SymmetricAlgorithm.GetCiphertextLengthCbc(Int32, PaddingMode) Method

Definition

Namespace:

System.Security.Cryptography

Assembly:

System.Security.Cryptography.dll

Source:

SymmetricAlgorithm.cs

Gets the length of a ciphertext with a given padding mode and plaintext length in CBC mode.

public int GetCiphertextLengthCbc (int plaintextLength, System.Security.Cryptography.PaddingMode paddingMode = System.Security.Cryptography.PaddingMode.PKCS7);

member this.GetCiphertextLengthCbc : int * System.Security.Cryptography.PaddingMode -> int

Public Function GetCiphertextLengthCbc (plaintextLength As Integer, Optional paddingMode As PaddingMode = System.Security.Cryptography.PaddingMode.PKCS7) As Integer

Parameters

plaintextLength

Int32

The plaintext length, in bytes.

paddingMode

PaddingMode

The padding mode used to pad the plaintext to the algorithm's block size.

Returns

Int32

The length, in bytes, of the ciphertext with padding.

Exceptions

ArgumentOutOfRangeException

plaintextLength is a negative number.

-or-

plaintextLength when padded is too large to represent as a signed 32-bit integer.

-or-

paddingMode is not a valid padding mode.

CryptographicException

BlockSize is not a positive integer.

-or-

BlockSize is not a whole number of bytes. It must be divisible by 8.

ArgumentException

The padding mode None was used, but plaintextLength is not a whole number of blocks.