Release Mbed Crypto 0.1.0a
diff --git a/include/mbedcrypto/sha256.h b/include/mbedcrypto/sha256.h
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+++ b/include/mbedcrypto/sha256.h
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+/**
+ * \file sha256.h
+ *
+ * \brief This file contains SHA-224 and SHA-256 definitions and functions.
+ *
+ * The Secure Hash Algorithms 224 and 256 (SHA-224 and SHA-256) 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_SHA256_H
+#define MBEDCRYPTO_SHA256_H
+
+#if !defined(MBEDCRYPTO_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDCRYPTO_CONFIG_FILE
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define MBEDCRYPTO_ERR_SHA256_HW_ACCEL_FAILED -0x0037 /**< SHA-256 hardware accelerator failed */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(MBEDCRYPTO_SHA256_ALT)
+// Regular implementation
+//
+
+/**
+ * \brief The SHA-256 context structure.
+ *
+ * The structure is used both for SHA-256 and for SHA-224
+ * checksum calculations. The choice between these two is
+ * made in the call to mbedcrypto_sha256_starts_ret().
+ */
+typedef struct
+{
+ uint32_t total[2]; /*!< The number of Bytes processed. */
+ uint32_t state[8]; /*!< The intermediate digest state. */
+ unsigned char buffer[64]; /*!< The data block being processed. */
+ int is224; /*!< Determines which function to use:
+ 0: Use SHA-256, or 1: Use SHA-224. */
+}
+mbedcrypto_sha256_context;
+
+#else /* MBEDCRYPTO_SHA256_ALT */
+#include "sha256_alt.h"
+#endif /* MBEDCRYPTO_SHA256_ALT */
+
+/**
+ * \brief This function initializes a SHA-256 context.
+ *
+ * \param ctx The SHA-256 context to initialize.
+ */
+void mbedcrypto_sha256_init( mbedcrypto_sha256_context *ctx );
+
+/**
+ * \brief This function clears a SHA-256 context.
+ *
+ * \param ctx The SHA-256 context to clear.
+ */
+void mbedcrypto_sha256_free( mbedcrypto_sha256_context *ctx );
+
+/**
+ * \brief This function clones the state of a SHA-256 context.
+ *
+ * \param dst The destination context.
+ * \param src The context to clone.
+ */
+void mbedcrypto_sha256_clone( mbedcrypto_sha256_context *dst,
+ const mbedcrypto_sha256_context *src );
+
+/**
+ * \brief This function starts a SHA-224 or SHA-256 checksum
+ * calculation.
+ *
+ * \param ctx The context to initialize.
+ * \param is224 Determines which function to use:
+ * 0: Use SHA-256, or 1: Use SHA-224.
+ *
+ * \return \c 0 on success.
+ */
+int mbedcrypto_sha256_starts_ret( mbedcrypto_sha256_context *ctx, int is224 );
+
+/**
+ * \brief This function feeds an input buffer into an ongoing
+ * SHA-256 checksum calculation.
+ *
+ * \param ctx The SHA-256 context.
+ * \param input The buffer holding the data.
+ * \param ilen The length of the input data.
+ *
+ * \return \c 0 on success.
+ */
+int mbedcrypto_sha256_update_ret( mbedcrypto_sha256_context *ctx,
+ const unsigned char *input,
+ size_t ilen );
+
+/**
+ * \brief This function finishes the SHA-256 operation, and writes
+ * the result to the output buffer.
+ *
+ * \param ctx The SHA-256 context.
+ * \param output The SHA-224 or SHA-256 checksum result.
+ *
+ * \return \c 0 on success.
+ */
+int mbedcrypto_sha256_finish_ret( mbedcrypto_sha256_context *ctx,
+ unsigned char output[32] );
+
+/**
+ * \brief This function processes a single data block within
+ * the ongoing SHA-256 computation. This function is for
+ * internal use only.
+ *
+ * \param ctx The SHA-256 context.
+ * \param data The buffer holding one block of data.
+ *
+ * \return \c 0 on success.
