[krbdev.mit.edu #6827] SVN Commit

[Greg Hudson via RT]

Fix multiple checksum handling bugs, as described in:
  CVE-2010-1324
  CVE-2010-1323
  CVE-2010-4020
  CVE-2010-4021

* Return the correct (keyed) checksums as the mandatory checksum type
  for DES enctypes.
* Restrict simplified-profile checksums to their corresponding etypes.
* Add internal checks to reduce the risk of stream ciphers being used
  with simplified-profile key derivation or other algorithms relying
  on the block encryption primitive.
* Use the mandatory checksum type for the PKINIT KDC signature,
  instead of the first-listed keyed checksum.
* Use the mandatory checksum type when sending KRB-SAFE messages by
  default, instead of the first-listed keyed checksum.
* Use the mandatory checksum type for the t_kperf test program.
* Use the mandatory checksum type (without additional logic) for the
  FAST request checksum.
* Preserve the existing checksum choices (unkeyed checksums for DES
  enctypes) for the authenticator checksum, using explicit logic.
* Ensure that SAM checksums received from the KDC are keyed.
* Ensure that PAC checksums are keyed.


http://src.mit.edu/fisheye/changelog/krb5/?cs=24538
Commit By: ghudson
Revision: 24538
Changed Files:
U   trunk/src/lib/crypto/crypto_tests/t_kperf.c
U   trunk/src/lib/crypto/krb/cksumtypes.c
U   trunk/src/lib/crypto/krb/dk/checksum_hmac.c
U   trunk/src/lib/crypto/krb/dk/derive.c
U   trunk/src/lib/crypto/krb/etypes.c
U   trunk/src/lib/crypto/krb/etypes.h
U   trunk/src/lib/krb5/krb/fast.c
U   trunk/src/lib/krb5/krb/mk_req_ext.c
U   trunk/src/lib/krb5/krb/mk_safe.c
U   trunk/src/lib/krb5/krb/pac.c
U   trunk/src/lib/krb5/krb/preauth2.c
U   trunk/src/plugins/preauth/pkinit/pkinit_srv.c