OpenSolaris_b135/lib/libtsol/common/stob.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* String to binary label translations.
*/
#include <ctype.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <tsol/label.h>
#include "labeld.h"
#include <sys/tsol/label_macro.h>
#undef CALL_SIZE
#define CALL_SIZE(type, buf) (size_t)(sizeof (type) - BUFSIZE + sizeof (int)\
+ (buf))
#if !defined(TEXT_DOMAIN) /* should be defined by Makefiles */
#define TEXT_DOMAIN "SYS_TEST"
#endif /* TEXT_DOMAIN */
/* short hands */
#define IS_ADMIN_LOW(sl) \
((strncasecmp(sl, ADMIN_LOW, (sizeof (ADMIN_LOW) - 1)) == 0))
#define IS_ADMIN_HIGH(sh) \
((strncasecmp(sh, ADMIN_HIGH, (sizeof (ADMIN_HIGH) - 1)) == 0))
#define ISHEX(f, s) \
(((((f) & NEW_LABEL) == ((f) | NEW_LABEL)) || \
(((f) & NO_CORRECTION) == ((f) | NO_CORRECTION))) && \
(((s)[0] == '0') && (((s)[1] == 'x') || ((s)[1] == 'X'))))
#define slcall callp->param.acall.cargs.stobsl_arg
#define slret callp->param.aret.rvals.stobsl_ret
/*
* stobsl - Translate Sensitivity Label string to a Binary Sensitivity
* Label.
*
* Entry string = Sensitivity Label string to be translated.
* label = Address of Binary Sensitivity Label to be initialized or
* updated.
* flags = Flags to control translation:
* NO_CORRECTION implies NEW_LABEL.
* NEW_LABEL, Initialize the label to a valid empty
* Sensitivity Label structure.
* NO_CORRECTION, Initialize the label to a valid
* empty Sensitivity Label structure.
* Prohibit correction to the Sensitivity Label.
* Other, pass existing Sensitivity Label through for
* modification.
*
* Exit label = Translated (updated) Binary Sensitivity Label.
* error = If error reported, the error indicator,
* -1, Unable to access label encodings file;
* 0, Invalid binary label passed;
* >0, Position after the first character in
* string of error, 1 indicates entire string.
* Otherwise, unchanged.
*
* Returns 0, If error.
* 1, If successful.
*
* Calls __call_labeld(STOBSL), ISHEX, htobsl, strlen,
* isspace,
* strncasecmp.
*
* Uses ADMIN_HIGH, ADMIN_LOW.
*/
int
stobsl(const char *string, bslabel_t *label, int flags, int *error)
{
labeld_data_t call;
labeld_data_t *callp = &call;
size_t bufsize = sizeof (labeld_data_t);
size_t datasize = CALL_SIZE(stobsl_call_t, strlen(string) + 1);
int rval;
char *s = (char *)string;
while (isspace(*s))
s++;
/* accept a leading '[' */
if (*s == '[') {
s++;
while (isspace(*s))
s++;
}
if (ISHEX(flags, s)) {
if (htobsl(s, label)) {
return (1);
} else {
if (error != NULL)
*error = 1;
return (0);
}
}
if (datasize > bufsize) {
if ((callp = malloc(datasize)) == NULL) {
if (error != NULL)
*error = -1;
return (0);
}
bufsize = datasize;
}
callp->callop = STOBSL;
slcall.flags = (flags&NEW_LABEL) ? LABELS_NEW_LABEL : 0;
slcall.flags |= (flags&NO_CORRECTION) ? LABELS_FULL_PARSE : 0;
slcall.label = *label;
(void) strcpy(slcall.string, string);
if ((rval = __call_labeld(&callp, &bufsize, &datasize)) == SUCCESS) {
int err = callp->reterr;
if (callp != &call) {
/* free allocated buffer */
free(callp);
}
/*
* reterr == 0, OK,
* reterr < 0, invalid binary label,
* reterr > 0 error position, 1 == whole string
*/
if (err == 0) {
*label = slret.label;
return (1);
} else if (err < 0) {
err = 0;
}
if (error != NULL)
*error = err;
return (0);
} else if (rval == NOSERVER) {
if (callp != &call) {
/* free allocated buffer */
free(callp);
}
/* server not present */
/* special case Admin High and Admin Low */
if (IS_ADMIN_LOW(s)) {
BSLLOW(label);
} else if (IS_ADMIN_HIGH(s)) {
BSLHIGH(label);
} else {
goto err1;
}
return (1);
}
if (callp != &call) {
/* free allocated buffer */
free(callp);
}
err1:
if (error != NULL)
*error = -1;
return (0);
} /* stobsl */
#undef slcall
#undef slret
#define clrcall callp->param.acall.cargs.stobclear_arg
#define clrret callp->param.aret.rvals.stobclear_ret
/*
* stobclear - Translate Clearance string to a Binary Clearance.
*
* Entry string = Clearance string to be translated.
* clearance = Address of Binary Clearance to be initialized or
* updated.
* flags = Flags to control translation:
* NO_CORRECTION implies NEW_LABEL.
* NEW_LABEL, Initialize the label to a valid empty
* Sensitivity Label structure.
* NO_CORRECTION, Initialize the label to a valid
* empty Sensitivity Label structure.
* Prohibit correction to the Sensitivity Label.
* Other, pass existing Sensitivity Label through for
* modification.
*
* Exit clearance = Translated (updated) Binary Clearance.
* error = If error reported, the error indicator,
* -1, Unable to access label encodings file;
* 0, Invalid binary label passed;
* >0, Position after the first character in
* string of error, 1 indicates entire string.
* Otherwise, unchanged.
*
* Returns 0, If error.
* 1, If successful.
*
* Calls __call_labeld(STOBCLEAR), ISHEX, htobsl, strlen,
* isspace,
* strncasecmp.
*
* Uses ADMIN_HIGH, ADMIN_LOW.
*/
int
stobclear(const char *string, bclear_t *clearance, int flags, int *error)
{
labeld_data_t call;
labeld_data_t *callp = &call;
size_t bufsize = sizeof (labeld_data_t);
size_t datasize = CALL_SIZE(stobclear_call_t, strlen(string) + 1);
int rval;
if (ISHEX(flags, string)) {
if (htobclear(string, clearance)) {
return (1);
} else {
if (error != NULL)
*error = 1;
return (0);
}
}
if (datasize > bufsize) {
if ((callp = malloc(datasize)) == NULL) {
if (error != NULL)
*error = -1;
return (0);
}
bufsize = datasize;
}
callp->callop = STOBCLEAR;
clrcall.flags = (flags&NEW_LABEL) ? LABELS_NEW_LABEL : 0;
clrcall.flags |= (flags&NO_CORRECTION) ? LABELS_FULL_PARSE : 0;
clrcall.clear = *clearance;
(void) strcpy(clrcall.string, string);
if ((rval = __call_labeld(&callp, &bufsize, &datasize)) == SUCCESS) {
int err = callp->reterr;
if (callp != &call) {
/* free allocated buffer */
free(callp);
}
/*
* reterr == 0, OK,
* reterr < 0, invalid binary label,
* reterr > 0 error position, 1 == whole string
*/
if (err == 0) {
*clearance = clrret.clear;
return (1);
} else if (err < 0) {
err = 0;
}
if (error != NULL)
*error = err;
return (0);
} else if (rval == NOSERVER) {
char *s = (char *)string;
if (callp != &call) {
/* free allocated buffer */
free(callp);
}
/* server not present */
/* special case Admin High and Admin Low */
while (isspace(*s))
s++;
if (IS_ADMIN_LOW(s)) {
BCLEARLOW(clearance);
} else if (IS_ADMIN_HIGH(s)) {
BCLEARHIGH(clearance);
} else {
goto err1;
}
return (1);
}
if (callp != &call) {
/* free allocated buffer */
free(callp);
}
err1:
if (error != NULL)
*error = -1;
return (0);
} /* stobclear */
#undef clrcall
#undef clrret