mirror of
https://github.com/lwvmobile/dsd-fme.git
synced 2026-11-12 16:57:23 -05:00
469 lines
17 KiB
C
469 lines
17 KiB
C
#include "pc5.h"
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#include "dsd.h"
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#include <ctype.h>
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/* Global PC5 context instance */
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PC5Context ctxpc5;
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/* ---------------------------------
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Internal utility functions
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----------------------------------- */
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/* Rotate right */
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static uint32_t ror(uint32_t x, int shift, int bits) {
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uint32_t m0 = (1u << (bits - shift)) - 1u;
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uint32_t m1 = (1u << shift) - 1u;
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return ((x >> shift) & m0) | ((x & m1) << (bits - shift));
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}
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/* Rotate left */
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static uint32_t rol(uint32_t x, int shift, int bits) {
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uint32_t m0 = (1u << (bits - shift)) - 1u;
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uint32_t m1 = (1u << shift) - 1u;
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return ((x & m0) << shift) | ((x >> (bits - shift)) & m1);
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}
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/* SplitMix64 random number generator */
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static uint64_t next_rng(PC5Context *ctxpc5) {
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uint64_t z = (ctxpc5->x += 0x9e3779b97f4a7c15ULL);
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z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9ULL;
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z = (z ^ (z >> 27)) * 0x94d049bb133111ebULL;
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return z ^ (z >> 31);
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}
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/* ARC4 initialization */
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static void arc4_init(PC5Context *ctxpc5, unsigned char key[]) {
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int tmp;
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for (ctxpc5->i_arc4 = 0; ctxpc5->i_arc4 < 256; ctxpc5->i_arc4++)
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ctxpc5->array_arc4[ctxpc5->i_arc4] = (unsigned char)ctxpc5->i_arc4;
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ctxpc5->j_arc4 = 0;
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for (ctxpc5->i_arc4 = 0; ctxpc5->i_arc4 < 256; ctxpc5->i_arc4++) {
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ctxpc5->j_arc4 = (ctxpc5->j_arc4 + ctxpc5->array_arc4[ctxpc5->i_arc4] + key[ctxpc5->i_arc4 % 256]) % 256;
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tmp = ctxpc5->array_arc4[ctxpc5->i_arc4];
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ctxpc5->array_arc4[ctxpc5->i_arc4] = ctxpc5->array_arc4[ctxpc5->j_arc4];
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ctxpc5->array_arc4[ctxpc5->j_arc4] = tmp;
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}
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ctxpc5->i_arc4 = 0;
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ctxpc5->j_arc4 = 0;
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}
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/* ARC4 output combined with SplitMix64 stream */
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static unsigned char arc4_output(PC5Context *ctxpc5) {
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uint8_t rndbyte, decal;
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int tmp, t;
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ctxpc5->i_arc4 = (ctxpc5->i_arc4 + 1) % 256;
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ctxpc5->j_arc4 = (ctxpc5->j_arc4 + ctxpc5->array_arc4[ctxpc5->i_arc4]) % 256;
