+++ /dev/null
-/*
- * Copyright (c) 2000-2004,2006,2011,2013-2014 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@
- */
-
-
-/*
- * digestobject.h - generic virtual Digest base class
- */
-
-#ifndef _DIGEST_OBJECT_H_
-#define _DIGEST_OBJECT_H_
-
-#include <security_cdsa_utilities/cssmalloc.h>
-
-/* common virtual digest class */
-class DigestObject {
-public:
- DigestObject() : mInitFlag(false), mIsDone(false) { }
- virtual ~DigestObject() { }
-
- /*
- * The remaining functions must be implemented by subclass.
- */
- /* init is reusable */
- virtual void digestInit() = 0;
-
- /* add some data */
- virtual void digestUpdate(
- const void *data,
- size_t len) = 0;
-
- /* obtain digest (once only per init, update, ... cycle) */
- virtual void digestFinal(
- void *digest) = 0; /* RETURNED, alloc'd by caller */
-
- /* sublass-specific copy */
- virtual DigestObject *digestClone() const = 0;
-
- virtual size_t digestSizeInBytes() const = 0;
-
-protected:
- bool mInitFlag;
- bool mIsDone;
-
- bool initFlag() { return mInitFlag; }
- void setInitFlag(bool flag) { mInitFlag = flag; }
- bool isDone() { return mIsDone; }
- void setIsDone(bool done) { mIsDone = done; }
-};
-
-/*
- * NullDigest.h - nop digest for use with raw signature algorithms.
- * NullDigest(someData) = someData.
- */
-class NullDigest : public DigestObject
-{
-public:
- NullDigest() : mInBuf(NULL), mInBufSize(0)
- {
- }
-
- void digestInit()
- {
- /* reusable - reset */
- if(mInBufSize) {
- assert(mInBuf != NULL);
- memset(mInBuf, 0, mInBufSize);
- Allocator::standard().free(mInBuf);
- mInBufSize = 0;
- mInBuf = NULL;
- }
- }
-
- ~NullDigest()
- {
- digestInit();
- }
-
- void digestUpdate(
- const void *data,
- size_t len)
- {
- mInBuf = Allocator::standard().realloc(mInBuf, mInBufSize + len);
- memmove((uint8 *)mInBuf + mInBufSize, data, len);
- mInBufSize += len;
- }
-
- virtual void digestFinal(
- void *digest)
- {
- memmove(digest, mInBuf, mInBufSize);
- }
-
- virtual DigestObject *digestClone() const
- {
- NullDigest *cloned = new NullDigest;
- cloned->digestUpdate(mInBuf, mInBufSize);
- return cloned;
- }
-
- /* unique to NullDigest - just obtain current data ptr, no copy */
- virtual const void *digestPtr() { return mInBuf; }
-
- size_t digestSizeInBytes() const
- {
- return mInBufSize;
- }
-
-private:
- void *mInBuf;
- size_t mInBufSize;
-};
-
-#endif /* _DIGEST_OBJECT_H_ */