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This commit is contained in:
Mino 2020-03-18 17:26:28 +09:00
parent 707d8d4041
commit b8db381216
2 changed files with 27 additions and 10 deletions
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31
Dalamud.Bootstrap/SqexArg/EncodedArgument.cs
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@ -66,11 +66,30 @@ namespace Dalamud.Bootstrap.SqexArg
{
var (keyFragment, step) = RecoverKeyFragmentFromChecksum(checksum);
Span<byte> keyBytes = stackalloc byte[8];
var keyCandicate = keyFragment;
while (true)
{
// try with keyCandicate
if (!CreateKey(keyBytes, keyCandicate))
{
var message = $"BUG";
throw new InvalidOperationException(message);
}
var blowfish = new Blowfish(keyBytes);
blowfish.DecryptInPlace();
if (/* if data looks valid, return blowfish */)
{
// ...
// TODO: test if it's looks like valid utf8 string?
// ???
return blowfish;
}
// .. next key plz
try
{
keyCandicate = checked(keyCandicate + step);
@ -82,12 +101,8 @@ namespace Dalamud.Bootstrap.SqexArg
}
}
/// <summary>
///
/// </summary>
/// <param name="keyFragment"></param>
/// <param name="step"></param>
/// <returns></returns>
private static bool CreateKey(Span<byte> destination, uint key) => Utf8Formatter.TryFormat(key, destination, out var _, new StandardFormat('X', 8));
private static (uint keyFragment, uint step) RecoverKeyFragmentFromChecksum(char checksum)
{
if (checksum == NoChecksumMarker)
@ -103,7 +118,7 @@ namespace Dalamud.Bootstrap.SqexArg
}
/// <summary>
/// Converts url safe variant of base64 string to bytes.
/// Converts the url-safe variant of base64 string to bytes.
/// </summary>
/// <param name="payload">A url-safe variant of base64 string.</param>
private static byte[] DecodeUrlSafeBase64(string payload)