mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
#ifndef _ESP_BIGNUM_H_
|
|
#define _ESP_BIGNUM_H_
|
|
|
|
#include <mbedtls/bignum.h>
|
|
#include <stdbool.h>
|
|
|
|
/* Use montgomery exponentiation (HAC 14.94) for calculating X ^ Y mod M,
|
|
this may be faster for some targets. The hardware acceleration support for modular
|
|
exponentiation on the ESP32 is slow for public key operations, so use montgomery
|
|
exponentiation instead.
|
|
*/
|
|
#if CONFIG_IDF_TARGET_ESP32
|
|
#define ESP_MPI_USE_MONT_EXP
|
|
#endif
|
|
|
|
/**
|
|
* @brief Enable the MPI hardware and acquire the lock
|
|
*
|
|
*/
|
|
void esp_mpi_enable_hardware_hw_op( void );
|
|
|
|
/**
|
|
* @brief Disable the MPI hardware and release the lock
|
|
*
|
|
*/
|
|
void esp_mpi_disable_hardware_hw_op( void );
|
|
|
|
/**
|
|
* @brief Calculate the number of words needed to represent the input word in hardware
|
|
*
|
|
* @param words The number of words to be represented
|
|
*
|
|
* @return size_t Number of words required
|
|
*/
|
|
size_t esp_mpi_hardware_words(size_t words);
|
|
|
|
/**
|
|
* @brief Starts a (X * Y) Mod M calculation in hardware. Rinv and M_prime needs to be precalculated in software.
|
|
*
|
|
*/
|
|
void esp_mpi_mul_mpi_mod_hw_op(const mbedtls_mpi *X, const mbedtls_mpi *Y, const mbedtls_mpi *M, const mbedtls_mpi *Rinv, mbedtls_mpi_uint Mprime, size_t hw_words);
|
|
|
|
/**
|
|
* @brief Starts a (X * Y) calculation in hardware.
|
|
*
|
|
*/
|
|
void esp_mpi_mul_mpi_hw_op(const mbedtls_mpi *X, const mbedtls_mpi *Y, size_t num_words);
|
|
|
|
/**
|
|
* @brief Special-case of (X * Y), where we use hardware montgomery mod
|
|
multiplication to calculate result where either A or B are >2048 bits so
|
|
can't use the standard multiplication method.
|
|
*
|
|
*/
|
|
void esp_mpi_mult_mpi_failover_mod_mult_hw_op(const mbedtls_mpi *X, const mbedtls_mpi *Y, size_t num_words);
|
|
|
|
/**
|
|
* @brief Read out the result from the previous calculation.
|
|
*
|
|
*/
|
|
void esp_mpi_read_result_hw_op(mbedtls_mpi *Z, size_t z_words);
|
|
|
|
#ifdef ESP_MPI_USE_MONT_EXP
|
|
/**
|
|
* @brief Starts a montgomery multiplication calculation in hardware
|
|
*
|
|
*/
|
|
int esp_mont_hw_op(mbedtls_mpi* Z, const mbedtls_mpi* X, const mbedtls_mpi* Y, const mbedtls_mpi* M,
|
|
mbedtls_mpi_uint Mprime,
|
|
size_t hw_words,
|
|
bool again);
|
|
|
|
#else
|
|
|
|
/**
|
|
* @brief Starts a (X ^ Y) Mod M calculation in hardware. Rinv and M_prime needs to be precalculated in software.
|
|
*
|
|
*/
|
|
void esp_mpi_exp_mpi_mod_hw_op(const mbedtls_mpi *X, const mbedtls_mpi *Y, const mbedtls_mpi *M, const mbedtls_mpi *Rinv, mbedtls_mpi_uint Mprime, size_t hw_words);
|
|
|
|
#endif //ESP_MPI_USE_MONT_EXP
|
|
|
|
/**
|
|
* @brief Enable/disables MPI operation complete interrupt
|
|
*
|
|
* @param enable true: enable, false: disable
|
|
*/
|
|
void esp_mpi_interrupt_enable( bool enable );
|
|
|
|
/**
|
|
* @brief Clears the MPI operation complete interrupt status
|
|
*
|
|
*/
|
|
void esp_mpi_interrupt_clear( void );
|
|
|
|
#endif
|