|
|
/*
|
|
|
* Copyright (c) 2003-2007 Andrea Luzzardi <scox@sig11.org>
|
|
|
*
|
|
|
* This file is part of the pam_usb project. pam_usb is free software;
|
|
|
* you can redistribute it and/or modify it under the terms of the GNU General
|
|
|
* Public License version 2, as published by the Free Software Foundation.
|
|
|
*
|
|
|
* pam_usb 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, write to the Free Software Foundation, Inc., 51 Franklin
|
|
|
* Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
*/
|
|
|
|
|
|
#include <libxml/xpath.h>
|
|
|
#include <ctype.h>
|
|
|
#include <string.h>
|
|
|
#include "mem.h"
|
|
|
#include "xpath.h"
|
|
|
#include "log.h"
|
|
|
|
|
|
static xmlXPathObject *pusb_xpath_match(xmlDocPtr doc, const char *path)
|
|
|
{
|
|
|
xmlXPathContext *context = NULL;
|
|
|
xmlXPathObject *result = NULL;
|
|
|
|
|
|
context = xmlXPathNewContext(doc);
|
|
|
if (context == NULL)
|
|
|
{
|
|
|
log_error("Unable to create XML context\n");
|
|
|
return (NULL);
|
|
|
}
|
|
|
result = xmlXPathEvalExpression((xmlChar *)path, context);
|
|
|
xmlXPathFreeContext(context);
|
|
|
if (result == NULL)
|
|
|
{
|
|
|
log_error("Error in xmlXPathEvalExpression\n");
|
|
|
return (NULL);
|
|
|
}
|
|
|
if (xmlXPathNodeSetIsEmpty(result->nodesetval))
|
|
|
{
|
|
|
xmlXPathFreeObject(result);
|
|
|
return (NULL);
|
|
|
}
|
|
|
return (result);
|
|
|
}
|
|
|
|
|
|
static int pusb_xpath_strip_string(char *dest, const char *src,
|
|
|
size_t size)
|
|
|
{
|
|
|
int first_char = -1;
|
|
|
int last_char = -1;
|
|
|
int i;
|
|
|
|
|
|
for (i = 0; src[i]; ++i)
|
|
|
{
|
|
|
if (isspace(src[i]))
|
|
|
continue ;
|
|
|
|
|
|
if (first_char == -1)
|
|
|
first_char = i;
|
|
|
last_char = i;
|
|
|
}
|
|
|
|
|
|
if (first_char == -1 || last_char == -1)
|
|
|
return (0);
|
|
|
|
|
|
if ((last_char - first_char) > (size - 1))
|
|
|
{
|
|
|
log_error("Device name is too long: %s", src);
|
|
|
return (0);
|
|
|
}
|
|
|
|
|
|
memset(dest, 0x0, size);
|
|
|
strncpy(dest, &(src[first_char]), last_char - first_char + 1);
|
|
|
return (1);
|
|
|
}
|
|
|
|
|
|
int pusb_xpath_get_string(xmlDocPtr doc, const char *path,
|
|
|
char *value, size_t size)
|
|
|
{
|
|
|
xmlXPathObject *result = NULL;
|
|
|
xmlNode *node = NULL;
|
|
|
xmlChar *result_string = NULL;
|
|
|
|
|
|
if (!(result = pusb_xpath_match(doc, path)))
|
|
|
return (0);
|
|
|
|
|
|
if (result->nodesetval->nodeNr > 1)
|
|
|
{
|
|
|
xmlXPathFreeObject(result);
|
|
|
log_debug("Syntax error: %s: more than one record found\n", path);
|
|
|
return (0);
|
|
|
}
|
|
|
|
|
|
node = result->nodesetval->nodeTab[0]->xmlChildrenNode;
|
|
|
result_string = xmlNodeListGetString(doc, node, 1);
|
|
|
if (!result_string)
|
|
|
{
|
|
|
xmlXPathFreeObject(result);
|
|
|
log_debug("Empty value for %s\n", path);
|
|
|
return (0);
|
|
|
}
|
|
|
if (!pusb_xpath_strip_string(value, (const char *)result_string, size))
|
|
|
{
|
|
|
xmlFree(result_string);
|
|
|
xmlXPathFreeObject(result);
|
|
|
log_debug("Result for %s (%s) is too long (max: %d)\n",
|
|
|
path, (const char *)result_string, size);
|
|
|
return (0);
|
|
|
}
|
|
|
xmlFree(result_string);
|
|
|
xmlXPathFreeObject(result);
|
|
|
return (1);
|
|
|
}
|
|
|
|
|
|
int pusb_xpath_get_string_from(xmlDocPtr doc,
|
|
|
const char *base,
|
|
|
const char *path,
|
|
|
char *value, size_t size)
|
|
|
{
|
|
|
char *xpath = NULL;
