mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-20 15:26:13 +08:00
825 lines
18 KiB
C
825 lines
18 KiB
C
//-----------------------------------------------------------------------------
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// Willok, June 2018
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// Edits by Iceman, July 2018
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// The main i2c code, for communications with smart card module
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//-----------------------------------------------------------------------------
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#include "i2c.h"
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#define GPIO_RST AT91C_PIO_PA1
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#define GPIO_SCL AT91C_PIO_PA5
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#define GPIO_SDA AT91C_PIO_PA7
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#define SCL_H HIGH(GPIO_SCL)
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#define SCL_L LOW(GPIO_SCL)
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#define SDA_H HIGH(GPIO_SDA)
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#define SDA_L LOW(GPIO_SDA)
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#define SCL_read (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SCL)
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#define SDA_read (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SDA)
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#define I2C_ERROR "I2C_WaitAck Error"
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volatile unsigned long c;
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// 直接使用循环来延时，一个循环 6 条指令，48M， Delay=1 大概为 200kbps
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// timer.
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// I2CSpinDelayClk(4) = 12.31us
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// I2CSpinDelayClk(1) = 3.07us
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void __attribute__((optimize("O0"))) I2CSpinDelayClk(uint16_t delay) {
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for (c = delay * 2; c; c--) {};
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}
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#define I2C_DELAY_1CLK I2CSpinDelayClk(1)
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#define I2C_DELAY_2CLK I2CSpinDelayClk(2)
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#define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
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#define ISO7618_MAX_FRAME 255
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// try i2c bus recovery at 100kHz = 5uS high, 5uS low
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void I2C_recovery(void) {
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DbpString("Performing i2c bus recovery");
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// reset I2C
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SDA_H;
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SCL_H;
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//9nth cycle acts as NACK
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for (int i = 0; i < 10; i++) {
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SCL_H;
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WaitUS(5);
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SCL_L;
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WaitUS(5);
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}
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//a STOP signal (SDA from low to high while CLK is high)
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SDA_L;
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WaitUS(5);
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SCL_H;
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WaitUS(2);
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SDA_H;
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WaitUS(2);
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bool isok = (SCL_read && SDA_read);
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if (!SDA_read)
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DbpString("I2C bus recovery error: SDA still LOW");
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if (!SCL_read)
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DbpString("I2C bus recovery error: SCL still LOW");
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if (isok)
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DbpString("I2C bus recovery complete");
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}
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void I2C_init(void) {
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// Configure reset pin, close up pull up, push-pull output, default high
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AT91C_BASE_PIOA->PIO_PPUDR = GPIO_RST;
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AT91C_BASE_PIOA->PIO_MDDR = GPIO_RST;
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// Configure I2C pin, open up, open leakage
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AT91C_BASE_PIOA->PIO_PPUER |= (GPIO_SCL | GPIO_SDA);
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AT91C_BASE_PIOA->PIO_MDER |= (GPIO_SCL | GPIO_SDA);
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// default three lines all pull up
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AT91C_BASE_PIOA->PIO_SODR |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
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AT91C_BASE_PIOA->PIO_OER |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
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AT91C_BASE_PIOA->PIO_PER |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
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bool isok = (SCL_read && SDA_read);
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if (!isok)
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I2C_recovery();
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}
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// set the reset state
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void I2C_SetResetStatus(uint8_t LineRST, uint8_t LineSCK, uint8_t LineSDA) {
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if (LineRST)
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HIGH(GPIO_RST);
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else
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LOW(GPIO_RST);
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if (LineSCK)
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HIGH(GPIO_SCL);
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else
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LOW(GPIO_SCL);
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if (LineSDA)
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HIGH(GPIO_SDA);
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else
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LOW(GPIO_SDA);
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}
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// Reset the SIM_Adapter, then enter the main program
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// Note: the SIM_Adapter will not enter the main program after power up. Please run this function before use SIM_Adapter.
