Security-55163.44.tar.gz

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

diff --git a/libsecurity_codesigning/lib/singlediskrep.cpp b/libsecurity_codesigning/lib/singlediskrep.cpp
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+/*
+ * Copyright (c) 2006-2010 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@
+ */
+
+//
+// singlediskrep - semi-abstract diskrep for a single file of some kind
+//
+#include "singlediskrep.h"
+#include "csutilities.h"
+#include <security_utilities/cfutilities.h>
+
+namespace Security {
+namespace CodeSigning {
+
+using namespace UnixPlusPlus;
+
+
+//
+// Construct a SingleDiskRep
+//
+SingleDiskRep::SingleDiskRep(const std::string &path)
+       : mPath(path)
+{
+}
+
+
+//
+// The default binary identification of a SingleDiskRep is the (SHA-1) hash
+// of the entire file itself.
+//
+CFDataRef SingleDiskRep::identification()
+{
+       SHA1 hash;
+       this->fd().seek(0);
+       hashFileData(this->fd(), &hash);
+       SHA1::Digest digest;
+       hash.finish(digest);
+       return makeCFData(digest, sizeof(digest));
+}
+
+
+//
+// Both the canonical and main executable path of a SingleDiskRep is, well, its path.
+//
+CFURLRef SingleDiskRep::canonicalPath()
+{
+       return makeCFURL(mPath);
+}
+
+string SingleDiskRep::mainExecutablePath()
+{
+       return mPath;
+}
+
+
+//
+// The default signing limit is the size of the file.
+// This will do unless the signing data gets creatively stuck in there somewhere.
+//
+size_t SingleDiskRep::signingLimit()
+{
+       return fd().fileSize();
+}
+
+
+//
+// A lazily opened read-only file descriptor for the path.
+//
+FileDesc &SingleDiskRep::fd()
+{
+       if (!mFd)
+               mFd.open(mPath, O_RDONLY);
+       return mFd;
+}
+
+
+//
+// Flush cached state
+//
+void SingleDiskRep::flush()
+{
+       mFd.close();
+}
+
+
+//
+// The recommended identifier of a SingleDiskRep is, absent any better clue,
+// the basename of its path.
+//
+string SingleDiskRep::recommendedIdentifier(const SigningContext &)
+{
+       return canonicalIdentifier(mPath);
+}
+
+
+//
+// Prototype Writers
+//
+FileDesc &SingleDiskRep::Writer::fd()
+{
+       if (!mFd)
+               mFd.open(rep->path(), O_RDWR);
+       return mFd;
+}
+
+
+} // end namespace CodeSigning
+} // end namespace Security