first commit, SM2-DSA only

engines/ccgost/gost2001_keyx.h

@@ -0,0 +1,10 @@
+GOST_KEY_TRANSPORT *
+make_rfc4490_keytransport_2001(EVP_PKEY *pubk, BIGNUM *eph_key,
+                               const unsigned char *key, size_t keylen,
+                               unsigned char *ukm, size_t ukm_len);
+
+int decrypt_rfc4490_shared_key_2001(EVP_PKEY *priv,
+                                    GOST_KEY_TRANSPORT *gkt,
+                                    unsigned char *key_buf,
+                                    int key_buf_len) ;
+