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/*
SSSD
NSS Responder Interface for ID-SID mappings
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2013 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <errno.h>
#include <nss.h>
#include "sss_client/sss_cli.h"
#include "sss_client/idmap/sss_nss_idmap.h"
#include "util/strtonum.h"
#define DATA_START (3 * sizeof(uint32_t))
union input {
const char *str;
uint32_t id;
};
struct output {
enum sss_id_type type;
union {
char *str;
uint32_t id;
} d;
};
int nss_status_to_errno(enum nss_status nret) {
switch (nret) {
case NSS_STATUS_TRYAGAIN:
return EAGAIN;
case NSS_STATUS_SUCCESS:
return EOK;
case NSS_STATUS_UNAVAIL:
default:
return ENOENT;
}
return EINVAL;
}
static int sss_nss_getyyybyxxx(union input inp, enum sss_cli_command cmd ,
struct output *out)
{
int ret;
size_t inp_len;
struct sss_cli_req_data rd;
uint8_t *repbuf = NULL;
size_t replen;
int errnop;
enum nss_status nret;
uint32_t num_results;
char *str = NULL;
size_t data_len;
uint32_t c;
switch (cmd) {
case SSS_NSS_GETSIDBYNAME:
case SSS_NSS_GETNAMEBYSID:
case SSS_NSS_GETIDBYSID:
ret = sss_strnlen(inp.str, SSS_NAME_MAX, &inp_len);
if (ret != EOK) {
return EINVAL;
}
rd.len = inp_len + 1;
rd.data = inp.str;
break;
case SSS_NSS_GETSIDBYID:
rd.len = sizeof(uint32_t);
rd.data = &inp.id;
break;
default:
return EINVAL;
}
sss_nss_lock();
nret = sss_nss_make_request(cmd, &rd, &repbuf, &replen, &errnop);
if (nret != NSS_STATUS_SUCCESS) {
ret = nss_status_to_errno(nret);
goto done;
}
if (replen < 8) {
ret = EBADMSG;
goto done;
}
num_results = ((uint32_t *)repbuf)[0];
if (num_results == 0) {
ret = ENOENT;
goto done;
} else if (num_results > 1) {
ret = EBADMSG;
goto done;
}
out->type = ((uint32_t *)repbuf)[2];
data_len = replen - DATA_START;
switch(cmd) {
case SSS_NSS_GETSIDBYID:
case SSS_NSS_GETSIDBYNAME:
case SSS_NSS_GETNAMEBYSID:
if (data_len <= 1 || repbuf[replen - 1] != '\0') {
ret = EBADMSG;
goto done;
}
str = malloc(sizeof(char) * data_len);
if (str == NULL) {
ret = ENOMEM;
goto done;
}
strncpy(str, (char *) repbuf + DATA_START, data_len);
out->d.str = str;
break;
case SSS_NSS_GETIDBYSID:
if (data_len != sizeof(uint32_t)) {
ret = EBADMSG;
goto done;
}
SAFEALIGN_COPY_UINT32(&c, repbuf + DATA_START, NULL);
out->d.id = c;
break;
default:
ret = EINVAL;
goto done;
}
ret = EOK;
done:
sss_nss_unlock();
free(repbuf);
if (ret != EOK) {
free(str);
}
return ret;
}
int sss_nss_getsidbyname(const char *fq_name, char **sid,
enum sss_id_type *type)
{
int ret;
union input inp;
struct output out;
if (sid == NULL || fq_name == NULL || *fq_name == '\0') {
return EINVAL;
}
inp.str = fq_name;
ret = sss_nss_getyyybyxxx(inp, SSS_NSS_GETSIDBYNAME, &out);
if (ret == EOK) {
*sid = out.d.str;
*type = out.type;
}
return ret;
}
int sss_nss_getsidbyid(uint32_t id, char **sid, enum sss_id_type *type)
{
int ret;
union input inp;
struct output out;
if (sid == NULL) {
return EINVAL;
}
inp.id = id;
ret = sss_nss_getyyybyxxx(inp, SSS_NSS_GETSIDBYID, &out);
if (ret == EOK) {
*sid = out.d.str;
*type = out.type;
}
return ret;
}
int sss_nss_getnamebysid(const char *sid, char **fq_name,
enum sss_id_type *type)
{
int ret;
union input inp;
struct output out;
if (fq_name == NULL || sid == NULL || *sid == '\0') {
return EINVAL;
}
inp.str = sid;
ret = sss_nss_getyyybyxxx(inp, SSS_NSS_GETNAMEBYSID, &out);
if (ret == EOK) {
*fq_name = out.d.str;
*type = out.type;
}
return ret;
}
int sss_nss_getidbysid(const char *sid, uint32_t *id, enum sss_id_type *id_type)
{
int ret;
union input inp;
struct output out;
if (id == NULL || id_type == NULL || sid == NULL || *sid == '\0') {
return EINVAL;
}
inp.str = sid;
ret = sss_nss_getyyybyxxx(inp, SSS_NSS_GETIDBYSID, &out);
if (ret == EOK) {
*id = out.d.id;
*id_type = out.type;
}
return ret;
}
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