192 lines
8.4 KiB
Diff
192 lines
8.4 KiB
Diff
diff --exclude-from=exclude -N -u -r nsasepolgen/src/sepolgen/access.py policycoreutils-2.0.82/sepolgen-1.0.23/src/sepolgen/access.py
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--- nsasepolgen/src/sepolgen/access.py 2010-03-22 14:08:29.000000000 -0400
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+++ policycoreutils-2.0.82/sepolgen-1.0.23/src/sepolgen/access.py 2010-03-24 16:11:37.000000000 -0400
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@@ -32,6 +32,7 @@
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"""
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import refpolicy
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+from selinux import audit2why
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def is_idparam(id):
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"""Determine if an id is a paramater in the form $N, where N is
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@@ -85,6 +86,8 @@
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self.obj_class = None
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self.perms = refpolicy.IdSet()
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self.audit_msgs = []
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+ self.type = audit2why.TERULE
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+ self.bools = []
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# The direction of the information flow represented by this
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# access vector - used for matching
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@@ -253,20 +256,22 @@
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for av in l:
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self.add_av(AccessVector(av))
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- def add(self, src_type, tgt_type, obj_class, perms, audit_msg=None):
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+ def add(self, src_type, tgt_type, obj_class, perms, audit_msg=None, avc_type=audit2why.TERULE, bools=[]):
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"""Add an access vector to the set.
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"""
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tgt = self.src.setdefault(src_type, { })
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cls = tgt.setdefault(tgt_type, { })
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- if cls.has_key(obj_class):
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- access = cls[obj_class]
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+ if cls.has_key((obj_class, avc_type)):
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+ access = cls[obj_class, avc_type]
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else:
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access = AccessVector()
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access.src_type = src_type
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access.tgt_type = tgt_type
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access.obj_class = obj_class
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- cls[obj_class] = access
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+ access.bools = bools
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+ access.type = avc_type
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+ cls[obj_class, avc_type] = access
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access.perms.update(perms)
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if audit_msg:
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diff --exclude-from=exclude -N -u -r nsasepolgen/src/sepolgen/audit.py policycoreutils-2.0.82/sepolgen-1.0.23/src/sepolgen/audit.py
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--- nsasepolgen/src/sepolgen/audit.py 2010-03-22 14:08:29.000000000 -0400
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+++ policycoreutils-2.0.82/sepolgen-1.0.23/src/sepolgen/audit.py 2010-03-24 16:11:37.000000000 -0400
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@@ -68,6 +68,17 @@
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stdout=subprocess.PIPE).communicate()[0]
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return output
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+def get_log_msgs():
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+ """Obtain all of the avc and policy load messages from /var/log/messages.
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+
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+ Returns:
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+ string contain all of the audit messages returned by /var/log/messages.
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+ """
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+ import subprocess
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+ output = subprocess.Popen(["/bin/grep", "avc", "/var/log/messages"],
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+ stdout=subprocess.PIPE).communicate()[0]
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+ return output
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+
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# Classes representing audit messages
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class AuditMessage:
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@@ -127,6 +138,9 @@
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if fields[0] == "path":
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self.path = fields[1][1:-1]
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return
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+import selinux.audit2why as audit2why
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+
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+avcdict = {}
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class AVCMessage(AuditMessage):
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"""AVC message representing an access denial or granted message.
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@@ -167,6 +181,8 @@
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self.path = ""
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self.accesses = []
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self.denial = True
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+ self.type = audit2why.TERULE
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+ self.bools = []
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def __parse_access(self, recs, start):
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# This is kind of sucky - the access that is in a space separated
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@@ -226,7 +242,31 @@
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if not found_src or not found_tgt or not found_class or not found_access:
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raise ValueError("AVC message in invalid format [%s]\n" % self.message)
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-
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+ self.analyze()
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+
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+ def analyze(self):
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+ tcontext = self.tcontext.to_string()
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+ scontext = self.scontext.to_string()
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+ access_tuple = tuple( self.accesses)
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+ if (scontext, tcontext, self.tclass, access_tuple) in avcdict.keys():
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+ self.type, self.bools = avcdict[(scontext, tcontext, self.tclass, access_tuple)]
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+ else:
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+ self.type, self.bools = audit2why.analyze(scontext, tcontext, self.tclass, self.accesses);
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+ if self.type == audit2why.NOPOLICY:
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+ self.type = audit2why.TERULE
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+ if self.type == audit2why.BADTCON:
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+ raise ValueError("Invalid Target Context %s\n" % tcontext)
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+ if self.type == audit2why.BADSCON:
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+ raise ValueError("Invalid Source Context %s\n" % scontext)
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+ if self.type == audit2why.BADSCON:
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+ raise ValueError("Invalid Type Class %s\n" % self.tclass)
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+ if self.type == audit2why.BADPERM:
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+ raise ValueError("Invalid permission %s\n" % " ".join(self.accesses))
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+ if self.type == audit2why.BADCOMPUTE:
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+ raise ValueError("Error during access vector computation")
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+
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+ avcdict[(scontext, tcontext, self.tclass, access_tuple)] = (self.type, self.bools)
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+
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class PolicyLoadMessage(AuditMessage):
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"""Audit message indicating that the policy was reloaded."""
