Adding upstream version 0.9.2.upstream/0.9.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 119 insertions, 0 deletions

diff --git a/src/tpm2/Volatile.c b/src/tpm2/Volatile.c
new file mode 100644
index 0000000..ff15c7f
--- /dev/null
+++ b/src/tpm2/Volatile.c
@@ -0,0 +1,119 @@
+/********************************************************************************/
+/*										*/
+/*			  Marshalling and unmarshalling of state		*/
+/*			     Written by Stefan Berger				*/
+/*		       IBM Thomas J. Watson Research Center			*/
+/*										*/
+/* (c) Copyright IBM Corporation 2017,2018.					*/
+/*										*/
+/* 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.		*/
+/********************************************************************************/
+
+#if defined __FreeBSD__ || defined __DragonFly__
+# include <sys/endian.h>
+#elif defined __APPLE__
+# include <libkern/OSByteOrder.h>
+#else
+# include <endian.h>
+#endif
+#include <string.h>
+
+#include "config.h"
+
+#include "assert.h"
+#include "NVMarshal.h"
+#include "Volatile.h"
+
+#define TPM_HAVE_TPM2_DECLARATIONS
+#include "tpm_library_intern.h"
+
+TPM_RC
+VolatileState_Load(BYTE **buffer, INT32 *size)
+{
+    TPM_RC rc = TPM_RC_SUCCESS;
+    BYTE hash[SHA1_DIGEST_SIZE], acthash[SHA1_DIGEST_SIZE];
+    UINT16 hashAlg = TPM_ALG_SHA1;
+
+    if (rc == TPM_RC_SUCCESS) {
+        if ((UINT32)*size < sizeof(hash))
+            return TPM_RC_INSUFFICIENT;
+
+        CryptHashBlock(hashAlg, *size - sizeof(hash), *buffer,
+                       sizeof(acthash), acthash);
+        rc = VolatileState_Unmarshal(buffer, size);
+        /* specific error has already been reported */
+    }
+
+    if (rc == TPM_RC_SUCCESS) {
+        /*
+         * advance pointer towards hash if we have a later version of
+         * the state that has extra data we didn't read
+         */
+        if (*size > 0 && (UINT32)*size > sizeof(hash)) {
+            *buffer += *size - sizeof(hash);
+            *size = sizeof(hash);
+        }
+        rc = Array_Unmarshal(hash, sizeof(hash), buffer, size);
+        if (rc != TPM_RC_SUCCESS)
+            TPMLIB_LogTPM2Error("Error unmarshalling volatile state hash: "
+                                "0x%02x\n", rc);
+    }
+
+    if (rc == TPM_RC_SUCCESS) {
+        if (memcmp(acthash, hash, sizeof(hash))) {
+            rc = TPM_RC_HASH;
+            TPMLIB_LogTPM2Error("Volatile state checksum error: 0x%02x\n",
+                                rc);
+        }
+    }
+
+    if (rc != TPM_RC_SUCCESS)
+        g_inFailureMode = TRUE;
+
+    return rc;
+}
+
+UINT16
+VolatileState_Save(BYTE **buffer, INT32 *size)
+{
+    UINT16 written;
+    const BYTE *start;
+    BYTE hash[SHA1_DIGEST_SIZE];
+    TPM_ALG_ID hashAlg = TPM_ALG_SHA1;
+
+    start = *buffer;
+    written = VolatileState_Marshal(buffer, size);
+
+    /* append the checksum */
+    CryptHashBlock(hashAlg, written, start, sizeof(hash), hash);
+    written += Array_Marshal(hash, sizeof(hash), buffer, size);
+
+    return written;
+}