Security-55163.44.tar.gz

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

diff --git a/libsecurity_codesigning/lib/Requirements.cpp b/libsecurity_codesigning/lib/Requirements.cpp
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+/*
+ * Copyright (c) 2006 Apple Computer, 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@
+ */
+
+//
+// Requirements - SecRequirement API objects
+//
+#include "Requirements.h"
+
+namespace Security {
+namespace CodeSigning {
+
+
+//
+// Create from a Requirement blob in memory
+//
+SecRequirement::SecRequirement(const void *data, size_t length)
+       : mReq(NULL)
+{
+       const Requirement *req = (const Requirement *)data;
+       if (!req->validateBlob(length))
+               MacOSError::throwMe(errSecCSReqInvalid);
+       mReq = req->clone();
+}
+
+
+//
+// Create from a genuine Requirement object
+//
+SecRequirement::SecRequirement(const Requirement *req, bool transferOwnership)
+       : mReq(NULL)
+{
+       if (!req->validateBlob())
+               MacOSError::throwMe(errSecCSReqInvalid);
+       
+       if (transferOwnership)
+               mReq = req;
+       else
+               mReq = req->clone();
+}
+ 
+
+//
+// Clean up a SecRequirement object
+//
+SecRequirement::~SecRequirement() throw()
+try {
+       ::free((void *)mReq);
+} catch (...) {
+       return;
+}
+
+
+//
+// CF-level comparison of SecRequirement objects compares the entire requirement
+// structure for equality. This means that two requirement programs are recognized
+// as equal if they're written identically (modulo comments and syntactic sugar).
+// Obviously, equality of outcome is not in the cards. :-)
+//
+bool SecRequirement::equal(SecCFObject &secOther)
+{
+       SecRequirement *other = static_cast<SecRequirement *>(&secOther);
+       return !memcmp(this->requirement(), other->requirement(), this->requirement()->length());
+}
+
+CFHashCode SecRequirement::hash()
+{
+       return CFHash(CFTempDataWrap(*this->requirement()));
+}
+
+
+} // end namespace CodeSigning
+} // end namespace Security