private string DecryptSignature(string js, string signature)
{
var functionLines = GetDecryptionFunctionLines(js);
var decryptor = new Decryptor();
foreach (var functionLine in functionLines)
{
if (decryptor.IsComplete)
{
break;
}
/* Pass TK["do"](a, 36); or TK.BH(a, 1); */
var match = FunctionRegex.Match(functionLine.Replace("[\"", ".").Replace("\"]", ""));
if (match.Success)
{
decryptor.AddFunction(js, match.Groups[1].Value);
}
}
foreach (var functionLine in functionLines)
{
var match = FunctionRegex.Match(functionLine.Replace("[\"", ".").Replace("\"]", ""));
if (match.Success)
{
signature = decryptor.ExecuteFunction(signature, functionLine, match.Groups[1].Value);
}
}
return(signature);
}
private string DecryptSignature(string js, string signature, string decryptFunction)
{
var functionLines = GetDecryptionFunctionLines(js, decryptFunction);
var decryptor = new Decryptor();
foreach (var functionLine in functionLines)
{
if (decryptor.IsComplete)
{
break;
}
var match = FunctionRegex.Match(functionLine);
if (match.Success)
{
decryptor.AddFunction(js, match.Groups[1].Value);
}
}
foreach (var functionLine in functionLines)
{
var match = FunctionRegex.Match(functionLine);
if (match.Success)
{
signature = decryptor.ExecuteFunction(signature, functionLine, match.Groups[1].Value);
}
}
return(signature);
}
private string DecryptSignature(string js, string signature)
{
var functionNameRegex = new Regex(@"\w+(?:.|\[)(\""?\w+(?:\"")?)\]?\(");
var functionLines = GetDecryptionFunctionLines(js);
var decryptor = new Decryptor();
var decipherDefinitionName = Regex.Match(string.Join(";", functionLines), "([\\$_\\w]+).\\w+\\(\\w+,\\d+\\);").Groups[1].Value;
if (string.IsNullOrEmpty(decipherDefinitionName))
{
throw new Exception("Could not find signature decipher definition name. Please report this issue to us.");
}
var decipherDefinitionBody = Regex.Match(js, $@"var\s+{Regex.Escape(decipherDefinitionName)}=\{{(\w+:function\(\w+(,\w+)?\)\{{(.*?)\}}),?\}};", RegexOptions.Singleline).Groups[0].Value;
if (string.IsNullOrEmpty(decipherDefinitionBody))
{
throw new Exception("Could not find signature decipher definition body. Please report this issue to us.");
}
foreach (var functionLine in functionLines)
{
if (decryptor.IsComplete)
{
break;
}
var match = functionNameRegex.Match(functionLine);
if (match.Success)
{
decryptor.AddFunction(decipherDefinitionBody, match.Groups[1].Value);
}
}
foreach (var functionLine in functionLines)
{
var match = functionNameRegex.Match(functionLine);
if (match.Success)
{
signature = decryptor.ExecuteFunction(signature, functionLine, match.Groups[1].Value);
}
}
return(signature);
}