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/**
* \file sha3.h
*
* \brief This file contains SHA-3 definitions and functions.
*
* The Secure Hash Algorithms cryptographic
* hash functions are defined in <em>FIPS 202: SHA-3 Standard:
* Permutation-Based Hash and Extendable-Output Functions </em>.
*/
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#ifndef MBEDTLS_SHA3_H
#define MBEDTLS_SHA3_H
#include "mbedtls/private_access.h"
#include "mbedtls/build_info.h"
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/** SHA-3 input data was malformed. */
#define MBEDTLS_ERR_SHA3_BAD_INPUT_DATA -0x0076
/**
* SHA-3 family id.
*
* It identifies the family (SHA3-256, SHA3-512, etc.)
*/
typedef enum {
MBEDTLS_SHA3_NONE = 0, /*!< Operation not defined. */
MBEDTLS_SHA3_224, /*!< SHA3-224 */
MBEDTLS_SHA3_256, /*!< SHA3-256 */
MBEDTLS_SHA3_384, /*!< SHA3-384 */
MBEDTLS_SHA3_512, /*!< SHA3-512 */
} mbedtls_sha3_id;
/**
* \brief The SHA-3 context structure.
*
* The structure is used SHA-3 checksum calculations.
*/
typedef struct {
uint64_t MBEDTLS_PRIVATE(state[25]);
uint32_t MBEDTLS_PRIVATE(index);
uint16_t MBEDTLS_PRIVATE(olen);
uint16_t MBEDTLS_PRIVATE(max_block_size);
}
mbedtls_sha3_context;
/**
* \brief This function initializes a SHA-3 context.
*
* \param ctx The SHA-3 context to initialize. This must not be \c NULL.
*/
void mbedtls_sha3_init(mbedtls_sha3_context *ctx);
/**
* \brief This function clears a SHA-3 context.
*
* \param ctx The SHA-3 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-3 context.
*/
void mbedtls_sha3_free(mbedtls_sha3_context *ctx);
/**
* \brief This function clones the state of a SHA-3 context.
*
* \param dst The destination context. This must be initialized.
* \param src The context to clone. This must be initialized.
*/
void mbedtls_sha3_clone(mbedtls_sha3_context *dst,
const mbedtls_sha3_context *src);
/**
* \brief This function starts a SHA-3 checksum
* calculation.
*
* \param ctx The context to use. This must be initialized.
* \param id The id of the SHA-3 family.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_sha3_starts(mbedtls_sha3_context *ctx, mbedtls_sha3_id id);
/**
* \brief This function feeds an input buffer into an ongoing
* SHA-3 checksum calculation.
*
* \param ctx The SHA-3 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_sha3_update(mbedtls_sha3_context *ctx,
const uint8_t *input,
size_t ilen);
/**
* \brief This function finishes the SHA-3 operation, and writes
* the result to the output buffer.
*
* \param ctx The SHA-3 context. This must be initialized
* and have a hash operation started.
* \param output The SHA-3 checksum result.
* This must be a writable buffer of length \c olen bytes.
* \param olen Defines the length of output buffer (in bytes). For SHA-3 224, SHA-3 256,
* SHA-3 384 and SHA-3 512 \c olen must equal to 28, 32, 48 and 64,
* respectively.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_sha3_finish(mbedtls_sha3_context *ctx,
uint8_t *output, size_t olen);
/**
* \brief This function calculates the SHA-3
* checksum of a buffer.
*
* The function allocates the context, performs the
* calculation, and frees the context.
*
* The SHA-3 result is calculated as
* output = SHA-3(id, input buffer, d).
*
* \param id The id of the SHA-3 family.
* \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-3 checksum result.
* This must be a writable buffer of length \c olen bytes.
* \param olen Defines the length of output buffer (in bytes). For SHA-3 224, SHA-3 256,
* SHA-3 384 and SHA-3 512 \c olen must equal to 28, 32, 48 and 64,
* respectively.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_sha3(mbedtls_sha3_id id, const uint8_t *input,
size_t ilen,
uint8_t *output,
size_t olen);
#if defined(MBEDTLS_SELF_TEST)
/**
* \brief Checkup routine for the algorithms implemented
* by this module: SHA3-224, SHA3-256, SHA3-384, SHA3-512.
*
* \return 0 if successful, or 1 if the test failed.
*/
int mbedtls_sha3_self_test(int verbose);
#endif /* MBEDTLS_SELF_TEST */
#ifdef __cplusplus
}
#endif
#endif /* mbedtls_sha3.h */
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