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/*
Unix SMB/CIFS implementation.
Winbind client API
Copyright (C) Gerald (Jerry) Carter 2007
Copyright (C) Volker Lendecke 2010
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Required Headers */
#include <stdio.h>
#include "libwbclient.h"
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
/* Convert a sid to a string into a buffer. Return the string
* length. If buflen is too small, return the string length that would
* result if it was long enough. */
int wbcSidToStringBuf(const struct wbcDomainSid *sid, char *buf, int buflen)
{
uint64_t id_auth;
int i, ofs;
if (!sid) {
strncpy(buf, "(NULL SID)", buflen);
buf[buflen < 10 ? buflen :10] = '\0';
return 10; /* strlen("(NULL SID)") */
}
id_auth = (uint64_t)sid->id_auth[5] +
((uint64_t)sid->id_auth[4] << 8) +
((uint64_t)sid->id_auth[3] << 16) +
((uint64_t)sid->id_auth[2] << 24) +
((uint64_t)sid->id_auth[1] << 32) +
((uint64_t)sid->id_auth[0] << 40);
ofs = snprintf(buf, buflen, "S-%hhu-", (unsigned char)sid->sid_rev_num);
if (id_auth >= UINT32_MAX) {
ofs += snprintf(buf + ofs, MAX(buflen - ofs, 0), "0x%llx",
(unsigned long long)id_auth);
} else {
ofs += snprintf(buf + ofs, MAX(buflen - ofs, 0), "%llu",
(unsigned long long)id_auth);
}
for (i = 0; i < sid->num_auths; i++) {
ofs += snprintf(buf + ofs, MAX(buflen - ofs, 0), "-%u",
(unsigned int)sid->sub_auths[i]);
}
return ofs;
}
/* Convert a binary SID to a character string */
wbcErr wbcSidToString(const struct wbcDomainSid *sid,
char **sid_string)
{
char buf[WBC_SID_STRING_BUFLEN];
char *result;
int len;
if (!sid) {
return WBC_ERR_INVALID_SID;
}
len = wbcSidToStringBuf(sid, buf, sizeof(buf));
if (len+1 > sizeof(buf)) {
return WBC_ERR_INVALID_SID;
}
result = (char *)wbcAllocateMemory(len+1, 1, NULL);
if (result == NULL) {
return WBC_ERR_NO_MEMORY;
}
memcpy(result, buf, len+1);
*sid_string = result;
return WBC_ERR_SUCCESS;
}
#define AUTHORITY_MASK (~(0xffffffffffffULL))
/* Convert a character string to a binary SID */
wbcErr wbcStringToSid(const char *str,
struct wbcDomainSid *sid)
{
const char *p;
char *q;
uint64_t x;
wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
if (!sid) {
wbc_status = WBC_ERR_INVALID_PARAM;
BAIL_ON_WBC_ERROR(wbc_status);
}
/* Sanity check for either "S-" or "s-" */
if (!str
|| (str[0]!='S' && str[0]!='s')
|| (str[1]!='-'))
{
wbc_status = WBC_ERR_INVALID_PARAM;
BAIL_ON_WBC_ERROR(wbc_status);
}
/* Get the SID revision number */
p = str+2;
x = (uint64_t)strtoul(p, &q, 10);
if (x==0 || x > UINT8_MAX || !q || *q!='-') {
wbc_status = WBC_ERR_INVALID_SID;
BAIL_ON_WBC_ERROR(wbc_status);
}
sid->sid_rev_num = (uint8_t)x;
/*
* Next the Identifier Authority. This is stored big-endian in a
* 6 byte array. If the authority value is >= UINT_MAX, then it should
* be expressed as a hex value, according to MS-DTYP.
*/
p = q+1;
x = strtoull(p, &q, 0);
if (!q || *q!='-' || (x & AUTHORITY_MASK)) {
wbc_status = WBC_ERR_INVALID_SID;
BAIL_ON_WBC_ERROR(wbc_status);
}
sid->id_auth[5] = (x & 0x0000000000ffULL);
sid->id_auth[4] = (x & 0x00000000ff00ULL) >> 8;
sid->id_auth[3] = (x & 0x000000ff0000ULL) >> 16;
sid->id_auth[2] = (x & 0x0000ff000000ULL) >> 24;
sid->id_auth[1] = (x & 0x00ff00000000ULL) >> 32;
sid->id_auth[0] = (x & 0xff0000000000ULL) >> 40;
/* now read the the subauthorities */
p = q +1;
sid->num_auths = 0;
while (sid->num_auths < WBC_MAXSUBAUTHS) {
x = strtoull(p, &q, 10);
if (p == q)
break;
if (x > UINT32_MAX) {
wbc_status = WBC_ERR_INVALID_SID;
BAIL_ON_WBC_ERROR(wbc_status);
}
sid->sub_auths[sid->num_auths++] = x;
if (*q != '-') {
break;
}
p = q + 1;
}
/* IF we ended early, then the SID could not be converted */
if (q && *q!='\0') {
wbc_status = WBC_ERR_INVALID_SID;
BAIL_ON_WBC_ERROR(wbc_status);
}
wbc_status = WBC_ERR_SUCCESS;
done:
return wbc_status;
}
const char* wbcSidTypeString(enum wbcSidType type)
{
switch (type) {
case WBC_SID_NAME_USE_NONE: return "SID_NONE";
case WBC_SID_NAME_USER: return "SID_USER";
case WBC_SID_NAME_DOM_GRP: return "SID_DOM_GROUP";
case WBC_SID_NAME_DOMAIN: return "SID_DOMAIN";
case WBC_SID_NAME_ALIAS: return "SID_ALIAS";
case WBC_SID_NAME_WKN_GRP: return "SID_WKN_GROUP";
case WBC_SID_NAME_DELETED: return "SID_DELETED";
case WBC_SID_NAME_INVALID: return "SID_INVALID";
case WBC_SID_NAME_UNKNOWN: return "SID_UNKNOWN";
case WBC_SID_NAME_COMPUTER: return "SID_COMPUTER";
default: return "Unknown type";
}
}
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