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void I2C_Reset_EnterMainProgram(void) {
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StartTicks();
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I2C_init();
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I2C_SetResetStatus(0, 0, 0);
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WaitMS(30);
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I2C_SetResetStatus(1, 0, 0);
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WaitMS(30);
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I2C_SetResetStatus(1, 1, 1);
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WaitMS(10);
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}
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// Reset the SIM_Adapter, then enter the bootloader program
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// Reserve for firmware update.
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void I2C_Reset_EnterBootloader(void) {
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StartTicks();
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I2C_init();
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I2C_SetResetStatus(0, 1, 1);
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WaitMS(100);
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I2C_SetResetStatus(1, 1, 1);
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WaitMS(10);
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}
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// Wait for the clock to go High.
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bool WaitSCL_H_delay(uint32_t delay) {
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while (delay--) {
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if (SCL_read) {
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return true;
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}
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I2C_DELAY_1CLK;
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}
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return false;
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}
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// 5000 * 3.07us = 15350us. 15.35ms
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// 15000 * 3.07us = 46050us. 46.05ms
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bool WaitSCL_H(void) {
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return WaitSCL_H_delay(15000);
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}
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bool WaitSCL_L_delay(uint32_t delay) {
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while (delay--) {
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if (!SCL_read) {
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return true;
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}
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I2C_DELAY_1CLK;
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}
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return false;
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}
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// 5000 * 3.07us = 15350us. 15.35ms
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bool WaitSCL_L(void) {
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return WaitSCL_L_delay(15000);
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}
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// Wait max 1800ms or until SCL goes LOW.
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// It timeout reading response from card
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// Which ever comes first
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bool WaitSCL_L_timeout(void) {
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volatile uint16_t delay = 1800;
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while (delay--) {
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// exit on SCL LOW
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if (!SCL_read)
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return true;
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WaitMS(1);
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}
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return (delay == 0);
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}
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bool I2C_Start(void) {
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I2C_DELAY_XCLK(4);
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SDA_H;
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I2C_DELAY_1CLK;
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SCL_H;
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if (!WaitSCL_H()) return false;
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I2C_DELAY_2CLK;
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if (!SCL_read) return false;
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if (!SDA_read) return false;
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SDA_L;
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I2C_DELAY_2CLK;
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return true;
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}
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bool I2C_WaitForSim() {
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// wait for data from card
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if (!WaitSCL_L_timeout())
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return false;
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// 8051 speaks with smart card.
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// 1000*50*3.07 = 153.5ms
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// 1byte transfer == 1ms with max frame being 256bytes
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if (!WaitSCL_H_delay(10 * 1000 * 50))
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return false;
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return true;
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}
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// send i2c STOP
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void I2C_Stop(void) {
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SCL_L;
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I2C_DELAY_2CLK;
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SDA_L;
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I2C_DELAY_2CLK;
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SCL_H;
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I2C_DELAY_2CLK;
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if (!WaitSCL_H()) return;
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SDA_H;
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I2C_DELAY_XCLK(8);
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}
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// Send i2c ACK
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void I2C_Ack(void) {
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SCL_L;
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I2C_DELAY_2CLK;
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SDA_L;
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I2C_DELAY_2CLK;
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SCL_H;
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I2C_DELAY_2CLK;
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if (!WaitSCL_H()) return;
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SCL_L;
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I2C_DELAY_2CLK;
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}
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// Send i2c NACK
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void I2C_NoAck(void) {
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SCL_L;
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I2C_DELAY_2CLK;
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SDA_H;
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I2C_DELAY_2CLK;
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SCL_H;
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I2C_DELAY_2CLK;
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if (!WaitSCL_H()) return;
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SCL_L;
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I2C_DELAY_2CLK;
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}
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bool I2C_WaitAck(void) {
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SCL_L;
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I2C_DELAY_1CLK;
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SDA_H;
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I2C_DELAY_1CLK;
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SCL_H;
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if (!WaitSCL_H())
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return false;
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I2C_DELAY_2CLK;
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I2C_DELAY_2CLK;
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if (SDA_read) {
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SCL_L;
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return false;
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}
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SCL_L;
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return true;
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}
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void I2C_SendByte(uint8_t data) {
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uint8_t bits = 8;
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while (bits--) {
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SCL_L;
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I2C_DELAY_1CLK;
