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fix(nimble): Replace sensitive vsprintf with hex character

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This commit is contained in:
Rahul Tank
2026-05-12 16:22:50 +05:30
parent aa5775e933
commit 5d8b70207a
1 changed files with 5 additions and 3 deletions
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nimble/host/src/ble_hs_log.c
+5 -3
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@@ -17,7 +17,6 @@
* under the License. * under the License.
*/ */
#include <stdio.h>
#include "os/os.h" #include "os/os.h"
#include "sdkconfig.h" #include "sdkconfig.h"
#include "host/ble_hs.h" #include "host/ble_hs.h"
@@ -30,7 +29,8 @@ struct log ble_hs_log;
static void static void
ble_hs_log_debug_hex_chunk(const uint8_t *bytes, int len) ble_hs_log_debug_hex_chunk(const uint8_t *bytes, int len)
{ {
char hex_str[31] = {0}; // 10 bytes * 3 chars ("FF ") + 1 null = 31 static const char hex_chars[] = "0123456789abcdef";
char hex_str[31] = {0}; // 10 bytes * 3 chars ("ff ") + 1 null = 31
int offset = 0; int offset = 0;
if (len <= 0) { if (len <= 0) {
@@ -42,7 +42,9 @@ ble_hs_log_debug_hex_chunk(const uint8_t *bytes, int len)
} }
for (int i = 0; i < len; i++) { for (int i = 0; i < len; i++) {
offset += snprintf(hex_str + offset, sizeof(hex_str) - offset, "%02x ", bytes[i]); hex_str[offset++] = hex_chars[bytes[i] >> 4];
hex_str[offset++] = hex_chars[bytes[i] & 0x0f];
hex_str[offset++] = ' ';
} }
BLE_HS_LOG(DEBUG, "%s", hex_str); BLE_HS_LOG(DEBUG, "%s", hex_str);