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tmp = ctxpc5->array_arc4[ctxpc5->i_arc4];
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ctxpc5->array_arc4[ctxpc5->i_arc4] = ctxpc5->array_arc4[ctxpc5->j_arc4];
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ctxpc5->array_arc4[ctxpc5->j_arc4] = tmp;
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t = (ctxpc5->array_arc4[ctxpc5->i_arc4] + ctxpc5->array_arc4[ctxpc5->j_arc4]) % 256;
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if (ctxpc5->xyz == 0) ctxpc5->bb = next_rng(ctxpc5);
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decal = (uint8_t)(56 - (8 * ctxpc5->xyz));
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rndbyte = (uint8_t)((ctxpc5->bb >> decal) & 0xffu);
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ctxpc5->xyz++;
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if (ctxpc5->xyz == 8) ctxpc5->xyz = 0;
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if (ctxpc5->count == 0) {
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rndbyte = (uint8_t)(rndbyte ^ ctxpc5->array_arc4[t]);
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ctxpc5->count = 1;
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} else {
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rndbyte = (uint8_t)(rndbyte + ctxpc5->array_arc4[t]);
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ctxpc5->count = 0;
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}
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return rndbyte;
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}
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/* Initialize MD2-II state */
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static void md2_init(PC5Context *ctxpc5) {
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ctxpc5->x1 = 0;
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ctxpc5->x2 = 0;
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for (ctxpc5->i = 0; ctxpc5->i < n1; ctxpc5->i++) ctxpc5->h2[ctxpc5->i] = 0;
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for (ctxpc5->i = 0; ctxpc5->i < n1; ctxpc5->i++) ctxpc5->h1[ctxpc5->i] = 0;
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}
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/* MD2-II hashing */
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static void md2_hashing(PC5Context *ctxpc5, unsigned char t1[], size_t b6) {
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static const unsigned char s4[256] = {
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13,199,11,67,237,193,164,77,115,184,141,222,73,38,147,36,150,87,21,104,12,61,156,101,111,145,
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119,22,207,35,198,37,171,167,80,30,219,28,213,121,86,29,214,242,6,4,89,162,110,175,19,157,3,
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88,234,94,144,118,159,239,100,17,182,173,238,68,16,79,132,54,163,52,9,58,57,55,229,192,170,226,
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56,231,187,158,70,224,233,245,26,47,32,44,247,8,251,20,197,185,109,153,204,218,93,178,212,137,84,
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174,24,120,130,149,72,180,181,208,255,189,152,18,143,176,60,249,27,227,128,139,243,253,59,123,172,
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108,211,96,138,10,215,42,225,40,81,65,90,25,98,126,154,64,124,116,122,5,1,168,83,190,131,191,244,
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240,235,177,155,228,125,66,43,201,248,220,129,188,230,62,75,71,78,34,31,216,254,136,91,114,106,46,
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217,196,92,151,209,133,51,236,33,252,127,179,69,7,183,105,146,97,39,15,205,112,200,166,223,45,48,
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246,186,41,148,140,107,76,85,95,194,142,50,49,134,23,135,169,221,210,203,63,165,82,161,202,53,14,
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206,232,103,102,195,117,250,99,0,74,160,241,2,113};
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int b1, b2, b3, b4, b5;
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b4 = 0;
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while (b6) {
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for (; b6 && ctxpc5->x2 < n1; b6--, ctxpc5->x2++) {
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b5 = t1[b4++];
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ctxpc5->h1[ctxpc5->x2 + n1] = (unsigned char)b5;
