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Add support for HMAC-SHA-256 as an SSH-2 MAC algorithm ("hmac-sha2-256")

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as specified in RFC 6668.  This is not so much because I think it's 
necessary, but because scrypt uses HMAC-SHA-256 and once we've got it we 
may as well use it.

Code very closely derived from the HMAC-SHA-1 code.

Tested against OpenSSH 5.9p1 Debian-5ubuntu1.

[originally from svn r9759]
This commit is contained in:
Ben Harris
2013-02-20 23:30:55 +00:00
parent 3045a9ac8c
commit 8f3cc4a9bf
3 changed files with 112 additions and 1 deletions
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2
ssh.c
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@ -525,7 +525,7 @@ static void ssh_channel_destroy(struct ssh_channel *c);
const static struct ssh_signkey *hostkey_algs[] = { &ssh_rsa, &ssh_dss };
const static struct ssh_mac *macs[] = {
&ssh_hmac_sha1, &ssh_hmac_sha1_96, &ssh_hmac_md5
&ssh_hmac_sha256, &ssh_hmac_sha1, &ssh_hmac_sha1_96, &ssh_hmac_md5
};
const static struct ssh_mac *buggymacs[] = {
&ssh_hmac_sha1_buggy, &ssh_hmac_sha1_96_buggy, &ssh_hmac_md5