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SymmetricAlgorithm.TryDecryptCfb Method

Definition

Attempts to decrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size.

public bool TryDecryptCfb (ReadOnlySpan<byte> ciphertext, ReadOnlySpan<byte> iv, Span<byte> destination, out int bytesWritten, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);
member this.TryDecryptCfb : ReadOnlySpan<byte> * ReadOnlySpan<byte> * Span<byte> * int * System.Security.Cryptography.PaddingMode * int -> bool
Public Function TryDecryptCfb (ciphertext As ReadOnlySpan(Of Byte), iv As ReadOnlySpan(Of Byte), destination As Span(Of Byte), ByRef bytesWritten As Integer, Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.None, Optional feedbackSizeInBits As Integer = 8) As Boolean

Parameters

ciphertext
ReadOnlySpan<Byte>

The data to decrypt.

iv
ReadOnlySpan<Byte>

The initialization vector.

destination
Span<Byte>

The buffer to receive the plaintext data.

bytesWritten
Int32

When this method returns, contains the total number of bytes written to destination.

paddingMode
PaddingMode

The padding mode used to produce the ciphertext and remove during decryption.

feedbackSizeInBits
Int32

The feedback size, specified in bits.

Returns

true if destination was large enough to receive the decrypted data; otherwise, false.

Exceptions

paddingMode is not a valid padding mode.

-or-

feedbackSizeInBits is not positive or represent a whole number of bytes.

iv is the incorrect length. Callers are expected to pass an initialization vector that is exactly BlockSize in length, converted to bytes (BlockSize / 8).

The ciphertext could not be decrypted successfully.

-or-

feedbackSizeInBits is not valid for the algorithm.

Remarks

This method's behavior is defined by TryDecryptCfbCore(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32, Int32).

Applies to