--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/mac/blake2/blake2smac.c	Fri Feb 09 21:44:05 2018 +0800
@@ -0,0 +1,66 @@
+/* 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_BLAKE2SMAC
+
+/**
+   Initialize an BLAKE2S MAC context.
+   @param st       The BLAKE2S MAC state
+   @param outlen   The size of the MAC output (octets)
+   @param key      The secret key
+   @param keylen   The length of the secret key (octets)
+   @return CRYPT_OK if successful
+*/
+int blake2smac_init(blake2smac_state *st, unsigned long outlen, const unsigned char *key, unsigned long keylen)
+{
+   LTC_ARGCHK(st  != NULL);
+   LTC_ARGCHK(key != NULL);
+   return blake2s_init(st, outlen, key, keylen);
+}
+
+/**
+  Process data through BLAKE2S MAC
+  @param st      The BLAKE2S MAC state
+  @param in      The data to send through HMAC
+  @param inlen   The length of the data to HMAC (octets)
+  @return CRYPT_OK if successful
+*/
+int blake2smac_process(blake2smac_state *st, const unsigned char *in, unsigned long inlen)
+{
+   if (inlen == 0) return CRYPT_OK; /* nothing to do */
+   LTC_ARGCHK(st != NULL);
+   LTC_ARGCHK(in != NULL);
+   return blake2s_process(st, in, inlen);
+}
+
+/**
+   Terminate a BLAKE2S MAC session
+   @param st      The BLAKE2S MAC state
+   @param mac     [out] The destination of the BLAKE2S MAC authentication tag
+   @param maclen  [in/out]  The max size and resulting size of the BLAKE2S MAC authentication tag
+   @return CRYPT_OK if successful
+*/
+int blake2smac_done(blake2smac_state *st, unsigned char *mac, unsigned long *maclen)
+{
+   LTC_ARGCHK(st     != NULL);
+   LTC_ARGCHK(mac    != NULL);
+   LTC_ARGCHK(maclen != NULL);
+   LTC_ARGCHK(*maclen >= st->blake2s.outlen);
+
+   *maclen = st->blake2s.outlen;
+   return blake2s_done(st, mac);
+}
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */