1 files changed, 49 insertions, 0 deletions
diff --git a/firmware/include/tpm2_marshaling.h b/firmware/include/tpm2_marshaling.h
new file mode 100644
index 00000000..c72b076b
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+++ b/firmware/include/tpm2_marshaling.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2016 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef __SRC_LIB_TPM2_MARSHALING_H
+#define __SRC_LIB_TPM2_MARSHALING_H
+
+#include "tss_constants.h"
+
+/* The below functions are used to serialize/deserialize TPM2 commands. */
+
+/**
+ * tpm_marshal_command
+ *
+ * Given a structure containing a TPM2 command, serialize the structure for
+ * sending it to the TPM.
+ *
+ * @command: code of the TPM2 command to marshal
+ * @tpm_command_body: a pointer to the command specific structure
+ * @buffer: buffer where command is marshaled to
+ * @buffer_size: size of the buffer
+ *
+ * Returns number of bytes placed in the buffer, or -1 on error.
+ *
+ */
+int tpm_marshal_command(TPM_CC command, void *tpm_command_body,
+			void *buffer, int buffer_size);
+
+/**
+ * tpm_unmarshal_response
+ *
+ * Given a buffer received from the TPM in response to a certain command,
+ * deserialize the buffer into the expeced response structure.
+ *
+ * struct tpm2_response is a union of all possible responses.
+ *
+ * @command: code of the TPM2 command for which a response is unmarshaled
+ * @response_body: buffer containing the serialized response.
+ * @response_size: number of bytes in the buffer containing response
+ *
+ * Returns a pointer to the deserialized response or NULL in case of
+ * unmarshaling problems.
+ */
+struct tpm2_response *tpm_unmarshal_response(TPM_CC command,
+					     void *response_body,
+					     int response_size);
+
+#endif // __SRC_LIB_TPM2_MARSHALING_H