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Wipe flash on clear.

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Some files might be critical and contain sensitive secure material. Wipe just in case.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2026-06-21 20:02:15 +02:00
parent e322dc9ad4
commit 14191e1aee
1 changed files with 6 additions and 0 deletions
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src/fs/file.c
+6
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@@ -537,6 +537,12 @@ int flash_clear_file(file_t *file) {
//printf("nc %lx->%lx %lx->%lx\n",prev_addr,flash_read_uintptr(prev_addr),base_addr,next_addr);
flash_program_uintptr(prev_addr, next_addr);
flash_program_halfword((uintptr_t) file->data, 0);
uint16_t len = file_get_size(file);
if (len > 0) {
uint8_t *zr = (uint8_t *)calloc(1, len);
flash_program_block((uintptr_t) file->data + sizeof(uint16_t), zr, len);
free(zr);
}
if (next_addr > 0) {
flash_program_uintptr(next_addr + sizeof(uintptr_t), prev_addr);
}