+#ifdef EVP_MD_CTRL_TLSTREE
+ case EVP_MD_CTRL_TLSTREE:
+ {
+ OMAC_CTX *c = EVP_MD_CTX_md_data(ctx);
+ if (c->key_set) {
+ unsigned char diversed_key[32];
+ return gost_tlstree(c->cipher_nid, c->key, diversed_key,
+ (const unsigned char *)ptr) ?
+ omac_key(c, EVP_get_cipherbynid(c->cipher_nid),
+ diversed_key, 32) : 0;
+ }
+ GOSTerr(GOST_F_OMAC_IMIT_CTRL, GOST_R_BAD_ORDER);
+ return 0;
+ }
+ return 0;
+#endif