| crypto | Package crypto collects common cryptographic constants. |
| crypto/internal/boring | Package boring provides access to BoringCrypto implementation functions. |
| crypto/internal/edwards25519/field | |
| crypto/internal/nistec | |
| crypto/internal/randutil | Package randutil contains internal randomness utilities for various crypto packages. |
| crypto/subtle | Package subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly. |
| errors | Package errors implements functions to manipulate errors. |
| internal/byteorder | Package byteorder provides functions for decoding and encoding little and big endian integer types from/to byte slices. |
| io | Package io provides basic interfaces to I/O primitives. |
| math/bits | Package bits implements bit counting and manipulation functions for the predeclared unsigned integer types. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |