X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/securityd/src/dbcrypto.h

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+/*
+ * Copyright (c) 2000-2001,2003-2006,2013 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@
+ */
+
+
+//
+// dbcrypto - cryptographic core for database and key blob cryptography
+//
+#ifndef _H_DBCRYPTO
+#define _H_DBCRYPTO
+
+#include <securityd_client/ssblob.h>
+#include <security_cdsa_client/cspclient.h>
+#include <security_cdsa_client/keyclient.h>
+
+using namespace SecurityServer;
+
+
+//
+// A DatabaseCryptoCore object encapsulates the secret state of a database.
+// It provides for encoding and decoding of database blobs and key blobs,
+// and holds all state related to the database secrets.
+//
+class DatabaseCryptoCore {
+public:
+    DatabaseCryptoCore();
+	virtual ~DatabaseCryptoCore();
+    
+    bool isValid() const	{ return mIsValid; }
+	bool hasMaster() const	{ return mHaveMaster; }
+    void invalidate();
+
+    void generateNewSecrets();
+	CssmClient::Key masterKey();
+
+	void setup(const DbBlob *blob, const CssmData &passphrase);
+	void setup(const DbBlob *blob, CssmClient::Key master);
+
+    void decodeCore(const DbBlob *blob, void **privateAclBlob = NULL);
+    DbBlob *encodeCore(const DbBlob &blobTemplate,
+        const CssmData &publicAcl, const CssmData &privateAcl) const;
+	void importSecrets(const DatabaseCryptoCore &src);
+        
+    KeyBlob *encodeKeyCore(const CssmKey &key,
+        const CssmData &publicAcl, const CssmData &privateAcl,
+		bool inTheClear) const;
+    void decodeKeyCore(KeyBlob *blob,
+        CssmKey &key, void * &pubAcl, void * &privAcl) const;
+
+    static const uint32 managedAttributes = KeyBlob::managedAttributes;
+	static const uint32 forcedAttributes = KeyBlob::forcedAttributes;
+
+    bool get_encryption_key(CssmOwnedData &data);
+	
+public:
+	bool validatePassphrase(const CssmData &passphrase);
+	
+private:
+	bool mHaveMaster;				// master key has been entered (setup)
+    bool mIsValid;					// master secrets are valid (decode or generateNew)
+    
+	CssmClient::Key mMasterKey;		// database master key
+	uint8 mSalt[20];				// salt for master key derivation from passphrase (only)
+	
+    CssmClient::Key mEncryptionKey;	// master encryption key
+    CssmClient::Key mSigningKey;	// master signing key
+
+    CssmClient::Key deriveDbMasterKey(const CssmData &passphrase) const;
+    CssmClient::Key makeRawKey(void *data, size_t length,
+        CSSM_ALGORITHMS algid, CSSM_KEYUSE usage);
+};
+
+
+#endif //_H_DBCRYPTO