1 files changed, 67 insertions, 0 deletions
diff --git a/libtomcrypt/src/mac/poly1305/poly1305_memory_multi.c b/libtomcrypt/src/mac/poly1305/poly1305_memory_multi.c
new file mode 100644
index 0000000..f22f255
--- /dev/null
+++ b/libtomcrypt/src/mac/poly1305/poly1305_memory_multi.c
@@ -0,0 +1,67 @@
+/* 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.
+ */
+
+/* The implementation is based on:
+ * Public Domain poly1305 from Andrew Moon
+ * https://github.com/floodyberry/poly1305-donna
+ */
+
+#include "tomcrypt.h"
+#include <stdarg.h>
+
+#ifdef LTC_POLY1305
+
+/**
+   POLY1305 multiple blocks of memory to produce the authentication tag
+   @param key       The secret key
+   @param keylen    The length of the secret key (octets)
+   @param mac       [out] Destination of the authentication tag
+   @param maclen    [in/out] Max size and resulting size of authentication tag
+   @param in        The data to POLY1305
+   @param inlen     The length of the data to POLY1305 (octets)
+   @param ...       tuples of (data,len) pairs to POLY1305, terminated with a (NULL,x) (x=don't care)
+   @return CRYPT_OK if successful
+*/
+int poly1305_memory_multi(const unsigned char *key, unsigned long keylen, unsigned char *mac, unsigned long *maclen, const unsigned char *in,  unsigned long inlen, ...)
+{
+   poly1305_state st;
+   int err;
+   va_list args;
+   const unsigned char *curptr;
+   unsigned long curlen;
+
+   LTC_ARGCHK(key    != NULL);
+   LTC_ARGCHK(in     != NULL);
+   LTC_ARGCHK(mac    != NULL);
+   LTC_ARGCHK(maclen != NULL);
+
+   va_start(args, inlen);
+   curptr = in;
+   curlen = inlen;
+   if ((err = poly1305_init(&st, key, keylen)) != CRYPT_OK)          { goto LBL_ERR; }
+   for (;;) {
+      if ((err = poly1305_process(&st, curptr, curlen)) != CRYPT_OK) { goto LBL_ERR; }
+      curptr = va_arg(args, const unsigned char*);
+      if (curptr == NULL) break;
+      curlen = va_arg(args, unsigned long);
+   }
+   err = poly1305_done(&st, mac, maclen);
+LBL_ERR:
+#ifdef LTC_CLEAN_STACK
+   zeromem(&st, sizeof(poly1305_state));
+#endif
+   va_end(args);
+   return err;
+}
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */