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bootloader_support: don't check signature when JTAG is attached

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If an insecure configuration is enabled (no hardware secure boot, just
software signature check), skip the signature check in bootloader if
JTAG debugger is attached. This allows the debugger to set breakpoints
in Flash before the application runs.

Closes https://github.com/espressif/esp-idf/issues/4734
Closes https://github.com/espressif/esp-idf/issues/4878
This commit is contained in:
Ivan Grokhotkov 2020-03-04 15:46:03 +01:00
parent 96ad552245
commit 93a3beafb8
1 changed files with 11 additions and 2 deletions
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13
components/bootloader_support/src/esp_image_format.c
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@ -220,8 +220,17 @@ static esp_err_t image_load(esp_image_load_mode_t mode, const esp_partition_pos_
#ifdef SECURE_BOOT_CHECK_SIGNATURE
// secure boot images have a signature appended
err = verify_secure_boot_signature(sha_handle, data, image_digest, verified_digest);
#else
#if defined(BOOTLOADER_BUILD) && !defined(CONFIG_SECURE_BOOT)
// If secure boot is not enabled in hardware, then
// skip the signature check in bootloader when the debugger is attached.
// This is done to allow for breakpoints in Flash.
if (!esp_cpu_in_ocd_debug_mode()) {
#else // CONFIG_SECURE_BOOT
if (true) {
#endif // end checking for JTAG
err = verify_secure_boot_signature(sha_handle, data, image_digest, verified_digest);
}
#else // SECURE_BOOT_CHECK_SIGNATURE
// No secure boot, but SHA-256 can be appended for basic corruption detection
if (sha_handle != NULL && !esp_cpu_in_ocd_debug_mode()) {
err = verify_simple_hash(sha_handle, data);