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fix(mbedtls): use pointer-width types for dynamic buffer msg offsets

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This commit is contained in:
Ashish Sharma
2026-07-23 11:18:20 +08:00
parent 94e538c2dc
commit 9c72f7a642
1 changed files with 14 additions and 8 deletions
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22
components/mbedtls/port/dynamic/esp_mbedtls_dynamic_impl.c
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@@ -5,6 +5,8 @@
*/
#include <string.h>
#include <stddef.h>
#include <stdint.h>
#include "esp_mbedtls_dynamic_impl.h"
#include "sdkconfig.h"
@@ -85,7 +87,7 @@ static void init_tx_buffer(mbedtls_ssl_context *ssl, unsigned char *buf)
* In mbedtls, ssl->MBEDTLS_PRIVATE(out_msg) = ssl->MBEDTLS_PRIVATE(out_buf) + offset;
*/
if (!buf) {
int out_msg_off = (int)ssl->MBEDTLS_PRIVATE(out_msg) - (int)ssl->MBEDTLS_PRIVATE(out_buf);
ptrdiff_t out_msg_off = ssl->MBEDTLS_PRIVATE(out_msg) - ssl->MBEDTLS_PRIVATE(out_buf);
if (!out_msg_off) {
out_msg_off = MBEDTLS_SSL_HEADER_LEN;
@@ -96,9 +98,11 @@ static void init_tx_buffer(mbedtls_ssl_context *ssl, unsigned char *buf)
ssl->MBEDTLS_PRIVATE(out_hdr) = NULL;
ssl->MBEDTLS_PRIVATE(out_len) = NULL;
ssl->MBEDTLS_PRIVATE(out_iv) = NULL;
ssl->MBEDTLS_PRIVATE(out_msg) = (unsigned char *)out_msg_off;
/* Stash the offset in the pointer field while the buffer is freed; it is
* restored to a real pointer on the next allocation below. */
ssl->MBEDTLS_PRIVATE(out_msg) = (unsigned char *)(uintptr_t)out_msg_off;
} else {
int out_msg_off = (int)ssl->MBEDTLS_PRIVATE(out_msg);
uintptr_t out_msg_off = (uintptr_t)ssl->MBEDTLS_PRIVATE(out_msg);
ssl->MBEDTLS_PRIVATE(out_buf) = buf;
ssl->MBEDTLS_PRIVATE(out_ctr) = ssl->MBEDTLS_PRIVATE(out_buf);
@@ -107,7 +111,7 @@ static void init_tx_buffer(mbedtls_ssl_context *ssl, unsigned char *buf)
ssl->MBEDTLS_PRIVATE(out_iv) = ssl->MBEDTLS_PRIVATE(out_buf) + MBEDTLS_SSL_HEADER_LEN;
ssl->MBEDTLS_PRIVATE(out_msg) = ssl->MBEDTLS_PRIVATE(out_buf) + out_msg_off;
ESP_LOGV(TAG, "out msg offset is %d", out_msg_off);
ESP_LOGV(TAG, "out msg offset is %u", (unsigned)out_msg_off);
}
ssl->MBEDTLS_PRIVATE(out_msgtype) = 0;
@@ -121,7 +125,7 @@ static void init_rx_buffer(mbedtls_ssl_context *ssl, unsigned char *buf)
* In mbedtls, ssl->MBEDTLS_PRIVATE(in_msg) = ssl->MBEDTLS_PRIVATE(in_buf) + offset;
*/
if (!buf) {
int in_msg_off = (int)ssl->MBEDTLS_PRIVATE(in_msg) - (int)ssl->MBEDTLS_PRIVATE(in_buf);
ptrdiff_t in_msg_off = ssl->MBEDTLS_PRIVATE(in_msg) - ssl->MBEDTLS_PRIVATE(in_buf);
if (!in_msg_off) {
in_msg_off = MBEDTLS_SSL_HEADER_LEN;
@@ -132,9 +136,11 @@ static void init_rx_buffer(mbedtls_ssl_context *ssl, unsigned char *buf)
ssl->MBEDTLS_PRIVATE(in_hdr) = NULL;
ssl->MBEDTLS_PRIVATE(in_len) = NULL;
ssl->MBEDTLS_PRIVATE(in_iv) = NULL;
ssl->MBEDTLS_PRIVATE(in_msg) = (unsigned char *)in_msg_off;
/* Stash the offset in the pointer field while the buffer is freed; it is
* restored to a real pointer on the next allocation below. */
ssl->MBEDTLS_PRIVATE(in_msg) = (unsigned char *)(uintptr_t)in_msg_off;
} else {
int in_msg_off = (int)ssl->MBEDTLS_PRIVATE(in_msg);
uintptr_t in_msg_off = (uintptr_t)ssl->MBEDTLS_PRIVATE(in_msg);
ssl->MBEDTLS_PRIVATE(in_buf) = buf;
ssl->MBEDTLS_PRIVATE(in_ctr) = ssl->MBEDTLS_PRIVATE(in_buf);
@@ -143,7 +149,7 @@ static void init_rx_buffer(mbedtls_ssl_context *ssl, unsigned char *buf)
ssl->MBEDTLS_PRIVATE(in_iv) = ssl->MBEDTLS_PRIVATE(in_buf) + MBEDTLS_SSL_HEADER_LEN;
ssl->MBEDTLS_PRIVATE(in_msg) = ssl->MBEDTLS_PRIVATE(in_buf) + in_msg_off;
ESP_LOGV(TAG, "in msg offset is %d", in_msg_off);
ESP_LOGV(TAG, "in msg offset is %u", (unsigned)in_msg_off);
}
ssl->MBEDTLS_PRIVATE(in_msgtype) = 0;