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-rw-r--r--src/tpm12/tpm_nonce.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/src/tpm12/tpm_nonce.c b/src/tpm12/tpm_nonce.c
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+++ b/src/tpm12/tpm_nonce.c
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+/********************************************************************************/
+/* */
+/* Nonce Handler */
+/* Written by Ken Goldman */
+/* IBM Thomas J. Watson Research Center */
+/* $Id: tpm_nonce.c 4071 2010-04-29 19:26:45Z 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 <string.h>
+
+#include "tpm_crypto.h"
+#include "tpm_debug.h"
+#include "tpm_error.h"
+#include "tpm_structures.h"
+
+#include "tpm_nonce.h"
+
+/* TPM_Nonce_Init resets a nonce structure to zeros */
+
+void TPM_Nonce_Init(TPM_NONCE tpm_nonce)
+{
+ size_t i;
+
+ printf(" TPM_Nonce_Init:\n");
+ for (i = 0 ; i < TPM_NONCE_SIZE ; i++) {
+ tpm_nonce[i] = 0;
+ }
+ return;
+}
+
+/* TPM_Nonce_Load()
+
+ deserialize the structure from a 'stream'
+ 'stream_size' is checked for sufficient data
+ returns 0 or error codes
+*/
+
+
+TPM_RESULT TPM_Nonce_Load(TPM_NONCE tpm_nonce,
+ unsigned char **stream,
+ uint32_t *stream_size)
+{
+ TPM_RESULT rc = 0;
+
+ printf(" TPM_Nonce_Load:\n");
+ rc = TPM_Loadn(tpm_nonce, TPM_NONCE_SIZE, stream, stream_size);
+ return rc;
+}
+
+/* TPM_Nonce_Store()
+
+ serialize the structure to a stream contained in 'sbuffer'
+ returns 0 or error codes
+
+ After use, call TPM_Sbuffer_Delete() to free memory
+*/
+
+TPM_RESULT TPM_Nonce_Store(TPM_STORE_BUFFER *sbuffer,
+ const TPM_NONCE tpm_nonce)
+{
+ TPM_RESULT rc = 0;
+
+ printf(" TPM_Nonce_Store:\n");
+ rc = TPM_Sbuffer_Append(sbuffer, tpm_nonce, TPM_NONCE_SIZE);
+ return rc;
+}
+
+/* TPM_Nonce_Copy() copies the source to the destination
+ */
+
+void TPM_Nonce_Copy(TPM_NONCE destination, const TPM_NONCE source)
+{
+ printf(" TPM_Nonce_Copy:\n");
+ memcpy(destination, source, TPM_NONCE_SIZE);
+ return;
+}
+
+/* TPM_Nonce_Compare() compares the source to the destination.
+
+ Returns TPM_AUTHFAIL if the nonces are not equal
+*/
+
+TPM_RESULT TPM_Nonce_Compare(TPM_NONCE expect, const TPM_NONCE actual)
+{
+ TPM_RESULT rc = 0;
+
+ printf(" TPM_Nonce_Compare:\n");
+ rc = memcmp(expect, actual, TPM_NONCE_SIZE);
+ if (rc != 0) {
+ printf("TPM_Nonce_Compare: Error comparing nonce\n");
+ TPM_PrintFour(" TPM_Nonce_Compare: Expect", expect);
+ TPM_PrintFour(" TPM_Nonce_Compare: Actual", actual);
+ rc = TPM_AUTHFAIL;
+ }
+ return rc;
+}
+
+/* TPM_Nonce_Generate() generates a new nonce from the random number generator
+ */
+
+TPM_RESULT TPM_Nonce_Generate(TPM_NONCE tpm_nonce)
+{
+ TPM_RESULT rc = 0;
+
+ printf(" TPM_Nonce_Generate:\n");
+ rc = TPM_Random(tpm_nonce, TPM_NONCE_SIZE);
+ return rc;
+}
+
+/* TPM_Nonce_IsZero() returns 'isZero' TRUE is all bytes 'tpm_nonce' are 0x00
+ */
+
+void TPM_Nonce_IsZero(TPM_BOOL *isZero, TPM_NONCE tpm_nonce)
+{
+ size_t i;
+
+ printf(" TPM_Nonce_IsZero:\n");
+ for (i = 0, *isZero = TRUE ; (i < TPM_NONCE_SIZE) && *isZero ; i++) {
+ if (tpm_nonce[i] != 0) {
+ *isZero = FALSE;
+ }
+ }
+ return;
+}
+