CipherStreamInit Method

public int Init(
	byte[] key,
	byte[] iv,
	int counter,
	CipherStreamAlgorithm streamAlg
)

Public Function Init ( 
	key As Byte(),
	iv As Byte(),
	counter As Integer,
	streamAlg As CipherStreamAlgorithm
) As Integer

Parameters

key  Byte

Key

iv  Byte

Initialization Vector (IV, nonce) or null for Arcfour

counter  Int32

Counter value for ChaCha20 only, otherwise ignored. Use 0 for default.

streamAlg  CipherStreamAlgorithm

Stream cipher algorithm

Return Value

• Arcfour: any length key; specify null for IV.
• Salsa20: key must be exactly 16 or 32 bytes and IV exactly 8 bytes long.
• ChaCha20: key must be exactly 16 or 32 bytes and IV exactly 8, 12, or 16 bytes long. Counter is ignored if IV is 16 bytes.

Reference