) sd_buf;
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int ret;
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if ((ret = read_sd (file, psd, &sd_size)) <= 0)
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{
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debug_printf ("read_sd %E");
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return ret;
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}
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PSID owner_sid;
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PSID group_sid;
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BOOL dummy;
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uid_t uid;
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gid_t gid;
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if (!GetSecurityDescriptorOwner (psd, &owner_sid, &dummy))
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{
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debug_printf ("GetSecurityDescriptorOwner %E");
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__seterrno ();
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return -1;
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}
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uid = get_uid_from_sid (owner_sid);
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if (!GetSecurityDescriptorGroup (psd, &group_sid, &dummy))
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{
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debug_printf ("GetSecurityDescriptorGroup %E");
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__seterrno ();
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return -1;
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}
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gid = get_gid_from_sid (group_sid);
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aclent_t lacl[MAX_ACL_ENTRIES];
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memset (&lacl, 0, MAX_ACL_ENTRIES * sizeof (aclent_t));
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lacl[0].a_type = USER_OBJ;
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lacl[0].a_id = uid;
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lacl[1].a_type = GROUP_OBJ;
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lacl[1].a_id = gid;
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lacl[2].a_type = OTHER_OBJ;
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PACL acl;
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BOOL acl_exists;
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if (!GetSecurityDescriptorDacl (psd, &acl_exists, &acl, &dummy))
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{
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__seterrno ();
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debug_printf ("GetSecurityDescriptorDacl %E");
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return -1;
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}
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int pos, i;
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if (!acl_exists || !acl)
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{
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for (pos = 0; pos < MIN_ACL_ENTRIES; ++pos)
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lacl[pos].a_perm = S_IRWXU | S_IRWXG | S_IRWXO;
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pos = nentries < MIN_ACL_ENTRIES ? nentries : MIN_ACL_ENTRIES;
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memcpy (aclbufp, lacl, pos * sizeof (aclent_t));
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return pos;
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}
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for (i = 0; i < acl->AceCount && (!nentries || i < nentries); ++i)
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{
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ACCESS_ALLOWED_ACE *ace;
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if (!GetAce (acl, i, (PVOID *) &ace))
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continue;
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PSID ace_sid = (PSID) &ace->SidStart;
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int id;
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int type = 0;
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if (EqualSid (ace_sid, owner_sid))
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{
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type = USER_OBJ;
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id = uid;
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}
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else if (EqualSid (ace_sid, group_sid))
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{
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type = GROUP_OBJ;
