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fix(mbedtls/port): Fix some divide-by-zero and deadcode coverity checks

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This commit is contained in:
harshal.patil 2024-05-20 13:49:31 +05:30
parent 098abb5993
commit 7c7c33ecbd
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GPG Key ID: 5B5EC97C35B9A2E5
3 changed files with 16 additions and 8 deletions
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4
components/mbedtls/port/aes/dma/esp_aes_dma_core.c
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@ -452,7 +452,7 @@ static esp_err_t generate_descriptor_list(const uint8_t *buffer, const size_t le
// add start alignment node to the DMA linked list
dma_desc_populate(dma_descriptors, start_alignment_stream_buffer, unaligned_start_bytes, max_desc_size, populated_dma_descs);
populated_dma_descs += (unaligned_start_bytes ? 1 : 0);
populated_dma_descs += 1;
}
if (aligned_block_bytes) {
@ -474,7 +474,7 @@ static esp_err_t generate_descriptor_list(const uint8_t *buffer, const size_t le
// add end alignment node to the DMA linked list
dma_desc_populate(dma_descriptors, end_alignment_stream_buffer, unaligned_end_bytes, max_desc_size, populated_dma_descs);
populated_dma_descs += (unaligned_end_bytes ? 1 : 0);
populated_dma_descs += 1;
}
if (dma_desc_link(dma_descriptors, dma_descs_needed, cache_line_size) != ESP_OK) {

10
components/mbedtls/port/bignum/esp_bignum.c
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@ -6,7 +6,7 @@
*
* SPDX-License-Identifier: Apache-2.0
*
* SPDX-FileContributor: 2016-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileContributor: 2016-2024 Espressif Systems (Shanghai) CO LTD
*/
#include <stdio.h>
#include <string.h>
@ -41,7 +41,7 @@
* bignum. This number may be less than the size of the bignum
*
* - Naming convention hw_words for the hardware length of the operation. This number maybe be rounded up
* for targets that requres this (e.g. ESP32), and may be larger than any of the numbers
* for targets that requires this (e.g. ESP32), and may be larger than any of the numbers
* involved in the calculation.
*
* - Timing behaviour of these functions will depend on the length of the inputs. This is fundamentally
@ -359,7 +359,7 @@ static int esp_mpi_exp_mod( mbedtls_mpi *Z, const mbedtls_mpi *X, const mbedtls_
int ret = 0;
mbedtls_mpi Rinv_new; /* used if _Rinv == NULL */
mbedtls_mpi *Rinv; /* points to _Rinv (if not NULL) othwerwise &RR_new */
mbedtls_mpi *Rinv; /* points to _Rinv (if not NULL) otherwise &RR_new */
mbedtls_mpi_uint Mprime;
size_t x_words = mpi_words(X);
@ -502,8 +502,8 @@ int mbedtls_mpi_mul_mpi( mbedtls_mpi *Z, const mbedtls_mpi *X, const mbedtls_mpi
argument is zero or one.
*/
if (x_bits == 0 || y_bits == 0) {
mbedtls_mpi_lset(Z, 0);
return 0;
ret = mbedtls_mpi_lset(Z, 0);
return ret;
}
if (x_bits == 1) {
ret = mbedtls_mpi_copy(Z, Y);

10
components/mbedtls/port/sha/dma/sha.c
View File

@ -156,6 +156,8 @@ static void esp_sha_block_mode(esp_sha_type sha_type, const uint8_t *input, uint
int num_block = 0;
blk_len = block_length(sha_type);
assert(blk_len != 0);
blk_word_len = blk_len / 4;
num_block = ilen / blk_len;
@ -236,7 +238,13 @@ static esp_err_t esp_sha_dma_process(esp_sha_type sha_type, const void *input, u
{
int ret = 0;
crypto_dma_desc_t *dma_descr_head = NULL;
size_t num_blks = (ilen + buf_len) / block_length(sha_type);
size_t blk_len = block_length(sha_type);
if (blk_len == 0) {
ESP_LOGE(TAG, "Unsupported SHA type");
return ESP_FAIL;
}
size_t num_blks = (ilen + buf_len) / blk_len;
memset(&s_dma_descr_input, 0, sizeof(crypto_dma_desc_t));
memset(&s_dma_descr_buf, 0, sizeof(crypto_dma_desc_t));