add PSOBB Hangame functions

2024-03-22 22:23:41 -07:00
parent 325f7c6efc
commit 76bc2385ca
6 changed files with 121 additions and 1 deletions
@@ -1,5 +1,6 @@
 #include "SaveFileFormats.hh"

+#include <phosg/Hash.hh>
 #include <stdexcept>
 #include <string>

@@ -633,3 +634,109 @@ const array<uint8_t, 0x0038> PSOBBBaseSystemFile::DEFAULT_JOYSTICK_CONFIG = {
    0x00, 0x00, 0x08, 0x00, 0x01, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
    0x08, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
    0x00, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00};
+
+static uint16_t crc16(const void* data, size_t size) {
+  static const uint16_t table[0x100] = {
+      // clang-format off
+      /* 00 */ 0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD, 0x6536, 0x74BF,
+      /* 08 */ 0x8C48, 0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7,
+      /* 10 */ 0x1081, 0x0108, 0x3393, 0x221A, 0x56A5, 0x472C, 0x75B7, 0x643E,
+      /* 18 */ 0x9CC9, 0x8D40, 0xBFDB, 0xAE52, 0xDAED, 0xCB64, 0xF9FF, 0xE876,
+      /* 20 */ 0x2102, 0x308B, 0x0210, 0x1399, 0x6726, 0x76AF, 0x4434, 0x55BD,
+      /* 28 */ 0xAD4A, 0xBCC3, 0x8E58, 0x9FD1, 0xEB6E, 0xFAE7, 0xC87C, 0xD9F5,
+      /* 30 */ 0x3183, 0x200A, 0x1291, 0x0318, 0x77A7, 0x662E, 0x54B5, 0x453C,
+      /* 38 */ 0xBDCB, 0xAC42, 0x9ED9, 0x8F50, 0xFBEF, 0xEA66, 0xD8FD, 0xC974,
+      /* 40 */ 0x4204, 0x538D, 0x6116, 0x709F, 0x0420, 0x15A9, 0x2732, 0x36BB,
+      /* 48 */ 0xCE4C, 0xDFC5, 0xED5E, 0xFCD7, 0x8868, 0x99E1, 0xAB7A, 0xBAF3,
+      /* 50 */ 0x5285, 0x430C, 0x7197, 0x601E, 0x14A1, 0x0528, 0x37B3, 0x263A,
+      /* 58 */ 0xDECD, 0xCF44, 0xFDDF, 0xEC56, 0x98E9, 0x8960, 0xBBFB, 0xAA72,
+      /* 60 */ 0x6306, 0x728F, 0x4014, 0x519D, 0x2522, 0x34AB, 0x0630, 0x17B9,
+      /* 68 */ 0xEF4E, 0xFEC7, 0xCC5C, 0xDDD5, 0xA96A, 0xB8E3, 0x8A78, 0x9BF1,
+      /* 70 */ 0x7387, 0x620E, 0x5095, 0x411C, 0x35A3, 0x242A, 0x16B1, 0x0738,
+      /* 78 */ 0xFFCF, 0xEE46, 0xDCDD, 0xCD54, 0xB9EB, 0xA862, 0x9AF9, 0x8B70,
+      /* 80 */ 0x8408, 0x9581, 0xA71A, 0xB693, 0xC22C, 0xD3A5, 0xE13E, 0xF0B7,
+      /* 88 */ 0x0840, 0x19C9, 0x2B52, 0x3ADB, 0x4E64, 0x5FED, 0x6D76, 0x7CFF,
+      /* 90 */ 0x9489, 0x8500, 0xB79B, 0xA612, 0xD2AD, 0xC324, 0xF1BF, 0xE036,
+      /* 98 */ 0x18C1, 0x0948, 0x3BD3, 0x2A5A, 0x5EE5, 0x4F6C, 0x7DF7, 0x6C7E,
+      /* A0 */ 0xA50A, 0xB483, 0x8618, 0x9791, 0xE32E, 0xF2A7, 0xC03C, 0xD1B5,
+      /* A8 */ 0x2942, 0x38CB, 0x0A50, 0x1BD9, 0x6F66, 0x7EEF, 0x4C74, 0x5DFD,
+      /* B0 */ 0xB58B, 0xA402, 0x9699, 0x8710, 0xF3AF, 0xE226, 0xD0BD, 0xC134,
+      /* B8 */ 0x39C3, 0x284A, 0x1AD1, 0x0B58, 0x7FE7, 0x6E6E, 0x5CF5, 0x4D7C,
+      /* C0 */ 0xC60C, 0xD785, 0xE51E, 0xF497, 0x8028, 0x91A1, 0xA33A, 0xB2B3,
+      /* C8 */ 0x4A44, 0x5BCD, 0x6956, 0x78DF, 0x0C60, 0x1DE9, 0x2F72, 0x3EFB,
+      /* D0 */ 0xD68D, 0xC704, 0xF59F, 0xE416, 0x90A9, 0x8120, 0xB3BB, 0xA232,
+      /* D8 */ 0x5AC5, 0x4B4C, 0x79D7, 0x685E, 0x1CE1, 0x0D68, 0x3FF3, 0x2E7A,
+      /* E0 */ 0xE70E, 0xF687, 0xC41C, 0xD595, 0xA12A, 0xB0A3, 0x8238, 0x93B1,
+      /* E8 */ 0x6B46, 0x7ACF, 0x4854, 0x59DD, 0x2D62, 0x3CEB, 0x0E70, 0x1FF9,
+      /* F0 */ 0xF78F, 0xE606, 0xD49D, 0xC514, 0xB1AB, 0xA022, 0x92B9, 0x8330,
+      /* F8 */ 0x7BC7, 0x6A4E, 0x58D5, 0x495C, 0x3DE3, 0x2C6A, 0x1EF1, 0x0F78,
+      // clang-format on
+  };
+
+  uint16_t ret = 0xFFFF;
+  StringReader r(data, size);
+  while (!r.eof()) {
+    ret = (ret >> 8) ^ table[r.get_u8() ^ (ret & 0xFF)];
+  }
+  return ret ^ 0xFFFF;
+}
+
+string encode_psobb_hangame_credentials(const string& user_id, const string& token, const string& unused) {
+  if (user_id.size() < 4) {
+    throw runtime_error("user_id must be at least 4 characters");
+  }
+  if (user_id.size() > 12) {
+    throw runtime_error("user_id must be at most 12 characters");
+  }
+  if (!ends_with(user_id, "@HG")) {
+    throw runtime_error("user_id must end with \"@HG\"");
+  }
+  if (token.empty()) {
+    throw runtime_error("token must not be empty");
+  }
+  if (token.size() > 8) {
+    throw runtime_error("token must be at most 8 characters");
+  }
+  for (char ch : token) {
+    if (!isdigit(ch)) {
+      throw runtime_error("token must contain only decimal digits");
+    }
+  }
+  if (unused.size() > 0xFF) {
+    throw runtime_error("unused must be at most 255 characters");
+  }
+
+  // The encoded format is:
+  //   parray<uint8_t, 4> mask_key; // xor this with all bytes starting with checksum
+  //   le_uint16_t checksum; // crc16(&unused, EOF - &unused)
+  //   uint8_t unused;
+  //   uint8_t user_id_size;
+  //   char user_id[user_id_size]; // Length must be in [4, 12] and must end with "@HG"
+  //   uint8_t token_size;
+  //   char token[token_size]; // Length must be in [1, 8] and must be all decimal digits
+  //   uint8_t unused_size;
+  //   char unused[unused_size]; // Ignored (possibly email address?)
+  // We'll fill in mask_key and checksum after all the other fields.
+  string data(7, '\0'); // mask_key, checksum, unused
+  data.push_back(user_id.size());
+  data += user_id;
+  data.push_back(token.size());
+  data += token;
+  data.push_back(unused.size());
+  data += unused;
+
+  uint16_t checksum = crc16(data.data() + 6, data.size() - 6);
+  uint32_t timestamp = time(nullptr);
+  data[0] = (timestamp & 0xFF);
+  data[1] = ((timestamp >> 8) & 0xFF);
+  data[2] = ((timestamp >> 16) & 0xFF);
+  data[3] = ((timestamp >> 24) & 0xFF);
+  data[4] = checksum & 0xFF;
+  data[5] = (checksum >> 8) & 0xFF;
+
+  for (size_t z = 0; z < data.size() - 4; z++) {
+    data[z + 4] ^= data[z % 3];
+  }
+
+  return data;
+}