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diff --git a/TPM2-Plugin/lib/include/tpm2_hash.h b/TPM2-Plugin/lib/include/tpm2_hash.h
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+//**********************************************************************;
+// Copyright (c) 2017, Intel Corporation
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// 2. 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.
+//
+// 3. Neither the name of Intel 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.
+//**********************************************************************;
+#ifndef SRC_TPM_HASH_H_
+#define SRC_TPM_HASH_H_
+
+#include <stdbool.h>
+
+#include <sapi/tpm20.h>
+
+/**
+ * Hashes a BYTE array via the tpm.
+ * @param sapi_context
+ *  The system api context.
+ * @param hash_alg
+ *  The hashing algorithm to use.
+ * @param hierarchy
+ *  The hierarchy.
+ * @param buffer
+ *  The data to hash.
+ * @param length
+ *  The length of the data.
+ * @param result
+ *  The digest result.
+ * @param validation
+ *  The validation ticket. Note that some hierarchies don't produce a
+ *  validation ticket and thus size will be 0.
+ * @return
+ *  True on success, false otherwise.
+ */
+bool tpm2_hash_compute_data(TSS2_SYS_CONTEXT *sapi_context, TPMI_ALG_HASH halg,
+        TPMI_RH_HIERARCHY hierarchy, BYTE *buffer, UINT16 length,
+        TPM2B_DIGEST *result, TPMT_TK_HASHCHECK *validation);
+
+/**
+ * Hashes a FILE * object via the tpm.
+ * @param sapi_context
+ *  The system api context.
+ * @param hash_alg
+ *  The hashing algorithm to use.
+ * @param hierarchy
+ *  The hierarchy.
+ * @param input
+ *  The FILE object to hash.
+ * @param result
+ *  The digest result.
+ * @param validation
+ *  The validation ticket. Note that some hierarchies don't produce a
+ *  validation ticket and thus size will be 0.
+ * @return
+ *  True on success, false otherwise.
+ */
+bool tpm2_hash_file(TSS2_SYS_CONTEXT *sapi_context, TPMI_ALG_HASH halg,
+        TPMI_RH_HIERARCHY hierarchy, FILE *input, TPM2B_DIGEST *result,
+        TPMT_TK_HASHCHECK *validation);
+
+#endif /* SRC_TPM_HASH_H_ */