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Mark Andrews
2002-12-05 21:38:28 +00:00
parent 37f8b38d7a
commit c3e0381189
1 changed files with 85 additions and 83 deletions
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doc/draft/draft-ietf-dnsext-delegation-signer-11.txt → doc/draft/draft-ietf-dnsext-delegation-signer-12.txt
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@@ -4,9 +4,10 @@
DNSEXT Working Group Olafur Gudmundsson DNSEXT Working Group Olafur Gudmundsson
INTERNET-DRAFT October 2002 INTERNET-DRAFT December 2002
<draft-ietf-dnsext-delegation-signer-11.txt> <draft-ietf-dnsext-delegation-signer-12.txt>
Updates: RFC 1035, RFC 2535, RFC 3008, RFC 3090. Updates: RFC 1035, RFC 2535, RFC 3008, RFC 3090.
@@ -38,7 +39,7 @@ Status of this Memo
Comments should be sent to the authors or the DNSEXT WG mailing list Comments should be sent to the authors or the DNSEXT WG mailing list
namedroppers@ops.ietf.org namedroppers@ops.ietf.org
This draft expires on April 30, 2003. This draft expires on June 4, 2003.
Copyright Notice Copyright Notice
@@ -56,9 +57,9 @@ Abstract
Gudmundsson Expires April 2003 [Page 1] Gudmundsson Expires June 2003 [Page 1]
INTERNET-DRAFT Delegation Signer Record October 2002 INTERNET-DRAFT Delegation Signer Record December 2002
operational considerations. The intent is to use this resource record operational considerations. The intent is to use this resource record
@@ -113,9 +114,9 @@ INTERNET-DRAFT Delegation Signer Record October 2002
Gudmundsson Expires April 2003 [Page 2] Gudmundsson Expires June 2003 [Page 2]
INTERNET-DRAFT Delegation Signer Record October 2002 INTERNET-DRAFT Delegation Signer Record December 2002
Another complication of the DNSSEC key model is that the KEY record Another complication of the DNSSEC key model is that the KEY record
@@ -170,9 +171,9 @@ INTERNET-DRAFT Delegation Signer Record October 2002
Gudmundsson Expires April 2003 [Page 3] Gudmundsson Expires June 2003 [Page 3]
INTERNET-DRAFT Delegation Signer Record October 2002 INTERNET-DRAFT Delegation Signer Record December 2002
to sign only its apex KEY RRset and other keys to sign the other to sign only its apex KEY RRset and other keys to sign the other
@@ -227,9 +228,9 @@ INTERNET-DRAFT Delegation Signer Record October 2002
Gudmundsson Expires April 2003 [Page 4] Gudmundsson Expires June 2003 [Page 4]
INTERNET-DRAFT Delegation Signer Record October 2002 INTERNET-DRAFT Delegation Signer Record December 2002
unsecure (from the parents point of view). DS RRsets MUST NOT appear unsecure (from the parents point of view). DS RRsets MUST NOT appear
@@ -284,9 +285,9 @@ INTERNET-DRAFT Delegation Signer Record October 2002
Gudmundsson Expires April 2003 [Page 5] Gudmundsson Expires June 2003 [Page 5]
INTERNET-DRAFT Delegation Signer Record October 2002 INTERNET-DRAFT Delegation Signer Record December 2002
When the server is authoritative for the child zone at a delegation When the server is authoritative for the child zone at a delegation
@@ -311,6 +312,25 @@ INTERNET-DRAFT Delegation Signer Record October 2002
MUST not be set in the response. MUST not be set in the response.
2.2.1.2 Special processing when child and an ancestor share server
When a child zone and a ancestor other than parent share an
authorative server, a DS aware server MUST answer with information
from child zone, as specified in section 2.2.1.1. This is to prevent
the server to be marked as lame for child.
This answer can cause problem for a DS aware resolver that is
traversing this branch of the DNS tree for the first time. The
resolver is expecting to get back either DS record or a delegation
information. The SOA with same name as QNAME informs the resolver
that the answer orignated from the zone below the one where the DS
resides. At this point the resolver has no information on how to get
from the ancestor to the parent. In this case the resolver SHOULD
attempt to fetch the delegation information by issuing a query with a
QNAME one label shorter and type NS. This will yield the NS set for
the parent, allowing the resolver to query for the DS record.
