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librpc/dns: remove original_id from dns_fake_tsig_rec

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Cf RFC2845, 3.4.2. "TSIG Variables", the request id (original_id) is not
used in the MAC calculation. This also explains the mysterious 2 bytes
padding.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=11520

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
(cherry picked from commit bea4aec521576576b8dc55065f11c6c5025d9c4f)
This commit is contained in:
Ralph Boehme 2016-05-14 19:08:51 +02:00 committed by Karolin Seeger
parent 33a6532252
commit d2ab8d34e2
2 changed files with 0 additions and 4 deletions
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1
librpc/idl/dns.idl
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@ -212,7 +212,6 @@ interface dns
uint16 time_prefix; /* 0 until February 2106*/
uint32 time;
uint16 fudge;
uint16 original_id;
uint16 error;
uint16 other_size;
uint8 other_data[other_size];

3
source4/dns_server/dns_crypto.c
View File

@ -207,9 +207,6 @@ WERROR dns_verify_tsig(struct dns_server *dns,
return WERR_NOMEM;
}
/*FIXME: Why is there too much padding? */
buffer_len -= 2;
/* Now we also need to count down the additional record counter */
arcount = RSVAL(buffer, 10);
RSSVAL(buffer, 10, arcount-1);