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break them a bit more...

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This commit is contained in:
UbitUmarov
2024-02-24 15:47:06 +00:00
parent 121f270414
commit eb9afdaffc
3 changed files with 47 additions and 36 deletions
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39
OpenSim/Framework/Util.cs
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@@ -1368,13 +1368,13 @@ namespace OpenSim.Framework
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static string AESEncrypt(string secret, string plainText)
public static string AESEncrypt(ReadOnlySpan<char> secret, ReadOnlySpan<char> plainText)
{
return AESEncryptString(secret, plainText, string.Empty);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static string AESEncryptTo(string secret, string plainText, string ivString)
public static string AESEncryptTo(ReadOnlySpan<char> secret, ReadOnlySpan<char> plainText, ReadOnlySpan<char> ivString)
{
return AESEncryptString(secret, plainText, ivString);
}
@@ -1388,15 +1388,15 @@ namespace OpenSim.Framework
/// ID...</param>
/// <returns>A string composed by the Initialization Vector bytes and the
/// encrypted text bytes converted to lower case HexString and separated by " : " </returns>
private static string AESEncryptString(string secret, string plainText, string ivString = null)
private static string AESEncryptString(ReadOnlySpan<char> secret, ReadOnlySpan<char> plainText, ReadOnlySpan<char> ivString)
{
if(string.IsNullOrEmpty(secret) || string.IsNullOrEmpty(plainText))
if(secret.Length == 0 || plainText.Length == 0)
return string.Empty;
byte[] iv = string.IsNullOrEmpty(ivString) ?
byte[] iv = ivString.Length == 0 ?
MD5.Create().ComputeHash(UUID.Random().GetBytes()) :
MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(ivString));
byte[] aesKey = SHA256.Create().ComputeHash(Encoding.UTF8.GetBytes(secret));
MD5.Create().ComputeHash(Utils.StringToBytesNoTerm(ivString));
byte[] aesKey = SHA256.Create().ComputeHash(Utils.StringToBytesNoTerm(secret));
byte[] encryptedText;
using (Aes aes = Aes.Create())
@@ -1419,13 +1419,13 @@ namespace OpenSim.Framework
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static string AESDecrypt(string secret, string encryptedText)
public static ReadOnlySpan<char> AESDecrypt(ReadOnlySpan<char> secret, ReadOnlySpan<char> encryptedText)
{
return AESDecryptString(secret, encryptedText, string.Empty);
return AESDecryptString(secret, encryptedText, new ReadOnlySpan<char>());
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static string AESDecryptFrom(string secret, string encryptedText, string ivString)
public static ReadOnlySpan<char> AESDecryptFrom(ReadOnlySpan<char> secret, ReadOnlySpan<char> encryptedText, ReadOnlySpan<char> ivString)
{
return AESDecryptString(secret, encryptedText, ivString);
}
@@ -1440,31 +1440,30 @@ namespace OpenSim.Framework
/// if used in the encription. eg; an avatarID, a SecureSessionID, an object or
/// script ID...</param>
/// <returns>The decrypted string.</returns>
private static string AESDecryptString(string secret, string encryptedText, string ivString = null)
private static ReadOnlySpan<char> AESDecryptString(ReadOnlySpan<char> secret, ReadOnlySpan<char> encryptedText, ReadOnlySpan<char> ivString)
{
if(string.IsNullOrEmpty(secret) || string.IsNullOrEmpty(encryptedText))
if(secret.Length == 0 || encryptedText.Length == 0)
return string.Empty;
string[] encodedParts = encryptedText.Split(":");
if(encodedParts.Length < 2 || encodedParts[1].Length == 0)
int sep = encryptedText.IndexOf(':');
if(sep < 0)
return string.Empty;
byte[] iv;
byte[] buffer;
try
{
iv = string.IsNullOrEmpty(ivString) ?
Convert.FromHexString(encodedParts[0]) :
MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(ivString));
buffer = Convert.FromHexString(encodedParts[1]);
iv = ivString.Length == 0 ?
Convert.FromHexString(encryptedText[..sep]):
MD5.Create().ComputeHash(Utils.StringToBytesNoTerm(ivString));
buffer = Convert.FromHexString(encryptedText[(sep + 1)..]);
}
catch
{
return string.Empty;
}
byte[] aesKey = SHA256.Create().ComputeHash(Encoding.UTF8.GetBytes(secret));
byte[] aesKey = SHA256.Create().ComputeHash(Utils.StringToBytesNoTerm(secret));
using Aes aes = Aes.Create();
aes.Key = aesKey;