From c4ffc26bcf4767cf824226f35b99f3f36eb06489 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Sun, 11 Feb 2018 21:46:33 +0100
Subject: contrib: don't install source code

---
 contrib-noinst/important-stuff/game_data.c | 166 +++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100644 contrib-noinst/important-stuff/game_data.c

(limited to 'contrib-noinst/important-stuff/game_data.c')

diff --git a/contrib-noinst/important-stuff/game_data.c b/contrib-noinst/important-stuff/game_data.c
new file mode 100644
index 00000000..48774187
--- /dev/null
+++ b/contrib-noinst/important-stuff/game_data.c
@@ -0,0 +1,166 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <mxml.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/stat.h>
+#include <string.h>
+
+//First 5 bytes is MD5 hash of "NaturalPoint"
+static uint8_t secret_key[] = {0x0e, 0x9a, 0x63, 0x71, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+static uint8_t S[256] = {0};
+
+static char *decoded = NULL;
+
+static mxml_node_t *xml = NULL;
+static mxml_node_t *tree = NULL;
+
+static void ksa(uint8_t key[], size_t len)
+{
+  unsigned int i, j;
+  for(i = 0; i < 256; ++i){
+    S[i] = i;
+  }
+  j = 0;
+  for(i = 0; i < 256; ++i){
+    j = (j + S[i] + key[i % len]) % 256;
+    uint8_t tmp = S[i];
+    S[i] = S[j];
+    S[j] = tmp;
+  }
+}
+
+static uint8_t rc4()
+{
+  static uint8_t i = 0;
+  static uint8_t j = 0;
+
+  i += 1;
+  j += S[i];
+  uint8_t tmp = S[i];
+  S[i] = S[j];
+  S[j] = tmp;
+  return S[(S[i] + S[j]) % 256];
+}
+
+static bool decrypt_file(const char *fname, bool from_update)
+{
+  uint32_t header[5];
+  size_t datlen;
+  ksa(secret_key, 16);
+  FILE *inp;
+  struct stat fst;
+
+  if((inp = fopen(fname, "rb")) == NULL){
+    printf("Can't open input file '%s'", fname);
+    return false;
+  }
+
+  if(fstat(fileno(inp), &fst) != 0){
+    fclose(inp);
+    printf("Cannot stat file '%s'\n", fname);
+    return false;
+  }
+  
+  if(from_update){
+    if(fread(&header, sizeof(uint32_t), 5, inp) != 5){
+      fclose(inp);
+      printf("Can't read the header - file '%s' is less than 20 bytes long?\n", fname);
+      return false;
+    }
+    datlen = header[4];
+  }else{
+    datlen = fst.st_size;
+  }
+  if((decoded = (char *)malloc(datlen+1)) == NULL){
+    printf("malloc failed!\n");
+    return false;
+  }
+  memset(decoded, 0, datlen+1);
+  size_t i;
+  size_t len = fread(decoded, 1, datlen, inp);
+  (void) len;
+  for(i = 0; i < datlen; ++i) decoded[i] ^= rc4();
+  fclose(inp);
+  
+  //inp = fopen("tmp.dump", "w");
+  //fwrite(decoded, 1, datlen, inp);
+  //fclose(inp);
+  
+  return true;
+}
+
+static bool game_data_init(const char *fname, bool from_update)
+{
+  static bool initialized = false;
+  if(initialized){
+    return true;
+  }
+  if(!decrypt_file(fname, from_update)){
+    printf("Error decrypting file!\n");
+    return false;
+  }
+  xml = mxmlNewXML("1.0");
+  tree = mxmlLoadString(xml, decoded, MXML_TEXT_CALLBACK);
+  return (tree != NULL);
+}
+
+static void game_data_close()
+{
+  mxmlDelete(tree);
+  free(decoded);
+}
+
+#define ltr_int_log_message(...) fprintf(stderr, __VA_ARGS__)
+
+static void remove_newlines(const char* str, char* out, int out_len)
+{
+    int i, j;
+    int len = strlen(str);
+    for (i = 0, j = 0; str[i] && j + 1 < out_len; i++)
+    {
+        if (str[i] == '\r' || str[i] == '\n')
+            continue;
+        out[j++] = str[i];
+    }
+    if (j < out_len)
+        out[j] = '\0';
+}
+
+bool get_game_data(const char *input_fname, const char *output_fname, bool from_update)
+{
+  FILE *outfile = NULL;
+  if((outfile = (output_fname ? fopen(output_fname, "w") : stdout)) == NULL){
+    ltr_int_log_message("Can't open the output file '%s'!\n", output_fname);
+    return false;
+  }
+  if(!game_data_init(input_fname, from_update)){
+    ltr_int_log_message("Can't process the data file '%s'!\n", input_fname);
+    return false;
+  }
+  
+  mxml_node_t *game;
+  const char *name;
+  const char *id;
+  for(game = mxmlFindElement(tree, tree, "Game", NULL, NULL, MXML_DESCEND);
+      game != NULL;
+      game =  mxmlFindElement(game, tree, "Game", NULL, NULL, MXML_DESCEND))
+  {
+    name = mxmlElementGetAttr(game, "Name");
+    id = mxmlElementGetAttr(game, "Id");
+
+    mxml_node_t *appid = mxmlFindElement(game, game, "ApplicationID", NULL, NULL, MXML_DESCEND);
+    char name_[256];
+    remove_newlines(name, name_, sizeof(name_));
+    if(appid == NULL)
+      fprintf(outfile, "%s \"%s\"\n", id, name_);
+    else
+      fprintf(outfile, "%s \"%s\" (%s)\n", id, name_, appid->child->value.text.string);
+  }
+  fclose(outfile);
+  game_data_close();
+  return true;
+}
+
+int main(int argc, char** argv) { return argc > 1 && get_game_data(argv[1], NULL, false); }
-- 
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