diff --git a/include/mbedcrypto/sha512.h b/include/mbedcrypto/sha512.h
new file mode 100644
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+++ b/include/mbedcrypto/sha512.h
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+/**
+ * \file sha512.h
+ * \brief This file contains SHA-384 and SHA-512 definitions and functions.
+ *
+ * The Secure Hash Algorithms 384 and 512 (SHA-384 and SHA-512) cryptographic
+ * hash functions are defined in <em>FIPS 180-4: Secure Hash Standard (SHS)</em>.
+ */
+/*
+ *  Copyright (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  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.
+ *
+ *  This file is part of Mbed Crypto (https://tls.mbed.org)
+ */
+#ifndef MBEDCRYPTO_SHA512_H
+#define MBEDCRYPTO_SHA512_H
+
+#if !defined(MBEDCRYPTO_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDCRYPTO_CONFIG_FILE
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define MBEDCRYPTO_ERR_SHA512_HW_ACCEL_FAILED                -0x0039  /**< SHA-512 hardware accelerator failed */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(MBEDCRYPTO_SHA512_ALT)
+// Regular implementation
+//
+
+/**
+ * \brief          The SHA-512 context structure.
+ *
+ *                 The structure is used both for SHA-384 and for SHA-512
+ *                 checksum calculations. The choice between these two is
+ *                 made in the call to mbedcrypto_sha512_starts_ret().
+ */
+typedef struct
+{
+    uint64_t total[2];          /*!< The number of Bytes processed. */
+    uint64_t state[8];          /*!< The intermediate digest state. */
+    unsigned char buffer[128];  /*!< The data block being processed. */
+    int is384;                  /*!< Determines which function to use:
+                                     0: Use SHA-512, or 1: Use SHA-384. */
+}
+mbedcrypto_sha512_context;
+
+#else  /* MBEDCRYPTO_SHA512_ALT */
+#include "sha512_alt.h"
+#endif /* MBEDCRYPTO_SHA512_ALT */
+
+/**
+ * \brief          This function initializes a SHA-512 context.
+ *
+ * \param ctx      The SHA-512 context to initialize.
+ */
+void mbedcrypto_sha512_init( mbedcrypto_sha512_context *ctx );
+
+/**
+ * \brief          This function clears a SHA-512 context.
+ *
+ * \param ctx      The SHA-512 context to clear.
+ */
+void mbedcrypto_sha512_free( mbedcrypto_sha512_context *ctx );
+
+/**
+ * \brief          This function clones the state of a SHA-512 context.
+ *
+ * \param dst      The destination context.
+ * \param src      The context to clone.
+ */
+void mbedcrypto_sha512_clone( mbedcrypto_sha512_context *dst,
+                           const mbedcrypto_sha512_context *src );
+
+/**
+ * \brief          This function starts a SHA-384 or SHA-512 checksum
+ *                 calculation.
+ *
+ * \param ctx      The SHA-512 context to initialize.
+ * \param is384    Determines which function to use:
+ *                 0: Use SHA-512, or 1: Use SHA-384.
+ *
+ * \return         \c 0 on success.
+ */
+int mbedcrypto_sha512_starts_ret( mbedcrypto_sha512_context *ctx, int is384 );
+
+/**
+ * \brief          This function feeds an input buffer into an ongoing
+ *                 SHA-512 checksum calculation.
+ *
+ * \param ctx      The SHA-512 context.
+ * \param input    The buffer holding the input data.
+ * \param ilen     The length of the input data.
+ *
+ * \return         \c 0 on success.
+ */
+int mbedcrypto_sha512_update_ret( mbedcrypto_sha512_context *ctx,
+                    const unsigned char *input,
+                    size_t ilen );
+
+/**
+ * \brief          This function finishes the SHA-512 operation, and writes
+ *                 the result to the output buffer. This function is for
+ *                 internal use only.
+ *
+ * \param ctx      The SHA-512 context.
+ * \param output   The SHA-384 or SHA-512 checksum result.
+ *
+ * \return         \c 0 on success.
+ */
+int mbedcrypto_sha512_finish_ret( mbedcrypto_sha512_context *ctx,
+                               unsigned char output[64] );
+
+/**
+ * \brief          This function processes a single data block within
+ *                 the ongoing SHA-512 computation.
+ *
+ * \param ctx      The SHA-512 context.
+ * \param data     The buffer holding one block of data.
+ *
+ * \return         \c 0 on success.
