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/*
* OpenConnect (SSL + DTLS) VPN client
*
* Copyright © 2008-2015 Intel Corporation.
* Copyright © 2008 Nick Andrew <nick@nick-andrew.net>
*
* Author: David Woodhouse <dwmw2@infradead.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1, as published by the Free Software Foundation.
*
* 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.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include "openconnect-internal.h"
ssize_t read_file_into_string(struct openconnect_info *vpninfo, const char *fname,
char **ptr)
{
int fd, len;
struct stat st;
char *buf;
fd = openconnect_open_utf8(vpninfo, fname, O_RDONLY|O_BINARY);
if (fd < 0) {
vpn_progress(vpninfo, PRG_ERR,
_("Failed to open %s: %s\n"),
fname, strerror(errno));
return -ENOENT;
}
if (fstat(fd, &st)) {
vpn_progress(vpninfo, PRG_ERR,
_("Failed to fstat() %s: %s\n"),
fname, strerror(errno));
close(fd);
return -EIO;
}
len = st.st_size;
buf = malloc(len + 1);
if (!buf) {
vpn_progress(vpninfo, PRG_ERR,
_("Failed to allocate %d bytes for %s\n"),
len + 1, fname);
close(fd);
return -ENOMEM;
}
if (read(fd, buf, len) != len) {
vpn_progress(vpninfo, PRG_ERR,
_("Failed to read %s: %s\n"),
fname, strerror(errno));
free(buf);
close(fd);
return -EIO;
}
buf[len] = 0;
close(fd);
*ptr = buf;
return len;
}
static char *fetch_and_trim(xmlNode *node)
{
char *str = (char *)xmlNodeGetContent(node), *p;
int i, len;
if (!str)
return NULL;
len = strlen(str);
for (i = len-1; i >= 0; i--) {
if (isspace((int)(unsigned char)str[i]))
str[i] = 0;
else
break;
}
for (p = str; isspace((int)(unsigned char)*p); p++)
;
if (p == str)
return str;
p = strdup(p);
free(str);
return p;
}
int config_lookup_host(struct openconnect_info *vpninfo, const char *host)
{
int i;
ssize_t size;
char *xmlfile;
unsigned char sha1[SHA1_SIZE];
xmlDocPtr xml_doc;
xmlNode *xml_node, *xml_node2;
if (!vpninfo->xmlconfig)
return 0;
size = read_file_into_string(vpninfo, vpninfo->xmlconfig, &xmlfile);
if (size == -ENOENT) {
fprintf(stderr, _("Treating host \"%s\" as a raw hostname\n"), host);
return 0;
} else if (size <= 0) {
return size;
}
if (openconnect_sha1(sha1, xmlfile, size)) {
fprintf(stderr, _("Failed to SHA1 existing file\n"));
free(xmlfile);
return -1;
}
for (i = 0; i < SHA1_SIZE; i++)
snprintf(&vpninfo->xmlsha1[i*2], 3, "%02x", sha1[i]);
vpn_progress(vpninfo, PRG_DEBUG, _("XML config file SHA1: %s\n"),
vpninfo->xmlsha1);
xml_doc = xmlReadMemory(xmlfile, size, "noname.xml", NULL, 0);
free(xmlfile);
if (!xml_doc) {
fprintf(stderr, _("Failed to parse XML config file %s\n"),
vpninfo->xmlconfig);
fprintf(stderr, _("Treating host \"%s\" as a raw hostname\n"),
host);
return 0;
}
xml_node = xmlDocGetRootElement(xml_doc);
for (xml_node = xml_node->children; xml_node; xml_node = xml_node->next) {
if (xml_node->type == XML_ELEMENT_NODE &&
!strcmp((char *)xml_node->name, "ServerList")) {
for (xml_node = xml_node->children; xml_node && !vpninfo->hostname;
xml_node = xml_node->next) {
if (xml_node->type == XML_ELEMENT_NODE &&
!strcmp((char *)xml_node->name, "HostEntry")) {
int match = 0;
for (xml_node2 = xml_node->children;
match >= 0 && xml_node2; xml_node2 = xml_node2->next) {
if (xml_node2->type != XML_ELEMENT_NODE)
continue;
if (!match && !strcmp((char *)xml_node2->name, "HostName")) {
char *content = fetch_and_trim(xml_node2);
if (content && !strcmp(content, host))
match = 1;
else
match = -1;
free(content);
} else if (match &&
!strcmp((char *)xml_node2->name, "HostAddress")) {
char *content = fetch_and_trim(xml_node2);
if (content &&
!openconnect_parse_url(vpninfo, content)) {
printf(_("Host \"%s\" has address \"%s\"\n"),
host, content);
}
free(content);
} else if (match &&
!strcmp((char *)xml_node2->name, "UserGroup")) {
char *content = fetch_and_trim(xml_node2);
if (content) {
free(vpninfo->urlpath);
vpninfo->urlpath = content;
printf(_("Host \"%s\" has UserGroup \"%s\"\n"),
host, content);
}
}
}
}
}
break;
}
}
xmlFreeDoc(xml_doc);
if (!vpninfo->hostname) {
fprintf(stderr, _("Host \"%s\" not listed in config; treating as raw hostname\n"),
host);
}
return 0;
}
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