Security-55163.44.tar.gz

[apple/security.git] / libsecurity_ssl / lib / sslMemory.c

diff --git a/libsecurity_ssl/lib/sslMemory.c b/libsecurity_ssl/lib/sslMemory.c
new file mode 100644 (file)
index 0000000..e56afbd
--- /dev/null
+++ b/libsecurity_ssl/lib/sslMemory.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 1999-2001,2005-2007,2010-2012 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
+ */
+
+#include "sslMemory.h"
+#include "sslContext.h"
+#include "sslDebug.h"
+
+#pragma mark -
+#pragma mark Basic low-level malloc/free
+
+/*
+ * For now, all allocs/frees go thru here.
+ */
+#include <string.h>                    /* memset */
+#include <stdlib.h>
+
+void *
+sslMalloc(size_t length)
+{
+       return malloc(length);
+}
+
+void
+sslFree(void *p)
+{
+       if(p != nil) {
+               free(p);
+       }
+}
+
+void *
+sslRealloc(void *oldPtr, size_t oldLen, size_t newLen)
+{
+       return realloc(oldPtr, newLen);
+}
+
+#pragma mark -
+#pragma mark SSLBuffer-level alloc/free
+
+OSStatus SSLAllocBuffer(
+       SSLBuffer *buf,
+       size_t length,
+       const SSLContext *ctx)                  // currently unused
+{
+       buf->data = (UInt8 *)sslMalloc(length);
+       if(buf->data == NULL) {
+               buf->length = 0;
+               return memFullErr;
+       }
+    buf->length = length;
+    return noErr;
+}
+
+OSStatus
+SSLFreeBuffer(SSLBuffer *buf, const SSLContext *ctx)
+{
+       if(buf == NULL) {
+               sslErrorLog("SSLFreeBuffer: NULL buf!\n");
+               return errSSLInternal;
+       }
+    sslFree(buf->data);
+    buf->data = NULL;
+    buf->length = 0;
+    return noErr;
+}
+
+OSStatus
+SSLReallocBuffer(SSLBuffer *buf, size_t newSize, const SSLContext *ctx)
+{
+       buf->data = (UInt8 *)sslRealloc(buf->data, buf->length, newSize);
+       if(buf->data == NULL) {
+               buf->length = 0;
+               return memFullErr;
+       }
+       buf->length = newSize;
+       return noErr;
+}
+
+#pragma mark -
+#pragma mark Convenience routines
+
+UInt8 *sslAllocCopy(
+       const UInt8 *src,
+       size_t len)
+{
+       UInt8 *dst;
+
+       dst = (UInt8 *)sslMalloc(len);
+       if(dst == NULL) {
+               return NULL;
+       }
+       memmove(dst, src, len);
+       return dst;
+}
+
+OSStatus SSLAllocCopyBuffer(
+       const SSLBuffer *src,
+       SSLBuffer **dst)                // buffer and data mallocd and returned
+{
+       OSStatus serr;
+
+       SSLBuffer *rtn = (SSLBuffer *)sslMalloc(sizeof(SSLBuffer));
+       if(rtn == NULL) {
+               return memFullErr;
+       }
+       serr = SSLCopyBuffer(src, rtn);
+       if(serr) {
+               sslFree(rtn);
+       }
+       else {
+               *dst = rtn;
+       }
+       return serr;
+}
+
+OSStatus SSLCopyBufferFromData(
+       const void *src,
+       size_t len,
+       SSLBuffer *dst)         // data mallocd and returned
+{
+       dst->data = sslAllocCopy((const UInt8 *)src, len);
+       if(dst->data == NULL) {
+               return memFullErr;
+       }
+    dst->length = len;
+    return noErr;
+}
+
+OSStatus SSLCopyBuffer(
+       const SSLBuffer *src,
+       SSLBuffer *dst)         // data mallocd and returned
+{
+       return SSLCopyBufferFromData(src->data, src->length, dst);
+}
+