HMAC.Create Metodo

Definizione

Spazio dei nomi:
System.Security.Cryptography
Assembly:
netstandard.dll, System.Security.Cryptography.dll
Assembly:
netstandard.dll, System.Security.Cryptography.Primitives.dll
Assembly:
System.Security.Cryptography.Primitives.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll

Crea un'istanza di un'implementazione di un codice di autenticazione messaggi basato su hash (HMAC).

Overload

Nome Descrizione
Create()
Obsoleti.
Obsoleti.

Crea un'istanza dell'implementazione predefinita di un codice HMAC (Hash-based Message Authentication Code).
Create(String)
Obsoleti.

Crea un'istanza dell'implementazione specificata di un codice HMAC (Hash-based Message Authentication Code).

Create()

Origine:
HMAC.cs
Origine:
HMAC.cs
Origine:
HMAC.cs
Origine:
HMAC.cs
Origine:
HMAC.cs

Attenzione

The default implementation of this cryptography algorithm is not supported.

Attenzione

The default implementation of this cryptography algorithm is not supported

Crea un'istanza dell'implementazione predefinita di un codice HMAC (Hash-based Message Authentication Code).

public:
 static System::Security::Cryptography::HMAC ^ Create();
[System.Obsolete("The default implementation of this cryptography algorithm is not supported.", DiagnosticId="SYSLIB0007", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public static System.Security.Cryptography.HMAC Create();
[System.Obsolete("The default implementation of this cryptography algorithm is not supported", DiagnosticId="SYSLIB0007", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public static System.Security.Cryptography.HMAC Create();
public static System.Security.Cryptography.HMAC Create();
[<System.Obsolete("The default implementation of this cryptography algorithm is not supported.", DiagnosticId="SYSLIB0007", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
static member Create : unit -> System.Security.Cryptography.HMAC
[<System.Obsolete("The default implementation of this cryptography algorithm is not supported", DiagnosticId="SYSLIB0007", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
static member Create : unit -> System.Security.Cryptography.HMAC
static member Create : unit -> System.Security.Cryptography.HMAC
Public Shared Function Create () As HMAC

Valori restituiti

HMAC

Nuova istanza SHA-1, a meno che le impostazioni predefinite non siano state modificate usando l'elemento< cryptoClass>.

Attributi
ObsoleteAttribute

Eccezioni

PlatformNotSupportedException

.NET Core 2.0 - 3.1 e .NET 5 e versioni successive: in tutti i casi.

Commenti

Questo metodo è obsoleto in .NET 5 e versioni successive.

Per impostazione predefinita, questo overload usa l'implementazione SHA-1 di HMAC. Se si vuole specificare un'implementazione diversa, usare l'overload Create(String) , che consente di specificare invece un nome di algoritmo.

A causa di problemi di collisione con SHA-1, Microsoft consiglia un modello di sicurezza basato su SHA-256 o superiore.

Si applica a

Create(String)

Origine:
HMAC.cs
Origine:
HMAC.cs
Origine:
HMAC.cs
Origine:
HMAC.cs
Origine:
HMAC.cs

Attenzione

Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.

Crea un'istanza dell'implementazione specificata di un codice HMAC (Hash-based Message Authentication Code).

public:
 static System::Security::Cryptography::HMAC ^ Create(System::String ^ algorithmName);
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")]
[System.Obsolete("Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.", DiagnosticId="SYSLIB0045", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public static System.Security.Cryptography.HMAC? Create(string algorithmName);
public static System.Security.Cryptography.HMAC? Create(string algorithmName);
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")]
public static System.Security.Cryptography.HMAC? Create(string algorithmName);
public static System.Security.Cryptography.HMAC Create(string algorithmName);
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")>]
[<System.Obsolete("Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.", DiagnosticId="SYSLIB0045", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
static member Create : string -> System.Security.Cryptography.HMAC
static member Create : string -> System.Security.Cryptography.HMAC
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")>]
static member Create : string -> System.Security.Cryptography.HMAC
Public Shared Function Create (algorithmName As String) As HMAC

Parametri

algorithmName
String

Implementazione HMAC da usare. La tabella seguente mostra i valori validi per il algorithmName parametro e gli algoritmi a cui eseguono il mapping.

Valore del parametro Implementa
System.Security.Cryptography.HMAC HMACSHA1
System.Security.Cryptography.KeyedHashAlgorithm HMACSHA1
HMACMD5 HMACMD5
System.Security.Cryptography.HMACMD5 HMACMD5
HMACRIPEMD160 HMACRIPEMD160
System.Security.Cryptography.HMACRIPEMD160 HMACRIPEMD160
HMACSHA1 HMACSHA1
System.Security.Cryptography.HMACSHA1 HMACSHA1
HMACSHA256 HMACSHA256
System.Security.Cryptography.HMACSHA256 HMACSHA256
HMACSHA384 HMACSHA384
System.Security.Cryptography.HMACSHA384 HMACSHA384
HMACSHA512 HMACSHA512
System.Security.Cryptography.HMACSHA512 HMACSHA512
Mactripledes MACTripleDES
System.Security.Cryptography.MACTripleDES MACTripleDES

Valori restituiti

HMAC

Nuova istanza dell'implementazione HMAC specificata.

Attributi
RequiresUnreferencedCodeAttribute ObsoleteAttribute

Commenti

HMAC supporta diversi algoritmi hash, tra cui MD5, SHA-1, SHA-256 e RIPEMD160. Per l'elenco completo, vedere i valori supportati per il algorithmName parametro .

A causa di problemi di collisione con MD5 e SHA-1, Microsoft consiglia un modello di sicurezza basato su SHA-256 o superiore.

Si applica a