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/*
* cib_secrets.c
*
* Author: Dejan Muhamedagic <dejan@suse.de>
* Copyright (c) 2011 SUSE, Attachmate
*
* 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 2 of the License, or (at your option) any later version.
*
* This software 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <lha_internal.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <glib.h>
#include <pils/plugin.h>
#include <pils/generic.h>
#include <clplumbing/GSource.h>
#include <clplumbing/lsb_exitcodes.h>
#include <clplumbing/cl_signal.h>
#include <clplumbing/proctrack.h>
#include <clplumbing/coredumps.h>
#include <clplumbing/uids.h>
#include <clplumbing/Gmain_timeout.h>
#include <clplumbing/cl_pidfile.h>
#include <clplumbing/realtime.h>
#include <clplumbing/md5.h>
#include <ha_msg.h>
#include <lrm/lrm_api.h>
#include <lrm/lrm_msg.h>
#include <lrmd.h>
int replace_secret_params(char *rsc_id, GHashTable* params);
static int is_magic_value(char *p);
static int check_md5_hash(char *hash, char *value);
static void add_secret_params(gpointer key, gpointer value, gpointer user_data);
static char *read_local_file(char *local_file);
#define MAGIC "lrm://"
static int
is_magic_value(char *p)
{
return !strcmp(p, MAGIC);
}
#define MD5LEN 16
static int
check_md5_hash(char *hash, char *value)
{
int i;
char hash2[2*MD5LEN+1];
unsigned char binary[MD5LEN+1];
MD5((unsigned char *)value, strlen(value), binary);
for (i = 0; i < MD5LEN; i++)
sprintf(hash2+2*i, "%02x", binary[i]);
hash2[2*i] = '\0';
lrmd_debug2(LOG_DEBUG
, "%s:%d: hash: %s, calculated hash: %s"
, __FUNCTION__, __LINE__, hash, hash2);
return !strcmp(hash, hash2);
}
static char *
read_local_file(char *local_file)
{
FILE *fp = fopen(local_file, "r");
char buf[MAX_VALUE_LEN+1];
char *p;
if (!fp) {
if (errno != ENOENT) {
cl_perror("%s:%d: cannot open %s"
, __FUNCTION__, __LINE__, local_file);
}
return NULL;
}
if (!fgets(buf, MAX_VALUE_LEN, fp)) {
cl_perror("%s:%d: cannot read %s"
, __FUNCTION__, __LINE__, local_file);
return NULL;
}
/* strip white space */
for (p = buf+strlen(buf)-1; p >= buf && isspace(*p); p--)
;
*(p+1) = '\0';
return g_strdup(buf);
}
/*
* returns 0 on success or no replacements necessary
* returns -1 if replacement failed for whatever reasone
*/
int
replace_secret_params(char *rsc_id, GHashTable* params)
{
char local_file[FILENAME_MAX+1], *start_pname;
char hash_file[FILENAME_MAX+1], *hash;
GList *secret_params = NULL, *l;
char *key, *pvalue, *secret_value;
int rc = 0;
/* secret_params could be cached with the resource;
* there are also parameters sent with operations
* which cannot be cached
*/
g_hash_table_foreach(params, add_secret_params, &secret_params);
if (!secret_params) /* none found? */
return 0;
lrmd_debug(LOG_DEBUG
, "%s:%d: replace secret parameters for resource %s"
, __FUNCTION__, __LINE__, rsc_id);
if (snprintf(local_file, FILENAME_MAX,
LRM_CIBSECRETS "/%s/", rsc_id) > FILENAME_MAX) {
lrmd_log(LOG_ERR
, "%s:%d: filename size exceeded for resource %s"
, __FUNCTION__, __LINE__, rsc_id);
return -1;
}
start_pname = local_file + strlen(local_file);
for (l = g_list_first(secret_params); l; l = g_list_next(l)) {
key = (char *)(l->data);
pvalue = g_hash_table_lookup(params, key);
if (!pvalue) { /* this cannot really happen */
lrmd_log(LOG_ERR
, "%s:%d: odd, no parameter %s for rsc %s found now"
, __FUNCTION__, __LINE__, key, rsc_id);
continue;
}
if ((strlen(key) + strlen(local_file)) >= FILENAME_MAX-2) {
lrmd_log(LOG_ERR
, "%s:%d: parameter name %s too big"
, __FUNCTION__, __LINE__, key);
rc = -1;
continue;
}
strcpy(start_pname, key);
secret_value = read_local_file(local_file);
if (!secret_value) {
lrmd_log(LOG_ERR
, "%s:%d: secret for rsc %s parameter %s "
"not found in " LRM_CIBSECRETS
, __FUNCTION__, __LINE__, rsc_id, key);
rc = -1;
continue;
}
strcpy(hash_file, local_file);
if (strlen(hash_file) + 5 > FILENAME_MAX) {
lrmd_log(LOG_ERR
, "%s:%d: cannot build such a long name "
"for the sign file: %s.sign"
, __FUNCTION__, __LINE__, hash_file);
} else {
strncat(hash_file, ".sign", 5);
hash = read_local_file(hash_file);
if (!check_md5_hash(hash, secret_value)) {
lrmd_log(LOG_ERR
, "%s:%d: md5 sum for rsc %s parameter %s "
"does not match"
, __FUNCTION__, __LINE__, rsc_id, key);
g_free(secret_value);
g_free(hash);
rc = -1;
continue;
}
g_free(hash);
}
g_hash_table_replace(params, g_strdup(key), secret_value);
}
g_list_free(secret_params);
return rc;
}
static void
add_secret_params(gpointer key, gpointer value, gpointer user_data)
{
GList **lp = (GList **)user_data;
if (is_magic_value((char *)value))
*lp = g_list_append(*lp, (char *)key);
}
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