Kévin Redon | 9a12d68 | 2018-07-08 13:21:16 +0200 | [diff] [blame] | 1 | /* SIMtrace 2 sniffer mode |
| 2 | * |
| 3 | * (C) 2016-2017 by Harald Welte <hwelte@hmw-consulting.de> |
| 4 | * (C) 2018 by sysmocom -s.f.m.c. GmbH, Author: Kevin Redon <kredon@sysmocom.de> |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 5 | * |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 6 | * This program is free software; you can redistribute it and/or modify |
Kévin Redon | 9a12d68 | 2018-07-08 13:21:16 +0200 | [diff] [blame] | 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 9 | * (at your option) any later version. |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 10 | * |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Kévin Redon | 9a12d68 | 2018-07-08 13:21:16 +0200 | [diff] [blame] | 14 | * GNU General Public License for more details. |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 15 | * |
Kévin Redon | 9a12d68 | 2018-07-08 13:21:16 +0200 | [diff] [blame] | 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 19 | */ |
Kévin Redon | 9a12d68 | 2018-07-08 13:21:16 +0200 | [diff] [blame] | 20 | /* This code implement the Sniffer mode to sniff the communication between a |
| 21 | * SIM card (or any ISO 7816 smart card) and a phone (or any ISO 7816 card |
| 22 | * reader). |
| 23 | * For historical reasons (i.e. SIMtrace hardware) the USART peripheral |
| 24 | * connected to the SIM card is used. |
| 25 | * TODO put common ISO7816-3 code is separate library (and combine clean with |
| 26 | * iso7816_4) |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 27 | */ |
Kévin Redon | 36abece | 2018-06-04 16:30:01 +0200 | [diff] [blame] | 28 | #include "board.h" |
| 29 | #include "simtrace.h" |
| 30 | |
Harald Welte | 2fb5996 | 2016-02-28 12:34:26 +0100 | [diff] [blame] | 31 | #ifdef HAVE_SNIFFER |
| 32 | |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 33 | /*------------------------------------------------------------------------------ |
| 34 | * Headers |
| 35 | *------------------------------------------------------------------------------*/ |
| 36 | |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 37 | #include <string.h> |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 38 | #include "utils.h" |
| 39 | #include "iso7816_fidi.h" |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 40 | /* USB related libraries */ |
| 41 | #include "osmocom/core/linuxlist.h" |
| 42 | #include "osmocom/core/msgb.h" |
| 43 | #include "llist_irqsafe.h" |
| 44 | #include "usb_buf.h" |
| 45 | #include "simtrace_usb.h" |
| 46 | #include "simtrace_prot.h" |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 47 | |
| 48 | /*------------------------------------------------------------------------------ |
| 49 | * Internal definitions |
| 50 | *------------------------------------------------------------------------------*/ |
| 51 | |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 52 | /*! Maximum Answer-To-Reset (ATR) size in bytes |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 53 | * @note defined in ISO/IEC 7816-3:2006(E) section 8.2.1 as 32, on top the initial character TS of section 8.1 |
| 54 | * @remark technical there is no size limitation since Yi present in T0,TDi will indicate if more interface bytes are present, including TDi+i |
| 55 | */ |
| 56 | #define MAX_ATR_SIZE 33 |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 57 | /*! Maximum Protocol and Parameters Selection (PPS) size in bytes |
| 58 | * @note defined in ISO/IEC 7816-3:2006(E) section 9.2 |
| 59 | */ |
| 60 | #define MAX_PPS_SIZE 6 |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 61 | |
| 62 | /*! ISO 7816-3 states relevant to the sniff mode */ |
| 63 | enum iso7816_3_sniff_state { |
| 64 | ISO7816_S_RESET, /*!< in Reset */ |
| 65 | ISO7816_S_WAIT_ATR, /*!< waiting for ATR to start */ |
| 66 | ISO7816_S_IN_ATR, /*!< while we are receiving the ATR */ |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 67 | ISO7816_S_WAIT_TPDU, /*!< waiting for start of new TPDU */ |
| 68 | ISO7816_S_IN_TPDU, /*!< inside a single TPDU */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 69 | ISO7816_S_IN_PPS_REQ, /*!< while we are inside the PPS request */ |
| 70 | ISO7816_S_WAIT_PPS_RSP, /*!< waiting for start of the PPS response */ |
| 71 | ISO7816_S_IN_PPS_RSP, /*!< while we are inside the PPS request */ |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 72 | }; |
| 73 | |
| 74 | /*! Answer-To-Reset (ATR) sub-states of ISO7816_S_IN_ATR |
| 75 | * @note defined in ISO/IEC 7816-3:2006(E) section 8 |
| 76 | */ |
| 77 | enum atr_sniff_state { |
| 78 | ATR_S_WAIT_TS, /*!< initial byte */ |
| 79 | ATR_S_WAIT_T0, /*!< format byte */ |
| 80 | ATR_S_WAIT_TA, /*!< first sub-group interface byte */ |
| 81 | ATR_S_WAIT_TB, /*!< second sub-group interface byte */ |
| 82 | ATR_S_WAIT_TC, /*!< third sub-group interface byte */ |
| 83 | ATR_S_WAIT_TD, /*!< fourth sub-group interface byte */ |
| 84 | ATR_S_WAIT_HIST, /*!< historical byte */ |
| 85 | ATR_S_WAIT_TCK, /*!< check byte */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | /*! Protocol and Parameters Selection (PPS) sub-states of ISO7816_S_IN_PTS_REQ/ISO7816_S_IN_PTS_RSP |
| 89 | * @note defined in ISO/IEC 7816-3:2006(E) section 9 |
| 90 | */ |
| 91 | enum pps_sniff_state { |
| 92 | PPS_S_WAIT_PPSS, /*!< initial byte */ |
| 93 | PPS_S_WAIT_PPS0, /*!< format byte */ |
| 94 | PPS_S_WAIT_PPS1, /*!< first parameter byte */ |
| 95 | PPS_S_WAIT_PPS2, /*!< second parameter byte */ |
| 96 | PPS_S_WAIT_PPS3, /*!< third parameter byte */ |
| 97 | PPS_S_WAIT_PCK, /*!< check byte */ |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 98 | PPS_S_WAIT_END, /*!< all done */ |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 99 | }; |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 100 | |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 101 | /*! Transport Protocol Data Unit (TPDU) sub-states of ISO7816_S_IN_TPDU |
| 102 | * @note defined in ISO/IEC 7816-3:2006(E) section 10 and 12 |
| 103 | * @remark APDUs are formed by one or more command+response TPDUs |
| 104 | */ |
| 105 | enum tpdu_sniff_state { |
| 106 | TPDU_S_CLA, /*!< class byte */ |
| 107 | TPDU_S_INS, /*!< instruction byte */ |
| 108 | TPDU_S_P1, /*!< first parameter byte for the instruction */ |
| 109 | TPDU_S_P2, /*!< second parameter byte for the instruction */ |
| 110 | TPDU_S_P3, /*!< third parameter byte encoding the data length */ |
| 111 | TPDU_S_PROCEDURE, /*!< procedure byte (could also be SW1) */ |
| 112 | TPDU_S_DATA_REMAINING, /*!< remaining data bytes */ |
| 113 | TPDU_S_DATA_SINGLE, /*!< single data byte */ |
| 114 | TPDU_S_SW1, /*!< first status word */ |
| 115 | TPDU_S_SW2, /*!< second status word */ |
| 116 | }; |
| 117 | |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 118 | /*------------------------------------------------------------------------------ |
| 119 | * Internal variables |
| 120 | *------------------------------------------------------------------------------*/ |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 121 | |
| 122 | /* note: the sniffer code is currently designed to support only one sniffing interface, but the hardware would support a second one. |
| 123 | * to support a second sniffer interface the code should be restructured to use handles. |
| 124 | */ |
| 125 | /* Pin configurations */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 126 | /*! Pin configuration to sniff communication (using USART connection card) */ |
