Improve free functions of the keyfiles.

git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@389 7dcaeef0-15fb-0310-b436-a5af3365683c

libssh/keyfiles.c

@@ -660,23 +660,20 @@ PRIVATE_KEY  *_privatekey_from_file(void *session,char *filename,int type){
 /** \brief deallocate a private key
  * \param prv a PRIVATE_KEY object
  */
-void private_key_free(PRIVATE_KEY *prv){
+void private_key_free(PRIVATE_KEY *prv) {
   if (prv == NULL) {
     return;
   }
+
 #ifdef HAVE_LIBGCRYPT
-    if(prv->dsa_priv)
-        gcry_sexp_release(prv->dsa_priv);
-    if(prv->rsa_priv)
-        gcry_sexp_release(prv->rsa_priv);
+  gcry_sexp_release(prv->dsa_priv);
+  gcry_sexp_release(prv->rsa_priv);
 #elif defined HAVE_LIBCRYPTO
-    if(prv->dsa_priv)
-        DSA_free(prv->dsa_priv);
-    if(prv->rsa_priv)
-        RSA_free(prv->rsa_priv);
+  DSA_free(prv->dsa_priv);
+  RSA_free(prv->rsa_priv);
 #endif
-    memset(prv,0,sizeof(PRIVATE_KEY));
-    free(prv);
+  memset(prv, 0, sizeof(PRIVATE_KEY));
+  SAFE_FREE(prv);
 }
 
 /** \brief Retrieve a public key from a file
@@ -825,12 +822,16 @@ static char *lowercase(const char* str) {
 /** \brief frees a token array
  * \internal
  */
-static void tokens_free(char **tokens){
-	free(tokens[0]);
-	/* It's not needed to free other pointers because tokens generated by
-	 * space_tokenize fit all in one malloc
-	 */
-	free(tokens);
+static void tokens_free(char **tokens) {
+  if (tokens == NULL) {
+    return;
+  }
+
+  SAFE_FREE(tokens[0]);
+  /* It's not needed to free other pointers because tokens generated by
+   * space_tokenize fit all in one malloc
+   */
+  SAFE_FREE(tokens);
 }
 /** \brief returns one line of known host file
  * will return a token array containing (host|ip) keytype key