HashAlgorithm.Create Method
Definition
Important
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Creates an instance of an implementation of a hash algorithm.
Overloads
| Create() |
Obsolete.
Obsolete.
Creates an instance of the default implementation of a hash algorithm. |
| Create(String) |
Obsolete.
Creates an instance of the specified implementation of a hash algorithm. |
Create()
- Source:
- HashAlgorithm.cs
- Source:
- HashAlgorithm.cs
- Source:
- HashAlgorithm.cs
Caution
The default implementation of this cryptography algorithm is not supported
Caution
The default implementation of this cryptography algorithm is not supported.
Creates an instance of the default implementation of a hash algorithm.
public:
static System::Security::Cryptography::HashAlgorithm ^ 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.HashAlgorithm 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.HashAlgorithm Create ();public static System.Security.Cryptography.HashAlgorithm 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.HashAlgorithm[<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.HashAlgorithmstatic member Create : unit -> System.Security.Cryptography.HashAlgorithmPublic Shared Function Create () As HashAlgorithmReturns
A new SHA1CryptoServiceProvider instance, unless the default settings have been changed using the .
- Attributes
Exceptions
.NET Core 2.0 - 3.1 and .NET 5 and later: In all cases.
Remarks
This method is obsolete in .NET 5 and later versions.
By default, this overload uses the SHA1CryptoServiceProvider implementation of a hash algorithm. If you want to specify a different implementation, use the Create(String) overload, which lets you specify an algorithm name, instead. The cryptography configuration system defines the default implementation of HashAlgorithm.
Due to collision problems with SHA1, Microsoft recommends a security model based on SHA256 or better.
Applies to
Create(String)
- Source:
- HashAlgorithm.cs
- Source:
- HashAlgorithm.cs
- Source:
- HashAlgorithm.cs
Caution
Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.
Creates an instance of the specified implementation of a hash algorithm.
public:
static System::Security::Cryptography::HashAlgorithm ^ Create(System::String ^ hashName);public static System.Security.Cryptography.HashAlgorithm? Create (string hashName);[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.HashAlgorithm? Create (string hashName);public static System.Security.Cryptography.HashAlgorithm Create (string hashName);static member Create : string -> System.Security.Cryptography.HashAlgorithm[<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.HashAlgorithmPublic Shared Function Create (hashName As String) As HashAlgorithmParameters
- hashName
- String
The hash algorithm implementation to use. The following table shows the valid values for the hashName parameter and the algorithms they map to.
| Parameter value | Implements |
|---|---|
| SHA | SHA1CryptoServiceProvider |
| SHA1 | SHA1CryptoServiceProvider |
| System.Security.Cryptography.SHA1 | SHA1CryptoServiceProvider |
| System.Security.Cryptography.HashAlgorithm | SHA1CryptoServiceProvider |
| MD5 | MD5CryptoServiceProvider |
| System.Security.Cryptography.MD5 | MD5CryptoServiceProvider |
| SHA256 | SHA256Managed |
| SHA-256 | SHA256Managed |
| System.Security.Cryptography.SHA256 | SHA256Managed |
| SHA384 | SHA384Managed |
| SHA-384 | SHA384Managed |
| System.Security.Cryptography.SHA384 | SHA384Managed |
| SHA512 | SHA512Managed |
| SHA-512 | SHA512Managed |
| System.Security.Cryptography.SHA512 | SHA512Managed |
Returns
A new instance of the specified hash algorithm, or null if hashName is not a valid hash algorithm.
- Attributes