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id = gid;
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}
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else if (EqualSid (ace_sid, get_world_sid ()))
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{
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type = OTHER_OBJ;
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id = 0;
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}
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else
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{
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id = get_id_from_sid (ace_sid, FALSE, &type);
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if (type != GROUP)
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{
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int type2 = 0;
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int id2 = get_id_from_sid (ace_sid, TRUE, &type2);
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if (type2 == GROUP)
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{
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id = id2;
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type = GROUP;
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}
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}
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}
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if (!type)
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continue;
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if (!(ace->Header.AceFlags & INHERIT_ONLY_ACE))
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{
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if ((pos = searchace (lacl, MAX_ACL_ENTRIES, type, id)) >= 0)
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getace (lacl[pos], type, id, ace->Mask, ace->Header.AceType);
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}
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if ((ace->Header.AceFlags & INHERIT_ALL)
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&& (attr & FILE_ATTRIBUTE_DIRECTORY))
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{
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type |= ACL_DEFAULT;
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if ((pos = searchace (lacl, MAX_ACL_ENTRIES, type, id)) >= 0)
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getace (lacl[pos], type, id, ace->Mask, ace->Header.AceType);
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}
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}
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if ((pos = searchace (lacl, MAX_ACL_ENTRIES, 0)) < 0)
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pos = MAX_ACL_ENTRIES;
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for (i = 0; i < pos; ++i)
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{
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lacl[i].a_perm = (lacl[i].a_perm & S_IRWXU)
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& ~((lacl[i].a_perm & S_IRWXG) << 3);
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lacl[i].a_perm |= (lacl[i].a_perm & S_IRWXU) >> 3
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| (lacl[i].a_perm & S_IRWXU) >> 6;
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}
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if ((searchace (lacl, MAX_ACL_ENTRIES, USER) >= 0
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|| searchace (lacl, MAX_ACL_ENTRIES, GROUP) >= 0)
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&& (pos = searchace (lacl, MAX_ACL_ENTRIES, CLASS_OBJ)) >= 0)
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{
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lacl[pos].a_type = CLASS_OBJ;
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lacl[pos].a_perm =
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lacl[searchace (lacl, MAX_ACL_ENTRIES, GROUP_OBJ)].a_perm;
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}
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int dgpos;
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if ((searchace (lacl, MAX_ACL_ENTRIES, DEF_USER) >= 0
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|| searchace (lacl, MAX_ACL_ENTRIES, DEF_GROUP) >= 0)
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&& (dgpos = searchace (lacl, MAX_ACL_ENTRIES, DEF_GROUP_OBJ)) >= 0
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&& (pos = searchace (lacl, MAX_ACL_ENTRIES, DEF_CLASS_OBJ)) >= 0
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&& (attr & FILE_ATTRIBUTE_DIRECTORY))
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{
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lacl[pos].a_type = DEF_CLASS_OBJ;
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lacl[pos].a_perm = lacl[dgpos].a_perm;
