CoseSign1Message.VerifyDetachedAsync Method

Definition

Namespace:

System.Security.Cryptography.Cose

Assembly:

System.Security.Cryptography.Cose.dll

Package:

System.Security.Cryptography.Cose v9.0.0-rc.2.24473.5

Asynchronously verifies that the signature is valid for the content using the specified key.

public System.Threading.Tasks.Task<bool> VerifyDetachedAsync (System.Security.Cryptography.AsymmetricAlgorithm key, System.IO.Stream detachedContent, ReadOnlyMemory<byte> associatedData = default, System.Threading.CancellationToken cancellationToken = default);

member this.VerifyDetachedAsync : System.Security.Cryptography.AsymmetricAlgorithm * System.IO.Stream * ReadOnlyMemory<byte> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<bool>

Public Function VerifyDetachedAsync (key As AsymmetricAlgorithm, detachedContent As Stream, Optional associatedData As ReadOnlyMemory(Of Byte) = Nothing, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Boolean)

Parameters

key

AsymmetricAlgorithm

The public key that is associated with the private key that was used to sign the content.

detachedContent

Stream

The content that was previously signed.

associatedData

ReadOnlyMemory<Byte>

The extra data associated with the signature, which must match the value provided during signing.

cancellationToken

CancellationToken

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

Returns

Task<Boolean>

A task whose Task<TResult> property is true if the signature is valid; otherwise, false.

Exceptions

ArgumentNullException

key or detachedContent is null.

ArgumentException

key is of an unsupported type.

-or-

detachedContent does not support reading or seeking.

InvalidOperationException

The content is embedded on this message, use an overload that uses embedded content.

CryptographicException

ProtectedHeaders does not have a value for the Algorithm header.

-or-

The algorithm protected header was incorrectly formatted.

-or-

The algorithm protected header was not one of the values supported by this implementation.

-or-

The algorithm protected header doesn't match with the algorithms supported by the specified key.

OperationCanceledException

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