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Fix regression for regular nested attack

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noproto 2024-09-02 10:28:50 -04:00
parent 90d0c3d095
commit 2abeb071fd
2 changed files with 10 additions and 2 deletions
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10
lib/nfc/protocols/mf_classic/mf_classic_poller.c
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@ -1770,13 +1770,20 @@ NfcCommand mf_classic_poller_handler_nested_controller(MfClassicPoller* instance
// TODO: Need to think about how this works for NXP/Fudan backdoored tags.
// We could reset the .calibration field every sector to re-calibrate. Calibration function handles backdoor calibration too.
// Calibration
bool initial_collect_nt_enc_iter = false;
if(!(dict_attack_ctx->calibrated)) {
if(dict_attack_ctx->prng_type == MfClassicPrngTypeWeak) {
instance->state = MfClassicPollerStateNestedCalibrate;
return command;
}
initial_collect_nt_enc_iter = true;
dict_attack_ctx->auth_passed = true;
dict_attack_ctx->current_key_checked = false;
dict_attack_ctx->nested_phase = MfClassicNestedPhaseCollectNtEnc;
} else if(dict_attack_ctx->nested_phase == MfClassicNestedPhaseCalibrate) {
initial_collect_nt_enc_iter = true;
dict_attack_ctx->auth_passed = true;
dict_attack_ctx->current_key_checked = false;
dict_attack_ctx->nested_phase = MfClassicNestedPhaseCollectNtEnc;
}
// Collect and log nonces
@ -1807,7 +1814,7 @@ NfcCommand mf_classic_poller_handler_nested_controller(MfClassicPoller* instance
if(!(dict_attack_ctx->auth_passed)) {
dict_attack_ctx->attempt_count++;
} else {
if(is_weak) {
if(is_weak && !(initial_collect_nt_enc_iter)) {
dict_attack_ctx->nested_target_key++;
if(dict_attack_ctx->nested_target_key % 2 == 0) {
dict_attack_ctx->current_key_checked = false;
@ -1850,6 +1857,7 @@ NfcCommand mf_classic_poller_handler_nested_controller(MfClassicPoller* instance
}
dict_attack_ctx->attempt_count = 0;
}
dict_attack_ctx->auth_passed = false;
instance->state = MfClassicPollerStateNestedCollectNtEnc;
return command;
}

2
lib/nfc/protocols/mf_classic/mf_classic_poller_i.h
View File

@ -19,7 +19,7 @@ extern "C" {
#define NFC_ASSETS_FOLDER EXT_PATH("nfc/assets")
#define MF_CLASSIC_NESTED_ANALYZE_NT_COUNT (5)
#define MF_CLASSIC_NESTED_NT_HARD_MINIMUM (3)
#define MF_CLASSIC_NESTED_RETRY_MAXIMUM (20)
#define MF_CLASSIC_NESTED_RETRY_MAXIMUM (60)
#define MF_CLASSIC_NESTED_HARD_RETRY_MAXIMUM (3)
#define MF_CLASSIC_NESTED_CALIBRATION_COUNT (21)
#define MF_CLASSIC_NESTED_LOGS_FILE_NAME ".nested.log"