SymmetricAlgorithm.GetCiphertextLengthCbc(Int32, PaddingMode) Method
Definition
Important
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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
The length, in bytes, of the ciphertext with padding.
Exceptions
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.
BlockSize is not a positive integer.
-or-
BlockSize is not a whole number of bytes. It must be divisible by 8.
The padding mode None was used, but plaintextLength
is not a whole number of blocks.
Applies to
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