80 lines
2.8 KiB
XML
80 lines
2.8 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
|
|
<class name="HMACContext" inherits="Reference" version="3.6" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
|
|
<brief_description>
|
|
Used to create an HMAC for a message using a key.
|
|
</brief_description>
|
|
<description>
|
|
The HMACContext class is useful for advanced HMAC use cases, such as streaming the message as it supports creating the message over time rather than providing it all at once.
|
|
[codeblock]
|
|
extends Node
|
|
var ctx = HMACContext.new()
|
|
|
|
func _ready():
|
|
var key = "supersecret".to_utf8()
|
|
var err = ctx.start(HashingContext.HASH_SHA256, key)
|
|
assert(err == OK)
|
|
var msg1 = "this is ".to_utf8()
|
|
var msg2 = "super duper secret".to_utf8()
|
|
err = ctx.update(msg1)
|
|
assert(err == OK)
|
|
err = ctx.update(msg2)
|
|
assert(err == OK)
|
|
var hmac = ctx.finish()
|
|
print(hmac.hex_encode())
|
|
[/codeblock]
|
|
And in C# we can use the following.
|
|
[codeblock]
|
|
using Godot;
|
|
using System;
|
|
using System.Diagnostics;
|
|
|
|
public class CryptoNode : Node
|
|
{
|
|
private HMACContext ctx = new HMACContext();
|
|
public override void _Ready()
|
|
{
|
|
PoolByteArray key = String("supersecret").to_utf8();
|
|
Error err = ctx.Start(HashingContext.HASH_SHA256, key);
|
|
GD.Assert(err == OK);
|
|
PoolByteArray msg1 = String("this is ").to_utf8();
|
|
PoolByteArray msg2 = String("super duper secret").to_utf8();
|
|
err = ctx.Update(msg1);
|
|
GD.Assert(err == OK);
|
|
err = ctx.Update(msg2);
|
|
GD.Assert(err == OK);
|
|
PoolByteArray hmac = ctx.Finish();
|
|
GD.Print(hmac.HexEncode());
|
|
}
|
|
}
|
|
[/codeblock]
|
|
[b]Note:[/b] Not available in HTML5 exports.
|
|
</description>
|
|
<tutorials>
|
|
</tutorials>
|
|
<methods>
|
|
<method name="finish">
|
|
<return type="PoolByteArray" />
|
|
<description>
|
|
Returns the resulting HMAC. If the HMAC failed, an empty [PoolByteArray] is returned.
|
|
</description>
|
|
</method>
|
|
<method name="start">
|
|
<return type="int" enum="Error" />
|
|
<argument index="0" name="hash_type" type="int" enum="HashingContext.HashType" />
|
|
<argument index="1" name="key" type="PoolByteArray" />
|
|
<description>
|
|
Initializes the HMACContext. This method cannot be called again on the same HMACContext until [method finish] has been called.
|
|
</description>
|
|
</method>
|
|
<method name="update">
|
|
<return type="int" enum="Error" />
|
|
<argument index="0" name="data" type="PoolByteArray" />
|
|
<description>
|
|
Updates the message to be HMACed. This can be called multiple times before [method finish] is called to append [code]data[/code] to the message, but cannot be called until [method start] has been called.
|
|
</description>
|
|
</method>
|
|
</methods>
|
|
<constants>
|
|
</constants>
|
|
</class>
|