|| !EVP_MD_meth_set_input_blocksize(md, 8)
|| !EVP_MD_meth_set_app_datasize(md, sizeof(OMAC_CTX))
|| !EVP_MD_meth_set_flags(md, 0)
|| !EVP_MD_meth_set_input_blocksize(md, 8)
|| !EVP_MD_meth_set_app_datasize(md, sizeof(OMAC_CTX))
|| !EVP_MD_meth_set_flags(md, 0)