Import code from previous AssetBuilder version

thirdparty/libtomcrypt/pk/rsa/rsa_free.c

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+/* 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 rsa_free.c
+  Free an RSA key, Tom St Denis
+*/
+
+#ifdef LTC_MRSA
+
+/**
+  Free an RSA key from memory
+  @param key   The RSA key to free
+*/
+void rsa_free(rsa_key *key)
+{
+   LTC_ARGCHKVD(key != NULL);
+   mp_cleanup_multi(&key->q, &key->p, &key->qP, &key->dP, &key->dQ, &key->N, &key->d, &key->e, NULL);
+}
+
+#endif
+
+/* ref:         HEAD -> master, tag: v1.18.2 */
+/* git commit:  7e7eb695d581782f04b24dc444cbfde86af59853 */
+/* commit time: 2018-07-01 22:49:01 +0200 */