+ */
+int mbedcrypto_internal_sha512_process( mbedcrypto_sha512_context *ctx,
+                                     const unsigned char data[128] );
+#if !defined(MBEDCRYPTO_DEPRECATED_REMOVED)
+#if defined(MBEDCRYPTO_DEPRECATED_WARNING)
+#define MBEDCRYPTO_DEPRECATED      __attribute__((deprecated))
+#else
+#define MBEDCRYPTO_DEPRECATED
+#endif
+/**
+ * \brief          This function starts a SHA-384 or SHA-512 checksum
+ *                 calculation.
+ *
+ * \deprecated     Superseded by mbedcrypto_sha512_starts_ret() in 2.7.0
+ *
+ * \param ctx      The SHA-512 context to initialize.
+ * \param is384    Determines which function to use:
+ *                 0: Use SHA-512, or 1: Use SHA-384.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha512_starts( mbedcrypto_sha512_context *ctx,
+                                               int is384 );
+
+/**
+ * \brief          This function feeds an input buffer into an ongoing
+ *                 SHA-512 checksum calculation.
+ *
+ * \deprecated     Superseded by mbedcrypto_sha512_update_ret() in 2.7.0.
+ *
+ * \param ctx      The SHA-512 context.
+ * \param input    The buffer holding the data.
+ * \param ilen     The length of the input data.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha512_update( mbedcrypto_sha512_context *ctx,
+                                               const unsigned char *input,
+                                               size_t ilen );
+
+/**
+ * \brief          This function finishes the SHA-512 operation, and writes
+ *                 the result to the output buffer.
+ *
+ * \deprecated     Superseded by mbedcrypto_sha512_finish_ret() in 2.7.0.
+ *
+ * \param ctx      The SHA-512 context.
+ * \param output   The SHA-384 or SHA-512 checksum result.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha512_finish( mbedcrypto_sha512_context *ctx,
+                                               unsigned char output[64] );
+
+/**
+ * \brief          This function processes a single data block within
+ *                 the ongoing SHA-512 computation. This function is for
+ *                 internal use only.
+ *
+ * \deprecated     Superseded by mbedcrypto_internal_sha512_process() in 2.7.0.
+ *
+ * \param ctx      The SHA-512 context.
+ * \param data     The buffer holding one block of data.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha512_process(
+                                            mbedcrypto_sha512_context *ctx,
+                                            const unsigned char data[128] );
+
+#undef MBEDCRYPTO_DEPRECATED
+#endif /* !MBEDCRYPTO_DEPRECATED_REMOVED */
+
+/**
+ * \brief          This function calculates the SHA-512 or SHA-384
+ *                 checksum of a buffer.
+ *
+ *                 The function allocates the context, performs the
+ *                 calculation, and frees the context.
+ *
+ *                 The SHA-512 result is calculated as
+ *                 output = SHA-512(input buffer).
+ *
+ * \param input    The buffer holding the input data.
+ * \param ilen     The length of the input data.
+ * \param output   The SHA-384 or SHA-512 checksum result.
+ * \param is384    Determines which function to use:
+ *                 0: Use SHA-512, or 1: Use SHA-384.
+ *
+ * \return         \c 0 on success.
+ */
+int mbedcrypto_sha512_ret( const unsigned char *input,
+                        size_t ilen,
+                        unsigned char output[64],
+                        int is384 );
+
+#if !defined(MBEDCRYPTO_DEPRECATED_REMOVED)
+#if defined(MBEDCRYPTO_DEPRECATED_WARNING)
+#define MBEDCRYPTO_DEPRECATED      __attribute__((deprecated))
+#else
+#define MBEDCRYPTO_DEPRECATED
+#endif
+/**
+ * \brief          This function calculates the SHA-512 or SHA-384
+ *                 checksum of a buffer.
+ *
+ *                 The function allocates the context, performs the
+ *                 calculation, and frees the context.
+ *
+ *                 The SHA-512 result is calculated as
+ *                 output = SHA-512(input buffer).
+ *
+ * \deprecated     Superseded by mbedcrypto_sha512_ret() in 2.7.0
+ *
+ * \param input    The buffer holding the data.
+ * \param ilen     The length of the input data.
+ * \param output   The SHA-384 or SHA-512 checksum result.
+ * \param is384    Determines which function to use:
+ *                 0: Use SHA-512, or 1: Use SHA-384.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha512( const unsigned char *input,
+                                        size_t ilen,
+                                        unsigned char output[64],
+                                        int is384 );
+
+#undef MBEDCRYPTO_DEPRECATED
+#endif /* !MBEDCRYPTO_DEPRECATED_REMOVED */
+ /**
+ * \brief          The SHA-384 or SHA-512 checkup routine.
+ *
+ * \return         \c 0 on success.
+ * \return         \c 1 on failure.
+ */
+int mbedcrypto_sha512_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* mbedcrypto_sha512.h */