//-----------------------------------------------------------------------------
// Copyright (C) 2019 iceman
//
// 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.
//-----------------------------------------------------------------------------
// LTO-CM commands
// LTO Cartridge memory
//-----------------------------------------------------------------------------
#include "cmdhflto.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <inttypes.h>
#include "cmdparser.h"    // command_t
#include "comms.h"
#include "cmdtrace.h"
#include "crc16.h"
#include "ui.h"
#include "cmdhf14a.h"
#include "protocols.h"

static int CmdHelp(const char *Cmd);

static int usage_lto_info(void) {
    PrintAndLogEx(NORMAL, "Usage:  hf lto info [h]");
    PrintAndLogEx(NORMAL, "Options:");
    PrintAndLogEx(NORMAL, "           h    this help");
    PrintAndLogEx(NORMAL, "");
    PrintAndLogEx(NORMAL, "Examples:");
    PrintAndLogEx(NORMAL, "           hf lto info");
    return PM3_SUCCESS;
}

static int usage_lto_rdbl(void) {
    PrintAndLogEx(NORMAL, "Usage:  hf lto rdbl [h] s <start block> e <end block>");
    PrintAndLogEx(NORMAL, "Options:");
    PrintAndLogEx(NORMAL, "           h     this help");
    PrintAndLogEx(NORMAL, "           s     start block in decimal >= 0");
    PrintAndLogEx(NORMAL, "           e     end block in decimal <= 254");
    PrintAndLogEx(NORMAL, "");
    PrintAndLogEx(NORMAL, "Examples:");
    PrintAndLogEx(NORMAL, "           hf lto rdbl s 0 e 254 - Read data block from 0 to 254");
    return PM3_SUCCESS;
}

static void lto_switch_off_field(void) {
    SendCommandMIX(CMD_HF_ISO14443A_READER, 0, 0, 0, NULL, 0);
}

static void lto_switch_on_field(void) {
    SendCommandMIX(CMD_HF_ISO14443A_READER, ISO14A_CONNECT | ISO14A_NO_SELECT | ISO14A_NO_DISCONNECT | ISO14A_NO_RATS, 0, 0, NULL, 0);
}

// send a raw LTO-CM command, returns the length of the response (0 in case of error)
static int lto_send_cmd_raw(uint8_t *cmd, uint8_t len, uint8_t *response, uint16_t *response_len, bool addcrc, bool is7bits, bool verbose) {

    uint64_t arg0 = ISO14A_RAW | ISO14A_NO_DISCONNECT | ISO14A_NO_RATS;
    uint32_t arg1;

    if (addcrc) {
        arg0 |= ISO14A_APPEND_CRC;
    }
   
    if (is7bits) { 
        arg1 = 7 << 16;
    } else {
        arg1 = 0;
    }

    arg1 |= len;

    SendCommandOLD(CMD_HF_ISO14443A_READER, arg0, arg1, 0, cmd, len);
    PacketResponseNG resp;

    if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
        if (verbose) PrintAndLogEx(WARNING, "timeout while waiting for reply.");
        return PM3_ETIMEOUT;
    }

    if (resp.oldarg[0] == *response_len) {
        *response_len = resp.oldarg[0];
        if (*response_len > 0) {
            memcpy(response, resp.data.asBytes, *response_len);
        }
    } else {
        if (verbose) PrintAndLogEx(WARNING, "Wrong response length (%d != %" PRIu64 ")", *response_len, resp.oldarg[0]);
        return PM3_ESOFT;
    }

    return PM3_SUCCESS;
}

// select a LTO-CM tag. Send WUPA and RID.
static int lto_select(uint8_t *id_response, uint8_t id_len, uint8_t *type_response, bool verbose) {
    // Todo: implement anticollision

    uint8_t resp[] = {0, 0};
    uint16_t resp_len;
    uint8_t wupa_cmd[] = {LTO_REQ_STANDARD};
    uint8_t select_sn_cmd[] = {LTO_SELECT, 0x20};
    uint8_t select_cmd[] = {LTO_SELECT, 0x70, 0, 0, 0, 0, 0};

    resp_len = 2;
    int status = lto_send_cmd_raw(wupa_cmd, sizeof(wupa_cmd), type_response, &resp_len, false, true, verbose);
    if (status == PM3_ETIMEOUT || status == PM3_ESOFT) {
        return PM3_ESOFT; // WUPA failed
    }

    resp_len = id_len;
    status = lto_send_cmd_raw(select_sn_cmd, sizeof(select_sn_cmd), id_response, &resp_len, false, false, verbose);
    if (status == PM3_ETIMEOUT || status == PM3_ESOFT) {
        return PM3_EWRONGANSVER; // REQUEST SERIAL NUMBER failed
    }

    memcpy(select_cmd + 2, id_response, sizeof(select_cmd) - 2);
    resp_len = 1;
    status = lto_send_cmd_raw(select_cmd, sizeof(select_cmd), resp, &resp_len, true, false, verbose);
    if (status == PM3_ETIMEOUT || status == PM3_ESOFT || resp[0] != 0x0A) {
        return PM3_EWRONGANSVER; // SELECT failed
    }

