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Port to ESP32-C3

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Christian Baars 2021-11-08 17:33:51 +01:00 committed by GitHub
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70
lib/libesp32_div/ESP32-HomeKit/src/port/bignum.h
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@ -13,68 +13,8 @@
// limitations under the License.
#pragma once
#include_next "mbedtls/bignum.h"
#include "sdkconfig.h"
/**
* This is a wrapper for the main mbedtls/bignum.h. This wrapper
* provides a few additional ESP32-only functions.
*
* This is because we don't set MBEDTLS_BIGNUM_ALT in the same way we
* do for AES, SHA, etc. Because we still use most of the bignum.h
* implementation and just replace a few hardware accelerated
* functions (see MBEDTLS_MPI_EXP_MOD_ALT & MBEDTLS_MPI_MUL_MPI_ALT in
* esp_config.h).
*
* @note Unlike the other hardware accelerator support functions in esp32/hwcrypto, there is no
* generic "hwcrypto/bignum.h" header for using these functions without mbedTLS. The reason for this
* is that all of the function implementations depend strongly upon the mbedTLS MPI implementation.
*/
/**
* @brief Lock access to RSA Accelerator (MPI/bignum operations)
*
* RSA Accelerator hardware unit can only be used by one
* consumer at a time.
*
* @note This function is non-recursive (do not call it twice from the
* same task.)
*
* @note You do not need to call this if you are using the mbedTLS bignum.h
* API or esp_mpi_xxx functions. This function is only needed if you
* want to call ROM RSA functions or access the registers directly.
*
*/
void esp_mpi_acquire_hardware(void);
/**
* @brief Unlock access to RSA Accelerator (MPI/bignum operations)
*
* Has to be called once for each call to esp_mpi_acquire_hardware().
*
* @note You do not need to call this if you are using the mbedTLS bignum.h
* API or esp_mpi_xxx functions. This function is only needed if you
* want to call ROM RSA functions or access the registers directly.
*/
void esp_mpi_release_hardware(void);
//#if CONFIG_MBEDTLS_HARDWARE_MPI
/* @brief MPI modular mupltiplication function
*
* Calculates Z = (X * Y) mod M using MPI hardware acceleration.
*
* This is not part of the standard mbedTLS bignum API.
*
* @note All of X, Y & Z should be less than 4096 bit long or an error is returned.
*
* @param Z Result bignum, should be pre-initialised with mbedtls_mpi_init().
* @param X First multiplication argument.
* @param Y Second multiplication argument.
* @param M Modulus value for result.
*
* @return 0 on success, mbedTLS MPI error codes on failure.
*/
int esp_mpi_mul_mpi_mod(mbedtls_mpi *Z, const mbedtls_mpi *X, const mbedtls_mpi *Y, const mbedtls_mpi *M);
//#endif // CONFIG_MBEDTLS_HARDWARE_MPI
#if CONFIG_IDF_TARGET_ESP32
#include "bignum_ESP32.h"
#elif CONFIG_IDF_TARGET_ESP32C3
#include "bignum_ESP32_C3.h"
#endif

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lib/libesp32_div/ESP32-HomeKit/src/port/bignum_ESP32.c Normal file
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/**
* \brief Multi-precision integer library, ESP-IDF hardware accelerated parts
*
* based on mbedTLS implementation
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* Additions Copyright (C) 2016-2020, Espressif Systems (Shanghai) PTE Ltd
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#if CONFIG_IDF_TARGET_ESP32
#if __has_include("esp_idf_version.h")
#include "esp_idf_version.h"
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0)
#warning("IDF is 4 or later")
#include "soc/hwcrypto_periph.h"
#endif
#endif
#include "soc/hwcrypto_reg.h"
#include "driver/periph_ctrl.h"
#include <mbedtls/bignum.h>
#include "bignum_impl.h"
#include <sys/param.h>
#include <sys/lock.h>
#if CONFIG_IDF_TARGET_ESP32C3
#include "esp32c3/dport_access.h"
#endif
static _lock_t mpi_lock;
/* Round up number of words to nearest
512 bit (16 word) block count.
*/
size_t esp_mpi_hardware_words(size_t words)
{
return (words + 0xF) & ~0xF;
}
void esp_mpi_enable_hardware_hw_op( void )
{
/* newlib locks lazy initialize on ESP-IDF */
_lock_acquire(&mpi_lock);
/* Enable RSA hardware */
periph_module_enable(PERIPH_RSA_MODULE);
DPORT_REG_CLR_BIT(DPORT_RSA_PD_CTRL_REG, DPORT_RSA_PD);
while (DPORT_REG_READ(RSA_CLEAN_REG) != 1)
{ }
// Note: from enabling RSA clock to here takes about 1.3us
}
void esp_mpi_disable_hardware_hw_op( void )
{
DPORT_REG_SET_BIT(DPORT_RSA_PD_CTRL_REG, DPORT_RSA_PD);
/* Disable RSA hardware */
periph_module_disable(PERIPH_RSA_MODULE);
_lock_release(&mpi_lock);
}
/* Copy mbedTLS MPI bignum 'mpi' to hardware memory block at 'mem_base'.
If hw_words is higher than the number of words in the bignum then
these additional words will be zeroed in the memory buffer.
*/
static inline void mpi_to_mem_block(uint32_t mem_base, const mbedtls_mpi *mpi, size_t hw_words)
{
uint32_t *pbase = (uint32_t *)mem_base;
uint32_t copy_words = MIN(hw_words, mpi->n);
/* Copy MPI data to memory block registers */
for (int i = 0; i < copy_words; i++) {
pbase[i] = mpi->p[i];
}
/* Zero any remaining memory block data */
for (int i = copy_words; i < hw_words; i++) {
pbase[i] = 0;
}
}
/* Read mbedTLS MPI bignum back from hardware memory block.
Reads num_words words from block.
Bignum 'x' should already be grown to at least num_words by caller (can be done while
calculation is in progress, to save some cycles)
*/
static inline void mem_block_to_mpi(mbedtls_mpi *x, uint32_t mem_base, int num_words)
{
assert(x->n >= num_words);
/* Copy data from memory block registers */
esp_dport_access_read_buffer(x->p, mem_base, num_words);
/* Zero any remaining limbs in the bignum, if the buffer is bigger
than num_words */
for (size_t i = num_words; i < x->n; i++) {
x->p[i] = 0;
}
}
/* Begin an RSA operation. op_reg specifies which 'START' register
to write to.
*/
static inline void start_op(uint32_t op_reg)
{
/* Clear interrupt status */
DPORT_REG_WRITE(RSA_INTERRUPT_REG, 1);
/* Note: above REG_WRITE includes a memw, so we know any writes
to the memory blocks are also complete. */
DPORT_REG_WRITE(op_reg, 1);
}
/* Wait for an RSA operation to complete.
*/
static inline void wait_op_complete(void)
{
while (DPORT_REG_READ(RSA_INTERRUPT_REG) != 1)
{ }
/* clear the interrupt */
DPORT_REG_WRITE(RSA_INTERRUPT_REG, 1);
}
/* Read result from last MPI operation */
void esp_mpi_read_result_hw_op(mbedtls_mpi *Z, size_t z_words)
{
wait_op_complete();
mem_block_to_mpi(Z, RSA_MEM_Z_BLOCK_BASE, z_words);
}
/* Z = (X * Y) mod M */
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)
{
/* Load M, X, Rinv, Mprime (Mprime is mod 2^32) */
mpi_to_mem_block(RSA_MEM_M_BLOCK_BASE, M, hw_words);
mpi_to_mem_block(RSA_MEM_X_BLOCK_BASE, X, hw_words);
mpi_to_mem_block(RSA_MEM_RB_BLOCK_BASE, Rinv, hw_words);
DPORT_REG_WRITE(RSA_M_DASH_REG, (uint32_t)Mprime);
/* "mode" register loaded with number of 512-bit blocks, minus 1 */
DPORT_REG_WRITE(RSA_MULT_MODE_REG, (hw_words / 16) - 1);
/* Execute first stage montgomery multiplication */
start_op(RSA_MULT_START_REG);
wait_op_complete();
/* execute second stage */
/* Load Y to X input memory block, rerun */
mpi_to_mem_block(RSA_MEM_X_BLOCK_BASE, Y, hw_words);
start_op(RSA_MULT_START_REG);
}
/* Z = X * Y */
void esp_mpi_mul_mpi_hw_op(const mbedtls_mpi *X, const mbedtls_mpi *Y, size_t hw_words)
{
/* Copy X (right-extended) & Y (left-extended) to memory block */
mpi_to_mem_block(RSA_MEM_X_BLOCK_BASE, X, hw_words);
mpi_to_mem_block(RSA_MEM_Z_BLOCK_BASE + hw_words * 4, Y, hw_words);
/* NB: as Y is left-extended, we don't zero the bottom words_mult words of Y block.
This is OK for now because zeroing is done by hardware when we do esp_mpi_acquire_hardware().
*/
DPORT_REG_WRITE(RSA_M_DASH_REG, 0);
/* "mode" register loaded with number of 512-bit blocks in result,
plus 7 (for range 9-12). (this is ((N~ / 32) - 1) + 8))
*/
DPORT_REG_WRITE(RSA_MULT_MODE_REG, ((hw_words * 2) / 16) + 7);
start_op(RSA_MULT_START_REG);
}
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)
{
// Note Z may be the same pointer as X or Y
int ret = 0;
// montgomery mult prepare
if (again == false) {
mpi_to_mem_block(RSA_MEM_M_BLOCK_BASE, M, hw_words);
DPORT_REG_WRITE(RSA_M_DASH_REG, Mprime);
DPORT_REG_WRITE(RSA_MULT_MODE_REG, hw_words / 16 - 1);
}
mpi_to_mem_block(RSA_MEM_X_BLOCK_BASE, X, hw_words);
mpi_to_mem_block(RSA_MEM_RB_BLOCK_BASE, Y, hw_words);
start_op(RSA_MULT_START_REG);
Z->s = 1; // The sign of Z will be = M->s (but M->s is always 1)
MBEDTLS_MPI_CHK( mbedtls_mpi_grow(Z, hw_words) );
wait_op_complete();
/* Read back the result */
mem_block_to_mpi(Z, RSA_MEM_Z_BLOCK_BASE, hw_words);
/* from HAC 14.36 - 3. If Z >= M then Z = Z - M */
if (mbedtls_mpi_cmp_mpi(Z, M) >= 0) {
MBEDTLS_MPI_CHK(mbedtls_mpi_sub_mpi(Z, Z, M));
}
cleanup:
return ret;
}
/* Special-case of mbedtls_mpi_mult_mpi(), where we use hardware montgomery mod
multiplication to calculate an mbedtls_mpi_mult_mpi result where either
A or B are >2048 bits so can't use the standard multiplication method.
Result (z_words, based on A bits + B bits) must still be less than 4096 bits.
This case is simpler than the general case modulo multiply of
esp_mpi_mul_mpi_mod() because we can control the other arguments:
* Modulus is chosen with M=(2^num_bits - 1) (ie M=R-1), so output
isn't actually modulo anything.
