X-Git-Url: https://git.cryptolib.org/?p=labortage2013badge.git;a=blobdiff_plain;f=firmware%2Fmain.c;h=53898b05ea0f5ccef6e9bfe7a1a71c36973b0533;hp=a266a59a8ec61ba3b9c6a4fb9d764495fc9ad9ee;hb=bb8b3d49a5a36eb1e52b79429fe7513425d02fc3;hpb=b5f34edfe75543109080c5557b20a5dea8446f27 diff --git a/firmware/main.c b/firmware/main.c index a266a59..53898b0 100644 --- a/firmware/main.c +++ b/firmware/main.c @@ -38,8 +38,8 @@ different port or bit, change the macros below: #include "oddebug.h" /* This is also an example for using debug macros */ #include "requests.h" /* The custom request numbers we use */ #include "special_functions.h" - -void update_pwm(void); +#include "hotp.h" +#include "percnt2.h" /* ------------------------------------------------------------------------- */ /* ----------------------------- USB interface ----------------------------- */ @@ -79,6 +79,11 @@ PROGMEM const char usbHidReportDescriptor[USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH] 0xc0 // END_COLLECTION }; +uint16_t secret_length_ee EEMEM = 0; +uint8_t secret_ee[32] EEMEM; +uint8_t reset_counter_ee EEMEM = 0; +uint8_t digits_ee EEMEM = 8; + /* Keyboard usage values, see usb.org's HID-usage-tables document, chapter * 10 Keyboard/Keypad Page for more codes. */ @@ -145,10 +150,14 @@ PROGMEM const char usbHidReportDescriptor[USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH] #define CAPS_LOCK 2 #define SCROLL_LOCK 4 +static uint8_t dbg_buffer[8]; -#define UNI_BUFFER_SIZE 16 +static uint8_t secret[32]; +static uint16_t secret_length_b; +static char token[10]; -static uint8_t dbg_buffer[8]; + +#define UNI_BUFFER_SIZE 36 static union { uint8_t w8[UNI_BUFFER_SIZE]; @@ -169,6 +178,7 @@ typedef struct { #define STATE_WAIT 0 #define STATE_SEND_KEY 1 #define STATE_RELEASE_KEY 2 +#define STATE_NEXT 3 static keyboard_report_t keyboard_report; // sent to PC @@ -177,28 +187,100 @@ static uchar key_state = STATE_WAIT; volatile static uchar LED_state = 0xff; // received from PC /* ------------------------------------------------------------------------- */ +void memory_clean(void) { + memset(secret, 0, 32); + secret_length_b = 0; +} + +uint8_t secret_set(void){ + uint8_t r; + union { + uint8_t w8[32]; + uint16_t w16[16]; + } read_back; + const uint8_t length_B = (secret_length_b + 7) / 8; + + eeprom_busy_wait(); + eeprom_write_block(secret, secret_ee, length_B); + eeprom_busy_wait(); + eeprom_read_block(read_back.w8, secret_ee, length_B); + r = memcmp(secret, read_back.w8, length_B); + memory_clean(); + memset(read_back.w8, 0, 32); + if (r) { + return 1; + } + eeprom_busy_wait(); + eeprom_write_word(&secret_length_ee, secret_length_b); + eeprom_busy_wait(); + r = eeprom_read_word(&secret_length_ee) == secret_length_b; + memory_clean(); + *read_back.w16 = 0; + if (!r) { + return 1; + } + return 0; +} + +void token_generate(void) { + percnt_inc(0); + eeprom_busy_wait(); + eeprom_read_block(secret, secret_ee, 32); + eeprom_busy_wait(); + hotp(token, secret, eeprom_read_word(&secret_length_ee), percnt_get(0), eeprom_read_byte(&digits_ee)); + memory_clean(); +} + +void counter_reset(void) { + uint8_t reset_counter; + eeprom_busy_wait(); + reset_counter = eeprom_read_byte(&reset_counter_ee); + percnt_reset(0); + eeprom_busy_wait(); + eeprom_write_byte(&reset_counter_ee, reset_counter + 1); +} + +void counter_init(void) { + eeprom_busy_wait(); + if (eeprom_read_byte(&reset_counter_ee) == 0) { + counter_reset(); + } + percnt_init(0); +} + void buildReport(uchar send_key) { keyboard_report.modifier = 0; - if(send_key >= 'a' && send_key <= 'z') - keyboard_report.keycode[0] = 4 + (send_key - 'a'); - else + switch (send_key) { + case 'A' ... 'Z': + keyboard_report.modifier = MOD_SHIFT_LEFT; + keyboard_report.keycode[0] = KEY_A + (send_key-'A'); + break; + case 'a' ... 'z': + keyboard_report.keycode[0] = KEY_A + (send_key-'a'); + break; + case '1' ... '9': + keyboard_report.keycode[0] = KEY_1 + (send_key-'1'); + break; + case '0': + keyboard_report.keycode[0] = KEY_0; + break; + default: keyboard_report.keycode[0] = 0; + } } -uint8_t read_button(void){ - uint8_t t,v=0; - t = DDRB; - DDRB &= ~(1<>= BUTTON_PIN; - v &= 1; - v ^= 1; - return v; +static inline +int8_t button_get_debounced(uint8_t debounce_count) { + uint8_t v; + v = PINB & _BV(BUTTON_PIN); + while (debounce_count-- && v == (PINB & _BV(BUTTON_PIN))) { + ; + } + if (debounce_count) { + return -1; + } + return v ? 