diff --git a/include/hardware/keymaster0.h b/include/hardware/keymaster0.h
new file mode 100644
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--- /dev/null
+++ b/include/hardware/keymaster0.h
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_HARDWARE_KEYMASTER_0_H
+#define ANDROID_HARDWARE_KEYMASTER_0_H
+
+#include <hardware/keymaster_common.h>
+
+__BEGIN_DECLS
+
+/**
+ * Keymaster0 device definition.
+ */
+struct keymaster0_device {
+    /**
+     * Common methods of the keymaster device.  This *must* be the first member of
+     * keymaster0_device as users of this structure will cast a hw_device_t to
+     * keymaster0_device pointer in contexts where it's known the hw_device_t references a
+     * keymaster0_device.
+     */
+    struct hw_device_t common;
+
+    /**
+     * THIS IS DEPRECATED. Use the new "module_api_version" and "hal_api_version"
+     * fields in the keymaster_module initialization instead.
+     */
+    uint32_t client_version;
+
+    /**
+     * See flags defined for keymaster0_device::flags in keymaster_common.h
+     */
+    uint32_t flags;
+
+    void* context;
+
+    /**
+     * Generates a public and private key. The key-blob returned is opaque
+     * and must subsequently provided for signing and verification.
+     *
+     * Returns: 0 on success or an error code less than 0.
+     */
+    int (*generate_keypair)(const struct keymaster0_device* dev,
+            const keymaster_keypair_t key_type, const void* key_params,
+            uint8_t** key_blob, size_t* key_blob_length);
+
+    /**
+     * Imports a public and private key pair. The imported keys will be in
+     * PKCS#8 format with DER encoding (Java standard). The key-blob
+     * returned is opaque and will be subsequently provided for signing
+     * and verification.
+     *
+     * Returns: 0 on success or an error code less than 0.
+     */
+    int (*import_keypair)(const struct keymaster0_device* dev,
+            const uint8_t* key, const size_t key_length,
+            uint8_t** key_blob, size_t* key_blob_length);
+
+    /**
+     * Gets the public key part of a key pair. The public key must be in
+     * X.509 format (Java standard) encoded byte array.
+     *
+     * Returns: 0 on success or an error code less than 0.
+     * On error, x509_data should not be allocated.
+     */
+    int (*get_keypair_public)(const struct keymaster0_device* dev,
+            const uint8_t* key_blob, const size_t key_blob_length,
+            uint8_t** x509_data, size_t* x509_data_length);
+
+    /**
+     * Deletes the key pair associated with the key blob.
+     *
+     * This function is optional and should be set to NULL if it is not
+     * implemented.
+     *
+     * Returns 0 on success or an error code less than 0.
+     */
+    int (*delete_keypair)(const struct keymaster0_device* dev,
+            const uint8_t* key_blob, const size_t key_blob_length);
+
+    /**
+     * Deletes all keys in the hardware keystore. Used when keystore is
+     * reset completely.
+     *
+     * This function is optional and should be set to NULL if it is not
+     * implemented.
+     *
+     * Returns 0 on success or an error code less than 0.
+     */
+    int (*delete_all)(const struct keymaster0_device* dev);
+
+    /**
+     * Signs data using a key-blob generated before. This can use either
+     * an asymmetric key or a secret key.
+     *
+     * Returns: 0 on success or an error code less than 0.
+     */
+    int (*sign_data)(const struct keymaster0_device* dev,
+            const void* signing_params,
+            const uint8_t* key_blob, const size_t key_blob_length,
+            const uint8_t* data, const size_t data_length,
+            uint8_t** signed_data, size_t* signed_data_length);
+
+    /**
+     * Verifies data signed with a key-blob. This can use either
+     * an asymmetric key or a secret key.
+     *
+     * Returns: 0 on successful verification or an error code less than 0.
+     */
+    int (*verify_data)(const struct keymaster0_device* dev,
+            const void* signing_params,
+            const uint8_t* key_blob, const size_t key_blob_length,
+            const uint8_t* signed_data, const size_t signed_data_length,
+            const uint8_t* signature, const size_t signature_length);
+};
+typedef struct keymaster0_device keymaster0_device_t;
+
+
+/* Convenience API for opening and closing keymaster devices */
+
+static inline int keymaster0_open(const struct hw_module_t* module,
+        keymaster0_device_t** device)
+{
+    int rc = module->methods->open(module, KEYSTORE_KEYMASTER,
+            (struct hw_device_t**) device);
+
+    return rc;
+}
+
+static inline int keymaster0_close(keymaster0_device_t* device)
+{
+    return device->common.close(&device->common);
+}
+
+__END_DECLS
+
+#endif  // ANDROID_HARDWARE_KEYMASTER_0_H