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ctxpc5->h1[ctxpc5->x2 + (n1 * 2)] = (unsigned char)(b5 ^ ctxpc5->h1[ctxpc5->x2]);
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ctxpc5->x1 = ctxpc5->h2[ctxpc5->x2] ^= s4[b5 ^ ctxpc5->x1];
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}
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if (ctxpc5->x2 == n1) {
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b2 = 0;
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ctxpc5->x2 = 0;
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for (b3 = 0; b3 < (n1 + 2); b3++) {
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for (b1 = 0; b1 < (n1 * 3); b1++)
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b2 = ctxpc5->h1[b1] ^= s4[b2];
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b2 = (b2 + b3) % 256;
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}
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}
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}
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}
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/* Finalize MD2-II */
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static void md2_end(PC5Context *ctxpc5, unsigned char h4[n1]) {
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unsigned char h3[n1];
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int i, n4 = n1 - ctxpc5->x2;
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for (i = 0; i < n4; i++) h3[i] = (unsigned char)n4;
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md2_hashing(ctxpc5, h3, (size_t)n4);
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md2_hashing(ctxpc5, ctxpc5->h2, sizeof(ctxpc5->h2));
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for (i = 0; i < n1; i++) h4[i] = ctxpc5->h1[i];
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}
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/* Generate a random index */
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static int mixy(PC5Context *ctxpc5, int nn2) {
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return arc4_output(ctxpc5) % nn2;
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}
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/* Fisher-Yates shuffle */
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static void mixer(PC5Context *ctxpc5, uint8_t *mixu, int nn) {
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int ii, jj, tmmp;
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for (ii = nn - 1; ii > 0; ii--) {
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jj = mixy(ctxpc5, ii + 1);
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tmmp = mixu[jj];
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mixu[jj] = mixu[ii];
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mixu[ii] = (uint8_t)tmmp;
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}
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}
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/* Key schedule and S-box generation */
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void create_keys_pc5(PC5Context *ctxpc5, unsigned char key1[], size_t size1) {
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int i, w, k;
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unsigned char h4[n1];
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md2_init(ctxpc5);
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md2_hashing(ctxpc5, key1, size1);
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md2_end(ctxpc5, h4);
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for (i = 0; i < 16; i++) ctxpc5->keys[i] = h4[i];
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arc4_init(ctxpc5, h4);
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ctxpc5->x = 0;
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for (i = 0; i < 8; i++) ctxpc5->x = (ctxpc5->x << 8) + (uint64_t)(h4[256 + i] & 0xffu);
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ctxpc5->xyz = 0;
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ctxpc5->count = 0;
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for (i = 0; i < 23000; i++) (void)arc4_output(ctxpc5);
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uint8_t numbers[256];
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for (w = 0; w < 253; w++) {
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k = arc4_output(ctxpc5) + 256;
