1 files changed, 131 insertions, 0 deletions
diff --git a/src/lib/Bcfg2/Server/Plugins/Properties.py b/src/lib/Bcfg2/Server/Plugins/Properties.py
new file mode 100644
index 000000000..0271e89ba
--- /dev/null
+++ b/src/lib/Bcfg2/Server/Plugins/Properties.py
@@ -0,0 +1,131 @@
+import os
+import re
+import sys
+import copy
+import logging
+import lxml.etree
+import Bcfg2.Server.Plugin
+try:
+    from Bcfg2.Encryption import ssl_decrypt, EVPError
+    have_crypto = True
+except ImportError:
+    have_crypto = False
+
+logger = logging.getLogger(__name__)
+
+SETUP = None
+
+def passphrases():
+    section = "encryption"
+    if SETUP.cfp.has_section(section):
+        return dict([(o, SETUP.cfp.get(section, o))
+                     for o in SETUP.cfp.options(section)])
+    else:
+        return dict()
+
+
+class PropertyFile(Bcfg2.Server.Plugin.StructFile):
+    """Class for properties files."""
+    def __init__(self, name):
+        Bcfg2.Server.Plugin.StructFile.__init__(self, name)
+
+    def write(self):
+        """ Write the data in this data structure back to the property
+        file """
+        if self.validate_data():
+            try:
+                open(self.name,
+                     "wb").write(lxml.etree.tostring(self.xdata,
+                                                     pretty_print=True))
+                return True
+            except IOError:
+                err = sys.exc_info()[1]
+                logger.error("Failed to write %s: %s" % (self.name, err))
+                return False
+        else:
+            return False
+
+    def validate_data(self):
+        """ ensure that the data in this object validates against the
+        XML schema for this property file (if a schema exists) """
+        schemafile = self.name.replace(".xml", ".xsd")
+        if os.path.exists(schemafile):
+            try:
+                schema = lxml.etree.XMLSchema(file=schemafile)
+            except:
+                logger.error("Failed to process schema for %s" % self.name)
+                return False
+        else:
+            # no schema exists
+            return True
+
+        if not schema.validate(self.xdata):
+            logger.error("Data for %s fails to validate; run bcfg2-lint for "
+                         "more details" % self.name)
+            return False
+        else:
+            return True
+
+    def Index(self):
+        Bcfg2.Server.Plugin.StructFile.Index(self)
+        if self.xdata.get("encryption", "false").lower() != "false":
+            if not have_crypto:
+                msg = "Properties: M2Crypto is not available: %s" % self.name
+                logger.error(msg)
+                raise Bcfg2.Server.Plugin.PluginExecutionError(msg)
+            for el in self.xdata.xpath("*[@encrypted]"):
+                try:
+                    el.text = self._decrypt(el)
+                except EVPError:
+                    msg = "Failed to decrypt %s element in %s" % (el.tag,
+                                                                  self.name)
+                    logger.error(msg)
+                    raise Bcfg2.Server.PluginExecutionError(msg)
+
+    def _decrypt(self, element):
+        passphrases = passphrases()
+        try:
+            passphrase = passphrases[element.get("encrypted")]
+            try:
+                return ssl_decrypt(crypted, self.passphrase)
+            except EVPError:
+                # error is raised below
+                pass
+        except KeyError:
+            for passwd in passphrases.values():
+                try:
+                    rv = ssl_decrypt(crypted, passwd)
+                    return rv
+                except EVPError:
+                    pass
+        raise EVPError("Failed to decrypt")
+
+class PropDirectoryBacked(Bcfg2.Server.Plugin.DirectoryBacked):
+    __child__ = PropertyFile
+    patterns = re.compile(r'.*\.xml$')
+
+
+class Properties(Bcfg2.Server.Plugin.Plugin,
+                 Bcfg2.Server.Plugin.Connector):
+    """
+       The properties plugin maps property
+       files into client metadata instances.
+    """
+    name = 'Properties'
+
+    def __init__(self, core, datastore):
+        global SETUP
+        Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
+        Bcfg2.Server.Plugin.Connector.__init__(self)
+        try:
+            self.store = PropDirectoryBacked(self.data, core.fam)
+        except OSError:
+            e = sys.exc_info()[1]
+            self.logger.error("Error while creating Properties store: %s %s" %
+                              (e.strerror, e.filename))
+            raise Bcfg2.Server.Plugin.PluginInitError
+
+        SETUP = core.setup
+
+    def get_additional_data(self, _):
+        return copy.copy(self.store.entries)