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Ludwig
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‎algorithm.c

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#include <inttypes.h>
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/*
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Copyright 2020, Ludwig V. <https://github.com/ludwig-v>
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Original algorithm by Wouter Bokslag & Jason F. <https://github.com/prototux>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License at <http://www.gnu.org/licenses/> for
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more details.
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/* Full credit to Wouter Bokslag & Jason F. - https://github.com/prototux - */
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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*/
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#include <inttypes.h>
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// Transformation function with PSA not-so-secret sauce
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int16_t transform(uint8_t data_msb, uint8_t data_lsb, uint8_t sec[])

‎algorithm.ino

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/*
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Copyright 2020, Ludwig V. <https://github.com/ludwig-v>
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Original algorithm by Wouter Bokslag & Jason F. <https://github.com/prototux>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License at <http://www.gnu.org/licenses/> for
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more details.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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*/
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int transform(byte data_msb, byte data_lsb, byte sec[]) {
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int data = (data_msb << 8) | data_lsb;
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int result = ((data % sec[0]) * sec[2]) - ((data / sec[0]) * sec[1]);

‎algorithmOriginalWork.cs

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/*
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Copyright 2020, Ludwig V. <https://github.com/ludwig-v>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License at <http://www.gnu.org/licenses/> for
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more details.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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*/
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using System;
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public class Program

‎algorithmOriginalWork.php

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<?php
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/*
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Copyright 2020, Ludwig V. <https://github.com/ludwig-v>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License at <http://www.gnu.org/licenses/> for
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more details.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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*/
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function getKey($seedTXT, $appKeyTXT = "0000") { // Some hideous code because PHP is not a strongly typed language, this is working on a 64bits machine
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$seed = str_split($seedTXT, 2);
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$appKey = str_split($appKeyTXT, 2);

‎algorithmSimplified.cs

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/*
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Copyright 2020, Ludwig V. <https://github.com/ludwig-v>
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Original algorithm by Wouter Bokslag & Jason F. <https://github.com/prototux>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License at <http://www.gnu.org/licenses/> for
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more details.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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*/
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using System;
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public class Program
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{
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/* Simplified version for C# based on Wouter Bokslag & Jason F. - https://github.com/prototux - work */
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public static Int32 transform(int data, int[] sec) {
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Int32 result = ((data % sec[0]) * sec[2]) - ((data / sec[0]) * sec[1]);
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if (result < 0)

‎algorithmSimplified.php

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<?php
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/* Simplified version for PHP based on Wouter Bokslag & Jason F. - https://github.com/prototux - work */
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/*
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Copyright 2020, Ludwig V. <https://github.com/ludwig-v>
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Original algorithm by Wouter Bokslag & Jason F. <https://github.com/prototux>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License at <http://www.gnu.org/licenses/> for
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more details.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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*/
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function transform($data, $sec) { // Some hideous code because PHP is not a strongly typed language, this is working on a 64bits machine
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if ($data > 0x7FFF) {

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