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for (i = 0; i < k; i++) (void)arc4_output(ctxpc5);
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for (i = 0; i < 16; i++) numbers[i] = (uint8_t)i;
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mixer(ctxpc5, numbers, 16);
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for (i = 0; i < 16; i++) ctxpc5->perm[i][w] = numbers[i];
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}
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k = arc4_output(ctxpc5) + 256;
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for (i = 0; i < k; i++) (void)arc4_output(ctxpc5);
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for (i = 0; i < 16; i++) numbers[i] = (uint8_t)i;
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mixer(ctxpc5, numbers, 16);
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for (i = 0; i < 16; i++) ctxpc5->new1[i] = numbers[i];
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k = arc4_output(ctxpc5) + 256;
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for (i = 0; i < k; i++) (void)arc4_output(ctxpc5);
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for (i = 0; i < nbround; i++) ctxpc5->decal[i] = (uint8_t)((arc4_output(ctxpc5) % 11) + 1);
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k = arc4_output(ctxpc5) + 256;
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for (i = 0; i < k; i++) (void)arc4_output(ctxpc5);
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for (w = 0; w < 3; w++)
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for (i = 0; i < nbround; i++)
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ctxpc5->rngxor[i][w] = arc4_output(ctxpc5) % 16;
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k = arc4_output(ctxpc5) + 256;
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for (i = 0; i < k; i++) (void)arc4_output(ctxpc5);
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for (i = 0; i < 16; i++) numbers[i] = (uint8_t)i;
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mixer(ctxpc5, numbers, 16);
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for (i = 0; i < 16; i++) {
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ctxpc5->tab[i] = numbers[i];
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ctxpc5->inv[ctxpc5->tab[i]] = (unsigned char)i;
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}
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k = arc4_output(ctxpc5) + 256;
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for (i = 0; i < k; i++) (void)arc4_output(ctxpc5);
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for (w = 0; w < 3; w++) {
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k = arc4_output(ctxpc5) + 256;
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for (i = 0; i < k; i++) (void)arc4_output(ctxpc5);
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for (i = 0; i < 3; i++) numbers[i] = (uint8_t)i;
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mixer(ctxpc5, numbers, 3);
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for (i = 0; i < 3; i++) ctxpc5->permut[w][i] = numbers[i];
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}
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k = arc4_output(ctxpc5) + 256;
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for (i = 0; i < k; i++) (void)arc4_output(ctxpc5);
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for (w = 0; w < 3; w++)
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for (i = 0; i < nbround; i++)
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ctxpc5->rngxor2[i][w] = arc4_output(ctxpc5) % 16;
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k = arc4_output(ctxpc5) + 256;
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for (w = 0; w < 25; w++) ctxpc5->numbers[w]=arc4_output(ctxpc5) % 2;
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}
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static void compute_pc5(PC5Context *ctxpc5, uint8_t *tab1, uint8_t round) {
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ctxpc5->tot[0] = (uint8_t)((ctxpc5->perm[tab1[ctxpc5->permut[0][0]]][round] +
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ctxpc5->perm[tab1[ctxpc5->permut[0][1]]][round]) ^
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ctxpc5->perm[tab1[ctxpc5->permut[0][2]]][round]);
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ctxpc5->tot[0] = (uint8_t)((ctxpc5->tot[0] + ctxpc5->new1[ctxpc5->tot[0]]) % 16);
