GNOME Bugzilla – Bug 123670
xmlsec-mscrypto: HMAC is not supported
Last modified: 2010-04-26 21:43:51 UTC
Does not look like MS has or will have HMAC support in the hearest future.
See http://msdn.microsoft.com/en-us/library/Aa379863
fixed, should be in xmlsec 1.2.15