| compress/gzip | Package gzip implements reading and writing of gzip format compressed files, as specified in RFC 1952. |
| crypto/sha256 | Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4. |
| encoding/hex | Package hex implements hexadecimal encoding and decoding. |
| errors | Package errors implements functions to manipulate errors. |
| github.com/google/go-containerregistry/pkg/v1 | Package v1 defines structured types for OCI v1 images |
| github.com/google/go-containerregistry/pkg/v1/types | Package types holds common OCI media types. |
| hash | Package hash provides interfaces for hash functions. |
| io | Package io provides basic interfaces to I/O primitives. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |