HMACSHA256.HashDataAsync Method

Definition

Namespace:

System.Security.Cryptography

Assembly:

System.Security.Cryptography.dll

Overloads

HashDataAsync(Byte[], Stream, CancellationToken)	Asynchronously computes the HMAC of a stream using the SHA256 algorithm.
HashDataAsync(ReadOnlyMemory<Byte>, Stream, CancellationToken)	Asynchronously computes the HMAC of a stream using the SHA256 algorithm.
HashDataAsync(ReadOnlyMemory<Byte>, Stream, Memory<Byte>, CancellationToken)	Asynchronously computes the HMAC of a stream using the SHA256 algorithm.

HashDataAsync(Byte[], Stream, CancellationToken)

Source:

HMACSHA256.cs

Asynchronously computes the HMAC of a stream using the SHA256 algorithm.

public static System.Threading.Tasks.ValueTask<byte[]> HashDataAsync (byte[] key, System.IO.Stream source, System.Threading.CancellationToken cancellationToken = default);

static member HashDataAsync : byte[] * System.IO.Stream * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<byte[]>

Public Shared Function HashDataAsync (key As Byte(), source As Stream, Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Byte())

Parameters

key

Byte[]

The HMAC key.

source

Stream

The stream to HMAC.

cancellationToken

CancellationToken

The token to monitor for cancellation requests. The default value is None.

Returns

ValueTask<Byte[]>

The HMAC of the data.

Exceptions

ArgumentNullException

key or source is null.

ArgumentException

source does not support reading.

OperationCanceledException

The cancellation token was canceled. This exception is stored into the returned task.

Remarks

This method stores in the task it returns all non-usage exceptions that the method's synchronous counterpart can throw. If an exception is stored into the returned task, that exception will be thrown when the task is awaited. Usage exceptions, such as ArgumentException, are still thrown synchronously. For the stored exceptions, see the exceptions thrown by HashData(Byte[], Stream).

HashDataAsync(ReadOnlyMemory<Byte>, Stream, CancellationToken)

Source:

HMACSHA256.cs

Asynchronously computes the HMAC of a stream using the SHA256 algorithm.

public static System.Threading.Tasks.ValueTask<byte[]> HashDataAsync (ReadOnlyMemory<byte> key, System.IO.Stream source, System.Threading.CancellationToken cancellationToken = default);

static member HashDataAsync : ReadOnlyMemory<byte> * System.IO.Stream * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<byte[]>

Public Shared Function HashDataAsync (key As ReadOnlyMemory(Of Byte), source As Stream, Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Byte())

Parameters

key

ReadOnlyMemory<Byte>

The HMAC key.

source

Stream

The stream to HMAC.

cancellationToken

CancellationToken

The token to monitor for cancellation requests. The default value is None.

Returns

ValueTask<Byte[]>

The HMAC of the data.

Exceptions

ArgumentNullException

source is null.

ArgumentException

source does not support reading.

OperationCanceledException

The cancellation token was canceled. This exception is stored into the returned task.

HashDataAsync(ReadOnlyMemory<Byte>, Stream, Memory<Byte>, CancellationToken)

Source:

HMACSHA256.cs

Asynchronously computes the HMAC of a stream using the SHA256 algorithm.

public static System.Threading.Tasks.ValueTask<int> HashDataAsync (ReadOnlyMemory<byte> key, System.IO.Stream source, Memory<byte> destination, System.Threading.CancellationToken cancellationToken = default);

static member HashDataAsync : ReadOnlyMemory<byte> * System.IO.Stream * Memory<byte> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<int>

Public Shared Function HashDataAsync (key As ReadOnlyMemory(Of Byte), source As Stream, destination As Memory(Of Byte), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Integer)

Parameters

key

ReadOnlyMemory<Byte>

The HMAC key.

source

Stream

The stream to HMAC.

destination

Memory<Byte>

The buffer to receive the HMAC value.

cancellationToken

CancellationToken

The token to monitor for cancellation requests. The default value is None.

Returns

ValueTask<Int32>

The total number of bytes written to destination.

Exceptions

ArgumentNullException

source is null.

ArgumentException

The buffer in destination is too small to hold the calculated hash size. The SHA256 algorithm always produces a 256-bit hash, or 32 bytes.

-or-

source does not support reading.

OperationCanceledException

The cancellation token was canceled. This exception is stored into the returned task.