--- /dev/null
+/* 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_MDH
+
+/**
+ Binary export a DH key to a buffer
+ @param out [out] The destination for the key
+ @param outlen [in/out] The max size and resulting size of the DH key
+ @param type Which type of key (PK_PRIVATE or PK_PUBLIC)
+ @param key The key you wish to export
+ @return CRYPT_OK if successful
+*/
+int dh_export_key(void *out, unsigned long *outlen, int type, dh_key *key)
+{
+ unsigned long len;
+ void *k;
+
+ LTC_ARGCHK(out != NULL);
+ LTC_ARGCHK(outlen != NULL);
+ LTC_ARGCHK(key != NULL);
+
+ k = (type == PK_PRIVATE) ? key->x : key->y;
+ len = mp_unsigned_bin_size(k);
+
+ if (*outlen < len) {
+ *outlen = len;
+ return CRYPT_BUFFER_OVERFLOW;
+ }
+ *outlen = len;
+
+ return mp_to_unsigned_bin(k, out);
+}
+
+#endif /* LTC_MDH */
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */