ESP-IDF
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Outline
#include "esp_srp_mpi.h"
esp_mpi_new()
esp_mpi_new_from_hex(const char *)
esp_mpi_new_from_bin(const char *, int)
esp_mpi_free(esp_mpi_t *)
esp_mpi_ctx_new()
esp_mpi_ctx_free(esp_mpi_ctx_t *)
esp_mpi_sizeof(esp_mpi_t *)
esp_mpi_to_bin(esp_mpi_t *, int *)
esp_get_random(void *, unsigned char *, size_t)
esp_mpi_get_rand(esp_mpi_t *, int, int, int)
esp_mpi_a_exp_b_mod_c(esp_mpi_t *, esp_mpi_t *, esp_mpi_t *, esp_mpi_t *, esp_mpi_ctx_t *)
esp_mpi_a_mul_b_mod_c(esp_mpi_t *, esp_mpi_t *, esp_mpi_t *, esp_mpi_t *, esp_mpi_ctx_t *)
esp_mpi_a_add_b_mod_c(esp_mpi_t *, esp_mpi_t *, esp_mpi_t *, esp_mpi_t *, esp_mpi_ctx_t *)
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/protocomm/src/crypto/srp6a/esp_srp_mpi.c
 
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/* * SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ #include "esp_srp_mpi.h" esp_mpi_t *esp_mpi_new(void) { esp_mpi_t *a = (esp_mpi_t *)malloc(sizeof (esp_mpi_t)); if (!a) { return NULL; }{...} mbedtls_mpi_init(a); return a; }{ ... } esp_mpi_t *esp_mpi_new_from_hex(const char *hex) { esp_mpi_t *a = esp_mpi_new(); if (!a) { return NULL; }{...} int ret = mbedtls_mpi_read_string(a, 16, hex); if (ret != 0) { printf("mbedtls_mpi_read_string() failed, returned %x\n", ret); esp_mpi_free(a); return NULL; }{...} return a; }{ ... } esp_mpi_t *esp_mpi_new_from_bin(const char *str, int str_len) { esp_mpi_t *a = esp_mpi_new(); if (!a) { return NULL; }{...} int ret = mbedtls_mpi_read_binary(a, (unsigned char *)str, str_len); if (ret != 0) { printf("mbedtls_mpi_read_binary() failed, returned %x\n", ret); esp_mpi_free(a); return NULL; }{...} return a; }{ ... } void esp_mpi_free(esp_mpi_t *bn) { if (bn) { mbedtls_mpi_free(bn); free(bn); }{...} }{ ... } esp_mpi_ctx_t *esp_mpi_ctx_new(void) { esp_mpi_t *bn = esp_mpi_new(); return ( esp_mpi_ctx_t *)bn; }{ ... } void esp_mpi_ctx_free(esp_mpi_ctx_t *ctx) { esp_mpi_free((esp_mpi_t *)ctx); }{ ... } unsigned int esp_mpi_sizeof(esp_mpi_t *bn) { return mbedtls_mpi_size(bn); }{ ... } char *esp_mpi_to_bin(esp_mpi_t *bn, int *len) { *len = esp_mpi_sizeof(bn); char *p = malloc(*len); if (!p) { return NULL; }{...} int ret = mbedtls_mpi_write_binary(bn, (unsigned char *)p, *len); if (ret != 0) { printf("mbedtls_mpi_read_string() failed, returned %x\n", ret); free(p); return NULL; }{...} return p; }{ ... } int esp_get_random(void *ctx, unsigned char *data, size_t len) { (void) ctx; esp_fill_random(data, len); return 0; }{ ... } int esp_mpi_get_rand(esp_mpi_t *bn, int bits, int top, int bottom) { (void) top; (void) bottom; return mbedtls_mpi_fill_random(bn, bits / 8, esp_get_random, NULL); }{ ... } int esp_mpi_a_exp_b_mod_c(esp_mpi_t *result, esp_mpi_t *a, esp_mpi_t *b, esp_mpi_t *c, esp_mpi_ctx_t *ctx) { return mbedtls_mpi_exp_mod(result, a, b, c, (esp_mpi_t *) ctx); }{ ... } int esp_mpi_a_mul_b_mod_c(esp_mpi_t *result, esp_mpi_t *a, esp_mpi_t *b, esp_mpi_t *c, esp_mpi_ctx_t *ctx) { (void) ctx; int res; mbedtls_mpi t; mbedtls_mpi_init(&t); res = mbedtls_mpi_mul_mpi(&t, a, b); if (res != 0) { printf("mbedtls_mpi_mul_mpi(), returned %x\n", res); return res; }{...} res = mbedtls_mpi_mod_mpi(result, &t, c); if (res != 0) { printf("mbedtls_mpi_mod_mpi() failed, returned %x\n", res); return res; }{...} mbedtls_mpi_free(&t); return res; }{ ... } int esp_mpi_a_add_b_mod_c(esp_mpi_t *result, esp_mpi_t *a, esp_mpi_t *b, esp_mpi_t *c, esp_mpi_ctx_t *ctx) { (void) ctx; int res; mbedtls_mpi t; mbedtls_mpi_init(&t); res = mbedtls_mpi_add_mpi(&t, a, b); if (res != 0) { printf("mbedtls_mpi_add_mpi() failed, returned %x\n", res); return res; }{...} res = mbedtls_mpi_mod_mpi(result, &t, c); if (res != 0) { printf("mbedtls_mpi_mod_mpi(), returned %x\n", res); return res; }{...} mbedtls_mpi_free(&t); return res; }{ ... }
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