| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| crypto/x509 | Package x509 implements a subset of the X.509 standard. |
| encoding/base64 | Package base64 implements base64 encoding as specified by RFC 4648. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| 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/golang/glog | Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup. |
| github.com/google/certificate-transparency-go | Package ct holds core types and utilities for Certificate Transparency. |
| github.com/google/certificate-transparency-go/internal/witness/api | Package api provides the API endpoints for the witness. |
| github.com/google/certificate-transparency-go/internal/witness/client/http | Package http is a simple client for interacting with witnesses over HTTP. |
| github.com/google/certificate-transparency-go/internal/witness/verifier | Package verifier is designed to verify the signatures produced by a witness. |
| github.com/google/certificate-transparency-go/loglist3 | Package loglist3 allows parsing and searching of the master CT Log list. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| net/http | Package http provides HTTP client and server implementations. |
| net/url | Package url parses URLs and implements query escaping. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |