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/**
* \file sha3x4_ops.h
* \brief Header defining the callback API for OQS SHA3 and SHAKE
*
* \author John Underhill, Douglas Stebila
*
* SPDX-License-Identifier: MIT
*/
#ifndef OQS_SHA3X4_OPS_H
#define OQS_SHA3X4_OPS_H
#include <stddef.h>
#include <stdint.h>
#include <oqs/common.h>
#if defined(__cplusplus)
extern "C" {
#endif
/** Data structure for the state of the four-way parallel incremental SHAKE-128 API. */
typedef struct {
/** Internal state. */
void *ctx;
} OQS_SHA3_shake128_x4_inc_ctx;
/** Data structure for the state of the four-way parallel incremental SHAKE-256 API. */
typedef struct {
/** Internal state. */
void *ctx;
} OQS_SHA3_shake256_x4_inc_ctx;
/** Data structure implemented by cryptographic provider for the
* four-way parallel incremental SHAKE-256 operations.
*/
struct OQS_SHA3_x4_callbacks {
/**
* Implementation of function OQS_SHA3_shake128_x4.
*/
void (*SHA3_shake128_x4)(
uint8_t *out0,
uint8_t *out1,
uint8_t *out2,
uint8_t *out3,
size_t outlen,
const uint8_t *in0,
const uint8_t *in1,
const uint8_t *in2,
const uint8_t *in3,
size_t inlen);
/**
* Implementation of function OQS_SHA3_shake128_x4_inc_init.
*/
void (*SHA3_shake128_x4_inc_init)(OQS_SHA3_shake128_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake128_x4_inc_absorb.
*/
void (*SHA3_shake128_x4_inc_absorb)(
OQS_SHA3_shake128_x4_inc_ctx *state,
const uint8_t *in0,
const uint8_t *in1,
const uint8_t *in2,
const uint8_t *in3,
size_t inlen);
/**
* Implementation of function OQS_SHA3_shake128_x4_inc_finalize.
*/
void (*SHA3_shake128_x4_inc_finalize)(OQS_SHA3_shake128_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake128_x4_inc_squeeze.
*/
void (*SHA3_shake128_x4_inc_squeeze)(
uint8_t *out0,
uint8_t *out1,
uint8_t *out2,
uint8_t *out3,
size_t outlen,
OQS_SHA3_shake128_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake128_x4_inc_ctx_release.
*/
void (*SHA3_shake128_x4_inc_ctx_release)(OQS_SHA3_shake128_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake128_x4_inc_ctx_clone.
*/
void (*SHA3_shake128_x4_inc_ctx_clone)(
OQS_SHA3_shake128_x4_inc_ctx *dest,
const OQS_SHA3_shake128_x4_inc_ctx *src);
/**
* Implementation of function OQS_SHA3_shake128_x4_inc_ctx_reset.
*/
void (*SHA3_shake128_x4_inc_ctx_reset)(OQS_SHA3_shake128_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake256_x4.
*/
void (*SHA3_shake256_x4)(
uint8_t *out0,
uint8_t *out1,
uint8_t *out2,
uint8_t *out3,
size_t outlen,
const uint8_t *in0,
const uint8_t *in1,
const uint8_t *in2,
const uint8_t *in3,
size_t inlen);
/**
* Implementation of function OQS_SHA3_shake256_x4_inc_init.
*/
void (*SHA3_shake256_x4_inc_init)(OQS_SHA3_shake256_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake256_x4_inc_absorb.
*/
void (*SHA3_shake256_x4_inc_absorb)(
OQS_SHA3_shake256_x4_inc_ctx *state,
const uint8_t *in0,
const uint8_t *in1,
const uint8_t *in2,
const uint8_t *in3,
size_t inlen);
/**
* Implementation of function OQS_SHA3_shake256_x4_inc_finalize.
*/
void (*SHA3_shake256_x4_inc_finalize)(OQS_SHA3_shake256_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake256_x4_inc_squeeze.
*/
void (*SHA3_shake256_x4_inc_squeeze)(
uint8_t *out0,
uint8_t *out1,
uint8_t *out2,
uint8_t *out3,
size_t outlen,
OQS_SHA3_shake256_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake256_x4_inc_ctx_release.
*/
void (*SHA3_shake256_x4_inc_ctx_release)(OQS_SHA3_shake256_x4_inc_ctx *state);
/**
* Implementation of function OQS_SHA3_shake256_x4_inc_ctx_clone.
*/
void (*SHA3_shake256_x4_inc_ctx_clone)(
OQS_SHA3_shake256_x4_inc_ctx *dest,
const OQS_SHA3_shake256_x4_inc_ctx *src);
/**
* Implementation of function OQS_SHA3_shake256_x4_inc_ctx_reset.
*/
void (*SHA3_shake256_x4_inc_ctx_reset)(OQS_SHA3_shake256_x4_inc_ctx *state);
};
/**
* Set callback functions for 4-parallel SHA3 operations.
*
* This function may be called before OQS_init to switch the
* cryptographic provider for 4-parallel SHA3 operations. If it is not
* called, the default provider determined at build time will be used.
*
* @param new_callbacks Callback functions defined in OQS_SHA3_x4_callbacks struct
*/
OQS_API void OQS_SHA3_x4_set_callbacks(struct OQS_SHA3_x4_callbacks *new_callbacks);
#if defined(__cplusplus)
} // extern "C"
#endif
#endif // OQS_SHA3X4_OPS_H