    // tag is now INIT and SELECTED.
    return PM3_SUCCESS;
}

static int CmdHfLTOInfo(const char *Cmd) {

    uint8_t cmdp = 0;
    bool errors = false;
    while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
        switch (tolower(param_getchar(Cmd, cmdp))) {
            case 'h':
                return usage_lto_info();
            default:
                PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
                errors = true;
                break;
        }
    }

    //Validations
    if (errors) {
        usage_lto_info();
        return PM3_EINVARG;
    }

    return infoLTO(true);
}

int infoLTO(bool verbose) {

    clearCommandBuffer();

    lto_switch_on_field();

    uint8_t serial_number[5];
    uint8_t serial_len = sizeof(serial_number);
    uint8_t type_info[2];
    
    int ret_val = lto_select(serial_number, serial_len, type_info, verbose);
    lto_switch_off_field();

    if (ret_val == PM3_SUCCESS) {
        PrintAndLogEx(NORMAL, "");
        PrintAndLogEx(SUCCESS, "TYPE INFO: " _YELLOW_("%s"), sprint_hex_inrow(type_info, sizeof(type_info))); 
        PrintAndLogEx(SUCCESS, "UID: " _YELLOW_("%s"), sprint_hex_inrow(serial_number, sizeof(serial_number)));
    }

    return ret_val;
}

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

static int lto_rdbl(uint8_t blk, uint8_t *block_responce, uint8_t *block_cnt_responce, bool verbose) {

    uint16_t resp_len;
    uint8_t rdbl_cmd[] = {0x30, blk};
    uint8_t rdbl_cnt_cmd[] ={0x80};

    resp_len = 18;
    int status = lto_send_cmd_raw(rdbl_cmd, sizeof(rdbl_cmd), block_responce, &resp_len, true, false, verbose);
    if (status == PM3_ETIMEOUT || status == PM3_ESOFT ) {
        return PM3_EWRONGANSVER; // READ BLOCK failed
    }

    resp_len = 18;
    status = lto_send_cmd_raw(rdbl_cnt_cmd, sizeof(rdbl_cnt_cmd), block_cnt_responce, &resp_len, false, false, verbose);
    if (status == PM3_ETIMEOUT || status == PM3_ESOFT ) {
        return PM3_EWRONGANSVER; // READ BLOCK CONTINUE failed
    }

    return PM3_SUCCESS;
}

int rdblLTO(uint8_t st_blk, uint8_t end_blk, bool verbose) {

    clearCommandBuffer();

    lto_switch_on_field();

    uint8_t serial_number[5];
    uint8_t serial_len = sizeof(serial_number);
    uint8_t type_info[2];
    int ret_val = lto_select(serial_number, serial_len, type_info, verbose);

    if (ret_val != PM3_SUCCESS) {
        lto_switch_off_field();
        return ret_val;
    }

    uint8_t block_data_d00_d15[18];
    uint8_t block_data_d16_d31[18];
    uint8_t block_data[32];

    for(uint8_t i = st_blk; i < end_blk + 1; i++) {
       
        ret_val = lto_rdbl(i, block_data_d00_d15,  block_data_d16_d31, verbose);

        if (ret_val == PM3_SUCCESS) {
            //Remove CRCs
            for (int t = 0; t < 16; t++) {
                block_data[t] = block_data_d00_d15[t];
                block_data[t + 16] = block_data_d16_d31[t];
            }
            
            PrintAndLogEx(SUCCESS, "BLK%03d: " _YELLOW_("%s"), i, sprint_hex_inrow(block_data, sizeof(block_data)));
        } else {
            lto_switch_off_field();
            return ret_val; 
        }
    }

    lto_switch_off_field();
    return ret_val;
}

static int CmdHfLTOReadBlock(const char *Cmd) {

    uint8_t cmdp = 0;
    bool errors = false;
    uint8_t st_blk = 0;
    uint8_t end_blk = 254;

    while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
        switch (tolower(param_getchar(Cmd, cmdp))) {
            case 'h':
                return usage_lto_rdbl();
            case 's':
                st_blk = param_get8(Cmd, cmdp+1);
                if ( end_blk < st_blk ) {
                    errors = true;
                    break;
                }
                cmdp += 2;
                break;

            case 'e':
                end_blk = param_get8(Cmd, cmdp+1);
                if ( end_blk < st_blk ) { 
                    errors = true;
                    break;                                                                                                                                                                                                                                   }
                cmdp += 2;
                break;

            default:
                PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
                errors = true;
                break;
        }
    }

    //Validations
    if (errors) {
        usage_lto_rdbl();
        return PM3_EINVARG;
    }

    return rdblLTO(st_blk, end_blk, true);
}

static command_t CommandTable[] = {
    {"help",    CmdHelp,             AlwaysAvailable, "This help"},
    {"info",    CmdHfLTOInfo,        IfPm3Iso14443a, "Tag information"},
    {"rdbl",    CmdHfLTOReadBlock,   IfPm3Iso14443a, "Read block"},
//    {"wrbl",    CmdHfLTOWriteBlock,  IfPm3Iso14443a, "Write block"},
//    {"sim",     CmdHfLTOSim,         IfPm3Iso14443a, "<uid> Simulate LTO-CM tag"},
    {"list",    CmdHfLTOList,        AlwaysAvailable, "List LTO-CM history"},
    {NULL, NULL, NULL, NULL}
};

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

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