X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/5dd5f9ec28f304ca377c42fd7f711d6cf12b90e1..5c19dc3ae3bd8e40a9c028b0deddd50ff337692c:/OSX/libsecurity_ssl/lib/sslMemory.c

diff --git a/OSX/libsecurity_ssl/lib/sslMemory.c b/OSX/libsecurity_ssl/lib/sslMemory.c
new file mode 100644
index 00000000..831b8861
--- /dev/null
+++ b/OSX/libsecurity_ssl/lib/sslMemory.c
@@ -0,0 +1,248 @@
+/*
+ * 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);
+}
+