172 lines
3.8 KiB
Plaintext
172 lines
3.8 KiB
Plaintext
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Network Working Group Assar Westerlund
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<draft-ietf-cat-krb5-ipv6.txt> SICS
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Internet-Draft October, 1997
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Expire in six months
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Kerberos over IPv6
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Status of this Memo
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This document is an Internet-Draft. Internet-Drafts are working
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documents of the Internet Engineering Task Force (IETF), its areas,
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and its working groups. Note that other groups may also distribute
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working documents as Internet-Drafts.
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Internet-Drafts are draft documents valid for a maximum of six months
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and may be updated, replaced, or obsoleted by other documents at any
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time. It is inappropriate to use Internet- Drafts as reference
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material or to cite them other than as "work in progress."
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To view the entire list of current Internet-Drafts, please check the
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"1id-abstracts.txt" listing contained in the Internet-Drafts Shadow
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Directories on ftp.is.co.za (Africa), ftp.nordu.net (Europe),
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munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or
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ftp.isi.edu (US West Coast).
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Distribution of this memo is unlimited. Please send comments to the
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<cat-ietf@mit.edu> mailing list.
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Abstract
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This document specifies the address types and transport types
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necessary for using Kerberos [RFC1510] over IPv6 [RFC1883].
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Specification
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IPv6 addresses are 128-bit (16-octet) quantities, encoded in MSB
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order. The type of IPv6 addresses is twenty-four (24).
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The following addresses (see [RFC1884]) MUST not appear in any
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Kerberos packet:
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the Unspecified Address
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the Loopback Address
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Link-Local addresses
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IPv4-mapped IPv6 addresses MUST be represented as addresses of type
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2.
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Westerlund [Page 1]
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Internet Draft Kerberos over IPv6 October, 1997
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Communication with the KDC over IPv6 MUST be done as in section 8.2.1
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of [RFC1510].
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Discussion
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[RFC1510] suggests using the address family constants in
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<sys/socket.h> from BSD. This cannot be done for IPv6 as these
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numbers have diverged and are different on different BSD-derived
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systems. [RFC2133] does not either specify a value for AF_INET6.
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Thus a value has to be decided and the implementations have to
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convert between the value used in Kerberos HostAddress and the local
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AF_INET6.
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There are a few different address types in IPv6, see [RFC1884]. Some
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of these are used for quite special purposes and it makes no sense to
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include them in Kerberos packets.
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It is necessary to represent IPv4-mapped addresses as Internet
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addresses (type 2) to be compatible with Kerberos implementations
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that only support IPv4.
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Security considerations
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This memo does not introduce any known security considerations in
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addition to those mentioned in [RFC1510].
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References
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[RFC1510] Kohl, J. and Neuman, C., "The Kerberos Network
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Authentication Service (V5)", RFC 1510, September 1993.
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[RFC1883] Deering, S., Hinden, R., "Internet Protocol, Version 6
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(IPv6) Specification", RFC 1883, December 1995.
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[RFC1884] Hinden, R., Deering, S., "IP Version 6 Addressing
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Architecture", RFC 1884, December 1995.
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[RFC2133] Gilligan, R., Thomson, S., Bound, J., Stevens, W., "Basic
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Socket Interface Extensions for IPv6", RFC2133, April 1997.
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Author's Address
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Assar Westerlund
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Swedish Institute of Computer Science
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Box 1263
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S-164 29 KISTA
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Sweden
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Westerlund [Page 2]
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Internet Draft Kerberos over IPv6 October, 1997
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Phone: +46-8-7521526
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Fax: +46-8-7517230
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EMail: assar@sics.se
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Westerlund [Page 3]
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