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SymmetricAlgorithm.TryEncryptCfb Method

Definition

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

public bool TryEncryptCfb (ReadOnlySpan<byte> plaintext, ReadOnlySpan<byte> iv, Span<byte> destination, out int bytesWritten, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.None, int feedbackSizeInBits = 8);
member this.TryEncryptCfb : ReadOnlySpan<byte> * ReadOnlySpan<byte> * Span<byte> * int * System.Security.Cryptography.PaddingMode * int -> bool
Public Function TryEncryptCfb (plaintext 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

plaintext
ReadOnlySpan<Byte>

The data to encrypt.

iv
ReadOnlySpan<Byte>

The initialization vector.

destination
Span<Byte>

The buffer to receive the ciphertext 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 encrypted 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 plaintext could not be encrypted successfully.

-or-

The feedback size is not valid for the algorithm.

Remarks

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

Applies to