cli_putstr_P(PSTR("\r\nencrypting: ..."));
rc = rsa_encrypt_oaep(ciphertext, &clen, plaintext, sizeof(MSG), &pub_key, NULL, NULL, seed);
if(rc){
cli_putstr_P(PSTR("\r\nencrypting: ..."));
rc = rsa_encrypt_oaep(ciphertext, &clen, plaintext, sizeof(MSG), &pub_key, NULL, NULL, seed);
if(rc){