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-rw-r--r--include/mbedtls/sha256.h198
1 files changed, 0 insertions, 198 deletions
diff --git a/include/mbedtls/sha256.h b/include/mbedtls/sha256.h
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--- a/include/mbedtls/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 The Mbed TLS Contributors
- * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
- */
-#ifndef MBEDTLS_SHA256_H
-#define MBEDTLS_SHA256_H
-#include "mbedtls/private_access.h"
-
-#include "mbedtls/build_info.h"
-
-#include <stddef.h>
-#include <stdint.h>
-
-/** SHA-256 input data was malformed. */
-#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA -0x0074
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(MBEDTLS_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 mbedtls_sha256_starts().
- */
-typedef struct mbedtls_sha256_context {
- unsigned char MBEDTLS_PRIVATE(buffer)[64]; /*!< The data block being processed. */
- uint32_t MBEDTLS_PRIVATE(total)[2]; /*!< The number of Bytes processed. */
- uint32_t MBEDTLS_PRIVATE(state)[8]; /*!< The intermediate digest state. */
- int MBEDTLS_PRIVATE(is224); /*!< Determines which function to use:
- 0: Use SHA-256, or 1: Use SHA-224. */
-}
-mbedtls_sha256_context;
-
-#else /* MBEDTLS_SHA256_ALT */
-#include "sha256_alt.h"
-#endif /* MBEDTLS_SHA256_ALT */
-
-/**
- * \brief This function initializes a SHA-256 context.
- *
- * \param ctx The SHA-256 context to initialize. This must not be \c NULL.
- */
-void mbedtls_sha256_init(mbedtls_sha256_context *ctx);
-
-/**
- * \brief This function clears a SHA-256 context.
- *
- * \param ctx The SHA-256 context to clear. This may be \c NULL, in which
- * case this function returns immediately. If it is not \c NULL,
- * it must point to an initialized SHA-256 context.
- */
-void mbedtls_sha256_free(mbedtls_sha256_context *ctx);
-
-/**
- * \brief This function clones the state of a SHA-256 context.
- *
- * \param dst The destination context. This must be initialized.
- * \param src The context to clone. This must be initialized.
- */
-void mbedtls_sha256_clone(mbedtls_sha256_context *dst,
- const mbedtls_sha256_context *src);
-
-/**
- * \brief This function starts a SHA-224 or SHA-256 checksum
- * calculation.
- *
- * \param ctx The context to use. This must be initialized.
- * \param is224 This determines which function to use. This must be
- * either \c 0 for SHA-256, or \c 1 for SHA-224.
- *
- * \note is224 must be defined accordingly to the enabled
- * MBEDTLS_SHA224_C/MBEDTLS_SHA256_C symbols otherwise the
- * function will return #MBEDTLS_ERR_SHA512_BAD_INPUT_DATA.
- *
- * \return \c 0 on success.
- * \return A negative error code on failure.
- */
-int mbedtls_sha256_starts(mbedtls_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. This must be initialized
- * and have a hash operation started.
- * \param input The buffer holding the data. This must be a readable
- * buffer of length \p ilen Bytes.
- * \param ilen The length of the input data in Bytes.
- *
- * \return \c 0 on success.
- * \return A negative error code on failure.
- */
-int mbedtls_sha256_update(mbedtls_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. This must be initialized
- * and have a hash operation started.
- * \param output The SHA-224 or SHA-256 checksum result.
- * This must be a writable buffer of length \c 32 bytes
- * for SHA-256, \c 28 bytes for SHA-224.
- *
- * \return \c 0 on success.
- * \return A negative error code on failure.
- */
-int mbedtls_sha256_finish(mbedtls_sha256_context *ctx,
- unsigned char *output);
-
-/**
- * \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. This must be initialized.
- * \param data The buffer holding one block of data. This must
- * be a readable buffer of length \c 64 Bytes.
- *
- * \return \c 0 on success.
- * \return A negative error code on failure.
- */
-int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx,
- const unsigned char data[64]);
-
-/**
- * \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 data. This must be a readable
- * buffer of length \p ilen Bytes.
- * \param ilen The length of the input data in Bytes.
- * \param output The SHA-224 or SHA-256 checksum result.
- * This must be a writable buffer of length \c 32 bytes
- * for SHA-256, \c 28 bytes for SHA-224.
- * \param is224 Determines which function to use. This must be
- * either \c 0 for SHA-256, or \c 1 for SHA-224.
- *
- * \return \c 0 on success.
- * \return A negative error code on failure.
- */
-int mbedtls_sha256(const unsigned char *input,
- size_t ilen,
- unsigned char *output,
- int is224);
-
-#if defined(MBEDTLS_SELF_TEST)
-
-#if defined(MBEDTLS_SHA224_C)
-/**
- * \brief The SHA-224 checkup routine.
- *
- * \return \c 0 on success.
- * \return \c 1 on failure.
- */
-int mbedtls_sha224_self_test(int verbose);
-#endif /* MBEDTLS_SHA224_C */
-
-#if defined(MBEDTLS_SHA256_C)
-/**
- * \brief The SHA-256 checkup routine.
- *
- * \return \c 0 on success.
- * \return \c 1 on failure.
- */
-int mbedtls_sha256_self_test(int verbose);
-#endif /* MBEDTLS_SHA256_C */
-
-#endif /* MBEDTLS_SELF_TEST */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* mbedtls_sha256.h */