0 : 1; } void init_temperature_sensor(void){ @@ -242,6 +324,45 @@ usbMsgLen_t usbFunctionSetup(uchar data[8]) current_command = rq->bRequest; switch(rq->bRequest) { + case CUSTOM_RQ_SET_SECRET: + secret_length_b = rq->wValue.word; + if (secret_length_b > 256) { + secret_length_b = 256; + } + uni_buffer.w8[0] = 0; + return USB_NO_MSG; + case CUSTOM_RQ_INC_COUNTER: + percnt_inc(0); + return 0; + case CUSTOM_RQ_GET_COUNTER: + uni_buffer.w32[0] = percnt_get(0); + usbMsgPtr = (usbMsgPtr_t)uni_buffer.w32; + return 4; + case CUSTOM_RQ_RESET_COUNTER: + counter_reset(); + return 0; + case CUSTOM_RQ_GET_RESET_COUNTER: + eeprom_busy_wait(); + uni_buffer.w8[0] = eeprom_read_byte(&reset_counter_ee); + usbMsgPtr = uni_buffer.w8; + return 1; + case CUSTOM_RQ_SET_DIGITS: + if (rq->wValue.bytes[0] > 9) { + rq->wValue.bytes[0] = 9; + } + eeprom_busy_wait(); + eeprom_write_byte(&digits_ee, rq->wValue.bytes[0]); + return 0; + case CUSTOM_RQ_GET_DIGITS: + eeprom_busy_wait(); + uni_buffer.w8[0] = eeprom_read_byte(&digits_ee); + usbMsgPtr = uni_buffer.w8; + return 1; + case CUSTOM_RQ_GET_TOKEN: + token_generate(); + usbMsgPtr = (usbMsgPtr_t)token; + return strlen(token); + case CUSTOM_RQ_PRESS_BUTTON: key_state = STATE_SEND_KEY; return 0; @@ -263,19 +384,20 @@ usbMsgLen_t usbFunctionSetup(uchar data[8]) return rq->wLength.word; case CUSTOM_RQ_WRITE_MEM: case CUSTOM_RQ_EXEC_SPM: - uni_buffer_fill = 4; +/* uni_buffer_fill = 4; uni_buffer.w16[0] = rq->wValue.word; uni_buffer.w16[1] = rq->wLength.word; return USB_NO_MSG; - case CUSTOM_RQ_READ_FLASH: +*/ case CUSTOM_RQ_READ_FLASH: uni_buffer.w16[0] = rq->wValue.word; uni_buffer.w16[1] = rq->wLength.word; + uni_buffer_fill = 4; return USB_NO_MSG; case CUSTOM_RQ_RESET: soft_reset((uint8_t)(rq->wValue.word)); break; case CUSTOM_RQ_READ_BUTTON: - uni_buffer.w8[0] = read_button(); + uni_buffer.w8[0] = button_get_debounced(25); usbMsgPtr = uni_buffer.w8; return 1; case CUSTOM_RQ_READ_TMPSENS: @@ -297,6 +419,18 @@ uchar usbFunctionWrite(uchar *data, uchar len) if (data[0] != LED_state) LED_state = data[0]; return 1; // Data read, not expecting more + case CUSTOM_RQ_SET_SECRET: + { + if (uni_buffer.w8[0] < (secret_length_b + 7) / 8) { + memcpy(&secret[uni_buffer.w8[0]], data, len); + uni_buffer.w8[0] += len; + } + if (uni_buffer.w8[0] >= (secret_length_b + 7) / 8) { + secret_set(); + return 1; + } + return 0; + } case CUSTOM_RQ_SET_DBG: if(len > sizeof(dbg_buffer)){ len = sizeof(dbg_buffer); @@ -390,7 +524,8 @@ void usbEventResetReady(void) int main(void) { - uchar i; + size_t idx = 0; + int8_t i = 0, last_stable_button_state = 0; wdt_enable(WDTO_1S); /* Even if you don't use the watchdog, turn it off here. On newer devices, @@ -401,36 +536,47 @@ int main(void) * additional hardware initialization. */ - memset(&keyboard_report, 0, sizeof(keyboard_report)); - + DDRB &= ~_BV(BUTTON_PIN); /* make button pin input */ + PORTB |= _BV(BUTTON_PIN); /* turn on pull-up resistor */ init_temperature_sensor(); usbInit(); usbDeviceDisconnect(); /* enforce re-enumeration, do this while interrupts are disabled! */ - i = 0; while(--i){ /* fake USB disconnect for ~512 ms */ wdt_reset(); _delay_ms(2); } usbDeviceConnect(); - LED_PORT_DDR |= _BV(R_BIT) | _BV(G_BIT) | _BV(B_BIT); /* make the LED bit an output */ - sei(); for(;;){ /* main event loop */ - // update_pwm(); - wdt_reset(); usbPoll(); + i = button_get_debounced(25); + if (i != -1) { + if (last_stable_button_state == 0 && i == 1) { + key_state = STATE_SEND_KEY; + } + last_stable_button_state = i; + } + if(usbInterruptIsReady() && key_state != STATE_WAIT){ switch(key_state) { case STATE_SEND_KEY: - buildReport('x'); + buildReport(token[idx]); key_state = STATE_RELEASE_KEY; // release next break; case STATE_RELEASE_KEY: buildReport(0); + ++idx; + if (token[idx] == '\0') { + idx = 0; + key_state = STATE_WAIT; + } else { + key_state = STATE_SEND_KEY; + } + break; default: key_state = STATE_WAIT; // should not happen }