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}
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if ((pos = searchace (lacl, MAX_ACL_ENTRIES, 0)) < 0)
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pos = MAX_ACL_ENTRIES;
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if (pos > nentries)
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pos = nentries;
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if (aclbufp)
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memcpy (aclbufp, lacl, pos * sizeof (aclent_t));
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aclsort (pos, 0, aclbufp);
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syscall_printf ("%d = getacl (%s)", pos, file);
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return pos;
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}
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int
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acl_access (const char *path, int flags)
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{
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aclent_t acls[MAX_ACL_ENTRIES];
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int cnt;
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if ((cnt = acl (path, GETACL, MAX_ACL_ENTRIES, acls)) < 1)
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return -1;
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/* Only check existance. */
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if (!(flags & (R_OK|W_OK|X_OK)))
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return 0;
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for (int i = 0; i < cnt; ++i)
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{
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switch (acls[i].a_type)
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{
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case USER_OBJ:
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case USER:
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if (acls[i].a_id != myself->uid)
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{
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/*
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* Check if user is a NT group:
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* Take SID from passwd, search SID in group, check is_grp_member.
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*/
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char owner_sidbuf[MAX_SID_LEN];
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PSID owner_sid = (PSID) owner_sidbuf;
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char group_sidbuf[MAX_SID_LEN];
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PSID group_sid = (PSID) group_sidbuf;
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struct passwd *pw;
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struct group *gr = NULL;
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if ((pw = getpwuid (acls[i].a_id)) != NULL
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&& get_pw_sid (owner_sid, pw))
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{
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while ((gr = getgrent ()))
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if (get_gr_sid (group_sid, gr)
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&& EqualSid (owner_sid, group_sid)
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&& is_grp_member (myself->uid, gr->gr_gid))
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break;
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endgrent ();
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}
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if (!gr)
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continue;
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}
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break;
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case GROUP_OBJ:
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case GROUP:
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if (acls[i].a_id != myself->gid &&
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!is_grp_member (myself->uid, acls[i].a_id))
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continue;
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break;
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case OTHER_OBJ:
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break;
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default:
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continue;
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}
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if ((!(flags & R_OK) || (acls[i].a_perm & S_IREAD))
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&& (!(flags & W_OK) || (acls[i].a_perm & S_IWRITE))