Kévin Redon | ee62a9d | 2018-06-11 13:42:23 +0200 | [diff] [blame] | 127 | static const Pin pins_sniff[] = { PINS_SIM_SNIFF }; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 128 | /*! Pin configuration to interconnect phone and card using the bus switch */ |
Harald Welte | 7dd3dfd | 2016-03-03 12:32:04 +0100 | [diff] [blame] | 129 | static const Pin pins_bus[] = { PINS_BUS_SNIFF }; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 130 | /*! Pin configuration to power the card by the phone */ |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 131 | static const Pin pins_power[] = { PINS_PWR_SNIFF }; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 132 | /*! Pin configuration for timer counter to measure ETU timing */ |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 133 | static const Pin pins_tc[] = { PINS_TC }; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 134 | /*! Pin configuration for card reset line */ |
| 135 | static const Pin pin_rst = PIN_SIM_RST_SNIFF; |
| 136 | |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 137 | /* USART related variables */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 138 | /*! USART peripheral used to sniff communication */ |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 139 | static struct Usart_info sniff_usart = { |
| 140 | .base = USART_SIM, |
| 141 | .id = ID_USART_SIM, |
Harald Welte | 7dd3dfd | 2016-03-03 12:32:04 +0100 | [diff] [blame] | 142 | .state = USART_RCV, |
| 143 | }; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 144 | /*! Ring buffer to store sniffer communication data */ |
Kévin Redon | 7b73462 | 2018-06-06 16:13:48 +0200 | [diff] [blame] | 145 | static struct ringbuf sniff_buffer; |
| 146 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 147 | /* Flags to know is the card status changed (see SIMTRACE_MSGT_DT_SNIFF_CHANGE flags) */ |
| 148 | volatile uint32_t change_flags = 0; |
| 149 | |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 150 | /* ISO 7816 variables */ |
| 151 | /*! ISO 7816-3 state */ |
| 152 | enum iso7816_3_sniff_state iso_state = ISO7816_S_RESET; |
| 153 | /*! ATR state */ |
| 154 | enum atr_sniff_state atr_state; |
| 155 | /*! ATR data |
| 156 | * @remark can be used to check later protocol changes |
| 157 | */ |
| 158 | uint8_t atr[MAX_ATR_SIZE]; |
| 159 | /*! Current index in the ATR data */ |
| 160 | uint8_t atr_i = 0; |
| 161 | /*! If convention conversion is needed */ |
| 162 | bool convention_convert = false; |
| 163 | /*! The supported T protocols */ |
| 164 | uint16_t t_protocol_support = 0; |
| 165 | /*! PPS state |
| 166 | * @remark it is shared between request and response since they aren't simultaneous but follow the same procedure |
| 167 | */ |
| 168 | enum pps_sniff_state pps_state; |
| 169 | /*! PPS request data |
| 170 | * @remark can be used to check PPS response |
| 171 | */ |
| 172 | uint8_t pps_req[MAX_PPS_SIZE]; |
| 173 | /*! PPS response data */ |
| 174 | uint8_t pps_rsp[MAX_PPS_SIZE]; |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 175 | /*! TPDU state */ |
| 176 | enum tpdu_sniff_state tpdu_state; |
| 177 | /*! Final TPDU packet |
| 178 | * @note this is the complete command+response TPDU, including header, data, and status words |
| 179 | * @remark this does not include the procedure bytes |
| 180 | */ |
| 181 | uint8_t tpdu_packet[5+256+2]; |
| 182 | /*! Current index in TPDU packet */ |
Kévin Redon | c9bd715 | 2018-07-03 16:17:00 +0200 | [diff] [blame] | 183 | uint16_t tpdu_packet_i = 0; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 184 | |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 185 | /*! Waiting Time (WT) |
| 186 | * @note defined in ISO/IEC 7816-3:2006(E) section 8.1 and 10.2 |
| 187 | */ |
| 188 | uint32_t wt = 9600; |
| 189 | |
Kévin Redon | 7b73462 | 2018-06-06 16:13:48 +0200 | [diff] [blame] | 190 | /*------------------------------------------------------------------------------ |
Kévin Redon | 7b73462 | 2018-06-06 16:13:48 +0200 | [diff] [blame] | 191 | * Internal functions |
| 192 | *------------------------------------------------------------------------------*/ |
Kévin Redon | 36abece | 2018-06-04 16:30:01 +0200 | [diff] [blame] | 193 | |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 194 | /*! Convert data between direct and inverse convention |
| 195 | * @note direct convention is LSb first and HIGH=1; inverse conversion in MSb first and LOW=1 |
| 196 | * @remark use a look up table to speed up conversion |
| 197 | */ |
| 198 | static const uint8_t convention_convert_lut[256] = { 0xff, 0x7f, 0xbf, 0x3f, 0xdf, 0x5f, 0x9f, 0x1f, 0xef, 0x6f, 0xaf, 0x2f, 0xcf, 0x4f, 0x8f, 0x0f, 0xf7, 0x77, 0xb7, 0x37, 0xd7, 0x57, 0x97, 0x17, 0xe7, 0x67, 0xa7, 0x27, 0xc7, 0x47, 0x87, 0x07, 0xfb, 0x7b, 0xbb, 0x3b, 0xdb, 0x5b, 0x9b, 0x1b, 0xeb, 0x6b, 0xab, 0x2b, 0xcb, 0x4b, 0x8b, 0x0b, 0xf3, 0x73, 0xb3, 0x33, 0xd3, 0x53, 0x93, 0x13, 0xe3, 0x63, 0xa3, 0x23, 0xc3, 0x43, 0x83, 0x03, 0xfd, 0x7d, 0xbd, 0x3d, 0xdd, 0x5d, 0x9d, 0x1d, 0xed, 0x6d, 0xad, 0x2d, 0xcd, 0x4d, 0x8d, 0x0d, 0xf5, 0x75, 0xb5, 0x35, 0xd5, 0x55, 0x95, 0x15, 0xe5, 0x65, 0xa5, 0x25, 0xc5, 0x45, 0x85, 0x05, 0xf9, 0x79, 0xb9, 0x39, 0xd9, 0x59, 0x99, 0x19, 0xe9, 0x69, 0xa9, 0x29, 0xc9, 0x49, 0x89, 0x09, 0xf1, 0x71, 0xb1, 0x31, 0xd1, 0x51, 0x91, 0x11, 0xe1, 0x61, 0xa1, 0x21, 0xc1, 0x41, 0x81, 0x01, 0xfe, 0x7e, 0xbe, 0x3e, 0xde, 0x5e, 0x9e, 0x1e, 0xee, 0x6e, 0xae, 0x2e, 0xce, 0x4e, 0x8e, 0x0e, 0xf6, 0x76, 0xb6, 0x36, 0xd6, 0x56, 0x96, 0x16, 0xe6, 0x66, 0xa6, 0x26, 0xc6, 0x46, 0x86, 0x06, 0xfa, 0x7a, 0xba, 0x3a, 0xda, 0x5a, 0x9a, 0x1a, 0xea, 0x6a, 0xaa, 0x2a, 0xca, 0x4a, 0x8a, 0x0a, 0xf2, 0x72, 0xb2, 0x32, 0xd2, 0x52, 0x92, 0x12, 0xe2, 0x62, 0xa2, 0x22, 0xc2, 0x42, 0x82, 0x02, 0xfc, 0x7c, 0xbc, 0x3c, 0xdc, 0x5c, 0x9c, 0x1c, 0xec, 0x6c, 0xac, 0x2c, 0xcc, 0x4c, 0x8c, 0x0c, 0xf4, 0x74, 0xb4, 0x34, 0xd4, 0x54, 0x94, 0x14, 0xe4, 0x64, 0xa4, 0x24, 0xc4, 0x44, 0x84, 0x04, 0xf8, 0x78, 0xb8, 0x38, 0xd8, 0x58, 0x98, 0x18, 0xe8, 0x68, 0xa8, 0x28, 0xc8, 0x48, 0x88, 0x08, 0xf0, 0x70, 0xb0, 0x30, 0xd0, 0x50, 0x90, 0x10, 0xe0, 0x60, 0xa0, 0x20, 0xc0, 0x40, 0x80, 0x00, }; |
| 199 | |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 200 | /*! Update Waiting Time (WT) |
| 201 | * @param[in] wi Waiting Integer (0 if unchanged) |
| 202 | * @param[in] d Baud Rate divider (0 if unchanged) |
| 203 | * @note set wt to be used by the receiver timeout |
| 204 | * @note defined in ISO/IEC 7816-3:2006(E) section 8.1 and 10.2 |
| 205 | */ |
| 206 | static void update_wt(uint8_t wi, uint8_t d) |
| 207 | { |
| 208 | static uint8_t wt_wi = 10; /* Waiting time Integer (WI), used to calculate the Waiting Time (WT) */ |
| 209 | static uint8_t wt_d = 1; /* baud rate adjustment integer (the actual value, not the table index) */ |
| 210 | |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 211 | if (0 != wi) { |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 212 | wt_wi = wi; |
| 213 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 214 | if (0 != d) { |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 215 | wt_d = d; |
| 216 | } |
| 217 | wt = wt_wi*960UL*wt_d; |
| 218 | TRACE_INFO("WT updated to %u\n\r", wt); |
| 219 | } |
| 220 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 221 | /*! Allocate USB buffer and push + initialize simtrace_msg_hdr |
| 222 | * @param[in] ep USB IN endpoint where the message will be sent to |
| 223 | * @param[in] msg_class SIMtrace USB message class |
| 224 | * @param[in] msg_type SIMtrace USB message type |
| 225 | * @return USB message with allocated ans initialized header, or NULL if allocation failed |
| 226 | */ |
| 227 | static struct msgb *usb_msg_alloc_hdr(uint8_t ep, uint8_t msg_class, uint8_t msg_type) |
| 228 | { |
