X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/Security/libsecurity_apple_csp/lib/ascContext.h

diff --git a/Security/libsecurity_apple_csp/lib/ascContext.h b/Security/libsecurity_apple_csp/lib/ascContext.h
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+/*
+ * Copyright (c) 2001,2011,2013-2014 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@
+ */
+
+
+#ifdef	ASC_CSP_ENABLE
+
+#ifndef _ASC_CONTEXT_H_
+#define _ASC_CONTEXT_H_
+
+#include "AppleCSPContext.h"
+#include <security_comcryption/comcryption.h>
+
+/* symmetric encrypt/decrypt context */
+class ASCContext : public AppleCSPContext {
+public:
+	ASCContext(AppleCSPSession &session) :
+		AppleCSPContext(session),
+		mCcObj(NULL)	{ }
+	~ASCContext();
+	
+	// called by CSPFullPluginSession
+	void init(
+		const Context 	&context, 
+		bool encoding = true);
+	void update(
+		void 			*inp, 
+		size_t 			&inSize, 			// in/out
+		void 			*outp, 
+		size_t 			&outSize);			// in/out
+	void final(
+		CssmData 		&out);
+
+ 	size_t inputSize(
+		size_t 			outSize);			// input for given output size
+	size_t outputSize(
+		bool 			final = false, 
+		size_t 			inSize = 0); 		// output for given input size
+	void minimumProgress(
+		size_t 			&in, 
+		size_t 			&out); 				// minimum progress chunks
+	
+private:
+	comcryptObj			mCcObj;
+	
+	/*
+	 * For first implementation, we have to cope with the fact that the final
+	 * decrypt call down to the comcryption engine requires *some* ciphertext.
+	 * On decrypt, we'll just save one byte on each update in preparation for
+	 * the final call. Hopefull we'll have time to fix deComcryptData() so this
+	 * is unneccesary.
+	 */
+	unsigned char		mDecryptBuf;
+	bool				mDecryptBufValid;
+	
+};	/* RC4Context */
+
+#endif 	/*_ASC_CONTEXT_H_ */
+#endif	/* ASC_CSP_ENABLE */