131 lines
5.0 KiB
XML
131 lines
5.0 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
|
|
<class name="AESContext" inherits="RefCounted" version="4.0">
|
|
<brief_description>
|
|
Interface to low level AES encryption features.
|
|
</brief_description>
|
|
<description>
|
|
This class provides access to AES encryption/decryption of raw data. Both AES-ECB and AES-CBC mode are supported.
|
|
[codeblocks]
|
|
[gdscript]
|
|
extends Node
|
|
|
|
var aes = AESContext.new()
|
|
|
|
func _ready():
|
|
var key = "My secret key!!!" # Key must be either 16 or 32 bytes.
|
|
var data = "My secret text!!" # Data size must be multiple of 16 bytes, apply padding if needed.
|
|
# Encrypt ECB
|
|
aes.start(AESContext.MODE_ECB_ENCRYPT, key.to_utf8())
|
|
var encrypted = aes.update(data.to_utf8())
|
|
aes.finish()
|
|
# Decrypt ECB
|
|
aes.start(AESContext.MODE_ECB_DECRYPT, key.to_utf8())
|
|
var decrypted = aes.update(encrypted)
|
|
aes.finish()
|
|
# Check ECB
|
|
assert(decrypted == data.to_utf8())
|
|
|
|
var iv = "My secret iv!!!!" # IV must be of exactly 16 bytes.
|
|
# Encrypt CBC
|
|
aes.start(AESContext.MODE_CBC_ENCRYPT, key.to_utf8(), iv.to_utf8())
|
|
encrypted = aes.update(data.to_utf8())
|
|
aes.finish()
|
|
# Decrypt CBC
|
|
aes.start(AESContext.MODE_CBC_DECRYPT, key.to_utf8(), iv.to_utf8())
|
|
decrypted = aes.update(encrypted)
|
|
aes.finish()
|
|
# Check CBC
|
|
assert(decrypted == data.to_utf8())
|
|
[/gdscript]
|
|
[csharp]
|
|
using Godot;
|
|
using System;
|
|
using System.Diagnostics;
|
|
|
|
public class Example : Node
|
|
{
|
|
public AESContext Aes = new AESContext();
|
|
public override void _Ready()
|
|
{
|
|
string key = "My secret key!!!"; // Key must be either 16 or 32 bytes.
|
|
string data = "My secret text!!"; // Data size must be multiple of 16 bytes, apply padding if needed.
|
|
// Encrypt ECB
|
|
Aes.Start(AESContext.Mode.EcbEncrypt, key.ToUTF8());
|
|
byte[] encrypted = Aes.Update(data.ToUTF8());
|
|
Aes.Finish();
|
|
// Decrypt ECB
|
|
Aes.Start(AESContext.Mode.EcbDecrypt, key.ToUTF8());
|
|
byte[] decrypted = Aes.Update(encrypted);
|
|
Aes.Finish();
|
|
// Check ECB
|
|
Debug.Assert(decrypted == data.ToUTF8());
|
|
|
|
string iv = "My secret iv!!!!"; // IV must be of exactly 16 bytes.
|
|
// Encrypt CBC
|
|
Aes.Start(AESContext.Mode.EcbEncrypt, key.ToUTF8(), iv.ToUTF8());
|
|
encrypted = Aes.Update(data.ToUTF8());
|
|
Aes.Finish();
|
|
// Decrypt CBC
|
|
Aes.Start(AESContext.Mode.EcbDecrypt, key.ToUTF8(), iv.ToUTF8());
|
|
decrypted = Aes.Update(encrypted);
|
|
Aes.Finish();
|
|
// Check CBC
|
|
Debug.Assert(decrypted == data.ToUTF8());
|
|
}
|
|
}
|
|
[/csharp]
|
|
[/codeblocks]
|
|
</description>
|
|
<tutorials>
|
|
</tutorials>
|
|
<methods>
|
|
<method name="finish">
|
|
<return type="void" />
|
|
<description>
|
|
Close this AES context so it can be started again. See [method start].
|
|
</description>
|
|
</method>
|
|
<method name="get_iv_state">
|
|
<return type="PackedByteArray" />
|
|
<description>
|
|
Get the current IV state for this context (IV gets updated when calling [method update]). You normally don't need this function.
|
|
[b]Note:[/b] This function only makes sense when the context is started with [constant MODE_CBC_ENCRYPT] or [constant MODE_CBC_DECRYPT].
|
|
</description>
|
|
</method>
|
|
<method name="start">
|
|
<return type="int" enum="Error" />
|
|
<argument index="0" name="mode" type="int" enum="AESContext.Mode" />
|
|
<argument index="1" name="key" type="PackedByteArray" />
|
|
<argument index="2" name="iv" type="PackedByteArray" default="PackedByteArray()" />
|
|
<description>
|
|
Start the AES context in the given [code]mode[/code]. A [code]key[/code] of either 16 or 32 bytes must always be provided, while an [code]iv[/code] (initialization vector) of exactly 16 bytes, is only needed when [code]mode[/code] is either [constant MODE_CBC_ENCRYPT] or [constant MODE_CBC_DECRYPT].
|
|
</description>
|
|
</method>
|
|
<method name="update">
|
|
<return type="PackedByteArray" />
|
|
<argument index="0" name="src" type="PackedByteArray" />
|
|
<description>
|
|
Run the desired operation for this AES context. Will return a [PackedByteArray] containing the result of encrypting (or decrypting) the given [code]src[/code]. See [method start] for mode of operation.
|
|
[b]Note:[/b] The size of [code]src[/code] must be a multiple of 16. Apply some padding if needed.
|
|
</description>
|
|
</method>
|
|
</methods>
|
|
<constants>
|
|
<constant name="MODE_ECB_ENCRYPT" value="0" enum="Mode">
|
|
AES electronic codebook encryption mode.
|
|
</constant>
|
|
<constant name="MODE_ECB_DECRYPT" value="1" enum="Mode">
|
|
AES electronic codebook decryption mode.
|
|
</constant>
|
|
<constant name="MODE_CBC_ENCRYPT" value="2" enum="Mode">
|
|
AES cipher blocker chaining encryption mode.
|
|
</constant>
|
|
<constant name="MODE_CBC_DECRYPT" value="3" enum="Mode">
|
|
AES cipher blocker chaining decryption mode.
|
|
</constant>
|
|
<constant name="MODE_MAX" value="4" enum="Mode">
|
|
Maximum value for the mode enum.
|
|
</constant>
|
|
</constants>
|
|
</class>
|