| 229 | struct msgb *usb_msg = usb_buf_alloc(SIMTRACE_USB_EP_CARD_DATAIN); |
| 230 | if (!usb_msg) { |
| 231 | return NULL; |
| 232 | } |
| 233 | struct simtrace_msg_hdr *usb_msg_header; |
| 234 | usb_msg->l1h = msgb_put(usb_msg, sizeof(*usb_msg_header)); |
| 235 | usb_msg_header = (struct simtrace_msg_hdr *) usb_msg->l1h; |
| 236 | memset(usb_msg_header, 0, sizeof(*usb_msg_header)); |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 237 | usb_msg_header->msg_class = msg_class; |
| 238 | usb_msg_header->msg_type = msg_type; |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 239 | usb_msg->l2h = usb_msg->l1h + sizeof(*usb_msg_header); |
| 240 | |
| 241 | return usb_msg; |
| 242 | } |
| 243 | |
| 244 | /* update SIMtrace header msg_len and submit USB buffer |
| 245 | * param[in] usb_msg USB message to update and send |
| 246 | */ |
| 247 | void usb_msg_upd_len_and_submit(struct msgb *usb_msg) |
| 248 | { |
| 249 | struct simtrace_msg_hdr *usb_msg_header = (struct simtrace_msg_hdr *) usb_msg->l1h; |
| 250 | usb_msg_header->msg_len = msgb_length(usb_msg); |
| 251 | usb_buf_submit(usb_msg); |
| 252 | } |
| 253 | |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 254 | /*! Update the ISO 7816-3 state |
| 255 | * @param[in] iso_state_new new ISO 7816-3 state to update to |
| 256 | */ |
| 257 | static void change_state(enum iso7816_3_sniff_state iso_state_new) |
| 258 | { |
| 259 | /* sanity check */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 260 | if (iso_state_new == iso_state) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 261 | TRACE_WARNING("Already in ISO 7816 state %u\n\r", iso_state); |
| 262 | return; |
| 263 | } |
| 264 | |
| 265 | /* handle actions to perform when switching state */ |
| 266 | switch (iso_state_new) { |
| 267 | case ISO7816_S_RESET: |
| 268 | update_fidi(&sniff_usart, 0x11); /* reset baud rate to default Di/Fi values */ |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 269 | update_wt(10, 1); /* reset WT time-out */ |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 270 | change_flags |= SNIFF_CHANGE_FLAG_RESET_HOLD; /* set flag and let main loop send it */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 271 | break; |
| 272 | case ISO7816_S_WAIT_ATR: |
| 273 | rbuf_reset(&sniff_buffer); /* reset buffer for new communication */ |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 274 | change_flags |= SNIFF_CHANGE_FLAG_RESET_RELEASE; /* set flag and let main loop send it */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 275 | break; |
| 276 | case ISO7816_S_IN_ATR: |
| 277 | atr_i = 0; |
| 278 | convention_convert = false; |
| 279 | t_protocol_support = 0; |
| 280 | atr_state = ATR_S_WAIT_TS; |
| 281 | break; |
| 282 | case ISO7816_S_IN_PPS_REQ: |
| 283 | case ISO7816_S_IN_PPS_RSP: |
| 284 | pps_state = PPS_S_WAIT_PPSS; |
| 285 | break; |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 286 | case ISO7816_S_WAIT_TPDU: |
| 287 | tpdu_state = TPDU_S_CLA; |
| 288 | tpdu_packet_i = 0; |
| 289 | break; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 290 | default: |
| 291 | break; |
| 292 | } |
| 293 | |
| 294 | /* save new state */ |
| 295 | iso_state = iso_state_new; |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 296 | //TRACE_INFO("Changed to ISO 7816-3 state %u\n\r", iso_state); /* don't print since this is function is also called by ISRs */ |
| 297 | } |
| 298 | |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 299 | static void usb_send_data(enum simtrace_msg_type_sniff type, const uint8_t* data, uint16_t length, uint32_t flags) |
| 300 | { |
| 301 | /* Sanity check */ |
| 302 | if (type != SIMTRACE_MSGT_SNIFF_ATR && type != SIMTRACE_MSGT_SNIFF_PPS && type != SIMTRACE_MSGT_SNIFF_TPDU) { |
| 303 | return; |
| 304 | } |
| 305 | |
| 306 | /* Show activity on LED */ |
| 307 | led_blink(LED_GREEN, BLINK_2O_F); |
| 308 | |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 309 | /* Print message */ |
| 310 | switch (type) { |
| 311 | case SIMTRACE_MSGT_SNIFF_ATR: |
| 312 | printf("ATR"); |
| 313 | break; |
| 314 | case SIMTRACE_MSGT_SNIFF_PPS: |
| 315 | printf("PPS"); |
| 316 | break; |
| 317 | case SIMTRACE_MSGT_SNIFF_TPDU: |
| 318 | printf("TPDU"); |
| 319 | break; |
| 320 | default: |
| 321 | printf("???"); |
| 322 | break; |
| 323 | } |
| 324 | if (flags) { |
| 325 | printf(" ("); |
| 326 | if (flags & SNIFF_DATA_FLAG_ERROR_INCOMPLETE) { |
| 327 | printf("incomplete"); |
| 328 | flags &= ~SNIFF_DATA_FLAG_ERROR_INCOMPLETE; |
| 329 | if (flags) { |
| 330 | printf(", "); |
| 331 | } |
| 332 | } |
| 333 | if (flags & SNIFF_DATA_FLAG_ERROR_MALFORMED) { |
| 334 | printf("malformed"); |
| 335 | flags &= ~SNIFF_DATA_FLAG_ERROR_MALFORMED; |
| 336 | if (flags) { |
| 337 | printf(", "); |
| 338 | } |
| 339 | } |
| 340 | printf(")"); |
| 341 | } |
| 342 | printf(": "); |
| 343 | uint16_t i; |
| 344 | for (i = 0; i < length; i++) { |
| 345 | printf("%02x ", data[i]); |
| 346 | } |
| 347 | printf("\n\r"); |
Kévin Redon | 411428e | 2018-07-08 15:47:38 +0200 | [diff] [blame^] | 348 | |
| 349 | /* Send data over USB */ |
| 350 | struct msgb *usb_msg = usb_msg_alloc_hdr(SIMTRACE_USB_EP_CARD_DATAIN, SIMTRACE_MSGC_SNIFF, type); |
| 351 | if (!usb_msg) { |
| 352 | return; |
| 353 | } |
| 354 | struct sniff_data *usb_sniff_data = (struct sniff_data *) msgb_put(usb_msg, sizeof(*usb_sniff_data)); |
| 355 | usb_sniff_data->flags = flags; |
| 356 | usb_sniff_data->length = length; |
| 357 | uint8_t *sniff_data = msgb_put(usb_msg, usb_sniff_data->length); |
| 358 | memcpy(sniff_data, data, length); |
| 359 | usb_msg_upd_len_and_submit(usb_msg); |
| 360 | |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 361 | } |
| 362 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 363 | /*! Send current ATR over USB |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 364 | * @param[in] flags SNIFF_DATA_FLAG_ data flags |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 365 | * @note Also print the ATR to debug console |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 366 | */ |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 367 | static void usb_send_atr(uint32_t flags) |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 368 | { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 369 | /* Check state */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 370 | if (ISO7816_S_IN_ATR != iso_state) { |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 371 | TRACE_WARNING("Can't print ATR in ISO 7816-3 state %u\n\r", iso_state); |
| 372 | return; |
| 373 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 374 | if (atr_i >= ARRAY_SIZE(atr)) { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 375 | TRACE_ERROR("ATR buffer overflow\n\r"); |
| 376 | return; |
| 377 | } |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 378 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 379 | /* Send ATR over USB */ |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 380 | usb_send_data(SIMTRACE_MSGT_SNIFF_ATR, atr, atr_i, flags); |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | /*! Process ATR byte |
| 384 | * @param[in] byte ATR byte to process |
| 385 | */ |
| 386 | static void process_byte_atr(uint8_t byte) |
| 387 | { |
| 388 | static uint8_t atr_hist_len = 0; /* store the number of expected historical bytes */ |
| 389 | static uint8_t y = 0; /* last mask of the upcoming TA, TB, TC, TD interface bytes */ |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 390 | static uint8_t i = 0; /* interface byte subgroup number */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 391 | |