|
|
|
size_t xpath_size;
|
|
|
int retval;
|
|
|
|
|
|
xpath_size = strlen(base) + strlen(path) + 1;
|
|
|
xpath = xmalloc(xpath_size);
|
|
|
memset(xpath, 0x00, xpath_size);
|
|
|
snprintf(xpath, xpath_size, "%s%s", base, path);
|
|
|
retval = pusb_xpath_get_string(doc, xpath, value, size);
|
|
|
if (retval)
|
|
|
log_debug("%s%s -> %s\n", base, path, value);
|
|
|
xfree(xpath);
|
|
|
return (retval);
|
|
|
}
|
|
|
|
|
|
int pusb_xpath_get_bool(xmlDocPtr doc, const char *path, int *value)
|
|
|
{
|
|
|
char ret[6]; /* strlen("false") + 1 */
|
|
|
|
|
|
if (!pusb_xpath_get_string(doc, path, ret, sizeof(ret)))
|
|
|
return (0);
|
|
|
|
|
|
if (!strcmp(ret, "true"))
|
|
|
{
|
|
|
*value = 1;
|
|
|
return (1);
|
|
|
}
|
|
|
|
|
|
if (!strcmp(ret, "false"))
|
|
|
{
|
|
|
*value = 0;
|
|
|
return (1);
|
|
|
}
|
|
|
|
|
|
log_debug("Expecting a boolean, got %s\n", ret);
|
|
|
return (0);
|
|
|
}
|
|
|
|
|
|
int pusb_xpath_get_bool_from(xmlDocPtr doc,
|
|
|
const char *base,
|
|
|
const char *path,
|
|
|
int *value)
|
|
|
{
|
|
|
char *xpath = NULL;
|
|
|
size_t xpath_size;
|
|
|
int retval;
|
|
|
|
|
|
xpath_size = strlen(base) + strlen(path) + 1;
|
|
|
xpath = xmalloc(xpath_size);
|
|
|
memset(xpath, 0x00, xpath_size);
|
|
|
snprintf(xpath, xpath_size, "%s%s", base, path);
|
|
|
retval = pusb_xpath_get_bool(doc, xpath, value);
|
|
|
xfree(xpath);
|
|
|
return (retval);
|
|
|
}
|
|
|
|
|
|
int pusb_xpath_get_time(xmlDocPtr doc, const char *path, time_t *value)
|
|
|
{
|
|
|
char ret[64];
|
|
|
char *last;
|
|
|
int coef;
|
|
|
|
|
|
if (!pusb_xpath_get_string(doc, path, ret, sizeof(ret)))
|
|
|
return (0);
|
|
|
|
|
|
last = &(ret[strlen(ret) - 1]);
|
|
|
coef = 1;
|
|
|
if (*last == 's')
|
|
|
coef = 1;
|
|
|
else if (*last == 'm')
|
|
|
coef = 60;
|
|
|
else if (*last == 'h')
|
|
|
coef = 3600;
|
|
|
else if (*last == 'd')
|
|
|
coef = 3600 * 24;
|
|
|
else
|
|
|
if (!isdigit(*last))
|
|
|
{
|
|
|
log_debug("Expecting a time modifier, got %c\n", *last);
|
|
|
return (0);
|
|
|
}
|
|
|
if (!isdigit(*last))
|
|
|
*last = '\0';
|
|
|
*value = atoi(ret) * coef;
|
|
|
|
|
|
return (0);
|
|
|
}
|
|
|
|
|
|
int pusb_xpath_get_time_from(xmlDocPtr doc,
|
|
|
const char *base,
|
|
|
const char *path,
|
|
|
time_t *value)
|
|
|
{
|
|
|
char *xpath = NULL;
|
|
|
size_t xpath_size;
|
|
|
int retval;
|
|
|
|
|
|
xpath_size = strlen(base) + strlen(path) + 1;
|
|
|
xpath = xmalloc(xpath_size);
|
|
|
memset(xpath, 0x00, xpath_size);
|
|
|
snprintf(xpath, xpath_size, "%s%s", base, path);
|
|
|
retval = pusb_xpath_get_time(doc, xpath, value);
|
|
|
xfree(xpath);
|
|
|
return (retval);
|
|
|
}
|
|
|
|
|
|
int pusb_xpath_get_int(xmlDocPtr doc, const char *path, int *value)
|
|
|
{
|
|
|
char ret[64];
|
|
|
|
|
|
if (!pusb_xpath_get_string(doc, path, ret, sizeof(ret)))
|
|
|
return (0);
|
|
|
*value = atoi(ret);
|
|
|
return (1);
|
|
|
}
|
|
|
|
|
|
int pusb_xpath_get_int_from(xmlDocPtr doc,
|
|
|
const char *base,
|
|
|
const char *path,
|
|
|
int *value)
|
|
|
{
|
|
|
char *xpath = NULL;
|
|
|
size_t xpath_size;
|
|
|
int retval;
|
|
|
|
|
|
xpath_size = strlen(base) + strlen(path) + 1;
|
|
|
xpath = xmalloc(xpath_size);
|
|
|
memset(xpath, 0x00, xpath_size);
|
|
|
snprintf(xpath, xpath_size, "%s%s", base, path);
|
|
|
retval = pusb_xpath_get_int(doc, xpath, value);
|
|
|
xfree(xpath);
|
|
|
return (retval);
|
|
|
}
|