[PATCH v2 2/7] nest: Add Blake2s and Blake2b hash functions

[Toke Høiland-Jørgensen]

Toke Høiland-Jørgensen <toke at toke.dk> writes:

> @@ -169,6 +170,12 @@ const struct mac_desc mac_table[ALG_MAX] = {
>    [ALG_SHA256] = 	HASH_DESC("Keyed SHA-256",	sha256,	SHA256),
>    [ALG_SHA384] = 	HASH_DESC("Keyed SHA-384",	sha384,	SHA384),
>    [ALG_SHA512] = 	HASH_DESC("Keyed SHA-512",	sha512,	SHA512),
> +  [ALG_BLAKE2S] = 	{"Blake2s", BLAKE2S_SIZE, sizeof(struct blake2s_context),
> +                         blake2s_bird_init, blake2s_bird_update,
> +                         blake2s_bird_final, BLAKE2S_SIZE, BLAKE2S_BLOCK_SIZE},
> +  [ALG_BLAKE2B] = 	{"Blake2b", BLAKE2B_SIZE, sizeof(struct blake2b_context),
> +                         blake2b_bird_init, blake2b_bird_update,
> +                         blake2b_bird_final, BLAKE2B_SIZE, BLAKE2B_BLOCK_SIZE},

Note that there's an ongoing discussion on the babel at ietf list about
whether the output size of Blake2s ought to be truncated to 128 bits.

See:
https://mailarchive.ietf.org/arch/msg/babel/9EIUxXvaGj-Zm9uktF0v1Zavb-g/

If anyone here has an opinion on this, please weigh in on that list;
otherwise I plan to respin this series with an option to have both
128-bit and 256-bit outputs from Blake2s.

-Toke