Export (0) Print
Expand All

SHA1 Class

Computes the SHA1 hash for the input data.

Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)

[ComVisibleAttribute(true)] 
public abstract class SHA1 : HashAlgorithm
/** @attribute ComVisibleAttribute(true) */ 
public abstract class SHA1 extends HashAlgorithm
ComVisibleAttribute(true) 
public abstract class SHA1 extends HashAlgorithm
Not applicable.

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.

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);

ubyte data[] = new ubyte[data_Size];
ubyte result[];
SHA1 sha = new SHA1CryptoServiceProvider();

// This is one implementation of the abstract class SHA1.
result = sha.ComputeHash(data);

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 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

Community Additions

ADD
Show:
© 2014 Microsoft