diff --git a/ext/nrf/cc310_glue.h b/ext/nrf/cc310_glue.h
new file mode 100644
index 0000000..db34c34
--- /dev/null
+++ b/ext/nrf/cc310_glue.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2019 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
+ */
+#ifndef NRF_CC310_GLUE_H__
+#define NRF_CC310_GLUE_H__
+
+#include <nrf.h>
+#include <nrf_cc310_bl_init.h>
+#include <nrf_cc310_bl_hash_sha256.h>
+#include <nrf_cc310_bl_ecdsa_verify_secp256r1.h>
+#include <generated_dts_board.h>
+#include <string.h>
+
+typedef nrf_cc310_bl_hash_context_sha256_t bootutil_sha256_context;
+
+int cc310_ecdsa_verify_secp256r1(uint8_t *hash,
+                                 uint8_t *public_key,
+                                 uint8_t *signature,
+                                 size_t hash_len);
+
+
+int cc310_init(void);
+
+static inline void cc310_sha256_init(nrf_cc310_bl_hash_context_sha256_t *ctx);
+
+void cc310_sha256_update(nrf_cc310_bl_hash_context_sha256_t *ctx,
+                         const void *data,
+                         uint32_t data_len);
+
+static inline void nrf_cc310_enable(void)
+{
+    NRF_CRYPTOCELL->ENABLE=1;
+}
+
+static inline void nrf_cc310_disable(void)
+{
+    NRF_CRYPTOCELL->ENABLE=1;
+}
+
+/* Enable and disable cc310 to reduce power consumption */
+static inline void cc310_sha256_init(nrf_cc310_bl_hash_context_sha256_t * ctx)
+{
+    cc310_init();
+    nrf_cc310_enable();
+    nrf_cc310_bl_hash_sha256_init(ctx);
+}
+
+static inline void cc310_sha256_finalize(bootutil_sha256_context *ctx,
+                                          uint8_t *output)
+{
+    nrf_cc310_bl_hash_sha256_finalize(ctx,
+                                      (nrf_cc310_bl_hash_digest_sha256_t *)output);
+    nrf_cc310_disable();
+}
+
+#endif /* NRF_CC310_GLUE_H__ */