--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/mac/blake2/blake2smac_memory.c	Fri Feb 09 23:49:22 2018 +0800
@@ -0,0 +1,48 @@
+/* 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
+
+/**
+   BLAKE2S MAC a block of memory to produce the authentication tag
+   @param key       The secret key
+   @param keylen    The length of the secret key (octets)
+   @param in        The data to BLAKE2S MAC
+   @param inlen     The length of the data to BLAKE2S MAC (octets)
+   @param mac       [out] Destination of the authentication tag
+   @param maclen    [in/out] Max size and resulting size of authentication tag
+   @return CRYPT_OK if successful
+*/
+int blake2smac_memory(const unsigned char *key, unsigned long keylen, const unsigned char *in, unsigned long inlen, unsigned char *mac, unsigned long *maclen)
+{
+   blake2smac_state st;
+   int err;
+
+   LTC_ARGCHK(key    != NULL);
+   LTC_ARGCHK(in     != NULL);
+   LTC_ARGCHK(mac    != NULL);
+   LTC_ARGCHK(maclen != NULL);
+
+   if ((err = blake2smac_init(&st, *maclen, key, keylen))  != CRYPT_OK) { goto LBL_ERR; }
+   if ((err = blake2smac_process(&st, in, inlen)) != CRYPT_OK) { goto LBL_ERR; }
+   err = blake2smac_done(&st, mac, maclen);
+LBL_ERR:
+#ifdef LTC_CLEAN_STACK
+   zeromem(&st, sizeof(blake2smac_state));
+#endif
+   return err;
+}
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */