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Add support for HMAC-SHA512.

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I saw a post on comp.security.ssh just now where someone had
encountered an SSH server that would _only_ speak that, which makes it
worth bothering to implement.

The totally obvious implementation works, and passes the test cases
from RFC 6234.

(cherry picked from commit b77e985513)
This commit is contained in:
Simon Tatham
2023-04-21 20:17:43 +01:00
parent c545c04102
commit f6f9848465
6 changed files with 44 additions and 8 deletions
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16
crypto/hmac.c
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@ -160,6 +160,22 @@ static const char *hmac_text_name(ssh2_mac *mac)
return ctx->text_name->s;
}
static const struct hmac_extra ssh_hmac_sha512_extra = { &ssh_sha512, "" };
const ssh2_macalg ssh_hmac_sha512 = {
.new = hmac_new,
.free = hmac_free,
.setkey = hmac_key,
.start = hmac_start,
.genresult = hmac_genresult,
.next_message = nullmac_next_message,
.text_name = hmac_text_name,
.name = "hmac-sha2-512",
.etm_name = "hmac-sha2-512-etm@openssh.com",
.len = 64,
.keylen = 64,
.extra = &ssh_hmac_sha512_extra,
};
static const struct hmac_extra ssh_hmac_sha256_extra = { &ssh_sha256, "" };
const ssh2_macalg ssh_hmac_sha256 = {
.new = hmac_new,