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-rw-r--r--src/tpm12/tpm_load.c309
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diff --git a/src/tpm12/tpm_load.c b/src/tpm12/tpm_load.c
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+/********************************************************************************/
+/* */
+/* Load from Stream Utilities */
+/* Written by Ken Goldman */
+/* IBM Thomas J. Watson Research Center */
+/* $Id: tpm_load.c 4668 2012-01-25 21:16:48Z 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. */
+/********************************************************************************/
+
+/* Generally useful utilities to deserialize structures from a stream */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "tpm_debug.h"
+#include "tpm_error.h"
+#include "tpm_sizedbuffer.h"
+#include "tpm_types.h"
+
+#include "tpm_load.h"
+
+/* The LOADn() functions convert a big endian stream to integer types */
+
+uint32_t LOAD32(const unsigned char *buffer, unsigned int offset)
+{
+ unsigned int i;
+ uint32_t result = 0;
+
+ for (i = 0 ; i < 4 ; i++) {
+ result <<= 8;
+ result |= buffer[offset + i];
+ }
+ return result;
+}
+
+uint16_t LOAD16(const unsigned char *buffer, unsigned int offset)
+{
+ unsigned int i;
+ uint16_t result = 0;
+
+ for (i = 0 ; i < 2 ; i++) {
+ result <<= 8;
+ result |= buffer[offset + i];
+ }
+ return result;
+}
+
+uint8_t LOAD8(const unsigned char *buffer, unsigned int offset)
+{
+ uint8_t result = 0;
+
+ result |= buffer[offset];
+ return result;
+}
+
+/* TPM_Load32() loads 'tpm_uint32' from the stream.
+
+ It checks that the stream has sufficient data, and adjusts 'stream'
+ and 'stream_size' past the data.
+*/
+
+TPM_RESULT TPM_Load32(uint32_t *tpm_uint32,
+ unsigned char **stream,
+ uint32_t *stream_size)
+{
+ TPM_RESULT rc = 0;
+
+ /* check stream_size */
+ if (rc == 0) {
+ if (*stream_size < sizeof(uint32_t)) {
+ printf("TPM_Load32: Error, stream_size %u less than %lu\n",
+ *stream_size, (unsigned long)sizeof(uint32_t));
+ rc = TPM_BAD_PARAM_SIZE;
+ }
+ }
+ /* load the parameter */
+ if (rc == 0) {
+ *tpm_uint32 = LOAD32(*stream, 0);
+ *stream += sizeof (uint32_t);
+ *stream_size -= sizeof (uint32_t);
+ }
+ return rc;
+}
+
+/* TPM_Load16() loads 'tpm_uint16' from the stream.
+
+ It checks that the stream has sufficient data, and adjusts 'stream'
+ and 'stream_size' past the data.
+*/
+
+TPM_RESULT TPM_Load16(uint16_t *tpm_uint16,
+ unsigned char **stream,
+ uint32_t *stream_size)
+{
+ TPM_RESULT rc = 0;
+
+ /* check stream_size */
+ if (rc == 0) {
+ if (*stream_size < sizeof(uint16_t)) {
+ printf("TPM_Load16: Error, stream_size %u less than %lu\n",
+ *stream_size, (unsigned long)sizeof(uint16_t));
+ rc = TPM_BAD_PARAM_SIZE;
+ }
+ }
+ /* load the parameter */
+ if (rc == 0) {
+ *tpm_uint16 = LOAD16(*stream, 0);
+ *stream += sizeof (uint16_t);
+ *stream_size -= sizeof (uint16_t);
+ }
+ return rc;
+}
+
+TPM_RESULT TPM_Load8(uint8_t *tpm_uint8,
+ unsigned char **stream,
+ uint32_t *stream_size)
+{
+ TPM_RESULT rc = 0;
+ /* check stream_size */
+ if (rc == 0) {
+ if (*stream_size < sizeof(uint8_t)) {
+ printf("TPM_Load8: Error, stream_size %u less than %lu\n",
+ *stream_size, (unsigned long)sizeof(uint8_t));
+ rc = TPM_BAD_PARAM_SIZE;
+ }
+ }
+ /* load the parameter */
+ if (rc == 0) {
+ *tpm_uint8 = LOAD8(*stream, 0);
+ *stream += sizeof (uint8_t);
+ *stream_size -= sizeof (uint8_t);
+ }
+ return rc;
+}
+
+/* Boolean incoming parameter values other than 0x00 and 0x01 have an implementation specific
+ interpretation. The TPM SHOULD return TPM_BAD_PARAMETER.
+*/
+
+TPM_RESULT TPM_LoadBool(TPM_BOOL *tpm_bool,
+ unsigned char **stream,
+ uint32_t *stream_size)
+{
+ TPM_RESULT rc = 0;
+ /* check stream_size */
+ if (rc == 0) {
+ if (*stream_size < sizeof(TPM_BOOL)) {
+ printf("TPM_LoadBool: Error, stream_size %u less than %lu\n",
+ *stream_size, (unsigned long)sizeof(TPM_BOOL));
+ rc = TPM_BAD_PARAM_SIZE;
+ }
+ }
+ /* load the parameter */
+ if (rc == 0) {
+ *tpm_bool = LOAD8(*stream, 0);
+ *stream += sizeof (uint8_t);
+ *stream_size -= sizeof (uint8_t);
+ }
+ if (rc == 0) {
+ if ((*tpm_bool != TRUE) && (*tpm_bool != FALSE)) {
+ printf("TPM_LoadBool: Error, illegal value %02x\n", *tpm_bool);
+ rc = TPM_BAD_PARAMETER;
+ }
+ }
+ return rc;
+}
+
+/* TPM_Loadn() copies 'data_length' bytes from 'stream' to 'data' with
+ no endian adjustments. */
+
+TPM_RESULT TPM_Loadn(BYTE *data,
+ size_t data_length,
+ unsigned char **stream,
+ uint32_t *stream_size)
+{
+ TPM_RESULT rc = 0;
+ /* check stream_size */
+ if (rc == 0) {
+ if (*stream_size < data_length) {
+ printf("TPM_Loadn: Error, stream_size %u less than %lu\n",
+ *stream_size, (unsigned long)data_length);
+ rc = TPM_BAD_PARAM_SIZE;
+ }
+ }
+ /* load the parameter */
+ if (rc == 0) {
+ memcpy(data, *stream, data_length);
+ *stream += data_length;
+ *stream_size -= data_length;
+ }
+ return rc;
+}
+
+/* TPM_LoadLong() creates a long from a stream in network byte order.
+
+ The stream is not advanced.
+*/
+
+TPM_RESULT TPM_LoadLong(unsigned long *result,
+ const unsigned char *stream,
+ uint32_t stream_size)
+{
+ TPM_RESULT rc = 0;
+ size_t i; /* byte iterator */
+
+ printf(" TPM_LoadLong:\n");
+ if (rc == 0) {
+ if (stream_size > sizeof(unsigned long)) {
+ printf(" TPM_LoadLong: Error, stream size %u too large\n", stream_size);
+ rc = TPM_BAD_PARAM_SIZE;
+ }
+ }
+ if (rc == 0) {
+ *result = 0; /* initialize all bytes to 0 in case buffer is less than sizeof(unsigned
+ long) bytes */
+ for (i = 0 ; i < stream_size ; i++) {
+ /* copy big endian stream, put lowest address in an upper byte, highest address in byte
+ 0 */
+ *result |= (unsigned long)(((unsigned long)stream[i]) << ((stream_size - 1 - i) * 8));
+ }
+ printf(" TPM_LoadLong: Result %08lx\n", *result);
+ }
+ return rc;
+}
+
+#if 0
+/* TPM_LoadString() returns a pointer to a C string. It does not copy the string.
+
+ */
+
+TPM_RESULT TPM_LoadString(const char **name,
+ unsigned char **stream,
+ uint32_t *stream_size)
+{
+ TPM_RESULT rc = 0;
+ char *ptr;
+
+ *name = NULL;
+ /* search for the first nul character */
+ if (rc == 0) {
+ ptr = memchr(*stream, (int)'\0', *stream_size);
+ if (ptr == NULL) {
+ rc = TPM_BAD_PARAM_SIZE;
+ }
+ }
+ if (rc == 0) {
+ *name = (char *)*stream; /* cast because converting binary to string */
+ *stream_size -= (ptr - *name) + 1;
+ *stream = (unsigned char *)ptr + 1;
+ }
+ return rc;
+}
+#endif
+
+/* TPM_CheckTag() loads a TPM_STRUCTURE_TAG from 'stream'. It check that the value is 'expectedTag'
+ and returns TPM_INVALID_STRUCTURE on error.
+
+*/
+
+TPM_RESULT TPM_CheckTag(TPM_STRUCTURE_TAG expectedTag,
+ unsigned char **stream,
+ uint32_t *stream_size)
+{
+ TPM_RESULT rc = 0;
+ TPM_STRUCTURE_TAG tag;
+
+ if (rc == 0) {
+ rc = TPM_Load16(&tag, stream, stream_size);
+ }
+ if (rc == 0) {
+ if (tag != expectedTag) {
+ printf("TPM_CheckTag: Error, tag expected %04x found %04hx\n", expectedTag, tag);
+ rc = TPM_INVALID_STRUCTURE;
+ }
+ }
+ return rc;
+}
+
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