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if (data & 0x80)
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SDA_H;
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else
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SDA_L;
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data <<= 1;
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I2C_DELAY_1CLK;
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SCL_H;
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if (!WaitSCL_H())
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return;
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I2C_DELAY_2CLK;
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}
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SCL_L;
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}
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int16_t I2C_ReadByte(void) {
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uint8_t bits = 8, b = 0;
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SDA_H;
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while (bits--) {
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b <<= 1;
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SCL_L;
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if (!WaitSCL_L()) return -2;
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I2C_DELAY_1CLK;
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SCL_H;
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if (!WaitSCL_H()) return -1;
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I2C_DELAY_1CLK;
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if (SDA_read)
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b |= 0x01;
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}
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SCL_L;
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return b;
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}
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// Sends one byte ( command to be written, SlaveDevice address)
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bool I2C_WriteCmd(uint8_t device_cmd, uint8_t device_address) {
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bool bBreak = true;
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do {
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if (!I2C_Start())
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return false;
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(device_cmd);
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if (!I2C_WaitAck())
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break;
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bBreak = false;
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} while (false);
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I2C_Stop();
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if (bBreak) {
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if (MF_DBGLEVEL > 3) DbpString(I2C_ERROR);
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return false;
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}
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return true;
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}
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// Sends 1 byte data (Data to be written, command to be written , SlaveDevice address ).
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bool I2C_WriteByte(uint8_t data, uint8_t device_cmd, uint8_t device_address) {
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bool bBreak = true;
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do {
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if (!I2C_Start())
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return false;
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(device_cmd);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(data);
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if (!I2C_WaitAck())
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break;
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bBreak = false;
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} while (false);
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I2C_Stop();
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if (bBreak) {
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if (MF_DBGLEVEL > 3) DbpString(I2C_ERROR);
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return false;
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}
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return true;
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}
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//Sends array of data (Array, length, command to be written , SlaveDevice address ).
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// len = uint8 (max buffer to write 256bytes)
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bool I2C_BufferWrite(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t device_address) {
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bool bBreak = true;
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do {
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if (!I2C_Start())
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return false;
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(device_cmd);
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if (!I2C_WaitAck())
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break;
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while (len) {
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I2C_SendByte(*data);
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if (!I2C_WaitAck())
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break;
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len--;
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data++;
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}
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if (len == 0)
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bBreak = false;
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} while (false);
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I2C_Stop();
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if (bBreak) {
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if (MF_DBGLEVEL > 3) DbpString(I2C_ERROR);
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return false;
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}
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return true;
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}
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// read one array of data (Data array, Readout length, command to be written , SlaveDevice address ).
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// len = uint8 (max buffer to read 256bytes)
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int16_t I2C_BufferRead(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t device_address) {
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if (!data || len == 0)
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return 0;
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// extra wait 500us (514us measured)
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// 200us (xx measured)
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WaitUS(600);
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bool bBreak = true;
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uint16_t readcount = 0;
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do {
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if (!I2C_Start())
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return 0;
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// 0xB0 / 0xC0 == i2c write
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(device_cmd);
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if (!I2C_WaitAck())
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break;
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// 0xB1 / 0xC1 == i2c read
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I2C_Start();
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I2C_SendByte(device_address | 1);
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if (!I2C_WaitAck())
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break;
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bBreak = false;
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} while (false);
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if (bBreak) {
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I2C_Stop();
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if (MF_DBGLEVEL > 3) DbpString(I2C_ERROR);
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return 0;
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}
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while (len) {
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int16_t tmp = I2C_ReadByte();
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if (tmp < 0)
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return tmp;
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*data = (uint8_t)tmp & 0xFF;
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len--;
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// 读取的第一个字节为后续长度
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// The first byte in response is the message length
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if (!readcount && (len > *data)) {
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len = *data;
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} else {
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data++;
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}
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readcount++;
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// acknowledgements. After last byte send NACK.