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&& (!(flags & X_OK) || (acls[i].a_perm & S_IEXEC)))
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return 0;
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}
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set_errno (EACCES);
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return -1;
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}
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static
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int
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acl_worker (const char *path, int cmd, int nentries, aclent_t *aclbufp,
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int nofollow)
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{
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extern suffix_info stat_suffixes[];
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path_conv real_path (path, (nofollow ? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW) | PC_FULL, stat_suffixes);
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if (real_path.error)
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{
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set_errno (real_path.error);
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syscall_printf ("-1 = acl (%s)", path);
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return -1;
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}
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if (!real_path.has_acls ())
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{
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struct stat st;
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int ret = -1;
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switch (cmd)
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{
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case SETACL:
|
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set_errno (ENOSYS);
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break;
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case GETACL:
|
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if (nentries < 1)
|
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set_errno (EINVAL);
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else if ((nofollow && !lstat (path, &st))
|
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|| (!nofollow && !stat (path, &st)))
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{
|
|
aclent_t lacl[4];
|
|
if (nentries > 0)
|
|
{
|
|
lacl[0].a_type = USER_OBJ;
|
|
lacl[0].a_id = st.st_uid;
|
|
lacl[0].a_perm = (st.st_mode & S_IRWXU)
|
|
| (st.st_mode & S_IRWXU) >> 3
|
|
| (st.st_mode & S_IRWXU) >> 6;
|
|
}
|
|
if (nentries > 1)
|
|
{
|
|
lacl[1].a_type = GROUP_OBJ;
|
|
lacl[1].a_id = st.st_gid;
|
|
lacl[1].a_perm = (st.st_mode & S_IRWXG)
|
|
| (st.st_mode & S_IRWXG) << 3
|
|
| (st.st_mode & S_IRWXG) >> 3;
|
|
}
|
|
if (nentries > 2)
|
|
{
|
|
lacl[2].a_type = OTHER_OBJ;
|
|
lacl[2].a_id = 0;
|
|
lacl[2].a_perm = (st.st_mode & S_IRWXO)
|
|
| (st.st_mode & S_IRWXO) << 6
|
|
| (st.st_mode & S_IRWXO) << 3;
|
|
}
|
|
if (nentries > 3)
|
|
{
|
|
lacl[3].a_type = CLASS_OBJ;
|
|
lacl[3].a_id = 0;
|
|
lacl[3].a_perm = (st.st_mode & S_IRWXG)
|
|
| (st.st_mode & S_IRWXG) << 3
|
|
| (st.st_mode & S_IRWXG) >> 3;
|
|
}
|
|
if (nentries > 4)
|
|
nentries = 4;
|
|
if (aclbufp)
|
|
memcpy (aclbufp, lacl, nentries * sizeof (aclent_t));
|
|
ret = nentries;
|
|
}
|
|
break;
|
|
case GETACLCNT:
|
|
ret = 4;
|
|
break;
|
|
}
|
|
syscall_printf ("%d = acl (%s)", ret, path);
|
|
return ret;
|
|
}
|
|
switch (cmd)
|
|
{
|
|
case SETACL:
|
|
if (!aclsort(nentries, 0, aclbufp))
|
|
return setacl (real_path.get_win32 (),
|
|
nentries, aclbufp);
|
|
break;
|
|
case GETACL:
|
|
if (nentries < 1)
|
|
break;
|
|
return getacl (real_path.get_win32 (),
|
|
real_path.file_attributes (),
|
|
nentries, aclbufp);
|
|
case GETACLCNT:
|
|
return getacl (real_path.get_win32 (),
|
|
real_path.file_attributes (),
|
|
0, NULL);
|
|
default:
|
|
break;
|
|
}
|
|
set_errno (EINVAL);
|
|
syscall_printf ("-1 = acl (%s)", path);
|
|
return -1;
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
acl (const char *path, int cmd, int nentries, aclent_t *aclbufp)
|
|
{
|
|
return acl_worker (path, cmd, nentries, aclbufp, 0);
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
lacl (const char *path, int cmd, int nentries, aclent_t *aclbufp)
|
|
{
|
|
return acl_worker (path, cmd, nentries, aclbufp, 1);
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
facl (int fd, int cmd, int nentries, aclent_t *aclbufp)
|
|
{
|
|
if (cygheap->fdtab.not_open (fd))
|
|
{
|
|
syscall_printf ("-1 = facl (%d)", fd);
|
|
set_errno (EBADF);
|
|
return -1;
|
|
}
|
|
const char *path = cygheap->fdtab[fd]->get_name ();
|
|
if (path == NULL)
|
|
{
|
|
syscall_printf ("-1 = facl (%d) (no name)", fd);
|
|
set_errno (ENOSYS);
