Fixed silc_parse_userfqdn argument check

[silc.git] / lib / silcutil / silcutil.c

diff --git a/lib/silcutil/silcutil.c b/lib/silcutil/silcutil.c
index ebec35a77cc2c840d5f84c728691d6fd97f36e1a..daea86c3dfe2e7a769c0d9a0fb4ed62741733ea0 100644 (file)
--- a/lib/silcutil/silcutil.c
+++ b/lib/silcutil/silcutil.c
@@ -4,7 +4,7 @@
 
   Author: Pekka Riikonen <priikone@silcnet.org>
 
-  Copyright (C) 1997 - 2006 Pekka Riikonen
+  Copyright (C) 1997 - 2007 Pekka Riikonen
 
   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
@@ -88,7 +88,7 @@ SilcBool silc_to_upper(const char *string, char *dest, SilcUInt32 dest_size)
     return FALSE;
 
   for (i = 0; i < strlen(string); i++)
-    dest[i] = toupper(string[i]);
+    dest[i] = (char)toupper((int)string[i]);
 
   return TRUE;
 }
@@ -103,7 +103,7 @@ SilcBool silc_to_lower(const char *string, char *dest, SilcUInt32 dest_size)
     return FALSE;
 
   for (i = 0; i < strlen(string); i++)
-    dest[i] = tolower(string[i]);
+    dest[i] = (char)tolower((int)string[i]);
 
   return TRUE;
 }
@@ -116,7 +116,7 @@ int silc_parse_userfqdn(const char *string,
 {
   SilcUInt32 tlen;
 
-  if (!user && !fqdn)
+  if (!user || !fqdn)
     return 0;
 
   memset(user, 0, user_size);
@@ -236,7 +236,7 @@ char *silc_format(char *fmt, ...)
 
   memset(buf, 0, sizeof(buf));
   va_start(args, fmt);
-  vsnprintf(buf, sizeof(buf) - 1, fmt, args);
+  silc_vsnprintf(buf, sizeof(buf) - 1, fmt, args);
   va_end(args);
 
   return strdup(buf);
@@ -253,7 +253,7 @@ SilcUInt32 silc_hash_string(void *key, void *user_context)
   SilcUInt32 h = 0, g;
 
   while (*s != '\0') {
-    h = (h << 4) + tolower(*s);
+    h = (h << 4) + tolower((int)*s);
     if ((g = h & 0xf0000000)) {
       h = h ^ (g >> 24);
       h = h ^ g;
@@ -467,28 +467,41 @@ SilcBool silc_hash_public_key_compare(void *key1, void *key2,
 
 char *silc_fingerprint(const unsigned char *data, SilcUInt32 data_len)
 {
-  char fingerprint[64], *cp;
-  int i;
+  unsigned char *fingerprint, *cp;
+  unsigned int len, blocks, i;
+
+  if (!data || !data_len)
+    return NULL;
+
+  if (data_len >= 256)
+    data_len = 255;
+
+  /* Align and calculate total length */
+  len = ((data_len + 19) / 20) * 20;
+  blocks = (len / 10);
+  len = (len * 2) + ((blocks - 1) * 2) + (4 * blocks) + 2 + 1;
+
+  cp = fingerprint = silc_calloc(len, sizeof(*fingerprint));
+  if (!cp)
+    return NULL;
 
-  memset(fingerprint, 0, sizeof(fingerprint));
-  cp = fingerprint;
   for (i = 0; i < data_len; i++) {
-    snprintf(cp, sizeof(fingerprint), "%02X", data[i]);
+    silc_snprintf(cp, len, "%02X", data[i]);
     cp += 2;
+    len -= 2;
 
     if ((i + 1) % 2 == 0)
-      snprintf(cp++, sizeof(fingerprint), " ");
-
+      silc_snprintf(cp++, len--, " ");
     if ((i + 1) % 10 == 0)
-      snprintf(cp++, sizeof(fingerprint), " ");
+      silc_snprintf(cp++, len--, " ");
   }
   i--;
-  if ((i + 1) % 2 == 0)
-    cp[-2] = 0;
   if ((i + 1) % 10 == 0)
-    cp[-1] = 0;
+    *(--cp) = '\0';
+  if ((i + 1) % 2 == 0)
+    *(--cp) = '\0';
 
-  return strdup(fingerprint);
+  return fingerprint;
 }
 
 /* Return TRUE if the `data' is ASCII string. */