2.2.2 Signer's Name (replaces RFC3008 section 2.7) 2.2.2 Signer's Name (replaces RFC3008 section 2.7)
The signer's name field of a SIG RR MUST contain the name of the zone The signer's name field of a SIG RR MUST contain the name of the zone
@@ -319,6 +339,14 @@ INTERNET-DRAFT Delegation Signer Record October 2002
to be considered material. This document defines a standard policy to be considered material. This document defines a standard policy
for DNSSEC validation; local policy may override the standard policy. for DNSSEC validation; local policy may override the standard policy.
Gudmundsson Expires June 2003 [Page 6]
INTERNET-DRAFT Delegation Signer Record December 2002
There are no restrictions on the signer field of a SIG(0) record. There are no restrictions on the signer field of a SIG(0) record.
The combination of signer's name, key tag, and algorithm MUST The combination of signer's name, key tag, and algorithm MUST
identify a key if this SIG(0) is to be processed. identify a key if this SIG(0) is to be processed.
@@ -339,13 +367,6 @@ INTERNET-DRAFT Delegation Signer Record October 2002
obsolete. obsolete.
Gudmundsson Expires April 2003 [Page 6]
INTERNET-DRAFT Delegation Signer Record October 2002
2.2.3.2 RFC3090 section 2.1: Globally Secured 2.2.3.2 RFC3090 section 2.1: Globally Secured
Rule 2.1.b is replaced by the following rule: Rule 2.1.b is replaced by the following rule:
@@ -376,6 +397,13 @@ INTERNET-DRAFT Delegation Signer Record October 2002
a delegation at this name. Something more explicit is needed and the a delegation at this name. Something more explicit is needed and the
DS record addresses this need for secure delegations. DS record addresses this need for secure delegations.
Gudmundsson Expires June 2003 [Page 7]
INTERNET-DRAFT Delegation Signer Record December 2002
The DS record is a major change to DNS: it is the first resource The DS record is a major change to DNS: it is the first resource
record that can appear only on the upper side of a delegation. Adding record that can appear only on the upper side of a delegation. Adding
it will cause interoperabilty problems and requires a flag day for it will cause interoperabilty problems and requires a flag day for
@@ -385,24 +413,6 @@ INTERNET-DRAFT Delegation Signer Record October 2002
the authority section. The same is true for caching servers; in the authority section. The same is true for caching servers; in
fact, some may even refuse to pass on the DS or NXT records. fact, some may even refuse to pass on the DS or NXT records.
Gudmundsson Expires April 2003 [Page 7]
INTERNET-DRAFT Delegation Signer Record October 2002
2.4 Wire Format of the DS record 2.4 Wire Format of the DS record
The DS (type=TDB) record contains these fields: key tag, algorithm, The DS (type=TDB) record contains these fields: key tag, algorithm,
@@ -442,6 +452,15 @@ INTERNET-DRAFT Delegation Signer Record October 2002
only reason to reserve additional digest types is to increase only reason to reserve additional digest types is to increase
security. security.
Gudmundsson Expires June 2003 [Page 8]
INTERNET-DRAFT Delegation Signer Record December 2002
DS records MUST point to zone KEY records that are allowed to DS records MUST point to zone KEY records that are allowed to
authenticate DNS data. The indicated KEY record's protocol field authenticate DNS data. The indicated KEY record's protocol field
MUST be set to 3; flag field bits 0 and 6 MUST be set to 0; bit 7 MUST be set to 3; flag field bits 0 and 6 MUST be set to 0; bit 7
@@ -451,15 +470,6 @@ INTERNET-DRAFT Delegation Signer Record October 2002
The size of the DS RDATA for type 1 (SHA-1) is 24 bytes, regardless The size of the DS RDATA for type 1 (SHA-1) is 24 bytes, regardless
of key size, new digest types probably will have larger digests. of key size, new digest types probably will have larger digests.
