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133 lines
5.8 KiB
ReStructuredText
133 lines
5.8 KiB
ReStructuredText
:github_url: hide
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.. _class_HMACContext:
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HMACContext
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===========
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**Hereda:** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`
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Se usa para crear un HMAC para un mensaje usando una clave.
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.. rst-class:: classref-introduction-group
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Descripción
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----------------------
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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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.. tabs::
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.. code-tab:: 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_buffer()
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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_buffer()
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var msg2 = "super duper secret".to_utf8_buffer()
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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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.. code-tab:: csharp
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using Godot;
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using System.Diagnostics;
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public partial class MyNode : 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".ToUtf8Buffer();
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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 ".ToUtf8Buffer();
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byte[] msg2 = "super duper secret".ToUtf8Buffer();
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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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.. rst-class:: classref-reftable-group
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Métodos
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--------------
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.. table::
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:widths: auto
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+-----------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| :ref:`PackedByteArray<class_PackedByteArray>` | :ref:`finish<class_HMACContext_method_finish>`\ (\ ) |
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+-----------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| :ref:`Error<enum_@GlobalScope_Error>` | :ref:`start<class_HMACContext_method_start>`\ (\ hash_type\: :ref:`HashType<enum_HashingContext_HashType>`, key\: :ref:`PackedByteArray<class_PackedByteArray>`\ ) |
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+-----------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| :ref:`Error<enum_@GlobalScope_Error>` | :ref:`update<class_HMACContext_method_update>`\ (\ data\: :ref:`PackedByteArray<class_PackedByteArray>`\ ) |
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+-----------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Descripciones de Métodos
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------------------------------------------------
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.. _class_HMACContext_method_finish:
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.. rst-class:: classref-method
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:ref:`PackedByteArray<class_PackedByteArray>` **finish**\ (\ ) :ref:`🔗<class_HMACContext_method_finish>`
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Returns the resulting HMAC. If the HMAC failed, an empty :ref:`PackedByteArray<class_PackedByteArray>` is returned.
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.. rst-class:: classref-item-separator
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----
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.. _class_HMACContext_method_start:
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.. rst-class:: classref-method
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:ref:`Error<enum_@GlobalScope_Error>` **start**\ (\ hash_type\: :ref:`HashType<enum_HashingContext_HashType>`, key\: :ref:`PackedByteArray<class_PackedByteArray>`\ ) :ref:`🔗<class_HMACContext_method_start>`
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Initializes the HMACContext. This method cannot be called again on the same HMACContext until :ref:`finish()<class_HMACContext_method_finish>` has been called.
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.. rst-class:: classref-item-separator
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----
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.. _class_HMACContext_method_update:
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.. rst-class:: classref-method
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:ref:`Error<enum_@GlobalScope_Error>` **update**\ (\ data\: :ref:`PackedByteArray<class_PackedByteArray>`\ ) :ref:`🔗<class_HMACContext_method_update>`
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Updates the message to be HMACed. This can be called multiple times before :ref:`finish()<class_HMACContext_method_finish>` is called to append ``data`` to the message, but cannot be called until :ref:`start()<class_HMACContext_method_start>` has been called.
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.. |virtual| replace:: :abbr:`virtual (Normalmente, este método debería ser sobreescrito por el usuario para que tenga algún efecto.)`
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.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
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.. |const| replace:: :abbr:`const (Este método no tiene efectos secundarios. No modifica ninguna de las variables miembro de la instancia.)`
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.. |vararg| replace:: :abbr:`vararg (Este método permite agregar cualquier número de argumentos después de los descritos aquí.)`
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.. |constructor| replace:: :abbr:`constructor (Este método se utiliza para construir un tipo.)`
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.. |static| replace:: :abbr:`static (Este método no necesita una instancia para ser llamado, por lo que puede llamarse directamente utilizando el nombre de la clase.)`
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.. |operator| replace:: :abbr:`operator (Este método describe un operador válido para usar con este tipo como operando izquierdo.)`
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.. |bitfield| replace:: :abbr:`BitField (Este valor es un entero compuesto como una máscara de bits de las siguientes banderas.)`
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.. |void| replace:: :abbr:`void (Sin valor de retorno.)`
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