| crypto | Package crypto collects common cryptographic constants. |
| crypto/internal/fips140/ed25519 | |
| crypto/internal/fips140only | |
| crypto/rand | Package rand implements a cryptographically secure random number generator. |
| 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. |
| io | Package io provides basic interfaces to I/O primitives. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |