SHA1Managed Class

Definition

Computes the SHA1 hash for the input data using the managed library.

public ref class SHA1Managed : System::Security::Cryptography::SHA1
[System.Runtime.InteropServices.ComVisible(true)]
public class SHA1Managed : System.Security.Cryptography.SHA1
type SHA1Managed = class
    inherit SHA1
Public Class SHA1Managed
Inherits SHA1
Inheritance
SHA1Managed
Attributes

Examples

The following example computes the SHA1Managed hash for data and stores it in result. This example assumes that there is a predefined constant DATA_SIZE.

array<Byte>^ data = gcnew array<Byte>( DATA_SIZE );
array<Byte>^ result;
SHA1^ shaM = gcnew SHA1Managed;
result = shaM->ComputeHash( data );
byte[] data = new byte[DATA_SIZE];
byte[] result;
SHA1 shaM = new SHA1Managed();
result = shaM.ComputeHash(data);
Dim data(DATA_SIZE) As Byte
Dim result() As Byte
Dim shaM As New SHA1Managed()
result = shaM.ComputeHash(data)

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.

This is a purely managed implementation of SHA1 that does not wrap CAPI.

The hash size for the SHA1Managed algorithm is 160 bits.

Due to collision problems with SHA1, Microsoft recommends a security model based on SHA256 or better.

Constructors

SHA1Managed()

Initializes a new instance of the SHA1Managed class.

Fields

HashSizeValue

Represents the size, in bits, of the computed hash code.

(Inherited from HashAlgorithm)
HashValue

Represents the value of the computed hash code.

(Inherited from HashAlgorithm)
State

Represents the state of the hash computation.

(Inherited from HashAlgorithm)

Properties

CanReuseTransform

Gets a value indicating whether the current transform can be reused.

(Inherited from HashAlgorithm)
CanTransformMultipleBlocks

When overridden in a derived class, gets a value indicating whether multiple blocks can be transformed.

(Inherited from HashAlgorithm)
Hash

Gets the value of the computed hash code.

(Inherited from HashAlgorithm)
HashSize

Gets the size, in bits, of the computed hash code.

(Inherited from HashAlgorithm)
InputBlockSize

When overridden in a derived class, gets the input block size.

(Inherited from HashAlgorithm)
OutputBlockSize

When overridden in a derived class, gets the output block size.

(Inherited from HashAlgorithm)

Methods

Clear()

Releases all resources used by the HashAlgorithm class.

(Inherited from HashAlgorithm)
ComputeHash(Byte[])

Computes the hash value for the specified byte array.

(Inherited from HashAlgorithm)
ComputeHash(Byte[], Int32, Int32)

Computes the hash value for the specified region of the specified byte array.

(Inherited from HashAlgorithm)
ComputeHash(Stream)

Computes the hash value for the specified Stream object.

(Inherited from HashAlgorithm)
Dispose()

Releases all resources used by the current instance of the HashAlgorithm class.

(Inherited from HashAlgorithm)
Dispose(Boolean)

Releases unmanaged resources used by the SHA1Managed object and optionally releases the managed resources.

Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
Finalize()

Frees resources and performs other cleanup operations for this object before it is reclaimed by garbage collection.

GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType()

Gets the Type of the current instance.

(Inherited from Object)
HashCore(Byte[], Int32, Int32)

Routes data written to the object into the SHA1Managed hash algorithm for computing the hash.

HashCore(ReadOnlySpan<Byte>)

Routes data written to the object into the hash algorithm for computing the hash.

HashFinal()

Returns the computed SHA1 hash value after all data has been written to the object.

Initialize()

Initializes an instance of SHA1Managed.

MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString()

Returns a string that represents the current object.

(Inherited from Object)
TransformBlock(Byte[], Int32, Int32, Byte[], Int32)

Computes the hash value for the specified region of the input byte array and copies the specified region of the input byte array to the specified region of the output byte array.

(Inherited from HashAlgorithm)
TransformFinalBlock(Byte[], Int32, Int32)

Computes the hash value for the specified region of the specified byte array.

(Inherited from HashAlgorithm)
TryComputeHash(ReadOnlySpan<Byte>, Span<Byte>, Int32)

Attempts to compute the hash value for the specified byte array.

(Inherited from HashAlgorithm)
TryHashFinal(Span<Byte>, Int32)

Attempts to finalize the hash computation after the last data is processed by the hash algorithm.

Explicit Interface Implementations

IDisposable.Dispose()

Releases the unmanaged resources used by the HashAlgorithm and optionally releases the managed resources.

(Inherited from HashAlgorithm)

Applies to

See also