* Mprime and Rinv are therefore predictable as follows:
Mprime = 1
Rinv = 1
(See RSA Accelerator section in Technical Reference for more about Mprime, Rinv)
*/
void esp_mpi_mult_mpi_failover_mod_mult_hw_op(const mbedtls_mpi *X, const mbedtls_mpi *Y, size_t num_words)
{
size_t hw_words = num_words;
/* M = 2^num_words - 1, so block is entirely FF */
for (int i = 0; i < hw_words; i++) {
DPORT_REG_WRITE(RSA_MEM_M_BLOCK_BASE + i * 4, UINT32_MAX);
}
/* Mprime = 1 */
DPORT_REG_WRITE(RSA_M_DASH_REG, 1);
/* "mode" register loaded with number of 512-bit blocks, minus 1 */
DPORT_REG_WRITE(RSA_MULT_MODE_REG, (hw_words / 16) - 1);
/* Load X */
mpi_to_mem_block(RSA_MEM_X_BLOCK_BASE, X, hw_words);
/* Rinv = 1, write first word */
DPORT_REG_WRITE(RSA_MEM_RB_BLOCK_BASE, 1);
/* Zero out rest of the Rinv words */
for (int i = 1; i < hw_words; i++) {
DPORT_REG_WRITE(RSA_MEM_RB_BLOCK_BASE + i * 4, 0);
}
start_op(RSA_MULT_START_REG);
wait_op_complete();
/* finish the modular multiplication */
/* Load Y to X input memory block, rerun */
mpi_to_mem_block(RSA_MEM_X_BLOCK_BASE, Y, hw_words);
start_op(RSA_MULT_START_REG);
}
#endif //CONFIG_IDF_TARGET_ESP32

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lib/libesp32_div/ESP32-HomeKit/src/port/bignum_ESP32.h Normal file
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@ -0,0 +1,82 @@
// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#if CONFIG_IDF_TARGET_ESP32
#pragma once
#include_next "mbedtls/bignum.h"
#include "sdkconfig.h"
/**
* This is a wrapper for the main mbedtls/bignum.h. This wrapper
* provides a few additional ESP32-only functions.
*
* This is because we don't set MBEDTLS_BIGNUM_ALT in the same way we
* do for AES, SHA, etc. Because we still use most of the bignum.h
* implementation and just replace a few hardware accelerated
* functions (see MBEDTLS_MPI_EXP_MOD_ALT & MBEDTLS_MPI_MUL_MPI_ALT in
* esp_config.h).
*
* @note Unlike the other hardware accelerator support functions in esp32/hwcrypto, there is no
* generic "hwcrypto/bignum.h" header for using these functions without mbedTLS. The reason for this
* is that all of the function implementations depend strongly upon the mbedTLS MPI implementation.
*/
/**
* @brief Lock access to RSA Accelerator (MPI/bignum operations)
*
* RSA Accelerator hardware unit can only be used by one
* consumer at a time.
*
* @note This function is non-recursive (do not call it twice from the
* same task.)
*
* @note You do not need to call this if you are using the mbedTLS bignum.h
* API or esp_mpi_xxx functions. This function is only needed if you
* want to call ROM RSA functions or access the registers directly.
*
*/
void esp_mpi_acquire_hardware(void);
/**
* @brief Unlock access to RSA Accelerator (MPI/bignum operations)
*
* Has to be called once for each call to esp_mpi_acquire_hardware().
*
* @note You do not need to call this if you are using the mbedTLS bignum.h
* API or esp_mpi_xxx functions. This function is only needed if you
* want to call ROM RSA functions or access the registers directly.
*/
void esp_mpi_release_hardware(void);
//#if CONFIG_MBEDTLS_HARDWARE_MPI
/* @brief MPI modular mupltiplication function
*
* Calculates Z = (X * Y) mod M using MPI hardware acceleration.
*
* This is not part of the standard mbedTLS bignum API.
*
* @note All of X, Y & Z should be less than 4096 bit long or an error is returned.
*
* @param Z Result bignum, should be pre-initialised with mbedtls_mpi_init().
* @param X First multiplication argument.
* @param Y Second multiplication argument.
* @param M Modulus value for result.
