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crypto attempts

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raphaeIl
2025-01-11 02:24:07 -05:00
parent 55c3fc1fec
commit 0b12a29289
18 changed files with 6810 additions and 41 deletions
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76
Novaria.Common/Crypto/AeadTool.cs
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@@ -4,6 +4,8 @@ using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using NSec.Cryptography;
using static System.Runtime.InteropServices.JavaScript.JSType;
namespace Novaria.Common.Crypto
{
@@ -12,15 +14,87 @@ namespace Novaria.Common.Crypto
public static readonly byte[] DEFAULT_SERVERLIST_KEY;
public static readonly byte[] DEFAULT_SERVERLIST_IV;
public static readonly byte[] associatedData;
public static byte[] GenerateRandomPublicKey()
{
byte[] key = new byte[96];
using (RandomNumberGenerator rng = RandomNumberGenerator.Create())
{
rng.GetBytes(key);
}
return key;
}
public static ReadOnlySpan<byte> AEADMARK
{
get
{
return AeadTool.associatedData.AsSpan(12, 1);
}
}
public static byte[] key3 { get; set; }
static AeadTool()
{
DEFAULT_SERVERLIST_KEY = new byte[] { 74, 72, 42, 67, 80, 51, 50, 57, 89, 120, 111, 103, 81, 74, 69, 120 };
DEFAULT_SERVERLIST_IV = new byte[] { 225, 92, 61, 72, 193, 89, 3, 64, 50, 61, 50, 145, 59, 128, 99, 72 };
key3 = new byte[32];
associatedData = new byte[13];
// assume AesGcm not supported (frida log)
associatedData[associatedData.Length - 1] = 1;
}
public static bool Dencrypt_ChaCha20(Span<byte> result, ReadOnlySpan<byte> key, ReadOnlySpan<byte> nonce, ReadOnlySpan<byte> data)
{
Algorithm chaCha20Poly = AeadAlgorithm.ChaCha20Poly1305;
KeyBlobFormat keyBlobFormat = KeyBlobFormat.RawSymmetricKey;
KeyCreationParameters keyCreationParameters = default(KeyCreationParameters);
bool result2;
using (Key key2 = Key.Import(chaCha20Poly, key, keyBlobFormat, ref keyCreationParameters))
{
result2 = AeadAlgorithm.ChaCha20Poly1305.Decrypt(key2, nonce, null, data, result);
}
return result2;
}
public static void Encrypt_ChaCha20(Span<byte> result, ReadOnlySpan<byte> key, ReadOnlySpan<byte> nonce, ReadOnlySpan<byte> data, bool needAssociatedData)
{
Algorithm chaCha20Poly = AeadAlgorithm.ChaCha20Poly1305;
KeyBlobFormat keyBlobFormat = KeyBlobFormat.RawSymmetricKey;
KeyCreationParameters keyCreationParameters = default(KeyCreationParameters);
using (Key key2 = Key.Import(chaCha20Poly, key, keyBlobFormat, ref keyCreationParameters))
{
if (!needAssociatedData)
{
AeadAlgorithm.ChaCha20Poly1305.Encrypt(key2, nonce, null, data, result);
} else
{
nonce.CopyTo(AeadTool.associatedData.AsSpan(0, 12));
AeadAlgorithm.ChaCha20Poly1305.Encrypt(key2, nonce, AeadTool.associatedData.AsSpan<byte>(), data, result);
}
}
}
// probably wrong
public static byte[] DecryptAesCBCInfo(byte[] key, byte[] IV, byte[] cipherBytes)
{
return null;
using (Aes aes = Aes.Create())
{
aes.Key = key;
aes.IV = IV;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.PKCS7;
using (ICryptoTransform decryptor = aes.CreateDecryptor())
{
return decryptor.TransformFinalBlock(cipherBytes, 0, cipherBytes.Length);
}
}
}
public static byte[] EncryptAesCBCInfo(byte[] key, byte[] IV, byte[] plainBytes)