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def __init__(self, message):
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@@ -469,10 +509,10 @@
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if avc_filter:
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if avc_filter.filter(avc):
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av_set.add(avc.scontext.type, avc.tcontext.type, avc.tclass,
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- avc.accesses, avc)
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+ avc.accesses, avc, avc_type=avc.type, bools=avc.bools)
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else:
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av_set.add(avc.scontext.type, avc.tcontext.type, avc.tclass,
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- avc.accesses, avc)
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+ avc.accesses, avc, avc_type=avc.type, bools=avc.bools)
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return av_set
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class AVCTypeFilter:
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diff --exclude-from=exclude -N -u -r nsasepolgen/src/sepolgen/policygen.py policycoreutils-2.0.82/sepolgen-1.0.23/src/sepolgen/policygen.py
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--- nsasepolgen/src/sepolgen/policygen.py 2010-03-12 09:34:56.000000000 -0500
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+++ policycoreutils-2.0.82/sepolgen-1.0.23/src/sepolgen/policygen.py 2010-03-24 16:11:37.000000000 -0400
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@@ -29,6 +29,8 @@
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import access
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import interfaces
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import matching
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+import selinux.audit2why as audit2why
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+from setools import *
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# Constants for the level of explanation from the generation
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# routines
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@@ -77,6 +79,7 @@
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self.dontaudit = False
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+ self.domains = None
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def set_gen_refpol(self, if_set=None, perm_maps=None):
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"""Set whether reference policy interfaces are generated.
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@@ -151,8 +154,37 @@
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rule = refpolicy.AVRule(av)
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if self.dontaudit:
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rule.rule_type = rule.DONTAUDIT
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+ rule.comment = ""
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if self.explain:
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rule.comment = refpolicy.Comment(explain_access(av, verbosity=self.explain))
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+ if av.type == audit2why.ALLOW:
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+ rule.comment += "#!!!! This avc is allowed in the current policy\n"
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+ if av.type == audit2why.DONTAUDIT:
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+ rule.comment += "#!!!! This avc has a dontaudit rule in the current policy\n"
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+ if av.type == audit2why.BOOLEAN:
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+ if len(av.bools) > 1:
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+ rule.comment += "#!!!! This avc can be allowed using one of the these booleans:\n# %s\n" % ", ".join(map(lambda x: av.bools[0][0], av.bools))
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+ else:
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+ rule.comment += "#!!!! This avc can be allowed using the boolean '%s'\n" % av.bools[0][0]
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+
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+ if av.type == audit2why.CONSTRAINT:
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+ rule.comment += "#!!!! This avc is a constraint violation. You will need to add an attribute to either the source or target type to make it work.\n"
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+ rule.comment += "#Contraint rule: "
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+
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+ if av.type == audit2why.TERULE:
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+ if "write" in av.perms:
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+ if "dir" in av.obj_class or "open" in av.perms:
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+ if not self.domains:
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+ self.domains = seinfo(ATTRIBUTE, name="domain")[0]["types"]
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+ types=[]
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+ for i in map(lambda x: x[TCONTEXT], sesearch([ALLOW], {SCONTEXT: av.src_type, CLASS: av.obj_class, PERMS: av.perms})):
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+ if i not in self.domains:
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+ types.append(i)
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+ if len(types) == 1:
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+ rule.comment += "#!!!! The source type '%s' can write to a '%s' of the following type:\n# %s\n" % ( av.src_type, av.obj_class, ", ".join(types))
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+ elif len(types) >= 1:
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+ rule.comment += "#!!!! The source type '%s' can write to a '%s' of the following types:\n# %s\n" % ( av.src_type, av.obj_class, ", ".join(types))
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+
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self.module.children.append(rule)
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