| 392 | /* sanity check */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 393 | if (ISO7816_S_IN_ATR != iso_state) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 394 | TRACE_ERROR("Processing ATR data in wrong ISO 7816-3 state %u\n\r", iso_state); |
| 395 | return; |
| 396 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 397 | if (atr_i >= ARRAY_SIZE(atr)) { |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 398 | TRACE_ERROR("ATR data overflow\n\r"); |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 399 | return; |
| 400 | } |
| 401 | |
| 402 | /* save data for use by other functions */ |
| 403 | atr[atr_i++] = byte; |
| 404 | |
| 405 | /* handle ATR byte depending on current state */ |
| 406 | switch (atr_state) { |
| 407 | case ATR_S_WAIT_TS: /* see ISO/IEC 7816-3:2006 section 8.1 */ |
| 408 | switch (byte) { |
| 409 | case 0x23: /* direct convention used, but decoded using inverse convention (a parity error should also have occurred) */ |
| 410 | case 0x30: /* inverse convention used, but decoded using direct convention (a parity error should also have occurred) */ |
| 411 | convention_convert = !convention_convert; |
| 412 | case 0x3b: /* direct convention used and correctly decoded */ |
| 413 | case 0x3f: /* inverse convention used and correctly decoded */ |
| 414 | atr_state = ATR_S_WAIT_T0; /* wait for format byte */ |
| 415 | break; |
| 416 | default: |
| 417 | atr_i--; /* revert last byte */ |
| 418 | TRACE_WARNING("Invalid TS received\n\r"); |
| 419 | } |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 420 | i = 0; /* first interface byte sub-group is coming (T0 is kind of TD0) */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 421 | break; |
| 422 | case ATR_S_WAIT_T0: /* see ISO/IEC 7816-3:2006 section 8.2.2 */ |
| 423 | case ATR_S_WAIT_TD: /* see ISO/IEC 7816-3:2006 section 8.2.3 */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 424 | if (ATR_S_WAIT_T0 == atr_state) { |
| 425 | atr_hist_len = (byte & 0x0f); /* save the number of historical bytes */ |
| 426 | } else if (ATR_S_WAIT_TD == atr_state) { |
| 427 | t_protocol_support |= (1<<(byte & 0x0f)); /* remember supported protocol to know if TCK will be present */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 428 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 429 | y = (byte & 0xf0); /* remember upcoming interface bytes */ |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 430 | i++; /* next interface byte sub-group is coming */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 431 | if (y & 0x10) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 432 | atr_state = ATR_S_WAIT_TA; /* wait for interface byte TA */ |
| 433 | break; |
| 434 | } |
| 435 | case ATR_S_WAIT_TA: /* see ISO/IEC 7816-3:2006 section 8.2.3 */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 436 | if (y & 0x20) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 437 | atr_state = ATR_S_WAIT_TB; /* wait for interface byte TB */ |
| 438 | break; |
| 439 | } |
| 440 | case ATR_S_WAIT_TB: /* see ISO/IEC 7816-3:2006 section 8.2.3 */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 441 | if (y & 0x40) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 442 | atr_state = ATR_S_WAIT_TC; /* wait for interface byte TC */ |
| 443 | break; |
| 444 | } |
| 445 | case ATR_S_WAIT_TC: /* see ISO/IEC 7816-3:2006 section 8.2.3 */ |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 446 | /* retrieve WI encoded in TC2*/ |
| 447 | if (ATR_S_WAIT_TC==atr_state && 2==i) { |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 448 | if (0 == byte) { |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 449 | update_wt(10, 0); |
| 450 | } else { |
| 451 | update_wt(byte, 0); |
| 452 | } |
| 453 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 454 | if (y & 0x80) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 455 | atr_state = ATR_S_WAIT_TD; /* wait for interface byte TD */ |
| 456 | break; |
| 457 | } else if (atr_hist_len) { |
| 458 | atr_state = ATR_S_WAIT_HIST; /* wait for historical bytes */ |
| 459 | break; |
| 460 | } |
| 461 | case ATR_S_WAIT_HIST: /* see ISO/IEC 7816-3:2006 section 8.2.4 */ |
| 462 | if (atr_hist_len) { |
| 463 | atr_hist_len--; |
| 464 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 465 | if (0 == atr_hist_len) { |
| 466 | if (t_protocol_support > 1) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 467 | atr_state = ATR_S_WAIT_TCK; /* wait for check bytes */ |
| 468 | break; |
| 469 | } |
| 470 | } else { |
| 471 | break; |
| 472 | } |
| 473 | case ATR_S_WAIT_TCK: /* see ISO/IEC 7816-3:2006 section 8.2.5 */ |
| 474 | /* we could verify the checksum, but we are just here to sniff */ |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 475 | usb_send_atr(0); /* send ATR to host software using USB */ |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 476 | change_state(ISO7816_S_WAIT_TPDU); /* go to next state */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 477 | break; |
| 478 | default: |
| 479 | TRACE_INFO("Unknown ATR state %u\n\r", atr_state); |
| 480 | } |
| 481 | } |
| 482 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 483 | /*! Send current PPS over USB |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 484 | * @param[in] flags SNIFF_DATA_FLAG_ data flags |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 485 | * @note Also print the PPS over the debug console |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 486 | */ |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 487 | static void usb_send_pps(uint32_t flags) |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 488 | { |
| 489 | uint8_t *pps_cur; /* current PPS (request or response) */ |
| 490 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 491 | /* Sanity check */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 492 | if (ISO7816_S_IN_PPS_REQ == iso_state) { |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 493 | pps_cur = pps_req; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 494 | } else if (ISO7816_S_IN_PPS_RSP == iso_state) { |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 495 | pps_cur = pps_rsp; |
| 496 | } else { |
| 497 | TRACE_ERROR("Can't print PPS in ISO 7816-3 state %u\n\r", iso_state); |
| 498 | return; |
| 499 | } |
| 500 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 501 | /* Get only relevant data */ |
| 502 | uint8_t pps[6]; |
| 503 | uint8_t pps_i = 0; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 504 | if (pps_state > PPS_S_WAIT_PPSS) { |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 505 | pps[pps_i++] = pps_cur[0]; |
| 506 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 507 | if (pps_state > PPS_S_WAIT_PPS0) { |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 508 | pps[pps_i++] = pps_cur[1]; |
| 509 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 510 | if (pps_state > PPS_S_WAIT_PPS1 && pps_cur[1] & 0x10) { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 511 | pps[pps_i++] = pps_cur[2]; |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 512 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 513 | if (pps_state > PPS_S_WAIT_PPS2 && pps_cur[1] & 0x20) { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 514 | pps[pps_i++] = pps_cur[3]; |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 515 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 516 | if (pps_state > PPS_S_WAIT_PPS3 && pps_cur[1] & 0x40) { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 517 | pps[pps_i++] = pps_cur[4]; |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 518 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 519 | if (pps_state > PPS_S_WAIT_PCK) { |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 520 | pps[pps_i++] = pps_cur[5]; |
