187 lines
5.4 KiB
C
187 lines
5.4 KiB
C
/*
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* Copyright (c) 2006-2019, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-04-25 tyx the first version
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*/
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#ifndef __HW_BIGNUM_H__
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#define __HW_BIGNUM_H__
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#include <hwcrypto.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct hwcrypto_bignum;
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/* bignum obj */
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struct hw_bignum_mpi
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{
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int sign; /**< integer sign */
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rt_size_t total; /**< total of limbs */
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rt_uint8_t *p; /**< pointer to limbs */
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};
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struct hwcrypto_bignum_ops
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{
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rt_err_t (*add)(struct hwcrypto_bignum *bignum_ctx,
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struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b); /**< x = a + b */
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rt_err_t (*sub)(struct hwcrypto_bignum *bignum_ctx,
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struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b); /**< x = a - b */
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rt_err_t (*mul)(struct hwcrypto_bignum *bignum_ctx,
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struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b); /**< x = a * b */
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rt_err_t (*mulmod)(struct hwcrypto_bignum *bignum_ctx,
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struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b,
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const struct hw_bignum_mpi *c); /**< x = a * b (mod c) */
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rt_err_t (*exptmod)(struct hwcrypto_bignum *bignum_ctx,
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struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b,
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const struct hw_bignum_mpi *c); /**< x = a ^ b (mod c) */
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};
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/**
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* @brief bignum context. Hardware driver usage
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*/
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struct hwcrypto_bignum
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{
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struct rt_hwcrypto_ctx parent; /**< Inheritance from hardware crypto context */
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const struct hwcrypto_bignum_ops *ops; /**< !! Hardware initializes this value when creating context !! */
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};
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/**
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* @brief Setting bignum default devices
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_bignum_default(struct rt_hwcrypto_device *device);
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/**
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* @brief Init bignum obj
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*/
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void rt_hwcrypto_bignum_init(struct hw_bignum_mpi *n);
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/**
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* @brief free a bignum obj
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*
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* @param Pointer to bignum obj
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*/
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void rt_hwcrypto_bignum_free(struct hw_bignum_mpi *n);
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/**
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* @brief Get length of bignum as an unsigned binary buffer
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*
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* @param n bignum obj
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*
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* @return binary buffer Length
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*/
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int rt_hwcrypto_bignum_get_len(const struct hw_bignum_mpi *n);
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/**
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* @brief Export n into unsigned binary data, big endian
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*
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* @param n bignum obj
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* @param buf Buffer for the binary number
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* @param len Length of the buffer
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*
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* @return export bin length
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*/
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int rt_hwcrypto_bignum_export_bin(struct hw_bignum_mpi *n, rt_uint8_t *buf, int len);
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/**
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* @brief Import n from unsigned binary data, big endian
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*
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* @param n bignum obj
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* @param buf Buffer for the binary number
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* @param len Length of the buffer
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_bignum_import_bin(struct hw_bignum_mpi *n, rt_uint8_t *buf, int len);
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/**
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* @brief x = a + b
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*
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* @param a bignum obj
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* @param b bignum obj
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* @param c bignum obj
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_bignum_add(struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b);
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/**
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* @brief x = a - b
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*
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* @param a bignum obj
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* @param b bignum obj
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* @param c bignum obj
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_bignum_sub(struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b);
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/**
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* @brief x = a * b
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*
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* @param a bignum obj
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* @param b bignum obj
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* @param c bignum obj
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_bignum_mul(struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b);
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/**
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* @brief x = a * b (mod c)
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*
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* @param a bignum obj
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* @param b bignum obj
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* @param c bignum obj
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_bignum_mulmod(struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b,
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const struct hw_bignum_mpi *c);
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/**
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* @brief x = a ^ b (mod c)
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*
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* @param a bignum obj
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* @param b bignum obj
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* @param c bignum obj
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*
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* @return RT_EOK on success.
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*/
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rt_err_t rt_hwcrypto_bignum_exptmod(struct hw_bignum_mpi *x,
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const struct hw_bignum_mpi *a,
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const struct hw_bignum_mpi *b,
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const struct hw_bignum_mpi *c);
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#ifdef __cplusplus
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}
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#endif
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#endif
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