mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-23 01:53:46 +01:00
2de14c39b5
o Rename internal library functions so that they are prefixed with _posix1e or _POSIX1E, removing them from the application namespace (and potential conflict with other ACL functions elsewhere in the system). Obtained from: TrustedBSD Project
232 lines
5.2 KiB
C
232 lines
5.2 KiB
C
/*-
|
|
* Copyright (c) 1999, 2000, 2001 Robert N. M. Watson
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
/*
|
|
* acl_from_text: Convert a text-form ACL from a string to an acl_t.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/acl.h>
|
|
#include <sys/errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "acl_support.h"
|
|
|
|
static char *
|
|
string_skip_whitespace(char *string)
|
|
{
|
|
|
|
while (*string && ((*string == ' ') || (*string == '\t'))) {
|
|
string++;
|
|
}
|
|
return (string);
|
|
}
|
|
|
|
static void
|
|
string_trim_trailing_whitespace(char *string)
|
|
{
|
|
char *end;
|
|
|
|
if (*string == '\0')
|
|
return;
|
|
|
|
end = string + strlen(string) - 1;
|
|
|
|
while (end != string) {
|
|
if ((*end == ' ') || (*end == '\t')) {
|
|
*end = '\0';
|
|
end--;
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
acl_tag_t
|
|
acl_string_to_tag(char *tag, char *qualifier)
|
|
{
|
|
|
|
if (*qualifier == '\0') {
|
|
if ((!strcmp(tag, "user")) || (!strcmp(tag, "u"))) {
|
|
return (ACL_USER_OBJ);
|
|
} else
|
|
if ((!strcmp(tag, "group")) || (!strcmp(tag, "g"))) {
|
|
return (ACL_GROUP_OBJ);
|
|
} else
|
|
if ((!strcmp(tag, "mask")) || (!strcmp(tag, "m"))) {
|
|
return (ACL_MASK);
|
|
} else
|
|
if ((!strcmp(tag, "other")) || (!strcmp(tag, "o"))) {
|
|
return (ACL_OTHER);
|
|
} else
|
|
return(-1);
|
|
} else {
|
|
if ((!strcmp(tag, "user")) || (!strcmp(tag, "u"))) {
|
|
return(ACL_USER);
|
|
} else
|
|
if ((!strcmp(tag, "group")) || (!strcmp(tag, "g"))) {
|
|
return(ACL_GROUP);
|
|
} else
|
|
return(-1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* acl_from_text -- Convert a string into an ACL.
|
|
* Postpone most validity checking until the end and call acl_valid() to do
|
|
* that.
|
|
*/
|
|
acl_t
|
|
acl_from_text(const char *buf_p)
|
|
{
|
|
acl_tag_t t;
|
|
acl_perm_t p;
|
|
acl_t acl;
|
|
uid_t id;
|
|
char *mybuf_p, *line, *cur, *notcomment, *comment, *entry;
|
|
char *tag, *qualifier, *permission;
|
|
int error;
|
|
|
|
/* Local copy we can mess up. */
|
|
mybuf_p = strdup(buf_p);
|
|
if (!mybuf_p)
|
|
return(NULL);
|
|
|
|
acl = acl_init(3);
|
|
if (!acl) {
|
|
free(mybuf_p);
|
|
return(NULL);
|
|
}
|
|
|
|
/* Outer loop: delimit at \n boundaries. */
|
|
cur = mybuf_p;
|
|
while ((line = strsep(&cur, "\n"))) {
|
|
/* Now split the line on the first # to strip out comments. */
|
|
comment = line;
|
|
notcomment = strsep(&comment, "#");
|
|
|
|
/* Inner loop: delimit at ',' boundaries. */
|
|
while ((entry = strsep(¬comment, ","))) {
|
|
/* Now split into three ':' delimited fields. */
|
|
tag = strsep(&entry, ":");
|
|
if (!tag) {
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
tag = string_skip_whitespace(tag);
|
|
if ((*tag == '\0') && (!entry)) {
|
|
/*
|
|
* Is an entirely comment line, skip to next
|
|
* comma.
|
|
*/
|
|
continue;
|
|
}
|
|
string_trim_trailing_whitespace(tag);
|
|
|
|
qualifier = strsep(&entry, ":");
|
|
if (!qualifier) {
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
qualifier = string_skip_whitespace(qualifier);
|
|
string_trim_trailing_whitespace(qualifier);
|
|
|
|
permission = strsep(&entry, ":");
|
|
if ((!permission) || (entry)) {
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
permission = string_skip_whitespace(permission);
|
|
string_trim_trailing_whitespace(permission);
|
|
|
|
t = acl_string_to_tag(tag, qualifier);
|
|
if (t == -1) {
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
|
|
error = _posix1e_acl_string_to_perm(permission, &p);
|
|
if (error == -1) {
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
|
|
switch(t) {
|
|
case ACL_USER_OBJ:
|
|
case ACL_GROUP_OBJ:
|
|
case ACL_MASK:
|
|
case ACL_OTHER:
|
|
if (*qualifier != '\0') {
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
id = 0;
|
|
break;
|
|
|
|
case ACL_USER:
|
|
case ACL_GROUP:
|
|
error = _posix1e_acl_name_to_id(t, qualifier,
|
|
&id);
|
|
if (error == -1)
|
|
goto error_label;
|
|
break;
|
|
|
|
default:
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
|
|
error = _posix1e_acl_add_entry(acl, t, id, p);
|
|
if (error == -1)
|
|
goto error_label;
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
/* XXX Should we only return ACLs valid according to acl_valid? */
|
|
/* Verify validity of the ACL we read in. */
|
|
if (acl_valid(acl) == -1) {
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
#endif
|
|
|
|
return(acl);
|
|
|
|
error_label:
|
|
acl_free(acl);
|
|
free(mybuf_p);
|
|
return(NULL);
|
|
}
|
|
|
|
|
|
|