--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/math/radix_to_bin.c	Fri Feb 09 21:44:05 2018 +0800
@@ -0,0 +1,62 @@
+/* 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"
+
+/**
+   @file radix_to_bin.c
+   Convert data from a specific radix to binary.
+   Steffen Jaeckel
+*/
+
+/**
+   Convert data from a specific radix to binary
+
+      The default MPI descriptors #ltm_desc, #tfm_desc and #gmp_desc
+      have the following restrictions on parameters:
+
+        \p in    - NUL-terminated char buffer
+
+        \p radix - 2..64
+
+   @param in    The input
+   @param radix The radix of the input
+   @param out   The output buffer
+   @param len   [in/out] The length of the output buffer
+
+   @return CRYPT_OK on success.
+*/
+int radix_to_bin(const void *in, int radix, void *out, unsigned long *len)
+{
+   unsigned long l;
+   void* mpi;
+   int err;
+
+   LTC_ARGCHK(in  != NULL);
+   LTC_ARGCHK(len != NULL);
+
+   if ((err = mp_init(&mpi)) != CRYPT_OK) return err;
+   if ((err = mp_read_radix(mpi, in, radix)) != CRYPT_OK) goto LBL_ERR;
+
+   if ((l = mp_unsigned_bin_size(mpi)) > *len) {
+      *len = l;
+      err = CRYPT_BUFFER_OVERFLOW;
+      goto LBL_ERR;
+   }
+   *len = l;
+
+   if ((err = mp_to_unsigned_bin(mpi, out)) != CRYPT_OK) goto LBL_ERR;
+
+LBL_ERR:
+   mp_clear(mpi);
+   return err;
+}
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */