esp32c2: Remove assert check on len for SHA calculation
@@ -24,7 +24,11 @@ bootloader_sha256_handle_t bootloader_sha256_start()
void bootloader_sha256_data(bootloader_sha256_handle_t handle, const void *data, size_t data_len)
{
assert(handle != NULL);
- assert(data_len % 4 == 0);
+ /* C2 secure boot key field consists of 1 byte of curve identifier and 64 bytes of ECDSA public key.
+ * While verifying the signature block, we need to calculate the SHA of this key field which is of 65 bytes.
+ * ets_sha_update handles it cleanly so we can safely remove the check:
+ * assert(data_len % 4) == 0
+ */
ets_sha_update(&ctx, data, data_len, false);
}