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ctxpc5->tot[1] = (uint8_t)((ctxpc5->perm[tab1[ctxpc5->permut[1][0]]][round] +
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ctxpc5->perm[tab1[ctxpc5->permut[1][1]]][round]) ^
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ctxpc5->perm[tab1[ctxpc5->permut[1][2]]][round]);
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ctxpc5->tot[1] = (uint8_t)((ctxpc5->tot[1] + ctxpc5->new1[ctxpc5->tot[1]]) % 16);
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ctxpc5->tot[2] = (uint8_t)((ctxpc5->perm[tab1[ctxpc5->permut[2][0]]][round] +
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ctxpc5->perm[tab1[ctxpc5->permut[2][1]]][round]) ^
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ctxpc5->perm[tab1[ctxpc5->permut[2][2]]][round]);
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ctxpc5->tot[2] = (uint8_t)((ctxpc5->tot[2] + ctxpc5->new1[ctxpc5->tot[2]]) % 16);
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}
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/* Convert bits to bytes */
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void binhexpc5(PC5Context *ctxpc5, short *z, int length) {
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short *b = (short *)z;
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uint8_t i, j;
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for (i = 0; i < length; i = j) {
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uint8_t a = 0;
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for (j = i; j < i + 8; ++j) {
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a |= (uint8_t)(b[((short)(7 - (j % 8)) + j) - (j % 8)] << (j - i));
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}
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ctxpc5->convert[ctxpc5->ptconvert] = a;
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ctxpc5->ptconvert++;
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}
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}
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/* Convert byte to bits */
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void hexbinpc5(PC5Context *ctxpc5, short *q, uint8_t w, uint8_t hex) { // warning: unused parameter ‘ctxpc5’ [-Wunused-parameter]
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UNUSED(ctxpc5);
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short *bits = (short *)q;
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for (uint8_t i = 0; i < 8; ++i) {
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bits[(short)(7 + w) - i] = (short)((hex >> i) & 1u);
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}
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// UNUSEDPC4(ctxpc5); //fix above warning
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}
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/* Encrypt one block */
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void pc5encrypt(PC5Context *ctxpc5) {
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int i;
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int g;
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for (i = 0; i < 3; i++) {
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ctxpc5->l[0][i] = ctxpc5->convert[i];
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ctxpc5->r[0][i] = ctxpc5->convert[i + 3];
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}
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for (i = 1; i <= ctxpc5->rounds; i++) {
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ctxpc5->r[(i - 1) % 2][0] = (ctxpc5->r[(i - 1) % 2][0] + ((uint8_t)~ctxpc5->rngxor2[ctxpc5->rounds - i][0])) % 16;
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ctxpc5->r[(i - 1) % 2][1] = (ctxpc5->r[(i - 1) % 2][1] ^ ((uint8_t)~ctxpc5->rngxor2[ctxpc5->rounds - i][1])) % 16;
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ctxpc5->r[(i - 1) % 2][2] = (ctxpc5->r[(i - 1) % 2][2] + ((uint8_t)~ctxpc5->rngxor2[ctxpc5->rounds - i][2])) % 16;
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ctxpc5->result = 0;
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ctxpc5->result += ((uint32_t)ctxpc5->r[(i - 1) % 2][0] << 8);
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ctxpc5->result += ((uint32_t)ctxpc5->r[(i - 1) % 2][1] << 4);
