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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="RefCounted" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
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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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[codeblocks]
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[gdscript]
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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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[/gdscript]
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[csharp]
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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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byte[] key = "supersecret".ToUTF8();
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Error err = ctx.Start(HashingContext.HashType.Sha256, key);
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Debug.Assert(err == Error.Ok);
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byte[] msg1 = "this is ".ToUTF8();
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byte[] msg2 = "super duper secret".ToUTF8();
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err = ctx.Update(msg1);
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Debug.Assert(err == Error.Ok);
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err = ctx.Update(msg2);
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Debug.Assert(err == Error.Ok);
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byte[] hmac = ctx.Finish();
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GD.Print(hmac.HexEncode());
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}
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}
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[/csharp]
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[/codeblocks]
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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="PackedByteArray" />
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<description>
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Returns the resulting HMAC. If the HMAC failed, an empty [PackedByteArray] 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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<param index="0" name="hash_type" type="int" enum="HashingContext.HashType" />
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<param index="1" name="key" type="PackedByteArray" />
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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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<param index="0" name="data" type="PackedByteArray" />
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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 [param data] 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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</class>
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