| encoding/pem | Package pem implements the PEM data encoding, which originated in Privacy Enhanced Mail. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/google/certificate-transparency-go | Package ct holds core types and utilities for Certificate Transparency. |
| github.com/google/certificate-transparency-go/client | Package client is a CT log client implementation and contains types and code for interacting with RFC6962-compliant CT Log instances. |
| github.com/google/certificate-transparency-go/jsonclient | Package jsonclient provides a simple client for fetching and parsing JSON CT structures from a log. |
| github.com/google/certificate-transparency-go/x509 | Package x509 parses X.509-encoded keys and certificates. |
| github.com/google/certificate-transparency-go/x509util | Package x509util includes utility code for working with X.509 certificates from the x509 package. |
| golang.org/x/net/context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| log | Package log implements a simple logging package. |
| net/http | Package http provides HTTP client and server implementations. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| time | Package time provides functionality for measuring and displaying time. |