Security-57031.1.35.tar.gz

[apple/security.git] / securityd / src / codesigdb.h

diff --git a/securityd/src/codesigdb.h b/securityd/src/codesigdb.h
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+/*
+ * Copyright (c) 2003-2007 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@
+ */
+
+
+//
+// codesigdb - code-hash equivalence database
+//
+#ifndef _H_CODESIGDB
+#define _H_CODESIGDB
+
+#include "acls.h"
+#include <security_cdsa_utilities/db++.h>
+#include <security_cdsa_utilities/osxverifier.h>
+#include <Security/CodeSigning.h>
+
+
+class Process;
+class CodeSignatures;
+
+
+//
+// A CodeSignaturse object represents a database of code-signature equivalencies
+// as (previously) expressed by a user and/or the system.
+// You'll usually only need one of these.
+//
+class CodeSignatures { 
+public:
+       //
+       // Identity is an abstract class modeling a code-identity in the database.
+       // It can represent either an existing or latent code-hash link.
+       // Subclass must provide path and hash source functions.
+       //
+       class Identity {
+               friend class CodeSignatures;
+       public:
+               Identity();
+               virtual ~Identity();
+               
+               operator bool () const                          { return mState == valid; }
+               std::string path()                                      { return getPath(); }
+               std::string name()                                      { return canonicalName(path()); }
+               std::string trustedName() const         { return mName; }
+
+               static std::string canonicalName(const std::string &path);
+               
+               IFDUMP(void debugDump(const char *how = NULL) const);
+               
+               virtual std::string getPath() const = 0;
+               virtual const CssmData getHash() const = 0;
+       
+       private:
+               enum { untried, valid, invalid } mState;
+               std::string mName;              // link db value (canonical name linked to)
+       };
+       
+public:
+       CodeSignatures(const char *path);
+       ~CodeSignatures();
+       
+       void open(const char *path);
+       
+public:
+       bool find(Identity &id, uid_t user);
+       
+       void makeLink(Identity &id, const std::string &ident, bool forUser = false, uid_t user = 0);
+
+       void addLink(const CssmData &oldHash, const CssmData &newHash,
+               const char *name, bool forSystem);
+       void removeLink(const CssmData &hash, const char *name, bool forSystem);
+       
+       IFDUMP(void debugDump(const char *how = NULL) const);
+       
+public:
+       bool verify(Process &process, const OSXVerifier &verifier, const AclValidationContext &context);
+       
+private:
+       OSStatus matchSignedClientToLegacyACL(Process &process, SecCodeRef code,
+               const OSXVerifier &verifier, const AclValidationContext &context);
+       bool verifyLegacy(Process &process, const CssmData &signature, string path);
+       
+private:
+       UnixPlusPlus::UnixDb mDb;
+
+       // lock hierarchy: mUILock first, then mDatabaseLock, no back-off
+       Mutex mDatabaseLock;                    // controls mDb access
+       Mutex mUILock;                                  // serializes user interaction
+};
+
+
+
+#endif //_H_CODESIGDB