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neru
2026-04-13 01:09:21 -03:00
parent e282a10f4d
commit 441c49d31a
2 changed files with 28 additions and 13 deletions
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src/unlocker/dbdcrypt.cpp
+27 -12
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@@ -53,7 +53,6 @@ std::string DBDCrypt::encrypt(const std::string& data, const std::string& access
return "DbdDAQEB" + b64Enc(fullPayload); return "DbdDAQEB" + b64Enc(fullPayload);
} }
if (type == TYPE_2) if (type == TYPE_2)
{ {
auto transformedKey = transformCDNKey(CDN_KEY_BASE64); auto transformedKey = transformCDNKey(CDN_KEY_BASE64);
@@ -183,13 +182,11 @@ std::string DBDCrypt::decType3(const std::string& data, const std::string& key,
for (char& c : decrypted) for (char& c : decrypted)
c = (char)((unsigned char)c + 1); c = (char)((unsigned char)c + 1);
if (decrypted.length() >= 2 && decrypted.at(1) == '\0') if (decrypted.length() >= 2 && decrypted.at(1) == '\0') decrypted = utf16ToUtf8(decrypted);
decrypted = utf16ToUtf8(decrypted);
decrypted.erase(std::remove(decrypted.begin(), decrypted.end(), (char)0x01), decrypted.end()); decrypted.erase(std::remove(decrypted.begin(), decrypted.end(), (char)0x01), decrypted.end());
decrypted.erase(std::remove(decrypted.begin(), decrypted.end(), (char)0x00), decrypted.end()); decrypted.erase(std::remove(decrypted.begin(), decrypted.end(), (char)0x00), decrypted.end());
for (size_t offset : {0ULL, 4ULL}) for (size_t offset : {0ULL, 4ULL})
{ {
if (offset + 1 < decrypted.size() && (unsigned char)decrypted[offset] == 0x78) if (offset + 1 < decrypted.size() && (unsigned char)decrypted[offset] == 0x78)
@@ -430,19 +427,38 @@ std::string DBDCrypt::utf8ToUtf16(const std::string& utf8)
{ {
if (utf8.empty()) return ""; if (utf8.empty()) return "";
std::string utf16; std::string utf16;
for (size_t i = 0; i < utf8.length(); ) for (size_t i = 0; i < utf8.length();)
{ {
uint32_t cp = 0; uint32_t cp = 0;
unsigned char c = utf8[i]; unsigned char c = utf8[i];
if (c < 0x80) { cp = c; i += 1; } if (c < 0x80)
else if (c < 0xE0) { cp = ((c & 0x1F) << 6) | (utf8[i + 1] & 0x3F); i += 2; } {
else if (c < 0xF0) { cp = ((c & 0x0F) << 12) | ((utf8[i + 1] & 0x3F) << 6) | (utf8[i + 2] & 0x3F); i += 3; } cp = c;
else { cp = ((c & 0x07) << 18) | ((utf8[i + 1] & 0x3F) << 12) | ((utf8[i + 2] & 0x3F) << 6) | (utf8[i + 3] & 0x3F); i += 4; } i += 1;
}
else if (c < 0xE0)
{
cp = ((c & 0x1F) << 6) | (utf8[i + 1] & 0x3F);
i += 2;
}
else if (c < 0xF0)
{
cp = ((c & 0x0F) << 12) | ((utf8[i + 1] & 0x3F) << 6) | (utf8[i + 2] & 0x3F);
i += 3;
}
else
{
cp = ((c & 0x07) << 18) | ((utf8[i + 1] & 0x3F) << 12) | ((utf8[i + 2] & 0x3F) << 6) | (utf8[i + 3] & 0x3F);
i += 4;
}
if (cp < 0x10000) { if (cp < 0x10000)
{
utf16.push_back((char)(cp & 0xFF)); utf16.push_back((char)(cp & 0xFF));
utf16.push_back((char)(cp >> 8)); utf16.push_back((char)(cp >> 8));
} else { }
else
{
cp -= 0x10000; cp -= 0x10000;
uint16_t high = (uint16_t)(0xD800 | (cp >> 10)); uint16_t high = (uint16_t)(0xD800 | (cp >> 10));
uint16_t low = (uint16_t)(0xDC00 | (cp & 0x3FF)); uint16_t low = (uint16_t)(0xDC00 | (cp & 0x3FF));
@@ -455,4 +471,3 @@ std::string DBDCrypt::utf8ToUtf16(const std::string& utf8)
} }
return utf16; return utf16;
} }