From 46f96ed5e3127394a0cd4dcb961404b792f743b4 Mon Sep 17 00:00:00 2001
From: Jakub Slawinski
Date: Thu, 10 Jul 2014 10:24:59 +0200
Subject: Initial project structure based on Active Port Forwarder 0.8.4.

---
 src/ssl_routines.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 src/ssl_routines.c

(limited to 'src/ssl_routines.c')

diff --git a/src/ssl_routines.c b/src/ssl_routines.c
new file mode 100644
index 0000000..7275e92
--- /dev/null
+++ b/src/ssl_routines.c
@@ -0,0 +1,108 @@
+/*
+ * 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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