|
|
return -1;
|
|
}
|
|
syscall_printf ("facl (%d): calling acl (%s)", fd, path);
|
|
return acl_worker (path, cmd, nentries, aclbufp, 0);
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
aclcheck (aclent_t *aclbufp, int nentries, int *which)
|
|
{
|
|
BOOL has_user_obj = FALSE;
|
|
BOOL has_group_obj = FALSE;
|
|
BOOL has_other_obj = FALSE;
|
|
BOOL has_class_obj = FALSE;
|
|
BOOL has_ug_objs = FALSE;
|
|
BOOL has_def_user_obj = FALSE;
|
|
BOOL has_def_group_obj = FALSE;
|
|
BOOL has_def_other_obj = FALSE;
|
|
BOOL has_def_class_obj = FALSE;
|
|
BOOL has_def_ug_objs = FALSE;
|
|
int pos2;
|
|
|
|
for (int pos = 0; pos < nentries; ++pos)
|
|
switch (aclbufp[pos].a_type)
|
|
{
|
|
case USER_OBJ:
|
|
if (has_user_obj)
|
|
{
|
|
if (which)
|
|
*which = pos;
|
|
return USER_ERROR;
|
|
}
|
|
has_user_obj = TRUE;
|
|
break;
|
|
case GROUP_OBJ:
|
|
if (has_group_obj)
|
|
{
|
|
if (which)
|
|
*which = pos;
|
|
return GRP_ERROR;
|
|
}
|
|
has_group_obj = TRUE;
|
|
break;
|
|
case OTHER_OBJ:
|
|
if (has_other_obj)
|
|
{
|
|
if (which)
|
|
*which = pos;
|
|
return OTHER_ERROR;
|
|
}
|
|
has_other_obj = TRUE;
|
|
break;
|
|
case CLASS_OBJ:
|
|
if (has_class_obj)
|
|
{
|
|
if (which)
|
|
*which = pos;
|
|
return CLASS_ERROR;
|
|
}
|
|
has_class_obj = TRUE;
|
|
break;
|
|
case USER:
|
|
case GROUP:
|
|
if ((pos2 = searchace (aclbufp + pos + 1, nentries - pos - 1,
|
|
aclbufp[pos].a_type, aclbufp[pos].a_id)) >= 0)
|
|
{
|
|
if (which)
|
|
*which = pos2;
|
|
return DUPLICATE_ERROR;
|
|
}
|
|
has_ug_objs = TRUE;
|
|
break;
|
|
case DEF_USER_OBJ:
|
|
if (has_def_user_obj)
|
|
{
|
|
if (which)
|
|
*which = pos;
|
|
return USER_ERROR;
|
|
}
|
|
has_def_user_obj = TRUE;
|
|
break;
|
|
case DEF_GROUP_OBJ:
|
|
if (has_def_group_obj)
|
|
{
|
|
if (which)
|
|
*which = pos;
|
|
return GRP_ERROR;
|
|
}
|
|
has_def_group_obj = TRUE;
|
|
break;
|
|
case DEF_OTHER_OBJ:
|
|
if (has_def_other_obj)
|
|
{
|
|
if (which)
|
|
*which = pos;
|
|
return OTHER_ERROR;
|
|
}
|
|
has_def_other_obj = TRUE;
|
|
break;
|
|
case DEF_CLASS_OBJ:
|
|
if (has_def_class_obj)
|
|
{
|
|
if (which)
|
|
*which = pos;
|
|
return CLASS_ERROR;
|
|
}
|
|
has_def_class_obj = TRUE;
|
|
break;
|
|
case DEF_USER:
|
|
case DEF_GROUP:
|
|
if ((pos2 = searchace (aclbufp + pos + 1, nentries - pos - 1,
|
|
aclbufp[pos].a_type, aclbufp[pos].a_id)) >= 0)
|
|
{
|
|
if (which)
|
|
*which = pos2;
|
|
return DUPLICATE_ERROR;
|
|
}
|
|
has_def_ug_objs = TRUE;
|
|
break;
|
|
default:
|
|
return ENTRY_ERROR;
|
|
}
|
|
if (!has_user_obj
|
|
|| !has_group_obj
|
|
|| !has_other_obj
|
|
#if 0
|
|
/* These checks are not ok yet since CLASS_OBJ isn't fully implemented. */
|
|
|| (has_ug_objs && !has_class_obj)
|
|
|| (has_def_ug_objs && !has_def_class_obj)
|
|
#endif
|
|
)
|
|
{
|
|
if (which)
|
|
*which = -1;
|
|
return MISS_ERROR;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
extern "C"
|
|
int acecmp (const void *a1, const void *a2)
|
|
{
|
|
#define ace(i) ((const aclent_t *) a##i)
|
|
int ret = ace(1)->a_type - ace(2)->a_type;
|
|
if (!ret)
|
|
ret = ace(1)->a_id - ace(2)->a_id;
|
|
return ret;
|
|
#undef ace
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
aclsort (int nentries, int, aclent_t *aclbufp)
|
|
{
|
|
if (aclcheck (aclbufp, nentries, NULL))
|
|
return -1;
|
|
if (!aclbufp || nentries < 1)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
qsort((void *) aclbufp, nentries, sizeof (aclent_t), acecmp);
|
|
return 0;
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
acltomode (aclent_t *aclbufp, int nentries, mode_t *modep)
|
|
{
|
|
int pos;
|
|
|
|
if (!aclbufp || nentries < 1 || !modep)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
*modep = 0;
|
|
if ((pos = searchace (aclbufp, nentries, USER_OBJ)) < 0)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
*modep |= aclbufp[pos].a_perm & S_IRWXU;
|
|
if ((pos = searchace (aclbufp, nentries, GROUP_OBJ)) < 0)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
if (searchace (aclbufp, nentries, CLASS_OBJ) < 0)
|
|
pos = searchace (aclbufp, nentries, CLASS_OBJ);
|
|
*modep |= (aclbufp[pos].a_perm & S_IRWXU) >> 3;
|
|
if ((pos = searchace (aclbufp, nentries, OTHER_OBJ)) < 0)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
*modep |= (aclbufp[pos].a_perm & S_IRWXU) >> 6;
|
|
return 0;
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
aclfrommode(aclent_t *aclbufp, int nentries, mode_t *modep)
|
|
{
|
|
int pos;
|
|
|
|
if (!aclbufp || nentries < 1 || !modep)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
if ((pos = searchace (aclbufp, nentries, USER_OBJ)) < 0)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
aclbufp[pos].a_perm = (*modep & S_IRWXU)
|
|
| (*modep & S_IRWXU) >> 3
|
|
| (*modep & S_IRWXU) >> 6;
|
|
if ((pos = searchace (aclbufp, nentries, GROUP_OBJ)) < 0)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
if (searchace (aclbufp, nentries, CLASS_OBJ) < 0)
|
|
pos = searchace (aclbufp, nentries, CLASS_OBJ);