+ */
+int mbedcrypto_internal_sha256_process( mbedcrypto_sha256_context *ctx,
+ const unsigned char data[64] );
+
+#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-224 or SHA-256 checksum
+ * calculation.
+ *
+ *
+ * \deprecated Superseded by mbedcrypto_sha256_starts_ret() in 2.7.0.
+ *
+ * \param ctx The context to initialize.
+ * \param is224 Determines which function to use:
+ * 0: Use SHA-256, or 1: Use SHA-224.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha256_starts( mbedcrypto_sha256_context *ctx,
+ int is224 );
+
+/**
+ * \brief This function feeds an input buffer into an ongoing
+ * SHA-256 checksum calculation.
+ *
+ * \deprecated Superseded by mbedcrypto_sha256_update_ret() in 2.7.0.
+ *
+ * \param ctx The SHA-256 context to initialize.
+ * \param input The buffer holding the data.
+ * \param ilen The length of the input data.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha256_update( mbedcrypto_sha256_context *ctx,
+ const unsigned char *input,
+ size_t ilen );
+
+/**
+ * \brief This function finishes the SHA-256 operation, and writes
+ * the result to the output buffer.
+ *
+ * \deprecated Superseded by mbedcrypto_sha256_finish_ret() in 2.7.0.
+ *
+ * \param ctx The SHA-256 context.
+ * \param output The SHA-224 or SHA-256 checksum result.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha256_finish( mbedcrypto_sha256_context *ctx,
+ unsigned char output[32] );
+
+/**
+ * \brief This function processes a single data block within
+ * the ongoing SHA-256 computation. This function is for
+ * internal use only.
+ *
+ * \deprecated Superseded by mbedcrypto_internal_sha256_process() in 2.7.0.
+ *
+ * \param ctx The SHA-256 context.
+ * \param data The buffer holding one block of data.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha256_process( mbedcrypto_sha256_context *ctx,
+ const unsigned char data[64] );
+
+#undef MBEDCRYPTO_DEPRECATED
+#endif /* !MBEDCRYPTO_DEPRECATED_REMOVED */
+
+/**
+ * \brief This function calculates the SHA-224 or SHA-256
+ * checksum of a buffer.
+ *
+ * The function allocates the context, performs the
+ * calculation, and frees the context.
+ *
+ * The SHA-256 result is calculated as
+ * output = SHA-256(input buffer).
+ *
+ * \param input The buffer holding the input data.
+ * \param ilen The length of the input data.
+ * \param output The SHA-224 or SHA-256 checksum result.
+ * \param is224 Determines which function to use:
+ * 0: Use SHA-256, or 1: Use SHA-224.
+ */
+int mbedcrypto_sha256_ret( const unsigned char *input,
+ size_t ilen,
+ unsigned char output[32],
+ int is224 );
+
+#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-224 or SHA-256 checksum
+ * of a buffer.
+ *
+ * The function allocates the context, performs the
+ * calculation, and frees the context.
+ *
+ * The SHA-256 result is calculated as
+ * output = SHA-256(input buffer).
+ *
+ * \deprecated Superseded by mbedcrypto_sha256_ret() in 2.7.0.
+ *
+ * \param input The buffer holding the data.
+ * \param ilen The length of the input data.
+ * \param output The SHA-224 or SHA-256 checksum result.
+ * \param is224 Determines which function to use:
+ * 0: Use SHA-256, or 1: Use SHA-224.
+ */
+MBEDCRYPTO_DEPRECATED void mbedcrypto_sha256( const unsigned char *input,
+ size_t ilen,
+ unsigned char output[32],
+ int is224 );
+
+#undef MBEDCRYPTO_DEPRECATED
+#endif /* !MBEDCRYPTO_DEPRECATED_REMOVED */
+
+/**
+ * \brief The SHA-224 and SHA-256 checkup routine.
+ *
+ * \return \c 0 on success.
+ * \return \c 1 on failure.
+ */
+int mbedcrypto_sha256_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* mbedcrypto_sha256.h */