| crypto/internal/fips140/check | Package check implements the FIPS 140 load-time code+data verification. |
| crypto/internal/fips140/edwards25519/field | Package field implements fast arithmetic modulo 2^255-19. |
| crypto/internal/fips140/subtle | |
| crypto/internal/fips140deps/byteorder | |
| errors | Package errors implements functions to manipulate errors. |
| 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. |