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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 21:41:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 21:41:43 +0000
commit92cccad89d1c12b39165d5f0ed7ccd2d44965a1a (patch)
treef59a2764cd8c50959050a428bd8fc935138df750 /src/tpm_memory.c
parentInitial commit. (diff)
downloadlibtpms-92cccad89d1c12b39165d5f0ed7ccd2d44965a1a.tar.xz
libtpms-92cccad89d1c12b39165d5f0ed7ccd2d44965a1a.zip
Adding upstream version 0.9.2.upstream/0.9.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/tpm_memory.c')
-rw-r--r--src/tpm_memory.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/src/tpm_memory.c b/src/tpm_memory.c
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+/********************************************************************************/
+/* */
+/* TPM Memory Allocation */
+/* Written by Ken Goldman */
+/* IBM Thomas J. Watson Research Center */
+/* $Id: tpm_memory.c 4609 2011-08-26 19:27:38Z kgoldman $ */
+/* */
+/* (c) Copyright IBM Corporation 2006, 2010. */
+/* */
+/* All rights reserved. */
+/* */
+/* Redistribution and use in source and binary forms, with or without */
+/* modification, are permitted provided that the following conditions are */
+/* met: */
+/* */
+/* Redistributions of source code must retain the above copyright notice, */
+/* this list of conditions and the following disclaimer. */
+/* */
+/* Redistributions in binary form must reproduce the above copyright */
+/* notice, this list of conditions and the following disclaimer in the */
+/* documentation and/or other materials provided with the distribution. */
+/* */
+/* Neither the names of the IBM Corporation nor the names of its */
+/* contributors may be used to endorse or promote products derived from */
+/* this software without specific prior written permission. */
+/* */
+/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
+/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
+/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
+/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
+/* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
+/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
+/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */
+/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY */
+/* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
+/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
+/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+/********************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "tpm_debug.h"
+#include "tpm_error.h"
+
+#include "tpm_memory.h"
+
+/* TPM_Malloc() is a general purpose wrapper around malloc()
+ */
+
+TPM_RESULT TPM_Malloc(unsigned char **buffer, uint32_t size)
+{
+ TPM_RESULT rc = 0;
+
+ /* assertion test. The coding style requires that all allocated pointers are initialized to
+ NULL. A non-NULL value indicates either a missing initialization or a pointer reuse (a
+ memory leak). */
+ if (rc == 0) {
+ if (*buffer != NULL) {
+ printf("TPM_Malloc: Error (fatal), *buffer %p should be NULL before malloc\n", *buffer);
+ rc = TPM_FAIL;
+ }
+ }
+ /* verify that the size is not "too large" */
+ if (rc == 0) {
+ if (size > TPM_ALLOC_MAX) {
+ printf("TPM_Malloc: Error, size %u greater than maximum allowed\n", size);
+ rc = TPM_SIZE;
+ }
+ }
+ /* verify that the size is not 0, this would be implementation defined and should never occur */
+ if (rc == 0) {
+ if (size == 0) {
+ printf("TPM_Malloc: Error (fatal), size is zero\n");
+ rc = TPM_FAIL;
+ }
+ }
+ if (rc == 0) {
+ *buffer = malloc(size);
+ if (*buffer == NULL) {
+ printf("TPM_Malloc: Error allocating %u bytes\n", size);
+ rc = TPM_SIZE;
+ }
+ }
+ return rc;
+}
+
+/* TPM_Realloc() is a general purpose wrapper around realloc()
+ */
+
+TPM_RESULT TPM_Realloc(unsigned char **buffer,
+ uint32_t size)
+{
+ TPM_RESULT rc = 0;
+ unsigned char *tmpptr = NULL;
+
+ /* verify that the size is not "too large" */
+ if (rc == 0) {
+ if (size > TPM_ALLOC_MAX) {
+ printf("TPM_Realloc: Error, size %u greater than maximum allowed\n", size);
+ rc = TPM_SIZE;
+ }
+ }
+ if (rc == 0) {
+ tmpptr = realloc(*buffer, size);
+ if (tmpptr == NULL) {
+ printf("TPM_Realloc: Error reallocating %u bytes\n", size);
+ rc = TPM_SIZE;
+ }
+ }
+ if (rc == 0) {
+ *buffer = tmpptr;
+ }
+ return rc;
+}
+
+/* TPM_Free() is the companion to the TPM allocation functions. It is not used internally. The
+ intent is for use by an application that links directly to a TPM and wants to free memory
+ allocated by the TPM.
+
+ It avoids a potential problem if the application uses a different allocation library, perhaps one
+ that wraps the functions to detect overflows or memory leaks.
+*/
+
+void TPM_Free(unsigned char *buffer)
+{
+ free(buffer);
+ return;
+}
+