// Define globals, permutation tables, and sboxes
// (rodric rabbah, <rabbah@mit.edu>)

static {
    int BITS_PER_WORD  = 32;

    // length of plain text, and cipher text
    int NBITS          = 128;

    // used for key schedule (golden ration)
    int PHI            = 0x9e3779b9;

    // algorithm has 32 total rounds
    int MAXROUNDS      = 32;

    // used for printing descriptor in output
    boolean PRINTINFO  = false;
    int PLAINTEXT      = 0;
    int USERKEY        = 1;
    int CIPHERTEXT     = 2;

    // sample user keys
    int[5][8] USERKEYS = {// 0000000000000000000000000000000000000000000000000000000000000000
                          {0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
                          // 0000000000000000000000000000000000000000000000000000000000000000 (repeated purposefully for testing)
                          {0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
                          // 92efa3ca9477794d31f4df7bce23e60a6038d2d2710373f04fd30aaecea8aa43
                          {0x92efa3ca, 0x9477794d, 0x31f4df7b, 0xce23e60a, 0x6038d2d2, 0x710373f0, 0x4fd30aae, 0xcea8aa43},
                          // d3fc99e32d09420f00a041f7e32914747731be4d4e5b5da518c2abe0a1239fa8
                          {0xd3fc99e3, 0x2d09420f, 0x00a041f7, 0xe3291474, 0x7731be4d, 0x4e5b5da5, 0x18c2abe0, 0xa1239fa8},
                          // bd14742460c6addfc71eef1328e2ddb6ba5b8798bb66c3c4d380acb055cac569
                          {0xbd147424, 0x60c6addf, 0xc71eef13, 0x28e2ddb6, 0xba5b8798, 0xbb66c3c4, 0xd380acb0, 0x55cac569}};
    
    int USERKEY_LENGTH = 8 * BITS_PER_WORD;

    // initial permutation
    int[128] IP = { 0, 32, 64, 96,   1, 33, 65, 97,   2, 34, 66, 98,   3, 35, 67, 99,
                    4, 36, 68, 100,  5, 37, 69, 101,  6, 38, 70, 102,  7, 39, 71, 103,
                    8, 40, 72, 104,  9, 41, 73, 105, 10, 42, 74, 106, 11, 43, 75, 107,
                   12, 44, 76, 108, 13, 45, 77, 109, 14, 46, 78, 110, 15, 47, 79, 111,
                   16, 48, 80, 112, 17, 49, 81, 113, 18, 50, 82, 114, 19, 51, 83, 115,
                   20, 52, 84, 116, 21, 53, 85, 117, 22, 54, 86, 118, 23, 55, 87, 119,
                   24, 56, 88, 120, 25, 57, 89, 121, 26, 58, 90, 122, 27, 59, 91, 123,
                   28, 60, 92, 124, 29, 61, 93, 125, 30, 62, 94, 126, 31, 63, 95, 127};

    // final permutation
    int[128] FP = { 0,  4,  8, 12, 16, 20, 24, 28, 32,  36,  40,  44,  48,  52,  56,  60,
                   64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124,
                    1,  5,  9, 13, 17, 21, 25, 29, 33,  37,  41,  45,  49,  53,  57,  61,
                   65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125,
                    2,  6, 10, 14, 18, 22, 26, 30, 34,  38,  42,  46,  50,  54,  58,  62,
                   66, 70, 74, 78, 82, 86, 90, 94, 98, 102, 106, 110, 114, 118, 122, 126,
                    3,  7, 11, 15, 19, 23, 27, 31, 35,  39,  43,  47,  51,  55,  59,  63,
                   67, 71, 75, 79, 83, 87, 91, 95, 99, 103, 107, 111, 115, 119, 123, 127};

    // substitution boxes
    int[8][16] SBOXES = {{ 3,  8, 15,  1, 10,  6,  5, 11, 14, 13,  4,  2,  7,  0,  9, 12 }, /* S0: */
                         {15, 12,  2,  7,  9,  0,  5, 10,  1, 11, 14,  8,  6, 13,  3,  4 }, /* S1: */
                         { 8,  6,  7,  9,  3, 12, 10, 15, 13,  1, 14,  4,  0, 11,  5,  2 }, /* S2: */
                         { 0, 15, 11,  8, 12,  9,  6,  3, 13,  1,  2,  4, 10,  7,  5, 14 }, /* S3: */
                         { 1, 15,  8,  3, 12,  0, 11,  6,  2,  5,  4, 10,  9, 14,  7, 13 }, /* S4: */
                         {15,  5,  2, 11,  4, 10,  9, 12,  0,  3, 14,  8, 13,  6,  7,  1 }, /* S5: */
                         { 7,  2, 12,  5,  8,  4,  6, 11, 14,  9,  1, 15, 13,  3, 10,  0 }, /* S6: */
                         { 1, 13, 15,  0, 14,  8,  2, 11,  7,  4, 12, 10,  9,  3,  5,  6 }};/* S7: */

     init {}
}