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HMAC function, stubs and interfaces for compute hash

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Signed-off-by: UbitUmarov <ajlduarte@sapo.pt>
This commit is contained in:
Vincent Sylvester
2025-04-17 21:19:07 +02:00
committed by UbitUmarov
parent 70eafec6fa
commit 28266fc7b6
3 changed files with 61 additions and 2 deletions
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56
OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
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@@ -19480,13 +19480,65 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
return new LSL_String();
}
static string HMAC_SHA224(string key, string message)
{
const int blockSize = 64;
byte[] keyBytes = Encoding.UTF8.GetBytes(key);
if (keyBytes.Length > blockSize)
{
using (SHA224 sha224 = SHA224.Create())
{
byte[] hashedBytes = sha224.ComputeHash(keyBytes);
}
}
if (keyBytes.Length < blockSize)
{
byte[] tmp = new byte[blockSize];
Array.Copy(keyBytes, tmp, keyBytes.Length);
keyBytes = tmp;
}
byte[] o_key_pad = new byte[blockSize];
byte[] i_key_pad = new byte[blockSize];
for (int i = 0; i < blockSize; i++)
{
o_key_pad[i] = (byte)(keyBytes[i] ^ 0x5c);
i_key_pad[i] = (byte)(keyBytes[i] ^ 0x36);
}
byte[] messageBytes = Encoding.UTF8.GetBytes(message);
byte[] inner = new byte[i_key_pad.Length + messageBytes.Length];
Array.Copy(i_key_pad, 0, inner, 0, i_key_pad.Length);
Array.Copy(messageBytes, 0, inner, i_key_pad.Length, messageBytes.Length);
byte[] innerHash;
using (SHA224 sha224 = SHA224.Create())
{
innerHash = sha224.ComputeHash(inner);
}
byte[] outer = new byte[o_key_pad.Length + innerHash.Length];
Array.Copy(o_key_pad, 0, outer, 0, o_key_pad.Length);
Array.Copy(innerHash, 0, outer, o_key_pad.Length, innerHash.Length);
using (SHA224 sha224 = SHA224.Create())
{
return Util.bytesToLowcaseHexString(sha224.ComputeHash(outer));
}
}
public LSL_String llHMAC(LSL_String private_key, LSL_String message, LSL_String algo)
{
if (private_key.Length < 1 || message.Length < 1)
return new LSL_String();
//if (algo.Equals("sha224"))
// return HMAC_SHA224(private_key, message);
if (algo.Equals("sha224"))
return HMAC_SHA224(private_key, message);
try
{

1
OpenSim/Region/ScriptEngine/Shared/Api/Interface/ILSL_Api.cs
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@@ -534,5 +534,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
LSL_Integer llGetLinkSitFlags(LSL_Integer linknum);
void llSetLinkSitFlags(LSL_Integer linknum, LSL_Integer flags);
LSL_String llHMAC(LSL_String private_key, LSL_String message, LSL_String algo);
LSL_String llComputeHash(LSL_String message, LSL_String algo);
}
}

6
OpenSim/Region/ScriptEngine/Shared/Api/Runtime/LSL_Stub.cs
View File

@@ -2870,5 +2870,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
return m_LSL_Functions.llHMAC(private_key, message, algo);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public LSL_String llComputeHash(LSL_String message, LSL_String algo)
{
return m_LSL_Functions.llComputeHash(message, algo);
}
}
}