Gudmundsson Expires April 2003 [Page 8]
INTERNET-DRAFT Delegation Signer Record October 2002
2.4.1 Justifications for Fields 2.4.1 Justifications for Fields
The algorithm and key tag fields are present to allow resolvers to The algorithm and key tag fields are present to allow resolvers to
@@ -500,6 +510,14 @@ INTERNET-DRAFT Delegation Signer Record October 2002
preferable. Thus the only option for early adopters is to upgrade to preferable. Thus the only option for early adopters is to upgrade to
DS as soon as possible. DS as soon as possible.
Gudmundsson Expires June 2003 [Page 9]
INTERNET-DRAFT Delegation Signer Record December 2002
2.6.1 Backwards compatibility with RFC2535 and RFC1035 2.6.1 Backwards compatibility with RFC2535 and RFC1035
This section documents how a resolver determines the type of This section documents how a resolver determines the type of
@@ -510,13 +528,6 @@ INTERNET-DRAFT Delegation Signer Record October 2002
RFC2535 adds the following two cases: RFC2535 adds the following two cases:
Gudmundsson Expires April 2003 [Page 9]
INTERNET-DRAFT Delegation Signer Record October 2002
Secure RFC2535: NS + NXT + SIG(NXT) Secure RFC2535: NS + NXT + SIG(NXT)
NXT bit map contains: NS SIG NXT NXT bit map contains: NS SIG NXT
Unsecure RFC2535: NS + KEY + SIG(KEY) + NXT + SIG(NXT) Unsecure RFC2535: NS + KEY + SIG(KEY) + NXT + SIG(NXT)
@@ -559,19 +570,9 @@ INTERNET-DRAFT Delegation Signer Record October 2002
Gudmundsson Expires June 2003 [Page 10]
INTERNET-DRAFT Delegation Signer Record December 2002
Gudmundsson Expires April 2003 [Page 10]
INTERNET-DRAFT Delegation Signer Record October 2002
3 Resolver 3 Resolver
@@ -626,9 +627,9 @@ INTERNET-DRAFT Delegation Signer Record October 2002
Gudmundsson Expires April 2003 [Page 11] Gudmundsson Expires June 2003 [Page 11]
INTERNET-DRAFT Delegation Signer Record October 2002 INTERNET-DRAFT Delegation Signer Record December 2002
The resolver determines the security status of "unsecure.example." by The resolver determines the security status of "unsecure.example." by
@@ -683,9 +684,9 @@ INTERNET-DRAFT Delegation Signer Record October 2002
Gudmundsson Expires April 2003 [Page 12] Gudmundsson Expires June 2003 [Page 12]
INTERNET-DRAFT Delegation Signer Record October 2002 INTERNET-DRAFT Delegation Signer Record December 2002
set up secure delegations. Implementations that do not understand the set up secure delegations. Implementations that do not understand the
@@ -713,8 +714,8 @@ INTERNET-DRAFT Delegation Signer Record October 2002
Rose, Edward Lewis, Lars-Johan Liman, Matt Larson, Mark Kosters, Dan Rose, Edward Lewis, Lars-Johan Liman, Matt Larson, Mark Kosters, Dan
Massey, Olaf Kolman, Phillip Hallam-Baker, Miek Gieben, Havard Massey, Olaf Kolman, Phillip Hallam-Baker, Miek Gieben, Havard
Eidnes, Donald Eastlake 3rd., Randy Bush, David Blacka, Steve Eidnes, Donald Eastlake 3rd., Randy Bush, David Blacka, Steve
Bellovin, Rob Austein, Derek Atkins, Roy Arends, Harald Alvestrand, Bellovin, Rob Austein, Derek Atkins, Roy Arends, Mark Andrews, Harald
and others have provided useful comments. Alvestrand, and others have provided useful comments.
Normative References: Normative References:
@@ -740,9 +741,9 @@ Normative References:
Gudmundsson Expires April 2003 [Page 13] Gudmundsson Expires June 2003 [Page 13]
INTERNET-DRAFT Delegation Signer Record October 2002 INTERNET-DRAFT Delegation Signer Record December 2002
[RFC3226] O. Gudmundsson, ``DNSSEC and IPv6 A6 aware server/resolver [RFC3226] O. Gudmundsson, ``DNSSEC and IPv6 A6 aware server/resolver
@@ -797,4 +798,5 @@ Full Copyright Statement
Gudmundsson Expires April 2003 [Page 14] Gudmundsson Expires June 2003 [Page 14]