*
* @return 0 on success, mbedTLS MPI error codes on failure.
*/
int esp_mpi_mul_mpi_mod(mbedtls_mpi *Z, const mbedtls_mpi *X, const mbedtls_mpi *Y, const mbedtls_mpi *M);
//#endif // CONFIG_MBEDTLS_HARDWARE_MPI
#endif CONFIG_IDF_TARGET_ESP32

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lib/libesp32_div/ESP32-HomeKit/src/port/bignum_ESP32_C3.c Normal file
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/**
* \brief Multi-precision integer library, ESP-IDF hardware accelerated parts
*
* based on mbedTLS implementation
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* Additions Copyright (C) 2016-2020, Espressif Systems (Shanghai) PTE Ltd
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#if CONFIG_IDF_TARGET_ESP32C3
#if __has_include("esp_idf_version.h")
#include "esp_idf_version.h"
#endif
#include <sys/param.h>
#include "soc/hwcrypto_periph.h"
#include "driver/periph_ctrl.h"
#include "mbedtls/bignum.h"
#include "bignum_impl.h"
#include "soc/system_reg.h"
#include "soc/periph_defs.h"
#include "esp_crypto_lock.h"
/* Copy mbedTLS MPI bignum 'mpi' to hardware memory block at 'mem_base'.
If hw_words is higher than the number of words in the bignum then
these additional words will be zeroed in the memory buffer.
*/
static inline void mpi_to_mem_block(uint32_t mem_base, const mbedtls_mpi *mpi, size_t num_words)
{
uint32_t *pbase = (uint32_t *)mem_base;
uint32_t copy_words = MIN(num_words, mpi->n);
/* Copy MPI data to memory block registers */
for (int i = 0; i < copy_words; i++) {
pbase[i] = mpi->p[i];
}
/* Zero any remaining memory block data */
for (int i = copy_words; i < num_words; i++) {
pbase[i] = 0;
}
}
/* Read mbedTLS MPI bignum back from hardware memory block.
Reads num_words words from block.
Bignum 'x' should already be grown to at least num_words by caller (can be done while
calculation is in progress, to save some cycles)
*/
static inline void mem_block_to_mpi(mbedtls_mpi *x, uint32_t mem_base, int num_words)
{
/* Copy data from memory block registers */
const size_t REG_WIDTH = sizeof(uint32_t);
for (size_t i = 0; i < num_words; i++) {
x->p[i] = REG_READ(mem_base + (i * REG_WIDTH));
}
/* Zero any remaining limbs in the bignum, if the buffer is bigger
than num_words */
for (size_t i = num_words; i < x->n; i++) {
x->p[i] = 0;
}
}
/* Begin an RSA operation. op_reg specifies which 'START' register
to write to.
*/
static inline void start_op(uint32_t op_reg)
{
/* Clear interrupt status */
REG_WRITE(RSA_CLEAR_INTERRUPT_REG, 1);
/* Note: above REG_WRITE includes a memw, so we know any writes
to the memory blocks are also complete. */
REG_WRITE(op_reg, 1);
}
/* Wait for an RSA operation to complete.
*/
static inline void wait_op_complete(void)
{
while (REG_READ(RSA_QUERY_INTERRUPT_REG) != 1)
{ }
/* clear the interrupt */
REG_WRITE(RSA_CLEAR_INTERRUPT_REG, 1);
}
#endif //CONFIG_IDF_TARGET_ESP32C3

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lib/libesp32_div/ESP32-HomeKit/src/port/bignum_ESP32_C3.h Normal file
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// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#if CONFIG_IDF_TARGET_ESP32C3
#pragma once
#include_next "mbedtls/bignum.h"
#include "sdkconfig.h"
/**
* This is a wrapper for the main mbedtls/bignum.h. This wrapper
* provides a few additional ESP32-only functions.
*
* This is because we don't set MBEDTLS_BIGNUM_ALT in the same way we
* do for AES, SHA, etc. Because we still use most of the bignum.h
* implementation and just replace a few hardware accelerated
* functions (see MBEDTLS_MPI_EXP_MOD_ALT & MBEDTLS_MPI_MUL_MPI_ALT in
* esp_config.h).
*
* @note Unlike the other hardware accelerator support functions in esp32/hwcrypto, there is no
* generic "hwcrypto/bignum.h" header for using these functions without mbedTLS. The reason for this
* is that all of the function implementations depend strongly upon the mbedTLS MPI implementation.
*/
/**
* @brief Lock access to RSA Accelerator (MPI/bignum operations)
*
* RSA Accelerator hardware unit can only be used by one
* consumer at a time.
*
* @note This function is non-recursive (do not call it twice from the
* same task.)
*
* @note You do not need to call this if you are using the mbedTLS bignum.h
* API or esp_mpi_xxx functions. This function is only needed if you
* want to call ROM RSA functions or access the registers directly.
*
*/
void esp_mpi_acquire_hardware(void);
/**
* @brief Unlock access to RSA Accelerator (MPI/bignum operations)
*
* Has to be called once for each call to esp_mpi_acquire_hardware().
*
* @note You do not need to call this if you are using the mbedTLS bignum.h
* API or esp_mpi_xxx functions. This function is only needed if you
* want to call ROM RSA functions or access the registers directly.
*/
void esp_mpi_release_hardware(void);
//#if CONFIG_MBEDTLS_HARDWARE_MPI
/* @brief MPI modular mupltiplication function
*
* Calculates Z = (X * Y) mod M using MPI hardware acceleration.
*
* This is not part of the standard mbedTLS bignum API.
*
* @note All of X, Y & Z should be less than 4096 bit long or an error is returned.
*
* @param Z Result bignum, should be pre-initialised with mbedtls_mpi_init().
* @param X First multiplication argument.
* @param Y Second multiplication argument.
* @param M Modulus value for result.
*
* @return 0 on success, mbedTLS MPI error codes on failure.
*/
int esp_mpi_mul_mpi_mod(mbedtls_mpi *Z, const mbedtls_mpi *X, const mbedtls_mpi *Y, const mbedtls_mpi *M);
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 num_words);
static inline void mpi_to_mem_block(uint32_t mem_base, const mbedtls_mpi *mpi, size_t num_words);
void esp_mpi_mul_mpi_hw_op(const mbedtls_mpi *X, const mbedtls_mpi *Y, size_t num_words);
//#endif // CONFIG_MBEDTLS_HARDWARE_MPI
#endif //CONFIG_IDF_TARGET_ESP32C3

10
lib/libesp32_div/ESP32-HomeKit/src/port/bignum_impl.h
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@ -10,7 +10,7 @@
exponentiation instead.
*/
#define CONFIG_IDF_TARGET_ESP32 1
// #define CONFIG_IDF_TARGET_ESP32 1
#if CONFIG_IDF_TARGET_ESP32
#define ESP_MPI_USE_MONT_EXP
@ -19,7 +19,7 @@
//#define MBEDTLS_MPI_MUL_MPI_ALT
#endif
#if CONFIG_IDF_TARGET_ESP32
int esp_mpi_exp_mod( mbedtls_mpi *Z, const mbedtls_mpi *X, const mbedtls_mpi *Y, const mbedtls_mpi *M, mbedtls_mpi *_Rinv );
/**
@ -86,7 +86,11 @@ int esp_mont_hw_op(mbedtls_mpi* Z, const mbedtls_mpi* X, const mbedtls_mpi* Y, c
*
*/
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 //CONFIG_IDF_TARGET_ESP32
#endif //ESP_MPI_USE_MONT_EXP
#if CONFIG_IDF_TARGET_ESP32C3
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 num_words);
#endif //CONFIG_IDF_TARGET_ESP32C3
#endif

83
lib/libesp32_div/ESP32-HomeKit/src/port/esp_bignum.c
View File

@ -79,7 +79,7 @@ static inline size_t bits_to_words(size_t bits)
/* Return the number of words actually used to represent an mpi
number.
