//-----------------------------------------------------------------------------
// Copyright (C) 2020 iceman1001
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// High frequency ISO14443A / ST  commands
//-----------------------------------------------------------------------------

#include "cmdhfst.h"
#include <ctype.h>
#include "fileutils.h"
#include "cmdparser.h"     // command_t
#include "comms.h"         // clearCommandBuffer
#include "cmdtrace.h"
#include "crc16.h"
#include "cmdhf14a.h"
#include "protocols.h"     // definitions of ISO14A/7816 protocol
#include "emv/apduinfo.h"  // GetAPDUCodeDescription 

#define TIMEOUT 2000
static int CmdHelp(const char *Cmd);

static int usage_hf_st_info(void) {
    PrintAndLogEx(NORMAL, "Usage: hf st info [h]");
    PrintAndLogEx(NORMAL, "Options:");
    PrintAndLogEx(NORMAL, "       h    this help");
    PrintAndLogEx(NORMAL, "Example:");
    PrintAndLogEx(NORMAL, _YELLOW_("       hf st info"));
    return PM3_SUCCESS;
}

static int usage_hf_st_sim(void) {
    PrintAndLogEx(NORMAL, "\n Emulating ST25TA512B tag with 7 byte UID\n");
    PrintAndLogEx(NORMAL, "Usage: hf st sim [h] u <uid> ");
    PrintAndLogEx(NORMAL, "Options:");
    PrintAndLogEx(NORMAL, "    h     : This help");
    PrintAndLogEx(NORMAL, "    u     : 7 byte UID");
    PrintAndLogEx(NORMAL, "Examples:");
    PrintAndLogEx(NORMAL, _YELLOW_("          hf 14a sim u 02E2007D0FCA4C"));
    return PM3_SUCCESS;
}
/*
// get ST chip model (from UID) // from ST Microelectronics
static char *get_st_chip_model(uint8_t data) {
    static char model[20];
    char *s = model;
    memset(model, 0, sizeof(model));
    switch (data) {
        case 0x0:
            sprintf(s, "SRIX4K (Special)");
            break;
        case 0x2:
            sprintf(s, "SR176");
            break;
        case 0x3:
            sprintf(s, "SRIX4K");
            break;
        case 0x4:
            sprintf(s, "SRIX512");
            break;
        case 0x6:
            sprintf(s, "SRI512");
            break;
        case 0x7:
            sprintf(s, "SRI4K");
            break;
        case 0xC:
            sprintf(s, "SRT512");
            break;
        default :
            sprintf(s, "Unknown");
            break;
    }
    return s;
}

// print UID info from SRx chips (ST Microelectronics)
static void print_st_general_info(uint8_t *data, uint8_t len) {
    //uid = first 8 bytes in data
    PrintAndLogEx(NORMAL, "");
    PrintAndLogEx(SUCCESS, " UID: " _GREEN_("%s"), sprint_hex(SwapEndian64(data, 8, 8), len));
    PrintAndLogEx(SUCCESS, " MFG: %02X, " _YELLOW_("%s"), data[6], getTagInfo(data[6]));
    PrintAndLogEx(SUCCESS, "Chip: %02X, " _YELLOW_("%s"), data[5] >> 2, get_st_chip_model(data[5] >> 2));
}

*/
static void print_st_cc_info(uint8_t *d, uint8_t n) {
    if (n < 0x0F) {
        PrintAndLogEx(WARNING, "Not enought bytes read from system file");
        return;
    }

    PrintAndLogEx(NORMAL, "");
    PrintAndLogEx(SUCCESS, "------------ " _CYAN_("Capability Container file") " ------------");
    PrintAndLogEx(SUCCESS, " len      %u bytes (" _GREEN_("0x%02X") ")", d[1],d[1]);
    PrintAndLogEx(SUCCESS, " version  %s (" _GREEN_("0x%02X") ")", (d[2] == 0x20) ? "v2.0" : "v1.0", d[2]);

    uint16_t maxr =  (d[3] << 8 | d[4]);
    PrintAndLogEx(SUCCESS, " max bytes read  %u bytes ( 0x%04X )", maxr, maxr);
    uint16_t maxw =  (d[5] << 8 | d[6]);
    PrintAndLogEx(SUCCESS, " max bytes write %u bytes ( 0x%04X )", maxw, maxw);
    PrintAndLogEx(NORMAL, "");
    PrintAndLogEx(SUCCESS, " NDEF file control TLV  {");
    PrintAndLogEx(SUCCESS, "    t        ( %02X )", d[7]);
    PrintAndLogEx(SUCCESS, "    v        ( %02X )", d[8]);
    PrintAndLogEx(SUCCESS, "    file id  ( %02X%02X )", d[9], d[10]);
    