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if (len == 0)
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I2C_NoAck();
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else
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I2C_Ack();
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}
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I2C_Stop();
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// return bytecount - first byte (which is length byte)
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return --readcount;
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}
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int16_t I2C_ReadFW(uint8_t *data, uint8_t len, uint8_t msb, uint8_t lsb, uint8_t device_address) {
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//START, 0xB0, 0x00, 0x00, START, 0xB1, xx, yy, zz, ......, STOP
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bool bBreak = true;
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uint8_t readcount = 0;
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// sending
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do {
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if (!I2C_Start())
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return 0;
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// 0xB0 / 0xC0 i2c write
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I2C_SendByte(device_address & 0xFE);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(msb);
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if (!I2C_WaitAck())
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break;
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I2C_SendByte(lsb);
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if (!I2C_WaitAck())
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break;
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// 0xB1 / 0xC1 i2c read
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I2C_Start();
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I2C_SendByte(device_address | 1);
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if (!I2C_WaitAck())
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break;
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bBreak = false;
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} while (false);
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if (bBreak) {
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I2C_Stop();
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if (MF_DBGLEVEL > 3) DbpString(I2C_ERROR);
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return 0;
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}
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// reading
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while (len) {
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int16_t tmp = I2C_ReadByte();
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if (tmp < 0)
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return tmp;
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*data = (uint8_t)tmp & 0xFF;
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data++;
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readcount++;
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len--;
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// acknowledgements. After last byte send NACK.
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if (len == 0)
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I2C_NoAck();
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else
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I2C_Ack();
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}
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I2C_Stop();
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return readcount;
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}
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bool I2C_WriteFW(uint8_t *data, uint8_t len, uint8_t msb, uint8_t lsb, uint8_t device_address) {
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//START, 0xB0, 0x00, 0x00, xx, yy, zz, ......, STOP
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bool bBreak = true;
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do {
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if (!I2C_Start())
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return false;
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|
||
// 0xB0 == i2c write
|
||
I2C_SendByte(device_address & 0xFE);
|
||
if (!I2C_WaitAck())
|
||
break;
|
||
|
||
I2C_SendByte(msb);
|
||
if (!I2C_WaitAck())
|
||
break;
|
||
|
||
I2C_SendByte(lsb);
|
||
if (!I2C_WaitAck())
|
||
break;
|
||
|
||
while (len) {
|
||
I2C_SendByte(*data);
|
||
if (!I2C_WaitAck())
|
||
break;
|
||
|
||
len--;
|
||
data++;
|
||
}
|
||
|
||
if (len == 0)
|
||
bBreak = false;
|
||
} while (false);
|
||
|
||
I2C_Stop();
|
||
if (bBreak) {
|
||
if (MF_DBGLEVEL > 3) DbpString(I2C_ERROR);
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
void I2C_print_status(void) {
|
||
DbpString("Smart card module (ISO 7816)");
|
||
uint8_t resp[] = {0, 0, 0, 0};
|
||
I2C_Reset_EnterMainProgram();
|
||
uint8_t len = I2C_BufferRead(resp, sizeof(resp), I2C_DEVICE_CMD_GETVERSION, I2C_DEVICE_ADDRESS_MAIN);
|
||
if (len > 0)
|
||
Dbprintf(" version.................v%x.%02d", resp[0], resp[1]);
|
||
else
|
||
DbpString(" version.................FAILED");
|
||
}
|
||
|
||
// Will read response from smart card module, retries 3 times to get the data.
|
||
bool sc_rx_bytes(uint8_t *dest, uint8_t *destlen) {
|
||
|
||
uint8_t i = 3;
|
||
int16_t len = 0;
|
||
while (i--) {
|
||
|
||
I2C_WaitForSim();
|
||
|
||
len = I2C_BufferRead(dest, *destlen, I2C_DEVICE_CMD_READ, I2C_DEVICE_ADDRESS_MAIN);
|
||
|
||
if (len > 1) {
|
||
break;
|
||
} else if (len == 1) {
|
||
continue;
|
||
} else if (len <= 0) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
// after three
|
||
if (len <= 1)
|
||
return false;
|
||
|
||
*destlen = (uint8_t)len & 0xFF;
|
||
return true;
|
||
}
|
||
|
||
bool GetATR(smart_card_atr_t *card_ptr) {
|
||
|
||
if (!card_ptr)
|
||
return false;
|
||
|
||
card_ptr->atr_len = 0;
|
||
memset(card_ptr->atr, 0, sizeof(card_ptr->atr));
|
||
|
||
|
||
// Send ATR
|
||
// start [C0 01] stop start C1 len aa bb cc stop]
|
||
I2C_WriteCmd(I2C_DEVICE_CMD_GENERATE_ATR, I2C_DEVICE_ADDRESS_MAIN);
|
||
|
||
//wait for sim card to answer.
|
||
// 1byte = 1ms , max frame 256bytes. SHould wait 256ms atleast just in case.
|
||
if (!I2C_WaitForSim())
|
||
return false;
|
||
|
||
// read bytes from module
|
||
uint8_t len = sizeof(card_ptr->atr);
|
||
if (!sc_rx_bytes(card_ptr->atr, &len))
|
||
return false;
|
||
|
||
uint8_t pos_td = 1;
|
||
if ((card_ptr->atr[1] & 0x10) == 0x10) pos_td++;
|
||
if ((card_ptr->atr[1] & 0x20) == 0x20) pos_td++;
|
||
if ((card_ptr->atr[1] & 0x40) == 0x40) pos_td++;
|
||
|
||
// T0 indicate presence T=0 vs T=1. T=1 has checksum TCK
|
||
if ((card_ptr->atr[1] & 0x80) == 0x80) {
|
||
|
||
pos_td++;
|
||
|
||
// 1 == T1 , presence of checksum TCK
|
||
if ((card_ptr->atr[pos_td] & 0x01) == 0x01) {
|
||
|
||
uint8_t chksum = 0;
|
||
// xor property. will be zero when xored with chksum.
|
||
for (uint8_t i = 1; i < len; ++i)
|
||
chksum ^= card_ptr->atr[i];
|
||
|
||
if (chksum) {
|
||
if (MF_DBGLEVEL > 2) DbpString("Wrong ATR checksum");
|
||
}
|
||
}
|
||
}
|
||
|
||
card_ptr->atr_len = len;
|
||
LogTrace(card_ptr->atr, card_ptr->atr_len, 0, 0, NULL, false);
|
||
return true;
|
||
}
|
||
|
||
void SmartCardAtr(void) {
|
||
smart_card_atr_t card;
|
||
LED_D_ON();
|
||
clear_trace();
|
||
set_tracing(true);
|
||
I2C_Reset_EnterMainProgram();
|
||
bool isOK = GetATR(&card);
|
||
cmd_send(CMD_ACK, isOK, sizeof(smart_card_atr_t), 0, &card, sizeof(smart_card_atr_t));
|
||
set_tracing(false);
|
||
LEDsoff();
|
||
}
|
||
|
||
void SmartCardRaw(uint64_t arg0, uint64_t arg1, uint8_t *data) {
|
||
|
||
LED_D_ON();
|
||
|
||
uint8_t len = 0;
|
||
uint8_t *resp = BigBuf_malloc(ISO7618_MAX_FRAME);
|
||
smartcard_command_t flags = arg0;
|
||
|
||
if ((flags & SC_CONNECT))
|
||
clear_trace();
|
||
|
||
set_tracing(true);
|
||
|
||
if ((flags & SC_CONNECT)) {
|
||
|
||
I2C_Reset_EnterMainProgram();