*/
#if defined(MBEDTLS_MPI_EXP_MOD_ALT)
#if defined(MBEDTLS_MPI_EXP_MOD_ALT) || defined(CONFIG_IDF_TARGET_ESP32C3)
static size_t mpi_words(const mbedtls_mpi *mpi)
{
for (size_t i = mpi->n; i > 0; i--) {
@ -369,6 +369,87 @@ cleanup:
#endif /* MBEDTLS_MPI_EXP_MOD_ALT */
#if CONFIG_IDF_TARGET_ESP32C3
int esp_mpi_exp_mod( mbedtls_mpi *Z, const mbedtls_mpi *X, const mbedtls_mpi *Y, const mbedtls_mpi *M, mbedtls_mpi *_Rinv )
{
int ret = 0;
size_t x_words = mpi_words(X);
size_t y_words = mpi_words(Y);
size_t m_words = mpi_words(M);
/* "all numbers must be the same length", so choose longest number
as cardinal length of operation...
*/
size_t num_words = esp_mpi_hardware_words(MAX(m_words, MAX(x_words, y_words)));
mbedtls_mpi Rinv_new; /* used if _Rinv == NULL */
mbedtls_mpi *Rinv; /* points to _Rinv (if not NULL) othwerwise &RR_new */
mbedtls_mpi_uint Mprime;
if (mbedtls_mpi_cmp_int(M, 0) <= 0 || (M->p[0] & 1) == 0) {
return MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
}
if (mbedtls_mpi_cmp_int(Y, 0) < 0) {
return MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
}
if (mbedtls_mpi_cmp_int(Y, 0) == 0) {
return mbedtls_mpi_lset(Z, 1);
}
if (num_words * 32 > SOC_RSA_MAX_BIT_LEN) {
return MBEDTLS_ERR_MPI_NOT_ACCEPTABLE;
}
/* Determine RR pointer, either _RR for cached value
or local RR_new */
if (_Rinv == NULL) {
mbedtls_mpi_init(&Rinv_new);
Rinv = &Rinv_new;
} else {
Rinv = _Rinv;
}
if (Rinv->p == NULL) {
MBEDTLS_MPI_CHK(calculate_rinv(Rinv, M, num_words));
}
Mprime = modular_inverse(M);
// Montgomery exponentiation: Z = X ^ Y mod M (HAC 14.94)
#ifdef ESP_MPI_USE_MONT_EXP
ret = mpi_montgomery_exp_calc(Z, X, Y, M, Rinv, num_words, Mprime) ;
MBEDTLS_MPI_CHK(ret);
#else
esp_mpi_enable_hardware_hw_op();
esp_mpi_exp_mpi_mod_hw_op(X, Y, M, Rinv, Mprime, num_words);
ret = mbedtls_mpi_grow(Z, m_words);
if (ret != 0) {
esp_mpi_disable_hardware_hw_op();
goto cleanup;
}
esp_mpi_read_result_hw_op(Z, m_words);
esp_mpi_disable_hardware_hw_op();
#endif
// Compensate for negative X
if (X->s == -1 && (Y->p[0] & 1) != 0) {
Z->s = -1;
MBEDTLS_MPI_CHK(mbedtls_mpi_add_mpi(Z, M, Z));
} else {
Z->s = 1;
}
cleanup:
if (_Rinv == NULL) {
mbedtls_mpi_free(&Rinv_new);
}
return ret;
}
#endif //CONFIG_IDF_TARGET_ESP32C3
#if defined(MBEDTLS_MPI_MUL_MPI_ALT) /* MBEDTLS_MPI_MUL_MPI_ALT */