+/*
+ * Copyright (c) 1999-2001,2005-2007,2010-2012,2014 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@
+ */
+
+/*
+ * sslMemory.c - Memory allocator implementation
+ */
+
+/* THIS FILE CONTAINS KERNEL CODE */
+
+#include "sslMemory.h"
+#include "sslDebug.h"
+
+#include <string.h> /* memset */
+#include <AssertMacros.h>
+
+// MARK: -
+// MARK: Basic low-level malloc/free
+
+/*
+ * For now, all allocs/frees go thru here.
+ */
+
+#ifdef KERNEL
+
+/* BSD Malloc */
+#include <sys/malloc.h>
+#include <IOKit/IOLib.h>
+#include <libkern/libkern.h>
+
+/* Define this for debugging sslMalloc and sslFree */
+//#define SSL_CANARIS
+
+void *
+sslMalloc(size_t length)
+{
+ void *p;
+
+#ifdef SSL_CANARIS
+ length+=8;
+#endif
+
+ p = _MALLOC(length, M_TEMP, M_WAITOK);
+ check(p);
+
+ if(p==NULL)
+ return p;
+
+#ifdef SSL_CANARIS
+ *(uint32_t *)p=(uint32_t)length-8;
+ printf("sslMalloc @%p of 0x%08lx bytes\n", p, length-8);
+ *(uint32_t *)(p+length-4)=0xdeadbeed;
+ p+=4;
+#endif
+
+ return p;
+}
+
+void
+sslFree(void *p)
+{
+ if(p != NULL) {
+
+#ifdef SSL_CANARIS
+ p=p-4;
+ uint32_t len=*(uint32_t *)p;
+ uint32_t marker=*(uint32_t *)(p+4+len);
+ printf("sslFree @%p len=0x%08x\n", p, len);
+ if(marker!=0xdeadbeef)
+ panic("Buffer overflow in SSL!\n");
+#endif
+
+ _FREE(p, M_TEMP);
+ }
+}
+
+void *
+sslRealloc(void *oldPtr, size_t oldLen, size_t newLen)
+{
+ /* _REALLOC is in sys/malloc.h but is only exported in debug kernel */
+ /* return _REALLOC(oldPtr, newLen, M_TEMP, M_NOWAIT); */
+
+ /* FIXME */
+ void *newPtr;
+ if(newLen>oldLen) {
+ newPtr=sslMalloc(newLen);
+ if(newPtr) {
+ memcpy(newPtr, oldPtr, oldLen);
+ sslFree(oldPtr);
+ }
+ } else {
+ newPtr=oldPtr;
+ }
+ return newPtr;
+}
+
+#else
+
+#include <stdlib.h>
+
+void *
+sslMalloc(size_t length)
+{
+ return malloc(length);
+}
+
+void
+sslFree(void *p)
+{
+ if(p != NULL) {
+ free(p);
+ }
+}
+
+void *
+sslRealloc(void *oldPtr, size_t oldLen, size_t newLen)
+{
+ return realloc(oldPtr, newLen);
+}
+
+#endif
+
+// MARK: -
+// MARK: SSLBuffer-level alloc/free
+
+int SSLAllocBuffer(
+ SSLBuffer *buf,
+ size_t length)
+{
+ buf->data = (uint8_t *)sslMalloc(length);
+ if(buf->data == NULL) {
+ sslErrorLog("SSLAllocBuffer: NULL buf!\n");
+ check(0);
+ buf->length = 0;
+ return -1;
+ }
+ buf->length = length;
+ return 0;
+}
+
+int
+SSLFreeBuffer(SSLBuffer *buf)
+{
+ if(buf == NULL) {
+ sslErrorLog("SSLFreeBuffer: NULL buf!\n");
+ check(0);
+ return -1;
+ }
+ sslFree(buf->data);
+ buf->data = NULL;
+ buf->length = 0;
+ return 0;
+}
+
+int
+SSLReallocBuffer(SSLBuffer *buf, size_t newSize)
+{
+ buf->data = (uint8_t *)sslRealloc(buf->data, buf->length, newSize);
+ if(buf->data == NULL) {
+ sslErrorLog("SSLReallocBuffer: NULL buf!\n");
+ check(0);
+ buf->length = 0;
+ return -1;
+ }
+ buf->length = newSize;
+ return 0;
+}
+
+// MARK: -
+// MARK: Convenience routines
+
+uint8_t *sslAllocCopy(
+ const uint8_t *src,
+ size_t len)
+{
+ uint8_t *dst;
+
+ dst = (uint8_t *)sslMalloc(len);
+ if(dst == NULL) {
+ return NULL;
+ }
+ memmove(dst, src, len);
+ return dst;
+}
+
+int SSLAllocCopyBuffer(
+ const SSLBuffer *src,
+ SSLBuffer **dst) // buffer and data mallocd and returned
+{
+ int serr;
+
+ SSLBuffer *rtn = (SSLBuffer *)sslMalloc(sizeof(SSLBuffer));
+ if(rtn == NULL) {
+ sslErrorLog("SSLAllocCopyBuffer: NULL buf!\n");
+ check(0);
+ return -1;
+ }
+ serr = SSLCopyBuffer(src, rtn);
+ if(serr) {
+ sslFree(rtn);
+ }
+ else {
+ *dst = rtn;
+ }
+ return serr;
+}
+
+int SSLCopyBufferFromData(
+ const void *src,
+ size_t len,
+ SSLBuffer *dst) // data mallocd and returned
+{
+ dst->data = sslAllocCopy((const uint8_t *)src, len);
+ if(dst->data == NULL) {
+ sslErrorLog("SSLCopyBufferFromData: NULL buf!\n");
+ check(0);
+ return -1;
+ }
+ dst->length = len;
+ return 0;
+}
+
+int SSLCopyBuffer(
+ const SSLBuffer *src,
+ SSLBuffer *dst) // data mallocd and returned
+{
+ return SSLCopyBufferFromData(src->data, src->length, dst);
+}
+
projects / apple / security.git / blobdiff