go/src/crypto/rc4/rc4.go

type Cipher …

type KeySizeError …

func (k KeySizeError) Error() string { … }

// NewCipher creates and returns a new [Cipher]. The key argument should be the
// RC4 key, at least 1 byte and at most 256 bytes.
func NewCipher(key []byte) (*Cipher, error) { … }

// Reset zeros the key data and makes the [Cipher] unusable.
//
// Deprecated: Reset can't guarantee that the key will be entirely removed from
// the process's memory.
func (c *Cipher) Reset() { … }

// XORKeyStream sets dst to the result of XORing src with the key stream.
// Dst and src must overlap entirely or not at all.
func (c *Cipher) XORKeyStream(dst, src []byte) { … }