    uint16_t maxndef = (d[11] << 8 | d[12]);
    PrintAndLogEx(SUCCESS, "    max NDEF filesize   %u bytes ( 0x%04X )", maxndef, maxndef);
    PrintAndLogEx(SUCCESS, "    ----- " _CYAN_("access rights") " -------");
    PrintAndLogEx(SUCCESS, "    read   ( %02X )", d[13]);
    PrintAndLogEx(SUCCESS, "    write  ( %02X )", d[14]);
    PrintAndLogEx(SUCCESS, " }");
    PrintAndLogEx(SUCCESS, "----------------- " _CYAN_("raw") " -----------------");
    PrintAndLogEx(SUCCESS, "%s", sprint_hex_inrow(d, n));
    PrintAndLogEx(NORMAL, "");
}
static void print_st_system_info(uint8_t *d, uint8_t n) {
    if (n < 0x12) {
        PrintAndLogEx(WARNING, "Not enought bytes read from system file");
        return;
    }
    
    PrintAndLogEx(NORMAL, "");
    PrintAndLogEx(SUCCESS, "------------ " _CYAN_("ST System file") " ------------");    
    
    uint16_t len =  (d[0] << 8 | d[1]);
    PrintAndLogEx(SUCCESS, " len      %u bytes (" _GREEN_("0x%04X") ")", len, len);

    if (d[2] == 0x80) {
        PrintAndLogEx(SUCCESS, " ST reserved  ( 0x%02X )", d[2]);
    } else {
        PrintAndLogEx(SUCCESS, " GPO Config ( 0x%02X )", d[2]);
    }
    PrintAndLogEx(SUCCESS, " Event counter config ( 0x%02X )", d[3]);

    uint32_t counter =  (d[4] << 16 | d[5] << 8 | d[6]);
    PrintAndLogEx(SUCCESS, " 20bit counter ( 0x%05X )", counter & 0xFFFFF);
    
    PrintAndLogEx(SUCCESS, " Product version ( 0x%02X )", d[7]);
    
    PrintAndLogEx(SUCCESS, " UID   " _GREEN_("%s"), sprint_hex_inrow(d + 8, 7));

    uint16_t mem =  (d[0xF] << 8 | d[0x10]);
    PrintAndLogEx(SUCCESS, " Memory Size - 1   %u bytes (" _GREEN_("0x%04X") ")", mem, mem);
    
    PrintAndLogEx(SUCCESS, " IC Reference code %u ( 0x%02X )", d[0x12], d[0x12]);

    PrintAndLogEx(SUCCESS, "----------------- " _CYAN_("raw") " -----------------");
    PrintAndLogEx(SUCCESS, "%s", sprint_hex_inrow(d, n));
    PrintAndLogEx(NORMAL, "");    
    
    /*
    0012
    80000000001302E2007D0E8DCC
    */
}

static uint16_t get_sw(uint8_t *d, uint8_t n) {
    if (n < 2)
        return 0;
    
    n -= 2;
    return d[n] * 0x0100 + d[n + 1];
}

// ST rothult
int infoHF_ST(void) {

    bool activate_field = true;
    bool keep_field_on = true;
    uint8_t response[PM3_CMD_DATA_SIZE];
    int resplen = 0;
    
    uint8_t aSELECT_AID[80];
    int aSELECT_AID_n = 0;
    param_gethex_to_eol("00a4040007d276000085010100", 0, aSELECT_AID, sizeof(aSELECT_AID), &aSELECT_AID_n);    
    int res = ExchangeAPDU14a(aSELECT_AID, aSELECT_AID_n, activate_field, keep_field_on, response, sizeof(response), &resplen);
    if (res)
        return res;

    if (resplen < 2)
        return PM3_ESOFT;

    uint16_t sw = get_sw(response, resplen);
    if (sw != 0x9000) {
        PrintAndLogEx(ERR, "Selecting NDEF aid failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff));
        return PM3_ESOFT;
    }

    activate_field = false;
    keep_field_on = true;
    // ---------------  CC file reading ----------------
    
    uint8_t aSELECT_FILE_CC[30];
    int aSELECT_FILE_CC_n = 0;
    param_gethex_to_eol("00a4000c02e103", 0, aSELECT_FILE_CC, sizeof(aSELECT_FILE_CC), &aSELECT_FILE_CC_n);    
    res = ExchangeAPDU14a(aSELECT_FILE_CC, aSELECT_FILE_CC_n, activate_field, keep_field_on, response, sizeof(response), &resplen);
    if (res)
        return res;

