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https://github.com/Relintai/pandemonium_engine.git
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80 lines
2.7 KiB
XML
80 lines
2.7 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="HMACContext" inherits="Reference" version="4.5">
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<brief_description>
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Used to create an HMAC for a message using a key.
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</brief_description>
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<description>
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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.
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[codeblock]
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extends Node
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var ctx = HMACContext.new()
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func _ready():
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var key = "supersecret".to_utf8()
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var err = ctx.start(HashingContext.HASH_SHA256, key)
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assert(err == OK)
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var msg1 = "this is ".to_utf8()
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var msg2 = "super duper secret".to_utf8()
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err = ctx.update(msg1)
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assert(err == OK)
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err = ctx.update(msg2)
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assert(err == OK)
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var hmac = ctx.finish()
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print(hmac.hex_encode())
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[/codeblock]
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And in C# we can use the following.
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[codeblock]
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using Godot;
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using System;
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using System.Diagnostics;
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public class CryptoNode : Node
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{
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private HMACContext ctx = new HMACContext();
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public override void _Ready()
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{
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PoolByteArray key = String("supersecret").to_utf8();
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Error err = ctx.Start(HashingContext.HASH_SHA256, key);
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GD.Assert(err == OK);
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PoolByteArray msg1 = String("this is ").to_utf8();
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PoolByteArray msg2 = String("super duper secret").to_utf8();
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err = ctx.Update(msg1);
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GD.Assert(err == OK);
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err = ctx.Update(msg2);
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GD.Assert(err == OK);
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PoolByteArray hmac = ctx.Finish();
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GD.Print(hmac.HexEncode());
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}
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}
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[/codeblock]
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[b]Note:[/b] Not available in HTML5 exports.
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</description>
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<tutorials>
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</tutorials>
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<methods>
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<method name="finish">
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<return type="PoolByteArray" />
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<description>
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Returns the resulting HMAC. If the HMAC failed, an empty [PoolByteArray] is returned.
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</description>
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</method>
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<method name="start">
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<return type="int" enum="Error" />
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<argument index="0" name="hash_type" type="int" enum="HashingContext.HashType" />
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<argument index="1" name="key" type="PoolByteArray" />
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<description>
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Initializes the HMACContext. This method cannot be called again on the same HMACContext until [method finish] has been called.
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</description>
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</method>
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<method name="update">
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<return type="int" enum="Error" />
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<argument index="0" name="data" type="PoolByteArray" />
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<description>
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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.
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</description>
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</method>
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</methods>
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<constants>
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</constants>
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</class>
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