| 521 | } |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 522 | |
| 523 | /* Send message over USB */ |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 524 | usb_send_data(SIMTRACE_MSGT_SNIFF_PPS, pps, pps_i, flags); |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | /*! Send Fi/Di change over USB |
| 528 | * @param[in] fidi Fi/Di factor as encoded in TA1 |
| 529 | */ |
| 530 | static void usb_send_fidi(uint8_t fidi) |
| 531 | { |
| 532 | /* Send message over USB */ |
| 533 | struct msgb *usb_msg = usb_msg_alloc_hdr(SIMTRACE_USB_EP_CARD_DATAIN, SIMTRACE_MSGC_SNIFF, SIMTRACE_MSGT_SNIFF_FIDI); |
| 534 | if (!usb_msg) { |
| 535 | return; |
| 536 | } |
| 537 | struct sniff_fidi *usb_sniff_fidi = (struct sniff_fidi *) msgb_put(usb_msg, sizeof(*usb_sniff_fidi)); |
| 538 | usb_sniff_fidi->fidi = fidi; |
| 539 | usb_msg_upd_len_and_submit(usb_msg); |
Kévin Redon | cf59919 | 2018-06-27 16:38:31 +0200 | [diff] [blame] | 540 | } |
| 541 | |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 542 | static void process_byte_pps(uint8_t byte) |
| 543 | { |
| 544 | uint8_t *pps_cur; /* current PPS (request or response) */ |
| 545 | |
| 546 | /* sanity check */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 547 | if (ISO7816_S_IN_PPS_REQ == iso_state) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 548 | pps_cur = pps_req; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 549 | } else if (ISO7816_S_IN_PPS_RSP == iso_state) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 550 | pps_cur = pps_rsp; |
| 551 | } else { |
| 552 | TRACE_ERROR("Processing PPS data in wrong ISO 7816-3 state %u\n\r", iso_state); |
| 553 | return; |
| 554 | } |
| 555 | |
| 556 | /* handle PPS byte depending on current state */ |
| 557 | switch (pps_state) { /* see ISO/IEC 7816-3:2006 section 9.2 */ |
| 558 | case PPS_S_WAIT_PPSS: /*!< initial byte */ |
| 559 | if (0xff) { |
| 560 | pps_cur[0] = byte; |
| 561 | pps_state = PPS_S_WAIT_PPS0; /* go to next state */ |
| 562 | } else { |
| 563 | TRACE_INFO("Invalid PPSS received\n\r"); |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 564 | change_state(ISO7816_S_WAIT_TPDU); /* go back to TPDU state */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 565 | } |
| 566 | break; |
| 567 | case PPS_S_WAIT_PPS0: /*!< format byte */ |
| 568 | pps_cur[1] = byte; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 569 | if (pps_cur[1] & 0x10) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 570 | pps_state = PPS_S_WAIT_PPS1; /* go to next state */ |
| 571 | break; |
| 572 | } |
| 573 | case PPS_S_WAIT_PPS1: /*!< first parameter byte */ |
| 574 | pps_cur[2] = byte; /* not always right but doesn't affect the process */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 575 | if (pps_cur[1] & 0x20) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 576 | pps_state = PPS_S_WAIT_PPS2; /* go to next state */ |
| 577 | break; |
| 578 | } |
| 579 | case PPS_S_WAIT_PPS2: /*!< second parameter byte */ |
| 580 | pps_cur[3] = byte; /* not always right but doesn't affect the process */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 581 | if (pps_cur[1] & 0x40) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 582 | pps_state = PPS_S_WAIT_PPS3; /* go to next state */ |
| 583 | break; |
| 584 | } |
| 585 | case PPS_S_WAIT_PPS3: /*!< third parameter byte */ |
| 586 | pps_cur[4] = byte; /* not always right but doesn't affect the process */ |
| 587 | pps_state = PPS_S_WAIT_PCK; /* go to next state */ |
| 588 | break; |
| 589 | case PPS_S_WAIT_PCK: /*!< check byte */ |
| 590 | pps_cur[5] = byte; /* not always right but doesn't affect the process */ |
| 591 | /* verify the checksum */ |
| 592 | uint8_t check = 0; |
| 593 | check ^= pps_cur[0]; |
| 594 | check ^= pps_cur[1]; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 595 | if (pps_cur[1] & 0x10) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 596 | check ^= pps_cur[2]; |
| 597 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 598 | if (pps_cur[1] & 0x20) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 599 | check ^= pps_cur[3]; |
| 600 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 601 | if (pps_cur[1] & 0x40) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 602 | check ^= pps_cur[4]; |
| 603 | } |
| 604 | check ^= pps_cur[5]; |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 605 | pps_state = PPS_S_WAIT_END; |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 606 | usb_send_pps(0); /* send PPS to host software using USB */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 607 | if (ISO7816_S_IN_PPS_REQ == iso_state) { |
| 608 | if (0 == check) { /* checksum is valid */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 609 | change_state(ISO7816_S_WAIT_PPS_RSP); /* go to next state */ |
| 610 | } else { /* checksum is invalid */ |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 611 | change_state(ISO7816_S_WAIT_TPDU); /* go to next state */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 612 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 613 | } else if (ISO7816_S_IN_PPS_RSP == iso_state) { |
| 614 | if (0 == check) { /* checksum is valid */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 615 | uint8_t fn, dn; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 616 | if (pps_cur[1] & 0x10) { |
| 617 | fn = (pps_cur[2] >> 4); |
| 618 | dn = (pps_cur[2] & 0x0f); |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 619 | } else { |
| 620 | fn = 1; |
| 621 | dn = 1; |
| 622 | } |
Kévin Redon | 7406337 | 2018-07-03 15:57:03 +0200 | [diff] [blame] | 623 | TRACE_INFO("PPS negotiation successful: Fn=%u Dn=%u\n\r", fi_table[fn], di_table[dn]); |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 624 | update_fidi(&sniff_usart, pps_cur[2]); |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 625 | update_wt(0, di_table[dn]); |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 626 | usb_send_fidi(pps_cur[2]); /* send Fi/Di change notification to host software over USB */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 627 | } else { /* checksum is invalid */ |
| 628 | TRACE_INFO("PPS negotiation failed\n\r"); |
| 629 | } |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 630 | change_state(ISO7816_S_WAIT_TPDU); /* go to next state */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 631 | } |
| 632 | break; |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 633 | case PPS_S_WAIT_END: |
| 634 | TRACE_WARNING("Unexpected PPS received %u\n\r", pps_state); |
| 635 | break; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 636 | default: |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 637 | TRACE_WARNING("Unknown PPS state %u\n\r", pps_state); |
| 638 | break; |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 639 | } |
| 640 | } |
| 641 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 642 | /*! Send current TPDU over USB |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 643 | * @param[in] flags SNIFF_DATA_FLAG_ data flags |
Kévin Redon | 35e8bdf | 2018-07-03 16:15:58 +0200 | [diff] [blame] | 644 | * @note Also print the TPDU over the debug console |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 645 | */ |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 646 | static void usb_send_tpdu(uint32_t flags) |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 647 | { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 648 | /* Check state */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 649 | if (ISO7816_S_IN_TPDU != iso_state) { |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 650 | TRACE_WARNING("Can't print TPDU in ISO 7816-3 state %u\n\r", iso_state); |
