Robert Watson f51e58036e Redesign the externalization APIs from the MAC Framework to ... the MAC policy modules to improve robustness against C string bugs and vulnerabilities. Following these revisions, all string construction of labels for export to userspace (or elsewhere) is performed using the sbuf API, which prevents the consumer from having to perform laborious and intricate pointer and buffer checks. This substantially simplifies the externalization logic, both at the MAC Framework level, and in individual policies; this becomes especially useful when policies export more complex label data, such as with compartments in Biba and MLS. Bundled in here are some other minor fixes associated with externalization: including avoiding malloc while holding the process mutex in mac_lomac, and hence avoid a failure mode when printing labels during a downgrade operation due to the removal of the M_NOWAIT case. This has been running in the MAC development tree for about three weeks without problems. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories		2003-06-23 01:26:34 +00:00
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mac_mls.c	Redesign the externalization APIs from the MAC Framework to	2003-06-23 01:26:34 +00:00
mac_mls.h	License and wording updates: NAI has authorized the removal of clause	2002-11-04 01:53:12 +00:00