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ctxpc5->result += ctxpc5->r[(i - 1) % 2][2];
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ctxpc5->result = rol(ctxpc5->result, ctxpc5->decal[i - 1], 12);
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ctxpc5->r[(i - 1) % 2][0] = (uint8_t)(ctxpc5->result >> 8);
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ctxpc5->r[(i - 1) % 2][1] = (uint8_t)((ctxpc5->result >> 4) & 0xfu);
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ctxpc5->r[(i - 1) % 2][2] = (uint8_t)(ctxpc5->result & 0xfu);
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ctxpc5->r[(i - 1) % 2][0] = ctxpc5->tab[ctxpc5->r[(i - 1) % 2][0]];
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ctxpc5->r[(i - 1) % 2][0] = (ctxpc5->r[(i - 1) % 2][0] ^ ctxpc5->rngxor[i - 1][0]) % 16;
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ctxpc5->r[(i - 1) % 2][1] = ctxpc5->inv[ctxpc5->r[(i - 1) % 2][1]];
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if ((ctxpc5->r[(i - 1) % 2][1] - ctxpc5->rngxor[i - 1][1]) < 0) {
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g = (ctxpc5->r[(i - 1) % 2][1] - ctxpc5->rngxor[i - 1][1]) + 16;
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} else {
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g = (ctxpc5->r[(i - 1) % 2][1] - ctxpc5->rngxor[i - 1][1]) % 16;
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}
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ctxpc5->r[(i - 1) % 2][1] = g;
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ctxpc5->r[(i - 1) % 2][2] = ctxpc5->tab[ctxpc5->r[(i - 1) % 2][2]];
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ctxpc5->r[(i - 1) % 2][2] = (ctxpc5->r[(i - 1) % 2][2] ^ ctxpc5->rngxor[i - 1][2]) % 16;
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compute_pc5(ctxpc5, ctxpc5->r[(i - 1) % 2], (uint8_t)((i - 1) % 253));
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ctxpc5->l[i % 2][0] = ctxpc5->r[(i - 1) % 2][0];
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if ((ctxpc5->l[(i - 1) % 2][0] - ctxpc5->tot[0]) < 0) {
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g = (ctxpc5->l[(i - 1) % 2][0] - ctxpc5->tot[0]) + 16;
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} else {
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g = ctxpc5->l[(i - 1) % 2][0] - ctxpc5->tot[0];
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}
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ctxpc5->r[i % 2][0] = g;
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ctxpc5->l[i % 2][1] = ctxpc5->r[(i - 1) % 2][1];
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ctxpc5->r[i % 2][1] = (ctxpc5->l[(i - 1) % 2][1] ^ ctxpc5->tot[1]) % 16;
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ctxpc5->l[i % 2][2] = ctxpc5->r[(i - 1) % 2][2];
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if ((ctxpc5->l[(i - 1) % 2][2] - ctxpc5->tot[2]) < 0) {
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g = (ctxpc5->l[(i - 1) % 2][2] - ctxpc5->tot[2]) + 16;
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} else {
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g = ctxpc5->l[(i - 1) % 2][2] - ctxpc5->tot[2];
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}
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ctxpc5->r[i % 2][2] = g;
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}
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for (i = 0; i < 3; i++) {
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ctxpc5->convert[i + 3] = ctxpc5->l[(ctxpc5->rounds - 1) % 2][i];
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ctxpc5->convert[i] = ctxpc5->r[(ctxpc5->rounds - 1) % 2][i];
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}
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}
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/* Decrypt one block */
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void pc5decrypt(PC5Context *ctxpc5) {
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int i;
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for (i = 0; i < 3; i++) {
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ctxpc5->l[0][i] = ctxpc5->convert[i];
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ctxpc5->r[0][i] = ctxpc5->convert[i + 3];
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}
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ctxpc5->y = (uint8_t)((ctxpc5->rounds - 1) % 253);