| 651 | return; |
| 652 | } |
| 653 | |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 654 | /* Send ATR over USB */ |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 655 | usb_send_data(SIMTRACE_MSGT_SNIFF_TPDU, tpdu_packet, tpdu_packet_i, flags); |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | static void process_byte_tpdu(uint8_t byte) |
| 659 | { |
| 660 | /* sanity check */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 661 | if (ISO7816_S_IN_TPDU != iso_state) { |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 662 | TRACE_ERROR("Processing TPDU data in wrong ISO 7816-3 state %u\n\r", iso_state); |
| 663 | return; |
| 664 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 665 | if (tpdu_packet_i >= ARRAY_SIZE(tpdu_packet)) { |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 666 | TRACE_ERROR("TPDU data overflow\n\r"); |
| 667 | return; |
| 668 | } |
| 669 | |
| 670 | /* handle TPDU byte depending on current state */ |
| 671 | switch (tpdu_state) { |
| 672 | case TPDU_S_CLA: |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 673 | if (0xff == byte) { |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 674 | TRACE_WARNING("0xff is not a valid class byte\n\r"); |
Kévin Redon | c9bd715 | 2018-07-03 16:17:00 +0200 | [diff] [blame] | 675 | change_state(ISO7816_S_WAIT_TPDU); /* go back to TPDU state */ |
| 676 | return; |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 677 | } |
| 678 | tpdu_packet_i = 0; |
| 679 | tpdu_packet[tpdu_packet_i++] = byte; |
| 680 | tpdu_state = TPDU_S_INS; |
| 681 | break; |
| 682 | case TPDU_S_INS: |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 683 | if ((0x60 == (byte & 0xf0)) || (0x90 == (byte & 0xf0))) { |
Kévin Redon | c9bd715 | 2018-07-03 16:17:00 +0200 | [diff] [blame] | 684 | TRACE_WARNING("invalid CLA 0x%02x\n\r", byte); |
| 685 | change_state(ISO7816_S_WAIT_TPDU); /* go back to TPDU state */ |
| 686 | return; |
| 687 | } |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 688 | tpdu_packet_i = 1; |
| 689 | tpdu_packet[tpdu_packet_i++] = byte; |
| 690 | tpdu_state = TPDU_S_P1; |
| 691 | break; |
| 692 | case TPDU_S_P1: |
| 693 | tpdu_packet_i = 2; |
| 694 | tpdu_packet[tpdu_packet_i++] = byte; |
| 695 | tpdu_state = TPDU_S_P2; |
| 696 | break; |
| 697 | case TPDU_S_P2: |
| 698 | tpdu_packet_i = 3; |
| 699 | tpdu_packet[tpdu_packet_i++] = byte; |
| 700 | tpdu_state = TPDU_S_P3; |
| 701 | break; |
| 702 | case TPDU_S_P3: |
| 703 | tpdu_packet_i = 4; |
| 704 | tpdu_packet[tpdu_packet_i++] = byte; |
| 705 | tpdu_state = TPDU_S_PROCEDURE; |
| 706 | break; |
| 707 | case TPDU_S_PROCEDURE: |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 708 | if (0x60 == byte) { /* wait for next procedure byte */ |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 709 | break; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 710 | } else if (tpdu_packet[1] == byte) { /* get all remaining data bytes */ |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 711 | tpdu_state = TPDU_S_DATA_REMAINING; |
| 712 | break; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 713 | } else if ((~tpdu_packet[1]) == byte) { /* get single data byte */ |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 714 | tpdu_state = TPDU_S_DATA_SINGLE; |
| 715 | break; |
| 716 | } |
| 717 | case TPDU_S_SW1: |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 718 | if ((0x60 == (byte & 0xf0)) || (0x90 == (byte & 0xf0))) { /* this procedure byte is SW1 */ |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 719 | tpdu_packet[tpdu_packet_i++] = byte; |
| 720 | tpdu_state = TPDU_S_SW2; |
| 721 | } else { |
| 722 | TRACE_WARNING("invalid SW1 0x%02x\n\r", byte); |
Kévin Redon | c9bd715 | 2018-07-03 16:17:00 +0200 | [diff] [blame] | 723 | change_state(ISO7816_S_WAIT_TPDU); /* go back to TPDU state */ |
| 724 | return; |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 725 | } |
| 726 | break; |
| 727 | case TPDU_S_SW2: |
| 728 | tpdu_packet[tpdu_packet_i++] = byte; |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 729 | usb_send_tpdu(0); /* send TPDU to host software using USB */ |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 730 | change_state(ISO7816_S_WAIT_TPDU); /* this is the end of the TPDU */ |
| 731 | break; |
| 732 | case TPDU_S_DATA_SINGLE: |
| 733 | case TPDU_S_DATA_REMAINING: |
| 734 | tpdu_packet[tpdu_packet_i++] = byte; |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 735 | if (0 == tpdu_packet[4]) { |
| 736 | if (5+256 <= tpdu_packet_i) { |
Kévin Redon | c9bd715 | 2018-07-03 16:17:00 +0200 | [diff] [blame] | 737 | tpdu_state = TPDU_S_PROCEDURE; |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 738 | } |
| 739 | } else { |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 740 | if (5+tpdu_packet[4] <= tpdu_packet_i) { |
Kévin Redon | c9bd715 | 2018-07-03 16:17:00 +0200 | [diff] [blame] | 741 | tpdu_state = TPDU_S_PROCEDURE; |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 742 | } |
| 743 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 744 | if (TPDU_S_DATA_SINGLE == tpdu_state) { |
Kévin Redon | 00ec89d | 2018-06-27 16:41:52 +0200 | [diff] [blame] | 745 | tpdu_state = TPDU_S_PROCEDURE; |
| 746 | } |
| 747 | break; |
| 748 | default: |
| 749 | TRACE_ERROR("unhandled TPDU state %u\n\r", tpdu_state); |
| 750 | } |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 751 | } |
| 752 | |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 753 | /*! Interrupt Service Routine called on USART activity */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 754 | void Sniffer_usart_isr(void) |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 755 | { |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 756 | /* Remaining Waiting Time (WI) counter (>16 bits) */ |
| 757 | static volatile uint32_t wt_remaining = 9600; |
| 758 | |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 759 | /* Read channel status register */ |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 760 | uint32_t csr = sniff_usart.base->US_CSR; |
| 761 | /* Verify if there was an error */ |
| 762 | if (csr & US_CSR_OVRE) { |
| 763 | TRACE_WARNING("USART overrun error\n\r"); |
| 764 | sniff_usart.base->US_CR |= US_CR_RSTSTA; |
| 765 | } |
| 766 | if (csr & US_CSR_FRAME) { |
| 767 | TRACE_WARNING("USART framing error\n\r"); |
| 768 | sniff_usart.base->US_CR |= US_CR_RSTSTA; |
| 769 | } |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 770 | |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 771 | /* Verify if character has been received */ |
| 772 | if (csr & US_CSR_RXRDY) { |
| 773 | /* Read communication data byte between phone and SIM */ |
| 774 | uint8_t byte = sniff_usart.base->US_RHR; |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 775 | /* Reset WT timer */ |
| 776 | wt_remaining = wt; |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 777 | /* Store sniffed data into buffer (also clear interrupt */ |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 778 | if (rbuf_is_full(&sniff_buffer)) { |
| 779 | TRACE_ERROR("USART buffer full\n\r"); |
| 780 | } else { |
| 781 | rbuf_write(&sniff_buffer, byte); |
| 782 | } |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 783 | } |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 784 | |
Kévin Redon | 638cec8 | 2018-06-27 16:42:56 +0200 | [diff] [blame] | 785 | /* Verify it WT timeout occurred, to detect unresponsive card */ |
