--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_init.c	Fri Feb 09 21:44:05 2018 +0800
@@ -0,0 +1,30 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+#include "tomcrypt.h"
+
+#ifdef LTC_CHACHA20POLY1305_MODE
+
+/**
+   Initialize an ChaCha20Poly1305 context (only the key)
+   @param st        [out] The destination of the ChaCha20Poly1305 state
+   @param key       The secret key
+   @param keylen    The length of the secret key (octets)
+   @return CRYPT_OK if successful
+*/
+int chacha20poly1305_init(chacha20poly1305_state *st, const unsigned char *key, unsigned long keylen)
+{
+   return chacha_setup(&st->chacha, key, keylen, 20);
+}
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */