Eliminate separate build tree for sss_client

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 000000000..675b8b71e
--- /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;
+}