| 786 | if (csr & US_CSR_TIMEOUT) { |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 787 | if (wt_remaining <= (sniff_usart.base->US_RTOR & 0xffff)) { |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 788 | /* Just set the flag and let the main loop handle it */ |
| 789 | change_flags |= SNIFF_CHANGE_FLAG_TIMEOUT_WT; |
| 790 | /* Reset timeout value */ |
| 791 | wt_remaining = wt; |
| 792 | } else { |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 793 | wt_remaining -= (sniff_usart.base->US_RTOR & 0xffff); /* be sure to subtract the actual timeout since the new might not have been set and reloaded yet */ |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 794 | } |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 795 | if (wt_remaining > 0xffff) { |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 796 | sniff_usart.base->US_RTOR = 0xffff; |
| 797 | } else { |
| 798 | sniff_usart.base->US_RTOR = wt_remaining; |
| 799 | } |
| 800 | /* Stop timeout until next character is received (and clears the timeout flag) */ |
Kévin Redon | 638cec8 | 2018-06-27 16:42:56 +0200 | [diff] [blame] | 801 | sniff_usart.base->US_CR |= US_CR_STTTO; |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 802 | if (!(change_flags & SNIFF_CHANGE_FLAG_TIMEOUT_WT)) { |
| 803 | /* Immediately restart the counter it the WT timeout did not occur (needs the timeout flag to be cleared) */ |
| 804 | sniff_usart.base->US_CR |= US_CR_RETTO; |
| 805 | } |
Kévin Redon | 638cec8 | 2018-06-27 16:42:56 +0200 | [diff] [blame] | 806 | } |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 807 | } |
| 808 | |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 809 | /** PIO interrupt service routine to checks if the card reset line has changed |
| 810 | */ |
| 811 | static void Sniffer_reset_isr(const Pin* pPin) |
| 812 | { |
| 813 | /* Ensure an edge on the reset pin cause the interrupt */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 814 | if (pPin->id != pin_rst.id || 0 == (pPin->mask & pin_rst.mask)) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 815 | TRACE_ERROR("Pin other than reset caused a interrupt\n\r"); |
| 816 | return; |
| 817 | } |
| 818 | /* Update the ISO state according to the reset change */ |
| 819 | if (PIO_Get(&pin_rst)) { |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 820 | if (ISO7816_S_WAIT_ATR != iso_state) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 821 | change_state(ISO7816_S_WAIT_ATR); |
| 822 | } |
| 823 | } else { |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 824 | if (ISO7816_S_RESET != iso_state) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 825 | change_state(ISO7816_S_RESET); |
| 826 | } |
| 827 | } |
| 828 | } |
| 829 | |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 830 | /*------------------------------------------------------------------------------ |
| 831 | * Global functions |
| 832 | *------------------------------------------------------------------------------*/ |
| 833 | |
| 834 | void Sniffer_usart1_irq(void) |
| 835 | { |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 836 | if (ID_USART1 == sniff_usart.id) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 837 | Sniffer_usart_isr(); |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 838 | } |
| 839 | } |
| 840 | |
| 841 | void Sniffer_usart0_irq(void) |
| 842 | { |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 843 | if (ID_USART0 == sniff_usart.id) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 844 | Sniffer_usart_isr(); |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 845 | } |
| 846 | } |
| 847 | |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 848 | /*----------------------------------------------------------------------------- |
Christina Quast | d2b05f0 | 2015-02-25 18:44:24 +0100 | [diff] [blame] | 849 | * Initialization routine |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 850 | *-----------------------------------------------------------------------------*/ |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 851 | |
Harald Welte | ed75c62 | 2017-11-28 21:23:12 +0100 | [diff] [blame] | 852 | /* Called during USB enumeration after device is enumerated by host */ |
Harald Welte | 7dd3dfd | 2016-03-03 12:32:04 +0100 | [diff] [blame] | 853 | void Sniffer_configure(void) |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 854 | { |
Kévin Redon | 36abece | 2018-06-04 16:30:01 +0200 | [diff] [blame] | 855 | TRACE_INFO("Sniffer config\n\r"); |
Christina Quast | a90eefa | 2015-02-24 17:52:29 +0100 | [diff] [blame] | 856 | } |
Christina Quast | fb524b9 | 2015-02-27 13:39:45 +0100 | [diff] [blame] | 857 | |
Harald Welte | ed75c62 | 2017-11-28 21:23:12 +0100 | [diff] [blame] | 858 | /* called when *different* configuration is set by host */ |
Harald Welte | 7dd3dfd | 2016-03-03 12:32:04 +0100 | [diff] [blame] | 859 | void Sniffer_exit(void) |
Christina Quast | fb524b9 | 2015-02-27 13:39:45 +0100 | [diff] [blame] | 860 | { |
Kévin Redon | 36abece | 2018-06-04 16:30:01 +0200 | [diff] [blame] | 861 | TRACE_INFO("Sniffer exit\n\r"); |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 862 | /* Disable USART */ |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 863 | USART_DisableIt(sniff_usart.base, US_IER_RXRDY); |
| 864 | /* NOTE: don't forget to set the IRQ according to the USART peripheral used */ |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 865 | NVIC_DisableIRQ(IRQ_USART_SIM); |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 866 | USART_SetReceiverEnabled(sniff_usart.base, 0); |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 867 | /* Disable RST IRQ */ |
| 868 | PIO_DisableIt(&pin_rst); |
| 869 | NVIC_DisableIRQ(PIOA_IRQn); /* CAUTION this needs to match to the correct port */ |
Harald Welte | 7dd3dfd | 2016-03-03 12:32:04 +0100 | [diff] [blame] | 870 | } |
| 871 | |
Kévin Redon | 36abece | 2018-06-04 16:30:01 +0200 | [diff] [blame] | 872 | /* called when *Sniffer* configuration is set by host */ |
Harald Welte | 7dd3dfd | 2016-03-03 12:32:04 +0100 | [diff] [blame] | 873 | void Sniffer_init(void) |
| 874 | { |
Kévin Redon | 36abece | 2018-06-04 16:30:01 +0200 | [diff] [blame] | 875 | TRACE_INFO("Sniffer Init\n\r"); |
Kévin Redon | 7b73462 | 2018-06-06 16:13:48 +0200 | [diff] [blame] | 876 | |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 877 | /* Configure pins to sniff communication between phone and card */ |
| 878 | PIO_Configure(pins_sniff, PIO_LISTSIZE(pins_sniff)); |
| 879 | /* Configure pins to connect phone to card */ |
| 880 | PIO_Configure(pins_bus, PIO_LISTSIZE(pins_bus)); |
| 881 | /* Configure pins to forward phone power to card */ |
| 882 | PIO_Configure(pins_power, PIO_LISTSIZE(pins_power)); |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 883 | /* Enable interrupts on port with reset line */ |
| 884 | NVIC_EnableIRQ(PIOA_IRQn); /* CAUTION this needs to match to the correct port */ |
| 885 | /* Register ISR to handle card reset change */ |
| 886 | PIO_ConfigureIt(&pin_rst, &Sniffer_reset_isr); |
| 887 | /* Enable interrupt on card reset pin */ |
| 888 | PIO_EnableIt(&pin_rst); |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 889 | |
Kévin Redon | 7b73462 | 2018-06-06 16:13:48 +0200 | [diff] [blame] | 890 | /* Clear ring buffer containing the sniffed data */ |
| 891 | rbuf_reset(&sniff_buffer); |
Kévin Redon | 45ad62d | 2018-06-07 18:56:41 +0200 | [diff] [blame] | 892 | /* Configure USART to as ISO-7816 slave communication to sniff communication */ |
| 893 | ISO7816_Init(&sniff_usart, CLK_SLAVE); |
| 894 | /* Only receive data when sniffing */ |
