| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| crypto/sha512 | Package sha512 implements the SHA-384, SHA-512, SHA-512/224, and SHA-512/256 hash algorithms as defined in FIPS 180-4. |
| crypto/tls | Package tls partially implements TLS 1.2, as specified in RFC 5246, and TLS 1.3, as specified in RFC 8446. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/containerd/log | Package log provides types and functions related to logging, passing loggers through a context, and attaching context to the logger. |
| github.com/distribution/reference | Package reference provides a general type to represent any way of referencing images within the registry. |
| github.com/docker/distribution/registry/api/errcode | |
| github.com/docker/distribution/registry/client/auth | |
| github.com/docker/distribution/registry/client/auth/challenge | |
| github.com/docker/distribution/registry/client/transport | |
| github.com/docker/docker/api/types/filters | Package filters provides tools for encoding a mapping of keys to a set of multiple values. |
| github.com/docker/docker/api/types/registry | |
| github.com/docker/docker/errdefs | Package errdefs defines a set of error interfaces that packages should use for communicating classes of errors. |
| github.com/docker/docker/pkg/ioutils | |
| github.com/docker/go-connections/tlsconfig | Package tlsconfig provides primitives to retrieve secure-enough TLS configurations for both clients and servers. |
| github.com/pkg/errors | Package errors provides simple error handling primitives. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| net/http | Package http provides HTTP client and server implementations. |
| net/http/cookiejar | Package cookiejar implements an in-memory RFC 6265-compliant http.CookieJar. |
| net/url | Package url parses URLs and implements query escaping. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| regexp | Package regexp implements regular expression search. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |