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SHA256 Class

Computes the SHA256 hash for the input data.

For a list of all members of this type, see SHA256 Members.

System.Object
   System.Security.Cryptography.HashAlgorithm
      System.Security.Cryptography.SHA256
         System.Security.Cryptography.SHA256Managed

[Visual Basic]
MustInherit Public Class SHA256
   Inherits HashAlgorithm
[C#]
public abstract class SHA256 : HashAlgorithm
[C++]
public __gc __abstract class SHA256 : public HashAlgorithm
[JScript]
public abstract class SHA256 extends HashAlgorithm

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Remarks

The hash is used as a unique value of fixed size representing a large amount of data. Hashes of two sets of data should match if and only if the corresponding data also matches. Small changes to the data result in large unpredictable changes in the hash.

The hash size for the SHA256 algorithm is 256 bits.

This is an abstract class. The only implementation of this class is SHA256Managed.

Example

[Visual Basic, C#, C++] The following example computes the SHA256 hash for data and stores it in result. This example assumes that there is a predefined constant DATA_SIZE.

[Visual Basic] 
Dim data(DATA_SIZE) As Byte
Dim result() As Byte
Dim shaM As New SHA256Managed()
result = shaM.ComputeHash(data)

[C#] 
byte[] data = new byte[DATA_SIZE];
byte[] result;
SHA256 shaM = new SHA256Managed();
result = shaM.ComputeHash(data);

[C++] 
Byte data[] = new Byte[DATA_SIZE];
Byte result[];
SHA256* shaM = new SHA256Managed();
result = shaM->ComputeHash(data);

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Namespace: System.Security.Cryptography

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Assembly: Mscorlib (in Mscorlib.dll)

See Also

SHA256 Members | System.Security.Cryptography Namespace | Cryptographic Services

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