CCID.c 7.65 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
/*
             LUFA Library
     Copyright (C) Dean Camera, 2018.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2018  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  Copyright 2018  Filipe Rodrigues (filipepazrodrigues [at] gmail [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaims all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
 *  Main source file for the CCID demo. This file contains the main tasks of
 *  the demo and is responsible for the initial application hardware configuration.
 *
 *  \warning
 *  LUFA is not a secure USB stack, and has not undergone, not is it expected to pass, any
 *  form of security audit. The CCID class here is presented as-is and is intended for
 *  research purposes only, and *should not* be used in a security critical application
 *  under any circumstances.
 *
 *  \warning
 *  This code is not production ready and should not by any means be considered safe.
 *  If you plan to integrate it into your application, you should seriously consider strong
 *  encryption algorithms or a secure microprocessor. Since Atmel AVR microprocessors do not
 *  have any security requirement (therefore they don't offer any known protection against
 *  side channel attacks or fault injection) a secure microprocessor is the best option.
 */

#include "CCID.h"

/** LUFA CCID Class driver interface configuration and state information. This structure is
 *  passed to all CCID Class driver functions, so that multiple instances of the same class
 *  within a device can be differentiated from one another.
 */
USB_ClassInfo_CCID_Device_t CCID_Interface =
	{
		.Config =
			{
				.InterfaceNumber              = INTERFACE_ID_CCID,
				.TotalSlots                   = 1,
				.DataINEndpoint               =
					{
						.Address              = CCID_IN_EPADDR,
						.Size                 = CCID_EPSIZE,
						.Banks                = 1,
					},
				.DataOUTEndpoint              =
					{
						.Address              = CCID_OUT_EPADDR,
						.Size                 = CCID_EPSIZE,
						.Banks                = 1,
					},
			},
	};


/** Main program entry point. This routine contains the overall program flow, including initial
 *  setup of all components and the main program loop.
 */
int main(void)
{
	SetupHardware();

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
	GlobalInterruptEnable();

	for (;;)
	{
		USB_USBTask();
		CCID_Device_USBTask(&CCID_Interface);
	}
}

/** Configures the board hardware and chip peripherals for the demo's functionality. */
void SetupHardware(void)
{
#if (ARCH == ARCH_AVR8)
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

	/* Disable clock division */
	clock_prescale_set(clock_div_1);
#elif (ARCH == ARCH_XMEGA)
	/* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
	XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
	XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);

	/* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
	XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
	XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);

	PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
#endif

	/* Hardware Initialization */
	LEDs_Init();
	USB_Init();
}

/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */
void EVENT_USB_Device_Connect(void)
{
	/* Indicate USB enumerating */
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
}

/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
 *  the status LEDs.
 */
void EVENT_USB_Device_Disconnect(void)
{
	/* Indicate USB not ready */
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
}

/** Event handler for the library USB Configuration Changed event. */
void EVENT_USB_Device_ConfigurationChanged(void)
{
	bool ConfigSuccess = true;

	ConfigSuccess &= CCID_Device_ConfigureEndpoints(&CCID_Interface);

	/* Indicate endpoint configuration success or failure */
	LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
}

/** Event handler for the library USB Control Request reception event. */
void EVENT_USB_Device_ControlRequest(void)
{
	CCID_Device_ProcessControlRequest(&CCID_Interface);
}

/** Event handler for the CCID_PC_to_RDR_IccPowerOn message. This message is sent to the device
 *  whenever an application at the host wants to send a power off signal to a slot.
 *  THe slot must reply back with a recognizable ATR (answer to reset)
 */
uint8_t CALLBACK_CCID_IccPowerOn(uint8_t slot,
Filipe Rodrigues's avatar
Filipe Rodrigues committed
161
								 uint8_t* atr,
162
163
164
165
166
								 uint8_t* attrSize,
								 uint8_t* error)
{
	if (slot < CCID_Interface.Config.TotalSlots)
	{
Filipe Rodrigues's avatar
Filipe Rodrigues committed
167
		Iso7816_CreateSimpleAtr(atr, attrSize);
168
169
170
171
172
		*error = CCID_ERROR_NO_ERROR;
		return CCID_COMMANDSTATUS_PROCESSEDWITHOUTERROR | CCID_ICCSTATUS_PRESENTANDACTIVE;
	}

	*error = CCID_ERROR_SLOT_NOT_FOUND;
Filipe Rodrigues's avatar
Filipe Rodrigues committed
173
	return CCID_COMMANDSTATUS_FAILED | CCID_ICCSTATUS_NOICCPRESENT;
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
}

/** Event handler for the CCID_PC_to_RDR_IccPowerOff message. This message is sent to the device
 *  whenever an application at the host wants to send a power off signal to a slot.
 */
uint8_t CALLBACK_CCID_IccPowerOff(uint8_t slot, uint8_t* error)
{
	if (slot < CCID_Interface.Config.TotalSlots)
	{
		*error = CCID_ERROR_NO_ERROR;
		return CCID_COMMANDSTATUS_PROCESSEDWITHOUTERROR | CCID_ICCSTATUS_NOICCPRESENT;
	}
	else
	{
		*error = CCID_ERROR_SLOT_NOT_FOUND;
Filipe Rodrigues's avatar
Filipe Rodrigues committed
189
		return CCID_COMMANDSTATUS_FAILED | CCID_ICCSTATUS_NOICCPRESENT;
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
	}
}

/** Event handler for the CCID_PC_to_RDR_GetSlotStatus. THis message is sent to the device
 *  whenever an application at the host wants to the get the current slot status
 *
 */
uint8_t CALLBACK_CCID_GetSlotStatus(uint8_t slot, uint8_t* error)
{
	if (slot < CCID_Interface.Config.TotalSlots)
	{
		*error = CCID_ERROR_NO_ERROR;
		return CCID_COMMANDSTATUS_PROCESSEDWITHOUTERROR | CCID_ICCSTATUS_PRESENTANDACTIVE;
	}
	else
	{
		 *error = CCID_ERROR_SLOT_NOT_FOUND;
Filipe Rodrigues's avatar
Filipe Rodrigues committed
207
		return CCID_COMMANDSTATUS_FAILED | CCID_ICCSTATUS_NOICCPRESENT;
208
209
210
211
	}
}

uint8_t CALLBACK_CCID_Abort(uint8_t slot,
Filipe Rodrigues's avatar
Filipe Rodrigues committed
212
213
							uint8_t seq,
							uint8_t* error)
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
{
	if (CCID_Interface.State.Aborted && slot == 0 && CCID_Interface.State.AbortedSeq == seq)
	{
		CCID_Interface.State.Aborted    = false;
		CCID_Interface.State.AbortedSeq = -1;
		*error = CCID_ERROR_NO_ERROR;
		return CCID_COMMANDSTATUS_PROCESSEDWITHOUTERROR | CCID_ICCSTATUS_PRESENTANDACTIVE;
	}
	else if (!CCID_Interface.State.Aborted)
	{
		*error = CCID_ERROR_CMD_NOT_ABORTED;
		return CCID_COMMANDSTATUS_PROCESSEDWITHOUTERROR | CCID_ICCSTATUS_PRESENTANDACTIVE;
	}
	else if (slot != 0)
	{
		*error = CCID_ERROR_SLOT_NOT_FOUND;
		return CCID_COMMANDSTATUS_FAILED | CCID_ICCSTATUS_NOICCPRESENT;
	}
	else
	{
		*error = CCID_ERROR_NOT_SUPPORTED;
		return CCID_COMMANDSTATUS_FAILED | CCID_ICCSTATUS_NOICCPRESENT;
	}
}