    sw = get_sw(response, resplen);
    if (sw != 0x9000) {
        PrintAndLogEx(ERR, "Selecting CC file failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff));
        return PM3_ESOFT;
    }
   
    uint8_t aREAD_CC[30];
    int aREAD_CC_n = 0;
    param_gethex_to_eol("00b000000f", 0, aREAD_CC, sizeof(aREAD_CC), &aREAD_CC_n);    
    res = ExchangeAPDU14a(aREAD_CC, aREAD_CC_n, activate_field, keep_field_on, response, sizeof(response), &resplen);
    if (res)
        return res;

    sw = get_sw(response, resplen);
    if (sw != 0x9000) {
        PrintAndLogEx(ERR, "reading CC file failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff));
        return PM3_ESOFT;
    }

    print_st_cc_info(response, resplen - 2);


    // ---------------  System file reading ----------------   
    uint8_t aSELECT_FILE_SYS[30];
    int aSELECT_FILE_SYS_n = 0;
    param_gethex_to_eol("00a4000c02e101", 0, aSELECT_FILE_SYS, sizeof(aSELECT_FILE_SYS), &aSELECT_FILE_SYS_n);    
    res = ExchangeAPDU14a(aSELECT_FILE_SYS, aSELECT_FILE_SYS_n, activate_field, keep_field_on, response, sizeof(response), &resplen);
    if (res)
        return res;

    sw = get_sw(response, resplen);
    if (sw != 0x9000) {
        PrintAndLogEx(ERR, "Selecting system file failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff));
        return PM3_ESOFT;
    }

    keep_field_on = false;
    
    uint8_t aREAD_SYS[30];
    int aREAD_SYS_n = 0;
    param_gethex_to_eol("00b0000012", 0, aREAD_SYS, sizeof(aREAD_SYS), &aREAD_SYS_n);    
    res = ExchangeAPDU14a(aREAD_SYS, aREAD_SYS_n, activate_field, keep_field_on, response, sizeof(response), &resplen);
    if (res)
        return res;

    sw = get_sw(response, resplen);
    if (sw != 0x9000) {
        PrintAndLogEx(ERR, "reading system file failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff));
        return PM3_ESOFT;
    }
    print_st_system_info(response, resplen - 2);
//    PrintAndLogEx(NORMAL, "<<<< %s", sprint_hex(response, resplen));
    return PM3_SUCCESS;
}

// menu command to get and print all info known about any known 14b tag
static int cmd_hf_st_info(const char *Cmd) {
    char c = tolower(param_getchar(Cmd, 0));
    if (c == 'h') return usage_hf_st_info();
    return infoHF_ST();
}

static int cmd_hf_st_sim(const char *Cmd) {
    char c = tolower(param_getchar(Cmd, 0));
    if (c == 'h' || c == 0x00) return usage_hf_st_sim();

    int uidlen = 0;    
    uint8_t cmdp = 0;
    uint8_t uid[7] = {0};
    if (c == 'u') {
        param_gethex_ex(Cmd, cmdp + 1, uid, &uidlen);
        uidlen >>= 1;
        if (uidlen != 7) {
             return usage_hf_st_sim();
        }
    }
    
    char param[40];
    snprintf(param, sizeof(param), "t 10 u %s", sprint_hex_inrow(uid, uidlen));
    return CmdHF14ASim(param);
}

static int cmd_hf_st_list(const char *Cmd) {
    (void)Cmd; // Cmd is not used so far
    CmdTraceList("7816");
    return PM3_SUCCESS;
}

static command_t CommandTable[] = {
    {"help", CmdHelp,         AlwaysAvailable, "This help"},
    {"info", cmd_hf_st_info,  IfPm3Iso14443a,  "Tag information"},
    {"list", cmd_hf_st_list,  AlwaysAvailable, "List ISO 14443A/7816 history"},
    {"sim",  cmd_hf_st_sim,   IfPm3Iso14443a,  "Fake ISO 14443A/ST tag"},
    {NULL, NULL, NULL, NULL}
};

static int CmdHelp(const char *Cmd) {
    (void)Cmd; // Cmd is not used so far
    CmdsHelp(CommandTable);
    return PM3_SUCCESS;
}

int CmdHF_ST(const char *Cmd) {
    clearCommandBuffer();
    return CmdsParse(CommandTable, Cmd);
}