| 895 | USART_SetReceiverEnabled(sniff_usart.base, 1); |
King Kévin | 1200a52 | 2018-07-04 10:18:03 +0200 | [diff] [blame] | 896 | /* Enable Receiver time-out to detect waiting time (WT) time-out (e.g. unresponsive cards) */ |
| 897 | sniff_usart.base->US_RTOR = wt; |
Kévin Redon | 638cec8 | 2018-06-27 16:42:56 +0200 | [diff] [blame] | 898 | /* Enable interrupt to indicate when data has been received or timeout occurred */ |
| 899 | USART_EnableIt(sniff_usart.base, US_IER_RXRDY | US_IER_TIMEOUT); |
Kévin Redon | fe763b7 | 2018-07-03 16:17:56 +0200 | [diff] [blame] | 900 | /* Set USB priority lower than USART to not miss sniffing data (both at 0 per default) */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 901 | if (NVIC_GetPriority(IRQ_USART_SIM) >= NVIC_GetPriority(UDP_IRQn)) { |
| 902 | NVIC_SetPriority(UDP_IRQn, NVIC_GetPriority(IRQ_USART_SIM) + 2); |
Kévin Redon | fe763b7 | 2018-07-03 16:17:56 +0200 | [diff] [blame] | 903 | } |
Kévin Redon | d7a6de5 | 2018-06-11 13:46:35 +0200 | [diff] [blame] | 904 | /* Enable interrupt requests for the USART peripheral */ |
| 905 | NVIC_EnableIRQ(IRQ_USART_SIM); |
| 906 | |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 907 | /* Reset state */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 908 | if (ISO7816_S_RESET != iso_state) { |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 909 | change_state(ISO7816_S_RESET); |
| 910 | } |
Harald Welte | 7dd3dfd | 2016-03-03 12:32:04 +0100 | [diff] [blame] | 911 | } |
| 912 | |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 913 | /*! Send card change flags over USB |
| 914 | * @param[in] flags change flags corresponding to SIMTRACE_MSGT_SNIFF_CHANGE |
| 915 | */ |
| 916 | static void usb_send_change(uint32_t flags) |
| 917 | { |
| 918 | /* Check flags */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 919 | if(0 == flags) { /* no changes */ |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 920 | return; |
| 921 | } |
| 922 | |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 923 | if (flags & SNIFF_CHANGE_FLAG_TIMEOUT_WT) { |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 924 | printf("waiting time (WT) timeout\n\r"); |
| 925 | } |
| 926 | |
| 927 | /* Send message over USB */ |
| 928 | struct msgb *usb_msg = usb_msg_alloc_hdr(SIMTRACE_USB_EP_CARD_DATAIN, SIMTRACE_MSGC_SNIFF, SIMTRACE_MSGT_SNIFF_CHANGE); |
| 929 | if (!usb_msg) { |
| 930 | return; |
| 931 | } |
| 932 | struct sniff_change *usb_sniff_change = (struct sniff_change *) msgb_put(usb_msg, sizeof(*usb_sniff_change)); |
| 933 | usb_sniff_change->flags = flags; |
| 934 | usb_msg_upd_len_and_submit(usb_msg); |
| 935 | } |
| 936 | |
Kévin Redon | 8fa6ff5 | 2018-06-25 16:00:33 +0200 | [diff] [blame] | 937 | /* Main (idle/busy) loop of this USB configuration */ |
Harald Welte | 7dd3dfd | 2016-03-03 12:32:04 +0100 | [diff] [blame] | 938 | void Sniffer_run(void) |
| 939 | { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 940 | /* Handle USB queue */ |
| 941 | /* first try to send any pending messages on INT */ |
| 942 | usb_refill_to_host(SIMTRACE_USB_EP_CARD_INT); |
| 943 | /* then try to send any pending messages on IN */ |
| 944 | usb_refill_to_host(SIMTRACE_USB_EP_CARD_DATAIN); |
| 945 | /* ensure we can handle incoming USB messages from the host */ |
| 946 | /* currently we don't need any incoming data |
| 947 | usb_refill_from_host(SIMTRACE_USB_EP_CARD_DATAOUT); |
| 948 | struct llist_head *queue = usb_get_queue(SIMTRACE_USB_EP_CARD_DATAOUT); |
| 949 | process_any_usb_commands(queue); |
| 950 | */ |
| 951 | |
| 952 | /* Handle sniffed data */ |
| 953 | if (!rbuf_is_empty(&sniff_buffer)) { /* use if instead of while to let the main loop restart the watchdog */ |
| 954 | uint8_t byte = rbuf_read(&sniff_buffer); |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 955 | /* Convert convention if required */ |
| 956 | if (convention_convert) { |
| 957 | byte = convention_convert_lut[byte]; |
| 958 | } |
| 959 | //TRACE_ERROR_WP(">%02x", byte); |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 960 | switch (iso_state) { /* Handle byte depending on state */ |
| 961 | case ISO7816_S_RESET: /* During reset we shouldn't receive any data */ |
| 962 | break; |
| 963 | case ISO7816_S_WAIT_ATR: /* After a reset we expect the ATR */ |
| 964 | change_state(ISO7816_S_IN_ATR); /* go to next state */ |
| 965 | case ISO7816_S_IN_ATR: /* More ATR data incoming */ |
| 966 | process_byte_atr(byte); |
| 967 | break; |
| 968 | case ISO7816_S_WAIT_TPDU: /* After the ATR we expect TPDU or PPS data */ |
| 969 | case ISO7816_S_WAIT_PPS_RSP: |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 970 | if (0xff == byte) { |
| 971 | if (ISO7816_S_WAIT_PPS_RSP == iso_state) { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 972 | change_state(ISO7816_S_IN_PPS_RSP); /* Go to PPS state */ |
| 973 | } else { |
| 974 | change_state(ISO7816_S_IN_PPS_REQ); /* Go to PPS state */ |
| 975 | } |
| 976 | process_byte_pps(byte); |
| 977 | break; |
| 978 | } |
| 979 | case ISO7816_S_IN_TPDU: /* More TPDU data incoming */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 980 | if (ISO7816_S_WAIT_TPDU == iso_state) { |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 981 | change_state(ISO7816_S_IN_TPDU); |
| 982 | } |
| 983 | process_byte_tpdu(byte); |
| 984 | break; |
| 985 | case ISO7816_S_IN_PPS_REQ: |
| 986 | case ISO7816_S_IN_PPS_RSP: |
| 987 | process_byte_pps(byte); |
| 988 | break; |
| 989 | default: |
| 990 | TRACE_ERROR("Data received in unknown state %u\n\r", iso_state); |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | /* Handle flags */ |
| 995 | if (change_flags) { /* WARNING this is not synced with the data buffer handling */ |
Kévin Redon | 55f0612 | 2018-07-08 14:13:29 +0200 | [diff] [blame] | 996 | if (change_flags & SNIFF_CHANGE_FLAG_TIMEOUT_WT) { |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 997 | /* Use timeout to detect interrupted data transmission */ |
| 998 | switch (iso_state) { |
| 999 | case ISO7816_S_IN_ATR: |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 1000 | usb_send_atr(SNIFF_DATA_FLAG_ERROR_INCOMPLETE); /* send incomplete ATR to host software using USB */ |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 1001 | change_state(ISO7816_S_WAIT_ATR); |
| 1002 | break; |
| 1003 | case ISO7816_S_IN_TPDU: |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 1004 | usb_send_tpdu(SNIFF_DATA_FLAG_ERROR_INCOMPLETE); /* send incomplete PPS to host software using USB */ |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 1005 | change_state(ISO7816_S_WAIT_TPDU); |
| 1006 | break; |
| 1007 | case ISO7816_S_IN_PPS_REQ: |
| 1008 | case ISO7816_S_IN_PPS_RSP: |
Kévin Redon | f82f0f6 | 2018-07-08 15:10:23 +0200 | [diff] [blame] | 1009 | usb_send_pps(SNIFF_DATA_FLAG_ERROR_INCOMPLETE); /* send incomplete TPDU to host software using USB */ |
Kévin Redon | 709a431 | 2018-07-03 16:10:04 +0200 | [diff] [blame] | 1010 | change_state(ISO7816_S_WAIT_TPDU); |
| 1011 | break; |
| 1012 | default: |
| 1013 | change_flags &= ~SNIFF_CHANGE_FLAG_TIMEOUT_WT; /* We don't care about the timeout is all other cases */ |
| 1014 | break; |
| 1015 | } |
| 1016 | } |
| 1017 | if (change_flags) { |
| 1018 | usb_send_change(change_flags); /* send timeout to host software over USB */ |
| 1019 | change_flags = 0; /* Reset flags */ |
| 1020 | } |
Kévin Redon | de97fd2 | 2018-07-01 18:23:23 +0200 | [diff] [blame] | 1021 | } |
Christina Quast | fb524b9 | 2015-02-27 13:39:45 +0100 | [diff] [blame] | 1022 | } |
Harald Welte | 2fb5996 | 2016-02-28 12:34:26 +0100 | [diff] [blame] | 1023 | #endif /* HAVE_SNIFFER */ |