# Re: \[PATCH iproute2-next v2\] lib/bpf\_legacy: Use userspace SHA-1 code instead of AF\_ALG

- From: Stephen Hemminger \<stephen@networkplumber.org\>
- Date: 2025-11-12 20:12:16 
- List: netdev
- Page: https://ratatoskr.run/netdev/2025/11/7939753
- Thread: https://ratatoskr.run/netdev/2025/09/7933413/t.md

```text
On Mon, 29 Sep 2025 12:46:48 -0700
Eric Biggers [ref] wrote:

> diff --git a/lib/sha1.c b/lib/sha1.c
> new file mode 100644
> index 00000000..1aa8fd83
> --- /dev/null
> +++ b/lib/sha1.c
> @@ -0,0 +1,108 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * SHA-1 message digest algorithm
> + *
> + * Copyright 2025 Google LLC
> + */

Not a big fan of having actual crypto in iproute2.
It creates even more technical debt.
Is there another crypto library that could be used?


Better yet, is there a reason legacy BPF code needs to still exist
in current iproute2? When was the cut over.
```