|
||
|
||
if ((flags & SC_SELECT)) {
|
||
smart_card_atr_t card;
|
||
bool gotATR = GetATR(&card);
|
||
//cmd_send(CMD_ACK, gotATR, sizeof(smart_card_atr_t), 0, &card, sizeof(smart_card_atr_t));
|
||
if (!gotATR)
|
||
goto OUT;
|
||
}
|
||
}
|
||
|
||
if ((flags & SC_RAW) || (flags & SC_RAW_T0)) {
|
||
|
||
LogTrace(data, arg1, 0, 0, NULL, true);
|
||
|
||
// Send raw bytes
|
||
// asBytes = A0 A4 00 00 02
|
||
// arg1 = len 5
|
||
bool res = I2C_BufferWrite(data, arg1, ((flags & SC_RAW_T0) ? I2C_DEVICE_CMD_SEND_T0 : I2C_DEVICE_CMD_SEND), I2C_DEVICE_ADDRESS_MAIN);
|
||
if (!res && MF_DBGLEVEL > 3) DbpString(I2C_ERROR);
|
||
|
||
// read bytes from module
|
||
len = ISO7618_MAX_FRAME;
|
||
res = sc_rx_bytes(resp, &len);
|
||
if (res) {
|
||
LogTrace(resp, len, 0, 0, NULL, false);
|
||
} else {
|
||
len = 0;
|
||
}
|
||
}
|
||
OUT:
|
||
cmd_send(CMD_ACK, len, 0, 0, resp, len);
|
||
BigBuf_free();
|
||
set_tracing(false);
|
||
LEDsoff();
|
||
}
|
||
|
||
void SmartCardUpgrade(uint64_t arg0) {
|
||
|
||
LED_C_ON();
|
||
|
||
#define I2C_BLOCK_SIZE 128
|
||
// write. Sector0, with 11,22,33,44
|
||
// erase is 128bytes, and takes 50ms to execute
|
||
|
||
I2C_Reset_EnterBootloader();
|
||
|
||
bool isOK = true;
|
||
uint16_t length = arg0, pos = 0;
|
||
uint8_t *fwdata = BigBuf_get_addr();
|
||
uint8_t *verfiydata = BigBuf_malloc(I2C_BLOCK_SIZE);
|
||
|
||
while (length) {
|
||
|
||
uint8_t msb = (pos >> 8) & 0xFF;
|
||
uint8_t lsb = pos & 0xFF;
|
||
|
||
Dbprintf("FW %02X%02X", msb, lsb);
|
||
|
||
size_t size = MIN(I2C_BLOCK_SIZE, length);
|
||
|
||
// write
|
||
int16_t res = I2C_WriteFW(fwdata + pos, size, msb, lsb, I2C_DEVICE_ADDRESS_BOOT);
|
||
if (!res) {
|
||
DbpString("Writing failed");
|
||
isOK = false;
|
||
break;
|
||
}
|
||
|
||
// writing takes time.
|
||
WaitMS(50);
|
||
|
||
// read
|
||
res = I2C_ReadFW(verfiydata, size, msb, lsb, I2C_DEVICE_ADDRESS_BOOT);
|
||
if (res <= 0) {
|
||
DbpString("Reading back failed");
|
||
isOK = false;
|
||
break;
|
||
}
|
||
|
||
// cmp
|
||
if (0 != memcmp(fwdata + pos, verfiydata, size)) {
|
||
DbpString("not equal data");
|
||
isOK = false;
|
||
break;
|
||
}
|
||
|
||
length -= size;
|
||
pos += size;
|
||
}
|
||
cmd_send(CMD_ACK, isOK, pos, 0, 0, 0);
|
||
LED_C_OFF();
|
||
BigBuf_free();
|
||
}
|
||
|
||
void SmartCardSetBaud(uint64_t arg0) {
|
||
}
|
||
|
||
void SmartCardSetClock(uint64_t arg0) {
|
||
LED_D_ON();
|
||
set_tracing(true);
|
||
I2C_Reset_EnterMainProgram();
|
||
|
||
// Send SIM CLC
|
||
// start [C0 05 xx] stop
|
||
I2C_WriteByte(arg0, I2C_DEVICE_CMD_SIM_CLC, I2C_DEVICE_ADDRESS_MAIN);
|
||
|
||
cmd_send(CMD_ACK, 1, 0, 0, 0, 0);
|
||
set_tracing(false);
|
||
LEDsoff();
|
||
}
|