Security-55163.44.tar.gz

[apple/security.git] / libsecurity_codesigning / lib / reqparser.cpp

diff --git a/libsecurity_codesigning/lib/reqparser.cpp b/libsecurity_codesigning/lib/reqparser.cpp
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+/*
+ * Copyright (c) 2006-2007 Apple Inc. All Rights Reserved.
+ * 
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+//
+// reqparser - interface to Requirement language parser/compiler
+//
+#include "reqparser.h"
+#include "antlrplugin.h"
+#include "cserror.h"
+#include "codesigning_dtrace.h"
+#include <CoreFoundation/CoreFoundation.h>
+#include <security_utilities/osxcode.h>
+
+namespace Security {
+namespace CodeSigning {
+
+
+struct PluginHost {
+       PluginHost();
+       RefPointer<LoadableBundle> plugin;
+       AntlrPlugin *antlr;
+};
+
+ModuleNexus<PluginHost> plugin;
+
+
+//
+// The PluginHost constructor runs under the protection of ModuleNexus's constructor,
+// so it doesn't have to worry about thread safety and such.
+//
+PluginHost::PluginHost()
+{
+       if (CFBundleRef securityFramework = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.security")))
+               if (CFRef<CFURLRef> plugins = CFBundleCopyBuiltInPlugInsURL(securityFramework))
+                       if (CFRef<CFURLRef> pluginURL = makeCFURL("csparser.bundle", true, plugins)) {
+                               plugin = new LoadableBundle(cfString(pluginURL).c_str());
+                               plugin->load();
+                               CODESIGN_LOAD_ANTLR();
+                               antlr = reinterpret_cast<FindAntlrPlugin *>(plugin->lookupSymbol(FINDANTLRPLUGIN))();
+                               return;
+                       }
+                               
+       // can't load plugin - fail
+       MacOSError::throwMe(errSecCSInternalError);
+}
+
+
+//
+// Drive a parsing function through the plugin harness and translate any errors
+// into a CFError exception.
+//
+template <class Result, class Source>
+const Result *parse(Source source, const Result *(*AntlrPlugin::*func)(Source, string &))
+{
+       string errors;
+       if (const Result *result = (plugin().antlr->*func)(source, errors))
+               return result;
+       else
+               CSError::throwMe(errSecCSReqInvalid, kSecCFErrorRequirementSyntax, CFTempString(errors));               
+}
+
+
+//
+// Implement the template instances by passing them through the plugin's eye-of-the-needle.
+// Any other combination of input and output types will cause linker errors.
+//
+template <>
+const Requirement *RequirementParser<Requirement>::operator () (std::FILE *source)
+{
+       return parse(source, &AntlrPlugin::fileRequirement);
+}
+
+template <>
+const Requirement *RequirementParser<Requirement>::operator () (const std::string &source)
+{
+       return parse(source, &AntlrPlugin::stringRequirement);
+}
+
+template <>
+const Requirements *RequirementParser<Requirements>::operator () (std::FILE *source)
+{
+       return parse(source, &AntlrPlugin::fileRequirements);
+}
+
+template <>
+const Requirements *RequirementParser<Requirements>::operator () (const std::string &source)
+{
+       return parse(source, &AntlrPlugin::stringRequirements);
+}
+
+template <>
+const BlobCore *RequirementParser<BlobCore>::operator () (std::FILE *source)
+{
+       return parse(source, &AntlrPlugin::fileGeneric);
+}
+
+template <>
+const BlobCore *RequirementParser<BlobCore>::operator () (const std::string &source)
+{
+       return parse(source, &AntlrPlugin::stringGeneric);
+}
+
+
+}      // CodeSigning
+}      // Security