func golang.org/x/crypto/cast5.NewCipher

2 uses

	golang.org/x/crypto/cast5 (current package)
		cast5.go#L26: func NewCipher(key []byte) (c *Cipher, err error) {

	golang.org/x/crypto/openpgp/packet
		packet.go#L520: 		block, _ = cast5.NewCipher(key)