libidmap/common/sidutil.c

1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown/*
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * CDDL HEADER START
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * The contents of this file are subject to the terms of the
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * Common Development and Distribution License (the "License").
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * You may not use this file except in compliance with the License.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * or http://www.opensolaris.org/os/licensing.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * See the License for the specific language governing permissions
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * and limitations under the License.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * When distributing Covered Code, include this CDDL HEADER in each
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * If applicable, add the following below this CDDL HEADER, with the
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * fields enclosed by brackets "[]" replaced with your own identifying
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * information: Portions Copyright [yyyy] [name of copyright owner]
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * CDDL HEADER END
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown */
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown/*
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * Use is subject to license terms.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown */
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown/*
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * This is an extract from usr/src/common/smbsrv/smb_sid.c,
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * with functions renamed as part of a tentative plan for convergence.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown */
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#ifndef _KERNEL
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#include <stdio.h>
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#include <strings.h>
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#include <stdlib.h>
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#include <syslog.h>
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#else /* _KERNEL */
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#include <sys/types.h>
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#include <sys/sunddi.h>
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#endif /* _KERNEL */
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#include <sidutil.h>
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown/*
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * sid_len
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * Returns the number of bytes required to hold the sid.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown */
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownint
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownsid_len(sid_t *sid)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown{
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    if (sid == NULL)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        return (0);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    return (sizeof (sid_t) - sizeof (uint32_t)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        + (sid->sid_subauthcnt * sizeof (uint32_t)));
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown}
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown/*
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * sid_tostr
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * Fill in the passed buffer with the string form of the given
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * binary sid.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown */
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownvoid
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownsid_tostr(sid_t *sid, char *strsid)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown{
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    char *p = strsid;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    int i;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    if (sid == NULL || strsid == NULL)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        return;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    (void) sprintf(p, "S-%d-", sid->sid_revision);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    while (*p)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        p++;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    for (i = 0; i < NT_SID_AUTH_MAX; ++i) {
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        if (sid->sid_authority[i] != 0 || i == NT_SID_AUTH_MAX - 1) {
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown            (void) sprintf(p, "%d", sid->sid_authority[i]);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown            while (*p)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown                p++;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        }
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    }
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    for (i = 0; i < sid->sid_subauthcnt && i < NT_SID_SUBAUTH_MAX; ++i) {
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        (void) sprintf(p, "-%u", sid->sid_subauth[i]);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        while (*p)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown            p++;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    }
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown}
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown/*
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * sid_fromstr
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * Converts a SID in string form to a SID structure. There are lots of
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * simplifying assumptions in here. The memory for the SID is allocated
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * as if it was the largest possible SID; the caller is responsible for
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * freeing the memory when it is no longer required. We assume that the
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * string starts with "S-1-" and that the authority is held in the last
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * byte, which should be okay for most situations. It also assumes the
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * sub-authorities are in decimal format.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * On success, a pointer to a SID is returned. Otherwise a null pointer
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown * is returned.
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown */
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownsid_t *
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownsid_fromstr(char *sidstr)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown{
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    sid_t *sid;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    char *p;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    int size;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    uint8_t i;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    if (sidstr == NULL)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        return (NULL);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    if (strncmp(sidstr, "S-1-", 4) != 0)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        return (NULL);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    size = sizeof (sid_t) + (NT_SID_SUBAUTH_MAX * sizeof (uint32_t));
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    if ((sid = malloc(size)) == NULL)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        return (NULL);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    bzero(sid, size);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    sid->sid_revision = NT_SID_REVISION;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    sid->sid_authority[5] = atoi(&sidstr[4]);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    for (i = 0, p = &sidstr[5]; i < NT_SID_SUBAUTH_MAX && *p; ++i) {
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        while (*p && *p == '-')
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown            ++p;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        if (*p < '0' || *p > '9') {
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown            free(sid);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown            return (NULL);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        }
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        sid->sid_subauth[i] = strtoul(p, NULL, 10);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        while (*p && *p != '-')
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown            ++p;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    }
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    sid->sid_subauthcnt = i;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    return (sid);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown}
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownvoid
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownsid_free(sid_t *sid)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown{
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#ifdef _KERNEL
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    if (sid == NULL)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        return;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    kmem_free(sid, sid_len(sid));
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#else
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    free(sid);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown#endif
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown}
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownvoid
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownsid_to_le(sid_t *sid)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown{
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    int i;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    for (i = 0; i < sid->sid_subauthcnt && i < NT_SID_SUBAUTH_MAX; ++i) {
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        uint32_t v = sid->sid_subauth[i];
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        uint8_t *p = (uint8_t *)&sid->sid_subauth[i];
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        p[0] = v & 0xff;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        p[1] = (v >> 8) & 0xff;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        p[2] = (v >> 16) & 0xff;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        p[3] = (v >> 24) & 0xff;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    }
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown}
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownvoid
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brownsid_from_le(sid_t *sid)
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown{
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    int i;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    for (i = 0; i < sid->sid_subauthcnt && i < NT_SID_SUBAUTH_MAX; ++i) {
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        uint32_t v;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        uint8_t *p = (uint8_t *)&sid->sid_subauth[i];
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        v = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown        sid->sid_subauth[i] = v;
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown    }
1fcced4c370617db71610fecffd5451a5894ca5eJordan Brown}