| bytes | Package bytes implements functions for the manipulation of byte slices. |
| crypto/cipher | Package cipher implements standard block cipher modes that can be wrapped around low-level block cipher implementations. |
| crypto/subtle | Package subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly. |
| encoding/hex | Package hex implements hexadecimal encoding and decoding. |
| errors | Package errors implements functions to manipulate errors. |
| github.com/ProtonMail/go-crypto/internal/byteutil | |
| math/bits | Package bits implements bit counting and manipulation functions for the predeclared unsigned integer types. |