Implement the buggy version of llXorBase64Strings() for compatibility's sake

avinationmerge
Melanie 2012-07-02 02:04:56 +02:00
parent 7eb95c9ed9
commit 4f04ec5fc2
1 changed files with 84 additions and 3 deletions

View File

@ -8676,10 +8676,91 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
public LSL_String llXorBase64Strings(string str1, string str2) public LSL_String llXorBase64Strings(string str1, string str2)
{ {
m_host.AddScriptLPS(1); string b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
Deprecated("llXorBase64Strings");
ScriptSleep(300); ScriptSleep(300);
m_host.AddScriptLPS(1);
if (str1 == String.Empty)
return String.Empty; return String.Empty;
if (str2 == String.Empty)
return str1;
int len = str2.Length;
if ((len % 4) != 0) // LL is EVIL!!!!
{
while (str2.EndsWith("="))
str2 = str2.Substring(0, str2.Length - 1);
len = str2.Length;
int mod = len % 4;
if (mod == 1)
str2 = str2.Substring(0, str2.Length - 1);
else if (mod == 2)
str2 += "==";
else if (mod == 3)
str2 += "=";
}
byte[] data1;
byte[] data2;
try
{
data1 = Convert.FromBase64String(str1);
data2 = Convert.FromBase64String(str2);
}
catch (Exception)
{
return new LSL_String(String.Empty);
}
// For cases where the decoded length of s2 is greater
// than the decoded length of s1, simply perform a normal
// decode and XOR
//
if (data2.Length >= data1.Length)
{
for (int pos = 0 ; pos < data1.Length ; pos++ )
data1[pos] ^= data2[pos];
return Convert.ToBase64String(data1);
}
// Remove padding
while (str1.EndsWith("="))
str1 = str1.Substring(0, str1.Length - 1);
while (str2.EndsWith("="))
str2 = str2.Substring(0, str2.Length - 1);
byte[] d1 = new byte[str1.Length];
byte[] d2 = new byte[str2.Length];
for (int i = 0 ; i < str1.Length ; i++)
{
int idx = b64.IndexOf(str1.Substring(i, 1));
if (idx == -1)
idx = 0;
d1[i] = (byte)idx;
}
for (int i = 0 ; i < str2.Length ; i++)
{
int idx = b64.IndexOf(str2.Substring(i, 1));
if (idx == -1)
idx = 0;
d2[i] = (byte)idx;
}
string output = String.Empty;
for (int pos = 0 ; pos < d1.Length ; pos++)
output += b64[d1[pos] ^ d2[pos % d2.Length]];
while (output.Length % 3 > 0)
output += "=";
return output;
} }
public void llRemoteDataSetRegion() public void llRemoteDataSetRegion()