1 files changed, 23 insertions, 0 deletions
diff --git a/src/common/aes.h b/src/common/aes.h
new file mode 100644
index 0000000000..0b43619bc0
--- /dev/null
+++ b/src/common/aes.h
@@ -0,0 +1,23 @@
+/* Copyright 2003 Roger Dingledine */
+/* See LICENSE for licensing information */
+/* $Id$ */
+
+/* Implements a minimal interface to counter-mode AES. */
+
+#ifndef __AES_H
+#define __AES_H
+
+#include <stdint.h>
+
+struct aes_cnt_cipher;
+typedef struct aes_cnt_cipher aes_cnt_cipher_t;
+
+aes_cnt_cipher_t* aes_new_cipher();
+void aes_free_cipher(aes_cnt_cipher_t *cipher);
+void aes_set_key(aes_cnt_cipher_t *cipher, unsigned char *key, int key_bits);
+void aes_crypt(aes_cnt_cipher_t *cipher, char *input, int len, char *output);
+uint64_t aes_get_counter(aes_cnt_cipher_t *cipher);
+void aes_set_counter(aes_cnt_cipher_t *cipher, uint64_t counter);
+void aes_adjust_counter(aes_cnt_cipher_t *cipher, long delta);
+
+#endif