pull up 22355, 22356, 22357 from trunk

pull up 22355, 22356, 22357 from trunk

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 r22357 | ghudson | 2009-05-20 04:05:53 +0200 (Wed, 20 May 2009) | 6 lines

 ticket: 6490

 Restore compatibility with KDCs using key usage 8 to encrypt TGS
 replies in a subkey, by implementing a fallback in
 krb5_arcfour_decrypt.

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 r22356 | ghudson | 2009-05-20 01:17:49 +0200 (Wed, 20 May 2009) | 13 lines

 ticket: 6490
 status: open
 tags: pullup

 When using keyed checksum types with TGS subkeys, Microsoft AD 2003
 verifies the checksum using the subkey, whereas MIT and Heimdal verify
 it using the TGS session key.  (RFC 4120 is actually silent on which
 is correct; RFC 4757 specifies the TGS session key.)  To sidestep this
 interop issue, don't use keyed checksum types with RC4 keys without
 explicit configuration in krb5.conf.  Using keyed checksum types with
 AES is fine since, experimentally, AD 2008 accepts checksums keyed
 with the TGS session key.

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 r22355 | hartmans | 2009-05-19 01:28:53 +0200 (Tue, 19 May 2009) | 5 lines

 ticket: 6490
 status: open

 In practice, key usage 9 requires no translation.

ticket: 6490
version_fixed: 1.7

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-7@22374 dc483132-0cff-0310-8789-dd5450dbe970