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if (ctxpc5->y == 0) ctxpc5->y = 253;
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for (i = 1; i <= ctxpc5->rounds; i++) {
|
||
ctxpc5->y--;
|
||
compute_pc5(ctxpc5, ctxpc5->r[(i - 1) % 2], ctxpc5->y);
|
||
if (ctxpc5->y == 0) ctxpc5->y = 253;
|
||
|
||
ctxpc5->result = 0;
|
||
|
||
ctxpc5->l[(i - 1) % 2][0] ^= ctxpc5->rngxor[ctxpc5->rounds - i][0];
|
||
ctxpc5->l[(i - 1) % 2][0] %= 16;
|
||
ctxpc5->l[(i - 1) % 2][0] = ctxpc5->inv[ctxpc5->l[(i - 1) % 2][0]];
|
||
|
||
ctxpc5->l[(i - 1) % 2][1] += ctxpc5->rngxor[ctxpc5->rounds - i][1];
|
||
ctxpc5->l[(i - 1) % 2][1] %= 16;
|
||
ctxpc5->l[(i - 1) % 2][1] = ctxpc5->tab[ctxpc5->l[(i - 1) % 2][1]];
|
||
|
||
ctxpc5->l[(i - 1) % 2][2] ^= ctxpc5->rngxor[ctxpc5->rounds - i][2];
|
||
ctxpc5->l[(i - 1) % 2][2] %= 16;
|
||
ctxpc5->l[(i - 1) % 2][2] = ctxpc5->inv[ctxpc5->l[(i - 1) % 2][2]];
|
||
|
||
ctxpc5->result += ((uint32_t)ctxpc5->l[(i - 1) % 2][0] << 8);
|
||
ctxpc5->result += ((uint32_t)ctxpc5->l[(i - 1) % 2][1] << 4);
|
||
ctxpc5->result += ctxpc5->l[(i - 1) % 2][2];
|
||
|
||
ctxpc5->result = ror(ctxpc5->result, ctxpc5->decal[ctxpc5->rounds - i], 12);
|
||
|
||
ctxpc5->l[(i - 1) % 2][0] = (uint8_t)(ctxpc5->result >> 8);
|
||
ctxpc5->l[(i - 1) % 2][1] = (uint8_t)((ctxpc5->result >> 4) & 0xfu);
|
||
ctxpc5->l[(i - 1) % 2][2] = (uint8_t)(ctxpc5->result & 0xfu);
|
||
|
||
int temp;
|
||
|
||
temp = ctxpc5->l[(i - 1) % 2][0] - ((uint8_t)(~ctxpc5->rngxor2[i - 1][0]) % 16);
|
||
if (temp < 0) temp += 16;
|
||
ctxpc5->l[(i - 1) % 2][0] = temp % 16;
|
||
|
||
ctxpc5->l[(i - 1) % 2][1] ^= (uint8_t)(~ctxpc5->rngxor2[i - 1][1]) % 16;
|
||
ctxpc5->l[(i - 1) % 2][1] %= 16;
|
||
|
||
temp = ctxpc5->l[(i - 1) % 2][2] - ((uint8_t)(~ctxpc5->rngxor2[i - 1][2]) % 16);
|
||
if (temp < 0) temp += 16;
|
||
ctxpc5->l[(i - 1) % 2][2] = temp % 16;
|
||
|
||
ctxpc5->l[i % 2][0] = ctxpc5->r[(i - 1) % 2][0];
|
||
ctxpc5->r[i % 2][0] = (ctxpc5->l[(i - 1) % 2][0] + ctxpc5->tot[0]) % 16;
|
||
|
||
ctxpc5->l[i % 2][1] = ctxpc5->r[(i - 1) % 2][1];
|
||
ctxpc5->r[i % 2][1] = (ctxpc5->l[(i - 1) % 2][1] ^ ctxpc5->tot[1]) % 16;
|
||
|
||
ctxpc5->l[i % 2][2] = ctxpc5->r[(i - 1) % 2][2];
|
||
ctxpc5->r[i % 2][2] = (ctxpc5->l[(i - 1) % 2][2] + ctxpc5->tot[2]) % 16;
|
||
}
|
||
|
||
for (i = 0; i < 3; i++) {
|
||
ctxpc5->convert[i + 3] = ctxpc5->l[(ctxpc5->rounds - 1) % 2][i];
|
||
ctxpc5->convert[i] = ctxpc5->r[(ctxpc5->rounds - 1) % 2][i];
|
||
}
|
||
}
|
||
|
||
/* Key creation for BAOFENG AP */
|
||
void baofeng_ap_pc5_keystream_creation(dsd_state *state, char *input) {
|
||
|
||
char buf[1024];
|
||
strncpy(buf, input, sizeof(buf) - 1);
|
||
buf[sizeof(buf) - 1] = '\0';
|
||
|
||
// Count hexadecimal characters (without spaces)
|
||
int hex_char_count = 0;
|
||
for (int i = 0; buf[i] != '\0'; i++) {
|
||
if (isxdigit(buf[i])) {
|
||
hex_char_count++;
|
||
}
|
||
}
|
||
|
||
if (hex_char_count == 32) { // 128 bits (32 hex characters)
|
||
unsigned char key1[16] = {0};
|
||
unsigned char key2[16] = {0};
|
||
|
||
char *pEnd;
|
||
uint64_t K1 = strtoull(buf, &pEnd, 16);
|
||
uint64_t K2 = strtoull(pEnd, &pEnd, 16);
|
||
|
||
u64_to_bytes_be_pc5(K1, &key1[0]);
|
||
u64_to_bytes_be_pc5(K2, &key1[8]);
|
||
|
||
// Reverse key for PC5 (only for 128-bit)
|
||
for (int i=0;i<16;i++) key2[i] = key1[15-i];
|
||
|
||
/* Create key schedule */
|
||
create_keys_pc5(&ctxpc5, key2, sizeof(key2));
|
||
ctxpc5.rounds = nbround;
|
||
|
||
fprintf(stderr, "DMR BAOFENG AP (PC5) 128-bit Key %016llX%016llX with Forced Application\n",
|
||
(unsigned long long)K1, (unsigned long long)K2);
|
||
state->baofeng_ap = 1;
|
||
|
||
} else if (hex_char_count == 64) { // 256 bits (64 hex characters)
|
||
// Remove spaces and store as ASCII string (64 bytes)
|
||
char ascii_key[65] = {0}; // 64 characters + null terminator
|
||
int j = 0;
|
||
for (int i = 0; buf[i] != '\0' && j < 64; i++) {
|
||
if (isxdigit(buf[i])) {
|
||
ascii_key[j++] = buf[i];
|
||
}
|
||
}
|
||
ascii_key[64] = '\0';
|
||
|
||
/* Create key schedule */
|
||
create_keys_pc5(&ctxpc5, (unsigned char*)ascii_key, 64);
|
||
ctxpc5.rounds = nbround;
|
||
|
||
fprintf(stderr, "DMR BAOFENG AP (PC5) 256-bit Key: %s with Forced Application\n", ascii_key);
|
||
state->baofeng_ap = 1;
|
||
|
||
} else {
|
||
fprintf(stderr, "ERROR: Invalid key length. Expected 32 chars (128-bit) or 64 chars (256-bit), got %d hex chars\n", hex_char_count);
|
||
return;
|
||
}
|
||
}
|