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author | Stephen Gallagher <sgallagh@redhat.com> | 2010-02-17 09:14:40 -0500 |
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committer | Stephen Gallagher <sgallagh@redhat.com> | 2010-02-18 13:48:44 -0500 |
commit | 8e9ac4d7443939ed0d152708d3877b29252d16fe (patch) | |
tree | b857cd509655146456b0ad624db527c1c3c366f3 /server/sss_client/group.c | |
parent | 29e9f5e711a03135944e30ad241c8182dacc6049 (diff) | |
download | sssd-8e9ac4d7443939ed0d152708d3877b29252d16fe.tar.gz sssd-8e9ac4d7443939ed0d152708d3877b29252d16fe.tar.bz2 sssd-8e9ac4d7443939ed0d152708d3877b29252d16fe.zip |
Eliminate separate build tree for sss_client
Diffstat (limited to 'server/sss_client/group.c')
-rw-r--r-- | server/sss_client/group.c | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/server/sss_client/group.c b/server/sss_client/group.c new file mode 100644 index 00000000..675b8b71 --- /dev/null +++ b/server/sss_client/group.c @@ -0,0 +1,435 @@ +/* + * System Security Services Daemon. NSS client interface + * + * Copyright (C) Simo Sorce 2007 + * + * This program 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 2.1 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 Lesser 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, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* GROUP database NSS interface */ + +#include <nss.h> +#include <errno.h> +#include <sys/types.h> +#include <unistd.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include "sss_cli.h" + +static struct sss_nss_getgrent_data { + size_t len; + size_t ptr; + uint8_t *data; +} sss_nss_getgrent_data; + +static void sss_nss_getgrent_data_clean(void) { + + if (sss_nss_getgrent_data.data != NULL) { + free(sss_nss_getgrent_data.data); + sss_nss_getgrent_data.data = NULL; + } + sss_nss_getgrent_data.len = 0; + sss_nss_getgrent_data.ptr = 0; +} + +/* GETGRNAM Request: + * + * 0-X: string with name + * + * GERTGRGID Request: + * + * 0-7: 32bit number with gid + * + * INITGROUPS Request: + * + * 0-3: 32bit number with gid + * 4-7: 32bit unsigned with max num of entries + * + * Replies: + * + * 0-3: 32bit unsigned number of results + * 4-7: 32bit unsigned (reserved/padding) + * For each result (64bit padded ?): + * 0-3: 32bit number gid + * 4-7: 32bit unsigned number of members + * 8-X: sequence of 0 terminated strings (name, passwd, mem..) + * + * FIXME: do we need to pad so that each result is 32 bit aligned ? + */ +struct sss_nss_gr_rep { + struct group *result; + char *buffer; + size_t buflen; +}; + +static int sss_nss_getgr_readrep(struct sss_nss_gr_rep *pr, + uint8_t *buf, size_t *len) +{ + size_t i, l, slen, ptmem; + ssize_t dlen; + char *sbuf; + uint32_t mem_num; + + if (*len < 11) { /* not enough space for data, bad packet */ + return EBADMSG; + } + + pr->result->gr_gid = ((uint32_t *)buf)[0]; + mem_num = ((uint32_t *)buf)[1]; + + sbuf = (char *)&buf[8]; + slen = *len - 8; + dlen = pr->buflen; + + pr->result->gr_name = &(pr->buffer[0]); + i = 0; + while (slen > i && dlen > 0) { + pr->buffer[i] = sbuf[i]; + if (pr->buffer[i] == '\0') break; + i++; + dlen--; + } + if (slen <= i) { /* premature end of buf */ + return EBADMSG; + } + if (dlen <= 0) { /* not enough memory */ + return ERANGE; /* not ENOMEM, ERANGE is what glibc looks for */ + } + i++; + dlen--; + + pr->result->gr_passwd = &(pr->buffer[i]); + while (slen > i && dlen > 0) { + pr->buffer[i] = sbuf[i]; + if (pr->buffer[i] == '\0') break; + i++; + dlen--; + } + if (slen <= i) { /* premature end of buf */ + return EBADMSG; + } + if (dlen <= 0) { /* not enough memory */ + return ERANGE; /* not ENOMEM, ERANGE is what glibc looks for */ + } + i++; + dlen--; + + /* now members */ + pr->result->gr_mem = (char **)&(pr->buffer[i]); + ptmem = sizeof(char *) * (mem_num + 1); + if (ptmem > dlen) { + return ERANGE; /* not ENOMEM, ERANGE is what glibc looks for */ + } + dlen -= ptmem; + ptmem += i; + pr->result->gr_mem[mem_num] = NULL; /* terminate array */ + + for (l = 0; l < mem_num; l++) { + pr->result->gr_mem[l] = &(pr->buffer[ptmem]); + while ((slen > i) && (dlen > 0)) { + pr->buffer[ptmem] = sbuf[i]; + if (pr->buffer[ptmem] == '\0') break; + i++; + dlen--; + ptmem++; + } + if (slen <= i) { /* premature end of buf */ + return EBADMSG; + } + if (dlen <= 0) { /* not enough memory */ + return ERANGE; /* not ENOMEM, ERANGE is what glibc looks for */ + } + i++; + dlen--; + ptmem++; + } + + *len = slen -i; + return 0; +} + +/* INITGROUP Reply: + * + * 0-3: 32bit unsigned number of results + * 4-7: 32bit unsigned (reserved/padding) + * For each result: + * 0-4: 32bit number with gid + */ + + +enum nss_status _nss_sss_initgroups_dyn(const char *user, gid_t group, + long int *start, long int *size, + gid_t **groups, long int limit, + int *errnop) +{ + struct sss_cli_req_data rd; + uint8_t *repbuf; + size_t replen; + enum nss_status nret; + uint32_t *rbuf; + uint32_t num_ret; + long int l, max_ret; + + rd.len = strlen(user) +1; + rd.data = user; + + nret = sss_nss_make_request(SSS_NSS_INITGR, &rd, + &repbuf, &replen, errnop); + if (nret != NSS_STATUS_SUCCESS) { + return nret; + } + + /* no results if not found */ + num_ret = ((uint32_t *)repbuf)[0]; + if (num_ret == 0) { + free(repbuf); + return NSS_STATUS_NOTFOUND; + } + max_ret = num_ret; + + /* check we have enough space in the buffer */ + if ((*size - *start) < num_ret) { + long int newsize; + gid_t *newgroups; + + newsize = *size + num_ret; + if ((limit > 0) && (newsize > limit)) { + newsize = limit; + max_ret = newsize - *start; + } + + newgroups = (gid_t *)realloc((*groups), newsize * sizeof(**groups)); + if (!newgroups) { + *errnop = ENOMEM; + free(repbuf); + return NSS_STATUS_TRYAGAIN; + } + *groups = newgroups; + *size = newsize; + } + + rbuf = &((uint32_t *)repbuf)[2]; + for (l = 0; l < max_ret; l++) { + (*groups)[*start] = rbuf[l]; + *start += 1; + } + + return NSS_STATUS_SUCCESS; +} + + +enum nss_status _nss_sss_getgrnam_r(const char *name, struct group *result, + char *buffer, size_t buflen, int *errnop) +{ + struct sss_cli_req_data rd; + struct sss_nss_gr_rep grrep; + uint8_t *repbuf; + size_t replen, len; + enum nss_status nret; + int ret; + + /* Caught once glibc passing in buffer == 0x0 */ + if (!buffer || !buflen) return ERANGE; + + rd.len = strlen(name) + 1; + rd.data = name; + + nret = sss_nss_make_request(SSS_NSS_GETGRNAM, &rd, + &repbuf, &replen, errnop); + if (nret != NSS_STATUS_SUCCESS) { + return nret; + } + + grrep.result = result; + grrep.buffer = buffer; + grrep.buflen = buflen; + + /* no results if not found */ + if (((uint32_t *)repbuf)[0] == 0) { + free(repbuf); + return NSS_STATUS_NOTFOUND; + } + + /* only 1 result is accepted for this function */ + if (((uint32_t *)repbuf)[0] != 1) { + *errnop = EBADMSG; + return NSS_STATUS_TRYAGAIN; + } + + len = replen - 8; + ret = sss_nss_getgr_readrep(&grrep, repbuf+8, &len); + free(repbuf); + if (ret) { + *errnop = ret; + return NSS_STATUS_TRYAGAIN; + } + + return NSS_STATUS_SUCCESS; +} + +enum nss_status _nss_sss_getgrgid_r(gid_t gid, struct group *result, + char *buffer, size_t