|
|
aclbufp[pos].a_perm = (*modep & S_IRWXG)
|
|
| (*modep & S_IRWXG) << 3
|
|
| (*modep & S_IRWXG) >> 3;
|
|
if ((pos = searchace (aclbufp, nentries, OTHER_OBJ)) < 0)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
aclbufp[pos].a_perm = (*modep & S_IRWXO)
|
|
| (*modep & S_IRWXO) << 6
|
|
| (*modep & S_IRWXO) << 3;
|
|
return 0;
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
acltopbits (aclent_t *aclbufp, int nentries, mode_t *pbitsp)
|
|
{
|
|
return acltomode (aclbufp, nentries, pbitsp);
|
|
}
|
|
|
|
extern "C"
|
|
int
|
|
aclfrompbits (aclent_t *aclbufp, int nentries, mode_t *pbitsp)
|
|
{
|
|
return aclfrommode (aclbufp, nentries, pbitsp);
|
|
}
|
|
|
|
static char *
|
|
permtostr (mode_t perm)
|
|
{
|
|
static char pbuf[4];
|
|
|
|
pbuf[0] = (perm & S_IREAD) ? 'r' : '-';
|
|
pbuf[1] = (perm & S_IWRITE) ? 'w' : '-';
|
|
pbuf[2] = (perm & S_IEXEC) ? 'x' : '-';
|
|
pbuf[3] = '\0';
|
|
return pbuf;
|
|
}
|
|
|
|
extern "C"
|
|
char *
|
|
acltotext (aclent_t *aclbufp, int aclcnt)
|
|
{
|
|
if (!aclbufp || aclcnt < 1 || aclcnt > MAX_ACL_ENTRIES
|
|
|| aclcheck (aclbufp, aclcnt, NULL))
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
char buf[32000];
|
|
buf[0] = '\0';
|
|
BOOL first = TRUE;
|
|
|
|
for (int pos = 0; pos < aclcnt; ++pos)
|
|
{
|
|
if (!first)
|
|
strcat (buf, ",");
|
|
first = FALSE;
|
|
if (aclbufp[pos].a_type & ACL_DEFAULT)
|
|
strcat (buf, "default");
|
|
switch (aclbufp[pos].a_type)
|
|
{
|
|
case USER_OBJ:
|
|
__small_sprintf (buf + strlen (buf), "user::%s",
|
|
permtostr (aclbufp[pos].a_perm));
|
|
break;
|
|
case USER:
|
|
__small_sprintf (buf + strlen (buf), "user:%d:%s",
|
|
aclbufp[pos].a_id, permtostr (aclbufp[pos].a_perm));
|
|
break;
|
|
case GROUP_OBJ:
|
|
__small_sprintf (buf + strlen (buf), "group::%s",
|
|
permtostr (aclbufp[pos].a_perm));
|
|
break;
|
|
case GROUP:
|
|
__small_sprintf (buf + strlen (buf), "group:%d:%s",
|
|
aclbufp[pos].a_id, permtostr (aclbufp[pos].a_perm));
|
|
break;
|
|
case CLASS_OBJ:
|
|
__small_sprintf (buf + strlen (buf), "mask::%s",
|
|
permtostr (aclbufp[pos].a_perm));
|
|
break;
|
|
case OTHER_OBJ:
|
|
__small_sprintf (buf + strlen (buf), "other::%s",
|
|
permtostr (aclbufp[pos].a_perm));
|
|
break;
|
|
default:
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
}
|
|
return strdup (buf);
|
|
}
|
|
|
|
static mode_t
|
|
permfromstr (char *perm)
|
|
{
|
|
mode_t mode = 0;
|
|
|
|
if (strlen (perm) != 3)
|
|
return 01000;
|
|
if (perm[0] == 'r')
|
|
mode |= S_IRUSR | S_IRGRP | S_IROTH;
|
|
else if (perm[0] != '-')
|
|
return 01000;
|
|
if (perm[1] == 'w')
|
|
mode |= S_IWUSR | S_IWGRP | S_IWOTH;
|
|
else if (perm[1] != '-')
|
|
return 01000;
|
|
if (perm[2] == 'x')
|
|
mode |= S_IXUSR | S_IXGRP | S_IXOTH;
|
|
else if (perm[2] != '-')
|
|
return 01000;
|
|
return mode;
|
|
}
|
|
|
|
extern "C"
|
|
aclent_t *
|
|
aclfromtext (char *acltextp, int *)
|
|
{
|
|
if (!acltextp)
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
char buf[strlen (acltextp) + 1];
|
|
aclent_t lacl[MAX_ACL_ENTRIES];
|
|
memset (lacl, 0, sizeof lacl);
|
|
int pos = 0;
|
|
strcpy (buf, acltextp);
|
|
char *lasts;
|
|
for (char *c = strtok_r (buf, ",", &lasts);
|
|
c;
|
|
c = strtok_r (NULL, ",", &lasts))
|
|
{
|
|
if (!strncmp (c, "default", 7))
|
|
{
|
|
lacl[pos].a_type |= ACL_DEFAULT;
|
|
c += 7;
|
|
}
|
|
if (!strncmp (c, "user:", 5))
|
|
{
|
|
if (c[5] == ':')
|
|
lacl[pos].a_type |= USER_OBJ;
|
|
else
|
|
{
|
|
lacl[pos].a_type |= USER;
|
|
c += 5;
|
|
if (isalpha (*c))
|
|
{
|
|
struct passwd *pw = getpwnam (c);
|
|
if (!pw)
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
lacl[pos].a_id = pw->pw_uid;
|
|
c = strchr (c, ':');
|
|
}
|
|
else if (isdigit (*c))
|
|
lacl[pos].a_id = strtol (c, &c, 10);
|
|
if (!c || *c != ':')
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
else if (!strncmp (c, "group:", 6))
|
|
{
|
|
if (c[5] == ':')
|
|
lacl[pos].a_type |= GROUP_OBJ;
|
|
else
|
|
{
|
|
lacl[pos].a_type |= GROUP;
|
|
c += 5;
|
|
if (isalpha (*c))
|
|
{
|
|
struct group *gr = getgrnam (c);
|
|
if (!gr)
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
lacl[pos].a_id = gr->gr_gid;
|
|
c = strchr (c, ':');
|
|
}
|
|
else if (isdigit (*c))
|
|
lacl[pos].a_id = strtol (c, &c, 10);
|
|
if (!c || *c != ':')
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
else if (!strncmp (c, "mask:", 5))
|
|
{
|
|
if (c[5] == ':')
|
|
lacl[pos].a_type |= CLASS_OBJ;
|
|
else
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
}
|
|
else if (!strncmp (c, "other:", 6))
|
|
{
|
|
if (c[5] == ':')
|
|
lacl[pos].a_type |= OTHER_OBJ;
|
|
else
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
}
|
|
if ((lacl[pos].a_perm = permfromstr (c)) == 01000)
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
++pos;
|
|
}
|
|
aclent_t *aclp = (aclent_t *) malloc (pos * sizeof (aclent_t));
|
|
if (aclp)
|
|
memcpy (aclp, lacl, pos * sizeof (aclent_t));
|
|
return aclp;
|
|
}
|
|
|