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/*
* active port forwarder - software for secure forwarding
* Copyright (C) 2003-2007 jeremian <jeremian [at] poczta.fm>
*
* 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 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "ssl_routines.h"
/*
* Function name: check_public_key
* Description: Checks if the public key is trusted.
* Arguments: filename - the name of the file with stored keys
* hostname - the name of the host
* keyhash - the hash of the key
* Returns: The result of the check.
*/
int
check_public_key(char* filename, char* hostname, char* keyhash)
{
FILE* storefile;
char buff[256];
int lspaceind, i;
assert(filename != NULL);
assert(hostname != NULL);
assert(keyhash != NULL);
memset(buff, 0, 256);
storefile = fopen(filename, "r");
if (storefile == NULL) {
return SSL_PUBLIC_KEY_NOT_KNOWN;
}
while (fgets(buff, 256, storefile) != NULL) {
lspaceind = -1;
for (i = 0; i < 256; ++i) {
if (buff[i] == 0) {
break;
}
if (buff[i] == ' ') {
lspaceind = i;
}
}
if (lspaceind == -1) {
continue;
}
if (buff[strlen(buff)-1] == '\n') {
buff[strlen(buff)-1] = 0;
}
buff[lspaceind] = 0;
if (strcmp(buff, hostname) == 0) {
if (strcmp(&buff[lspaceind+1], keyhash) == 0) {
return SSL_PUBLIC_KEY_VALID;
}
else {
return SSL_PUBLIC_KEY_INVALID;
}
}
}
return SSL_PUBLIC_KEY_NOT_KNOWN;
}
/*
* Function name: add_public_key
* Description: Adds the key to the store file.
* Arguments: filename - the name of the file with stored keys
* hostname - the name of the host
* keyhash - the hash of the key
*/
void
add_public_key(char* filename, char* hostname, char* keyhash)
{
FILE* storefile;
assert(filename != NULL);
assert(hostname != NULL);
assert(keyhash != NULL);
storefile = fopen(filename, "a");
if (storefile == NULL) {
return;
}
fprintf(storefile, "%s %s\n", hostname, keyhash);
fclose(storefile);
}
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