buflen, int *errnop) +{ + struct sss_cli_req_data rd; + struct sss_nss_gr_rep grrep; + uint8_t *repbuf; + size_t replen, len; + enum nss_status nret; + uint32_t group_gid; + int ret; + + /* Caught once glibc passing in buffer == 0x0 */ + if (!buffer || !buflen) return ERANGE; + + group_gid = gid; + rd.len = sizeof(uint32_t); + rd.data = &group_gid; + + nret = sss_nss_make_request(SSS_NSS_GETGRGID, &rd, + &repbuf, &replen, errnop); + if (nret != NSS_STATUS_SUCCESS) { + return nret; + } + + grrep.result = result; + grrep.buffer = buffer; + grrep.buflen = buflen; + + /* no results if not found */ + if (((uint32_t *)repbuf)[0] == 0) { + free(repbuf); + return NSS_STATUS_NOTFOUND; + } + + /* only 1 result is accepted for this function */ + if (((uint32_t *)repbuf)[0] != 1) { + *errnop = EBADMSG; + return NSS_STATUS_TRYAGAIN; + } + + len = replen - 8; + ret = sss_nss_getgr_readrep(&grrep, repbuf+8, &len); + free(repbuf); + if (ret) { + *errnop = ret; + return NSS_STATUS_TRYAGAIN; + } + + return NSS_STATUS_SUCCESS; +} + +enum nss_status _nss_sss_setgrent(void) +{ + enum nss_status nret; + int errnop; + + /* make sure we do not have leftovers, and release memory */ + sss_nss_getgrent_data_clean(); + + nret = sss_nss_make_request(SSS_NSS_SETGRENT, + NULL, NULL, NULL, &errnop); + if (nret != NSS_STATUS_SUCCESS) { + errno = errnop; + return nret; + } + + return NSS_STATUS_SUCCESS; +} + +enum nss_status _nss_sss_getgrent_r(struct group *result, + char *buffer, size_t buflen, int *errnop) +{ + struct sss_cli_req_data rd; + struct sss_nss_gr_rep grrep; + uint8_t *repbuf; + size_t replen; + enum nss_status nret; + uint32_t num_entries; + int ret; + + /* Caught once glibc passing in buffer == 0x0 */ + if (!buffer || !buflen) return ERANGE; + + /* if there are leftovers return the next one */ + if (sss_nss_getgrent_data.data != NULL && + sss_nss_getgrent_data.ptr < sss_nss_getgrent_data.len) { + + repbuf = (uint8_t *)sss_nss_getgrent_data.data + + sss_nss_getgrent_data.ptr; + replen = sss_nss_getgrent_data.len - + sss_nss_getgrent_data.ptr; + + grrep.result = result; + grrep.buffer = buffer; + grrep.buflen = buflen; + + ret = sss_nss_getgr_readrep(&grrep, repbuf, &replen); + if (ret) { + *errnop = ret; + return NSS_STATUS_TRYAGAIN; + } + + /* advance buffer pointer */ + sss_nss_getgrent_data.ptr = sss_nss_getgrent_data.len - replen; + + return NSS_STATUS_SUCCESS; + } + + /* release memory if any */ + sss_nss_getgrent_data_clean(); + + /* retrieve no more than SSS_NSS_MAX_ENTRIES at a time */ + num_entries = SSS_NSS_MAX_ENTRIES; + rd.len = sizeof(uint32_t); + rd.data = &num_entries; + + nret = sss_nss_make_request(SSS_NSS_GETGRENT, &rd, + &repbuf, &replen, errnop); + if (nret != NSS_STATUS_SUCCESS) { + return nret; + } + + /* no results if not found */ + if ((((uint32_t *)repbuf)[0] == 0) || (replen - 8 == 0)) { + free(repbuf); + return NSS_STATUS_NOTFOUND; + } + + sss_nss_getgrent_data.data = repbuf; + sss_nss_getgrent_data.len = replen; + sss_nss_getgrent_data.ptr = 8; /* skip metadata fields */ + + /* call again ourselves, this will return the first result */ + return _nss_sss_getgrent_r(result, buffer, buflen, errnop); +} + +enum nss_status _nss_sss_endgrent(void) +{ + enum nss_status nret; + int errnop; + + /* make sure we do not have leftovers, and release memory */ + sss_nss_getgrent_data_clean(); + + nret = sss_nss_make_request(SSS_NSS_ENDGRENT, + NULL, NULL, NULL, &errnop); + if (nret != NSS_STATUS_SUCCESS) { + errno = errnop; + return nret; + } + + return NSS_STATUS_SUCCESS; +} |