padding

func Pad00 ¶

func Pad00(data []byte, blockSize int) ([]byte, error)

Pad00 pads the data with 0x00s until the data is an exact multiple of the block size. When the data size is already a multiple of the block size, nothing will be added. This is equivalent to ISO 9797-1 Padding Method 1.

func Pad00Extra ¶

func Pad00Extra(data []byte, blockSize int) ([]byte, error)

Pad80Extra pads the data with 0x00s until the data is an exact multiple of the block size. When the data size is already a multiple of the block size, a new block will be added following the same rules.

func Pad80 ¶

func Pad80(data []byte, blockSize int) ([]byte, error)

Pad80 pads the data with byte 0x80 and then 0x00s until the data is an exact multiple of the block size. When the data size is already a multiple of the block size, nothing will be added. This is equivalent to ISO 9797-1 Padding Method 2.

func Pad80Extra ¶

func Pad80Extra(data []byte, blockSize int) ([]byte, error)

Pad80Extra pads the data with byte 0x80 and then 0x00s until the data is an exact multiple of the block size. When the data size is already a multiple of the block size, a new block will be added following the same rules.

func PadOrTruncateRight ¶

func PadOrTruncateRight(data []byte, length int) []byte

func PadOrTruncateRightWithByte ¶

func PadOrTruncateRightWithByte(data []byte, length int, b byte) []byte