Computes the SHA1 hash for the input data.
(in mscorlib.dll)
Visual Basic (Declaration)
<ComVisibleAttribute(True)> _
Public MustInherit Class SHA1 _
Inherits HashAlgorithm
[ComVisibleAttribute(true)]
public abstract class SHA1 : HashAlgorithm
[ComVisibleAttribute(true)]
public ref class SHA1 abstract : public HashAlgorithm
public abstract class SHA1 extends HashAlgorithm
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 the corresponding data also matches. Small changes to the data result in large, unpredictable changes in the hash.
The hash size for the SHA1 algorithm is 160 bits.
The following example computes the SHA1 hash for data and stores it in result. This example assumes that there is a predefined constant DATA_SIZE.
Dim data(DATA_SIZE) As Byte
Dim result() As Byte
Dim sha As New SHA1CryptoServiceProvider()
' This is one implementation of the abstract class SHA1.
result = sha.ComputeHash(data)
byte[] data = new byte[DATA_SIZE];
byte[] result;
SHA1 sha = new SHA1CryptoServiceProvider();
// This is one implementation of the abstract class SHA1.
result = sha.ComputeHash(data);
array<Byte>^ data = gcnew array<Byte>( DATA_SIZE );
array<Byte>^ result;
SHA1^ sha = gcnew SHA1CryptoServiceProvider;
// This is one implementation of the abstract class SHA1.
result = sha->ComputeHash( data );
System..::.Object
System.Security.Cryptography..::.HashAlgorithm
System.Security.Cryptography..::.SHA1
System.Security.Cryptography..::.SHA1Cng
System.Security.Cryptography..::.SHA1CryptoServiceProvider
System.Security.Cryptography..::.SHA1Managed
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 3.5, 2.0
Reference
Other Resources