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-rw-r--r--src/common/aes.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/common/aes.c b/src/common/aes.c
index 1f7195cbc2..5079006399 100644
--- a/src/common/aes.c
+++ b/src/common/aes.c
@@ -6,8 +6,11 @@ const char aes_c_id[] = "$Id$";
/**
* \file aes.c
- *
- * \brief Implementation of a simple AES counter mode.
+ * \brief Implements the AES cipher (with 128-bit keys and blocks),
+ * and a counter-mode stream cipher on top of AES. This code is
+ * taken from the main Rijndael distribution. (We include this
+ * because many people are running older versions of OpenSSL without
+ * AES support.)
**/
#include "orconfig.h"