| bufio | Package bufio implements buffered I/O. |
| bytes | Package bytes implements functions for the manipulation of byte slices. |
| crypto | Package crypto collects common cryptographic constants. |
| golang.org/x/crypto/openpgp/armor | Package armor implements OpenPGP ASCII Armor, see RFC 4880. |
| golang.org/x/crypto/openpgp/errors | Package errors contains common error types for the OpenPGP packages. |
| golang.org/x/crypto/openpgp/packet | Package packet implements parsing and serialization of OpenPGP packets, as specified in RFC 4880. |
| hash | Package hash provides interfaces for hash functions. |
| io | Package io provides basic interfaces to I/O primitives. |
| net/textproto | Package textproto implements generic support for text-based request/response protocols in the style of HTTP, NNTP, and SMTP. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |