| crypto/sha256 | Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4. |
| 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. |
| crypto/x509 | Package x509 implements a subset of the X.509 standard. |
| flag | Package flag implements command-line flag parsing. |
| github.com/IBM/sarama | Package sarama is a pure Go client library for dealing with Apache Kafka (versions 0.8 and later). |
| github.com/xdg-go/scram | Package scram provides client and server implementations of the Salted Challenge Response Authentication Mechanism (SCRAM) described in RFC-5802 and RFC-7677. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| os/signal | Package signal implements access to incoming signals. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |