|| EVP_DigestUpdate(ctx, context, contextlen) <= 0
|| EVP_DigestFinal_ex(ctx, hash, &hashsize) <= 0
|| !tls13_hkdf_expand(s, md, s->exporter_master_secret,
|| EVP_DigestUpdate(ctx, context, contextlen) <= 0
|| EVP_DigestFinal_ex(ctx, hash, &hashsize) <= 0
|| !tls13_hkdf_expand(s, md, s->exporter_master_secret,