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/*-
* Copyright (c) 2004 Apple Inc.
* Copyright (c) 2006 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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.
*
* $P4: //depot/projects/trustedbsd/openbsm/libbsm/bsm_flags.c#16 $
*/
#include <config/config.h>
#include <bsm/libbsm.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#ifndef HAVE_STRLCPY
#include <compat/strlcpy.h>
#endif
static const char *flagdelim = ",";
/*
* Convert the character representation of audit values into the au_mask_t
* field.
*/
int
getauditflagsbin(char *auditstr, au_mask_t *masks)
{
char class_ent_name[AU_CLASS_NAME_MAX];
char class_ent_desc[AU_CLASS_DESC_MAX];
struct au_class_ent c;
char *tok;
char sel, sub;
char *last;
bzero(&c, sizeof(c));
bzero(class_ent_name, sizeof(class_ent_name));
bzero(class_ent_desc, sizeof(class_ent_desc));
c.ac_name = class_ent_name;
c.ac_desc = class_ent_desc;
masks->am_success = 0;
masks->am_failure = 0;
tok = strtok_r(auditstr, flagdelim, &last);
while (tok != NULL) {
/* Check for the events that should not be audited. */
if (tok[0] == '^') {
sub = 1;
tok++;
} else
sub = 0;
/* Check for the events to be audited for success. */
if (tok[0] == '+') {
sel = AU_PRS_SUCCESS;
tok++;
} else if (tok[0] == '-') {
sel = AU_PRS_FAILURE;
tok++;
} else
sel = AU_PRS_BOTH;
if ((getauclassnam_r(&c, tok)) != NULL) {
if (sub)
SUB_FROM_MASK(masks, c.ac_class, sel);
else
ADD_TO_MASK(masks, c.ac_class, sel);
} else {
errno = EINVAL;
return (-1);
}
/* Get the next class. */
tok = strtok_r(NULL, flagdelim, &last);
}
return (0);
}
/*
* Convert the au_mask_t fields into a string value. If verbose is non-zero
* the long flag names are used else the short (2-character)flag names are
* used.
*
* XXXRW: If bits are specified that are not matched by any class, they are
* omitted rather than rejected with EINVAL.
*
* XXXRW: This is not thread-safe as it relies on atomicity between
* setauclass() and sequential calls to getauclassent(). This could be
* fixed by iterating through the bitmask fields rather than iterating
* through the classes.
*/
int
getauditflagschar(char *auditstr, au_mask_t *masks, int verbose)
{
char class_ent_name[AU_CLASS_NAME_MAX];
char class_ent_desc[AU_CLASS_DESC_MAX];
struct au_class_ent c;
char *strptr = auditstr;
u_char sel;
bzero(&c, sizeof(c));
bzero(class_ent_name, sizeof(class_ent_name));
bzero(class_ent_desc, sizeof(class_ent_desc));
c.ac_name = class_ent_name;
c.ac_desc = class_ent_desc;
/*
* Enumerate the class entries, check if each is selected in either
* the success or failure masks.
*/
setauclass();
while ((getauclassent_r(&c)) != NULL) {
sel = 0;
/* Dont do anything for class = no. */
if (c.ac_class == 0)
continue;
sel |= ((c.ac_class & masks->am_success) == c.ac_class) ?
AU_PRS_SUCCESS : 0;
sel |= ((c.ac_class & masks->am_failure) == c.ac_class) ?
AU_PRS_FAILURE : 0;
/*
* No prefix should be attached if both success and failure
* are selected.
*/
if ((sel & AU_PRS_BOTH) == 0) {
if ((sel & AU_PRS_SUCCESS) != 0) {
*strptr = '+';
strptr = strptr + 1;
} else if ((sel & AU_PRS_FAILURE) != 0) {
*strptr = '-';
strptr = strptr + 1;
}
}
if (sel != 0) {
if (verbose) {
strlcpy(strptr, c.ac_desc, AU_CLASS_DESC_MAX);
strptr += strlen(c.ac_desc);
} else {
strlcpy(strptr, c.ac_name, AU_CLASS_NAME_MAX);
strptr += strlen(c.ac_name);
}
*strptr = ','; /* delimiter */
strptr = strptr + 1;
}
}
/* Overwrite the last delimiter with the string terminator. */
if (strptr != auditstr)
*(strptr-1) = '\0';
return (0);
}
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